Primary Geology Factors Controlling Coalbed Methane (CBM) Enrichment in Jixi Basin

Abstract:

Jixi basin is one of the important coal basins in China. To explore the gas accumulation characteristics and its geological controls, it’s important for further exploration and development of coalbed methane (CBM). The gas content of Jixi Basin is high viable from 4.78 to 11.94 m3/t, indicating high gas content in the north and west but low gas content in the south and east. The further analysis results show that the delta plain and lake are favorable sedimentary environments for coal accumulation. The Chengzihe and Muleng formation are formed in these environments. Moreover, massive magmatic intrusion heat activities and subsequent continuous subside of strata increase coal rank of the coals. In the area of Pingma reverse fault and the area with thick Muleng formation, mud seals are favorable for CBM preservation. In these areas, CBM is sealed and accumulated by hydrodynamic condition. Finally, a comprehensive evaluation model for CBM was found. Based on the evaluation model, the most favorable zone for CBM exploration is forecasted to be J idong depression.

• Periodical: Applied Mechanics and Materials (Volumes 316-317)
• Pages: 911-916
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.316-317.911
• Online since: April 2013
• Authors: Xiao Qian Guo, Da Meng Liu, Yan Bin Yao, Yi Dong Cai, Jun Qian Li
• Keywords: Coalbed Methane (CBM), Favorable Zone, Geological Control, Jixi Basin

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