Modeling of undersaturated coal seam gas reservoirs

Timothy E. Kohler, Turgay Ertekin

Research output: Contribution to conferencePaperpeer-review

13 Scopus citations

Abstract

Earlier numerical models for coal seam gas reservoirs assume that at initial reservoir conditions coal is either on or above the sorption isotherm, i.e., either equilibrium or saturated conditions prevail. Therefore, when undersaturated conditions exist, implementation of these models does not capture the physics of the problem accurately. In this paper, simple algorithmic procedures are proposed which allow the model to cross the isotherm between saturated and undersaturated regions during computations. Several examples which demonstrate the successful application of the proposed algorithms are presented. Implementation of the switching mechanisms to existing coalbed simulators is straightforward and should significantly enhance their applications.

Original languageEnglish (US)
Pages341-357
Number of pages17
StatePublished - Jan 1 1995
EventProceedings of the SPE Rocky Mountain Regional/Low Permeability Reservoirs Symposium and Exhibition - Denver, CO, USA
Duration: Mar 19 1995Mar 22 1995

Other

OtherProceedings of the SPE Rocky Mountain Regional/Low Permeability Reservoirs Symposium and Exhibition
CityDenver, CO, USA
Period3/19/953/22/95

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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