Lithologic Reservoirs ›› 2011, Vol. 23 ›› Issue (1): 67-73.doi: 10.3969/j.issn.1673-8926.2011.01.011

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Main controlling factors of hydrocarbon accumulation of Middle-Lower Triassic in western margin of western Sichuan Depression

SONG Xiaobo， LIU Shirong， WANG Qiongxian， DENG Daping   

  1. Guiyang Geologic Institute， Research Institute of Exploration and Development， Southwest Oil & Gas Branch， Sinopec， Guiyang 550004， China
  • Online:2011-02-20 Published:2011-02-20

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Abstract:

The western Sichuan Depression has superior geologic condition of oil and gas，where has discovered many marine gas reservoir, so it is an area with gas prospecting potentia1. But in the recent twenty years, the exploration of marine carbonate reservoir did not get breakthrough, and the exploratory extent is low. The typical structural gas reservoirs in northern, middle and southern part of western margin of western Sichuan Depression are analyzed respectively. It is proposed that the development of high quality shoal facies reservoir is the basement for hydrocarbon accumulation, and the preservation condition is the key for hydrocarbon accumulation of Middle-Lower Triassic in western margin ofwestern Sichuan Depression.

Key words: lowresistivity, saturation, movable fluid, well log interpretation

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