Abstract

Rudrasagar oil field in Assam & Assam Arakan Basin of India was discovered in 1960. The reservoir unit known Barail Main Sand (BMS) of Eocene to Oligocene is the pay sand in the field. An attempt has been made to understand the reservoir facies distribution over the field through seismic inversion study of the 3D seismic data in the area. The study has resulted in establishing relation between acoustic impedance and pay thickness. Seismic attributes generated from the acoustic impedance (AI) volume have also helped in understanding the facies distribution over the area.