南华北盆地中牟—温县区块上古生界页岩气吸附特性

doi:10.12108/yxyqc.20190308

Lithologic Reservoirs ›› 2019, Vol. 31 ›› Issue (3): 66-75.doi: 10.12108/yxyqc.20190308

• PETROLEUM GEOLOGY • Previous Articles Next Articles

Adsorption characteristics of Upper Paleozoic shale gas in ZhongmouWenxian block,South North China Basin

LI Pei^1,2,3, ZHANG Jinchuan^1,2,3, TANG Xuan^1,2,3, HUO Zhipeng^1,2,3, LI Zhen^1,2,3, LIU Junlan^1,2,3, LI Zhongming⁴

1. School of Energy Resources, China University of Geosciences, Beijing 100083, China;
2. Key Laboratory of Strategy Evaluation for Shale Gas, Ministry of Land and Resources, Beijing 100083, China;
3. Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering, Beijing 100083, China;
4. Henan Institute of Geological Survey, Zhengzhou 450000, China

Received:2018-12-03 Revised:2019-01-09 Online:2019-05-21 Published:2019-05-06

Abstract

Abstract: In order to study the characteristics of shale gas adsorption and its main controlling factors of Upper Paleozoic Shanxi-Taiyuan Formation in Zhongmou-Wenxian block of South North China Basin, a comprehensive prediction model of temperature-pressure adsorption was established based on the isothermal adsorption experiment of shale gas. The results show that:(1) Taiyuan shale with high Langmuir volume has stronger adsorption capacity compared with Shanxi shale, but Shanxi shale with higher Langmuir pressure is more conducive to shale gas desorption. (2) The buried depth and water content of shale are positively and negatively correlated with adsorbed gas content, respectively, which may be mainly controlled by temperature and pressure conditions and mass transfer in phase change. (3) The increasing temperature can lead to the decrease of adsorption capacity and Langmuir volume attenuation coefficient, reflecting temperature has a significant effect on the adsorption capacity of shale. However, the negative effect of temperature becomes weaker and weaker under deep burial conditions (>3 731 m), and the higher Langmuir pressure under deep burial condition makes the high pressure stage conducive to methane desorption in the depressurization process. Therefore, the deep shale gas (>3 500 m) in the northern part of the study area still has good exploitation potential. The research results have certain guiding significance for deep shale gas exploration.

Key words: shale, adsorbed gas, isothermal adsorption experiment, Upper Paleozoic, Zhongmou-Wenxian, South North China Basin

CLC Number:

TE122

LI Pei, ZHANG Jinchuan, TANG Xuan, HUO Zhipeng, LI Zhen, LIU Junlan, LI Zhongming. Adsorption characteristics of Upper Paleozoic shale gas in ZhongmouWenxian block,South North China Basin[J].Lithologic Reservoirs, 2019, 31(3): 66-75.

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Adsorption characteristics of Upper Paleozoic shale gas in ZhongmouWenxian block,South North China Basin

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