页岩油藏逆向渗吸的最大渗吸动用距离计算方法

doi:10.3969/j.issn.1006-6535.2024.04.013

特种油气藏 ›› 2024, Vol. 31 ›› Issue (4): 103-108.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

吴忠维^1,2, 覃磊^1,2, 崔传智³, 王一单⁴, 钱银^1,2, 黄迎松⁵, 喻高明^1,2

1.长江大学油气钻采工程湖北省重点实验室,湖北武汉 430100;
2.长江大学,湖北武汉 430100;
3.中国石油大学(华东)非常规油气开发教育部重点实验室,山东青岛 266580;
4.国家管网集团储能技术有限公司,上海 200001;
5.中国石化胜利油田分公司,山东东营 257100

收稿日期:2023-09-12 修回日期:2024-04-24 出版日期:2024-08-25 发布日期:2024-09-20
通讯作者: 崔传智(1970—),男,教授,1993年毕业于石油大学(华东)油藏工程专业,2005年毕业于中国地质大学(北京)矿产普查与勘探专业,获博士学位,现从事致密油渗流理论与开发技术、特高含水期油藏提高采收率理论与技术及油田大数据应用技术等工作。
作者简介:吴忠维(1990—),男,讲师,2013年毕业于长江大学石油工程专业,2020年毕业于中国石油大学(华东)油气田开发工程专业,获博士学位,研究方向为高含水油藏提高采收率理论与方法、致密油/页岩油渗流理论与开发技术。
基金资助:
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);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);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)

Calculation Method of Maximum Imbibition Distance of Countercurrent Imbibition in Shale Reservoirs

Wu Zhongwei^1,2, Qin Lei^1,2, Cui Chuanzhi³, Wang Yidan⁴, Qian Yin^1,2, Huang Yingsong⁵, Yu Gaoming^1,2

1. Hubei Key Laboratory of Drilling and Production Engineering for Oil and Gas,Yangtze University,Wuhan,Hubei 430100,China;
2. Yangtze University,Wuhan,Hubei 430100,China;
3. Key Laboratory of Unconventional Oil and Gas Development,Ministry of Education, China University of Petroleum (East China),Qingdao,Shandong 266580,China;
4. Energy Storage Technology Co.,Ltd.,Pipe China,Shanghai 200001,China;
5. Sinopec Shengli Oilfield Company,Dongying,Shandong 257100,China

Received:2023-09-12 Revised:2024-04-24 Online:2024-08-25 Published:2024-09-20

摘要/Abstract

摘要： 渗吸是页岩油藏压裂开发的重要机理,最大渗吸动用距离是渗吸动用范围评价的直接指标,对页岩油藏开发具有重要意义。为确定页岩油藏最大渗吸动用距离,在表征页岩油藏毛细管力曲线基础上,运用渗流理论、数值计算方法,建立了页岩油藏逆向渗吸最大渗吸动用距离计算方法,通过与室内实验结果进行对比,验证了计算方法的可靠性,同时开展了最大渗吸动用距离影响因素分析。研究表明:随着渗透率增加,最大渗吸动用距离呈线性增加,但达到最大渗吸动用距离所用时间呈指数降低;油水黏度比对最大渗吸动用距离无影响,但原油黏度越大,达到最大渗吸动用距离所需时间越长;当储层渗透率为0.05 mD、接触角为45 °、界面张力为50 mN/m时,最大渗吸动用距离为2.2 m,所需时间为170 d,用时较长。该研究可为页岩油藏渗吸动用范围评价提供借鉴。

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

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 calculation 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 calculation 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 maximum imbibition distance;when the reservoir permeability is 0.05 mD,with the contact angle of 45 ° and the interfacial 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.

Key words: shale reservoir, imbibition, maximum imbibition distance, threshold pressure gradient, permeability

中图分类号:

TE348

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.

Wu Zhongwei, Qin Lei, Cui Chuanzhi, Wang Yidan, Qian Yin, Huang Yingsong, Yu Gaoming. Calculation Method of Maximum Imbibition Distance of Countercurrent Imbibition in Shale Reservoirs[J]. Special Oil & Gas Reservoirs, 2024, 31(4): 103-108.

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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

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