South Sumatra Basin is a Cenozoic back-arc rift basin experienced four tectonic evolution stages and a full cycle of transgression-regression.As a result

the basin presents a unique sequence stratigraphy and sedimentray filling pattern and contains diversified depositional systems:lacustrine

fluvial

delta

shallow marine shelf carbonates

organic reef and etc.The Block B in the basin was studied in detail and its sequence stratigraphic framework was established.The Cenozoic strata in the block were divided into eight third-order sequences with Sq1 to Sq4 as the key exploration targets.Based on its paleo-geomorphic characteristics

four structural units with different sedimentary characteristics and exploration target were identified.Vertically

four plays were identified within the sequence stratigraphic framework based on summation of each structural evolution stage.Laterally

the hydrocarbon accumulation conditions were comprehensively analyzed by using structure overlapping method after structure interpretation of each stage

leading to the identification of five prospective structural zones.The study offers a sound foundation for further exploration and development of the block.