地理科学 ›› 1991, Vol. 11 ›› Issue (3): 234-243.doi: 10.13249/j.cnki.sgs.1991.03.234

• 论文 • 上一篇    下一篇

中国深埋古岩溶

李德生, 刘友元   

  1. 石油勘探开发科学研究院, 北京
  • 出版日期:1991-05-20 发布日期:1991-05-20

DEEPLY-BURIED PALEOKARST IN CHINA

Li Desheng, Liu Youyuan   

  1. Scientific Research Institute of Petroleum Exploration and Development, Beijing
  • Online:1991-05-20 Published:1991-05-20

摘要: 碳酸岩是石油与天然气的主要储集岩类之一。本文对中国深埋古岩溶发育规律及影响其发育的多种因素进行了综合论述。认为深埋古岩溶大大提高了碳酸岩储集层的孔隙性和渗透性。研究深埋古岩溶,是寻找储量丰度大、油气产能高的油气田的重要课题。

Abstract: Carbonate is one of the main petroleum reservoirs.40% of oil and 50% of gas all over the world are reserved in carbonate.In production capacity,carbonate and pore sandstone are about the same.We are now explorating oil and gas in the carbonate distributing areas including Sichuan,north China,northwest China,and near-shore continental shelf. Generally,carbonate deposited in shallow sea with stable lithological character and big thickness is widespread.On the other hand,its reservoir space,that is,the distribution of fractures and caves,is very un-uniform.The high output is dependent on the developing degree of fractures and caves in reservoir which is drilled.The developing degree of reservoir space was influenced mainly by tectonic factors in addition to unconformity and paleokarstization during the depositional break. The developing regulations of deeply-buried paleokarst in China and several factors influencing their development are comprehensively discussed.Deeply-buried paleokarst made carbonate reservoir highly pore and highly permeable.It is necessary to study deeply-buried paleokarst in order to find oil and gas fields which have high oil-gas productivity and large reserves.