DETAIL KOLEKSI

Penentuan Potensi Reserpoir Panas Bumi, Dari Hasil Pemodelan Hidrogeologi Menggunakan Analisis Metode Geokimia Fluida Di Lapangan Panas Bumi "alel", Kabupaten Lebong , Provinsi Bengkulu


Oleh : Nathanael Christian

Info Katalog

Nomor Panggil : 873/TG/2018

Penerbit : FTKE - Usakti

Kota Terbit : Jakarta

Tahun Terbit : 2018

Pembimbing 1 : Fajar Hendrasto

Pembimbing 2 : Mulyanto

Subyek : Geothermal;Geochemistry - Water

Kata Kunci : upflow, outflow, geochemical methods, alteration, potential reserves, scaling, modeling. SSI


File Repositori
No. Nama File Ukuran (KB) Status
1. 2018_TA_GL_072001300080_Halaman-Judul.pdf 3552.97
2. 2018_TA_GL_072001300080_Bab-1.pdf 1313.8
3. 2018_TA_GL_072001300080_Bab-2.pdf 2405.51
4. 2018_TA_GL_072001300080_Bab-3.pdf 3076.79
5. 2018_TA_GL_072001300080_Bab-4.pdf 5894.32
6. 2018_TA_GL_072001300080_Bab-5.pdf 988
7. 2018_TA_GL_072001300080_Bab-6.pdf 805.81
8. 2018_TA_GL_072001300080_Daftar-Pustaka.pdf 950.82

L Lapangan panasbumi “Alel” berada di Kabupaten Lebong, Provinsi Bengkulu. Objek yang diteliti dalam penelitian ini berupa karakteristik geokimia dari manifestasi permukaan panas bumi yang muncul di permukaan serta alterasi mineral di daerah penelitian. Terdapat dua jenis manifestasi yang muncul yaitu mata air panas dan fumarol. Mata air panas yang muncul ke permukaan berupa tipe air sulfat, air bikarbonat, air klorida dan air sulfat-klorida. Manifestasi ini muncul akibat aktivitas tektonik yang bekerja di daerah penelitian. Terdapat tiga jenis zonasi mineralisasi di daerah penelitian yaitu zona argilik, zona transisi dan zona propilitik. Daerah penelitian memiliki sistem panasbumi berelief tinggi dengan entalpi yang tinggi serta memiliki kisaran suhu 258 ˚C sampai 306 ˚C. Zona upflow pada daerah penelitian berada di bagian Selatan daerah penelitian. Arah aliran fluida panasbumi mengalir ke zona outflow yang berada di bagian Utara. Cadangan pada daerah “Alel” berdasarkan perhitungan rapat daya sebesar 214 MWe pada suhu reservoir 275 ˚C , sedangkan berdasarkan metode volumetrik memiliki potensi sebesar 190 MWe pada suhu reservoir 275 ˚C dengan ketebalan reservoir 1607m . Potensi terbentuknya skaling silika kecil, dengan nilai SSI yaitu 0.85 dan potensi korosi pipa kecil karena tidak ditemukan mineral asam. Pemodelan sistem panasbumi dibuat berdasarkan data geotermometer fluida dan gas serta log pemboran sumur produksi beserta arah pemborannya.

“Alel” prospect area is administratively located in Lebong District, Bengkulu Province. Object of research in this study are the geochemical characteristics of the geothermal surface manifestations that appear on the surface and alteration of minerals in this area. There are two types of manifestation that occur, those are hot springs and fumaroles. The hot springs that come to the surface have a high temperature with sulfuric water type, water bicarbonate, chloride water, sulfuricchloride water. These manifestations appear due to tectonic activity that works in the area of research. This field is dominated by volcanic rock lithology. There are three types of mineral alteration zonation, argilic zone, transition zone and propylitic zone. This geothermal system is high terrain geothermal system with geotermometer calculation results indicate this field has a high enthalpy geothermal systems with a temperature range of 258ºC to 306ºC. Upflow zone of this field is in the south of the study area. Fluid flows into the North toward the outflow zones are located in the North. Reserves in “Alel” field is based on the calculation of the power density of 214MWe, while the volumetric methods based on a potential of 190 MWe at reservoir temperature of 275ºC with a thickness of reservoir 1607m. The potential of silica scaling is minor because the SSI is 0.85 and the potential corrosion of the pipe is minor because there are no acid mineral. Modeling of this geothermal system is based on fluids geothermometer,gas geothermometer and production well log with the direction.

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