川南页岩气地质工程一体化实践成效与认识  

Achievement and understanding of geology and engineering integrated shale gas development practice in southern Sichuan Basin

作　　者：吴建发 曾波 黄浩勇 崔帅 赵圣贤 常程 苟其勇 Wu Jianfa;Zeng Bo;Huang Haoyong;Cui Shuai;Zhao Shengxian;Chang Cheng;Gou Qiyong(Research Institute of Shale Gas,PetroChina Southwest Oil&Gasfield Company;Sichuan Province Key Laboratory of Shale Gas Evaluation and Exploitation)

机构地区：[1]中国石油西南油气田公司页岩气研究院 [2]页岩气评价与开采四川省重点实验室

出　　处：《中国石油勘探》2024年第3期81-90,共10页China Petroleum Exploration

基　　金：中国石油天然气股份有限公司重大现场试验“深层页岩气有效开采关键技术攻关与试验”(2019F-31-01);中国石油天然气股份有限公司西南油气田科技项目“阳101井区地质工程一体化压裂优化设计及评估技术研究”(20200302-23)。

摘　　要：川南页岩气地质工程一体化技术不仅成功地解决了复杂地质条件下的工程挑战,还显著提高了单井产量和预估最终可采储量(EUR)。概述了川南页岩气地质工程一体化的基本概念、核心内涵及其技术体系,并提出了适用于不同区块不同条件的高产井培育方法。研究结果表明:(1)所形成的地质工程一体化技术体系为页岩气井全生命周期的方案设计、现场实施提供了重要的决策依据和指导,有效解决了“压窜”“套变”等瓶颈问题,泸州区块套变率降低了19%,压窜率降低了31%;(2)持续迭代更新地质工程特征认识和一体化模型,可以显著提高设计的精准性、可靠性、吻合性、有效性;(3)实施地质工程一体化高产井培育方法,可大幅提高单井产量,其中长宁区块单井平均EUR提高到1.30×10^(8)m^(3),增幅为26%;渝西区块单井平均EUR提高到1.53×10^(8)m^(3),增幅为36%。高产井培育方法已在川南页岩气的不同区块得到推广应用,并取得了显著的成效,验证了该方法在提升单井产量和经济效益方面的重要性,也可为国内外非常规油气藏的规模效益开发提供借鉴。The geology and engineering integrated technology for shale gas development in southern Sichuan Basin has not only successfully solved the engineering challenges given complex geological conditions,but also significantly increased gas production and EUR per well.The basic concept,core connotation and technical system of geology and engineering integration for shale gas development in southern Sichuan Basin are summarized,and the methods of cultivating high-yield production wells applicable for various blocks and geological conditions are proposed.The study results show that:(1)The geology and engineering integrated technical system has provided important decision-making basis and guidance for the scheme design and on-site implementation of shale gas wells in the whole life cycle,and effectively solved the bottleneck problems of“pressure channeling”and“casing deformation”,with casing deformation and pressure channeling rates in Luzhou block reduced by 19%and 31%;(2)The continuous iterative updating of geological engineering understanding and integrated model has significantly improved the accuracy,reliability,consistency and effectiveness of the design;(3)The implementation of geology and engineering integrated high-yield well cultivation method has significantly increased the production of a single well,with an average EUR of single wells in Changning block increased to 1.30×10^(8)m^(3),an increase of 26%,and that in the western Chongqing block increased to 1.53×10^(8)m^(3),an increase of 36%.This method has been applied to several shale gas blocks in southern Sichuan Basin,and remarkable results have been achieved,verifying the applicability of this method in improving production and economic benefits of a single well,which provides reference for the large scale and benefit development of unconventional oil and gas reservoirs at home and abroad.

关 键 词：川南 页岩气 地质工程一体化 长宁区块 渝西区块 泸州区块 套变 高产井 

分 类 号：TE313.8[石油与天然气工程—油气田开发工程]