页岩气渗流数学模型

Translated title of the contribution: Gas flow in shale reservoirs

Yang Xia, Yan Jin, Mian Chen, Kangping Chen

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

This study incorporates various gas transport mechanisms in shale nanopores with nonlinear and non-equilibrium gas adsorption- desorption kinetics. We formulate a simplified model for matrix and hydraulic fractures to study the dynamic production performance of multi-stage fractured horizontal wells in shale gas reservoirs. The gas transport mechanisms include viscous flow, Knudsen diffusion of free gas, surface diffusion, and slippage of adsorbed gas whilerock deformation is coupled in the flow equations. The sensitivity of the production rate to key physical parameters is examined through numerical simulation. Our results indicate that the viscous flow and Knudsen diffusion dominate the production of shale gas. The production rate was sensitive to the desorption rate while largely unaffected by the surface diffusion and slippage of the adsorbed gas, given that the transport process of adsorbed gas is a much slower process than the diffusion of free gas.

Translated title of the contributionGas flow in shale reservoirs
Original languageChinese
Pages (from-to)2259-2271
Number of pages13
JournalKexue Tongbao/Chinese Science Bulletin
Volume60
Issue number24
DOIs
StatePublished - Aug 25 2015

Keywords

  • Flow mechanism
  • Non-equilibrium desorption
  • Numerical simulation
  • Shale gas

ASJC Scopus subject areas

  • General

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