Research and Application of High-Production Area Seismic Prediction Technology for High-Rank Coalbed Methane Reservoir

Abstract

In order to accurately predict the high-production areas in CBM reservoirs, we identified the main geological factors controlling the CHM production. Based on the statistical analysis data of the geological and production area and seismic prediction methods, the comparative influence of the five main geological factors was studied. The validity of the seismic prediction method was further evaluated. The results show that the production of a GEM well is influenced by the reservoir structure, gas content, permeability, and coal-body structure. The above four geological controlling factors can be accurately evaluated by the seismic attributes. The proposed high-production area seismic prediction method can be applied for accurate localization of the high-production areas. When the high-production evaluation index is lower than 0.2, the daily gas production exceeds 1000 The method can provide an effective instrument for evaluating formation productivity.