A multi-mechanism numerical simulation model for CO_(2)-EOR and storage in fractured shale oil reservoirs

作     者：Yuan-Zheng Wang Ren-Yi Cao Zhi-Hao Jia Bin-Yu Wang Ming Ma Lin-Song Cheng Yuan-Zheng Wang;Ren-Yi Cao;Zhi-Hao Jia;Bin-Yu Wang;Ming Ma;Lin-Song Cheng

作者机构：College of Petroleum EngineeringChina University of Petroleum(Beijing)Beijing102249China John&Willie Leone Department of Energy&Mineral EngineeringThe Pennsylvania State UniversityUniversity Park16802PA.USA 

出 版 物：《Petroleum Science》 (石油科学（英文版）)

年 卷 期：2024年第21卷第3期

页      面：1814-1828页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 082002[工学-油气田开发工程] 

基　　金：supported by the National Natural Science Foundation of China(No.52174038 and No.52004307) China Petroleum Science and Technology Project-Major Project-Research on Tight Oil-Shale Oil Reservoir Engineering Methods and Key Technologies in Ordos Basin(No.ZLZX2020-02-04) Science Foundation of China University of Petroleum,Beijing(No.2462018YJRC015) 

主　　题：CO_(2)-EOR CO_(2)storage Shale oil reservoir Complex fracture model Multiple mechanisms 

摘      要：Under the policy background and advocacy of carbon capture,utilization,and storage(CCUS),CO_(2)-EOR has become a promising direction in the shale oil reservoir *** multi-scale pore structure distribution and fracture structure lead to complex multiphase flow,comprehensively considering multiple mechanisms is crucial for development and CO_(2) storage in fractured shale *** this paper,a multi-mechanism coupled model is developed by *** to the traditional Eclipse300 and MATLAB Reservoir Simulation Toolbox(MRST),this model considers the impact of pore structure on fluid phase behavior by the modified Peng—Robinson equation of state(PR-EOS),and the effect simultaneously radiate to Maxwell—Stefan(M—S)diffusion,stress sensitivity,the nano-confinement(NC)***,a modified embedded discrete fracture model(EDFM)is used to model the complex fractures,which optimizes connection types and half-transmissibility calculation approaches between non-neighboring connections(NNCs).The full implicit equation adopts the finite volume method(FVM)and Newton—Raphson iteration for discretization and *** model verification with the Eclipse300 and MRST is *** results show that the interaction between the mechanisms significantly affects the production performance and storage *** effect of molecular diffusion may be overestimated in oil-dominated(liquid-dominated)shale *** well spacing and injection gas rate are the most crucial factors affecting the production by sensitivity ***,the potential gas invasion risk is *** model provides a reliable theoretical basis for CO_(2)-EOR and sequestration in shale oil reservoirs.