摘要
塔里木盆地塔中45井揭示了以奥陶系萤石发育段为储集层的特殊油气藏类型。通过对萤石发育段的岩石学、地球化学、储集层地质学及成矿地质学的综合研究认为,萤石为低温热液成因,萤石成因与二叠纪火山活动无必然联系,而与喜马拉雅运动期盆地流体的活动有关;此类盆地流体为成矿、成藏和埋藏岩溶流体的统一体,萤石成矿、油气成藏与埋藏岩溶作用之间存在伴生关系。结合萤石的成矿条件,预测成矿流体来源的上游方向具有好的储集层发育。
A special type of petroleum reservoir characterized by Ordovician fluorite interval is found in TZ-45 Well in Tarim basin. This paper presents the researches on the fluorite-developed interval in lithology, geochemistry, reservoir geology and mineralizing geology. The comprehensive study shows that the fluorite was genetic under the epithermal environment without inevitable relations to Permian volcanic activities, but certain relations to the basinal fluid movement during the Himalayan orogeny. Since the basinal fluid was associated fluid for mineralization, petroleum accumulation and buried karstification, there exited the associated relations among the fluorite mineralization, petroleum accumulation and buried karstification. It is predicted that the upstream could be of developed reservoirs originated with the mineralizing fluid under the conditions of the fluorite mineralization.
出处
《新疆石油地质》
CAS
CSCD
2004年第5期479-482,共4页
Xinjiang Petroleum Geology
基金
国家973重点研究发展规划项目资助(编号:G1999043311)
关键词
塔里木盆地
奥陶系
萤石
储集层
油气藏
Tarim basin
fluorite
origin
thermal fluid
petroleum reservoirj
