Abstract：In order to study the reservoir characteristics and construction conditions revealed by different kinds of hydraulic fracturing curves, based on the comparative analysis of hydraulic fracturing operation curves of230 coalbed methane wells in Zhengzhuang and Fanzhuang blocks in Southern Qinshui Basin, combined the interrelation among pressure, displacement and sand-fluid ratio, it was classified the fracturing curves clalsitied. The results show that, the fracturing curves can be divided into two classification in the preflush stage, that is “ladder displacement curve”“stable displacement curve”; for the sand-laden fluid stage, the curves can be divided into four classes, including“pressure stable curve”, “pressure fluctuating”, “pressure rising”and “pressure declining”model. But in the displacing liquid stage, the pressure curves mainly appear a “rising”tendency. Further, engineering factors and geological connotation reflected by different kinds of fracturing operation curves were analyzed. Evaluation of gas production was done based on the drainage data on the spot, the results show pressure stable and declining model are approximately equal with a higher gas production, while fluctuating and rising model are also approximately equal with a lower gas production relatively.

Keyword：coalbed methane;hydraulic fracturing operation curves;drainage;