川东焦石坝五峰-龙马溪组页岩气赋存机理及其主控因素

戴方尧; 郝芳; 胡海燕; 林俊峰; 黎祺

doi:10.3799/dqkx.2017.096

Volume 42 Issue 7

Jul. 2017

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Article Navigation > Earth Science > 2017 > 42(7): 1185-1194

Dai Fangyao, Hao Fang, Hu Haiyan, Lin Junfeng, Li Qi, 2017. Occurrence Mechanism and Key Controlling Factors of Wufeng-Longmaxi Shale Gas, Eastern Sichuan Basin. Earth Science, 42(7): 1185-1194. doi: 10.3799/dqkx.2017.096

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Dai Fangyao, Hao Fang, Hu Haiyan, Lin Junfeng, Li Qi, 2017. Occurrence Mechanism and Key Controlling Factors of Wufeng-Longmaxi Shale Gas, Eastern Sichuan Basin. Earth Science, 42(7): 1185-1194. doi: 10.3799/dqkx.2017.096

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Occurrence Mechanism and Key Controlling Factors of Wufeng-Longmaxi Shale Gas, Eastern Sichuan Basin

doi: 10.3799/dqkx.2017.096

Dai Fangyao^1
,,
Hao Fang^1,2,
Hu Haiyan^{3,4
,
,},
Lin Junfeng⁵,
Li Qi⁶

1.
Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences, Wuhan 430074, China
2.
China University of Petroleum, Qingdao 266580, China
3.
School of Geosciences, Yangtze University, Wuhan 430100, China
4.
Hubei Cooperative Innovation Center of Unconventional Oil and Gas, Yangtze University, Wuhan 430100, China
5.
School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China
6.
Shanghai Branch of China National Offshore Oil Corporation, Shanghai 200050, China

Received Date: 2017-05-16
Publish Date: 2017-07-15

Abstract

Abstract

Shale gas is one important kind of natural resources, which occurs in reservoir by free state and absorbing state. In order to reveal its accumulation mechanism, it is significant to study and illuminate the TOC content, main controlling factors, evolution rule of shale gas. In this study, we analyze the main controlling factor of free gas and absorbed gas in reservoir comprehensively by high temperature and high pressure adsorption isothermal experiment, FE-SEM, CO₂ adsorption experiment, N₂ adsorption experiment and mercury injection experiment. The results show that free gas is controlled by pore types and pore structure of shale, temperature and pressure in reservoir; while absorbed gas is controlled by TOC, maturity and moisture. In different stages of hydrocarbon generation, the content of free gas and absorbed gas changes regularly. Free gas occurs in the highly mature stage, and increases the process of hydrocarbon generation and the evolution of pores. It transforms into absorbed gas in the lifting stage because of the changes of temperature and pressure, which results in free gas decrease and absorbed gas increase.
- shale gas,
- free gas,
- adsorbed gas,
- Jiaoshiba area,
- Wufeng Formation-Longmaxi Formation,
- petroleum geology

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References(50)

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Occurrence Mechanism and Key Controlling Factors of Wufeng-Longmaxi Shale Gas, Eastern Sichuan Basin

doi: 10.3799/dqkx.2017.096

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