Path: Top > S1-Final Project > Petroleum Engineering-FTTM > 2017

NATURAL STATE MODELING OF MATALOKO GEOTHERMAL FIELD, FLORES ISLAND, EAST NUSA TENGGARA, INDONESIA USING TOUGH2 SIMULATOR

Undergraduate Theses from JBPTITBPP / 2017-09-28 13:53:31
Oleh : YEHEZKIEL DAVID PRADHIPTA (NIM : 12213085), S1 - Petroleum Engineering-FTTM
Dibuat : 2017-09-28, dengan 1 file

Keyword : Ulumbu, Natural State, Modeling, TOUGH2, Reserve Estimation.

Mataloko Geothermal Field is located approximately 15 km east of Bajawa City in Southern Central Flores Island, Indonesia. The geothermal system of this field is two-phase dominated with steam dominated zone at the

shallower part of the field and liquid dominated at the deeper part with temperature of 210oC and 275oC, respectively. From the exploration effort and reliminary study, the possible reserve of this field is up to 69 MWe (PLN, 2016). This study was carried out by numerical natural state modeling using TOUGH2 simulator. The objective of this study is to present numerical modeling of the Mataloko Geothermal Field based on the published paper of previous geological, geophysical, and geochemical study, also the actual measurements on the established wells. The model was matched with actual shut-in temperature and pressure measurement on Well MT-3, also mass and heat flow on the established conceptual model to achieve natural state condition. The results conclude that the area of the reservoir is up to 10.2 km2 with exploitable reservoir thickness up to 1750 meter. Temperature of the suspected productive deep liquid dominated reservoir is 275oC. The final permeability of the reservoir is ranging from 18-

40 mD with exceptional 91.5 mD at the main fault. Furthermore, this study propose a more accurate revision on the established conceptual model specifically on the shallow vapor region. The potential reserve was calculated using Monte Carlo simulation based on the simulation result. Calculated potential reserve is 52 MWe with 90% confidence level (P10). Expansion of 5x10 MWe power plant capacity is suggested by drilling effort to elevation of -1000 to 0 masl through the productive hot deep liquid dominated zone. This is the first natural state reservoir modeling of Mataloko Geothermal Field and the second natural state modeling for geothermal field reservoir in Eastern Indonesia that has been established successfully, and also the first revision proposal to the established Mataloko Geothermal Field conceptual model.

Deskripsi Alternatif :

Lapangan panas bumi Mataloko terletak di 15 km sebelah timur Kota Bajawa di bagian selatan tengah pulau Flores, Indonesia. Sistem geotermal lapangan ini adalah dua fasa dengan dominan uap di zona dangkal dan dominan air di zona lebih dalam. Temperatur reservoir adalah 210oC dan 275oC untuk dominan uap dan dominan air. Dari studi pendahuluan dan eksplorasi, lapangan ini memiliki possible reserve mencapai 69 MWe (PLN, 2016). Studi ini dilakukan dengan membuat numerical natural state dengan TOUGH2 simulator. Studi ini bertujuan untuk memberikan natural state model berdasar studi pendahuluan dan pengukuran aktual di sumur yang sudah ada. Model dicocokkan dengan studi geologi, geokimia, dan geofisika serta pengukuran tekanan dan temperatur aktual di sumur MT-3. Pencocokkan juga dilakukan dengan aliran massa dan panas di model konseptual yang sudah ada. Hasil studi meniyimpulkan bahwa area reservoir dari hasil simulasi menghasilkan 10.2 km2 dengan ketebalan 1750 meter. Temperatur dari perkiraan reservoir dominasi air dalam yang produktif adalah 275oC. Permeabilitas final dari reservoir adalah 18-40 mD dengan nilai lebih tinggi di 91.5 mD di zona patahan utama. Lebih jauh, studi ini memberikan saran perbaikan yang lebih akurat terhadap konseptual model yang sudah ada, terutama di zona dominasi uap dangkal. Potential reserve dihitung dengan menggunakan Monte Carlo simulation dan menghasilkan 52 MWe dengan tingkat kepercayaan 90% (P10). Pengembangan 5x10 MWe dengan usaha pengeboran di elevasi -1000 sampai 0 mdpl disarankan. Studi ini adalah natural state reservoir modeling pertama dari lapangan panas bumi Mataloko, dan juga dengan usaha proposal pertama untuk merevisi konseptual model lapangan panas bumi Mataloko yang sudah ada.

Copyrights : Copyright (c) 2001 by Perpustakaan Digital ITB. Verbatim copying and distribution of this entire article is permitted by author in any medium, provided this notice is preserved.

Beri Komentar ?#(0) | Bookmark

PropertiNilai Properti
ID PublisherJBPTITBPP
OrganisasiS
Nama KontakUPT Perpustakaan ITB
AlamatJl. Ganesha 10
KotaBandung
DaerahJawa Barat
NegaraIndonesia
Telepon62-22-2509118, 2500089
Fax62-22-2500089
E-mail Administratordigilib@lib.itb.ac.id
E-mail CKOinfo@lib.itb.ac.id

Print ...

Kontributor...

  • Pembimbing 1 : Dr. Eng. Ir. Sutopo, M.Eng

    Pembimbing 2 : Heru Berian Pratama, S.T., M.T., Editor: Suharsiyah

File PDF...