鄂尔多斯盆地南部奥陶系气藏成藏期次  

Study on Accumulation Stage of Oodovician Gas Pool in Southern Part of Ordos Basin

作　　者：钟金银[1] 颜其彬[1] 杨辉廷[1] 王忠泉[2] 王海芳[1] 

机构地区：[1]西南石油大学资源与环境学院,四川成都610500 [2]新疆油田公司勘探开发研究院,新疆克拉玛依834000

出　　处：《新疆地质》2012年第4期447-450,共4页Xinjiang Geology

基　　金：<大型油气田及煤层气开发>国家科技重大专项(2008ZX05001);四川省重点学科建设项目(SZD0414)联合资助

摘　　要：利用地质冷热台和激光拉曼光谱仪,对鄂尔多斯盆地南部奥陶系储层流体包裹体显微荧光特征、均一化温度及包裹体成分进行分析测试,确定奥陶系气藏天然气充注时间及成藏期次。结果表明,研究区储层流体包裹体主要包括含盐水气态烃包裹体和纯气态烃包裹体两种类型。据包裹体均一化温度、包裹体气相成分分析结果,结合地区埋藏史,确定该区有两期天然气充注,对应地质时期分别为晚三叠世早期至早侏罗世末期和早白垩世末期至今,其中第二期为主要天然气成藏期。For the purpose of ascertaining the time and accumulation period of gas charging in Ordovician formation,the icrofluorometry characteristics,homogenization temperature and compostions of the fluid inclusions of the Ordovician reservoir in south part of Ordos basin were tested by using THMS 600 and Ramnor-ul000 laser spectrum analyzer.The results show that the fluid inclusions of this area include gas hydrocarbon inclusions and salt water inclusions with hydrocarbon.Based on homogenization temperature and compositions of the fluid inclusions,combined with reginal burial history, two stages of hydrocarbon-bearing fluid injection can be identified.The corresponding geological time are eaarly Late Triassic to late Early Jurassic and late Early Cretaceous to nowadys,in which the late stage accumulation plays an important part.

关 键 词：鄂尔多斯盆地 流体包裹体 均一化温度 埋藏史 成藏期次 

分 类 号：P618.130.2[天文地球—矿床学]