发明名称 |
PROCESS-BASED APPROACH FOR THE DETECTION OF DEEP GAS INVADING THE SURFACE |
摘要 |
The present invention includes a method for determining the level of deep gas in a near surface formation that includes: measuring CO2, O2, CH4, and N2 levels in percent by volume from one or more surface or near surface geological samples; adding the water vapor content to the measured CO2, O2, CH4, and N2 levels in percent by volume; normalizing the gas mixture to 100% by volume or 1 atmospheric total pressure; and determining the ratios of: O2 versus CO2 to distinguish in-situ vadose zone CO2 from exogenous deep leakage CO2; CO2 versus N2 to distinguish whether CO2 is being removed from the near surface formation or CO2 is added from an exogenous deep leakage input; or CO2 versus N2/O2 to determine the degree of oxygen influx, consumption, or both; wherein the ratios are indicative of natural in situ CO2 or CO2 from the exogenous deep leakage input. |
申请公布号 |
US2015004708(A1) |
申请公布日期 |
2015.01.01 |
申请号 |
US201414318087 |
申请日期 |
2014.06.27 |
申请人 |
Board of Regents, The University of Texas System |
发明人 |
Romanak Katherine;Bennett Philip C. |
分类号 |
G01N33/22 |
主分类号 |
G01N33/22 |
代理机构 |
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代理人 |
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主权项 |
1. A method of determining the level of deep gas in a near surface formation without the need for background monitoring comprising:
measuring CO2, O2, CH4, and N2 levels in percent by volume from one or more surface or near surface geological samples; adding the water vapor content to the measured CO2, O2, CH4, and N2 levels in percent by volume; normalizing the gas mixture to 100% by volume or 1 atmospheric total pressure; and determining the ratios of:
O2 versus CO2 to distinguish in-situ vadose zone CO2 from exogenous deep leakage CO2;CO2 versus N2 to distinguish whether CO2 is being removed from the near surface formation or CO2 is added from an exogenous deep leakage input; orCO2 versus N2/O2 to determine the degree of oxygen influx, consumption, or both;wherein the ratios are indicative of natural in situ CO2 or CO2 from the exogenous deep leakage input. |
地址 |
Austin TX US |