Numerical Simulation Study on Temporary Well Shut-In Methods in the Development of Shale Oil Reservoirs

Field tests indicate that temporary well shut-ins may enhance oil recovery from a shale reservoir; however, there is currently no systematic research to specifically guide such detailed operations in the field, especially for design of shut-in scheme and multiple rounds shut-ins. In this study, applicability reservoirs studied, numerical model built using finite element method. order simulate production reservoir, two separate modules (i.e., Darcy’s law phase transport) were two-way coupled together. The established was validated by comparing its results with analytical Buckley–Leverett equation. paper, geological background parameters reservoir Chang-7 Member (Chenghao, China) used analyses. simulation show during can significantly affect performance. Implementing could decrease initial rate while decreasing decline rate, which conducive long-term production. After continuous 1000 days, 120 days 9.85% larger than case shut-in. Besides, an optimal time has been identified as 60 under our modeling conditions. addition, potential several also tested study; it recommended one or be performed development. When are implemented, second round after 300 summary, study reveals feasibility development provides quantitative guidance optimize these scenarios.