Study on Relationship Between Coal Bed Methane Resources Deposit Condition and Vertical Gas Well Production Capacity

Based on the exploration and development information of coal bed methane vertical well in Fanzhuang Block,in order to seek a high production favorable target zone in Fanzhuang Block,the numerical simulation and the comparison analysis method were applied to analyze the relationship between the resource richness,s aturation of gas content,gas content, seam thickness,critical reservoir ratio and average daily gas production in consideration of the structure factors and in no consider ation of the structure factors.The results showed that under the condition of no consideration of the development technique influences, the five deposit parameters of the coal bed methane affected to the gas production capacity in flowing sequence: the critical reservoir ratio,the saturation of gas content,resource richness,gas content an d seam thickness.The critical reservoir ratio was the direction main controlled factor affected to the gas production in Fanzhuang Block. Therefore,the high critical reserv oir ratio and high gas content saturation reservoir would be the first selected target stratum for the exploration and development of the coal bed methane vertical gas W ell in the block.