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, D.
N1 - Funding Information:
This work is a partial result of support from Chevron Energy Technology Company , and their support is gratefully acknowledged. We also thank three anonymous reviewers, whose recommendations have helped improve this manuscript.
Funding Information:
This work is a partial result of support from Chevron Energy Technology Company, and their support is gratefully acknowledged. We also thank three anonymous reviewers, whose recommendations have helped improve this manuscript.
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/8
Y1 - 2019/8
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.
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U2 - 10.1016/j.jngse.2019.05.006
DO - 10.1016/j.jngse.2019.05.006
M3 - Article
AN - SCOPUS:85066242850
VL - 68
JO - Journal of Natural Gas Science and Engineering
JF - Journal of Natural Gas Science and Engineering
SN - 1875-5100
M1 - 102893
ER -