IDENTIFIKASI BATAS SUB-CEKUNGAN HIDROKARBON MENGGUNAKAN ANALISIS SHD (SECOND HORIZONTAL DERIVATIVE) DAN SVD (SECOND VERTICAL DERIVATIVE) BERDASARKAN KORELASI DATA GAYABERAT DAN SEISMIK
DOI:
https://doi.org/10.23960/jge.v5i1.23Keywords:
sub-basin, SVD, SHD, gravity, seismicAbstract
Gravity method generally can read the difference of rock density to identify subsurface structures. This research was conducted in Riau area with the aim of knowing fault and subsurface structure, and determining sub-basin boundary. Data processing was done by using spectral analysis, SHD and SVD analysis, and 2D modeling then later correlated with seismic section to find out the subsurface structure of research area. The results showed that the bouguer anomaly value had a range of values between 5.6 mGal to 33.2 mGal with a surface density of 1.95 g / cc. High anomaly were in the eastern region and low anomaly were in the NW - SE trending region. 6 low anomalies indicated as a sub-basin pattern were separated by a relatively high altitude area of North West Southeast. The average residual anomaly depth was about 2.3 km. Based on the 2D subsurface modeling results, there was layer structure from the youngest to eldest that were alluvial deposits, Petani Formation, Sihapas group and granitic rock as the base rock. The projected subsurface section to surface showed 5 sub-basins with basin width 4-12 km located in the sub-basin and fault indication area.
References
Blakley, RJ., 1996. Potential Theory in Gayaberat and Magnetic Applications, Cambridge University Press, Cambridge.
Cordell, L., and Grauch, V. J. S., 1985. Mapping Basement Magnetization Zones From Aeromagnetic Data in The San Juan Basin, New Mexico, in Hinze, W. J., Ed., The Utility of Regional Gayaberat and Magnetic Anomaly Maps: Sot. Explor. Geophys., 181 and 197.
Elkins, T.A., 1951. The Second Derivative Methode of Gravity Interpretation Geophysics. Bab XVI. Hal 29-50 dan V.23, 97-127.
Kadir, W.G.A., 2000. Diktat Kuliah: Eksplorasi Gayaberat dan Magnetik. Jurusan Teknik Geofisika Fakultas Ilmu Kebumian dan Teknologi ineral, ITB. Bandung.
Lawton, D.C., dan Isaac, J.H., 2007. Integrated Gravity and Seismic Interpetation in the Norman Range, Northwest Territories, Canada. Jurnal of Geophysics. Vol. 72, No. 5. P, B107-B112.
Nurdiyanto, B., Hartanto, E., Ngadmanto, D., Sunardi, B., dan Susilanto, P., 2011. penentuan tingkat kekerasan batuan menggunakan metode seismik refraksi, jurnal meteorologi dan geofisika Vol, 12 No 3, 211 – 220.
Octonovrilya, Litanya. P, Putdja. I. P., 2009. Analisa Perbandingan Anomaly Gravitasi dengan persebaran intrusi air asin (Studi kasus Jakarta 2006-2007). Jurnal Meteorologi dan Geofisika Vol.10 No.1 : AMG.
Reynolds, J.M.,1997. An Introduction to Applied and Environmental Geophysics, Chichester. John Wiley dan sons.
Sarkowi, M., 2008. Karakteristik Gradien Gayaberat Untuk Interpretasi Anomali Gayaberat Mikro Antar Waktu. Seminar Hasil Penelitian dan Pengabdian kepada Masyarakat. Unila.
Susilawati. 2005. Pemodelan metode Gayaberat. Departement Fisika FMIPA UI.
Supriyanto. 2007. Analisis Data Geofisika: Memahami teori Inversi. Department Fisika FMIPA UI: Depok.
Downloads
Published
How to Cite
Issue
Section
Citation Check
License
Authors/Readers/Third Parties can read, print and download, redistribute or republish the article (e.g. display in a repository), translate the article, download for text and data mining purposes, reuse portions or extracts from the article in other works, sell or re-use for commercial purposes, remix, transform, or build upon the material, they must distribute their contributions under the same license as the original Creative Commons Attribution-NonComercial (CC BY-NC).
