Material-Balance Techniques for Coal-Seam and Devonian Shale Gas Reservoirs With Limited Water Influx
- 1 February 1993
- journal article
- conference paper
- Published by Society of Petroleum Engineers (SPE) in SPE Reservoir Engineering
- Vol. 8 (01) , 67-72
- https://doi.org/10.2118/20730-pa
Abstract
Summary: This paper presents the development of two material-balance methods for unconventional gas reservoirs. One method is appropriate for estimating original gas in place; the second is appropriate for making reservoir predictions. These techniques differ from the material-balance methods for conventional gas reservoirs in that the effects of adsorbed gas are included. For estimating original gas in place, the assumption of equilibrium between the free- and adsorbed-gas phases is required. No additional assumptions are required for reservoir predictions.Keywords
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