Desain Parameter Akuisisi Seismik 3d Untuk Eksplorasi Hidrokarbon Di Lingkungan Vulkanik Dengan Dengan Analisa Metode Dinamik Dan Statik Pada Cekungan Jawa Barat Bagian Utara

Banuboro, Adib (2017) Desain Parameter Akuisisi Seismik 3d Untuk Eksplorasi Hidrokarbon Di Lingkungan Vulkanik Dengan Dengan Analisa Metode Dinamik Dan Statik Pada Cekungan Jawa Barat Bagian Utara. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Manifestasi oil seeps di lingkungan vulkanik dapat menunjukkan keberadaan minyak bumi. Salah satunya, terletak di Kabupaten Majalengka, Cekungan Jawa Barat bagian Utara. Hal ini menjadi tantangan bagi keilmuan geofisika dalam mencitrakan kondisi bawah permukaan di lingkungan vulkanik untuk melihat keberadaan dan persebaran hidrokarbon. Metode seismik memiliki keterbatasan pada litologi vulkanik. Evaluasi desain akuisisi seismik 3D diperlukan untuk permasalahan geometri struktur dan kontras kecepatan litologi vulkanik. Evaluasi dilakukan dengan pendekatan desain akuisisi seismik 2D yang nantinya diterapkan pada desain akuisisi seismik 3D untuk dianalisa secara statik. Variasi parameter meliputi common depth point (CDP), fold coverage, dan far Offset . Model geologi sintetik dibuat berdasarkan data sumur eksplorasi dan data seismik terdahulu. Target lapisan pada akuisisi adalah lapisan Formasi Jatibarang bagian atas di kedalaman 1763 meter. Pada analisa desain 2D lapisan Jatibarang bagian atas ditunjukkan pada domain waktu 1000 ms, diproleh hasil yakni CDP inteval 10 meter, Fold coverage 45, dan Far Offset 1790 meter. Hasil yang tunjukkan dari desain akuisisi 2D pada penampang seismik di terapkan pada desain akuisisi seismik 3D statik. Diperoleh parameter akuisisi seismik 3D antara lain Fold coverage 49, Far Offset 1965 meter, Near Maximum Offset 282.8 meter, Jumlah salvo 10 buah, Jumlah Receiver Line Interval 14 buah, Jarak Shot Line Interval 200 meter, Jarak Receiver Line Interval 200 meter, Jumlah Geophone/lintasan 140 buah. Berdasarkan hasil analisa, desain parameter akuisisi yang menjadi perhatian khusus pada lingkungan vulkanik ini adalah Common Depth Point Interval, Fold coverage, dan Far Offset karena dapat memberikan citra penampang seismik di lingkungan vulkanik dengan S/N ratio yang tinggi. ========================================================================= Volcanic environme nt has a hydrocarbon potency to explore. There is a manifestation that shown by oil seeps in the surface. Majalengka is one of the area indicated as an hydrocarbon zone below it that located in a part of North West Java Basin. It is challenging and has opp ortunity to develop an exploration methods. Because there is a problem with seismic wave propagation on the volcanic area. Research of seismic design is needed for analysis seismic design that could image the structural geometry of volcanic environment. Th e author use majalengka as an field study of seismic design parameter analysis in volcanic environment. The author use a geological syntetic model to perform this research built by old 2D seismic section and well data on the research area. Methodology tha t used in this research by analysis crossover 2D seismic acquisition line which made as 3D seismic configuration which consist of inline and xline by dynamic analysis. Author use three variation s of seismic acquisition parameter in 2D ana lysis , they are CDP interval, Fold coverage , and Far Offset. 2D analysis use seismic section from each variation of seismic design parameter. The result from 2D seismic design analysis that can give the best answer for structural geometry problem based on volcanic enviro nment are CDP interval 10 meter , 45 Fold coverage , and Far Offset 1790 meter. This result used for 3D seismic static analysis and applied as a input parameter for build 3D seismic design. 3D Seismic parameter design that used after stati c analysis are 49 Fold coverage , Far Offset 1965 meter , Near Maximum Offset 282.8 meter , number of salvo 10 , number of RLI (Reciver Line Interval) 14 , Shot L ine Interval 200 meter , Receiver Line I nterval 200 meter , number of Geophone/line 140. Therefore , 2D dynamic ana lysis result that important for volcanic case are CDP interval, Fold coverage, and Far offset give the best answer from the seismic section could give 3D static design for seismic acquisition design plan in volcanic area with high S/N ratio.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: CDP Interval, Fold coverage, Far Offset, Desain Akuisisi Seismik 3D, Desain Akuisisi Seismik 2D, Lingkungan Geologi Vulkanik, 3D Seismic Design, 2D Seismic Design, Geological Volcanic Environment
Subjects: Q Science > QE Geology > QE601 Geology, Structural
T Technology > T Technology (General)
Divisions: Faculty of Civil Engineering and Planning > Geophysics Engineering > (S1) Undergraduate Theses
Depositing User: ADIB BANUBORO BANUBORO
Date Deposited: 16 Aug 2017 01:25
Last Modified: 16 Aug 2017 01:25
URI: http://repository.its.ac.id/id/eprint/42206

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