f Integrated Subsurface Screening in the Selection of Depleted Clastic Field a in Malay Basin for CO2 Storage Development Plan

Monetization of significant hydrocarbon resources in Malay basin is locked owing to high carbon dioxide (CO2) contamination. Also to realize PETRONAS target to reduce overall GHG emission, carbon capture and storage (CCS) has emerged as the leading option. To ensure safe and permanent subsurface storage of CO2, robust screening and selection of storage sites has been identified as the key enabler. CO2 storage in depleted hydrocarbon reservoirs is considered as the most suitable option because of its proven trapping mechanism, abundance of data enabling thorough analysis for containment, capacity and injectivity.

This paper presents results of subsurface screening in order to select a depleted gas clastic field having more than 40 years production from 20 infill wells in Malay basin for CO2 storage. Field A is a 4-way dip closure with gas and condensate reservoirs occurring from the Tertiary Tapis to Pilong formation. Medium fault density and E-W, sub N-S faults are seen from seismic. Reservoir groups are comprised of sequences deposited tidal dominated fluvial, shallow marine, deltaic and coastal depositional environments. Subjected to integrated subsurface evaluation and project risks assessment, its storage plan has been endorsed with detailed MMV planning is ongoing.