Correlation of Stratigraphic and Structural Framework of Begal Basin

Prolific hydrocarbon accumulations in eastern part of Bangladesh indicate the presence of active petroleum systems in the Bengal basin. Petroleum system analysis of the Bengal basin using available sand–shale percentage and organic carbon content, rock-eval pyrolysis and geological data help us to determine the probable Kitchen areas. Bakhrabad Gas Field being a well known gas field in the basin area, has been chosen for applying current methodology and then apply the same technique to an unknown Sariakandi-Madarganj area in the shelf-slope area. Detailed structural and seismo-stratigraphy of the Bengal basin have been established. Regional depth contour maps of different seismo-stratigraphic horizons of Madarganj-Sariakandi and Bakhrabad areas have been prepared to determine the sedimentary structures and spatial distribution of the stratigraphic units. In areas where there were no wells pseudo wells have been generated from those depth contour maps for the purpose of determining the kitchen areas. The analysis revealed presence of type I, II, and III kerogens. Petroleum systems analysis of Basin area (Greater Bakhrabad) and Shelf area (Madarganj-Sariakandi) areas revealed hydrocarbon generation, expulsion and potential of the Bengal basin and this may lead to new discoveries in future.