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Metadata Files

Data Publication

Permeability of bituminous coal to CH4 and CO2 under fixed volume and stress boundary conditions: Effects of sorption

Jinfeng Liu

Utrecht University

(2022)

Descriptions

We report permeability data of a cylindrical sample of high volatile bituminous coal (25mm in diameter) with a clearly visible cleat system, to CH4 and CO2, performed under (near) fixed volume versus fixed stress conditions. To isolate the effect of sorption on permeability evolution, helium (non-sorbing gas) was used as a control fluid. All flow-through tests reported here were conducted under conditions of single-phase flow at 40℃, employing Terzaghi effective stresses of 14-35MPa. This experimental study aimed to gain a better understanding of the effects of fully coupled stress-strain-sorption-diffusion behaviour on permeability evolution in coal reservoirs during CO2-Enhanced Coalbed Methane (ECBM) recovery. Our results obtained permeability evolution versus changes in effective stress under both fixed volume and fixed stress conditions, showing an exponential correlation. Importantly, permeability (κ) obtained at similar effective stresses showed κ_helium > κ_(CH_4 ) >> κ_(CO_2 ), and κ measured at fixed volume is higher than fixed stress. This all demonstrates that permeability to CH4 and CO2, under in-situ boundary conditions, is strongly influenced by the coupled effects of a) self-stress generated by swelling, b) the change in effective stress coefficient upon sorption, c) sorption-induced closure of transport paths independently of poro-elastic effect, and d) heterogeneous gas penetration and equilibration, dependent on diffusion. Our results also show that the Walsh permeability model offers a promising basis for relating permeability evolution to in-situ stress evolution, using appropriate parameter values corrected for the effects of stress-strain-sorption-diffusion. These data are supplementary to: Liu, J., Spiers, C.J., 2022. Permeability of bituminous coal to CH4 and CO2 under fixed volume and stress boundary conditions: Effects of sorption. Submitted to Frontiers in Earth Sciences.

Keywords


Originally assigned keywords
Rock and melt physical properties
Permeability evolution
CO2-ECBM
Stress-strain-sorption-diffusion behaviour
Effective stress
Boundary conditions
EPOS
multi-scale laboratories
rock and melt physical properties
bituminous_coal
Permeameter
Thermocouple
Strain gauge
Permeability
Imposed Stress

Corresponding MSL vocabulary keywords
permeameter
thermometer
permeability

MSL enriched keywords
Apparatus
fluid transport testing
permeameter
Ancillary equipment
measurement of temperature
thermometer
Measured property
permeability
sedimentary rock
coal
bituminous coal
strain
Inferred deformation behavior
deformation behaviour
poroelastic deformation
Measured property
strain
measured property
carbon (C)
carbon dioxide
methane
helium

MSL enriched sub domains i

rock and melt physics
analogue modelling of geologic processes
geochemistry

Source

https://public.yoda.uu.nl/geo/UU01/XOJCFK.html

Source publisher

Utrecht University


DOI

10.24416/uu01-xojcfk


Creators

Jinfeng Liu

Sun Yat-Sen University

ORCID:

0000-0002-6444-9427


Contributors

Liu, Jinfeng

DataCollector

Sun Yat-Sen University

ORCID:

0000-0002-6444-9427

Liu, Jinfeng

Researcher

Sun Yat-Sen University

ORCID:

0000-0002-6444-9427

Spiers, Christopher

Researcher

Utrecht University

ORCID:

0000-0002-3436-8941


References

0072-1026

10.1029/2008JB005750

https://webbook.nist.gov/chemistry/fluid/

10.1016/j.jmps.2012.06.012


Citation

Liu, J. (2022). Permeability of bituminous coal to CH4 and CO2 under fixed volume and stress boundary conditions: Effects of sorption (Version 1.0) [Data set]. Utrecht University. https://doi.org/10.24416/UU01-XOJCFK


Dates

Updated:

2022-02-18T14:12:08

Collected:

2015-11-01/2016-06-30


Language

en


Funding References

Funder name: The China Scholarship Council


Rights

Open - freely retrievable

Creative Commons Attribution 4.0 International Public License


Datacite version

Version 1.0