Petroleum Geology and Exploration Potential of Shwebo Basin,Myanmar

Shwebo Basin is the back-arc basin developed and formed on the basis of Paleozoic marginal sea basin.The tectonic evolution of Shwebo Basin can be described in terms of an early stage of marginal sea basin and a later stage of back-arc basin.The primary source rocks,reservoirs and seals had formed in the second stage.Eocene source rocks generated a mass of hydrocarbon characterized mainly by gas from Oligocene to Miocene.The assemblage of self-generated and self-preserved reservoir was the most important type in the Eocene Formation,and the Oligocene reservoir can also accumulated hydrocarbon from the Eocene source through faults.There are thrust faulted traps in western basin and flower structure traps and fault anticline traps along the Sagaing strike fault in eastern basin.There are two potential exploration targets,Shwebo-1faulted anticline traps in the Eocene and Oligocene formation in western basin,and Reef anticline traps in the Eocene and Oligocene formation in eastern basin.