摘要
盖层是CO_(2)封存中最重要的地质构造组成,其封闭能力的表征方法是目前研究的热点。针对盖层封闭能力评价的问题,在耦合平行毛管束与DLVO(带电表面通过液体介质的微观作用力)理论的基础上,考虑滑移效应和水膜效应,建立了盖层突破压力的理论计算方法,并与实验数据进行准确度验证。通过影响因素分析研究了突破压力随滑移长度、有效毛管半径的变化规律。结果表明:6块岩心样品的突破压力计算结果与实验数据相对误差介于0.317%~10.800%;滑移长度越小、有效毛管半径越大,突破压力越小。
Cap rock is the most important geological structure in CO_(2) storage,and the characterization method of its sealing capacity is a hot research topic at present.Aiming at the problem of evaluating the sealing ability of caprock,based on the theory of coupling parallel capillary bundle and DLVO(microscopic force of charged surface passing through liquid medium),considering slip effect and water film effect,the theoretical calculation method of caprock breakthrough pressure is established,and the accuracy is verified with experimental data.The variation of breakthrough pressure with slip length and effective capillary radius is studied by analyzing the influencing factors.The results show that the relative error between the calculated breakthrough pressure and the experimental data of six core samples is between 0.317%and 10.800%.The smaller the slip length and the larger the effective capillary radius,the smaller the breakthrough pressure.
作者
崔传智
李惊鸿
吴忠维
张团
张传宝
CUI Chuanzhi;LI Jinghong;WU Zhongwei;ZHANG Tuan;ZHANG Chuanbao(Key Laboratory of Unconventional Oil and Gas Development,Ministry of Education,China University of Petroleum(East China),Qingdao,Shandong 266580,China;Exploration and Development Research Institute,Sinopec Shengli Oilfield,Dongying,Shandong 257015,China)
出处
《油气藏评价与开发》
CSCD
2023年第3期322-329,共8页
Petroleum Reservoir Evaluation and Development
基金
国家自然科学基金“致密油藏多段压裂水平井时空耦合流动模拟及参数优化方法”(51974343)
青岛市博士后应用研究项目“致密油藏体积压裂支撑剂分布模拟与参数优化研究”(qdyy20200084)。
关键词
盖层
突破压力
滑移效应
水膜
毛管半径
cap rock
breakthrough pressure
slip effect
water film
capillary radius
