68 results on '"Ruiquan, Liao"'
Search Results
2. Optimization of the Pressure Drop Prediction Model of Wellbore Multiphase Flow Based on Simultaneous Perturbation Stochastic Approximation
- Author
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Donghui Zhou, Ruiquan Liao, Wei Wang, Bin Ma, and Wei Luo
- Subjects
Fluid Flow and Transfer Processes ,Mechanical Engineering ,Condensed Matter Physics - Abstract
In the process of gas lift design and condition diagnosis, the accuracy and timeliness of wellbore multiphase flow model prediction results are the basis for all subsequent work. However, for the commonly used wellbore multiphase flow pressure drop prediction models, there is a big deviation between the predicted value and the measured one, and the optimization based on the measured data is time-consuming, and it is difficult to obtain the optimal parameters of the model. Therefore, based on the well bore pressure distribution data measured quickly in area R of an oil field in Kazakhstan, a better prediction model of multiphase flow in the well bore was selected at first. Then, the simultaneous perturbation stochastic approximation (SPSA) algorithm was incorporated in the wellbore multiphase flow model to optimize the liquid holdup, which is the leading factor in the model. After repeated single well optimization and greedy selection, the optimal parameters suitable for the whole block were obtained. The example shows that the optimization speed is 10 times faster than that of Particle Swarm Optimization (PSO). After that, the optimized model was used to predict the wellbore pressure distribution, and it was found that the relative error between the measured value and the predicted one was less than 15%.
- Published
- 2022
3. Experimental study of swirling flow pneumatic liquid-carrying characteristics in the vortex tool inserted tube under liquid loading conditions
- Author
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Zhao Zhang, Jie Liu, Ruiquan Liao, and Fushan Cheng
- Subjects
Fluid Flow and Transfer Processes ,Nuclear Energy and Engineering ,Mechanical Engineering ,General Chemical Engineering ,Aerospace Engineering - Published
- 2023
4. An Improved Pressure Drop Prediction Model Based on Okiszewski’s Model for Low Gas-liquid Ratio Two-Phase Upward Flow in Vertical Pipe
- Author
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Yong Dong, Ruiquan Liao, Wei Luo, and Mengxia Li
- Subjects
Fluid Flow and Transfer Processes ,Mechanical Engineering ,Condensed Matter Physics - Published
- 2022
5. Research on Slug Flow Elimination Method Based on Kinetic Energy Conversion
- Author
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Ruiquan Liao, Donghui Zhou, Zhihui Wang, Weixia Yang, and Xingkai Zhang
- Subjects
Article Subject ,General Earth and Planetary Sciences - Abstract
Slug flow is one of the most common flow patterns in the petrochemical industry. It will affect the normal operation of oil well surface pipelines and connected equipment, especially gas well multiphase flowmeters. The extant slug flow traps are complex in structure and limited in application sites. To reduce the influence of slug flow on gas-liquid two-phase measurement, a slug flow elimination device is designed based on the kinetic energy conversion method. The gas-liquid two-phase flow law inside the device and its energy loss are investigated using a combination of indoor experiments and numerical simulations. This study evaluates the device’s working performance, including the flow pattern, pressure fluctuation, velocity distribution, and energy loss. The results show that the flow rate and pressure fluctuation of the gas-liquid two-phase flow are weakened after the device. And the flow pattern changes from intermittent slug flow to gas-liquid continuous flow. The pressure drop calculation method for the device is developed based on the share of different structures in the total pressure drop, with a prediction error of 20%. The slug elimination device is designed to provide a flow pattern basis for metering equipment, improve metering accuracy, and further promote the development of multiphase metering technology.
- Published
- 2023
- Full Text
- View/download PDF
6. Drainage Research of Different Tube Depth in Horizontal Gas Well
- Author
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Xiuwu Wang, Wenmin Ma, Wei Luo, and Ruiquan Liao
- Subjects
energy_fuel_technology - Abstract
As the structure of horizontal gas wells is more complicated than that of vertical wells, the form of the liquid-carrying in different sections does not well agree. This makes it problematic to apply the widely used liquid-carrying theory of vertical gas wells in horizontal gas wells. Since the theory focused on the critical gas flow rate, it cannot quantify how much liquid it can remove. Simultaneously, it ignores the fact that the liquid-carrying ability of gas flow is limited and the producing liquid has a certain amount of flowing energy. In this study, the gas-liquid flow law of horizontal gas wells and wellhead drainage stability in different tubing depths were firstly studied. Then, the stability of gas drainage for different tubing depths was analyzed and confirmed. Given the disadvantages of the typical theory of critical gas flow, the mathematical model of different tubing depths for gas drainage is established for horizontal gas wells. The innovative model could take the energy of gas flow and liquid flow into account, and quantify the liquid volume which was removed. By verifying the model with the experiments, the result showed that the relative error of the model is generally less than 10%. It shows the research could provide a scientific basis for the analysis and liquid-carrying capacity for horizontal gas wells.
- Published
- 2022
7. Study on Pressure Drop Characteristics of a Two-Stage Swirler Separator
- Author
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Xingkai Zhang, Yu Lei, Zhigang Fang, Zhihui Wang, and Ruiquan Liao
- Subjects
Pressure drop ,Fuel Technology ,Materials science ,Energy Engineering and Power Technology ,Separator (oil production) ,Mechanics ,Stage (hydrology) - Abstract
Summary The vane swirler separator is widely used in the separation process of wet natural gas owing to a small volume, high efficiency, economy, and environmental protection. In addition to the separation efficiency, the pressure drop is also an important technical and operational index for evaluating the performance of the swirler. In this study, the pressure drop of a swirler vane separator was studied through laboratory experiments and numerical simulations. Through the visualization experimental study of the liquid membrane formation rule and its movement pattern, the reduced gas velocity on the pressure drop was divided into three stages. For a gas superficial velocity less than 5.69 m/s, the effect of gas superficial velocity on the pressure drop was small; for a gas superficial velocity greater than 16.57 m/s, the pressure drop increased significantly with an increase in gas flow rate, and the maximum pressure drop was generated by the two-stage swirler, downstream of which the pressure decreased precipitously. We also observed that when the liquid volume content was less than 3%, the gas superficial velocity was the dominant factor affecting the change in the pressure drop. The average relative error of the pressure drop prediction model based on the conservation of the energy law was 6.16%, which indicated a high calculation accuracy.
- Published
- 2021
8. Research on wet gas separation method based on swirl and ejection cycle technology
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Zhihui Wang, Xingkai Zhang, Ruiquan Liao, Zhenghua Wu, and Zhigang Fang
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Modeling and Simulation ,Electrical and Electronic Engineering ,Instrumentation ,Computer Science Applications - Published
- 2023
9. A Pressure-Drop Model for Oil-Gas Two-Phase Flow in Horizontal Pipes
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Joseph X. F. Ribeiro, Yuzhe Yang, Shanzhi Shi, Ruiquan Liao, Xinke Yang, Hui Zhang, and Zilong Liu
- Subjects
Pressure drop ,Materials science ,General Materials Science ,Mechanics ,Two-phase flow - Published
- 2021
10. Study on Calculation Method for Wellbore Pressure in Gas Wells with Large Liquid Production
- Author
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Yang Cheng, Ruidong Wu, Ruiquan Liao, and Zilong Liu
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Physics::Fluid Dynamics ,Process Chemistry and Technology ,gas–liquid two-phase flow ,flow pattern discrimination ,liquid holdup ,pressure drop calculation ,angle ,Reynolds number ,Chemical Engineering (miscellaneous) ,Bioengineering - Abstract
In order to solve the inaccuracy in the calculation of the wellbore pressure distribution caused by large liquid production in the Donghai gas field, the gas–liquid production conditions of the Donghai gas field were simulated with indoor experiments, and the flow patterns for different pipe diameters, different inclinations, and different flow patterns were systematically analyzed using a flow pattern discrimination method, liquid holdup calculation method, and pressure drop calculation method. Using the experimental data, the division methods for different flow patterns were screened. Finally, based on the fact that the change trend for the flow patterns was consistent, the Kaya–Sarica–Brill method was selected to establish the flow pattern discrimination formula. According to the calculation method for the Mukherjee and Brill (M–B) liquid holdup, the M–B model was re-established according to a 75 mm pipe diameter and 60 mm pipe diameter using the instantaneous liquid holdup measured in the laboratory. Through the comparison and analysis of the measured data and the calculated data for the Beggs and Brill (B–B_ pressure drop model under the same working conditions, it was found that when the B–B model was applied to different angles and different gas–liquid ratios, the error decreased with an increase in the angle and increased with a decrease in the gas–liquid ratio. After verifying the correlation of different dimensionless numbers that can characterize the gas–liquid ratio, it was considered that the introduction of the Reynolds number into the original model could greatly improve the accuracy of the calculation, so a new pressure drop calculation model was established. The new pressure drop calculation model takes into account the two parameters of the well deviation angle and gas–liquid ratio. The accuracy was greatly improved, as verified by field measurements in four wells.
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- 2022
- Full Text
- View/download PDF
11. Composition Engineering of Organic–Inorganic Perovskites Prepared in Air for Highly Efficient Energy Conversion
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Yang Li and Ruiquan Liao
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Materials science ,Chemical engineering ,Organic inorganic ,Composition (visual arts) ,Electrical and Electronic Engineering ,Electronic, Optical and Magnetic Materials ,Efficient energy use - Abstract
The global energy crisis significantly raises the research on renewable energy materials and devices both in academic and industrial community. Besides the electrochemical energy such as batteries, the solar energy is another choice to develop renewable clean energy. During the last ten years, the perovskite solar cells (PSCs) has been a hot research topic and developed fast. However, large-scale production of PSCs is still hindered by the high cost of their fabrication process, because the perovskite films are known to be sensitive to oxygen and water. Therefore, developing a composition engineering in air for PSCs with high solar energy conversion efficiency is urgently required in the field. Herein, it is found that the crystallization and morphology of CH3NH3PbI3 (MAPbI3) perovskite films prepared in air are dependent on the processing methods. The perovskite grain size becomes larger when the concentration of CH3NH3I (MAI) solution was increased from 20 mg/mL to 70 mg/mL, which is beneficial for charge carrier transport and device performance. Thanks to the optimal perovskite fabrication process, the champion PSC has been fabricated in open air and it shows a power conversion efficiency (PCE) of 14.9%. More importantly, the PSC fabricated with our method shows good stability. This work provides an effective composition engineering to fabricate PSCs in air with both high PCE and stability.
- Published
- 2020
12. Influence of Logging Instrument Drag on Temperature Distribution in Horizontal Gas Wells
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Ruiquan Liao, Xuan Zhang, and Xingkai Zhang
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Distribution (number theory) ,Drag ,Logging ,Environmental science ,General Materials Science ,Soil science - Published
- 2020
13. An Experimental Study on the Pressure Distribution in Horizontal Gas Wells
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Jinbo Liu, Hasimu Aikeremu, Ruiquan Liao, Xingkai Zhang, Dianfang Feng, Ziheng Jiang, and Xuezhang Feng
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Distribution (number theory) ,General Materials Science ,Mechanics ,Geology - Published
- 2020
14. Improving Existing Drainage and Gas Recovery Technologies: An Experimental Study on the Wellbore Flow in a Horizontal Well
- Author
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Ruiquan Liao, Xiaohong Bai, Li Li, Shan Jin, and Wei Luo
- Subjects
Wellbore ,Petroleum engineering ,Flow (psychology) ,General Materials Science ,Drainage ,Geology - Published
- 2020
15. Effect of the Inclination Angle on Slippage Loss in Gas-Liquid Two-Phase Flow
- Author
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Ruiquan Liao, Yushan Liu, Zhenhua Wu, Wei Luo, and Yubin Su
- Subjects
Materials science ,Inclination angle ,General Materials Science ,Mechanics ,Two-phase flow ,Slippage - Published
- 2020
16. A Novel Semiautomatic Interpretation Model for Impulse Neutron Oxygen Activation Time Spectrum Data
- Author
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Yong Dong, Mengxia Li, and Ruiquan Liao
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Oxygen ,Neutrons ,General Computer Science ,Article Subject ,General Mathematics ,General Neuroscience ,General Medicine ,Algorithms - Abstract
The existing interpretation models for the time spectrum of impulse neutron oxygen activation require interpreters to select the peak range or background range manually from the time spectrum curve, and there is no adaptive interpretation model that can determine the peak range or background range. In this paper, an adaptive selection rule for background segment is proposed, and a semiautomatic interpretation model is constructed by combining background segment interpretation model. Firstly, the interpretation operator selects the time spectrum curve, then the algorithm program adaptively determines the background segment according to the rules, and then calculates and displays the transit time and volume flow according to the background segment interpretation model. The processing results of the measured data show that the interpretation model in this paper not only retains the interpretation precision of the background interpretation model, but also reduces the labor intensity of the interpretation operator, realizing the semiautomatic interpretation of the time spectrum.
- Published
- 2022
- Full Text
- View/download PDF
17. Drainage Research of Different Tubing Depth in the Horizontal Gas Well Based on Laboratory Experimental Investigation and a New Liquid-Carrying Model
- Author
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Xiuwu Wang, Wenmin Ma, Wei Luo, and Ruiquan Liao
- Subjects
Control and Optimization ,Renewable Energy, Sustainability and the Environment ,liquid-carrying model ,Energy Engineering and Power Technology ,tubing depth ,Building and Construction ,gas drainage ,fluid energy ,Electrical and Electronic Engineering ,Engineering (miscellaneous) ,horizontal gas well ,Energy (miscellaneous) - Abstract
Since the structure of horizontal gas wells is more intricate than that of vertical wells, there is a lack of consistency in the form of liquid-carrying in different portions. Applying the commonly utilized liquid-carrying hypothesis of vertical gas wells into horizontal gas wells is therefore challenging. The maximum liquid volume that the gas flow could raise, the gas flow rate, and the maximum amount of energy that could be produced from a specific amount of gas flow should all be considered when determining the liquid volume that the gas flow could lift. This study is the first to integrate theoretical analysis with laboratory testing to analyze the gas–liquid flow law of drainage stability at varied tubing depths. The impact of gas drainage stability is then verified through the laboratory experiments. The novel model of various tubing depths, which is based on the energy of inflow and outflow from the horizontal well, is cleverly built. According to the study, the fluctuation is typically less when the tubing reaches the heel of the horizontal section than it is in the other sections, and the relative error of the new model, which is validated using laboratory tests, is typically less than 10%. The research showed that for horizontal gas wells with a normal structure, the gas flow and liquid discharge are most stable when the tubing reaches the heel of the horizontal section. Instead of depending exclusively on crucial liquid-carrying gas flow rates, the new model uses the combination of gas and liquid flow rates to make decisions concerning liquid loading and to quantify the liquid removal in real time, which is more realistic. The research illustrates how the study could provide a factual basis for assessing the capacity of horizontal gas wells to raise the liquid.
- Published
- 2023
18. Structure Size Optimization and Internal Flow Field Analysis of a New Jet Pump Based on the Taguchi Method and Numerical Simulation
- Author
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Zhiliang Wang, Yu Lei, Zhenhua Wu, Jian Wu, Manlai Zhang, and Ruiquan Liao
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numerical simulation ,structural size optimization ,Process Chemistry and Technology ,new jet pump ,Taguchi method ,Chemical Engineering (miscellaneous) ,Bioengineering ,comparison and analysis - Abstract
Interlayer contradiction (high-pressure oil that prevents low-pressure oil from being extracted) has always been the main factor affecting the oil-recovery efficiency of the many oil-bearing series in shale oil wells in Eastern Shandong, China. If steps to deal with interlayer contradiction are not taken, Shengli Oilfield’s oil-recovery efficiency will be significantly reduced after a certain period of exploitation. Furthermore, as the drilling depth increases, the formation-fluid supply capacity of Shengli Oilfield becomes worse and further increases the difficulty of oil recovery as well as production costs. In order to improve the oil-recovery efficiency of shale oil wells in Eastern Shandong and realize cost reductions and efficiency increases, we designed a new jet pump in this study. The pump can be used for oil recovery according to the principle of Venturi jet propulsion, as the required power fluid is not a high-pressure fluid injected from the ground, but rather high-pressure oil that is present in the formation. Through the analysis of the overall structure of the new jet pump, it was found that the pump could not only transform the existing interlayer contradiction (co-mining of high and low oil layers by utilizing interlayer contradiction), but also had the characteristics of a simple structure and low production costs. Since the structural dimensions of the jet pump and the physical characteristic parameters of the fluid have significant impacts on pump efficiency, we first analyzed the internal flow field of the jet pump by using numerical simulations and found that the throat–nozzle distance, area ratio, throat length–diameter ratio, diffuser angle, and flow ratio had the most significant impacts on pump efficiency. After obtaining the specific numerical range of the abovementioned structural parameters when the pump efficiency was as its maximum, an orthogonal array designed according to the Taguchi method was used to conduct experiments. According to a range analysis and an analysis of variance, at an unchanged flow ratio (0.3156), the new jet pump achieved the highest efficiency (31.26%) when the throat–nozzle distance was 2.62 mm, the throat length was 46 mm, the throat diameter was 6.8 mm, and the diffuser angle was 7.5°. In comparing its efficiency with that before optimization, we noticed that the efficiency was significantly improved by about 10%. These research results not only offer a new idea for the existing oil-recovery mode, but also introduce a new method for optimizing the structure of jet pumps.
- Published
- 2023
19. Study on Temperature Distribution of Perforated Horizontal Wellbore
- Author
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Liu Kai, Lijuan Wu, Xingkai Zhang, Yindi Zhang, Baocheng Shi, Ruiquan Liao, and Ziheng Jiang
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Materials science ,020209 energy ,Joule–Thomson effect ,Perforation (oil well) ,02 engineering and technology ,Mechanics ,Condensed Matter Physics ,Volumetric flow rate ,Wellbore ,Temperature gradient ,symbols.namesake ,020303 mechanical engineering & transports ,0203 mechanical engineering ,Volume (thermodynamics) ,0202 electrical engineering, electronic engineering, information engineering ,symbols ,Temperature drop - Abstract
The temperature distribution in the wellbore under different conditions was studied by using a designed horizontal well simulation experimental device. The experimental results showed that the Joule-Thomson effect was significant in perforated wellbore. When the opening mode was the same, the larger the gas flow rate, the lower the temperature in the wellbore. Furthermore, with the increase of liquid volume, the temperature drop effect decreased gradually. The more uniform the perforation distribution, the smaller the temperature change in the wellbore. With the increase of liquid volume, the influence of gas flow rate on temperature distribution decreased. The temperature gradient caused by Joule-Thomson effect decreased with the increase of wellbore holdup. At the same time, the experimental results were compared with the theoretical values. It was found that the error of the model was within 4%, which showed the reliability of predictions of the model.
- Published
- 2019
20. Experimental Investigation of a Novel Nanocomposite Particle Gel for Water Shutoff Treatment in Mature Oilfields
- Author
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Li Cheng, Yi Qin, Kejing Gao, Liyang Zhang, Jingsheng Zhou, Dingxue Zhang, Ruiquan Liao, and Zhen Li
- Subjects
General Chemical Engineering ,General Chemistry - Abstract
Conventional preformed particle gels suffer from insufficient salt tolerance and weak mechanical properties after water absorption, which reduce the water shutoff effect in mature oilfields. In this paper, a nanocomposite particle gel (NCPG) is synthesized by copolymerization of acrylamide (AM) and 2-acrylamido-2-methylpropane sulfonic acid (AMPS) using laponite RD (LPT) as a physical cross-linker and
- Published
- 2021
21. Synthesis of a Hydroxyl-Containing Corrosion Inhibitor and Its Inhibitory Performance on N80 Steel in Hydrochloric Acid Solution
- Author
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Shoumin Sun, Yang Li, Kejing Gao, Li Cheng, Xue Yang, and Ruiquan Liao
- Subjects
Mannich base ,corrosion inhibition efficiency ,adsorption mechanism ,N80 steel ,Materials Chemistry ,Surfaces and Interfaces ,Surfaces, Coatings and Films - Abstract
In the process of petroleum exploitation, in order to effectively inhibit the corrosion damage of acid to metal equipment. Mannich base corrosion inhibitors are generally added to inhibit the corrosion damage of acid. In order to enhance the solubility of Mannich base corrosion inhibitor. This paper intends to introduce hydrophilic groups to enhance the solubility of the Mannich base corrosion inhibitor. In this paper, two efficient corrosion inhibitors 3-(2-hydroxyethylamino)-1-phenylpropan-1-one (MY1) and 3-(2-aminoethylamino)-1-phenylpropan-1-one (MY2), were synthesized based on the Mannich reaction, using formaldehyde, acetophenone and ethanolamine/ethylenediamine as reaction raw materials. The corrosion inhibition performance of the inhibitor on N80 steel in 15% (mass fraction) hydrochloric acid solution was studied by means of the static weight loss method, electrochemical test and optical contact angle analysis. It could be seen from the static weight loss method that the corrosion rate in the hydrochloric acid solution before and after adding 0.7% (mass fraction) corrosion inhibitor concentration decreased from 129.39 g·m−2·h−1 to 1.45 g·m−2·h−1 and 2.79 g·m−2·h−1, respectively. The corrosion inhibition rate could reach 98%, indicating that both inhibitors had good corrosion inhibition performance, and the corrosion inhibition effect of MY1 was better than that of MY2. It was found from the electrochemical tests that the two inhibitors were mixed corrosion inhibitors mainly inhibiting the anodic reaction, and both inhibitors belonged to spontaneous adsorption, and their adsorption behaviors followed the Langmuir adsorption isotherm. In addition, the surface of N80 steel was characterized by SEM, EDS elemental mapping and contact angle measurement. The results show that a dense hydrophobic film is formed on the surface of the steel sheet after the addition of a corrosion inhibitor, which prevents corrosion.
- Published
- 2022
22. Development of a High-Strength and Adhesive Polyacrylamide Gel for Well Plugging
- Author
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Li Cheng, Yi Qin, Yubin Su, Yuan Pan, Ying Wang, Ruiquan Liao, and Zhen Li
- Subjects
General Chemical Engineering ,General Chemistry - Abstract
Addition of melamine formaldehyde (MF) as a crosslinker containing hydroxymethyl to partially hydrolyzed poly(acrylamide) (HPAM) generated covalently crosslinked
- Published
- 2021
23. Flow simulation for a horizontal well with slotted screen and ICD completions based on the wellbore–annulus–reservoir model
- Author
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Ruiquan Liao, Yang Cheng, Hongying Wang, Wei Luo, Zilong Liu, and Jing Wang
- Subjects
Completion (oil and gas wells) ,Flow (mathematics) ,Annulus (oil well) ,Mass flow ,General Engineering ,Borehole ,Inflow ,Mechanics ,Casing ,Conservation of mass ,Geology - Abstract
A flow is observed in the pipe for the horizontal section of slotted screen completion and inflow control device (ICD) completion, and an annulus flow exists between the pipe and the borehole wall. Based on the principles of mass conservation and momentum conservation, a model for variable mass flow in an oil reservoir to simulate wellbore–annulus–reservoir state in the horizontal section of slotted screen completion and ICD completion is proposed, and consequently, an accurate prediction of the production rate of a horizontal well as well as optimized design parameters for slotted screen completion and inflow control device (ICD) completion are achieved. The predicted flow profiles of the established model are confirmed using the simulation software from Computer Modeling Group Ltd. When external casing packers are not considered, findings show that the predicted production rate of slotted screen completion, which is obtained using the variable mass flow model without annulus flow modeling, is 9.51% higher than the rate obtained using the variable mass flow model with annulus flow modeling. In addition, the variable mass flow model without annulus flow modeling forecast the production of ICD completion at 70.98% higher than the variable mass flow calculation model with annulus flow modeling. Both models show that the pressure profile and flow profile of the borehole wall are more uniform in wellbore–annulus–reservoir in horizontal wells. The flow model for horizontal wells with annulus flow modeling should be established to improve the accuracy of the predicted production.
- Published
- 2021
24. Study on the erosion wear in pipe fittings
- Author
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Qin Zhang, Zhihong Zhou, Ruiquan Liao, Manlai Zhang, and Xiuwu Wang
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Particle number ,business.industry ,Drop (liquid) ,Flow (psychology) ,General Engineering ,Mechanics ,Computational fluid dynamics ,Physics::Geophysics ,Physics::Plasma Physics ,Service life ,Fluid dynamics ,Erosion ,Particle ,Astrophysics::Earth and Planetary Astrophysics ,business ,Geology - Abstract
In the pipeline system for liquid carrying particle, local erosion wear broken has become the main damage mechanism of pipe in the fracturing operations of oil-gas engineering as a large number of particles continually impact on the inner surface of pipes. Computational Fluid Dynamics simulation was performed to determine the evolutionary process of erosion wear in tubing connector, which was the weakness of pipeline system, and a new way to predict the pipeline safety was provided. Based on the Euler method, the volume fraction of the particulate phase and interphase momentum exchange were included in the liquid flow equations due to the influence of dense particle on fluid flow, and the particle trajectory were calculated in the Lagrange frame by analyzing the forces from the interaction of liquid and particle and particles collision. With the erosion damage model, the erosion rate/depth in the connector was calculated to reconstruct the mesh model of shoulder with 5 tori. Torus 1 is closest to axis while torus 5 is on the outmost wall of the connector. During the erosion event, greatest erosion and hence surface deformation occurs on tori 1 and 2, and this affects the surrounding flow and particle movement. After 10 h, there was a dramatic drop in the maximum erosion rate, which illustrated a conservative prediction for pipeline service life if the initial erosion rate was used. A physical erosion experiment was also performed to identify the weight loss and erosion characteristic of the inner surface with erosion time of 55 h. It was observed that the erosion simulations provided relative errors within 18% for erosion length and weight loss compared to the experimental values and a valid simulation method for the erosion evolution was proposed to predict the erosion life of tubing connector.
- Published
- 2021
25. Research on Distributed Optical Fiber Pipeline Micro Leakage Detection Technology Based on Recursive Least Square
- Author
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Kang Yi, Changxin Cai, and Ruiquan Liao
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History ,Computer Science Applications ,Education - Abstract
A very weak vibration signal is generated when the pipeline leaks slightly. However, the commonly used pipeline leakage detection technology cannot obtain this kind of signal normally, thus causing large positioning error. Aiming at the above problems, a pipeline micro leakage detection technology based on Recursive Least Squares distributed optical fiber is proposed. The technology utilizes a dual Mach-Zehnder interference system with high sensitivity and simple optical path structure to monitor the interference signal caused by pipeline micro leakage at all times. Then, the adaptive filter based on Recursive Least Square method is used to denoise the interference signal. On this basis, the cross-correlation algorithm is used to obtain the delay estimation of the two test signals. This article clarifies the positioning principle of the detection technology and conducts the positioning experiment of pipeline micro leakage. The experimental results show that this technology can effectively detect the weak vibration signal generated by pipeline micro leakage and greatly improve the positioning accuracy of micro leakage points. The relative error can be controlled within 1%.
- Published
- 2022
26. Study of adhesive self-degrading gel for wellbore sealing
- Author
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Ying Wang, Deji Liu, Ruiquan Liao, Guangming Zhang, Manlai Zhang, and Xiaohui Li
- Subjects
Colloid and Surface Chemistry - Published
- 2022
27. A Two-Fluid Model for High-Viscosity Upward Annular Flow in Vertical Pipes
- Author
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Ruiquan Liao, Zilong Liu, Yahaya D. Baba, Almabrok A. Almabrok, Joseph X. F. Ribeiro, Salem K. B. Ahmed, Archibong Archibong-Eso, and Aliyu M. Aliyu
- Subjects
H141 Fluid Mechanics ,Technology ,Control and Optimization ,Materials science ,Flow (psychology) ,Energy Engineering and Power Technology ,Annular flow ,02 engineering and technology ,Two-fluid model ,01 natural sciences ,010305 fluids & plasmas ,H850 Petroleum Engineering ,020401 chemical engineering ,0103 physical sciences ,0204 chemical engineering ,Electrical and Electronic Engineering ,Porosity ,Engineering (miscellaneous) ,Pressure gradient ,vertical pipes ,pressure drop ,Pressure drop ,higher viscosity ,Renewable Energy, Sustainability and the Environment ,H800 Chemical, Process and Energy Engineering ,Mechanics ,H300 Mechanical Engineering ,two-phase flow ,Friction factor ,interfacial friction factor ,Two-phase flow ,Energy (miscellaneous) - Abstract
Proper selection and application of interfacial friction factor correlations has a significant impact on prediction of key flow characteristics in gas–liquid two-phase flows. In this study, experimental investigation of gas–liquid flow in a vertical pipeline with internal diameter of 0.060 m is presented. Air and oil (with viscosities ranging from 100–200 mPa s) were used as gas and liquid phases, respectively. Superficial velocities of air ranging from 22.37 to 59.06 m/s and oil ranging from 0.05 to 0.16 m/s were used as a test matrix during the experimental campaign. The influence of estimates obtained from nine interfacial friction factor models on the accuracy of predicting pressure gradient, film thickness and gas void fraction was investigated by utilising a two-fluid model. Results obtained indicate that at liquid viscosity of 100 mPa s, the interfacial friction factor correlation proposed by Belt et al. (2009) performed best for pressure gradient prediction while the Moeck (1970) correlation provided the best prediction of pressure gradient at the liquid viscosity of 200 mPa s. In general, these results indicate that the two-fluid model can accurately predict the flow characteristics for liquid viscosities used in this study when appropriate interfacial friction factor correlations are implemented.
- Published
- 2021
28. Adaptive Determination of Time Delay in Grey Prediction Model with Time Delay
- Author
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Ruiquan Liao, Yong Dong, and Mengxia Li
- Subjects
Computer science ,Algorithm ,Information Systems - Published
- 2019
29. Prediction of Pressure Gradient in two and Three-phase Flows in Horizontal Pipes Using an Artificial Neural Network Model
- Author
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Joseph Xavier Francisco Ribeiro, Ruiquan Liao, Aliyu Musa Aliyu, and Zilong Liu
- Subjects
lcsh:T ,lcsh:TA1-2040 ,lcsh:Engineering (General). Civil engineering (General) ,Artificial neural networks, two-phase flow, three-phase flow, pressure drop, horizontal pipes ,lcsh:Technology - Abstract
Concurrent flow of gas with a mixture of oil and water in production equipment is common necessitating the need for additional investigations to gain more insight and development of more accurate correlations for prediction of flow characteristics including pressure drop. In this study, an experimental study was conducted using air-water and air-water-oil mixtures in a 0.075-m diameter pipe. Superficial gas and liquid velocities ranged from 0.03 to 0.13 m/s and 1.26 to 41.58 m/s respectively. Slug flow was the main flow pattern observed. In addition, transition to annular and annular flow were also observed. Due to the homogeneous nature of the oil-water-air mixture, the three-phase flow was evaluated as a pseudo-two-phase mixture. An Artificial Neural Network (ANN) model developed for the prediction of two- and three- phase pressure drop performed better than all models considered during the evaluation. Generally, it is found that the accuracies for pressure drop were considered adequate.
- Published
- 2019
30. Study of mechanical choked Venturi nozzles used for liquid flow controlling
- Author
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Zhao Hui, Dong Wang, Shi Baocheng, Ruiquan Liao, and Xingkai Zhang
- Subjects
Overall pressure ratio ,Materials science ,Computer simulation ,Back pressure ,Nozzle ,0207 environmental engineering ,02 engineering and technology ,Mechanics ,01 natural sciences ,Computer Science Applications ,010309 optics ,Flow control (fluid) ,Modeling and Simulation ,Venturi effect ,Cavitation ,0103 physical sciences ,Fluid dynamics ,Electrical and Electronic Engineering ,020701 environmental engineering ,Instrumentation - Abstract
Motivated by the principles of the cavitating Venturi nozzle (CVN) used for controlling fluid flow and addressing limitations of CVN, this paper proposes a mechanical choked Venturi nozzle (MCVN) which achieves choking flow via a mechanical action. The MCVN is constructed by inserting a floating springed blockage into a Venturi nozzle to imitate the bubble dynamics of CVN. First, an initial MCVN design was derived theoretically. Then, using numerical simulation and an iterative procedure, this original design was corrected to build an optimized design. Finally, the optimized design was investigated and tested both numerically and experimentally. The experimental results show that the MCVN can maintain constant flow with a flow control error of 3.8% and a maximum back pressure ratio of 0.97. Since MCVN can achieve constant flow without fluid vaporization, the pressure ratio range for applying a choking flow device is expanded and some limitations of CVN are overcome. The principles and experimental results obtained in this research can be used as a framework for the design of improved constant flow control devices for liquid flow.
- Published
- 2019
31. On the Development of a Model for the Prediction of Liquid Loading in Gas Wells with an Inclined Section
- Author
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Liu Jie, Shuangquan Liu, Li Li, Yang Cheng, Ruiquan Liao, Xiuwu Wang, and Mengna Liao
- Subjects
Section (archaeology) ,General Materials Science ,Geotechnical engineering ,Development (differential geometry) ,Geology - Published
- 2019
32. Slug Flow Characteristics in Inclined and Vertical Channels
- Author
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Xiangwei Xie, Hongying Wang, Ruiquan Liao, Zhihui Wang, Fuwei Han, and Wei Luo
- Subjects
General Materials Science ,Mechanics ,Slug flow ,Geology - Published
- 2019
33. Critical gas velocity prediction for vortex drainage gas wellsv
- Author
-
Peng Fu, Yubin Su, Ruiquan Liao, Wei Luo, and Dingxue Zhang
- Subjects
Fluid Flow and Transfer Processes ,020401 chemical engineering ,Gas velocity ,Mechanical Engineering ,02 engineering and technology ,Mechanics ,0204 chemical engineering ,Drainage ,021001 nanoscience & nanotechnology ,0210 nano-technology ,Condensed Matter Physics ,Geology ,Vortex - Published
- 2018
34. Critical liquid-carrying model for horizontal gas well
- Author
-
Xiuwu Wang, Shuangquan Liu, Li Li, Wang Xiongxiong, Jianshe Feng, and Ruiquan Liao
- Subjects
Fluid Flow and Transfer Processes ,Mechanical Engineering ,Condensed Matter Physics - Published
- 2018
35. A Two-Fluid Model for High Viscosity Upward Annular Flow in Vertical Pipes
- Author
-
Zilong Liu, Ruiquan Liao, Yahaya D. Baba, Aliyu M. Aliyu, Joseph X. F. Ribeiro, Archibong Archibong-Eso, Salem K. B. Ahmed, and Almabrok A. Almabrok
- Subjects
Friction factor ,Materials science ,Flow (psychology) ,Liquid viscosity ,Annular flow ,Two-phase flow ,Mechanics ,Two-fluid model ,Porosity ,Pressure gradient ,automotive_engineering - Abstract
Proper selection and application of interfacial friction factor correlations has a significant impact on prediction of key flow characteristics in gas–liquid two-phase flows. In this study, experimental investigation of gas–liquid flow in a vertical pipeline with internal diameter of 0.060 m is presented. Air and oil (with viscosities ranging from 100–200 mPa s) were used as gas and liquid phases, respectively. Superficial velocities of air ranging from 22.37 to 59.06 m/s and oil ranging from 0.05 to 0.16 m/s were used as a test matrix during the experimental campaign. The influence of estimates obtained from nine interfacial friction factor models on the accuracy of predicting pressure gradient, film thickness and gas void fraction was investigated by utilising a two-fluid model. Results obtained indicate that at liquid viscosity of 100 mPa s, the interfacial friction factor correlation proposed by Belt et al. (2009) performed best for pressure gradient prediction while the Moeck (1970) correlation provided the best prediction of pressure gradient at the liquid viscosity of 200 mPa s. In general, these results indicate that the two-fluid model can accurately predict the flow characteristics for liquid viscosities used in this study when appropriate interfacial friction factor correlations are implemented.
- Published
- 2021
36. Study on the Pressure Drop Variation and Prediction Model of Heavy Oil Gas-Liquid Two-Phase Flow
- Author
-
Ruiquan Liao, Congping Liu, Jie Li, Xingkai Zhang, Jiadong Liao, Xinke Yang, and Shanzhi Shi
- Subjects
Pressure drop ,QE1-996.5 ,Superficial velocity ,Materials science ,Article Subject ,Drop (liquid) ,Flow (psychology) ,Geology ,02 engineering and technology ,Mechanics ,01 natural sciences ,010305 fluids & plasmas ,Physics::Fluid Dynamics ,Viscosity ,020401 chemical engineering ,0103 physical sciences ,Range (statistics) ,General Earth and Planetary Sciences ,Two-phase flow ,0204 chemical engineering ,Total pressure - Abstract
To explore the pressure drop variation with the viscosity of heavy oil gas-liquid two-phase flow, experiments with different viscosity gas-liquid two-phase flows are carried out. The experimental results show that the total pressure drop increases with increasing liquid viscosity when the superficial gas and liquid flow rates are the same. The liquid superficial velocity is 0.52 m/s, and the superficial gas velocity is 12 m/s in the vertical and inclined pipes, as there is a negative friction pressure drop when the superficial gas and liquid velocities are small. Additionally, the increased range of the total pressure drop decreases with increasing liquid viscosity. Considering the heavy oil gas-liquid two-phase flow, a prediction model of the pressure drop in high-viscosity liquid-gas two-phase flow is established. The new model is verified by experimental data and compared with existing models. The new model has the smallest error, basically within 15%. Based on the prediction of the wellbore pressure distribution of four wells in the BeiA oilfield, the new model prediction results are closer to the measured results, and the error is the smallest. The new model can be used to predict pressure drops in high-viscosity gas-liquid two-phase flow.
- Published
- 2021
- Full Text
- View/download PDF
37. Frictional Pressure Drop and Liquid Holdup of Churn Flow in Vertical Pipes with Different Viscosities
- Author
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Yubin Su, Ming Lu, Ruiquan Liao, Zilong Zheng, and Zilong Liu
- Subjects
Pressure drop ,Work (thermodynamics) ,QE1-996.5 ,Materials science ,Gas velocity ,Article Subject ,Flow (psychology) ,Geology ,02 engineering and technology ,Mechanics ,021001 nanoscience & nanotechnology ,Viscosity ,Liquid film ,020401 chemical engineering ,General Earth and Planetary Sciences ,0204 chemical engineering ,0210 nano-technology ,Backflow ,Liquid holdup - Abstract
Churn flow commonly exists in the pipe of heavy oil, and the characteristics of churn flow should be widely understood. In this paper, we carried out air and viscous oil two-phase flow experiments, and the diameter of the test section is 60 mm. The viscosity range of the oil was 100~480 mPa·s. Based on the measured liquid holdup and pressure drop data of churn flow, it can be concluded that, due to the existence of liquid film backflow, positive and negative frictional pressure drop can be found and the change of frictional pressure drop with the superficial gas velocity is related to superficial liquid velocity. With the increase of viscosity, the change rate of frictional pressure drop increases with the increase of the superficial gas velocity. Combining our previous work and the Taitel model, we proposed a new pressure drop model for viscous oil-air two-phase churn flow in vertical pipes. By comparing the predicted values of existing models with the measured pressure drop data, the proposed model has better performance in predicting the pressure drop.
- Published
- 2021
38. Shale Gas Productivity Prediction Model Considering Time-Dependent Fracture Conductivity
- Author
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Yuan Pan, Yiwen Xu, Ze Yang, Chunli Wang, and Ruiquan Liao
- Subjects
Process Chemistry and Technology ,Chemical Engineering (miscellaneous) ,shale gas ,fracturing horizontal wells ,production prediction ,time-dependent fracture conductivity ,Bioengineering - Abstract
Conventional shale gas productivity prediction techniques consider fracture conductivity to be a fixed value, but in actual production processes, conductivity changes with time. Therefore, this paper proposed a capacity prediction method that considers time-dependent conductivity and validates its accuracy using commercial simulators. First, relevant parameters were obtained by fitting the improved long-term conductivity test, and then the shale gas seepage model was established using the EDFM method. The laboratory test results showed that the order of significance affecting the conductivity retention rate was fracturing fluid viscosity > sand concentration > fracturing fluid retention time; the calculation results of the production prediction model show that the flow and the pressure curves that corresponded to constant conductivity and variable conductivity were to some extent different. In the presence of complex fractures and natural fractures, the increase in the variable conductivity production curve was smaller than that of the constant conductivity production curve. This study provides some guidance for field production.
- Published
- 2022
39. Research on Conductivity Damage Based on Response Surface Analysis
- Author
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Yuan Pan, Ze Yang, Yuting Pan, Yiwen Xu, and Ruiquan Liao
- Subjects
Control and Optimization ,Renewable Energy, Sustainability and the Environment ,Energy Engineering and Power Technology ,Electrical and Electronic Engineering ,sandstone reservoir ,hydraulic fracturing ,conductivity damage ,laboratory test ,Engineering (miscellaneous) ,Energy (miscellaneous) - Abstract
Hydraulic fracturing is an important means of developing unconventional oil and gas layers. The fracture conductivity of tight sandstone reservoirs after fracture is affected by many factors, such as the interaction between the fracturing fluid, water, and rocks; the fracturing materials; and the construction parameters. This paper improves the experimental process of the long-term conductivity test and provides insight into conductivity prediction and optimization based on the response surface test method. The test process is conducted in the following manner: (1) inject nitrogen to evaluate the fracture conductivity before fracturing fluid damage; (2) inject fracturing fluid to simulate shut-in; and (3) inject nitrogen again to evaluate fracture conductivity after the damage ability of the fracturing fluid. The single factor test results show that the lower the sand concentration is, the higher the fracturing fluid viscosity will be, and the longer the fracturing fluid retention time is, the greater the damage to the conductivity of the fracturing fluid will be. The response surface test results show that the order of factors affecting the retention of conductivity is fracturing fluid viscosity > sand concentration > fracturing fluid retention time. There is a certain interaction between sand concentration and fluid viscosity, and there is also a certain interaction between fluid viscosity and fluid retention time, but these interactions are not significant; when the fracturing fluid retention time is longer, there will be an interaction between the sand concentration and the fracturing fluid retention time. In addition, based on the model used to optimize the fracturing construction parameters from the perspective of proppant conductivity damage, the optimal solution is when the viscosity of the fracturing fluid is 1 mPa.s, the paved-sand content is 8.49 kg/m2, and the retention time of the fracturing fluid is 10 h. The maximum retention rate of the flow conductivity is 63.19%.
- Published
- 2022
40. The Thermal Gelation Behavior and Performance Evaluation of High Molecular Weight Nonionic Polyacrylamide and Polyethyleneimine Mixtures for In-Depth Water Control in Mature Oilfields
- Author
-
Yi Qin, Ruiquan Liao, Junliang Li, and Shunshe Luo
- Subjects
Polyacrylamide ,gelation time ,Protonation ,02 engineering and technology ,macromolecular substances ,lcsh:Technology ,Article ,chemistry.chemical_compound ,020401 chemical engineering ,Sodium citrate ,Thermal ,General Materials Science ,Statistical analysis ,Polymer gel ,0204 chemical engineering ,lcsh:Microscopy ,energy_fuel_technology ,nonionic polyacrylamide ,plugging capacity ,lcsh:QC120-168.85 ,lcsh:QH201-278.5 ,Chemistry ,lcsh:T ,technology, industry, and agriculture ,021001 nanoscience & nanotechnology ,water shutoff ,Chemical engineering ,lcsh:TA1-2040 ,Formation water ,Amine gas treating ,lcsh:Descriptive and experimental mechanics ,lcsh:Electrical engineering. Electronics. Nuclear engineering ,0210 nano-technology ,lcsh:Engineering (General). Civil engineering (General) ,lcsh:TK1-9971 - Abstract
A delayed crosslinked polymer gel was developed for in-depth water control in mature oilfields. The thermal gelation behavior of nonionic polyacrylamide (NPAM) and PEI was investigated, and sodium citrate (NaCit) was selected as a new retarder to prolong the gelation time. The gelation performance of NPAM/PEI gel system can be adjusted by varying NPAM or PEI concentration, and a quadratic model is developed by statistical analysis, which predicts the gelation time of NPAM/PEI gel system. The obtained model shows high significance and good reliability, as suggested by the F-ratio of 175.16 and high adjusted R-square value (0.9732). The addition of NaCit exhibits a good delayed gelation effect on the NPAM/PEI gel system, better than that of NaCl. The decrease of the initial pH value of the gelling solution leads to the weaker gel viscosity and longer gelation time due to the protonation of amine groups on the PEI chains. Increasing temperature results in higher gel viscosity but shorter gelation time. The gel system in the presence of NaCit exhibits good compatibility with injection and formation water. A dense three-dimensional structure was observed in matured NPAM/PEI/NaCit gel, and it could keep stable below 160 °, C. The gel system could effectively reduce the permeability (>, 95%) and restricted the flow of water after matured in natural cores.
- Published
- 2020
41. Upward interfacial friction factor in gas and high-viscosity liquid flows in vertical pipes
- Author
-
Joseph X. F. Ribeiro, Zilong Liu, Aliyu M. Aliyu, and Ruiquan Liao
- Subjects
H141 Fluid Mechanics ,Materials science ,General Chemical Engineering ,H800 Chemical, Process and Energy Engineering ,education ,Multiphase flow ,02 engineering and technology ,General Chemistry ,Mechanics ,021001 nanoscience & nanotechnology ,Pipe flow ,H850 Petroleum Engineering ,Physics::Fluid Dynamics ,H300 Mechanical Engineering ,Friction factor ,020401 chemical engineering ,Two-phase flow ,0204 chemical engineering ,0210 nano-technology ,Liquid holdup - Abstract
In this study, experiments were carried out in a vertical 60-mm internal diameter pipe with air and oil (viscosities 100–330 mPa s) constituting the gas and liquid phases. Superficial air and oil velocity ranges used were 9.81–59.06 m/s and 0.024–0.165 m/s, respectively. Visual observations and change in slope of pressure drop–Vsg plot were used to identify flow pattern transition to annular flow. Using the experimental data as well as other reported data, a new correlation to predict interfacial friction factor in upward gas–viscous liquid annular flow regime was developed. Compared to the performance of 16 existing correlations using higher viscosity liquids, that of the new correlation was better. The performance of another correlation we derived for predictions at both low and higher low viscous showed good agreement with measurements. In addition, a neural network model to predict the interfacial friction factor involving both low and high viscous liquids was developed and it excellently described the experimental data.
- Published
- 2020
42. Research on estimation of optical fiber probe gas holdup based on the adaptive weighted data fusion algorithm
- Author
-
Rui Li and Ruiquan Liao
- Subjects
Fluid Flow and Transfer Processes ,020303 mechanical engineering & transports ,0203 mechanical engineering ,Computer science ,Mechanical Engineering ,Data fusion algorithms ,Gas holdup ,02 engineering and technology ,Condensed Matter Physics ,Optical fiber probe ,Algorithm - Published
- 2018
43. Study of mechano-chemical effects on the morphology of hydraulic fractures
- Author
-
Deji Liu, Ning Cheng, Shanzhi Shi, Ruiquan Liao, and Heng Zheng
- Subjects
Morphology (linguistics) ,Acid concentration ,Petroleum engineering ,02 engineering and technology ,010502 geochemistry & geophysics ,Geotechnical Engineering and Engineering Geology ,01 natural sciences ,Chemical reaction ,Chemical effects ,Stress field ,chemistry.chemical_compound ,Fuel Technology ,020401 chemical engineering ,chemistry ,Acid fracturing ,Fracture (geology) ,Carbonate ,0204 chemical engineering ,Geology ,0105 earth and related environmental sciences - Abstract
Acid fracturing is one of the main stimulation technologies in carbonate reservoir. Understanding the mechano-chemical effects on the morphology of hydraulic fractures is of great significance for acid concentration optimization. Based on the true tri-axial experiments on carbonate and CT scan and 3D reconstruction technology, the experimental results indicate that the hydraulic fracture changes from horizontal fracture to vertical fracture. In the process of acid fracturing, the stress field plays a dominant role in the formation of hydraulic fractures when the acid concentration is less than 10%, while the chemical reaction plays the dominant role when the acid concentration is more than 20%. The natural fracture system developed in carbonate reservoir provides seepage channel for acidizing reaction. With the increasing development of natural fractures, the hydraulic fractures formed in the process of acid fracturing are more complex, and the influence of acidizing reaction on acid fracturing is more serious.
- Published
- 2021
44. Wet gas measurements of long-throat Venturi Tube based on forced annular flow
- Author
-
Dong Wang, Xingkai Zhang, Lamei Huang, Ruiquan Liao, Ruomiao Liang, and Weibiao Zheng
- Subjects
Materials science ,Mass flow ,Annular flow ,Mechanics ,Flow pattern ,Flow measurement ,Computer Science Applications ,symbols.namesake ,Modeling and Simulation ,Venturi effect ,Froude number ,symbols ,Cyclone ,Wet gas ,Electrical and Electronic Engineering ,Instrumentation - Abstract
A wet gas dual-parameter measuring device composed of a cyclone and a long-throated Venturi tube is proposed to overcome the difficulty of measuring the liquid content of wet gases and reduce the error caused by the wet gas flow pattern. The flow pattern is transformed into an annular flow by a cyclone. In this study, the proposed device was compared with a traditional non-cyclone long-throat Venturi tube; furthermore, the pressure difference ratio W between the contraction and expansion sections of the long-throat Venturi tube was introduced as a parameter. Through numerical simulations, the relationship between W, the gas Froude number, over-reading, and liquid-gas mass flow ratio was analyzed, and a new wet gas flow measurement model was established. The reliability of the measurement model was verified through indoor experiments. The experimental results showed that the traditional wet gas measurement device had gas phase and liquid phase errors of ±4.5% and ±10%, respectively; on the other hand, the cyclone-based wet gas measurement device had gas phase and liquid phase errors of ±3% and ±8%, respectively. Thus, the performance of the wet gas measurement device with the cyclone was higher than that of the traditional wet gas measurement device.
- Published
- 2021
45. Microscopic mechanism of fracturing fluid imbibition in stimulated tight oil reservoir
- Author
-
Shanzhi Shi, Ning Cheng, Heng Zheng, and Ruiquan Liao
- Subjects
Work (thermodynamics) ,Materials science ,Macropore ,Tight oil ,02 engineering and technology ,Mechanics ,010502 geochemistry & geophysics ,Geotechnical Engineering and Engineering Geology ,01 natural sciences ,Surface tension ,Fracturing fluid ,Viscosity ,Fuel Technology ,020401 chemical engineering ,Imbibition ,Wetting ,0204 chemical engineering ,0105 earth and related environmental sciences - Abstract
The imbibition of fracturing fluid is of great significance to improve the development of fractured tight oil reservoirs. Understanding the micro-characteristics of fracturing fluid imbibition is necessary to improve the imbibition efficiency. In this work, the experiments of the spontaneous imbibition under simulated in-situ condition is conducted to understand the micro-characteristics of fracturing fluid imbibition, and the Nuclear magnetic resonance (NMR) and high-resolution X-rays computed tomography (CT) scanning are applied to monitor the process and the liquid distribution of spontaneous imbibition. The experimental results indicate that the spontaneous imbibition is mainly occurred in macropores at the initial stage, and the velocity of fracturing fluid is lower than that of formation water in spontaneous imbibition due to the weaker motivity generated from the lower oil-fracturing fluid interfacial tension. The fracturing fluid can promote the spontaneous imbibition due to it can decrease the kinetic energy loss when it transforms into the interfacial free energy. Thus, the oil recovery obtained from the fracturing fluid imbibition increased to 20.7% from 15.8% by formation water imbibition. The main reason accounts for it is that the wettability of fracturing fluid is stronger than that of formation water, thus can promote the whole process of spontaneous imbibition, and the lower viscosity would reduce the flow resistance at the latter stage. A higher oil-water interfacial tension (IFT) can accelerate the velocity of spontaneous imbibition at the initial stage, while a proper interfacial tension is favorable at the latter stage.
- Published
- 2021
46. Water holdup in no-slip oil-water two-phase stratified flow
- Author
-
Tiantian Fu, Ruiquan Liao, and Jie Liu
- Subjects
Fluid Flow and Transfer Processes ,Mechanical Engineering ,Oil water ,Slip (materials science) ,Mechanics ,Stratified flow ,Condensed Matter Physics ,Geology - Published
- 2017
47. Modified Mukherjee-Brill prediction model of pressure gradient for multiphase flow in wells
- Author
-
Mengxia Li, Yu Lei, Wei Luo, Yong Li, and Ruiquan Liao
- Subjects
Fluid Flow and Transfer Processes ,biology ,Mechanical Engineering ,Multiphase flow ,Brill ,Mechanics ,Condensed Matter Physics ,biology.organism_classification ,Pressure gradient ,Geology - Published
- 2017
48. Flow Pattern, Liquid Holdup and Pressure Drop of Gas-Liquid Two-Phase Flow with Different Liquid Viscosities
- Author
-
Ruiquan Liao, Zilong Liu, Xiaoya Feng, Yubin Su, and Yindi Zhang
- Subjects
Pressure drop ,Viscosity ,Materials science ,Closure (computer programming) ,Flow (psychology) ,Empirical modelling ,Two-phase flow ,Mechanics ,Flow pattern ,Liquid holdup - Abstract
Heavy oil have attracted more and more attention. Experimental results show that the high viscosity gas-liquid two-phase flow behaviors are very different from the low viscosity. In this paper, experiments of oil-gas two-phase flow in vertical pipes with different viscosities (50,150,200 mPa s) were carried out in a diameter of 60 mm. The variation of flow pattern, liquid holdup and pressure drop with viscosity was analyzed, the transition flow (from slug to churn flow) was observed. Two empirical models and three mechanistic models were validated by experimental data, the performance of all five models become worse with the increase of viscosity and the performance of mechanistic models are better than that of empirical models. Future experimental and theoretical studies should focus on improve the accuracy of the closure relationships for high viscosity.
- Published
- 2019
49. Experimental study of horizontal two- and three-phase flow characteristics at low to medium liquid loading conditions
- Author
-
Wei Luo, Aliyu M. Aliyu, Joseph X. F. Ribeiro, Zilong Liu, and Ruiquan Liao
- Subjects
Fluid Flow and Transfer Processes ,Pressure drop ,Materials science ,020209 energy ,H800 Chemical, Process and Energy Engineering ,Mixing (process engineering) ,Reynolds number ,02 engineering and technology ,Mechanics ,Condensed Matter Physics ,H850 Petroleum Engineering ,Pipeline transport ,H300 Mechanical Engineering ,symbols.namesake ,020401 chemical engineering ,Flow (mathematics) ,0202 electrical engineering, electronic engineering, information engineering ,Range (statistics) ,symbols ,Two-phase flow ,0204 chemical engineering ,Stratified flow - Abstract
An experimental study is conducted using a 0.075-m ID pipe to investigate characteristics of two- and three-phase stratified flow in a horizontal pipeline. Experiments are conducted under low to medium liquid loading conditions which is common in wet-gas and long transportation pipelines. The flow characteristics investigated include flow pattern, liquid holdup and pressure drop. The experimental range covers superficial gas Reynolds numbers from 6314 to 200,734, superficial liquid Reynolds numbers from 160 to 4391 and water-cut values from 0 to 90%. Differential pressure transducers, quick closing valves and a high-speed camera are utilized to obtain the relevant data and the trends investigated. The observed flow patterns are stratified smooth, stratified wavy and stratified-annular flow. The transitions between flow patterns vary as a function of water-cut. The effect of water-cut on liquid holdup and pressure drop were relatively negligible especially at low water-cut conditions and the fine mixing of the oil-water mixture may be partially responsible for this. As a result, with the exception of flow pattern transitions, the performances of classical two-phase flow models (for the prediction of liquid holdup and pressure drop) appear unaffected when applied to air–oil–water 3-phase flows especially at high water-cuts.
- Published
- 2019
50. Experimental Study of Gas-Liquid Two-Phase Flow for High Velocity in Inclined Medium Size Tube and Verification of Pressure Calculation Methods
- Author
-
Yong Li, Zilong Liu, Junliang Li, Qinghua Wang, Ruiquan Liao, and Wei Luo
- Subjects
Fluid Flow and Transfer Processes ,Engineering drawing ,Materials science ,Mechanical Engineering ,High velocity ,02 engineering and technology ,Mechanics ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Calculation methods ,020401 chemical engineering ,Tube (fluid conveyance) ,Two-phase flow ,0204 chemical engineering ,0210 nano-technology - Published
- 2016
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