Relative Permeability in Coal (2016-2019)
Abstract
Effective permeability, the single most important determinant of gas productivity from coal seam gas reservoirs, is currently carried over from developments in conventional gas reservoirs, as a function of the degree of water saturation only. This is demonstrably incorrect, misunderstands the fundamental physical differences between coal and other rocks as gas reservoirs, fails to recognize the dependence important determinants of coal relative permeability, and misrepresents the flow system. This project seeks to address these deficiencies by providing a better, phenomenologically based understanding and functional relationship for coal relative permeability based on the fundamental principles than govern physical flow interactions.
