南川复杂构造带常压页岩气地质工程一体化开发实践  

Development practices of geology-engineering integration in complex structural area of Nanchuan normal pressure shale gas field

作　　者：姚红生[1] 王伟[1] 何希鹏[1] 郑永旺[1] 倪振玉 YAO Hongsheng;WANG Wei;HE Xipeng;ZHENG Yongwang;NI Zhenyu(Sinopec East China Oil&Gas Company,Nanjing,Jiangsu 210019,China)

机构地区：[1]中国石化华东油气分公司,江苏南京210019

出　　处：《油气藏评价与开发》2023年第5期537-547,F0002,共12页Petroleum Reservoir Evaluation and Development

基　　金：中国石化科技部项目“常压页岩气效益开发技术政策优化研究”(P21087-4)。

摘　　要：南川复杂构造带常压页岩气藏受多期构造运动影响,地质条件复杂加大了效益开发的难度。针对储层构造复杂导致“甜点”钻遇率低、机械钻速低和地应力复杂导致压裂改造效果差等难题,提出了适用于南川复杂构造带常压页岩气地质特点的地质工程一体化做法。围绕常压页岩气效益开发要求,充分利用物探、地质、钻完井及压裂等多学科知识进行综合研究,建立了地质与工程相互找问题促进步、地质与工程相互找依据促增效两个维度交互融合的一体化流程,形成了以物探、地质、工程一体化为核心的复杂构造带常压页岩气关键开发技术。通过现场实践应用,复杂构造带水平井机械钻速和靶窗钻遇率大幅提高,压裂成本不断下降,气井改造效果和产能持续提升,实现了南川常压页岩气的效益开发,为渝东南盆缘复杂构造区常压页岩气藏高效开发提供了可借鉴的技术和经验。The normal pressure shale gas reservoir within the complex structural belt of Nanchuan has been subject to the influences of multiple tectonic movements.The geological conditions in this region exhibit a high degree of complexity,thereby amplifying the challenges associated with efficient resource extraction.In response,an integrated geological engineering approach,tailored to the unique geological attributes of normal pressure shale gas in the intricate structural belt of Nanchuan,has been devised.This approach is aimed at mitigating challenges such as low rates of drilling in“sweet spots”,reduced mechanical drilling speeds,and suboptimal outcomes in fracturing transformations stemming from the intricacies of geological reservoir structures.In pursuit of optimizing the development of normal shale gas resources,a comprehensive investigation was undertaken,leveraging interdisciplinary knowledge spanning geophysical exploration,geology,drilling and completion,and fracturing techniques.An integrated process was established,fostering collaborative problem-solving and the mutual enrichment of geological and engineering insights.At its core,this approach emphasizes the synergy between geophysical exploration,geology,and engineering,thereby forming a pivotal development technology tailored for normal pressure shale gas reservoirs within complex structural zones.Through practical field applications,notable enhancements have been achieved.Mechanical drilling speeds and the rate of target window drilling in complex structural areas have witnessed significant improvements.Concurrently,the costs associated with fracturing operations have been consistently reduced,yielding improved gas well fracturing outcomes and enhanced productivity.These advancements collectively culminate in the efficient development of the Nanchuan normal shale gas field.Furthermore,they offer invaluable technological insights and experiential wisdom for the efficient extraction of normal shale gas reservoirs in the intricate regions of southeastern

关 键 词：复杂构造带 常压页岩气 地质工程一体化 开发实践 南川页岩气田 

分 类 号：TE319[石油与天然气工程—油气田开发工程]