Submarine mounds and implication to the exploration shallow reservoir in the Madura Strait, East Java Basin

The study area is located in the Madura Strait, East Java basin with water depths ranging from 25 to 75 m. The objective of this study is to characterise seamounds inside the 3D seismic area, with respect to their implications to the shallow drilling hazards and also their application for exploration at the reservoir level. At least there are two types of seamound in this area: Type I is NY and MM seamound with dimensions length less than 1km, relief structure around 15m, seamound location conformal with the crest of the deeper reservoir structure and seamound masking the deeper image. Type II is ML seamound with dimensions length more than 1km, relief structure around 35m (double that of type I), seamound location is not conformal with the crest of the deeper reservoir structure and seamound is not masking the deeper image, it is confirmed that this type II seamound corresponds to coral reefs.

HR 2D seismic acquisition including analogue geophysical survey will result in better image of the seabed mound and sub seabed. Also advance processing seismic through PSDM needs to be done to get better image in the reservoir interval that was impaired below seamound.