Process-based approach for the detection of CO2 injectate leakage
US9816972B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2014 |
| Grant date | Nov 14, 2017 |
| Priority date | — |
| Expiry date | Sep 21, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A50/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention includes a method for distinguishing between a natural source of deep gas and gas leaking from a CO2 storage reservoir at a near surface formation comprising: obtaining one or more surface or near surface geological samples; measuring a CO2, an O2, a CH4, and an N2 level from the surface or near surface geological sample; determining the water vapor content at or above the surface or near surface geological samples; normalizing the gas mixture of the CO2, the O2, the CH4, the N2 and the water vapor content to 100% by volume or 1 atmospheric total pressure; determining: a ratio of CO2 versus N2; and a ratio of CO2 to N2, wherein if the ratio is greater than that produced by a natural source of deep gas CO2 or deep gas methane oxidizing to CO2, the ratio is indicative of gas leaking from a CO2 storage reservoir.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.