Basement Configuration and Delineation of Banyumas Sub-Basin Based On Gravity Data Analysis


  • Imam Setiadi



Many oil and gas seepages occurred on the

surface of Banyumas Basin as one of the active petroleum systems manifestation. Geological complexity of this basin makes it difficult to discover the oil and gas reserves unlike the basin of the East and West Java area. The aims of this research are to determine the subsurface geological structure patterns, distribution of sedimentary sub-basin, and  basement configuration. Gravity data of Banyumas and surrounded area is analysed by using spectral analysis, moving average filter, and 2D forward modelling. The gravity data delineation analysis resulting about six sedimentary sub basins with depocentre of 5.5 km positioned at Purbalingga and Karangkobar Sub-basin. The structural pattern derived from residual gravity anomaly shows a relative southeast-northwest strike-slip fault and an east-west trend basement high pattern. Concerning from the oil and gas seepage presence in the study area, sufficient sedimentary rock thickness, and supporting petroleum system, this region is considered as an attractive subbasin for further petroleum prospect investigation.


Keywords : gravity analysis, sedimentary basin, spectral analysis, moving average, 2D modelling


Download data is not yet available.


Armandita, C., dkk., 2009, Intra-Arc Trans-Tension Duplex of Majalengka to Banyumas Area : Prolific Petroleum Seeps and Opportunities in West-Central Java Border, Proceeding Indonesian Petroleum Association, Thirty-Third Annual Convention and Exhibition.

Bemmelen, R.W. van, 1949, The Geology of Indonesia, Vol. IA,General Geology of Indonesia and adjacent archipelagos,Martinus Nijhoff, The Hague

Blakely, R. J., 1996, Potential Theory in Gravity and Magnetic Applications, Cambridge University Press, Cambridge.

Dibyantoro, H., dan Sutisna, S., 1977, Peta Anomali Bouguer Lembar Kebumen, Jawa, Skala 1 : 100.000, Direktorat Geologi, Bandung.

Grandis, H. 2009. Pengantar Pemodelan Inversi Geofisika. Himpunan Ahli Geofisika Indonesia : Jakarta.

Ndougsa-Mbarga, T., Yufenyiu Layu, D., Tabod, C. T., & Quentin Yene-Atangana, J. (2014). Delineation of the northern limit of the Congo Craton based on spectral analysis and 2.5D modeling of aeromagnetic data in the Akonolinga-Mbama area, Cameroon. Geofísica Internacional, 53(1), 5–16.

Siagian H.P., N.Sjarif, I.Sobari, 1995, Peta Anomali Lembar Banyumas, Jawa, Skala 1 : 100.000, Pusat Penelitian dan Pengembangan Geologi, Bandung.

Purwasatriya, E.B., dan Waluyo G., 2010, Studi Stratigrafi pada rembesan minyak serta hubungannya dengan petroleum system di cekungan Banyumas, Proceeding PIT IAGI Lombok, the 39th IAGI Annual Convention and Exhibition.

Sari, I.P. 2012. Study Komparasi Metode Filtering Untuk Pemisahan Regonal dan Residual Dari Data Anomali Bouger . (Skripsi) Prodi Fisika FPMIPA Universitas Indonesia, Depok.

Santoso, B., dkk., 2007, Neogene Tectonic and Sedimentary Control to Hydrocarbon generation in Banyumas Sub-Basin, South of Central Java, Proceeding Indonesian Petroleum Association, Thirty-First Annual Convention and Exhibition.

Satyana, 2007, Central Jawa, Indonesia - A “Terra Incognita†in Petroleum Exploration: New Considerations on Tectonic Evolution and Petroleum Implications, Proceeding Indonesian Petroleum Association, Thirty-First Annual Convention and Exhibition.

Suharyono S., T. Ermawan, R.Otong dan Marlan, 1995, Peta Anomali Bouguer Lembar Purwokerto dan Tegal, Jawa Skala 1 : 100.000, Pusat Penelitian dan Pengembangan Geologi, Bandung.

Talwani, M., Worzel, J.L. and Landisman, M. 1969. Rapid Gravity Computations for Two-Dimensional Bodies with Aplication to the Mendocino Submaarine Fracture Zone. Journal of Geophysical Reasearch: Vol.64 No.1

Telford, W.M., Goldrat, L.P., dan Sheriff, R.P. 1990. Applied Geophysics 2nd ed. Cambridge University Pres, Cambridge.

Zahra, H. S., & Oweis, H. T. (2016). Application of high-pass filtering techniques on gravity and magnetic data of the eastern Qattara Depression area, Western Desert, Egypt. NRIAG Journal of Astronomy and Geophysics, 5(1), 106–123.