石油学报 ›› 1999, Vol. 20 ›› Issue (5): 24-26.DOI: 10.7623/syxb199905005

• 地质勘探 • 上一篇    下一篇

四川盆地下二叠统高自然伽马溶洞储层

陆正元   

  1. 成都理工学院油气藏地质及开发工程国家重点实验室
  • 收稿日期:1998-03-10 出版日期:1999-09-25 发布日期:2010-05-21
  • 作者简介:陆正元,男,1963年1月生.1994年成都理工学院毕业(博士).现为成都理工学院油气藏地质及开发工程国家重点实验室副教授.通讯处:四川成都.邮编:6100590
  • 基金资助:
    油气藏地质及开发工程国家重点实验室资助

The lower Permian cavity reservoir with high natural Gamma in Sichuan Basin

Lu Zhengyuan   

  1. Chengdu Institute of Technology
  • Received:1998-03-10 Online:1999-09-25 Published:2010-05-21

摘要: 介绍四川盆地碳酸盐岩中发现的一种高自然伽马储层新类型,下二叠统灰岩沉积后东吴运动抬升暴露形成古岩溶洞穴,洞穴中充填或富集放射性物质,从而引起测井曲线的高自然伽马异常,它指示了致密地层中缝洞储层的发育,表明东吴期古溶洞未被完全充填,具备储集和产出工业性流体的能力.

关键词: 碳酸盐岩, 高自然伽马, 溶洞, 下二叠统, 四川盆

Abstract: A new type of carbonate reservoir with high natural gamma has been discovered with the Lower Permian in Sichuan Basin.The paleokarst cavities developed in the subaerial meteoric environment were filled with the high radio-activity materials from the erosion crust or overlying strata during the Dongwu Age after the Early Permian,which resulted in the abnormal high natural gamma in the carbonate sequence.This indicated the development of the cavity reservoir in the dense limestone and also confirmed that paleokarstification played an important role in the formation of the fracture-cavity system.

Key words: carbonate, high natural gamma, paleokarst cavity, Lower Permian, Sichuan Basin