Three-Way Coupled Modeling Evaluates CO2 Sequestration in Depleted Reservoir

The authors of this paper describe a three-way coupled modeling approach that integrates dynamic, geochemistry, and geomechanics models to obtain cumulative effects of all three changes to evaluate future carbon dioxide storage.

January 1, 2023

Journal of Petroleum Technology

Fig. 1—Depth map showing the top of the carbonate.

Three major depleted gas reservoirs in the Central Luconia field offshore Sarawak, Malaysia, are being evaluated for future carbon-dioxide (CO₂) storage. A three-way coupled modeling approach that integrates dynamic, geochemistry, and geomechanics models is used to obtain the cumulative effect of all three changes. This integrated model provides a more-accurate estimate of CO₂ storage capacity, caprock-integrity evaluation, CO₂-plume migration path, and volume of CO₂ stored through different mechanisms.

Background

The CO₂ storage sites being evaluated are depleted gas reservoirs that have been in production for a few decades. At the end of their producing life, they have the potential to be converted into CO₂ storage sites.

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