川东北地区须家河组天然气成藏主控因素分析  

Analysis on main controlling factors of gas accumulation in Xujiahe Formation of northeast Sichuan Basin

作　　者：盘昌林[1,2] 刘树根[1] 马永生[3] 胡东风[2] 黄仁春[2] 

机构地区：[1]成都理工大学能源学院,四川成都610059 [2]中国石化勘探南方分公司研究院,四川成都610041 [3]中国石化油田事业部．北京100029

出　　处：《断块油气田》2011年第4期418-423,共6页Fault-Block Oil & Gas Field

基　　金：国家科技重大专项“碎屑岩层系大中型油气田富集规律与勘探关键技术”项目(2008ZX05002-004)

摘　　要：勘探实践证明,川东北地区须家河组具备良好的勘探潜力,特别是元坝地区已经成为中浅层天然气勘探的重点区块。文中以马路背须二、须四段岩性-构造气藏,以及元坝须二段岩性气藏、须四段构造-岩性气藏的解剖研究为基础,分析川东北地区的成藏条件和成藏主控因素等,认为川东北地区上三叠统须家河组具备形成大中型气藏(田)的条件,充足的烃源岩、良好的输导条件、适时的古隆起、圈闭发育、大面积分布的巨厚储层、优良的保存及封盖条件是控制上三叠统天然气成藏的主控因素。Exploration and research show that Xujiahe Formation has a favorable exploration potential in Northeast Sichuan Basin,particularly Yuanba Region has become the key block of middle-shallow gas exploration.Based on the integrated study of lithology-structure gas reservoir of the second member and the fourth member of Xujiahe Formation in Malubei,the lithologic gas reservoir of the second member of Xujiahe Formation and the structure-lithology gas reservoir of the fourth member of Xujiahe Formation in Yuanba,the accumulation conditions and main controlling factors of gas reservoir are analyzed in Northeast Sichuan Basin.It is believed that the forming conditions of large-middle gas reservoir have been shown in Upper Triassic Xujiahe Formation of Northeast Sichuan Basin.For the gas accumulation of Upper Triassic,main controlling factors are the abundant source rock,favorable conductivity condition,timely palaeohigh,developed trap,thick reservoir with large-area distribution,excellent reservation and seal conditions.

关 键 词：气藏解剖 成藏主控因素 天然气 须家河组 川东北地区 

分 类 号：TE122.33[石油与天然气工程—油气勘探]