中国南方膏盐岩分布特征

doi:10.11743/ogg20060501

Abstract

Abstract:

Although accounting for a small proportion of the cap rocks all over the world,the saline deposit is of vital importance for accumulation and preservation of hydrocarbons,for it serves as seal to most of the discovered hydrocarbon reserves and is also the major cap rock in many huge and giant oil and gas fields.The close relationship between the Middle-Lower Triassic saline deposit cap rock and the distribution of natural gas in Sichuan basin suggests that distribution of saline deposit is crucial to the understanding and evaluation of the gas preserve conditions in southern China.Saline deposit forms mostly during the middle and late stages of basin development.In southern China,saline deposit cap rock are mainly developed in Middle-Lower Cambrian,Car-boniferous,Middle-Lower Triassic,and Cretaceous-Paleogene,but they are unevenly distributed and have different sealing importance.Under the influence of deposition,tectonic settings,and late destruction,the saline-deposit rock of Middle-Lower Cambrian mainly distribute in the eastern and southern parts of Sichuan basin and the northwestern part of Guizhou province;the Carboniferous saline deposit mainly distributed in the central of Hunan province,and the Cretaceous-Paleogene saline deposit mainly occurs in Jianghan basin.The Middle-Lower Triassic Saline-deposit,with the widest distribution and the biggest thickness,plays an important role in the sealing of natural gas in Sichuan basin,northern Guizhou Province,Chuxiong basin,and parts of the Middle-Lower Yangtze.

Key words: preserve condition, saline-deposit, marine deposit, hydrocarbon reservoiring, southern China

CLC Number:

TE112.2

Jin Zhijun, Long Shengxiang, Zhou Yan, Wo Yujin, Xiao Kaihua, Yang Zhiqiang, Yin Jinyin. A study on the distribution of saline-deposit in southern China[J]. Oil & Gas Geology, 2006, 27(5): 571-583,593.

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A study on the distribution of saline-deposit in southern China

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