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Vol. 91 No. 1 pp.371–372 ACTA GEOLOGICA SINICA (English Edition) Feb. 2017 Research Advances Favorable Depth Distribution of Coalbed Methane Enrichment and High Yield Zone in Slope Areas 1, 2, * 2 2 2 2 SONG Yan , LIU Shaobo , MA Xingzhi , JIANG Lin and HONG Feng 1 Collaborative Innovation Center of Unconventional Oil and Gas Exploration and Development, Northeast Petroleum University, Daqing 163000, Heilongjiang, China 2 Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China Objective then gradually decreases, whereas the gas content increases gradually, behaving as firstly increasing rapidly More than 60% of China’s coalbed methane (CBM) and then increasing gently or keeping unchanged. resources are distributed in medium-high rank coal- However, the gas flow rate increases firstly and then bearing basins. Exploration practices have confirmed that decreases; specifically, the gas flow rate increases until the medium-high rank CBM enrichment and high yield reaching the peak value, and then decreases. The gas zones are mainly distributed in the slope areas of coal content and permeability of coal seam have a joint effect, basins and are significantly jointly controlled by gas which contributes most to the CBM output within the content and permeability of
Acta Geologica Sinica (English Edition) – Wiley
Published: Feb 1, 2017
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