Subsurface Mapping of the Beani Bazar Anticlinal Structure of Surma Basin, Bangladesh

The Beani Bazar structure is located along the eastern margin of the Surma basin, Bangladesh. This paper presents the results of interpretation of seismic and well data from this structure. Based on the analysis of seismic data and their corelation with well information, seven reflecting horizons could have been identifed, viz top of the Bhuban Formation (Middle Miocene), the lower gas sand, the upper gas sand, the Bokabil Formation (Upper Miocene), the Tipam Sandstone Formation, the Girujan Clay Formation and the Dupi Tila Formation (Plio-Pleistocene). Structural analysis shows that the Beani Bazar is a N-S trending unfaulted anticlinal structure with eastern flank slightly steeper than the western one. The gas producing sands of the Beani Bazar structure belong to Bokabil Formation. The seismostratigraphic study of this area allows to resolve all the formations in the section.