Unsteady-state nature of sorption and diffusion phenomena in the micropore structure of coal. Part 2. Solution

J. E. Kolesar, Turgay Ertekin, S. T. Obut

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

A single-phase, 1D mathematical model, formulated in Part 1 of this study, is used to study unsteady-state micropore sorption in the composite micropore/fracture coalbed-methane-transport problem. The mathematical model is solved numerically by writing the transport equations in finite-difference form and linearizing the residual form of the difference equations with the generalized Newton-Raphson procedure. The numerical model is used to compare methane production rates predicted by unsteady- and quasisteady-state sorption formulations. Results indicate that the two models give different rates during early degasification periods. The high rates predicted by the unsteady-state model, however, generally approached lower quasisteady-state rates within the first few months of simulation.

Original languageEnglish (US)
Pages (from-to)89-9719398
Number of pages9719310
JournalSPE Formation Evaluation
Volume5
Issue number1
StatePublished - Mar 1990

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Coal
Sorption
Mathematical models
Methane
Difference equations
Numerical models
Composite materials
Coal bed methane

All Science Journal Classification (ASJC) codes

  • Process Chemistry and Technology

Cite this

Kolesar, J. E. ; Ertekin, Turgay ; Obut, S. T. / Unsteady-state nature of sorption and diffusion phenomena in the micropore structure of coal. Part 2. Solution. In: SPE Formation Evaluation. 1990 ; Vol. 5, No. 1. pp. 89-9719398.
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Unsteady-state nature of sorption and diffusion phenomena in the micropore structure of coal. Part 2. Solution. / Kolesar, J. E.; Ertekin, Turgay; Obut, S. T.

In: SPE Formation Evaluation, Vol. 5, No. 1, 03.1990, p. 89-9719398.

Research output: Contribution to journalArticle

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