Time-Lapse Cross-Well Pressure Tomography for Monitoring CO2 Plumes and Detecting Leaks: Efficient Approaches to Inversion

3 Pages Posted: 4 Apr 2019 Last revised: 27 Oct 2020

Date Written: October 21, 2018

Abstract

Downhole monitoring techniques for CO2 plumes have some advantages over surface seismic, particularly reduced surface footprint and environmental impact. Of possible downhole techniques, pressure monitoring has the merit of accessing the saturation/permeability/porosity distribution relatively directly, as opposed to indirect inferences from elastic impedances via seismic, or resistivity via EM methods. We have developed a range of plume imaging/inversion techniques for time-lapse cross-well pressure tests, based on an efficient, single phase, effective-compressibility model of reservoir flow which closely approximates multiphase pressure response at large scale. Inversion implementations using both object-based plume models with classical methods, and voxelised plume representations using nonlinear adjoint theory, are shown to be useful in imaging plume movement in time.

Keywords: Monitoring: pressure methods, GHGT-14

Suggested Citation

Ennis-King, Jonathan and Gunning, James and LaForce, Tara and Paterson, Lincoln and Jenkins, Charles, Time-Lapse Cross-Well Pressure Tomography for Monitoring CO2 Plumes and Detecting Leaks: Efficient Approaches to Inversion (October 21, 2018). 14th Greenhouse Gas Control Technologies Conference Melbourne 21-26 October 2018 (GHGT-14) , Available at SSRN: https://ssrn.com/abstract=3366402 or http://dx.doi.org/10.2139/ssrn.3366402

Jonathan Ennis-King (Contact Author)

CSIRO ( email )

Research Way
Clayton, Victoria 3168
Australia

James Gunning

CSIRO ( email )

10 Murray Dwyer Circuit
Mayfield West, New South Wales 2304
Australia

CO2CRC Ltd ( email )

11 – 15 Argyle Place South
Carlton
Australia

Tara LaForce

CSIRO

Research Way
Clayton, Victoria 3168
Australia

Lincoln Paterson

CSIRO

Research Way
Clayton, Victoria 3168
Australia

Charles Jenkins

CO2CRC Ltd ( email )

11 – 15 Argyle Place South
Carlton
Australia

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