Abstract

Oil India Ltd. (OIL) has several old & matured fields viz. Makum-Hapjan, Jorajan, Nahorkatiya and Moran related to the upper Eocene -Oligocene Barail Group and Miocene Tipam group (within around 3000m depth) in Upper Assam Basin, India , wherein the reservoirs are at various stages of depletion. Apart from Tipam & Barail formation, late Miocene Girujan formation is also prospective in places. To sustain hydrocarbon production from these fields, it has been decided to arrest the declining production by finding un-swept/by-passed oil as Well as new hydrocarbon bearing sands within Girujan, Tipam and Barail formations, which are still remain undetected through conventional seismic.