Abstract

85 Degree East Ridge is a prominent structural feature in the deep to ultra deep water regime of East coast of India. In the recent times a lot of scientific study has been done to understand the genesis and importance of this ridge system for hydrocarbon exploration. Many operators have acquired 2D and 3D seismic data set to understand the ridge geometry. The present paper focuses on the internal architecture of the ridge which could be helpful in characterizing the ridge genesis. Well developed prograding seismic reflectors have been found below the acoustic basement. These interesting features give an insight to the process which accompanied ridge formations. Prograding events identified in the seismic data can be due to delta formation in a clastic depositional regime or it can also form due to lava flow. The Present study supports the formation of lava delta in the region during the formation of the ridge. Characterizing these lava deltas has been helpful in predicting a hydrocarbon system in the region.