Abstract

Sediment deposition in deep water environments takes place mainly as a) Submarine fan depositions and turbidites and b) Mass flow sediment depositions like debris flow, grain flow, slides and slumps. Lawrence,D.A et al (2003) and Johansson,M. (2003) have described recognition of some of these features from Borehole image logs. The present study pertains to a cretaceous sandstone formation S-II from Well-A and Well-B belonging to Tranquebar sub-basin of Cauvery Basin, South India. Examples presented clearly show debris flow, grain flow, shale-sand laminations,slumps and turbidites on Borehole image log. Some of these features can be interpreted from Dipmeter also. Two objects were tested in Well-A out of which one flowed hydrocarbons and the other water. Borehole image logs against these two objects show the differences in the reservoir facies.