特种油气藏2024，Vol.31Issue(4)：103-108,6.DOI:10.3969/j.issn.1006-6535.2024.04.013
页岩油藏逆向渗吸的最大渗吸动用距离计算方法
Calculation Method of Maximum Imbibition Distance of Countercurrent Imbibition in Shale Reservoirs
摘要
Abstract
Imbibition is an important mechanism for fracturing development in shale reservoirs,and the maximum imbibition distance is a direct indicator for evaluating the scope of imbibition,which is of great significance for the development of shale reservoirs.In order to determine the maximum imbibition distance of shale reservoirs,a calcu-lation method of imbibition distance of countercurrent imbibition in shale reservoirs was developed according to the principles of filtration theory and numerical methods and based on the characterization of the capillary curve of shale reservoirs.The results were compared to the results of laboratory experiments so as to verify the reliability of the cal-culation method and analyze the influencing factors of the maximum imbibition distance.The research shows that the maximum imbibition distance increases linearly with the increase of permeability,but the time required to reach the maximum imbibition distance decreases exponentially;the ratio of oil/water viscosity has no effect on the maximum imbibition distance,however,the greater the viscosity of crude oil,the longer the time required to reach the maxi-mum imbibition distance;when the reservoir permeability is 0.05 mD,with the contact angle of 45 ° and the interfa-cial tension of 50 mN/m,the maximum imbibition distance is 2.2 m,taking 170 d,which takes longer time.This study provides reference for evaluating the range of imbibition distance in shale reservoirs.关键词
页岩油藏/渗吸/最大渗吸动用距离:启动压力梯度/渗透率Key words
shale reservoir/imbibition/maximum imbibition distance/threshold pressure gradient/permeability分类
能源科技引用本文复制引用
吴忠维,覃磊,崔传智,王一单,钱银,黄迎松,喻高明..页岩油藏逆向渗吸的最大渗吸动用距离计算方法[J].特种油气藏,2024,31(4):103-108,6.基金项目
国家自然科学基金面上项目"致密油藏多段压裂水平井时空耦合流动模拟及产能预测"(51974343) （51974343）
中国石化科技部课题"东营凹陷页岩油立体开发优化设计关键技术"(P23026) （P23026）
油气钻采工程湖北省重点实验室开放基金资助项目"致密油藏压裂水平井全生命周期产能预测与参数优化研究"(YQZC202307) （YQZC202307）
