ANALISIS INVERSI IMPEDANSI AKUSTIK DAN MULTIATRIBUT SEISMIK PADA DATA SEISMIK 2D UNTUK MENGIDENTIFIKASI KARAKTERISTIK RESERVOAR PADA LAPANGAN NH JAWA TENGAH

This study uses Acoustic Impedance Inversion method for the analysis of rock acoustic impedance and seismic multiatribut analysis for reservoir characteristics analysis on 2D seismic data in the Field \"NH\", North East Java Basin. Reservoir zone in this area is a reservoir calcareous sandstones based on geological data, drilling data (well logs), and petrophysical analysis. Inversion of seismic data and seismic analysis performed on the field multiatribut \"NH\" to know the characteristics of the reservoir sandstones with 3 control wells. The study was conducted by analyzing the character of the target reservoir zone daridata logs, perform acoustic impedance inversion with the inversion method multiatribut modelbased and seismic analysis to determine the reservoir characteristics of the field \"NH\". The results of the sensitivity logs analysis shows that the result on the target reservoir area high impedance. Based on the results of the acoustic impedance inversion and the results of the sensitivity logs analysis, the value of acoustic impedance in the reservoir is at 24313�30500 ft.s-1.gr.cc-1 and gas content value of acoustic impedance in reservoir is at 22000-23000 ft.s-1.gr.cc-1 Analysis of seismic multiatribut have known that the target reservoir characteristics of the low value of gamma ray attribute and density attribute values are quite high