Abstract
On the basis of high-resolution 2D and 3D seismic data as well as some well data, an integrated seismo-geological study was carried out in order to analyze the Tertiary structural characters and deepwater sedimentary system and to forecast play potential of the east Bengal Basin. Three structural belts are divided in the east Bengal Basin (from east to west): fold and thrust belt, gentle fold belt and abyssal plain belt. And six different types of architectural elements are recognized: canyons, slope channel complexes, channel-levee complexes, individual channels, lobes and mass-transport complexes, which range in character from slope facies to basin-floor facies. Controlled by the depositional evolution, the Miocene-Pliocene depositional lobes and channel complexes are likely to be the best reservoir targets in the study area. Three plays are proved in the east Bengal Basin: Pliocene stratigraphic-structural play (Major), Upper Eocene play and Miocene play (Minor). Pliocene submarine fan sandstones are major reservoirs in gentle fold belt and abyssal plain belt, whereas Upper Eocene and Miocene sandstones can form reservoirs in fold and thrust belt. The east Bengal Basin bears exploration potential and numerous deepwater prospects remain to be explored.
Published Version
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