The NNG Discovery: A New Oil Play in the Pre-Cycle I Basement, Offshore Sarawak

Nuang-1 was drilled in 2015 as exploration wildcat by PETRONAS in Sarawak Basin. The well is located in the western part of the Tatau Half Graben Sub-Province, in the Open Block SK304B (Figure 1). The Tatau Half Graben Sub-Province has been neglected due to high concentrations of carbon dioxide (CO2) and nitrogen (N2). For instance, H2.2X encountered 50% CO2 and 30% of N2 (M.B. Idris, 1992).