Abstract
At present, the variation of gas content resulted from the surface coalbed methane (CBM) development has not been reported at home. It is introduced that adopting the CBM-SIM software and combining with the key oil and gas special research task, the productivity prediction and reservoir simulation analysis of the impact and variation of the CBM in the surface CBM development process are conducted respectively in the Sihe north block and Chengzhuang block of the Jincheng mining area. Combined with the measured results of the gas content in the inspect well on the drainage effect after 5 years on the surface CBM development in the Sihe north block, the variation rules of the CBM in the surface coalbed methane development process are discussed and researched.
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