Hydrologic characterization of coal seams for methane recovery--Activity 7-1 progress report: single-phase saturated and unsaturated flow-parametric study. Topical report, January 1985-March 1986

The report is part of a program to hydrologically characterize coal seams for methane recovery. The overall objective is to develop procedures for well testing and analysis in regions of quasi two-phase, unsaturated, and two-phase flow--regimes controlled by a large number of parameters. An approximate analytical solution to saturated and unsaturated single-phase flow when bottom-hole pressure is held constant was developed and the solution used to run two separate parametric studies to determine the sensitivity of gas desorption to various input parameters. The parameters were then ranked from most to least important in their influence on total methane released.