Gas sorption and non-Darcy flow in shale reservoirs

Wang, Xiukun; Sheng, James

doi:10.1007/s12182-017-0180-3

Title: Gas sorption and non-Darcy flow in shale reservoirs

Abstract

Gas sorption and non-Darcy flow are two important issues for shale gas reservoirs. The sorption consists of dissolution and adsorption. Dissolved gas and adsorbed gas are different. The former is dissolved in the shale matrix, while the latter is concentrated near the solid walls of pores. In this paper, the Langmuir equation is used to describe adsorption and Henry’s law is used to describe dissolution. The K coefficient in Henry’s law of 0.052 mmol/(MPa g TOC) is obtained by matching experimental data. The amount of dissolved gas increases linearly when pressure increases. Using only the Langmuir equation without considering dissolution can lead to a significant underestimation of the amount of sorbed gas in shales. For non-Darcy gas flow, the apparent permeability model for free gas is established by combining slip flow and Knudsen flow. For adsorbed gas, the surface diffusion effect is also considered in this model. Here, the surface diffusion coefficient is suggested to be of the same scale as the gas self-diffusion coefficient, and the corresponding effective permeability is derived. When

Authors:

Wang, Xiukun ^[1]; Sheng, James ^[1]

Texas Tech Univ., Lubbock, TX (United States)

Publication Date:: Sat Jul 22 00:00:00 EDT 2017

Research Org.:: Texas Tech Univ., Lubbock, TX (United States)

Sponsoring Org.:: USDOE Office of Fossil Energy (FE)

OSTI Identifier:: 1503615

Grant/Contract Number:: FE0024311

Resource Type:: Accepted Manuscript

Journal Name:: Petroleum Science

Additional Journal Information:: Journal Volume: 14; Journal Issue: 4; Journal ID: ISSN 1672-5107

Country of Publication:: United States

Language:: English

Subject:: 02 PETROLEUM; Apparent gas permeability; Shale; Adsorbed gas; Dissolved gas; Surface diffusion

Citation Formats


                    Wang, Xiukun, and Sheng, James. Gas sorption and non-Darcy flow in shale reservoirs.  United States: N. p., 2017. 
Web.  doi:10.1007/s12182-017-0180-3.

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                    Wang, Xiukun, & Sheng, James. Gas sorption and non-Darcy flow in shale reservoirs.  United States.  https://doi.org/10.1007/s12182-017-0180-3

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                    Wang, Xiukun, and Sheng, James. Sat .  
"Gas sorption and non-Darcy flow in shale reservoirs".  United States.  https://doi.org/10.1007/s12182-017-0180-3.  https://www.osti.gov/servlets/purl/1503615.

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@article{osti_1503615,

  title        = {Gas sorption and non-Darcy flow in shale reservoirs},

  author       = {Wang, Xiukun and Sheng, James},

  abstractNote = {Gas sorption and non-Darcy flow are two important issues for shale gas reservoirs. The sorption consists of dissolution and adsorption. Dissolved gas and adsorbed gas are different. The former is dissolved in the shale matrix, while the latter is concentrated near the solid walls of pores. In this paper, the Langmuir equation is used to describe adsorption and Henry’s law is used to describe dissolution. The K coefficient in Henry’s law of 0.052 mmol/(MPa g TOC) is obtained by matching experimental data. The amount of dissolved gas increases linearly when pressure increases. Using only the Langmuir equation without considering dissolution can lead to a significant underestimation of the amount of sorbed gas in shales. For non-Darcy gas flow, the apparent permeability model for free gas is established by combining slip flow and Knudsen flow. For adsorbed gas, the surface diffusion effect is also considered in this model. Here, the surface diffusion coefficient is suggested to be of the same scale as the gas self-diffusion coefficient, and the corresponding effective permeability is derived. When},

  doi          = {10.1007/s12182-017-0180-3},

  journal      = {Petroleum Science},

  number       = 4,

  volume       = 14,

  place        = {United States},

  year         = {Sat Jul 22 00:00:00 EDT 2017},

  month        = {Sat Jul 22 00:00:00 EDT 2017}

}

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Works referencing / citing this record:

A novel numerical model of gas transport in multiscale shale gas reservoirs with considering surface diffusion and Langmuir slip conditions
journal, May 2019

Huang, Ting; Cao, Lina; Yuan, Chengdong
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Title: Gas sorption and non-Darcy flow in shale reservoirs

Abstract

Citation Formats

Thermodynamics for solid solution-liquid-vapor equilibria: wax phase formation from heavy hydrocarbon mixtures journal, January 1986

Effect of Methane Adsorption on Stress-Dependent Porosity and Permeability in Shale Gas Reservoirs conference, May 2016

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Adsorption of methane and carbon dioxide on gas shale and pure mineral samples journal, December 2014

Molecular dynamics simulations of oil transport through inorganic nanopores in shale journal, May 2016

Report: a Model for Flows in Channels, Pipes, and Ducts at Micro and nano Scales journal, February 1999

Numerical Simulation of Stress and Strain Due to Gas Sorption/Desorption and Their Effects on In Situ Permeability of Coalbeds journal, October 2006

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Gas Permeability of Shale journal, August 2012

A model of dynamic adsorption–diffusion for modeling gas transport and storage in shale journal, June 2016

Slip flow in porous media journal, June 2016

Fast mass transport of oil and supercritical carbon dioxide through organic nanopores in shale journal, October 2016

Effective Correlation of Apparent Gas Permeability in Tight Porous Media journal, July 2009

Apparent permeability prediction of organic shale with generalized lattice Boltzmann model considering surface diffusion effect journal, October 2016

Improved Permeability Prediction Relations for Low Permeability Sands conference, April 2013

A model for multiple transport mechanisms through nanopores of shale gas reservoirs with real gas effect–adsorption-mechanic coupling journal, February 2016

Impact of Adsorption on Gas Transport in Nanopores journal, March 2016

Subcontinuum mass transport of condensed hydrocarbons in nanoporous media journal, April 2015

Modeling the density profiles and adsorption of pure and mixture hydrocarbons in shales journal, June 2016

Measurement of gas storage processes in shale and of the molecular diffusion coefficient in kerogen journal, March 2014

High-pressure adsorption of gases on shales: Measurements and modeling journal, June 2012

Nanoscale Gas Flow in Shale Gas Sediments journal, October 2007

Gas flow in ultra-tight shale strata journal, September 2012

Thermodynamic Micellization Model for Asphaltene Precipitation from Reservoir Crudes at High Pressures and Temperatures conference, April 2013

Model for Surface Diffusion of Adsorbed Gas in Nanopores of Shale Gas Reservoirs journal, March 2015

New Pore-scale Considerations for Shale Gas in Place Calculations conference, April 2013

The Viscosity of Natural Gases journal, August 1966

Analytical analysis of gas diffusion into non-circular pores of shale organic matter journal, April 2017

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Thermodynamic Micellization Model for Asphaltene Precipitation From Reservoir Crudes at High Pressures and Temperatures journal, February 2000

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A novel numerical model of gas transport in multiscale shale gas reservoirs with considering surface diffusion and Langmuir slip conditions journal, May 2019

Thermodynamics for solid solution-liquid-vapor equilibria: wax phase formation from heavy hydrocarbon mixtures
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Effect of Methane Adsorption on Stress-Dependent Porosity and Permeability in Shale Gas Reservoirs
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Adsorption Enhanced Transport of Hydrocarbons in Organic Nanopores
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Adsorption of methane and carbon dioxide on gas shale and pure mineral samples
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Molecular dynamics simulations of oil transport through inorganic nanopores in shale
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Report: a Model for Flows in Channels, Pipes, and Ducts at Micro and nano Scales
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Numerical Simulation of Stress and Strain Due to Gas Sorption/Desorption and Their Effects on In Situ Permeability of Coalbeds
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Evaluation of Gas Adsorption in Marcellus Shale
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Nanopores and Apparent Permeability of Gas Flow in Mudrocks (Shales and Siltstone)
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