大面积高丰度海相页岩气富集理论及地质评价技术进展与应用  

Enrichment theory of large area and high abundance marine shale gas and its geological evaluation technology progress and application

作　　者：王红岩[1,2] 刘德勋 蔚远江[1,2] 赵群 邱振[1,2] 董大忠 施振生[1,2] 孙莎莎 姜振学[3] 刘洪林 周尚文[1,2] 拜文华 WANG Hongyan;LIU Dexun;YU Yuanjiang;ZHAO Qun;QIU Zhen;DONG Dazhong;SHI Zhensheng;SUN Shasha;JIANG Zhenxue;LIU Honglin;ZHOU Shangwen;BAI Wenhua(PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China;National Energy Shale Gas R&D(Experiment)Center,Beijing 100083,China;Unconventional Oil and Gas Science and Technology Research Institute,China University of Petroleum(Beijing),Beijing 102249,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,北京100083 [3]中国石油大学(北京)非常规油气科学技术研究院,北京102249

出　　处：《煤田地质与勘探》2022年第3期69-81,共13页Coal Geology & Exploration

基　　金：国家科技重大专项项目(2017ZX05035);中国石油天然气股份有限公司前瞻性基础性战略性技术攻关项目(2021DJ19)。

摘　　要：海相页岩气富集特征及主控因素、地质评价及综合选区是四川盆地及周缘页岩气勘探开发研究的核心内容与突破的关键。基于勘探开发地质与地球物理多学科联合研究、现场调研、重点露头野外踏勘与取样分析、关键探井岩心观察与精细描述等方面的深入研究,阐述了大面积高丰度页岩气富集理论和地质评价技术内涵,及其在川南地区五峰–龙马溪组的最新进展、现场应用及成效。大面积高丰度页岩气富集理论进展包括:厘定了大面积、高丰度页岩气指标含义及其各自相应的地质内涵,认为硫化缺氧陆棚环境发育控制了川南富有机质沉积与富有机质页岩展布,富硅富钙海洋生物勃发控制了页岩气高有机质丰度分布,多地质事件沉积耦合作用控制富有机质页岩甜点段和高资源丰度分布;提出优质储层纹层与有机质纳米孔喉发育,条带状粉砂纹层优质页岩储层高含气性、高脆性、网状裂缝和岩性、电性、物性、地化特性、含气性、可压性“六性”最佳,建立了页岩气4个阶段过程的超压聚集、差异富集演化模式。大面积高丰度超压页岩气地质评价技术进展包括:建立了基于“层序地层、化学地层、生物地层”的黑色笔石页岩地层小层对比与评价技术,研发了5台/套页岩储层表征关键参数测试装置与分析技术,形成了页岩气储层定量表征与评价技术,“双厚度、多参数”甜点区优选评价技术,在四川盆地优选出36个有利目标区,页岩气总地质资源量10.35×10^(12)m^(3)。应用表明,该套理论与技术有效指导和支撑了中国石油页岩气资源评价、地质选区、储量发现、示范区综合评价与建设,为海相页岩气规模开发与产建部署、推动页岩气产业发展提供了重要支撑和决策依据。The enrichment characteristics and main controlling factors of marine shale gas, geological evaluation and comprehensive area selection of sweet spots are the core content and key to the breakthrough of shale gas exploration and development in Sichuan Basin and its periphery. On the basis of intensive study of geology and geophysical multidisciplinary joint research, field investigation, survey and sampling analysis of key outcrops, core observation and fine description of key exploration wells, this paper presents the enrichment theory and connotation of geological evaluation technology of large area and high abundance shale gas as well as its recent advances, field applications and effectiveness of the Wufeng Longmaxi Formations in southern Sichuan. The progress of enrichment theory of large area and high abundance shale gas includes: the indexes of large area and high abundance shale gas and their corresponding geological connotations were determined, and it was concluded that the development of sulfide anoxic shelf environment controls the distribution of organic rich sediments and organic rich shale in southern Sichuan;the booming of silicon-rich and calcium-rich marine organisms controls the distribution of high organic matter abundance of shale gas, and the sedimentary coupling of multiple geological events controls the sweet spot section and high resource abundance distribution of organic rich shale;it was proposed that the high-quality reservoir lamina and organic matter nano pore throat were developed, and the banded silty sand lamina high-quality shale reservoir had high gas bearing property, high brittleness,network fracture and the best properties of lithology, electrical property, physical property, geochemical property, gas bearing property and compressibility;the evolution model of overpressure accumulation and differential enrichment of shale gas in 4 stages were established. The progress of geological evaluation technology of large area and high abundance overpressure shale gas includes: the sma

关 键 词：海相页岩气 富集地质理论 地质评价技术 大面积 高丰度 页岩气甜点(段/区) 四川盆地及周缘 

分 类 号：TE321[石油与天然气工程—油气田开发工程] P618.13[天文地球—矿床学]