Productivity Prediction of Coalbed Methane Wells in the Southern Junggar Basin

Abstract

Based on the coal reservoirs geological feature and coalbed methane (CBM) wells production data, and taken FS-2 well in the southern Junggar Basin as examples, history matching and productivity prediction of FS-2 well were conducted by using COMET3 numerical modeling software and the influence factors sensitivity of gas well productivity in the study area were analyzed. The results suggest: FS-2 well total gas production in the eight years was 2915007 m 3 , and the average daily gas production reached 1209.5m 3 /d, the CBM well belongs to medium production well. Permeability and gas content has the most effect on the single wells production in the study area, so the influence of the fracture half-length and coal seam thickness is weakened.