Klinkenberg Effect and Effective Pressure for Gas Permeability of Tight Sandstones
Abstract
Gas permeability kg of tight sandstones was measured while cycling pore pressure, Pf, and confining pressure, Pc, using two different procedures. Firstly, we cycled the pore pressure from a minimum value close to atmospheric pressure to a maximum one slightly lower than Pc, while keeping the Pc constant. Secondly, Pf and Pc were simultaneously varied so as to keep the difference, Pc - Pf, constant. Significant effects owing to slip flow were observed when the gas pressure was lower than about 5 MPa. Klinkenberg plots showed that, under constant Pc, gas permeability kg decreased linearly for high values of 1/Pf, reached a minimum and then sharply increased as 1/Pf approached zero. Under constant Pc - Pf, kg again decreased linearly in the high limit of 1/Pf and showed additional decrease in the low 1/Pf limit. The linear segments in both procedures indicate that kg in tight sandstones was subject to slip flow at low values of Pf, while the curved segments revealed the sensitivity of permeability to effective pressure when Pf became comparable in magnitude to confining pressure. The effective pressure coefficient α was estimated and generally appeared to be a well-defined decreasing function of the pressure difference Pc -more »
- Authors:
-
- Southwest Petroleum Univ., Chengdu (China). State Key Lab. of Oil and Gas Reservoir Geology and Exploitation
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Earth, Atmospheric and Planetary Sciences Dept.
- Publication Date:
- Research Org.:
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division
- OSTI Identifier:
- 1515257
- Alternate Identifier(s):
- OSTI ID: 1496915
- Grant/Contract Number:
- FG02-97ER14760; FG01‐09ER14760
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Geophysical Research. Solid Earth
- Additional Journal Information:
- Journal Volume: 124; Journal Issue: 2; Journal ID: ISSN 2169-9313
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; gas permeability; Klinkenberg plots; effective pressure; pressure sensitivity; tight sandstones
Citation Formats
Xiao, Wenlian, Bernabé, Yves, Evans, Brian, Mok, Ulrich, Zhao, Jinzhou, Ren, Xiyao, and Chen, Meng. Klinkenberg Effect and Effective Pressure for Gas Permeability of Tight Sandstones. United States: N. p., 2019.
Web. doi:10.1029/2018JB016686.
Xiao, Wenlian, Bernabé, Yves, Evans, Brian, Mok, Ulrich, Zhao, Jinzhou, Ren, Xiyao, & Chen, Meng. Klinkenberg Effect and Effective Pressure for Gas Permeability of Tight Sandstones. United States. https://doi.org/10.1029/2018JB016686
Xiao, Wenlian, Bernabé, Yves, Evans, Brian, Mok, Ulrich, Zhao, Jinzhou, Ren, Xiyao, and Chen, Meng. Mon .
"Klinkenberg Effect and Effective Pressure for Gas Permeability of Tight Sandstones". United States. https://doi.org/10.1029/2018JB016686. https://www.osti.gov/servlets/purl/1515257.
@article{osti_1515257,
title = {Klinkenberg Effect and Effective Pressure for Gas Permeability of Tight Sandstones},
author = {Xiao, Wenlian and Bernabé, Yves and Evans, Brian and Mok, Ulrich and Zhao, Jinzhou and Ren, Xiyao and Chen, Meng},
abstractNote = {Gas permeability kg of tight sandstones was measured while cycling pore pressure, Pf, and confining pressure, Pc, using two different procedures. Firstly, we cycled the pore pressure from a minimum value close to atmospheric pressure to a maximum one slightly lower than Pc, while keeping the Pc constant. Secondly, Pf and Pc were simultaneously varied so as to keep the difference, Pc - Pf, constant. Significant effects owing to slip flow were observed when the gas pressure was lower than about 5 MPa. Klinkenberg plots showed that, under constant Pc, gas permeability kg decreased linearly for high values of 1/Pf, reached a minimum and then sharply increased as 1/Pf approached zero. Under constant Pc - Pf, kg again decreased linearly in the high limit of 1/Pf and showed additional decrease in the low 1/Pf limit. The linear segments in both procedures indicate that kg in tight sandstones was subject to slip flow at low values of Pf, while the curved segments revealed the sensitivity of permeability to effective pressure when Pf became comparable in magnitude to confining pressure. The effective pressure coefficient α was estimated and generally appeared to be a well-defined decreasing function of the pressure difference Pc - Pf. We modified the Walsh permeability model for fissured rocks to include slip-flow effects and obtained satisfactory fits to the experimental data for the samples with lowest porosities and highest pressure-sensitivities. This observation suggests that the intrinsic permeability of these rocks was controlled by inter- and/or intra-granular crack-like pores.},
doi = {10.1029/2018JB016686},
journal = {Journal of Geophysical Research. Solid Earth},
number = 2,
volume = 124,
place = {United States},
year = {Mon Jan 28 00:00:00 EST 2019},
month = {Mon Jan 28 00:00:00 EST 2019}
}
Web of Science
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