First discovery of modern mud volcanoes in Qiangtang Basin and its petroleum geological significance

YAN Ze; FENG Xinglei; HOU Mingcai; FU Xiugen; CHEN Wenbin; TAN Zhiyuan

2018 Vol. 37, No. 6

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YAN Ze, FENG Xinglei, HOU Mingcai, FU Xiugen, CHEN Wenbin, TAN Zhiyuan. First discovery of modern mud volcanoes in Qiangtang Basin and its petroleum geological significance[J]. Geological Bulletin of China, 2018, 37(6): 1150-1156.

Citation:

YAN Ze, FENG Xinglei, HOU Mingcai, FU Xiugen, CHEN Wenbin, TAN Zhiyuan. First discovery of modern mud volcanoes in Qiangtang Basin and its petroleum geological significance[J]. Geological Bulletin of China, 2018, 37(6): 1150-1156.

First discovery of modern mud volcanoes in Qiangtang Basin and its petroleum geological significance

1.
Chengdu University of Technology, Chengdu 610059, Sichuan, China
2.
280 Institute of Nuclear Industry, Guanghan 618300, Sichuan, China
3.
Chengdu Center, China Geological Survey, Chengdu 610082, Sichuan, China

Received Date: 05 March 2018

Revised Date: 03 May 2018

Publish Date: 25 June 2018

Abstract

Abstract

For the first time the modern mud volcanoes were found in Suonahu area of Qiangtang Basin. Through collecting water samples and mud samples and analyzing water chemical ions, water soluble hydrocarbon gas, and carbon and oxygen stable isotope, this paper discusses oil and gas geological significance of modern mud volcanoes. Hydrochemical types and hydrogen and oxygen iso-topes indicate that underground reservoirs may exist in this area. The test results of water-soluble hydrocarbon gas show that the gas composition is C1~C5, mainly methane, consistent with the gas composition of the conventional gas reservoir, and the carbon iso-tope discrimination result shows that it is oil gas of pyrolysis origin. Combined with geological background of the mud volcano, it is shown that mud volcano is the product of oil and gas reservoir seepage and leakage, and hence good prospects for oil and gas explora-tion lie in well preserved and non leaking areas.
- Qiangtang Basin /
- mud volcano /
- fluid geochemical characteristics /
- oil and gas geological significance

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References

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