Open AccessHydrocarbon Mapping on Reservoir Carbonate Using AVO Inversion Method
Author(s) -
Dendy Setyawan
Publication year - 2021
Publication title -
jpse (journal of physical science and engineering)
Language(s) - English
Resource type - Journals
ISSN - 2541-2485
DOI - 10.17977/um024v6i12021p019
Subject(s) - carbonate , geology , lithology , inversion (geology) , lambda , amplitude versus offset , mineralogy , reservoir modeling , prestack , carbonate rock , amplitude , horizon , petroleum reservoir , petrology , geomorphology , petroleum engineering , seismology , geometry , sedimentary rock , chemistry , physics , geochemistry , mathematics , optics , organic chemistry , structural basin
Amplitude Versus Offset (AVO) inversion has been applied for reservoir analysis focused on the horizon carbonate Peutu and Belumai. Simultaneous inversion analysis is used to determine gas anomaly inside carbonate-rocks and it’s spread laterally around target zones. It is based on the fact that small Vpand Vs value changes are going to show the better anomaly to identify reservoir fluid content. The AVO inversion method applies angle gather data as the input and then it is inverted to produce P impedance (Zp) and S impedance (Zs). Zp and Zs are derived to produce Lambda-Rho and Mu-Rho that are sensitive to fluid and lithology. Value of Mu-Rho between 44–65 Gpa gr/cc while value of Lambda-Rho smaller than 10 Gpa gr/cc (for carbonate-rock filled by fluid). This research found that Lambda-Rho is the best parameter to show the existence of hydrocarbon in the case of gas. While Mu-Rho is the best parameter to show the differences in lithology.