Out of that comparison has evolved a basin-scale coalbed methane producibility model whose essential elements are (1) ground- water flow basinward through coals of high rank and high gas content orthogonally toward no-flow boundaries and (2) conventional trapping along those boundaries.
(a basin-scale coalbed methane producibility model; are; 1) ground- water flow basinward through coals of high rank and high gas content orthogonally toward no-flow boundaries and (2) conventional trapping along those boundaries)
a basin-scale coalbed methane producibility model
are
1) ground- water flow basinward through coals of high rank and high gas content orthogonally toward no-flow boundaries and (2) conventional trapping along those boundaries