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"Seismic hazard map in Indonesian bedrock was part of the Indonesian standard describeng seismic hazard for Indonesia territory and used as one of significant load in structure design. Recent earthquake with big intensity surely can effect the seismic hazard in Indonesia. Therefore, seismic hazard map in Sumatera, Java-Sumba and Kalimantan was developed as part of seismic hazard analysis in Indonesia using the latest data, 3D seismic source model and PSHA-07-USGS software and publicized in this paper. The seismic hazard analysis was refer to Unified Building Code 97 and represent the 475 year return period seismic hazard map in Sumatera, Java-Sumba and Kalimantan. The result showed that maximum PGA for Sumatera ranges between 0.02-0.65 g, Java- Sumba 0.02-0.65 g and Kalimantan 0.005 - 0.2 g. All result showed a larger value than seismic hazard map in the than Indonesian Standar (SNI 03-1726-2002). Comparison with the other studies showed a comparative result only in Sumatera, while in Java-Sumba and Kalimantan shown a disagree result. Some factors can affect the result, such as seismic data, seismic source model and attenuation function selection."

"ABSTRAKPenggunaan survei seismik 3 dimensi telah menjadi metode unggulan dalam eksplorasi hidrokarbon. Geometri yang umum digunakan sebagai desain survei seismik 3D adalah penggunaan geometri Orthogonal di mana receiver line dan source line membentuk sudut 90o. Dalam penelitian ini geometri Orthogonal dikomparasikan menggunakan 3 geometri lain, yaitu Brick, Slanted dan Zig-Zag. Sedangkan model geologi yang digunakan adalah model sintetik dengan 3 lapisan horizon dan 1 patahan sebesar 500. Komparasi dihitung dalam 4 parameter yang berbeda, yaitu layout pengukuran, Bin Fold, ray tracing parameter dan pembuatan seismic section secara sintetik. Layout pengukuran menjelaskan secara umum parameter permukaan yang ada. Bin Fold menjelaskan parameter fold yang dihasilkan dari geometri. Semakin banyak Fold membuat CMP yang dapat di stack menjadi lebih banyak dan memberikan data yang lebih baik. Ray tracing atribut menjelaskan atribut dari jejak gelombang seismik yang terpantulkan pada bidang reflektor. Synthetic seismic section memberikan data seismik yang dapat diamati. Penelitian ini sebagian besar berurusan mengenai variasi aspek dari geometri survei desain dan dampaknya pada parameter permukaan dan juga Illumination Study dari ray tracing attribute serta sintetik seismic section.

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ABSTRAKThe use of Seismic 3D method has been the most useful way in hydrocarbon exploration. In the acquisition, the most common geometry is the Orthogonal geometry where the receiver line and source line form a 90o angle. In this research, Orthogonal geometry is being compared to other 3 geometries, which are Brick, Slanted and Zig Zag. The geological model which is used in this research is using a synthetic geological model. The model is contained of 3 major layers and a normal fault structure with a 50o angle. The comparation is valued with 4 parameters, which are the acquisition layout, Bin Fold, ray tracing attribute and synthetic seismic section. The layout is defining about the surface parameter which deals about source and Receiver parameter. Bin Fold is about the Fold which is generated by the variety of the geometry. The higher Fold gives more stacked CMP and it will give more a good data. Ray tracing explain about the raytrace of the seismic wave which reflected from the reflector. Synthetic Seismic Section generate the seismic data which can be observed. This study deals with the various aspects of the geometry survey design and its impact to the surface parameter and the illumination study in ray tracing attribute to generate synthetic seismic section."

"Penelitian pada Cekungan Sumatera Utara telah dilakukan dengan tujuan untuk mengevaluasi efektivitas metode Pseudo 3D Seismik menggunakan algoritma Simulasi Gaussian Sekuensial (SGS) dalam mendelineasi geometri zona karbonat Formasi Tampur. Hal ini dikarenakan keterbatasan kemampuan data 2D dalam mendeleniasikan batasanbatasan fasies yang menyusun carbonate buildup. Peneliti menggunakan 38 lintasan seismik 2D PSTM yang tersebar pada area studi ini. Peneliti membangun volume pseudo 3D melalui proses gridding, injeksi amplitudo, dan interpolasi berbasis model peta struktur pada domain waktu. Peneliti menganalisis volume pseudo 3D menggunakan atribut seismik RMS Amplitude dan edge detection untuk mengidentifikasi batas fasies karbonat. Hasil interpretasi menunjukkan bahwa metode SGS mampu memetakan reef core dan reef margin yang menyusun dari carbonate buildup. Peneliti juga mengidentifikasi komponen sistem petroleum (batuan induk, reservoir, dan penutup) berdasarkan hasil interpretasi spasial dari volume pseudo 3D. Hasil penelitian membuktikan bahwa metode SGS efektif untuk membangun model spasial bawah permukaan pada wilayah studi di lepas pantai Cekungan Sumatera Utara.

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Research in the North Sumatra Basin was carried out with the aim of evaluating the effectiveness of the Pseudo 3D Seismic method using the Sequential Gaussian Simulation (SGS) algorithm in delineating the geometry of the carbonate zone of the Tampur Formation, this is due to the limited ability of 2D data in delineating the facies boundaries that make up the carbonate buildup. Researchers used 38 2D PSTM seismic trajectories spread across this study area. Researchers built pseudo 3D volumes through a process of gridding, amplitude injection, and model-based interpolation of structure maps in the time domain. Researchers analyzed the 3D pseudo volume using the RMS Amplitude and edge detection seismic attributes to identify carbonate facies boundaries. The interpretation results show that the SGS method is able to map the reef core and reef margin that make up the carbonate buildup. Researchers also identified the components of the petroleum system (source rock, reservoir and cover) based on the results of spatial interpretation of the 3D pseudo volume. The research results prove that the SGS method is effective for building subsurface spatial models in the study area off the coast of the North Sumatra Basin."

"Penelitian pada Cekungan Sumatera Utara telah dilakukan dengan tujuan untuk mengevaluasi efektivitas metode Pseudo 3D Seismik menggunakan algoritma Simulasi Gaussian Sekuensial (SGS) dalam mendelineasi geometri zona karbonat Formasi Tampur. Hal ini dikarenakan keterbatasan kemampuan data 2D dalam mendeleniasikan batasanbatasan fasies yang menyusun carbonate buildup. Peneliti menggunakan 38 lintasan seismik 2D PSTM yang tersebar pada area studi ini. Peneliti membangun volume pseudo 3D melalui proses gridding, injeksi amplitudo, dan interpolasi berbasis model peta struktur pada domain waktu. Peneliti menganalisis volume pseudo 3D menggunakan atribut seismik RMS Amplitude dan edge detection untuk mengidentifikasi batas fasies karbonat. Hasil interpretasi menunjukkan bahwa metode SGS mampu memetakan reef core dan reef margin yang menyusun dari carbonate buildup. Peneliti juga mengidentifikasi komponen sistem petroleum (batuan induk, reservoir, dan penutup) berdasarkan hasil interpretasi spasial dari volume pseudo 3D. Hasil penelitian membuktikan bahwa metode SGS efektif untuk membangun model spasial bawah permukaan pada wilayah studi di lepas pantai Cekungan Sumatera Utara.

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Research in the North Sumatra Basin was carried out with the aim of evaluating the effectiveness of the Pseudo 3D Seismic method using the Sequential Gaussian Simulation (SGS) algorithm in delineating the geometry of the carbonate zone of the Tampur Formation, this is due to the limited ability of 2D data in delineating the facies boundaries that make up the carbonate buildup. Researchers used 38 2D PSTM seismic trajectories spread across this study area. Researchers built pseudo 3D volumes through a process of gridding, amplitude injection, and model-based interpolation of structure maps in the time domain. Researchers analyzed the 3D pseudo volume using the RMS Amplitude and edge detection seismic attributes to identify carbonate facies boundaries. The interpretation results show that the SGS method is able to map the reef core and reef margin that make up the carbonate buildup. Researchers also identified the components of the petroleum system (source rock, reservoir and cover) based on the results of spatial interpretation of the 3D pseudo volume. The research results prove that the SGS method is effective for building subsurface spatial models in the study area off the coast of the North Sumatra Basin."