This study aims to understand the controls of the reservoir quality in the East Balingian, Sarawak. Data integration from cores and cuttings (petrography, XRD, porosity & permeability) as well as temperature and pressure data from 23 wells are used. The result observed that most of the wells show porosity reductions (going less than 10%) starting at 2000–2500 mSS and this serves as the crictical depth for porosity preservation in the study area. It was found that this reduction in reservoir quality are affected by mechanical compaction, overpressure, chemical compaction (temperature & diagenesis) and facies grain sizes and clay content. The improved understanding gained from this study is hoped to be used as a guide for near future exploration campaign in the less explored areas in East Balingian basin.


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