Bulletin of the Geological Society of Malaysia, Volume 36, Dec. 1994, pp. 105-117
PETRONAS Carigali Sdn. Bhd., Wisma Peladang, Jalan Bukit Bintang, P.O. Box 12407, 50776 Kuala Lumpur
Abstract: The Oligocene to Early Miocene sediments penetrated by several wells in the onshore Balingian and also outcropping in the area were deposited in predominantly Lower Coastal Plain environment of deposition. Based on the present stratigraphic framework, whereby the Tertiary sediments in the Sarawak Basin were subdivided into seven (7) sedimentary cycles, these sediments are of age equivalent to the Cycle I and II.
By applying the sequence stratigraphic techniques, the Cycle I sediments in the area can be subdivided into several sequences. In brief, the sequence stratigraphic technique subdivides the sedimentary succession into the smallest unit of lamina to the highest hierarchy called sequence. The sequence is defined as a relatively conformable succession of genetically related strata bounded by unconformities or their correlative conformities. The sequence can be further subdivided into system tracts based on objective criteria including types of bounding surfaces and the position within the sequence.
The established sequence boundaries which provide the basis for the regional mapping and well correlation, helped in the understanding of the depositional setting and reservoir distribution for the non-marine sequences.