Influence of pore structure heterogeneity on channeling channels during hot water flooding in heavy oil reservoir based on CT scanning

作     者：Qing-Jun Du Hao-Yu Zheng Jian Hou Yong-Ge Liu Jian-Fang Sun Dong Zhao Qing-Jun Du;Hao-Yu Zheng;Jian Hou;Yong-Ge Liu;Jian-Fang Sun;Dong Zhao

作者机构：State Key Laboratory of Deep Oil and GasChina University of Petroleum(East China)Qingdao266580ShandongPR China School of Petroleum EngineeringChina University of Petroleum(East China)Qingdao266580ShandongPR China Laboratory for Marine Mineral ResourcesQingdao National Laboratory for Marine Science and TechnologyQingdao266237ShandongPR China Petroleum Exploration and Production Research InstituteSINOPECBeijing10083PR China 

出 版 物：《Petroleum Science》 (石油科学（英文版）)

年 卷 期：2024年第21卷第4期

页      面：2407-2419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 Key Research and Development Program of China (Grant No.2018YFA0702400) the National Natural Science Foundation of China (Grant No.52174050) the Natural Science Foundation of Shandong Province (Grant No.ZR2020ME088) the National Natural Science Foundation of Qingdao (Grant No.23-2-1-227-zyyd-jch) 

主　　题：Heavy oil Hot water flooding Pore structure Channeling channels CT scanning 

摘      要：Hot water flooding is an effective way to develop heavy oil ***,local channeling channels may form,possibly leading to a low thermal utilization efficiency and high water cut in the *** pore structure heterogeneity is an important factor in forming these *** study proposes a method that mixes quartz sand with different particle sizes to prepare weakly heterogeneous and strongly heterogeneous models through which hot water flooding experiments are *** the experiments,computer tomography(CT)scanning identifies the pore structure and micro remaining oil saturation distribution to analyze the influence of the pore structure heterogeneity on the channeling *** oil saturation reduction and average pore size are divided into three levels to quantitatively describe the relationship between the channeling channel distribution and pore structure *** zone where oil saturation reduction exceeds 20%is defined as a channeling *** scanning area is divided into 180 equally sized zones based on the CT scanning images,and threedimensional(3D)distributions of the channeling channels are *** micro remaining oil distribution patterns are proposed,and the morphology characteristics of micro remaining oil inside and outside the channeling channels are *** results show that hot water flooding is more balanced in the weakly heterogeneous model,and the oil saturation decreases by more than 20%in most zones without narrow channeling channels *** the strongly heterogeneous model,hot water flooding is unbalanced,and three narrow channeling channels of different lengths *** the weakly heterogeneous model,the oil saturation reduction is greater in zones with larger *** distribution range of the average pore size is larger in the strongly heterogeneous *** network remaining oil inside the channeling channels is less than outside the channeling channels,and the hot water convert