What question did this study set out to answer?

To analyze CO2 injectivity and determine optimal injection strategies in a depleted gas field.

November 14, 2025EnergiesOpen Access

Evaluation of CO2 Injectivity and Geological Storage Scenarios Using Nodal Analysis and Tubing Injectivity Index in a Depleted Gas Field in Malaysia

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Evaluation reveals nodal analysis impacts CO2 efficiency in a depleted gas field, suggesting optimal injection strategies.

To analyze CO2 injectivity and determine optimal injection strategies in a depleted gas field.
Conducted nodal analysis and sensitivity analysis for CO2 injection scenarios.
Estimated reservoir permeability from appraisal well DST report.
Analyzed variables including injection pressure, tubing diameter, and reservoir conditions.
Optimal CO2 injection rate identified as 52.3 MMscfd under base-case nodal analysis.
4.548-inch tubing yielded highest efficiency with 15.11 MMscfd per inch.
5-year CO2 injection scenario indicated pressures exceeded formation parting pressure.

An et al. (2025) studied this question.

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