f Petroleum Source Rock Evaluation Of The Sebahat And Ganduman Formations, Dent Peninsula, Eastern Sabah

The Sebahat and Ganduman formations of Miocene-Pliocene age comprise part of the Dent Group.<br>The onshore Sebahat and Ganduman formations form part of the sedimentary sequence within the Sandakan<br>Sub-Basin which, to a large extent is located in the southern portion of the Sulu Sea off eastern Sabah. The<br>Ganduman formation lies conformably on the Sebahat Formation. The shaly Sebahat Formation represents the<br>distal facies of a holomarine deposit while the sandy Ganduman Formation represents the proximal unit of a<br>fluvial-deltaic system (Ismail Che Mat Zin, 1994). In the offshore, these formations are currently being<br>investigated for their respective hydrocarbon potential. However, the available data on probable source rocks<br>and their quality is sketchy. Thus, the present study has been undertaken to evaluate the oil-generating<br>potential of the sediments from these two formations. The analyses performed include determination of Total<br>Organic Carbon (TOC) content, bitumen extraction, Rock-Eval pyrolysis, Pyrolysis-GC, vitrinite reflectance<br>and maceral analysis.