04544037 is referenced by 69 patents and cites 11 patents.

Production of methane from an underground wet coal seam is initiated by drilling a well from the surface of the earth through the seam. Rather than pumping water to lower hydraulic head on the seam to permit desorption of methane within the coal, high pressure gas is injected into the seam to drive water away from the wellbore. Gas injection is terminated and the well is opened to flow. Initial gas production is return of injected gas, followed by a mixture of return injected gas and methane, followed by free methane from the fracture system of the coal, and then by methane desorbed from the coal. Upon return of displaced water to the wellbore, pumping operations remove water at rates that permit sustained production of desorbed methane.

Title
Initiating production of methane from wet coal beds
Application Number
6/581733
Publication Number
4544037
Application Date
February 21, 1984
Publication Date
October 1, 1985
Inventor
Ruel C Terry
Denver
CO, US
Agent
Ruel C Terry
Assignee
In Situ Technology
CO, US
IPC
E21B 43/25
View Original Source