ANALISIS PETROFISIKA MENGGUNAKAN PERSAMAAN LUCIA UNTUK PERFORASI BARU PADA RESERVOIR KARBONAT, LAPANGAN RIMBA CEKUNGAN JAWA TIMUR UTARA; PETROPHYSICAL ANALYSIS USING LUCIA’S EQUATION FOR NEW PERFORATION AT CARBONATE RESERVOIR, RIMBA FIELD NORTH EAST JAVA BASIN

Rahayu, Dewi M, Ade Anggraini

2015 | Skripsi | FMIPA

RIMBA field is located in North Madura Platform, North Java Basin. Geology review shown that area of study is dominated with carbonate unconventional reservoir. The differences between unconventional reservoir and conventional reservoir (sandstone) become encourages to use different method in petrophysical analysis, in this case using Lucia’s Equations. Lucia’s Equations known as empirical equation based on laboratory study of various type carbonate rocks to estimate value of petrophysical parameters. Aim of this study is to define perforation points based on petrophysical analysis. Object of this study is potential reservoir formation as Kujung I, Kujung II, Upper Ngimbang dan Ngimbang Carbonate. Initial data used in this study are wireline data (AGE-1, AGE-2, AGE-3, AGE-4 and AGE-5) and geology data as tectonic, stratigraphy, mudlog, petrography, drill steam test and core. Lucia’s equation in this study used to estimated parameters porosity (combine with Batemen and Konen’s Equations), saturation water (combine with Archie’s Equation) and permeability. Results shown Kujung I as optimum reservoir that has averages 14% shale volumes, 16% effective porosity, 17% interparticle porosity, 64% saturation water and 6,1 mD permeability. Reservoir thickness estimation of RIMBA field relatively increased from north to south: AGE-5, AGE-2, AGE-3, AGE-1, and AGE-4. Perforation points for well AGE-1 are 4509 feet and 6414 feet. Perforation points for well AGE-2 is 4737 feet. Perforation points for well AGE-3 are 4777 feet. Perforation points for well AGE-4 are 6777 feet. Perforation points for well AGE-5 is 5010 feet.

Kata Kunci : carbonate, emphiric; Lucia; lumping; petrophysics; perforation; unconventional