Ditemukan 2 dokumen yang sesuai dengan query
Mustika Delimantoro
Abstrak :
[ABSTRAK
PT. Sabang Geothermal Energi (PT. SGE) akan melakukan pemboran 2 sumur panas
bumi pada WKP Jaboi untuk pembangkitan energi listrik 2 x 5 MW sehingga
diperlukan penentuan lokasi sumur dan target pemboran yang diperkirakan dapat
menghasilkan output uap yang maksimal. Dengan metode CSAMT yang ditunjang
metode Gaya Berat akan dilakukan penelitian untuk mencari lokasi zona-zona produksi
pada WKP Jaboi. Pemodelan terhadap data resistivitas batuan dari pengukuran dengan
metode CSAMT yang dikombinasikan dengan pemodelan Gaya Berat, geologi dan
hidrologi akan memberikan gambaran zona-zona produksi tersebut. Pemodelan
dilakukan dengan model 2D menggunakan software WinGlinkTM. Penentuan lokasi dan
target pemboran yang tepat dapat mengurangi investasi yang diperlukan oleh PT. SGE
secara signifikan sehingga memberikan tingkat pengembalian investasi yang lebih baik
untuk proyek panas bumi pada WKP Jaboi.
ABSTRACT
PT Sabang Geothermal Energi (PT SGE) is planning to drill 2 geothermal wells in Jaboi
Geothermal Working Area for 2 x 5 MW generation electricity, so it is required to
determination of the well location and drilling targets which is expected to produce
maximum steam output. CSAMT method that is supported by gravity method will be
conducted to located the production zones in Jaboi Geothermal Working Area.
Modeling of rock resistivity data from CSAMT method measurements which is
combined with gravity modeling, geology, and hydrology will provide an overview of
the production zones. Modeling was performed with a 2D model using WinGlinkTM
software. Precise determination of location and drilling targets will reduce the necessary
investment by PT SGE significantly, so as to provide the return on investment that is
better for the geothermal project in Jaboi Geothermal Working Area.;PT Sabang Geothermal Energi (PT SGE) is planning to drill 2 geothermal wells in Jaboi
Geothermal Working Area for 2 x 5 MW generation electricity, so it is required to
determination of the well location and drilling targets which is expected to produce
maximum steam output. CSAMT method that is supported by gravity method will be
conducted to located the production zones in Jaboi Geothermal Working Area.
Modeling of rock resistivity data from CSAMT method measurements which is
combined with gravity modeling, geology, and hydrology will provide an overview of
the production zones. Modeling was performed with a 2D model using WinGlinkTM
software. Precise determination of location and drilling targets will reduce the necessary
investment by PT SGE significantly, so as to provide the return on investment that is
better for the geothermal project in Jaboi Geothermal Working Area., PT Sabang Geothermal Energi (PT SGE) is planning to drill 2 geothermal wells in Jaboi
Geothermal Working Area for 2 x 5 MW generation electricity, so it is required to
determination of the well location and drilling targets which is expected to produce
maximum steam output. CSAMT method that is supported by gravity method will be
conducted to located the production zones in Jaboi Geothermal Working Area.
Modeling of rock resistivity data from CSAMT method measurements which is
combined with gravity modeling, geology, and hydrology will provide an overview of
the production zones. Modeling was performed with a 2D model using WinGlinkTM
software. Precise determination of location and drilling targets will reduce the necessary
investment by PT SGE significantly, so as to provide the return on investment that is
better for the geothermal project in Jaboi Geothermal Working Area.]
2015
T45309
UI - Tesis Membership Universitas Indonesia Library
Aditya Wira Perdana
Abstrak :
Metode Controlled Source Audio Frequency Magnetotelluric (CSAMT) memanfaatkan sumber buatan guna mendapatkan sinyal yang stabil dengan cara menginjeksikan arus dari transmitter dan diterima oleh receiver. Menggunakan frekuensi yang telah diatur yaitu frekuensi 6400 Hz - 2 Hz dengan target kedalaman > 1 km dan lama waktu pengukuran 30 menit pada setiap titik pengukuran. Hasil pengukuran yang didapat berupa medan magnet dan medan listrik yang ditangkap oleh receiver kemudian dengan persamaan Cagniard diperoleh nilai resistivitas semu. Pengukuran dilakukan di daerah ?A? dengan sistem hidrotermal tipe epitermal. Dari data lapangan dilakukan proses editing dan smoothing menggunakan software CMTpro kemudian dilakukan inversi menggunakan Bostik Inversion pada software MTSoft2D
Penggunaan metode CSAMT ini didukung dengan metode geofisika lain seperti IP, resistivity, dan magnetik. Metode CSAMT dapat memberikan gambaran bawah permukaan dengan penetrasi yang lebih dalam zona penyebaran emas serta didukung metode IP, resistivity dan magnetik untuk mendapatkan korelasi pada kedalaman yang lebih dangkal. Hasil pengolahan ditampilkan secara 2D dengan software surfer 9 dan 3D dengan software Geoslicer-X. Terdapat korelasi hasil CSAMT dengan respon resistivitas > 350 Ohm.m pada kedalaman 400 meter serta diperkuat dari data pendukung metode resistivity dengan resistivitas > 350 Ohm.m dengan respon profil magnetik yang berundulasi, dan nilai PFE tinggi > 4%, yang merupakan zona silifikasi pada lintasan 8 dan 9.
Controlled Source Audio Frequency Magnetotelluric (CSAMT) method is using an artificial to obtain a stable signal by injecting current from the transmitter and received by the receiver. Using preset frequency is 6400 Hz frequency - 2 Hz with a target depth of> 1 km and a long measurement time of 30 minutes, in each point of measurement. The measurement results obtained a magnetic field and electric field. and then use the equation Cagniard to get an apparent resistivity values. Measurements were taken in the area ?A? with type epithermal hydrothermal system. From the field data editing and smoothing process is carried out using software CMTpro. For the inversion is using a Bostik Inversion method with MTsoft2D.
CSAMT method is supported by other geophysical methods such as IP, resistivity and megntic. CSAMT method can provide subsurface with a deeper penetration of the gold zone, supported method for distributing IP, resistivity and magnetic fields to obtain the correlation in the lower depth. The processing results is present in 2D with surfer 9 and 3D software with software Geoslicer-X. There is a correlation of results with a response CSAMT resistivity > 350 Ohm.m at a depth of 400 meters and reinforced the supporting data with the resistivity method resistivity > 350 Ohm.m with an undulation magnetic response profile, and high PFE values > 4%, which is a silicified zone on lines 8 and line 9.
Depok: Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2011
S1148
UI - Skripsi Open Universitas Indonesia Library
