西藏南羌塘盆地达卓玛地区油气地质条件研究

doi:10.19388/j.zgdzdc.2020.05.03

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Abstract Previous researchers in Dazhuoma area of Southern Qiangtang Basin have found some sporadic oil and gas on the surface and collected a small amount of source rocks for analysis, but the exploration degree was generally low and they have not carried out systematic analysis of the generation, storage and cap of oil and gas. Based on the previous data, the authors in this paper have studied the characteristics of the source rocks, reservoir rocks and cap rocks in Dazhuoma area of Southern Qiangtang Basin by means of field petroleum geological survey, sample collection, indoor analysis and comparative research. The results suggest that the mudstone and shale of Adula Formation in the study area are considered as good source rocks, and the mudstone and silty mudstone of Sewa Formation are poor-medium source rocks, while Buqu Formation, Shari Formation and Suowa Formation are poor source rocks. The main reservoir rocks are the sandstone of Adula Formation and the dolomite of Buqu Formation. The cap rocks are argillaceous rocks, limestone and gypsum, and are mainly Ⅰ and Ⅱ cap rocks. Furthermore, the discovery of oil exposure shows that this basin has underwent the process of oil and gas generation, migration, gathering and losing, which builds the material foundation of oil and gas generation and the petroleum geological conditions of hydrocarbon accumulation. It is suggested that more drilling should be arranged in Darzhuoma anticline with good oil and gas storage conditions, and further deep research should be carried out to achieve oil and gas breakthrough in this area.

Key words： Tibet Southern Qiangtang Basin hydrocarbon source rocks reservoir rocks cap rocks

Received: 05 July 2019

P618.13

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	Articles by authors
	XU Lin
	LUO Shaoqiang
	TANG Hua
	HU Lin
	XIAO Jin
	SUN Rongyan

Cite this article:

XU Lin,LUO Shaoqiang,TANG Hua, et al. Study on petroleum geological conditions in Dazhuom area of Southern Qiangtang Basin of Tibet[J]. , 2020, 7(5): 16-24.

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http://journal25.magtechjournal.com/Jwk_dzdc/EN/10.19388/j.zgdzdc.2020.05.03 OR http://journal25.magtechjournal.com/Jwk_dzdc/EN/Y2020/V7/I5/16

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