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With the scale development of shale gas, the importance of selecting appropriate deliquification process has become increasingly evident in maintaining well productivity and improving shale gas recovery rate. At present, the preferred deliquification process are macro-control plate method and field experience method. The existing methods can only qualitatively select the deliquification process by considering limited influencing factors, resulting in poor process implementation. Based on the results of error analysis, the Gray model was optimized to calculate the pressure distribution in the shale gas wellbore and determine the applicable pressure limit. The W.Z.B. empirical model, which fully considers the influence of wellbore inclination, is used to calculate the gas-liquid carrying situation and determine the applicable liquid carrying limit. By analyzing the technical limits of five commonly used deliquification processes in the Changning shale gas field, namely, plunger lift, optimizing pipe string, gas lift, foam drainage, and intermittent production, a quantitative optimization method for deliquification processes was established. This method was then used to obtain the optimization chart for deliquification processes in shale gas wells. This method was applied in Well Ning 209-X, where the corresponding optimization chart for deliquification processes was drawn based on the production characteristics of the gas well. By quantitatively optimizing the deliquification processes and adjusting to suitable techniques, it effectively guided the production of the gas well and improved the gas field recovery rate. [ABSTRACT FROM AUTHOR]

Directional liquid transport has broad engineering applications, and recent efforts have demonstrated the feasibility of rapid and long-distance directional transport using external driving forces, such as light, electricity, magnetism, and mechanical force. However, the externally driven mechanism limits its application in small and intelligent areas. The manufacture of the passive directional flow surfaces remains a significant challenge. In this account, we present a passive microfluidic chip with microwedge grooved channels for improved fluid directional manipulation. Benefiting from the cooperative effect of the asymmetric resistance and capillary driving force, the microwedged channel possesses the reliable functions for long-distance, anti-gravity, and continuous directional fluid transport in a microfluidic chip. To improve these properties, we optimized the structure parameters of the microwedges, resulting in a unidirectional value of up to 7.48. Furthermore, we explored the functions and applications of these microwedge arrays in intelligent and microfluidic systems. By combining different microwedge arrays, we programed that the microfluidic chips were programed with different functions, such as microfluidic logic, liquid gating, and anti-gravity capabilities, with multi-path transportation of an overall length of 537.6 mm. This research provides important guidance on functional surfaces for the design of intelligent integrated microfluidic chips and plays a significant role in promoting practical industrial applications. [ABSTRACT FROM AUTHOR]