Impact of Gypsolith on the Preservation and Exploration Prospect of Shale Gas in Sichuan Basin
Received date: 2015-04-28
Revised date: 2015-06-22
Online published: 2015-08-10
Based on the analysis of previous researches and drilling data,this paper interpreted the impact of gypsolith on the preservation and exploration prospect of shale gas in Sichuan Basin.Results show that the halite layer of Lower Cambrian and Triassic plays an important controlling role in tectonic deformation,resulting in different structural styles in Sichuan Basin.The formation under gypsolith tends to be overpressure because of the halite layer.Gypsolith in Sichuan Basin is one of the most important factors which controls the shale gas exploration of Longmaxi Formantion.Based on the distribution of salt layers,depth and thickness of shale,and organic geochemical characteristics,we suggest that Zigong-Yibin,Chongqing-Yongchuan,and Fuling are the favorite shale gas exploration regions in Sichuan Basin.
Key words: Shale gas; Longmaxi Formation; Gypsolith; Sichuan Basin
ZHU Zhen,YIN Hong-wei,JIA Dong,CHEN Zhu-xin,WEI Dong-tao . Impact of Gypsolith on the Preservation and Exploration Prospect of Shale Gas in Sichuan Basin[J]. Natural Gas Geoscience, 2015 , 26(8) : 1472 -1480 . DOI: 10.11764/j.issn.1672-1926.2015.08.1472
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