NDLI: Analysis of Sorption-Induced Permeability Reduction Considering Gas Diffusion Phenomenon in Coal Seam Reservoir

Content Provider	Springer Nature Link
Author	Seomoon, Hyeok Lee, Minkyu Sung, Wonmo
Copyright Year	2015
Abstract	The sorbed gas diffuses in a coal matrix, where diffusion varies considerably with pore structure and pressure. The diffusion is an essential factor due to high sorption affinity of $$\hbox {CO}_{2}$$ on coal grain surface. The sorption within the matrix causes swelling or shrinkage of matrix, in which the amount of sorbed gas affects gas diffusion. In this study, in order to observe permeability change occurred when the sorbed gas diffuses in a coal matrix, experiments were conducted with a bituminous coal sample. Firstly, gas partial pressure was measured through a diffusion experiment with a transient flow method. Secondly, flowing experiments were conducted to examine the permeability reduction yielded by sorption phenomena according to the various pore pressures. The results were then analyzed for the effect of diffusion coefficient on permeability change. The diffusion coefficient of $$\hbox {CH}_{4}$$ in low-pressure section was greater than that of $$\hbox {CO}_{2}$$ owing to the difference in their molecular weight. However, as pressure increased, the diffusion coefficient of $$\hbox {CO}_{2}$$ became greater because of higher sorption affinity of $$\hbox {CO}_{2}$$ compared to $$\hbox {CH}_{4}$$ . Finally, it was revealed that the gas diffused instantaneously in the case of crushed coal in which its diffusion coefficient had infinite value due to the destroyed pore structure. Meanwhile, in the coal core sample in which pore structure was preserved as original state, it was ascertained that diffusional flow occurred gradually corresponding to concentration gradient, and hence, the permeability was reduced accordingly. This phenomenon was also confirmed through pore images obtained from X-ray CT.
Starting Page	713
Ending Page	729
Page Count	17
File Format	PDF
ISSN	01693913
Journal	Transport in Porous Media
Volume Number	108
Issue Number	3
e-ISSN	15731634
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-04-17
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Diffusion Transient flow analysis Adsorption Sorption-induced permeability reduction Pore structure Geotechnical Engineering & Applied Earth Sciences Industrial Chemistry/Chemical Engineering Hydrology/Water Resources Civil Engineering Hydrogeology Classical Continuum Physics
Content Type	Text
Resource Type	Article
Subject	Catalysis

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Gas Sorption and the Consequent Volumetric and Permeability Change of Coal II: Numerical Modeling

Gas Sorption and the Consequent Volumetric and Permeability Change of Coal I: Experimental

Pore-Scale Numerical Investigation on Chemical Stimulation in Coal and Permeability Enhancement for Coal Seam Gas Production

Sorption Rate of Carbon Dioxide on Coal

Effects of Organic Micromolecules in coal on its Pore Structure and Gas Diffusion Characteristics

Evolution of Coal Permeability with Cleat Deformation and Variable Klinkenberg Effect

A Study of Directional Permeability and Gas Injection to Flush Coal Seam Gas Testing Apparatus and Method

An Analytical Model of Apparent Gas Permeability for Tight Porous Media

Flow Consistency Between Non-Darcy Flow in Fracture Network and Nonlinear Diffusion in Matrix to Gas Production Rate in Fractured Shale Gas Reservoirs

Analysis of Sorption-Induced Permeability Reduction Considering Gas Diffusion Phenomenon in Coal Seam Reservoir

Similar Documents

Gas Sorption and the Consequent Volumetric and Permeability Change of Coal II: Numerical Modeling

Gas Sorption and the Consequent Volumetric and Permeability Change of Coal I: Experimental

Pore-Scale Numerical Investigation on Chemical Stimulation in Coal and Permeability Enhancement for Coal Seam Gas Production

Sorption Rate of Carbon Dioxide on Coal

Effects of Organic Micromolecules in coal on its Pore Structure and Gas Diffusion Characteristics

Evolution of Coal Permeability with Cleat Deformation and Variable Klinkenberg Effect

A Study of Directional Permeability and Gas Injection to Flush Coal Seam Gas Testing Apparatus and Method

An Analytical Model of Apparent Gas Permeability for Tight Porous Media

Flow Consistency Between Non-Darcy Flow in Fracture Network and Nonlinear Diffusion in Matrix to Gas Production Rate in Fractured Shale Gas Reservoirs

Analysis of Sorption-Induced Permeability Reduction Considering Gas Diffusion Phenomenon in Coal Seam Reservoir