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The AAPG/Datapages Combined Publications Database

Indonesian Petroleum Association

Abstract


22nd Annual Convention Proceedings (Volume 1), 1993
Pages 99-110

Pressure Transient for Interference Test Data in Kamojang Geothermal Wells Using New Concept of Fractal Model

Salis S. Aprilian, Doddy Abdassah, Leksono Mucharam, R. Sumantri

Abstract

This paper presents the application of a new concept of fractal model for analyzing pressure transient test data in a complex naturally fractured geothermal reservoir.

Application of conventional type curves has been unsuccesfully in analyzing and interpreting the interference test results in Kamojang geothermal reservoir which is considered as a complex naturally fractured system. Using the conventional type Previous HitcurveNext Hit method, the pressure test data, in this case, can not match to the Previous HitcurveNext Hit, primarily at early time data. The match, however, can be achieved by using the type curves generated based on "fractal reservoir model" which has been developed in this study. Using the diffusivity equation of fractal reservoir, the equation for interference test has been derived and the result is then used for generating a new type Previous HitcurveTop method. In addition, the procedure to use this model has also been developed.

Using the generated type curves, application has been performed on analyzing the interference test data from Kamojang geothermal reservoir. The analyzing results demonstrate the viability of the model in describing characteristics of the reservoir such transmissibility, storativity, and fractal dimension of the medium.


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