Publications

Seismic, well-log, and core data, illustrate the presence of deltaic as well as shelfal depositional systems within the Main Member of the Upper Cibulakan Formation at the E Field, offshore northwest Java. Seismic amplitude extractions as well as other reflection attributes clearly show the presence of a well-developed channel, likely deltaic in origin, trending east-west. Biostratigraphic and sedimentologic data from cores indicate that the depositional environment of the sediments filling the channel was open marine. Seismic facies analysis using CGG Petrosystem's StratimagicTM neural network-based algorithm suggests a heterolithic facies distribution influenced by the presence of faults.Also within the Main Member, seismic imaging reveals the presence of interpreted sand fields or patches. These features are characterized by a sharply defined linear edge on their western side and by a gradational margin on the remaining sides. Well-log and core data suggest the presence of a ravinement surface at the base of these sand patches. The sediments above this surface contain fine to medium grained sandstones with abundant shell fragments. We interpret that these sand fields-are comprised of sand waves migrating across a possible transgressive surface of erosion. The direction of migration appears to be in the direction of the sharply defined edges to these fields.