川南海相深层页岩气“极限动用”开发实践  

“Extreme utilization”development of deep shale gas in southern Sichuan Basin,SW China

作　　者：马新华[1,2] 王红岩 赵群[1,2] 刘勇 周尚文[1,2] 胡志明 肖玉峰[1,2] MA Xinhua;WANG Hongyan;ZHAO Qun;LIU Yong;ZHOU Shangwen;HU Zhiming;XIAO Yufeng(PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China;National Energy Shale Gas R&D(Experiment)Center,Langfang 065007,China;Gas Field Development Management Department of PetroChina Southwest Oil and Gas Field Company,Chengdu 610051,China)

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]国家能源页岩气研发(实验)中心,河北廊坊065007 [3]中国石油西南油气田公司气田开发管理部,成都610051

出　　处：《石油勘探与开发》2022年第6期1190-1197,共8页Petroleum Exploration and Development

基　　金：中国石油前瞻性基础性项目“海相页岩气勘探开发技术研究”(2021DJ19)。

摘　　要：为高效开发川南海相深层页岩气,在“极限动用”开发理论指导下提出深层页岩气开发的基本思路和解决方案,并开展具体应用实践。针对页岩气开发影响因素多、单井产量偏低、多处于效益边际等问题,建立“透明地质体”,通过地质-工程一体化多因素评价、全生命周期持续优化,最大限度平衡生产目标与开发成本的关系。提出“极限动用”开发方案为:①计算“黄金靶体”指数,精准确定水平井钻井靶体位置,通过地球物理等多手段精准刻画页岩储集层,构建地下“透明地质体”;②优化钻完井工艺,通过降温、降密度、优化钻井液性能提升关键工具适用性,建好开发井,综合考虑地应力、裂缝等特征,有效构建“人造气藏”;③通过高效管理、建立学习曲线和优化排采制度,全生命周期提质提效,实现“极限动用”开发。实践表明,川南深层页岩气单井预测最终可采储量(EUR)比上一年提高10%~20%。To efficiently develop deep shale gas in southern Sichuan Basin,under the guidance of“extreme utilization”theory,a basic idea and solutions for deep shale gas development are put forward and applied in practice.In view of multiple influencing factors of shale gas development,low single-well production and marginal profit of wells in this region,the basic idea is to establish“transparent geological body”of the block in concern,evaluate the factors affecting shale gas development through integrated geological-engineering research and optimize the shale gas development of wells in their whole life cycle to balance the relationship between production objectives and development costs.The solutions are as follows:(1)calculate the gold target index and pinpoint the location of horizontal well drilling target,and shale reservoirs are depicted accurately by geophysical and other means to build underground transparent geological body;(2)optimize the drilling and completion process,improve the adaptability of key tools by cooling,reducing density and optimizing the performance of drilling fluid,the“man-made gas reservoir”is built by comprehensively considering the characteristics of in-situ stress and fractures after the development well is drilled;(3)through efficient management,establishment of learning curve and optimization of drainage and production regime,the development quality and efficiency of the well are improved across its whole life cycle,to fulfil“extreme utilization”development of shale gas.The practice shows that the estimated ultimate recovery of single wells in southern Sichuan Basin increase by 10%-20%than last year.

关 键 词：页岩气 “极限动用”理论 地下连通体 “黄金靶体”指数 排采优化 海相深层 

分 类 号：TE122.3[石油与天然气工程—油气勘探]