Pemodelan 3D Reservoar Geothermal Berdasarkan Data Anomali Magnetik Reduction To The Pole Daerah Ulubelu Kabupaten Tanggamus.

Alfhareza Sandy, 0855051003 (2015) Pemodelan 3D Reservoar Geothermal Berdasarkan Data Anomali Magnetik Reduction To The Pole Daerah Ulubelu Kabupaten Tanggamus. Fakultas Teknik, Universitas Lampung.

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2. ABSTRACT.pdf

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Abstrak (Berisi Bastraknya saja, Judul dan Nama Tidak Boleh di Masukan)

Telah dilakukan Pemodelan 3D Anomali Magnetik Total hasil transformasi reduksi ke kutub utara medan magnetik bumi untuk menentukan posisi reservoar geothermal daerah Ulubelu kabupaten Tanggamus. Prinsip dasar metode magnetik adalah melakukan pengukuran medan magnet total diatas permukaan bumi sebagai respon kemagnetan (suseptibilitas) batuan yang ada dibawah permukaan. Penerapan koreksi variasi harian (diurnal correction), koreksi IGRF (International Geomagnetic Reference Field) pada data pengukuran lapangan menghasilkan data anomali medan magnet total yang merupakan respon anomali batuan reservoar geothermal dan batuan sekitarnya. Transformasi reduksi ke kutub utara magnetik bumi diterapkan pada data anomali medan magnet total dilakukan untuk merekonstruksi data anomali medan magnet dipole menjadi monopole. Pemodelan inversi 3D anomali magnetik reduction to the pole memberikan informasi kedalam rata-rata reservoar sebesar 2500m diatas MSL. Analisis sinyal dengan menerapkan Fast Fourier Transform (FFT) menghasilkan energi spektrum sebagai respon anomali batuan bawah permukaan dan menghasilkan kedalaman rata-rata reservoar sebesar 700m dari MSL. Kata kunci : Ulubelu, Anomali Magnetik, Reducion to the Pole, Suseptibilitas, Analisa Spektrum. 3D Modelling of Total Anomaly Magnetic Data is results from reduction to the pole transformation to decide the geothermal reservoir position in Ulubelu area, Tanggamus. Basically, magnetic method is measuring total of magnetic fields on the surface as a magnetic respons (susceptibility) from rocks in the subsurface. Applying the diurnal correction, IGRF (International Geomagnetic Reference Field) correction, to measured field’s data generate total anomaly magnetic’s field data which is anomaly respond from geothermal reservoir rocks and the surrounding rocks. Reduction to the North Pole of Earth magnetics transformation applied to total anomaly magnetic data to reconstruction the anomaly magnetic’s field data from dipole to monopole. 3D inversion modelling of reduction to the pole magnetics anomaly gave the depth information in average is 2500m above mean sea level. Signal analysis with appliying FFT (Fast Fourier Transform) generates spectrum energy as a subsurface rock anomaly responds and generates average of reservoir depth in 700m above mean sea level. Keywords: Ulubelu, Magnetic Anomaly, Reducion to the Pole, Susceptibility, Spectrum Analysis.

Jenis Karya Akhir: Skripsi
Subyek:
> Teknologi (General)
> Teknologi (General)
Teknologi (General)
Program Studi: Fakultas Teknik > Prodi S1-Teknik Geofisika
Pengguna Deposit: 6508578 . Digilib
Date Deposited: 04 May 2015 06:22
Terakhir diubah: 04 May 2015 06:22
URI: http://digilib.unila.ac.id/id/eprint/9689

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