Abstract

The project in Cambodia is to confirm the presence of gravity lows, determine depth to basement, locate areas with large-scale structures and identify potential petroleum systems.

There have been at least three main phases of uplift and erosion of pre Tertiary age identified in the Kampong Som and Tonle Sap Basins, onshore Cambodia. The basins surrounding the Tonle Sap Lake seem to have at least 5-6 km of Mesozoic and older aged sediments as identified by seismic data and gravity modeling. Potential Triassic and Permian age source rocks are mature for oil and gas over large parts of the basins. Oil could potentially be sources from late Triassic organic rich lacustrine shales while gas is potentially sources from Upper Carboniferous to Lower Permian marine shale. There are numerous potential leads in the area, inverted structures due to the Indonesian uplifts and Himalayan Orogeny with Mesozoic clastic reservoirs and carbonate buildups. The Tonle Sap Basin NE-NE seems to have potential Triassic and older petroleum systems while the Tonle Sap Basin SW has potential Mesozoic-Paleozoic petroleum systems.

Keywords: Phu Quoc Basin • Khorat Plateau • Mae Ping Fault Zone • Kuchinarai Group • Si That Formation

Presented at: 2009 South East Asia Petroleum Exploration Society (SEAPEX) Conference, Singapore, 2009