复杂油气藏型地下储气库气藏工程关键参数设计方法  

Design method of key parameters of gas reservoir engineering for complex reservoir type underground gas storages

作　　者：曾大乾[1] 张广权[1] 杨小松[1] 贾跃玮[1] 朱思南 王志宝 张俊法[1] 糜利栋 田洪维 秦余福 ZENG Daqian;ZHANG Guangquan;YANG Xiaosong;JIA Yuewei;ZHU Sinan;WANG Zhibao;ZHANG Junfa;MI Lidong;TIAN Hongwei;QIN Yufu(Sinopec Petroleum Exploration&Production Research Institute,Beijing 100083,China;Exploration and Development Research Institute,Sinopec Zhongyuan Oilfield Company,Puyang,Henan 457001,China;Sinopec Natural Gas Company,Zhengzhou,Henan 450046,China)

机构地区：[1]中国石化石油勘探开发研究院 [2]中国石化中原油田公司勘探开发研究院 [3]中国石化天然气分公司

出　　处：《天然气工业》2023年第10期24-33,共10页Natural Gas Industry

基　　金：中国石化科技部项目“复杂地质条件地下储气库建库及安全高效运行技术研究”(编号:P21024)。

摘　　要：我国地下储气库(以下简称储气库)建库目标包括复杂断块、强水侵、异常高压、高含油凝析气藏等复杂类型,普遍具有埋藏深、构造复杂、储层物性差、非均质性强等特点。常规气藏工程参数设计方法不适用,尤其在圈闭密封性分析、库容参数设计及注采能力评价等方面具有一定特殊性。为此,从建库目标地质特征出发,通过聚焦难点、自主创新、攻克技术瓶颈,形成了复杂断块储气库四维动态密封性评价技术,建立了异常高压储气库库容参数预测方法及水侵储气库分区带多因素耦合注采能力预测模型,论证了凝析气藏“提采—协同—储气”建库新模式和优化技术对策。研究结果表明:①通过物理模拟实验揭示了复杂断块储气库盖层疲劳损伤和断层滑移机理,实现了动态密封性指标定量化评价,为复杂断块型储气库库址筛选奠定了基础;②针对超高压裂缝型储气库岩石强应力敏感特性,建立了考虑压缩系数变化和束缚水膨胀的有效库容预测新方法,并形成了考虑周期时变和水侵影响的强水侵储气库不同区带多周期注采能力预测方法,实现了建库参数科学设计;③建立了凝析气藏提高采收率协同储气库建设新模式,明确了“提采—协同—储气”合理转换时机,形成了分阶段建库参数设计方法和井网部署对策。结论认为,形成复杂油气藏型储气库气藏工程关键参数设计系列方法有力支撑了中国石化复杂油气藏型储气库建设和运行,并对同类储气库建设具有指导作用。The underground gas storages(hereinafter referred to as UGSs)rebuilt from oil and gas reservoirs in China are characterized by great burial depth,complex structures,poor reservoir physical properties,and strong heterogeneity.The UGS construction targets in China involve complex types,such as complex fault blocks,strong water invasion,abnormal pressure,and high oil content condensate gas reservoir,so conventional gas reservoir engineering parameter design methods are not applicable,and especially there are some special requirements for trap sealing analysis,storage capacity parameter design,and injection–production capacity evaluation.Focusing on these difficulties,this paper carries out independent innovation and technological bottleneck breakthrough.Beginning with the geological characteristics of UGS construction targets,the four-dimensional dynamic sealing evaluation technology for complex fault block UGSs is developed,and the storage capacity prediction method for abnormal pressure UGSs and the zonal multi-factor coupled injection and production capacity prediction model for water invasion UGSs are established.In addition,the new condensate gasreservoir UGS construction model of"Enhanced Oil Recovery(EOR)–collaboration–gas storage"and the optimized technical strategies are demonstrated.And the following research results are obtained.First,physical simulation experiments reveal the fatigue damage and fault slip mechanisms in the cap rocks of complex fault block UGSs,so as to enable the quantitative evaluation of dynamic sealing indicators,which lays an importation foundation for the site selection of complex fault block UGSs.Second,in view that the rocks of ultra-high-pressure fractured UGSs exhibit strong stress sensitivity,a new effective storage capacity prediction method considering compressibility coefficient change and bound water expansion is established,and a multi-cycle injection and production capacity prediction method considering cycle time change and water invasion is formed for different zo

关 键 词：地下储气库 动态密封性 库容参数 注采能力 协同 复杂断块 异常高压 水侵 

分 类 号：TE972.2[石油与天然气工程—石油机械设备]