Full text loading...
-
Quantifying the Predicted Seismic and EM Response of CO2 Injection Into a Depleted Gas Reservoir
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, The Fourth EAGE Global Energy Transition Conference and Exhibition, Nov 2023, Volume 2023, p.1 - 5
Abstract
Summary
The South Morecambe producing gas field is a candidate for carbon capture and storage (CCS), where CO2 is planned to be injected into a depleted CH4 sandstone reservoir. Various geophysical monitoring technologies are being investigated to determine the optimum solutions for conformance of the CO2 injection into the reservoir and future monitoring tools for containment. In this paper we discuss the results of rock physics and 1D forward modelling for varying pressure and gas composition scenarios to understand if 4D seismic and electromagnetic (EM) methods are a feasible technology.
Results show that 4D seismic responses of CO2 movement in the reservoir are likely to be below detection, but monitoring may be feasible if super-critical conditions exist and if monitor surface or borehole surveys are designed to capture sufficiently long offsets to invert for elastic property changes above the noise floor. 4D seismic monitoring and EM monitoring were shown to be feasible technologies for detecting the unlikely event of the plume migrating into the overburden. Both technologies can be considered as effective tools in part of a wider monitoring strategy as outlined by Le Calvez et al. (2021) .
© EAGE Publications BV