Pore scale numerical investigation of counter-current spontaneous imbibition in multi-scaled pore networks
作者机构：China University of Petroleum(Beijing)Beijing102249China
出 版 物：《Petroleum》 (油气（英文）)
年 卷 期：2023年第9卷第4期
页 面：558-571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 Joint foundation for enterprise innovation and development of the National Natural Science Foundation of China(U19B6003-03-04-03) by the Beijing Municipal Natural Science Foundation(No.2214077)
主 题：Countercurrent spontaneous imbibition Multi-scaled pore structures Selectivity of wetting phase to pore size Lattice Boltzmann method
摘 要：The multi-scaled pore networks of shale or tight reservoirs are considerably different from the conventional sandstone *** hydraulic fracturing treatment,the spontaneous imbibition process plays an important role in the productivity of the horizontal *** the color-gradient model of Lattice Boltzmann Method(LBM)accelerated with parallel computing,we studied the countercurrent spontaneous imbibition process in two kinds of pore structures with different interlacing distributions of large and small *** effect of geometry configuration of pore arrays with different pore-scale and the capillary number Ca on the mechanism of counter-current spontaneous imbibition as well as the corresponding oil recovery factor are *** found that the wetting phase tends to invade the small pore array under small Ca in both types of geometry configurations of different pore arrays of four pore arrays *** wetting phase also tends to invade the pore array near the inlet for injecting the wetting phase no matter if it is a large pore array or small pore array except for the situation when the Ca is large to a certain *** this situation,the small pore arrays show resistance to the wetting phase,so the wetting phase doesn t invade the small pore near the inlet,but invades the large pore *** the geometry configurations of different pore arrays and Ca have a significant effect on the oil recovery *** work will help to solve the doubt about the selectivity of the multi-scaled pores of the wetting phase and the role of pores with different sizes in imbibition and oil draining in countercurrent spontaneous imbibition processes.
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