Abstract: Southeast Asia is one of the important oil and gas producing regions in the world. There are more than 100 sedimentary basins in this region. Currently, oil and gas are found in 47 basins. The ultimate oil and natural gas reserves in Southeast Asia are 233.7 × 108t and 26.5 × 1012m3, accounting for 7.5 percent and 8.1 percent of the world's total respectively. The nations with great petroleum exploration potential include Indonesia, Thailand, Myanmar and Brunei