mCSEM inversion for CO2 sequestration monitoring at a deep brine aquifer in a shallow sea

2015 ◽  
Vol 46 (3) ◽  
pp. 236-252 ◽  
Author(s):  
Seogi Kang ◽  
Kyubo Noh ◽  
Soon Jee Seol ◽  
Joongmoo Byun
Keyword(s):  
Co2 Sequestration ◽  
Shallow Sea ◽  
Brine Aquifer

A feasibility study of CO2 sequestration monitoring using the mCSEM method at a deep brine aquifer in a shallow sea

Geophysics ◽  
2012 ◽  
Vol 77 (2) ◽  
pp. E117-E126 ◽  
Author(s):  
Seogi Kang ◽  
Soon Jee Seol ◽  
Joongmoo Byun
Keyword(s):  
Numerical Experiments ◽  
Field Method ◽  
Optimum Operating ◽  
Shallow Sea ◽  
Secondary Field ◽  
Multiple Components ◽  
Electric And Magnetic Fields ◽  
And Migration ◽  
Very High ◽  
Brine Aquifer

Reservoir production monitoring using marine controlled-source electromagnetic (mCSEM) has been studied recently because it is sensitive to resistivity changes resulting from variations in hydrocarbon saturation. However, mCSEM for [Formula: see text] sequestration monitoring has scarcely been investigated, although the mCSEM method is advantageous for monitoring [Formula: see text] injection and migration. To investigate the feasibility of mCSEM monitoring for [Formula: see text] sequestration, we conducted numerical experiments of representative [Formula: see text] injection models at a deep brine aquifer in a shallow sea. By using a modified secondary field method, we effectively address the airwave problem occurring when mCSEM is applied to a target beneath a shallow sea. We demonstrate the modified secondary field method can restore high frequency band data, which is beneficial for the detection of the movement of injected [Formula: see text]. Furthermore, using a modified scattered field approach for 2.5D forward modeling, we achieve very high accuracy, which is essential for the simulation of electromagnetic fields generated by [Formula: see text] injection in a deep brine aquifer. The mCSEM response, which is enhanced by the modified secondary field method, shows small but measurable changes in a given pseudorealistic [Formula: see text] sequestration scenario. The mCSEM responses differ for horizontal and vertical injections. These results include the feasibility of applying mCSEM to [Formula: see text] sequestration monitoring. Optimum operating frequency bands and source-receiver geometries for a brine aquifer model beneath a shallow sea are proposed based on the results of the numerical experiments. Moreover, we suggest the necessity of various types of data acquisition for the monitoring of a [Formula: see text] plume based on analyses of multiple components of electric and magnetic fields.

The Plains CO2 Reduction (PCOR) Partnership: CO2 Sequestration Demonstration Projects Adding Value to the Oil and Gas Industry

2013 ◽  
Author(s):  
Charles D. Gorecki ◽  
Edward N. Steadman ◽  
John A. Harju ◽  
James A. Sorensen ◽  
John A. Hamling ◽  
...  
Keyword(s):  
Co2 Sequestration ◽  
Oil And Gas ◽  
Co2 Reduction ◽  
Oil And Gas Industry ◽  
Gas Industry
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