Comprehensive Approach of Reservoir Quality Through Carbonate Type Identification in Early Miocene Carbonate Plays, Central Luconia

Abstract

Summary The Central Luconia province in offshore Sarawak, features extensive development of Middle to Late Miocene isolated carbonate platforms that developed on post-rift horst palaeo-highs. Carbonate deposition in the Central Luconia Province started during the Early Miocene and continued until the present day in some areas. Two major factors controlling carbonate sedimentation in the Central Luconia province are the regional tectonics and eustatic sea level changes ( Ting & Aljaadi, 2011 ). The remaining underexplored of Early Miocene carbonates have very limited penetrations hence understanding the presence and quality of the reservoir persists as a challenge. The lack of analogue for these plays unveiled the comprehensive approach in determining the reservoir quality through carbonate type identification. The aim of this paper is to share the different types of carbonates identified occurs during Early Miocene. Classifying these carbonates into different carbonate types and models helps to further shift the understanding of the carbonate quality in different geological depositional settings. Both global and nearby analogue of reservoir properties were adopted to these different carbonates typing. The details seismic facies work has identified 6 different types of Early Miocene carbonates build ups which have major impact on the understanding of Early Miocene paleogeography in Sarawak Basin.