Abstract:

Late Oligocene source rock in Block 09-3/12 of Cuu Long Basin was evaluated to be high potential of generating oil and gas and supplying hydrocacbons to the traps in the area. This research used geochemical data analysed from rock samples that were collected from the wells in Block 09-3/12 for assessment of the quantity, quality and thermal maturation of organic matter. The results show that Late Oligocene sediments are categorised as source rocks in terms of organic matter richness and hydrocacbon potential. TOC= 0.54- 5.85 %wt, HI = 196- 579 mg/g. Late Oligocene source rock consist of mixture of type I and II kerogens, sourced from freshwater alge material and accumulated in lacustrine/ estuarine environment and has excellent generation oil potential. Source rocks of the lower part of Late Oligocene maturated (Ro>0.55%), could supply hydrocarbons to the traps in the studied area