四川盆地什邡-德阳-广金地区蓬莱镇组致密气藏特征  

Tight Gas Reservoir Characteristics of Penglaizhen Formation in Shifang-Deyang-Guangjin Area of Sichuan Basin

作　　者：陈佩佩[1] 胡望水[1] 周钱山 李相明[1] 邓美洲[2] 江小菲 马江晓 

机构地区：[1]长江大学油气资源与勘探技术教育部重点实验室,地球科学学院,武汉430100 [2]中石化西南油气分公司评价所,成都610000

出　　处：《科学技术与工程》2014年第22期164-168,175,共6页Science Technology and Engineering

基　　金：国家自然科学基金项目(40872099)资助

摘　　要：什邡-德阳-广金区块主体位于四川盆地川西坳陷中段,构造位置位于成都凹陷北、北东部。综合地震、地质、钻井、测井、岩心、测试等资料。研究了蓬莱镇组致密气藏的来源、性质、分布特征、与沉积相的关系、成藏时间、排烃时间以及成藏特征。结果表明,研究区蓬莱镇组天然气主要来源于其下伏的须五段烃源岩,属于正常地温、异常高压环境下形成的不含硫化氢的优质干气;主成藏期大致为K2中期-E1早期,晚侏罗世-早白垩世末为主要排烃期。蓬莱镇组气藏可能是早期深部或中部气藏经构造运动改造后形成的气藏。Shifang-deyang-guangjin area is located in middlewestern Sichuan Foreland of Sichuan Basin,north and north east of Chengdu Sag.Based on sesmic,geology,drilling,logging,core and test data,the origin and nature of tight gas in Penglaizhen Formation,distribution characteristics,the relationship with sedimentary facies,ac-cumulation time,the time of hydrocarbon expulsion and accumulation characteristics were discussed.The results demonstrate that the gas of Penglaizhen Formation in studied area mainly comes from the source rock underlying fifth Xujiahe Formation,which are high quality dry gas without H2s formed in the normal temperature and abnormal high pressure environment.The main accumulation time was middle late cretaceous-early paleocence and the time of hydrocarbon expulsion was the end of late Jurassic-early cretaceous.The gas reservoir of Penglaizhen Formation may be deep in the early or middle gas reservoir by the tectonic movement after the formation of the gas reservoir.

关 键 词：四川盆地 什邡-德阳-广金地区 蓬莱镇组 致密气藏 成藏 

分 类 号：TE122.1[石油与天然气工程—油气勘探]