Abstract

Rudrasagar field of North Assam shelf is one of the oldest field of India and first discovered field in Eastern India. The Field was discovered in 1960 and put on production in1966 from 12 wells. Hydrocarbon accumulation is confined mostly to the topmost part of arenaceous unit of Barail group sand of Oligocene age named as Barail main sand (BMS), which is the main pay in the field. The main BMS pool has been dissected by faults into five blocks, viz. Block-I- IV and Block -145 in the southern part. Beside BMS, sands within Barail Coal Shale (BCS) of Oligocene age and Tipam sand (TS- IV