KARAKTERISASI RESERVOIR MENGGUNAKAN ANALISIS INVERSI IMPEDANSI AKUSTIK DAN MULTI ATRIBUT SEISMIK PADA LAPANGAN “FUTSAL”, FORMASI TALANG AKAR, CEKUNGAN SUMATRA SELATAN ; RESERVOIR CHARACTERIZATION USING ACOUSTIC IMPEDANCE INVERSION AND MULTI ATTRIBUTE SEISMIC ANALYSIS IN, "FUTSAL" FIELD, TALANG AKAR FORMATION, SOUTH SUMATRA BASIN

PUTRA, DIMAS TITO MAULANA, Sismanto

2016 | Skripsi | FMIPA

South Sumatra Basin is a sedimentary basin which is located at the Southern of Sumatra Island. Its stratigraphic information shows that Talang Akar Formation, which consist of sandstone and shale is potentially become reservoir rock. Because of that, a study is conducted to analyze the physical character of sandstone reservoir in “Futsal” field, Talang Akar Formation. The data used in this study are well data, seismic data and marker data. Acoustic impedance model based inversion and multi attributes analysis were used to show reservoir character in Talang Akar Formation. Acoustic impedance volume from inversion and seismic data were used for multi attributes analysis to obtain gamma ray and neutron porosity volume that can be used for lithology interpretation. The results show that acoustic impedance, gamma ray, and neutron porosity can differentiate each lithology. Sandstone has acoustic impedance range 27000-34000 ft.s-1.gr.cc-1, gamma ray is 70-120 API, neutron porosity is 10-20%. Slicing process was performed in the middle of UTAF_C and UTAF_D horizon to identify reservoir distribution. New development well (DIM - 4) can be placed in the southern DIM – 2 well .

Kata Kunci : inversion, multi attribute seismic, gamma ray, acoustic impedance