PERHITUNGAN KETIDAKPASTIAN VOLUMETRIK CADANGAN HIDROKARBON MENGGUNAKAN ANALISIS PETROFISIKA DAN INTERPRETASI SEISMIK PADA FORMASI BERAI MUDA DI LAPANGAN “ALAN” CEKUNGAN MAKASSAR SELATAN; HYDROCARBON RESERVES VOLUMETRIC UNCERTAINTY CALCULATION USING PETROPHYSICAL ANALYSIS AND SEISMIC INTERPRETATION OF UPPER BERAI FORMATION OF “ALAN” FIELD SOUTH MAKASSAR BASIN

Koespinadi, Dick Alan, Sismanto

2016 | Skripsi | FMIPA

Hydrocarbon reserves calculation are obtained using petrophysical analysis and seismic interpretation. Petrophysical analysis is used to obtain reservoir properties’ value such as shale volume, porosity, water saturation, and permeability. Seismic interpretation is used to obtain gross reservoir volume. Those parameters are used to calculate hydrocarbons reserves of “ALAN” Field located in South Makassar Basin. Based on petrophysical analysis result of three wells of Upper Berai Formation of “ALAN” Field, average shale volume is 5.49 percent, average porosity is 12.79 percent, average water saturation is 32.73 percent, and average permeability is 8.5 mD are obtained. Gross reservoir volume values for checkshot modelling is 740,821,370 m3, for marker modelling is 811,151,017 m3, and for interval velocity modelling is 703.780.301 m3, are obtained from seismic interpretation result. Gas reserves volume for 1P is 61 BCF, 2P is 219 BCF, and 3P is 550 BCF, are obtained from uncertainty analysis resul

Kata Kunci : uncertainty analysis, gas reserves, seismic interpretation, petrophysics