BULLETIN OF THE MARINE GEOLOGY
Vol 38, No 1 (2023)

LITHOLOGY AND RESERVOIR IDENTIFICATION IN THE “EL” WELL, EAST JAVA USING SEISMIC INVERSION

Maulana Yusuf Ibrahim (Geophysics, Faculty of Mathematics and Natural Sciences, Padjadjaran University, Sumedang 45363, Indonesia)
Salma Dita Rysqi Puspita (Geophysics, Faculty of Mathematics and Natural Sciences, Padjadjaran University, Sumedang 45363, Indonesia)
Zhafirah Nurul Syarafina (Geophysics, Faculty of Mathematics and Natural Sciences, Padjadjaran University, Sumedang 45363, Indonesia)
Shaska Ramadhan Zulivandama (Marine Geological Institute, Dr. Junjunan 236, Bandung 40174, Indonesia)
Eleonora Agustine (Geophysics, Faculty of Mathematics and Natural Sciences, Padjadjaran University, Sumedang 45363, Indonesia
Center for Materials and Earth Engineering studies, Faculty of Mathematics and Natural Sciences, Padjadjaran University, Sumedang, 45363, Indo)



Article Info

Publish Date
25 Jul 2023

Abstract

The acoustic impedance inversion seismic method, carried out at the "EL" well in East Java,provides a description of the physical properties of subsurface rocks. This method involves identifying rocklayers, lithology types, porosity values, the presence of hydrocarbons, and fluids in the target zone usingboth well data and integrated seismic data. The data processing included the cross-plotting of acousticimpedance (AI) with gamma ray logs, porosity logs, and resistivity logs. We integrated seismic and welldata, picked horizons, and created AI inversion models. The based model inversion technique was used tocompare the synthetic model with the seismic data, aiming to obtain an AI value that closely represents theactual model. AI seismic inversion effectively separates lithological boundaries vertically and laterally,based on the selected picking horizon and created model. To enhance understanding of the lithology andhydrocarbon prospect zone in the study area, a cross-plot analysis was used to correlate the seismic inversionmodel. The results reveal that the study area represents a hydrocarbon prospect zone, with reservoir rocksconsist of coral and foram at a depth range of 2320 - 2430 ft.

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Journal Info

Abbrev

bomg

Publisher

Subject

Earth & Planetary Sciences

Description

Bulletin of the Marine Geology is a scientific journal of Marine geoscience that is published periodically, twice a year (June and December). The publication identification could be recognized on the ISSN 1410-6175 (print) and e-ISSN: 2527-8843 (on-line) twice a year (June & December) and it has ...