Enhancing Coal Seam Gas Exploitation with Crosswell Seismic: Case Histories

Fundamental to successfully developing coal seam gas prospects is the ability to image fine scale structure and<br>stratigraphy of coal seams and th e surrounding formation away from the w ell so as to be tter estimate the next<br>drilling location to target maximum net pay zones. Much has been written about seismic imaging in coal seam gas<br>development over the past few years, yet conventional techniques of surface seismic and vertical seismic profiling<br>have not met the r esolution requirements to he lp in making more informed development decisions. Crosswell<br>seismic is a proven technique that helps achieving a vertical resolution of 1-3 m, well within the range required for<br>coal seam imaging. This paper discusses two c ase examples that highlight the imaging capability and potential<br>applications of gas monitoring specific to coal reservoirs.