GEOLOGICAL INTERPRETATION OF NORTH MADURA OFFSHORE SEDIMENTARY BASIN BASED ON GRAVITY DATA ANALYSIS

Restu Ningsih, Imam Setiadi, Muh. Sarkowi, Akroma Hidayatika

DOI: http://dx.doi.org/10.32693/bomg.38.2.2023.828

Abstract


The area of north Madura offshore is one of the sedimentary basins within the North East Java Basin which has interesting paleogeographical developments. These developments are the result of various sedimentation processes and changes in the depositional environments. The purpose of this study is to identify subsurface geological structures, delineate sedimentary sub-basins, and estimate sediment thickness. For that, we do spectrum analysis, optimum upward continuation filtering, spectral decomposition analysis, 2D forward modeling and 3D inversion of gravity data. The results of the spectral analysis show that the average thickness of sedimentary rocks in the study area is around 3.788 km. From the gravity data analysis, 10 sedimentary sub-basins were delineated, indicating structural patterns of basement high, grabens, and faults. 2D and 3D modeling revealed four layers of stratigraphy, in order from youngest to oldest are Tertiary-Neogene sedimentary rocks with a density value of 2.1 gr/cc, the Tertiary-Neogene sedimentary rocks with a density of 2.3 gr/cc, the Tertiary - Paleogene sedimentary rocks with a density of 2.45 gr/cc, and the basement layer identified as volcanic igneous rock with a density of 2.67 gr/cc.


Keywords


Gravity method, optimum upward continuation filter, modeling, spectral analysis decomposition, 2D forward modeling and 3D inversion

Full Text:

PDF

References


Fatahillah, Y., 2016. Penentuan Potensi Batuan Induk Menggunakan Model Log TOC, pada Formasi Ngimbang, Lapangan “Arrazi”, Cekungan Jawa Timur Utara. Bachelor thesis. Institut Teknologi Sepuluh Nopember. Surabaya. Unpublished.

Febriansyah, D., Haerudin, N., Suharno, and Setiadi, I., 2017. Studi Pola Sub-Cekungan Hidrokarbon Menggunakan Analisis Spectral Decomposition, Pemodelan 2D Dan Pemodelan 3D Berdasarkan Data Gayaberat Daerah Longiram, Kalimantan Timur. Jurnal Geofisika Eksplorasi, 3 (3): 1-16.

Grant, F.S., and West, G.F., 1965. Interpretation theory in applied geophysics. New York: MC Graw-Hill Book Company.

Koesoemadinata, R.P., 1978. Geologi Minyak dan Gas Bumi. Bandung, ITB.

Pirttijarvi, M. 2008. Gravity interpretation and modeling software based on 3-D block models. User’s guide to version 1.6b. Department of Physics Sciences. University of Oulu. Finland.

Putra, P. S., 2007. Sekuen Pengendapan Sedimen Miosen Tengah Kawasan Selat Madura. Jurnal Riset Geologi & Pertambangan, 17 (1): 20-36.

Satyana, A.H., Erwanto, E., and Prasetyadi, C., 2004. Rembang -Madura -Kangean -Sakala (RMKS) Fault Zone, East Java Basin: The Origin and Nature of a Geologic Border. Proceeding the 33rd Annual Convention & Exhibition of Indonesian Association of Geologist.

Setiadi, I., Setyanta, B., and Widijono, B, S., 2010. Delineasi Cekungan Sedimen Sumatera Selatan Berdasarkan Analisis Data Gayaberat. Jurnal Geo-Sciences, 20 (2): 93-106.

Setiadi, I., and Marjiyono. 2018. Interpretasi Geologi Bawah Permukaan dan Delineasi Cekungan Salawati wilayah Sorong dan Sekitarnya Berdasarkan Analsis Spektral serta Pemodelan 2D dan 3D Data Gayaberat. Jurnal Geologi dan Sumber Daya Mineral, 19 (3): 117-130.

Setiadi, I., Setyanta, B., Nainggolan, T. B., and Widodo, J., 2019. Delineation of Sedimentary Subbasin and Subsurface Interpretation East Java Basin in the Madura Strait and Surrounding Area Based on Gravity Data Analysis. Bulletin of the Marine Geology, 34 (1): 1-16.

Sribudiyani, Muchsin, N., Ryacudu, R., Kunto, T., Astono, P., Prasetya, I., Sapiie, B., Asikin, S., Harsolumakso, A. H., and Yulianto, I., 2003. The collision of the East Java microplate and its implication for hydrocarbon occurrences in the East Java basin. Proceedings Indonesian Petroleum Association, 29th Annual Convention & Exhibition.

Talwani, M. Worzel, J.L., and Ladisman, M. 1959. Rapid Gravity Computation for Two Dimensional

Bodies with Application to the Medicino Submarine Fractures Zone. Journal of Geophysics Research, 64 (1): 49 - 59.

Telford, W.M., Geldart, L.P., and Sheriff, R.E., 1990. Applied Geophysics. USA: Cambridge

University.

Walidah, F. I. 2011. Penentuan Struktur Bawah Permukaan Berdasarkan Analisa dan Pemodelan Data Gayaberat untuk Melihat Potensi Hidrokarbon pada Daerah “FW1807” Cekungan Jawa Timur Utara. Bachelor thesis. Universitas Indonesia. Depok.




DOI: http://dx.doi.org/10.32693/bomg.38.2.2023.828

Accredited by Ministry of Research, Technology, and Higher Education, Republic Indonesia 

Abstracted/Indexed by: