Abstract
We test the permeability response of Marcellus shale and Wolfcamp shale under changing strain. While magnitude of strain for a given stress is determined predominantly through mineral composition, the response of transport properties to a given strain are dependent on pore density, pore geometry, and rock fabric/mineral distribution around pores. We characterize the differences between the two shales using bulk mineralogy, SEM imaging with elemental analysis, and the cubic law for permeability evolution. We find that the Marcellus shale is comprised predominantly of clays that leads to more deformation when stressed than the Wolfcamp shale which is composed predominantly of quartz and calcite. The level of creep and compaction are directly related to the amount of clay in each shale sample. A novel result of our study is a strain-driven model to capture permeability evolution in shale due to differences in pore structure.
| Original language | English (US) |
|---|---|
| Article number | 102893 |
| Journal | Journal of Natural Gas Science and Engineering |
| Volume | 68 |
| DOIs | |
| State | Published - Aug 1 2019 |
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All Science Journal Classification (ASJC) codes
- Energy Engineering and Power Technology
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A strain based approach to calculate disparities in pore structure between shale basins during permeability evolution. / Schwartz, B.; Huffman, K.; Thornton, D.; Elsworth, Derek.
In: Journal of Natural Gas Science and Engineering, Vol. 68, 102893, 01.08.2019.Research output: Contribution to journal › Article
TY - JOUR
T1 - A strain based approach to calculate disparities in pore structure between shale basins during permeability evolution
AU - Schwartz, B.
AU - Huffman, K.
AU - Thornton, D.
AU - Elsworth, Derek
PY - 2019/8/1
Y1 - 2019/8/1
N2 - We test the permeability response of Marcellus shale and Wolfcamp shale under changing strain. While magnitude of strain for a given stress is determined predominantly through mineral composition, the response of transport properties to a given strain are dependent on pore density, pore geometry, and rock fabric/mineral distribution around pores. We characterize the differences between the two shales using bulk mineralogy, SEM imaging with elemental analysis, and the cubic law for permeability evolution. We find that the Marcellus shale is comprised predominantly of clays that leads to more deformation when stressed than the Wolfcamp shale which is composed predominantly of quartz and calcite. The level of creep and compaction are directly related to the amount of clay in each shale sample. A novel result of our study is a strain-driven model to capture permeability evolution in shale due to differences in pore structure.
AB - We test the permeability response of Marcellus shale and Wolfcamp shale under changing strain. While magnitude of strain for a given stress is determined predominantly through mineral composition, the response of transport properties to a given strain are dependent on pore density, pore geometry, and rock fabric/mineral distribution around pores. We characterize the differences between the two shales using bulk mineralogy, SEM imaging with elemental analysis, and the cubic law for permeability evolution. We find that the Marcellus shale is comprised predominantly of clays that leads to more deformation when stressed than the Wolfcamp shale which is composed predominantly of quartz and calcite. The level of creep and compaction are directly related to the amount of clay in each shale sample. A novel result of our study is a strain-driven model to capture permeability evolution in shale due to differences in pore structure.
UR - http://www.scopus.com/inward/record.url?scp=85066242850&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85066242850&partnerID=8YFLogxK
U2 - 10.1016/j.jngse.2019.05.006
DO - 10.1016/j.jngse.2019.05.006
M3 - Article
VL - 68
JO - Journal of Natural Gas Science and Engineering
JF - Journal of Natural Gas Science and Engineering
SN - 1875-5100
M1 - 102893
ER -