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Title: Process-based approach for the detection of deep gas invading the surface

Abstract

The present invention includes a method for determining the level of deep gas in a near surface formation that includes: measuring CO.sub.2, O.sub.2, CH.sub.4, and N.sub.2 levels in percent by volume from one or more surface or near surface geological samples; adding the water vapor content to the measured CO.sub.2, O.sub.2, CH.sub.4, and N.sub.2 levels in percent by volume; normalizing the gas mixture to 100% by volume or 1 atmospheric total pressure; and determining the ratios of: O.sub.2 versus CO.sub.2 to distinguish in-situ vadose zone CO.sub.2 from exogenous deep leakage CO.sub.2; CO.sub.2 versus N.sub.2 to distinguish whether CO.sub.2 is being removed from the near surface formation or CO.sub.2 is added from an exogenous deep leakage input; or CO.sub.2 versus N.sub.2/O.sub.2 to determine the degree of oxygen influx, consumption, or both; wherein the ratios are indicative of natural in situ CO.sub.2 or CO.sub.2 from the exogenous deep leakage input.

Inventors:
;
Publication Date:
Research Org.:
Board of Regents, The University of Texas System, Austin, TX (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1356235
Patent Number(s):
9,645,129
Application Number:
14/318,087
Assignee:
Board of Regents, The University of Texas System NETL
DOE Contract Number:  
FG04-90AL65847; FG26-05NT42590
Resource Type:
Patent
Resource Relation:
Patent File Date: 2014 Jun 27
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; 58 GEOSCIENCES

Citation Formats

Romanak, Katherine, and Bennett, Philip C. Process-based approach for the detection of deep gas invading the surface. United States: N. p., 2017. Web.
Romanak, Katherine, & Bennett, Philip C. Process-based approach for the detection of deep gas invading the surface. United States.
Romanak, Katherine, and Bennett, Philip C. Tue . "Process-based approach for the detection of deep gas invading the surface". United States. doi:. https://www.osti.gov/servlets/purl/1356235.
@article{osti_1356235,
title = {Process-based approach for the detection of deep gas invading the surface},
author = {Romanak, Katherine and Bennett, Philip C.},
abstractNote = {The present invention includes a method for determining the level of deep gas in a near surface formation that includes: measuring CO.sub.2, O.sub.2, CH.sub.4, and N.sub.2 levels in percent by volume from one or more surface or near surface geological samples; adding the water vapor content to the measured CO.sub.2, O.sub.2, CH.sub.4, and N.sub.2 levels in percent by volume; normalizing the gas mixture to 100% by volume or 1 atmospheric total pressure; and determining the ratios of: O.sub.2 versus CO.sub.2 to distinguish in-situ vadose zone CO.sub.2 from exogenous deep leakage CO.sub.2; CO.sub.2 versus N.sub.2 to distinguish whether CO.sub.2 is being removed from the near surface formation or CO.sub.2 is added from an exogenous deep leakage input; or CO.sub.2 versus N.sub.2/O.sub.2 to determine the degree of oxygen influx, consumption, or both; wherein the ratios are indicative of natural in situ CO.sub.2 or CO.sub.2 from the exogenous deep leakage input.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 09 00:00:00 EDT 2017},
month = {Tue May 09 00:00:00 EDT 2017}
}

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