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The AAPG/Datapages Combined Publications Database

Southeast Asia Petroleum Exploration Society (SEAPEX)


Proceedings of the South East Asia Petroleum Exploration Society Volume IX, 1990
Pages 100-111

The Integration of Geophysical, Geological and Petrophysical Data: A Case Study in North West Java, Indonesia

M. Koswara, J. Negre, L. Hendrata


The structure under study is located in North-West Java, Indonesia. Two exploratory wells which were drilled within this structure in 1988 and 1989, have encountered accumulation of hydrocarbon in a carbonate formation.

The primary objectives of the study are to determine its reservoir geometry including the computation of hydrocarbon volume in place, and to evaluate the hydrocarbon potential of this carbonate formation within its neighboring structures.

The study is an integration of the analysis and interpretation of all available data: Surface Seismic data, Wireline Geophysical-Geological-Petrophysical data, Core data, and Production Test Data.

However, the limited number of wells, and consequently also of data, would not allow certain key parameters, such as the porosity, to be mapped with a reasonable confidence. For this reason, a “Seismic” Porosity was determined, first by matching Surface Seismic data to Wireline Geophysical data (VSP), then the “matched” Surface Seismic data was further inverted to Acoustic impedance. And finally this “Seismic” Acoustic impedance was converted to “Seismic” Porosity, using a transform previously established between Wireline Acoustic impedance and Wireline Porosity. Subsequently, the prospectives of its neighboring structures were also evaluated utilizing the same method.

Recommendations on development of the main structure and the drilling plan of its nearby structure are based on this study.

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