Publications

Methane gas is a promising potential source for the future energy needs of humanity. The author will describe the analytical method of predicting the production profile of gas and water of a Coal Bed Methane (CBM) field, using the material balance of a modified G.R. King iteration procedure. The author has concluded that some of the steps within the iteration procedure of G.R. King are not suitable, and has thus applied a mathematical analysis to correct G.R. King's iteration procedure, to allow the prediction of a production profile in a CBM field. With the newly-modified iteration procedure, the author applied the material balance technique with data given by G.R. King (SPE 20730) and working from other references was able to generate a production profile for a CBM field. The author also applied the Corey Correlation for gas and water to ascertain whether it is suitable or not to generate the production profile of a CBM field. The author concluded that the modified G.R. King iteration procedure is analytically suitable for the production profile of a CBM field. However, the Corey Correlation has never been found suitable to precisely describe the characterization of a CBM production profile. Moreover, the author tried to analyze many different values within Corey parameters, and in this paper posits that the most suitable parameter to be changed is the Corey exponent. The larger the value of the water saturation exponent, the longer the time consumed for water recovery. The larger the value of the gas saturation exponent, the longer the time consumed for gas recovery, this creates a different production profile for as CBM field.