Development of gas production type curves for horizontal wells in coalbed methane reservoirs

Coalbed methane is an unconventional gas resource that consists of methane production from coal seams. The unique difference between CBM and conventional gas reservoirs is that it is a dual-porosity system characterized by complex interaction of the coal matrix and cleat system that are coupled through the desorption process. Coalbed methane reservoir performance is controlled by a complex set of reservoir, geologic, completion and operation parameters. To date there are very little tools to help with predicting the performance of CBM wells.; The purpose of this research was to develop a simple and reliable tool to help with gas production predictions for horizontal coalbed methane wells that are located in the Northern Appalachian Basin. Upon completion, a unique set of type curves were developed, that will allow for independent producers to evaluate the future production of their wells. A correlation for the peak gas rate was also developed in order to forecast production if no production data is available.