01740nab a2200217 4500 20260520000317.0 260224s2014 xxu ing Inglés Unsteady-state diffusion modeling of gas in coal matrix for horizontal well production sept. 2014 17/11/2014 ; 17/11/2014 28 p. ; 1669-1697 Transcripción del resumen del autor: In this work, an unsteady-state diffusion model was developed to describe gas transport in coal structures for horizontal well production. The model assumes unsteady-state diffusion of gas through the matrix according to Fick’s law, Darcy flow through the cleat network (natural fractures), and that gas adsorption can be described by the Langmuir equation. Then the model using Laplace integral transformation was solved. Using the new model, dimensionless-type curves for pressure-transient and rate-decline analyses were used to analyze transient transport characteristics. The differences for unsteady-state diffusion between horizontal and vertical well models and the differences for horizontal well production between unsteady-state diffusion and pseudosteady-state diffusion were specifically analyzed. Several scenarios confronting real coal beds were studied and discussed fully through simulating well production under different conditions. The research results showed that the unsteady-state diffusion model would be another choice with which to analyze well tests. 9 AAPG Bulletin 98 ARTICULO Guo, Jian-Chun 54230 Nie, Ren-Shi 54231 Jia, Yong-Lu 54232 188659 188659 0 0 0 0 256478 BAAB BAAB 2026-03-06 200060865 0 200060865 2026-03-06 00:18:44 2026-03-06 ARTICULO