METODE MT, CSAMT, DAN TDEM TERINTEGRASI UNTUK MENDESAIN MODEL KONSEPTUAL PANAS BUMI LAPANGAN WAYANG WINDU JAWA BARAT
DOI:
https://doi.org/10.31315/jmel.v1i2.2039Keywords:
MT, CSAMT, TDEM, slope resistivitas, gradien resistivitas, gradien suhu, panas bumiAbstract
Lapangan Panas Bumi Wayang Windu, Jawa Barat merupakan lapangan yang sudah beroperasi dan dalam tahap pengembangan. Untuk meningkatkan produksi maka harus ditemukan area prospek baru dengan membangun konseptual model panas bumi yang lebih detil. Metode Magnetotelluric (MT), Controlled Source Audio-Frequency Magnetotelluirc (CSAMT), dan Time Domain Electromagnetic (TDEM) merupakan metode geofisika elektromagnetik yang efektif dalam menggambarkan konseptual panas bumi berdasarkan kontras nilai resistivitas batuan di bawah permukaan. Efek heterogenitas medium di dekat permukaan menyebabkan efek pergeseran statik pada kurva resistivitas semu, sehingga perlu dikoreksi menggunakan data Time Domain Electromagnetic (TDEM). Informasi geologi berupa struktur sesar dan variasi litologi serta informasi suhu, kedalaman reservoar dan kondisi litologi bawah permukaan dari data lubang bor diperlukan pada tahap interpretasi. Hubungan antara slope resistivitas, gradien resistivitas (RG), serta gradien suhu dapat digunakan memprediksi klasifikasi potensi sumur dari produksi sangat tinggi sampai sangat rendah. Interpretasi model resistivitas bawah permukaan menunjukan nilai resistivitas overburden >40 ohm.m, batuan penudung <5 ohm.m, batuan reservoar >5 – 40 ohm.m, dan sumber panas >100 ohm.m. Kedalaman top of reservoir bervariasi dari 750 – 900 meter di bawah permukaan. Integrasi data geofisika, geologi, dan sumur menghasilkan model konseptual panas bumi lapangan Wayang Windu yang merepresentasikan zona up flow, out flow, primary recharge, secondary recharge, patahan, rekahan, dan sebaran litologi bawah permukaan.
References
Abrenica, Angelina B., Agung Harijoko, Yudi Indra K., and Ian Bogie. 2010. Characterization of Hydrothermal Alteration in Part of the Northen Vapour-Dominated Reservoir of the Wayang Windu Geothermal Field, West Java. Procceding Geothermal Congress, Bali-Indonesia.
Alzwar, M., Akbar, N., dan Bachri, S. 1992. Peta Geologi Lembar Garut dan Pameungpeuk, Jawa Barat , skala 1:100.000. Puslitbang Geologi, Bandung
Árnason, H., Kristmannsdóttir, H., Torfason, H., and Ólafsson, M., 2000. Natural changes in unexploited high-temperature geothermal areas in Iceland. Proceedings of the World Geothermal Congress 2000, Kyushu-Tohuku, Japan, 521-526.
Bogie, Ian, Yudi Indra K. and Merry C. Wisnandary. 2008, Overview of the Wayang Windu geothermal field, West Java, Indonesia, Jurnal Elsevier Geothermics, 37: 347-365.
Grandis, Hendra. 2008. Pemodelan Inversi Geofisika. Jakarta: Badan Meteorologi dan Geofisika
Grant, F.S., and West G.E., 1965, Interpretation Theory in Applied Geophysics. McGraw Hill
Hochstein, M.P., and P.R.L, Browne (2000), Surface Manifestation of Geothermal System with Volcanic Heat Source, in Encyclopedia of Volcanoes.
Hochstein, M. P. and Sudarman, S., 2008, History of Geothermal Exploration in Indonesia from 1970 to 2000, Geothermics 37, P. 220-226.
Kebede, Y., 2001. Application of the resistivity method in the Krísuvík geothermal area, Reykjanes Peninsula, SW-Iceland. UNU, G.T.P., Iceland, report 6 appendices, p. 115-142
Saptadji, N. M., 2003. Diktat Kuliah Teknik Panasbumi. Departemen teknik Perminyakan. Institut Teknologi Bandung
Sudarman, S., R. Pujianto dan B. Budiarjo, 1986, The Gunung Wayang Windu Area in West Java, Procceding Indonesia Petroleum Association.
Rodriguez, O. D, 2001, OCCAM and Bostick 1D Inversion of Magnetotelluric Sounding in Chicxulub Impact Crater, Yucatan, Mexico, Geofisica Internacional. Vol.40, No.4 : 271-283.
Rosid, Syamsu. 2011. Teori Inversi. Geofisika Universitas Indonesia
Roy, K.K., 2008. Potential Theory in Applied Geophysics. New York: Springer Berlin Heidelberg
Downloads
Published
Issue
Section
License
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
