CARBONATE RESERVOIR CHARACTERIZATION USING ACOUSTIC IMPEDANCE INVERSION METHOD OF KUJUNG-I FORMATION, “ACP” FIELD, EAST JAVA BASIN

• Main Author: Cahyani Putri, Amelia
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/68714
• Institution: Institut Teknologi Bandung

The East Java Basin is a productive basin and one of Indonesia's largest oil and gas reservoirs. The "ACP" field is located in the East Java Basin and is included in the North Madura Carbonate Platform complex. Stratigraphically, this field is included in the Kujung Formation of the East Java Basin. The Kujung Formation is a limestone hydrocarbon reservoir. Due to the considerable hydrocarbon potential, this study aims to determine the reservoir characteristics of the Kujung Formation. Using seismic inversion, we can find the distribution of acoustic impedance in each layer which is more interpretive in mapping the subsurface conditions. The polynomial relationship between the two acoustic impedances and the log porosity is used to estimate the value of rock porosity in the Kujung I Formation. The inversion results show a variation of the acoustic impedance value from low to high so that it can classify the reservoir body in the form of Carbonate Reef Build Up starting from the carbonate platform, main porous zone, up to the upper tighter zone. The porosity in the "ACP" field can be predicted from the impedance value using a polynomial equation. Prediction of carbonate reefs that may be reservoirs using time to depth domain conversion