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页岩气藏形成条件分析 预览 被引量:100

Analysis of controls on gas shale reservoirs
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摘要 美国页岩气生产时间长、资料丰富,剖析该国典型的页岩气藏有利于清晰认识页岩气成藏的主控因素。按天然气成因将页岩气藏分为热成因型、生物成因型和混合成因型,分析了美国具有代表性的典型气藏。研究表明,热成因型页岩气藏主要受页岩热成熟度控制,生物成因型页岩气藏的主控因素为地层水盐度和裂缝。根据美国页岩气生产实践,总结出有利的热成因型页岩气藏的储层特征为:TOC≥2%,厚度大于等于15m,R.介于1.1%~3%,石英含量大于等于28%。在此基础上,优选出四川盆地南部下寒武统筇竹寺组和下志留统龙马溪组2套海相页岩作为有利勘探目标,并预测湖相页岩也能形成具有商业价值的页岩气藏。 America has the longest history and the most abundant data of shale gas production.A deep understanding of the main control factors on shale gas reservoirs can be achieved through analyzing the typical gas shale reservoirs in America.Analyses of the main shale gas basins in America show that gas shale reservoirs can be classified into thermal genetic type,biogenetic type and mixed genetic type,in which the thermal genetic type is mainly controlled by thermal maturity of shale,while the major controlling factors of the biogenetic type are salinity of formation water and fractures.Practices of shale gas production in America reveal that favorable gas shale reservoirs of thermal genetic type are characterized by TOC≥2%,thickness ≥15 m,1.1%≤Ro≤3%,and quartz content ≥28%.Based on these understandings,two sets of marine shale in the Lower Cambrian Qiongzhusi formation and the Lower Silurian Longmaxi formation in the southern Sichuan basin are selected as favorable exploration targets.It is predicted that commercial gas shale reservoirs also can occur in lacustrine shale.
作者 李登华 李建忠 王社教 李新景 LI Deng-hua,LI Jian-zhong,WANG She-jiao,LI Xin-jing(PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China)
出处 《天然气工业》 EI CAS CSCD 北大核心 2009年第5期 22-26,共5页 Natural Gas Industry
基金 本文受到中国石油天然气集团公司科技攻关项目(编号:2008B-0502)的资助.在研究过程中,Daniel M.Jarvie、Frank Mango、Farzam Javadpour、Peter Liu和高瑞琪先生给予了热情指导,特致以真诚的感谢.
关键词 美国 页岩气 气藏类型 主控因素 热成熟度 储集层特征 裂缝 America,shale gas,gas reservoir type,main control factor,thermal maturity,reservoir feature,fracture
作者简介 李登华,1972年生,高级工程师,博士;现主要从事非常规油气勘探与资源评价工作。地址:(100083)北京市学院路20号910信箱油气资源规划所。电话:(010)62098666,13671363172。E—mail:ldh0709@petrochina.com.cn
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