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Title: CO2 Utilization and Storage in Shale Gas Reservoirs: Experimental Results and Economic Impacts

Abstract

Natural gas is considered a cleaner and lower-emission fuel than coal, and its high abundance from advanced drilling techniques has positioned natural gas as a major alternative energy source for the U.S. However, each ton of CO2 emitted from any type of fossil fuel combustion will continue to increase global atmospheric concentrations. One unique approach to reducing anthropogenic CO2 emissions involves coupling CO2 based enhanced gas recovery (EGR) operations in depleted shale gas reservoirs with long-term CO2 storage operations. In this paper, we report unique findings about the interactions between important shale minerals and sorbing gases (CH4 and CO2) and associated economic consequences. Where enhanced condensation of CO2 followed by desorption on clay surface is observed under supercritical conditions, a linear sorption profile emerges for CH4. Volumetric changes to montmorillonites occur during exposure to CO2. Theory-based simulations identify interactions with interlayer cations as energetically favorable for CO2 intercalation. Thus, experimental evidence suggests CH4 does not occupy the interlayer and has only the propensity for surface adsorption. Mixed CH4:CO2 gas systems, where CH4 concentrations prevail, indicate preferential CO2 sorption as determined by in situ infrared spectroscopy and X-ray diffraction techniques. Collectively, these laboratory studies combined with a cost-based economic analysis providemore » a basis for identifying favorable CO2-EOR opportunities in previously fractured shale gas reservoirs approaching final stages of primary gas production. Moreover, utilization of site-specific laboratory measurements in reservoir simulators provides insight into optimum injection strategies for maximizing CH4/CO2 exchange rates to obtain peak natural gas production.« less

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Biological and Environmental Research (BER)
OSTI Identifier:
1829130
Alternate Identifier(s):
OSTI ID: 1223423
Report Number(s):
PNNL-SA-105772
Journal ID: ISSN 1876-6102; S1876610214026344; PII: S1876610214026344
Grant/Contract Number:  
AC05-76RL01830
Resource Type:
Published Article
Journal Name:
Energy Procedia (Online)
Additional Journal Information:
Journal Name: Energy Procedia (Online) Journal Volume: 63 Journal Issue: C; Journal ID: ISSN 1876-6102
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English
Subject:
03 NATURAL GAS; 54 ENVIRONMENTAL SCIENCES; carbon sequestration; clay minerals; wet supercritical carbon dioxide

Citation Formats

Schaef, H. Todd, Davidson, Casie L., Owen, A. Toni, Miller, Quin R. S., Loring, John S., Thompson, Christopher J., Bacon, Diana H., Glezakou, Vanda A., and McGrail, B. Pete. CO2 Utilization and Storage in Shale Gas Reservoirs: Experimental Results and Economic Impacts. Netherlands: N. p., 2014. Web. doi:10.1016/j.egypro.2014.11.819.
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Schaef, H. Todd, Davidson, Casie L., Owen, A. Toni, Miller, Quin R. S., Loring, John S., Thompson, Christopher J., Bacon, Diana H., Glezakou, Vanda A., & McGrail, B. Pete. CO2 Utilization and Storage in Shale Gas Reservoirs: Experimental Results and Economic Impacts. Netherlands. https://doi.org/10.1016/j.egypro.2014.11.819
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Schaef, H. Todd, Davidson, Casie L., Owen, A. Toni, Miller, Quin R. S., Loring, John S., Thompson, Christopher J., Bacon, Diana H., Glezakou, Vanda A., and McGrail, B. Pete. Wed . "CO2 Utilization and Storage in Shale Gas Reservoirs: Experimental Results and Economic Impacts". Netherlands. https://doi.org/10.1016/j.egypro.2014.11.819.
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@article{osti_1829130,
title = {CO2 Utilization and Storage in Shale Gas Reservoirs: Experimental Results and Economic Impacts},
author = {Schaef, H. Todd and Davidson, Casie L. and Owen, A. Toni and Miller, Quin R. S. and Loring, John S. and Thompson, Christopher J. and Bacon, Diana H. and Glezakou, Vanda A. and McGrail, B. Pete},
abstractNote = {Natural gas is considered a cleaner and lower-emission fuel than coal, and its high abundance from advanced drilling techniques has positioned natural gas as a major alternative energy source for the U.S. However, each ton of CO2 emitted from any type of fossil fuel combustion will continue to increase global atmospheric concentrations. One unique approach to reducing anthropogenic CO2 emissions involves coupling CO2 based enhanced gas recovery (EGR) operations in depleted shale gas reservoirs with long-term CO2 storage operations. In this paper, we report unique findings about the interactions between important shale minerals and sorbing gases (CH4 and CO2) and associated economic consequences. Where enhanced condensation of CO2 followed by desorption on clay surface is observed under supercritical conditions, a linear sorption profile emerges for CH4. Volumetric changes to montmorillonites occur during exposure to CO2. Theory-based simulations identify interactions with interlayer cations as energetically favorable for CO2 intercalation. Thus, experimental evidence suggests CH4 does not occupy the interlayer and has only the propensity for surface adsorption. Mixed CH4:CO2 gas systems, where CH4 concentrations prevail, indicate preferential CO2 sorption as determined by in situ infrared spectroscopy and X-ray diffraction techniques. Collectively, these laboratory studies combined with a cost-based economic analysis provide a basis for identifying favorable CO2-EOR opportunities in previously fractured shale gas reservoirs approaching final stages of primary gas production. Moreover, utilization of site-specific laboratory measurements in reservoir simulators provides insight into optimum injection strategies for maximizing CH4/CO2 exchange rates to obtain peak natural gas production.},
doi = {10.1016/j.egypro.2014.11.819},
journal = {Energy Procedia (Online)},
number = C,
volume = 63,
place = {Netherlands},
year = {Wed Jan 01 00:00:00 EST 2014},
month = {Wed Jan 01 00:00:00 EST 2014}
}
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Publisher's Version of Record
https://doi.org/10.1016/j.egypro.2014.11.819
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Works referenced in this record:

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journal, December 2013

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  • DOI: 10.1016/j.ijggc.2013.12.012
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