Matrix shrinkage and swelling effects on economics of enhanced coalbed methane production and CO 2 sequestration in coal

F. B. Gorucu, S. A. Jikich, G. S. Bromhal, W. N. Sams, T. Ertekin, D. H. Smith

Research output: Contribution to conferencePaper

2 Scopus citations

Abstract

Proven coalbed methane reserves have been pegged at 18.5 tcf, representing 10% of the total natural gas reserves in the US. The Palmer-Mansoori model for coal shrinkage and permeability increases during primary methane production was re-written to account for coal swelling caused by CO 2 sorption. The generalized model was added to PSU-COALCOMP, a dual porosity reservoir simulator for primary and enhanced coalbed methane production. Injectivity of CO 2 decreased when swelling occurred. Profits from a project might be affected positively or negatively by swelling and shrinkage effects. The effects of swelling and shrinkage were not limited to the injection wells; production wells could see a permeability increase or decrease. Accurate values of Young's modulus and Poisson's ratio are necessary to make reliable predictions. Net present value analyses of the simulation results included profits due to methane production, and potential incentives for CO 2 sequestered. This is an abstract of a paper presented at the SPE Eastern Regional Meeting (Morgantown, WV 9/14-16/2005).

Original languageEnglish (US)
StatePublished - 2005
EventSociety of Petroleum Engineers Eastern Regional Meeting 2005 - Morgantown, West VA, United States
Duration: Sep 14 2005Sep 16 2005

Other

OtherSociety of Petroleum Engineers Eastern Regional Meeting 2005
CountryUnited States
CityMorgantown, West VA
Period9/14/059/16/05

All Science Journal Classification (ASJC) codes

  • Energy(all)

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    Gorucu, F. B., Jikich, S. A., Bromhal, G. S., Sams, W. N., Ertekin, T., & Smith, D. H. (2005). Matrix shrinkage and swelling effects on economics of enhanced coalbed methane production and CO 2 sequestration in coal. Paper presented at Society of Petroleum Engineers Eastern Regional Meeting 2005, Morgantown, West VA, United States.