CARBONATE RESERVOIR CHARACTERIZATION IN “MAKALALAG” FIELD EAST JAVA BASIN USING SEISMIC STRATIGRAPHY, ATTRIBUTE, AND ACOUSTIC IMPEDANCE INVERSION METHOD

• Main Author: Ridho Pratama Zougira, Mohammad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/53603
• Institution: Institut Teknologi Bandung

In Indonesia and much of SE Asia, some of the largest and most prolific hydrocarbon reservoirs are derived from isolated, shallow-water Tertiary carbonate buildups, which is Cepu block, East Java BasinThe purpose of this research is to characterize the reservoar and know the distribution of reservoirs in Makalalag Field. This study uses 3D PSDM in time data and five well data including three main wells and two wells used to assist interpretation. The target analysis was performed using seismic data and log data. In this field of "Makalalag" carbonate buildup on the horizon TCE acts as a reservoir, in this study conducted seismic inversion of acoustic impedance, seismic attributes, and stratigraphic seismic analysis to understand the relationship between the process of deposition, diagenesa, and physical properties (porosity and pore fluid) of carbonate reservoir rocks in the Makalalag Field. Based on the results of the analysis can be known that the formation of carbonate in the regions in the various eras namely ruppelian 2 – ruppelian 3, chattian 1, and chattian 2 – chattian 3. The variance attribute is used to identify and map general carbonate facies in the research area. Then from the integrating between stratigraphic seismic and acoustic impedance inversion there are facies drowning surface, upper interior platform, lower platform interior, windaward margin, leeward margin, and detrikal, with lower facies of interior platform as Makalalag Field reservoir.