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:
- Issue Date:
- Research Org.:
- Board of Regents, The University of Texas System, Austin, TX (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1356235
- Patent Number(s):
- 9645129
- Application Number:
- 14/318,087
- Assignee:
- Board of Regents, The University of Texas System
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- 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. 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}
}