Identifikasi karakteistik shale oil pada formasi Talang Akar, Cekungan Ardjuna tengah dilakukan terhadap beberapa parameter, yaitu dengan melihat total organic carbon (TOC), brittleness index (BI) dan maturity (kematangan). Dalam menganalisis parameter-parameter tersebut, digunakan beberapa metode antara lain metode geokimia, metode mineralogi, metode petrofisik, metode crossplot dan interpretasi seismik. Dalam geokimia, kekayaan material (TOC) memiliki kategori good, dengan tipe material berupa tipe kerogen 1-II yang cenderung menghasilkan minyak, dengan jendela awal kematangan (early mature) berada disekitar 7900 ft. Indeks kegetasan (BI) berada pada kategori less brittle-brittle (0.32-0.64). Dari analisis petrofisika ketebalan serpih yang ada di daerah penelitian berkisar 120-150 ft dan Pemodelan TOC didapatkan regresi sebesar 0.6986 terhadap parameter log (log Gamma ray, log Density, log Neutro-Porosity, log Sonik, dan Log Resistivity). Dalam interpretasi seismik, untuk melihat sebaran serpih, digunakan net shale ratio yang dihubungkan dengan nilai RMS dari ekstrak amplitudo, didapatkan zona dengan window 20 ms di dalam zona interest ( TOC 4.1523 %, BI 0.3869 v/v) memiliki regresi sebesar 0.5889. Untuk zona interest yang memiliki potensi serpih berada disekitar cekungan dengan volumetric oil in place sebesar 46.68 MMBO. Dan untuk parameter antara TOC, BI dan kematangan, tidak memiliki hubungan secara langsung tetapi memiliki peranan penting dalam menentukan potensi yang terkandung dalam shale.

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Examining total organic carbon (TOC) brittleness index (BI) and maturity parameters. In analyzing said parameters, various methods are used including geochemistry method, mineralogy method, petrophysics method, crossplot method, and seismic interpretation. In geochemistry method TOC resulted in good category with material type of kerogen 1-II which usually produces oil with an early maturity window in approximately 7900 ft. Brittleness index resulted in less brittle-britlle category. Petrophysics analysis resulted in shard thickness between 120-150 ft in the research area and TOC modelling resulted in 0.6986 regression coefficient towards log parameters (gamma ray log, density log, Neutro-Porosity log, sonic log and resistivity log). In seismic interpretation to examine the shard distribution a net shale ratio that is linked with RMS value from amplitude extract is used, with a result of a zone with 20 ms window in the interest zone (TOC 4.1523 %, BI 0.3869 v/v ) and 0.5889 regression coefficient. The interest zone that has shard potential exists somewhere in the basin with volumetric oil in place value of 16.68 MMBO. The parameters of TOC, BI and maturity doesn?t have any direct correlation but they does have an important role in determining potential contained within shale.;examining total organic carbon (TOC) brittleness index (BI) and maturity parameters. In analyzing said parameters, various methods are used including geochemistry method, mineralogy method, petrophysics method, crossplot method, and seismic interpretation. In geochemistry method TOC resulted in good category with material type of kerogen 1-II which usually produces oil with an early maturity window in approximately 7900 ft. Brittleness index resulted in less brittle-britlle category. Petrophysics analysis resulted in shard thickness between 120-150 ft in the research area and TOC modelling resulted in 0.6986 regression coefficient towards log parameters (gamma ray log, density log, Neutro-Porosity log, sonic log and resistivity log). In seismic interpretation to examine the shard distribution a net shale ratio that is linked with RMS value from amplitude extract is used, with a result of a zone with 20 ms window in the interest zone (TOC 4.1523 %, BI 0.3869 v/v ) and 0.5889 regression coefficient. The interest zone that has shard potential exists somewhere in the basin with volumetric oil in place value of 16.68 MMBO. The parameters of TOC, BI and maturity doesn?t have any direct correlation but they does have an important role in determining potential contained within shale.