Search

For low efficiency and poor high-temperature resistant performance of the conventional artificial lift systems, a new sliding vane pump and the matched lift system were designed, and the pump property study, field test and economy analysis were conducted. The redesign of flow direction reduces the pump's radial size and the design of series connection makes higher pumping pressure possible with lower revolution speed. By building pump characteristics models and doing laboratory experiment, it is found that the pump has steady hydraulic and mechanical characteristics, good no-load and heavy-load characteristics, and high system and volume efficiencies. The artificial lift system, including oil tube, sucker rod, transmission cylinder and anchor, was designed in reference to the progressive cavity pump (PCP) artificial lift system. The pump was tested in five wells and compared with other common lift equipment in energy consumption, high-temperature resistant performance and investment. The new artificial lift technique features its high efficiency, high temperature resistance, low investment and good adaptability. Key words: oil extraction pump, multistage sliding vane pump, thermal production well, high-temperature lift, artificial lift

The steam injection technology of horizontal wells has become an important heavy oil reservoir production technology. Due to the large length of horizontal section and reservoir heterogeneity, the actual steam distribution effect was poor. In this paper. Fluent was used to simulate reservoir temperature changes and reservoir steam absorption capacity under different steam. injection well structures. A three-dimensional material model experiment platform for horizontal well steam distribution was designed. the temperature field changes in reservoirs of different pipe strings under homogeneous reservoirs was analyzed. The results showed that the reservoir temperature and segmented steam absorption amount obtained by uniform perforation string decreased gradually from the heel end to the toe end of injection well. The reservoir temperature and segmented steam absorption amount were uniform by infilling the perforation of toe end. The temperature field development of slit pipe and uniform perforation pipe string mainly focused on the heel end of steam injection well, while the toe end developed slowly or even not. After infilling the perforation of toe end, and the temperature field was basically parallel to the steam injection well to advance equably.. then the uniform steam distribution was realized, which is corresponding to the numerical simulation results. [ABSTRACT FROM AUTHOR]

Aiming at the problem of bad odor appearing in some thermal recovery wells of Shengli oilfield, which affects the health of the people around them and the exploitation of heavy oil resources, the main components of bad odor were identified as methyl mercaptan and ethyl mercaptan. According to the production characteristics of oil wells, two odor additives suitable for surface pipeline and wellbore additives were developed, whose sulfur capacity and desulfurization reaction rate of the additives were also investigated. In view of the bad odor problem of a thermal recovery well, the experiments of adding chemicals to surface pipelines and wellbore were carried out comparatively. The results showed that the latter showed better economy. Field treatment was carried out in 7 wells in a block of Shengli oilfield, and the odor concentration was reduced from 150-3300 mg/m3 to below 20 mg/m3, which met the safety production requirements of oil wells and supported the safe production of thermal recovery wells. [ABSTRACT FROM AUTHOR]

Copyright of Science Technology & Industry / Keji he Chanye is the property of Chinese Society of Technology Economics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The recovery technology of multiple thermal fluids is a progressive multiple-effect one in thermal production wells, but the corrosion to the downhole system by this technology is more serious than heavy oil thermal recovery technologies. In this paper, five materials of TP100, 3Cr, N80, 316L metal nets, and 434 metal cotton were chosen, which constitute membrane & composite screens, to simulate the on-site injection & production conditions. The corrosion tests were carried out and the corrosion rates were predicted. Based on the results, the proposals for screen selecting and screen anticorrosion in the production of multiple thermal fluids wells were proposed. [ABSTRACT FROM AUTHOR]

Copyright of Oil Drilling & Production Technology / Shiyou Zuancai Gongyi is the property of Shiyou Zuancai Gongyi Bianjibu and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Natural Gas Industry is the property of Natural Gas Industry Journal Agency and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of China University of Petroleum is the property of China University of Petroleum and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Natural Gas & Oil is the property of Editorial Department of Natural Gas & Oil and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Natural Gas & Oil is the property of Editorial Department of Natural Gas & Oil and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Petrochemical Universities / Shiyou Huagong Gaodeng Xuexiao Xuebao is the property of Journal Editorial Department Of Liaoning Shihua University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Oil Drilling & Production Technology / Shiyou Zuancai Gongyi is the property of Shiyou Zuancai Gongyi Bianjibu and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Natural Gas Industry is the property of Natural Gas Industry Journal Agency and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Oil Drilling & Production Technology / Shiyou Zuancai Gongyi is the property of Shiyou Zuancai Gongyi Bianjibu and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Experimental Technology & Management is the property of Experimental Technology & Management Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

On the basis of questionnaire survey, spot investigation and data submitted by enterprises, using the bottom-up method combined industrial pollution sources with road pollution sources, the fine scale refined emission inventory of air pollutants was developed for Haicang industrial zone in 2016. The results show the emission of air pollutants from Haicang industrial sources accounted for a large proportion of Xiamen's total industrial emission, which was arranged from large to small as CO, NOx, VOCs, PM10, PM2.5, SO2, BC, NH3 and OC, with corresponding values of 7 381.62, 5 511.79, 2 606.01, 908.19, 707.16, 659.05, 51.06, 39.78 and 4.81 t, respectively. Emission from thermal production and power supply industry was the most important emission source of CO, NOx, SO2 and NH3, and non-ferrous metal smelting was the major emission source of PM10 and PM2.5. However, VOCs, BC and OC emissions mainly came from chemical raw materials and products industry. Vehicle exhaust emission in industrial areas should not be ignored, which accounted for 20.10% of NOx and 35.30% of VOCs emitted from industrial pollution sources, respectively. Contribution rate and spatial distribution of air pollutants in Haicang industrial zone illustrated that the port industrial zones and other industrial zones in the southeast contribute more air pollutants than other zones. Therefore, Haicang industrial zone is the most important area in the control of Xiamen's industrial pollutants, further more the industrial zones located in the southeast of Haicang should be considered at first. [ABSTRACT FROM AUTHOR]

Copyright of China Petroleum Machinery is the property of China Petroleum Machinery Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Natural Resources / Ziran Ziyuan Xuebao is the property of Journal of Natural Resources and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Petroleum Machinery is the property of China Petroleum Machinery Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Drilling Fluid & Completion Fluid is the property of Drilling Fluid & Completion Fluid Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Coal Geology & Exploration is the property of Xian Research Institute of China Coal Research Institute and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Biomass has been the only renewable energy that can be directly converted into fuel. The full utilization of biomass can effectively alleviate energy needs in an eco-friendly way. It is also an important path for China to achieve the goal of "carbon neutrality". Therefore, this study aims to focus mainly on the general goal of clean energy production and high-value utilization for straw-based biomass resources in recent years. A systematic analysis was made to evaluate the comprehensive utilization technology and mode of producing gas, liquid, and solid clean energy in the biological or thermo-chemical way. The development status and research progress were concentrated upon the anaerobic digestion for biogas, hydrothermal catalysis for alcohol and hydrocarbon fuel, pyrolysis liquefaction and bio-oil upgrading, and solid fuel production. Particularly, an attempt was addressed on the prospect of biogas, liquid fuel, and solid fuel. More importantly, no matter what biomass conversion technology was adopted, biomass resources utilization should be comprehensive and of high value. Correspondingly, the large-scale application required at least three basic elements. The first was the scale collection and disposal of biomass raw materials at a low cost. The second was the efficient and stable transformation, as well as quality improvement technology. The last was that the terminal fuel products needed to connect smoothly with the current application. Among them, anaerobic digestion for biogas presented the highest level of industrialization in recent years, due mainly to effectively solving raw materials collection in large breeding farms. It infers that the anaerobic digestion and biogas purification technology were relatively mature during this time. As such, biogas was directly used as a source of fuel, power, and thermal production. By contrast, hydrothermal catalysis for alcohol and hydrocarbon fuel, together with pyrolysis liquefaction for bio-oil was relatively difficult to connect with the current application, due mainly to the high conversion cost, difficult product separation, low-quality improvement efficiency, and unstable products. Therefore, the large-scale development level of the two technologies was relatively low during this time. Nevertheless, the technology of biomass preparation was relatively mature for solid fuels. The research and development of supporting stoves also effectively implemented the application of molding fuel. But the biggest difficulty in the scale application lay in the collection and storage of raw materials. Finally, the development prospects were proposed for the biomass conversion technologies. In terms of biogas, the anaerobic digestion was enhanced by multi-ingredients and bio-strengthen to improve biogas production efficiency. A precise control system should be established for the high concentration anaerobic digestion for better stability. Particularly, the comprehensive utilization of biogas slurry was carried out to realize the nutrient recycling, and biological organic fertilizer, or carbon-based fertilizer for nitrogen and carbon fixation, with emphasis on the efficiency of desulfurization and decarbonization. In terms of liquid fuel, the unpolluted depolymerization can be explored from lignocellulose to platform compounds, especially how to realize the efficient separation and quality improvement of platform compounds. During the quality upgrading process, the multi-step reaction combined catalyzer can be used to shorten the process and improve the reaction efficiency. In addition, the efficient conversion of biomass resources into fuel, chemicals, and materials should be developed synchronously for higher-value products. In terms of solid fuel, the heat transfer and bonding mechanism of torrefaction straw should be studied during the molding process, further to realize the low energy consumption and high quality. New efficient molding and combustion equipment needed to be improved the reliability of solid fuel production, particularly on the standardization, series, and package of torrefaction, molding, and combustion equipment. Consequently, the standard production of biomass collection, storage, and combustion should be improved to form biomass solid fuel industry chain from collection, storage, transportation, molding, and distribution. This research can provide a strong reference for the efficient preparation of clean energy and high-value utilization in rural biomass. [ABSTRACT FROM AUTHOR]

Copyright of Electric Power Automation Equipment / Dianli Zidonghua Shebei is the property of Electric Power Automation Equipment Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Drilling Fluid & Completion Fluid is the property of Drilling Fluid & Completion Fluid Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Natural Gas Industry is the property of Natural Gas Industry Journal Agency and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Special Oil & Gas Reservoirs is the property of Special Oil & Gas Reservoirs Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Drilling Fluid & Completion Fluid is the property of Drilling Fluid & Completion Fluid Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Drilling Fluid & Completion Fluid is the property of Drilling Fluid & Completion Fluid Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Coal Geology & Exploration is the property of Xian Research Institute of China Coal Research Institute and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The even steam injection string for horizontal well can realize even steaming in long horizontal section of horizontal well for thermal production heavy oil and improve steam injection quality. However, compared with the often used Ø73 mm tubing, the conventional even steam injection string is larger in outside diameter, so there are a number ofvariable diameter on the whole string and hence the string is hard to retrieve; in addition, the steam distribution valve is directly opposite the screen tube, so there exists the risk of screen washout while stream injection. For this reason, an easy-to-retrieve, anti-sand burial even steam injection string for horizontal well is developed, which is composed of ball-like safety release joint, small diameter lateral steam distribution valve and small diameter check valve, etc. The steam comes out of distribution valve on side orifices, so avoiding the risk of screen washout; the outside diameter of the whole string is small without obvious diameter varieties, which reduces the risk of being unable to retrieve the string due to sand burial. The string is equipped with safe connections, so when the string is buried, the release can be realized to retrieve the upper tubing and then the lower tubing shall be fished. This technology enjoys a favorable prospect and promotional value in heavy oil horizontal wells with severe sand production and screen completion. [ABSTRACT FROM AUTHOR]

For the phenomenon of the uneven drying of the current Francis grain dryer and the poor quality after drying, CFD technology was used to construct different models of drying sections according to the design scheme, and the different models were meshed and imported into Fluent simulation software for simulation analysis. Through the simulation results, it can be seen that the pressure, temperature, and wind speed uniformity coefficients of the original model are 3.09%, 7.38% and, 51.59%, respectively, and the pressure, temperature, and wind speed uniformity coefficients of the new model obtained after the optimization and design of the model are 3.78%, 8.18%, and 47.47%, respectively. The new model has more uniform flow field distribution and fewer drying dead zones in the drying section, thereby improving the quality of grain after drying in the dryer, and verifying the accuracy of the simulation through experiments. The study provides a reference for optimization and design of similar structures. [ABSTRACT FROM AUTHOR]

Copyright of Coal Geology & Exploration is the property of Xian Research Institute of China Coal Research Institute and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Packaging & Food Machinery is the property of Packaging & Food Machinery Magazine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Packaging & Food Machinery is the property of Packaging & Food Machinery Magazine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Study on Optical Communications / Guangtongxin Yanjiu is the property of Study on Optical Communications Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Drilling Fluid & Completion Fluid is the property of Drilling Fluid & Completion Fluid Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Petroleum Geology & Recovery Efficiency is the property of Petroleum Geology & Recovery Efficiency and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of High Pressure Physics is the property of Chinese Journal of High Pressure Physics Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Drilling Fluid & Completion Fluid is the property of Drilling Fluid & Completion Fluid Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Packaging & Food Machinery is the property of Packaging & Food Machinery Magazine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Special Oil & Gas Reservoirs is the property of Special Oil & Gas Reservoirs Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

For the technique of injecting water and extracting oil in one well and the technique of paraffin cleaning and prevention in thermal production well, a large bore and high strength cable-through packer is developed. Its bore size is 90.1 mm, expanding the annulus injecting and extracting channel. The packer body is made of 42 CrMo high strength alloy, making maximum hanging load reach 1250 kN. The packer has been applied in seven wells in offshore fields, with one-off success in setting and verification, indicating that it is suitable for field process. [ABSTRACT FROM AUTHOR]

Copyright of Special Oil & Gas Reservoirs is the property of Special Oil & Gas Reservoirs Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Petrochemical Universities / Shiyou Huagong Gaodeng Xuexiao Xuebao is the property of Journal Editorial Department Of Liaoning Shihua University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Oil Drilling & Production Technology / Shiyou Zuancai Gongyi is the property of Shiyou Zuancai Gongyi Bianjibu and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of China University of Petroleum is the property of China University of Petroleum and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Petroleum Geology & Recovery Efficiency is the property of Petroleum Geology & Recovery Efficiency and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Atomic & Molecular Physics (1000-0364) is the property of Journal of Atomic & Molecular Physics Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The "Implementation Plan for Reduction of Pollution and Carbon Emissions" emphasizes the need to explore mechanisms for pollution and carbon emission reductions, strengthen efforts for synergistic reduction, and accelerate the green and low-carbon development in different types of cities. Thus, this study established a multi-objective optimization model for the industrial structure of the city based on green total factor productivity （GTFP）, which was applied to Jiaxing, an emerging coastal city. The results indicated an overall 8% increase in GTFP across various industries in Jiaxing from 2016 to 2019. The top three economic sectors - chemical products； electricity and thermal production and supply； and communication equipment, computers, and other electronic devices-ranked 12th, 15th, and 5th in GTFP, respectively. Conversely, industries with the top three GTFP rankings-other manufacturing products, specialized equipment, food, and tobacco-ranked 19th, 12th, and 14th in GDP, respectively. Given the mismatch between economic output and environmental benefits among different industries, deepening industrial structure adjustment and promoting synergistic pollution reduction and carbon reduction are imperative. The chemical industry （decreasing by 2%） and the electricity and thermal production and supply industry （decreasing by 1%） crucially need industrial transformation. This can be achieved by setting higher environmental thresholds, reducing the growth rate of fixed asset investment, and curbing the final consumption of these industries to enhance the efficiency of existing facilities. Meanwhile, the service industry （increasing by 5%） should be rapidly developed, while other industries can continue to grow at their current pace. The city-level industrial structure optimization model established in this study can effectively support future decision-making for the dual control of total carbon emissions and intensity, foster new-quality productivity, and promote carbon peaking and green low-carbon high-quality development in different cities.