CHARACTERIZATION OF CARBONATE RESERVOIR AT BATURAJA FORMATION WITH AVA SIMULTANEOUS INVERSION GRADUATE PHYSICS PROGRAM
The need for hydrocarbon-based energy in Indonesia is increasing every year. The increasing number of hydrocarbon need that continues to increase must be accompanied by an increase in the number of reserves owned. Therefore, it is necessary to do hydrocarbon exploration to find new oil and gas reser...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/62132 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The need for hydrocarbon-based energy in Indonesia is increasing every year. The increasing number of hydrocarbon need that continues to increase must be accompanied by an increase in the number of reserves owned. Therefore, it is necessary to do hydrocarbon exploration to find new oil and gas reserves. One of the basins that have the potential for hydrocarbon exploration is North West Java Basin at Baturaja formation. The purpose of this study is to characterize the carbonate reservoir at Baturaja formation, namely to determine the distribution of hydrocarbon fluids and porosity in the formation. If the result of the seismic inversion produced is only acoustic impedance parameter, it will lead to ambiguity in the interpretation. To overcome this problem, the simultaneous inversion method is used. Simultaneous inversion is included in the classification of seismic inversion using pre-stack data that applies the AVA concept to produce inversion results in the form of acoustic impedance, shear impedance, and density simultaneously. These parameters can be transformed into other parameters in the form of ???????? (incompressibility), ???????? (rigidity), ????/???? ratio, Vp/Vs ratio, and porosity which can be used to improve interpretation in characterizing reservoirs.
The carbonate reservoir in the Baturaja formation can be classified into tight and porous carbonate rocks. Tight carbonate have porosity below 10% with acoustic impedance values of 11801.38-13600 (m/s*gr/cc) and ???????? 45-60 (Gpa*gr/cc) while porous carbonate have porosity above 10% with acoustic impedance values of 5600-11801.38 (m/s*gr/cc) and ???????? 10-45 (Gpa*gr/cc). The distribution of hydrocarbon in this formation tends to have low acoustic impedance values in the range of 5600-9600 (m/s*gr/cc) with a Vp/Vs ratio of 1.5-1.81 or a ????/???? ratio of 0.2-1.3. |
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