涪陵龙马溪组页岩储层应力敏感实验研究  

Research on the Stress Sensitivity Experiment of Fuling LongMaXi Shale Reservoirs

作　　者：刘华 王卫红[1,2] 陈明君 胡小虎[1,2] 郭艳东[1,2] 曾勇 Liu Hua;Wang Weihong;Chen Minjun;Hu Xiaohu;Guo Yandong;Zeng Yong(State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development,Beijing 100083;SINOPEC Petroleum Exploration and Production Research Institute,Beijing 100083;Southwest Petroleum University,Chengdu 610500;Research Institute of exploration and development in Jianghan Oilfield,Wuhan 433124)

机构地区：[1]页岩油气富集机理与有效开发国家重点实验室,北京100083 [2]中国石化石油勘探开发研究院,北京100083 [3]西南石油大学,四川成都610500 [4]中国石化江汉油田勘探开发研究院,湖北武汉433124

出　　处：《石化技术》2019年第5期155-158,共4页Petrochemical Industry Technology

基　　金：国家科技重大专项“涪陵页岩气开发示范工程”(编号:2016ZX05060-002)资助;中国石化科技部项目“川东南深层页岩气产能评价与有效开发技术政策研究”(编号:P16063)和“川南深层页岩气开发气藏工程技术研究”(编号:G5800-17-ZS-KJB006)资助

摘　　要：国内外对高压页岩储层的应力敏感报道较少。针对涪陵龙马溪组高压页岩储层条件,优选降内压的实验方法,开展了天然裂缝、压裂剪切裂缝和铺砂裂缝等3种裂缝岩样的应力敏感实验。研究结果表明:渗透率随有效应力的增加而降低,初期渗透率快速降低,后期渗透率降低幅度逐渐减小;压裂剪切裂缝页岩岩样的应力敏感程度最强,渗透率平均损害率87%;铺砂裂缝页岩岩样的应力敏感程度最弱,渗透率平均损害率47%。页岩储层渗透率与有效应力符合指数函数关系;涪陵龙马溪组页岩储层的强应力敏感性可较大幅度影响气井的稳产期和累产气量(累产气减少17%)。上述研究成果为涪陵龙马溪组页岩气井合理工作制度和开发技术政策的优化提供了理论指导。At home and abroad,the research on the stress sensitivity of ultra high pressure shale reservoirs is rarely reported. According to the Fuling LongMaXi shale reservoir geological conditions,stress sensitivity experiment method of ultra-high pressure shale reservoir is studied,preferring experimental methods of reducing the internal pressure,improving the experimental device,we simulated reservoir conditions to carry out stress sensitive experiment of natural fracture,shear fracture and sand fracturing cracks, The experimental and research results indicate that:The rock permeability of natural fracture and man- made fracture shows segment with effective stress increasing,Stress sensitivity of shear fracturing fracture stone is the strongest ,the average permeability damage rate is 87%;stress sensitivity of sand fracturing crack is the weakest,the average permeability damage rate is about 47%;the strong stress sensitivity of Fuling LongMaXi shale reservoirs can greatly affect the stable production period of gas wells and cumulative gas production. The above research has laid a foundation for the determination of reasonable production strategy and the development technical policy of shale gas.

关 键 词：涪陵 龙马溪组 页岩气 应力敏感 天然裂缝 铺砂裂缝 

分 类 号：TE311[石油与天然气工程—油气田开发工程]