PENENTUAN ZONA PROSPEK HIDROKARBON DENGAN MENGGUNAKAN ANALISIS SEISMIK ATRIBUT DI LAPANGAN “HANUM”, CEKUNGAN SUMATERA SELATAN; DETERMINATION OF HYDROCARBON PROSPECT ZONE WITH SEISMIC ATTRIBUTE ANALYSIS IN “HANUM” FIELD, SOUTH SUMATERA BASIN

Kurniawan, Wisnu S, Sismanto

2015 | Skripsi | FMIPA UGM

Geophysical studies have been conducted to determine the zones of hydrocarbon prospect in the “HANUM” field, South Sumatera Basin using derrivative of seismic attributes instantaneous frequency and relative acoustic impedance. Data used in this study includes well log data, seismic data and geological data. This research uses Direct Hydrocarbon Indicator, instantaneous frequency and relative acoustic impedance seismic attribute analysis as a method for determining the low frequency zone and also relatively low acoustic impedance which is closely related to the area of hydrocarbon prospects. The results of this analysis are then compared with the calculated log as control analysis. The zones are then delineated as a zone of hydrocarbon prospects are used to determine the position of subsequent development wells. Hydrocarbon prospect zone obtained from the seismic attribute analysis, overlayed by fluid contact data obtained based on interpretation of log data supported by drill stem test data, so that the data will be obtained delineation zone which is a corrected hydrocarbon prospect zone. From the instantaneous frequency and relative acoustic impedance map is shown clearly that the distribution of reservoir rocks is in the yellow-red areas which is characterized with low relative acoustic impedance and also low instantaneous frequency, oriented according to the sedimentation direction which is northwest-southeast and generally located on the anticline bordered by faults as trap rock. On the Intra Gumai A and Lower Talang Akar reservoir, when the frequency and acoustic impedance’s low so that the reservoir layer is thicker. While the otherwise character is shown by Intra Gumai B, Intra Gumai C, Upper Talang Akar and Basement reservoir. This is due to differences in the ratio of the amount of sandstone and shale in each zone of the reservoir layer.

Kata Kunci : Instantaneous frequency; relatif acoustic impedance; direct hydrocarbon indicator; fluid contact