Estimasi Karakteristik Reservoir Panas Bumi dari Sumber Mata Air Panas di Kecamatan Pauh Duo, Kabupaten Solok Selatan

Authors

  • Randa Permanda Jurusan Fisika FMIPA Universitas Andalas
  • Ardian Putra Jurusan Fisika FMIPA Universitas Andalas

DOI:

https://doi.org/10.25077/jfu.6.1.39-46.2017

Abstract

Dalam kegiatan eksplorasi pendahuluan dan proses pengembangan lapangan panas bumi, kandungan fluida panas bumi sangat berguna untuk memberikan perkiraan mengenai karakteristik reservoir panas bumi. Kandungan fluida panas bumi dapat memberikan gambaran mengenai temperatur dan jenis reservoir serta tipe fluida panas bumi. Konsentrasi dari unsur-unsur fluida panas bumi dapat dimanfaatkan untuk memperkirakan temperatur resevoir panas bumi dengan menggunakan persamaan geotermometer. Penelitian ini akan mengestimasi karakteristik reservoir panas bumi berdasarkan lima sumber mata air panas di Kecamatan Pauh Duo, Kabupaten Solok Selatan. Tipe fluida dan karakteristik reservoir panas buminya dipelajari melalui pengukuran pH, temperatur permukaan, dan uji kandungan mata air panas dengan menggunakan Atomic Absorption Spectrophotometer (AAS) dan spektrofotometer visible. Konsentrasi unsur yang diteliti yaitu Na, K, Ca, dan SiO2 dan didapatkan konsentrasi unsur dari urutan yang terbesar adalah Ca, Na, K, dan SiO2. Kandungan unsur ini dimasukkan ke dalam beberapa persamaan geotermometer, seperti persamaan geotermometer silika dan Na-K-Ca. Persamaan geotermometer yang cocok pada daerah penelitian adalah persamaan geotermometer Na-K-Ca dan silika amorf dengan nilai estimasi temperatur reservoir 224 oC–332 oC. Nilai estimasi temperatur reservoir mengindikasikan bahwa kelima sumber mata air panas berasal dari sistem reservoir yang sama. Nilai estimasi ini berada dalam kisaran nilai estimasi temperatur reservoir yang diperoleh oleh PT. Supreme Energy yaitu 210 oC – 320 oC. Mata air panas di daerah penelitian memiliki pH netral (6,8-7,4). Berdasarkan nilai ini, tipe fluida mata air panas di Kecamatan Pauh Duo, Kabupaten Solok Selatan adalah

alkali klorida dan sistem panas buminya didominasi oleh air.

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Published

2017-01-05

Issue

Vol. 6 No. 1 (2017)

Section

Articles

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Copyright (c) 2017 Randa Permanda, Ardian Putra

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