IDENTIFICATION OF CARBONATE RESERVOIR PROSPECTIVE ZONES USING ROCK PHYSICS APPROACHES AND EXTENDED ELASTIC IMPEDANCE (EEI) IN

• Main Author: Amarta Prayoga, Bima
• Format: Theses
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/53162
• Institution: Institut Teknologi Bandung

One type of reservoir that has considerable potential is carbonate reservoir. However, carbonate reservoirs have heterogeneity properties related to pore shape so it is necessary to approach rock physics first before seismic inversion is carried out in order to know the carbonate prospect zone. The approach of rock physics conducted by matrix modulus estimation using krief et al equation, (1999) in ?ma and aspect ratio estimation using modification of Kumar and Han model (2005) shows prospect carbonate SW < 0.75 and porosity > 10% has aspect ratio range of 0.10-0.30 dominated by pore shape reference Pore + stiff pore. Seismic inversion shows that with extended elastic impedance approach produces elastic parameters from LambdaRho in accordance with EEI reflectivity (3300) and Mu-Rho matched with EEI reflectivity (710) there are porous carbonates (Mu-Rho 26-33 GPa*g/cc) and hydrocarbons saturated (Lambda-Rho < 50 GPa*g/cc) located in the middle area (around the well) where the lateral spread is getting thinner with a thickness of up to 10 ms. Based on geological studies that the Baturaja Formation formed due to the existence of a relatively tight platform and relatively porous reef has the suitability of rock physics modeling and seismic inversion using extended elastic impedance that indicates the carbonate reservoir on the reef part of the field "BAP" is a type of good quality reservoir with high porosity and hydrocarbons saturated.