Modeling and performance prediction for water production in CBM wells of an Eastern India coalfield

Dewatering of coal bed methane (CBM) reservoirs is a very important part of methane production. Efficient production depends very much on the proper designing of the wells. In the present study, a comprehensive testing is conducted on 17 wells of a particular block in Eastern India and a general reservoir flow equation is modeled. Prediction of the water flow potential of a particular well using the derived flow equation helps in monitoring the variables of the artificial lift facility. The outcome of work can be used comprehensively to predict the future water and gas flow rates of simulated wells under the designed test.

► The paper describes the geology and reservoir properties of the most promising Indian CBM field in detail.
► Developed model will be helpful in designing of artificial lift.
► Developed equation will be useful in optimizing water production.
► Designed testing and prediction technique is faster compared to conventional methods.
► Highlighted the importance of CBM and difficulties involved in CBM production.