Abstract

Oligo-Miocene clastic rocks of the upper Assam basin deposited in an assymetrical foreland basin formed during the collision of Burma microplate with Indian plate. In this study core, well log and seismic data has been used for interpretation of fluvial sequence stratigraphic architecture of the basin. The fluvial stratigraphic record of Upper Assam basin is mainly controlled by eustasy, subsidence, source area upliftment and sediment supply. The Oligo- Miocene tectono-sequences composed of lower Barail sequence and upper Tipam prograding sequences separated by an unconformity surface. The stratigraphic section from Barail- Tipam sandstone in this study is divided in to succession of inferred tracts Transgressive system tracts (TST) and highstand system tracts (HST). Well logs and seismic data show the depositional environments is deltaic to fluvial during Oligo- Miocene period.