石油与天然气地质 ›› 1993, Vol. 14 ›› Issue (1): 72-79.doi: 10.11743/ogg19930110

• 论文 • 上一篇    下一篇

塔里木盆地中生界油气前景探讨

唐开疆   

  1. 地质矿产部石油地质综合大队 湖北 江陵434100
  • 收稿日期:1991-04-25 修回日期:1992-10-26 出版日期:1993-03-25 发布日期:2012-01-16

MESOZOIC HYDROCARBON PROSPECTS IN TARIM BASIN

Tang Kaijiang   

  1. Comprehensive Research Institute of Pertroleum Geology, MGMR, Jiangling, Hubei
  • Received:1991-04-25 Revised:1992-10-26 Online:1993-03-25 Published:2012-01-16

PDF (PC)

347

被引次数

1

摘要：

塔里木盆地中生界具有厚度大、分布广及保存良好等特点。烃源岩以暗色泥质岩及煤系为主,夹有碳酸盐岩及油页岩,累计厚700—1200m,分布面积约38×104km2。有机质干酪根类型以ⅡB-Ⅲ型为主,部分为ⅡA-Ⅰ型;Ro值0.6%—1.2%;具有良好的生烃潜力。广泛发育河流、三角洲及湖泊相砂体,储集条件良好,各种披覆构造、挤压背斜及地层、岩性圈闭也十分发育。近年来在中生界已连续获得重大油气突破,丰硕的油气勘探成果表明中生界具有广阔的油气前景。

关键词: 塔里木盆地, 中生界, 生烃潜力, 油气前景

Abstract:

Tarim Basin,covering a range of 56×104 km2,is a Meso-Cenozoic inland basin of composite-superposed type formed on a stable landmass.The Meso-Cenozoic sediments are mainly coal-bearing clastic rocks that are distributed within an area of 38×104 km2 with the thickness of 1600m-5000m.Triassic-Jurassic source rocks are dark argillaceous rocksand coal measures intercalated with gray carbonate rocks and oil shales of 700-1200mthick.Organic matter is primarily ⅠB-Ⅲ type and partly Ⅰ-ⅡA type,vitrinite re-flectance Ro is generally 0.6%—1.2%,suggesting good hydrocarbon generating potential.As for hydrocarbon preservation condition,sandbodies of fluvial,deltiac and lacustrine facies are well developed in Mesozoic,which might form favourable preservation sedimen-tary facies in time and space;many drape structures,compression anticlines,lithologic and stratigraphic traps developed there,which prepared fine conditions for the formation of hydrocarbon pools.Thus the Mesozoic stratum in Tarim Basin has shown bright prospects in hydrocarbon exploration.This has been proved by the discovery of a number of high-productive wells such as Sha-5(K1),Sha-4(J)and Lunnan-2(T)wells.