Analisa Anomali Bawah Permukaan Laut Menggunakan Data Side Scan Sonar, Sub Bottom Profiler dan 2D High Resolution Seismic

Farabi A., Ahmad Farhan (2018) Analisa Anomali Bawah Permukaan Laut Menggunakan Data Side Scan Sonar, Sub Bottom Profiler dan 2D High Resolution Seismic. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian identifikasi geohazard telah dilakukan berdasarkan data pengukuran Side Scan Sonar, Sub-bottom Profiler dan 2D High Resolution Seismic. Identifikasi geohazard bertujuan untuk mengetahui objek dasar laut dan distribusi anomali pada area survei untuk menghindari adanya kecelakan prospek minyak dan gas. Luas area survei 2 x 4 km2 berada pada perairan lepas pantai Pulau Madura dengan dua target prospek pembangunan rig minyak GTX-2 dan Alternative GTX-2. Pengambilan data semua metode dilakukan di 50 line membentuk crossline. Data dari Side scan sonar kemudian dianalisa sehingga menghasilkan peta Seabed feature, Data dari Sub-bottom profiler digunakan untuk analisa kontur kedalaman dan anomali dangkal dan data 2D High Resolution Seismic digunakan untuk menganalisa anomali menengah. Adapun hasil yang didapatkan bahwa objek dasar laut yang terdapat di daerah survei berupa pockmark, kabel, pipa dan Scars Trawl. Kontur kedalaman reflektor pertama mempunyai interval 6 – 11m dibawah permukaan laut. Letak dari anomali level 1 – 3 adalah pada kedalaman 15 – 19 mBSB, 130 – 133 mBSL dan 137 – 142 mBSL. Adapun jarak terdekat anomali terhadap target lokasi GTX-2 berturut-turut adalah 300, 200 dan 775 m dan terhadap alternative GTX-2 adalah 620, 860 dan pada lokasi dikedalaman 175ms TWT. Pada penelitian ini anomali yang terkandung sebagian besar adalah gas dengan adanya kemungkinan yang tinggi pada level 1. Menurut peta distribusi anomali lokasi GTX-2 dan alternative GTX-2 masih dalam kondisi aman untuk eksplorasi dan eksploitasi minyak dan gas. =========================================================================================== Geohazard identification studies have been conducted based on measurements of Side Scan Sonar, Sub-bottom Profiler and 2D High Resolution Seismic. Geohazard identification aims to determine the seabed object and anomaly distribution in the survey area to avoid any accidents of oil and gas prospects. The 2 x 4 km2 survey area located in the off the coast of Madura Island with two prospects for development of GTX-2 and Alternative GTX-2 oil rigs. Data retrieval of all methods is done in 50 lines forming a crossline. The data from Side scan sonar is then analyzed to produce Seabed feature maps, Data from Sub-bottom profiler is used for depth contour analysis and shallow anomalies and 2D High Resolution Seismic data is used to analyze Intermediate anomaly. The results obtained that the seabed objects contained in the survey area in the form of pockmarks, cables, pipeline and Scars Trawl. The first reflektor depth contour has an interval 6 - 11m below sea level. The location of anomaly level 1 - 3 is at a depth of 15 - 19 mBSB, 130 - 133 mBSL and 137 - 142 mBSL. The closest anomaly distance to the GTX-2 location target is 300, 200 and 775 m respectively and the alternative GTX-2 is 620, 860 and at the depth of 175ms TWT. In this study, anomalies are mostly gas with a high probability at level 1. According to the anomaly distribution map the GTX-2 and Alternatives GTX-2 are still in safe condition for oil and gas exploration and exploitation

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Geohazard, Side scan sonar, Sub-bottom profiler, 2D high resolution seismic, Anomali, Seabed feature
Subjects: G Geography. Anthropology. Recreation > G Geography (General)
G Geography. Anthropology. Recreation > G Geography (General) > G109.5 Global Positioning System
G Geography. Anthropology. Recreation > G Geography (General) > G70.212 ArcGIS. Geographic information systems.
G Geography. Anthropology. Recreation > GA Mathematical geography. Cartography
G Geography. Anthropology. Recreation > GB Physical geography
G Geography. Anthropology. Recreation > GC Oceanography
Q Science > QE Geology
Q Science > QE Geology > QE571 Sedimentation and deposition. Sediment transport.
Q Science > QE Geology > QE601 Geology, Structural
Divisions: Faculty of Mathematics and Science > Physics > (S1) Undergraduate Theses
Depositing User: Farabi Ahmad Farhan
Date Deposited: 20 Feb 2018 08:56
Last Modified: 20 Feb 2018 08:56
URI: http://repository.its.ac.id/id/eprint/50436

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