Analisis Mekanisme Fokus Menggunakan Metode Inversi Momen Tensor Pada Lapangan Panas Bumi 'X'

Amalina, Salma (2022) Analisis Mekanisme Fokus Menggunakan Metode Inversi Momen Tensor Pada Lapangan Panas Bumi 'X'. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pemahaman terhadap karakterisik patahan diperlukan karena terkait dengan parameter permeabilitas reservoir. Dengan memanfaatkan data microearthquake, telah dilakukan pengolahan inversi momen tensor menggunakan ISOLA untuk mengetahui karakteristik patahan. Mekanisme fokus menggambarkan arah dan jenis patahan berdasarkan parameter patahan yang diperoleh. Data waveform tiga komponen telah dipersiapkan dan dikoreksi untuk menjadi sinyal observasi yang digunakan dalam tahap inversi. Informasi lokasi stasiun dan parameter terkait hiposenter telah ditentukan dalam langkah pengolahan. Pole zero data digunakan dalam koreksi instrumen supaya sinyal yang diterima merupakan sinyal sebenarnya.
Perhitungan fungsi Green digunakan untuk membuat sinyal sintetik berdasarkan crustal model dari kecepatan 1D yang dijadikan masukan. Inversi momen tensor telah dilakukan dengan membandingkan displacement antara data sinyal observasi dan sinyal sintentik. Hasil inversi menunjukkan fitting kurva dengan nilai varians reduksi yang tinggi, yaitu 0.52 hingga 0.91.
Dari hasil inversi momen tensor dan plotting beachball diperoleh dominan patahan strike-slip berarah NW-SE dengan dip 570 – 890 dan arah pergeseran ke kanan.
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Understanding of the fracture characteristics is required because it is related to reservoir permeability parameters. By utilizing microearthquake data, moment tensor inversion processing has been carried out using ISOLA to determine the characteristics of the fault. The focal mechanism describes the direction and type of fault based on the obtained fault
parameters. The three-component waveform data have been prepared and corrected to become the observation signal used in the inversion stage. Station location and hypocentre information have been determined in the processing step. Pole zero data is used in instrument correction so that the received signal is the actual signal. The calculation of the Green function is used to create a synthetic signal based on a crustal model of 1D velocity which is used asinput. Moment
tensor inversion has been carried out by comparing the displacement between the observed signal and synthetic signal. The inversion results show displacement curve with high variance reduction value, 0.52 to 0.91. From the results of moment tensor inversion and beachball plotting, describe dominant fault is strike-slip in NW-SE orientation with dip 570 – 890 and right slip direction.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Mekanisme fokus, Momen tensor, Patahan
Subjects:	G Geography. Anthropology. Recreation > GB Physical geography > GB1199.5 Geothermal resources
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geomatics Engineering > 29202-(S1) Undergraduate Thesis
Depositing User:	- Davi Wah
Date Deposited:	20 Nov 2023 03:24
Last Modified:	20 Nov 2023 03:24
URI:	http://repository.its.ac.id/id/eprint/105127

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