INTERPRETASI SEISMIK FORMASI BATU RAJA PADA AREA “X”, CEKUNGAN SUMATRA SELATAN

Abstract

The South Sumatra Basin is a Tertiary basin with significant hydrocarbon potential, particularly in the carbonate-dominated Batu Raja Formation. This study aims to interpret seismic data in Area "X" to identify potential hydrocarbon zones using well log correlation, well seismic tie, seismic attribute analysis, and structural mapping. Results show that Batu Raja Formation thickness varies from 235.13 ft (FA-3) to 288.77 ft (FA-2). Well seismic tie analysis using a Ricker wavelet (59 Hz for FA-1, 42 Hz for FA-3) confirms peak reflectors for horizon picking. RMS Amplitude reaches 0.8, and Sweetness 1.2, indicating potential hydrocarbons near FA-3. Time structure maps reveal Batu Raja Formation depths of 1750–2350 ft (top) and 2650–3360 ft (base). Isochron and isopach maps indicate a thickening of 90–105 ms and 280–315 ft, respectively, suggesting a prospective hydrocarbon zone. This study concludes that Batu Raja Formation exhibits hydrocarbon potential, particularly in the thickened zones. Further analysis of fault structures and additional seismic attributes is recommended for more accurate interpretation.