Mineralogical Analyses for Reservoir and Caprock Integrity Study of a Potential CO2 Storage Site

Summary In offshore East Malaysia, there is a plan to repurpose depleted hydrocarbon fields to become a potential CO2 storage. One of the identified depleted fields is N Field, a nearly depleted carbonate gas field with minimal oil production. Despite having around 111 m of reservoir core samples, many core plugs from the N-3 well were extracted for routine core analysis (RCA), leaving only limited samples in the reservoir sections. On the other hand, the N-3 well’s caprock samples were only around 3.5 m and were not properly preserved, making them dehydrated, disintegrated, and fractured, and therefore not suitable for analysis.