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"Kegiatan hulu migas memiliki risiko tinggi terkait K3 dan kegiatan pemboran menjadi risiko paling tinggi. 80% penyebab kecelakaan pemboran disebabkan oleh human performance. Tahun 2020, aktivitas pemboran di PT. X menyumbang kecelakaan sebesar 3 dari 8 kecelakaan dan penyebab umum kecelakaan yang terjadi karena faktor manusia. Unsafe acts dianggap menjadi penyebab utama dalam kecelakaan pemboran di industri migas. Maka, penelitian ini membahas mengenai analisis kasus kecelakaan pemboran pada industri migas di PT.X dari sudut pandang faktor manusia. Tujuan dari penelitian ini yaitu menganalisis faktor kontribusi dari kegagalan aktif dan laten dan menganalisis kasus kecelakaan kerja dari sudut pandang faktor manusia pada aktivitas pemboran yang terjadi di PT. X tahun 2022, serta menentukan rekomendasi untuk perbaikan kedepannya dari kegiatan pengeboran di PT. X. Metode penelitian ini menggunakan deskriptif analitik dari data sekunder dan hasil wawancara. Didapatkan hasil bahwa kondisi laten yang berkontribusi terhadap kecelakaan pemboran yang terjadi di PT. X pada tahun 2022 yaitu gagal mengupdate regulasi terbaru, pengendalian yang dilakukan masih bersifat administratif, kegagalan otoritas penerbit dalam mengecek kelengkapan berkas, tidak adanya pemeriksaan berkala yang terjadwal pada peralatan, gagal memastikan serah terima sumur dilakukan secara keseluruhan, penyusunan JSA kurang baik, gagal menyampaikan bahaya dan risiko secara detail, kegagalan koordinasi di internal kontraktor, gagal mengomunikasikan bahaya dan risiko yang sudah ada di risk assessment, dan kondisi jalan yang seharusnya sempit sehingga memilih permukaan yang miring. Sedangkan kegagalan aktif yang berkontribusi yaitu gagal menginterpretasikan peralatan yang rusak dan kondisi jalan yang berbahaya, tidak melalukan pengecekan kondisi sumur ketika hujan deras, dan pelanggaran SOP. Sehingga ditemukan bahwa kondisi laten lebih banyak berkontribusi sehingga menimbulkan kegagalan aktif atau unsafe acts. Kegagalan yang paling berkontribusi pada tiap layer HGACS-OGI yaitu organizational influences (organizational process), unsafe supervision (supervision violations), preconditions for unsafe acts (environmental factors - physical environment), dan unsafe acts (errors - perceptual errors). Sintesa dari hasil analisis didapat bahwa safety value belum tertanam di PT. X. Hal ini dapat dilihat dari pelaksanaan K3 belum dilakukan secara menyeluruh di lapangan, sehingga safety belum terintegrasi di dalam kegiatan operasi. Sehingga rekomendasi yang diberikan penulis yaitu menjadikan K3 sebagai safety of work.

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Upstream oil and gas activities have a high risk related to K3 and drilling activities are the highest risk. 80% of the causes of drilling accidents are caused by human performance. In 2020, drilling activities at PT. X accounts for 3 out of 8 accidents and common cause of accidents that occur due to human factors. Unsafe acts are the main cause of drilling accidents in the oil and gas industry. So, this study discusses the analysis of drilling accident cases in the oil and gas industry at PT.X from the point of view of human factors. The purpose of this study is to analyze the contributing factors of active and latent failure and analyze cases of work accidents from the point of view of human factors in drilling activities that occur at PT.X year 2022 and determine recommendations for future improvements from drilling activities at PT. X. This research method uses descriptive-analytical from secondary data and interview results. It was found that the latent condition contributed to the drilling accident that occurred at PT. X in 2022, namely the failure to update the latest regulations, the control carried out is still administrative in nature, the failure of the issuing authority to check the completeness of the files, the absence of scheduled periodic checks on the equipment, failing to ensure that the handover of the wells is carried out in its entirety, the preparation of the JSA is not good, failing to submit hazards and risks in detail, failure of internal coordination of contractors, failure to communicate the hazards and risks already in the risk assessment, and road conditions that should be narrow so that they choose a sloping surface. Meanwhile, active failures that contributed were failing to interpret damaged equipment and dangerous road conditions, not checking the condition of wells when it rained heavily, and violating SOPs. So, it was found that latent conditions contributed more to causing active failure or unsafe acts. The failures that contributed the most to each layer of HGACS-OGI were organizational influences (organizational process), unsafe supervision (supervision violations), preconditions for unsafe acts (environmental factors - physical environment), and unsafe acts (errors - perceptual errors). The synthesis of the analysis results obtained that the safety value has not been embedded in PT. X. This can be seen from the implementation of OHS that has not been carried out thoroughly in the field so safety has not been integrated into operational activities. The recommendation given by the author is to make OHS a safety of work."

"Human Factors Analysis and Classification System in Mining Industry (HFACS-MI) merupakan suatu metode investigasi kecelakaan untuk mencari faktor-faktor penyebab kecelakaan pada industri pertambangan. Metode HFACS sendiri telah banyak digunakan untuk investigasi kecelakaan diberbagai industri seperti penerbangan, konstruksi, kereta api, dan industri lainnya. Metode ini terdiri dari 5 (lima) tingkatan yaitu unsafe act, precondition for unsafe act, unsafe leadership, organizational influences, dan outside factor. PT. XYZ merupakan salah satu perusahaan pertambangan di wilayah Kalimantan Timur. Kecelakaan yang sudah terjadi tentunya membuat perusahaan mengalami kerugian, perlunya dilakukan kajian proses analisis secara detail untuk mengetahui faktor penyebab kecelakaan bersifat aktif dan laten serta mengetahui keterkaitan penyebab kecelakaan dari berbagai tingkat dengan menggunakan metode HFACS-MI.

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Human Factors Analysis and Classification System in Mining Industry (HFACS-MI) is an accident investigation method to find the factors that cause accidents in the mining industry. The HFACS method itself has been widely used for accident investigations in various industries such as aviation, construction, railroads, and other industries. This method consists of 5 (five) levels, namely unsafe act, precondition for unsafe act, unsafe leadership, organizational influences, and outside factors. PT. XYZ is a mining company in the East Kalimantan region. Accidents that have occurred certainly make the company suffer losses, it is necessary to study the analytical process in detail to find out the active and latent causal factors and find out the interrelationships of the causes of accidents from various levels using the HFACS-MI method."

"Industri pertambangan dipandang sebagai kategori industry dengan risiko tinggi. Jenis kecelakaan tambang lost time injury dan fatality merupakan kecelakaan dengan dampak major terhadap Grup Perusahaan X. Meskipun telah memiliki pedoman teknis pelaporan dan investigasi insiden serta dilakukan tindakan perbaikan, kecelakaan masih terus terjadi. Maka dari itu, penelitian ini bertujuan untuk mengidentifikasi tren penyebab kecelakaan tambang dan kelemahan sistem pertahanan berdasarkan konsep Human Factors Analysis Classification System in Mining Industry (HFACS-MI) di Grup Perusahaan X tahun 2021-2022. Penelitian ini merupakan penelitian deskriptif analitik dengan pendekatan semi kuantitatif. Hasil penelitian menunjukkan bahwa kelemahan sistem pertahanan active faiure yang sering ditemukan adalah tingkat unsafe acts kategori skill-based error. Sedangkan kelemahan sistem pertahanan latent failure yang sering ditemukan adalah tingkat unsafe leadership kategori inadequate leadership. Peneliti menyimpulkan bahwa masih banyak kelemahan pada sistem pertahanan active dan latent failure sehingga pencegahan kecelakaan masih belum optimal. Oleh karena itu, perlu dilakukan perbaikan di setiap tingkat sistem pertahanan, baik yang ditargetkan kepada individu maupun organisasi, agar kecelakaan dapat dicegah dan risiko kecelakaan dapat dikendalikan.

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The mining industry has been viewed as a high-risk industry. Types of mining accidents, such as lost time injuries and fatalities, have a significant impact at both the individual and organizational levels. Despite Group Company X having technical guidelines for incident reporting and conducting investigations with corrective actions, accidents continue to occur. Therefore, this study aims to identify trends in the causal factors of mining accidents and find weaknesses in defense systems based on the Human Factors Analysis Classification System in the Mining Industry (HFACS-MI) method. This research method uses an analytical descriptive approach with a semi-quantitative method. The results show that the most common weakness in the active failure defense system is the occurrence of unsafe acts in the skill-based error category. Additionally, the most common weakness in the latent failure defense system is inadequate leadership in the leadership category. The study concludes that there are still numerous weaknesses in the active and latent failure defense systems, which hinder optimal accident prevention. Improvements need to be made at all levels of the defense system, targeting both individuals and organizations, to prevent accidents and effectively control the risk of accidents."

"ABSTRAKMemprediksi besar tekanan surge dan swab sangat penting dalam proses pengeboran minyak dan gas bumi. Perhitungan tekanan surge dan swab yang akurat dapat memudahkan kita dalam merencanakan operasi pengeboran, khususnya pengeboran pada sumur yang membutuhkan safety yang tinggi, celah antara pipa pengeboran dan wellbore yang sempit dan pada sumur dengan kedalaman yang tinggi. Tekanan surge yang berlebihan dapat menyebabkan lost circulation dan retak formasi, sedangkan tekanan swab yang berlebihan dapat menyebabkan kick dan blowout, dimana untuk menyelesaikan permasalahan-permasalahan ini membutuhkan biaya yang sangat besar. Mengingat ribuan sumur dieksplorasi di tiap tahunnya, fenomena ini adalah hal penting bagi industri minyak dan gas bumi untuk meminimalisir biaya eksplorasi. Hasil studi teoritis dan lapangan telah menunjukan bahwa tekanan surge dan swab dipengaruhi oleh parameter-parameter seperti kecepatan pipa, geometri wellbore, faktor eksentrisitas, reologi fluida dan apakah pipa yang digunakan terbuka atau tertutup. Penelitian ini bertujuan untuk menganalisis besar karakteristik tekanan surge dan swab dalam skala laboratorium dengan variasi kecepatan pipa 0.08 m/s, 0.10 m/s, dan 0.12 m/s. Set-up alat terdiri dari ID 56 mm pipa akrilik dan OD 34 mm pipa besi yang dapat bergerak vertikal dengan menggunakan sistem angkat sederhana. Tekanan pada dinding sumur diukur menggunakan dua pressure transmitter dengan fluida pengeboran yang digunakan adalah air dan campuran 3500 ml air dan 150 gr bentonite. Dari hasil penelitian ini, kecepatan pipa pengeboran mempengaruhi besar tekanan surge dan swab. Kecepatan pipa terbesar 0.12 m/s menghasilkan gradien tekanan surge dan swab terbesar yaitu 0.0229 psi/ft dan 0.0256 psi/ft.

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ABSTRACTSurge and swab pressure prediction is very important in drilling process during well construction operations. Accurately predicting surge and swab pressure model can ease on planning drilling operation, mainly in wells with high safety environment, low-clearance casings and deep water wells. Excessive surge pressure can lead to a number of costly drilling problems such as lost circulation and formation fracture, while excessive swab pressure can result in kicks, and blowouts. As thousands of wells are drilled every year, this phenomenon is of economic importance for the oil industry. Recent theoretical and field studies have indicated that surge and swab pressure depends on many parameters such as drill pipe movement speed, wellbore geometry, eccentricity factor, fluid rheology, and whether the pipe is open-ended or closed-ended. The study aimed at analyzing the effects of pipe movement speed on surge and swab pressures under laboratory conditions. Experimental study was performed in a test setup that can varying the drill pipe movement speed and measuring the surge and swab pressures. The setup consists of ID 56 mm fully transparent polycarbonate tubing and OD 34 mm inner steel pipe, which moves vertically using a simple hoisting system. Pressure on the wall of the well was measured using two pressure transmitters at various drill pipe movement speed and drilling fluid in this experiments were conducted using water and water based mud which is 3500 ml water mixed with 150 gr bentonite. The experimental results showed that the speed of the drill string downward and upward affects surge and swab pressure. From the study, it was concluded that at the highest downward and upward speed of drill pipe, the surge and swab pressure increases respectively. Maximum speed of downward and upward drill pipe at 0.12 m/s results the highest surge pressure and swab pressure at 0.0229 psi/ft and 0.0256 psi/ft."

"ABSTRAKSkripsi ini membahas kasus kecelakaan Boeing 737-800 di Bandara Ngurah Rai, Bali tahun 2013 melalui investigasi HFACS Human Factors Analysis and Classification System . Tujuan penelitian ini untuk melihat kontribusi faktor manusia pada suatu kecelakaan di bidang aviasi. Penelitian ini adalah penelitian kualitatif dengan desain deskriptif. Hasil penelitian menyarankan upaya perbaikan terhadap faktor-faktor kontribusi kecelakaan seperti tindakan yang mengarah pada kecelakaan, pra-kondisi tidak aman, pengawasan yang kurang baik dan pengaruh organisasi.

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ABSTRACTThe focus of this study is investigating Boeing 737 800 accident in Ngurah Rai International Airport, Bali, 2013 using HFACS Human Factors Analysis and Classification System . The purpose of this study is to understand contributing of human factors in aviation accidents. This research is qualitative descriptive interpretive. The researcher suggests that corrective effort to contributing factors of accident such as unsafe acts, precondition for unsafe act, unsafe supervision and organizational influences."

"Kecelakaan laut sering kali terjadi di Indonesia namun seiring berjalannya waktu belum tampak penyelesaian terhadap masalah ini. Hal ini terlihat dengan masih tingginya tingkat kecelakaan laut di Indonesia. Dalam suatu kecelakaan, faktor manusia sangat dominan menjadi penyebab hal tersebut terjadi, di mana para awak berperan besar dalam terjadinya kecelakaan. Penelitian ini membahas peran awak dari sisi kulifikasi yang dimiliki serta perilaku aktual yang terjadi di lapangan pada kapal feri jalur penyeberangan Merak-Bakauheni. Kapal feri dipilih karena kapal feri merupakan kapal yang mengangkut penumpang dan barang di mana potensi kecelakaan dan akibat kehilangan nyawa yang besar terdapat pada jenis kapal ini. Selain itu jalur penyeberangan Merak-Bakauheni merupakan salah satu jalur penyeberangan yang paling ramai di Indonesia. Dari penelitian ini didapat ternyata kualifikasi awak kapal feri Jalur penyeberangan Merak-Bakauheni masih jauh dari standar yang dipersyaratkan walaupun hampir semuanya memiliki ijazah pelaut terlihat dengan adanya pelanggaran-pelanggaran yang terus terjadi terhadap aspek keselamatan tanpa adanya sanksi dan perbaikan atas perilaku tersebut.

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Marine accidents often occur in Indonesia, but over time have not looked towards the settlement of this issue. This is still visible with the high level of marine accidents in Indonesia. In an accident, human factors are the dominant cause of a case occurs, where the crew of a role in the accident.

This study discusses the role of the crew from qualification view also the actual behavior and that happens on the field at the ferry crossing paths Merak-Bakauheni.

Ferry was selected because a ferry boat that carry passengers and goods in which the potential for accidents and loss of life due to the large ships are on this type. In addition, path-crossing Merak-Bakauheni is one of the lines crossing the most crowded in Indonesia.

From this research we get that qualification of crew at ferry crossing path Merak-Bakauheni still far from the required standard even though almost all have seen competent sailor with the violations of safety aspects that continue to occur without the sanctions and improvements to any of the behavior."

"ABSTRAKDalam dunia pengeboran, terdapat istilah sumur cluster yang dimana dalam satusumur terdapat beberapa titik pengeboran yang mempunyai posisi sejajar satusama lain dengan jarak antara 10 m hingga 20 m. Dalam sumur cluster, proses rigup dan rig down menjadi tidak efisien karena membutuhkan waktu yang lebihlama sehingga biaya operasi menjadi lebih besar. Sehingga dalam hal ini,pendorong rig sliding menjadi salah satu alat yang dianggap jauh lebih efektifdalam memangkas waktu dibandingkan dengan metode konvensional yaitudengan rig up dan rig down. Dalam hal ini komponen gripper adalah salah satukomponen yang terdapat di pendorong sliding rig yang berperan sebagaipenahan dalam mekanismenya. Penulisan ini bertujuan untuk merancangkomponen gripper dengan menggunakan material yang terdapat di produsen lokalsehingga komponen dapat dibuat secara mandiri oleh negara Indonesia.

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ABSTRACTIn term of Drilling world. There is cluster well which have multi point ofdrilling hole in parallel position respect with each other. The distance of thiscluster section have about 10m until 20 m for each other hole. In Cluster Well,the rig up and rig down process became inefficiently process because this processrequire more time so the drilling operation cost become ekspensive. In this case,the Sliding Drilling Rig Mover become more efective to cut off the time than theconvesional method which using rig up and rig down. In this Mover, therer iscomponent which called Gripper. This Component have role as Holder to hold theaction force from hydraulic which to push the substructure. This study aimed todesign Gripper components using materials which can be found at localprodusen so with the result that, the components can be independent produced byIndonesia"

"Secara alami, produksi minyak dan gas (migas) akan mengalami penurunan(decline). Berbagai upaya dilakukan untuk mempertahankan tingkat produksimigas sekaligus meningkatkan produksinya. Salah satu upaya adalah denganmelakukan pemboran sumur baru. Kegiatan pemboran merupakan suatu kegiatanyang memiliki Risiko Bahaya kategori Tinggi. Mitigasi harus dilakukan untukmengurangi potensi bahaya dan mencegah terjadinya kecelakaan kerja.Ruanglingkup penelitian ini mencakup seluruh kegiatan utama yang ada pada suatukegiatan pemboran. Analisa risiko ditinjau dari aspek manusia, peralatan,lingkungan dan citra perusahaan. Metode Bow Tie dilakukan untuk melihat danmenganalisa risiko yang ada pada kegiatan pemboran di PT Pertamina EP. Untukmendukung data penelitian, juga dilakukan pengambilan data berupa kuesionerdari para pekerja yang terlibat di kegiatan pemboran PT Pertamina EP. Secaraumum sudah dilakukan mitigasi untuk kegiatan pemboran di PT Pertamina EPsehingga operasi pemboran tersebut berada pada kondisi aman. Beberapamasukan hasil penelitian ditujukan untuk meningkatkan keamanan operasipemboran PT Pertamina EP

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Naturally, oil and gas production will decline. Some efforts have to do to keep oil

and gas production rate as well as to increase the production. One of them is

drilling new well. Basically, hazards in drilling activities are categorized as High

Risk. Mitigation should be done to reduce the potential hazards and prevent

accidents.The scope of this study covers all the major events that exist in a drilling

activities. Analysis of risk in terms of aspects of human, equipment, environment

and corporate image. Bow Tie method is performed to see and analyze the risks

involved in drilling activity in the PT Pertamina EP. To support research data,

also conducted a questionnaire data collection from the workers involved in the

drilling activities of PT Pertamina EP. In general, mitigation has been carried out

for drilling activities at PT Pertamina EP so that the drilling operations are in safe

condition. Some input the results of research aimed at improving the safety of

drilling operations of PT Pertamina EP."

"Kecelakaan kerja menyebabkan terhentinya proses bekerja. Kondisi tidak aman di tempat kerja, atau praktik yang tidak aman dari sesama karyawan, dapat mengganggu orang dan merusak kinerja mereka. Salah satu upaya perusahaan dalam mencegah terjadinya kecelakaan adalah dengan melakukan safety inspection. Skripsi ini membahas tentang evaluasi pelaksanaan safety safety inspection di area kerja drilling oleh PT. Surveyor Indonesia – Drilling & Completion Safety Compliance Audit pada tahun 2012. Penelitian ini merupakan penelitian semi kuantitatif. Untuk melakukan evaluasi, digunakan International Safety Rating System edisi ke-enam tahun 1996, yaitu elemen ketiga mengenai safety inspection. Kerangka konsep penelitian ini diambil dari variabel-variabel yang ada pada ISRS. Secara keseluruhan hasil penilaian safety inspection di PT. Surveyor Indonesia – DCSCA adalah 100 %, bahwa semua sasaran, target, serta pelaksanaan safety inspection sudah sesuai dengan elemen-elemen yang ada dalam International Safety Rating System.

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Workplace injury causes the cessation of the work process. Unsafe conditions in the workplace, or unsafe actions from the workers, could disturb and damage the work performance. One of the company’s efforts to prevent accidents in to do a safety inspection program.This thesis discusses the evaluation of the safety inspection in area of work drilling by PT. Surveyor Indonesia- Drilling & Completion Safety Compliance Audit in 2012. This research is a semi-quantitative. To perform the evaluation, use the International Safety Rating System (ISRS) the sixth edition 1996, the third element of the safety inspection. Conceptual framework were taken from the variables that exist in the ISRS. Overall, of safety inspection at PT. Surveyor Indonesia - DCSCA is 100%, that all goals, targets, and implementation of safety inspection is in accordance with the elements that exist in the International Safety Rating System."

"[Daerah prospek panas bumi Gunung Arjuno dan Gunung Welirang berada pada jalur vulkanik yang dikenal dengan jalur ring of fire, yaitu rentetan gunung api, baik yang aktif, maupun gunung api yang tidak aktif. Gunung tersebut berasosiasidengan pembentukan sistem panas bumi yang ditandai dengan kemunculan manifestasi yang terdiri dari mata air panas Padusan, Coban dan Cangar serta adanya fumarol yang terdapat di komplek Gunung Welirang. Dari hasil perhitungan geothermometer daerah prospek panas bumi Gunung Arjuno danGunung Welirang memiliki temperatur 250o C dan masuk dalam kategori high temperature (>225 oC). Untuk mengetahui batas, kedalaman, dan geometri dari reservoir yang ada, dilakukan pengukuran dengan metode Magnetotellurik (MT), Time Domain Electromagnetic (TDEM) dan gaya berat. Dari hasil pengukurantersebut, dilakukan pemodelan pada 138 data MT, 103 data TDEM dan 253 data gaya berat. Selanjutnya hasil pemodelan dianalisa dengan menggunakan penampang 1 dimensi, 2 dimensi dan visualisasi 3 dimensi. Karakteristik reservoir berada pada kisaran 10-30 Ohm-m dengan nilai densitas rata-rata 2.2gr/cc dan menghasilkan prospek panas Gunung Arjuno dan Gunung Welirang sekitar 40 km2 dengan potensi yang dapat dikembangkan untuk pembangkit tenaga listrik sebesar 140 MWe, rekomendasi penentuan titik bor eksplorasi berada di 2 km baratlaut dari komplek Gunung Welirang.

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The geothermal prospect areas Mount Arjuno and Mount Welirang is on track which is known as volcanic ring of fire, which is a series of volcanoes, both active and inactive volcanoes. The mountain is associated with the formation of geothermal systems that are characterized by the appearance of manifestations consisting of Padusan, Coban and Cangar hot springs and their fumaroles located

in Mount Welirang complex. From the calculation geothermometer, the geothermal prospect areas Mount Arjuno and Welirang has a temperature of 250°C and in the category of high temperature (190 oC-236 oC). To determine the

boundary, the depth, and the geometry of the existing reservoir, measured by the method of magnetotelluric (MT), Time Domain Electromagnetic (TDEM) and gravity. From the results of these measurements, modeling performed on the 138

MT data, 103 TDEM data and 253 gravity data. Furthermore, the modeling results were analyzed using 1 dimensional cross-section, 2 dimensional and 3 dimensional visualization. The position of the reservoir is in the range of 10-30 Ohm-m with an average density value 2.2 g/CC3 to generate hot prospects Mt.Arjuno and Mount Welirang approximately 40 km2. with potential developed for power plants of 140 MWe, recommendations exploration drill point

determination located at 3km north-west of the mountain complex Mount Welirang.;The geothermal prospect areas Mount Arjuno and Mount Welirang is on track

which is known as volcanic ring of fire, which is a series of volcanoes, both active

and inactive volcanoes. The mountain is associated with the formation of

geothermal systems that are characterized by the appearance of manifestations

consisting of Padusan, Coban and Cangar hot springs and their fumaroles located

in Mount Welirang complex. From the calculation geothermometer, the

geothermal prospect areas Mount Arjuno and Welirang has a temperature of

250°C and in the category of high temperature (190 oC-236 oC). To determine the

boundary, the depth, and the geometry of the existing reservoir, measured by the

method of magnetotelluric (MT), Time Domain Electromagnetic (TDEM) and

gravity. From the results of these measurements, modeling performed on the 138

MT data, 103 TDEM data and 253 gravity data. Furthermore, the modeling results

were analyzed using 1 dimensional cross-section, 2 dimensional and 3

dimensional visualization. The position of the reservoir is in the range of 10-30

Ohm-m with an average density value 2.2 g / CC3 to generate hot prospects

Mt.Arjuno and Mount Welirang approximately 40 km2. with potential developed

for power plants of 140 MWe, recommendations exploration drill point

determination located at 3km north-west of the mountain complex Mount

Welirang.;The geothermal prospect areas Mount Arjuno and Mount Welirang is on track

which is known as volcanic ring of fire, which is a series of volcanoes, both active

and inactive volcanoes. The mountain is associated with the formation of

geothermal systems that are characterized by the appearance of manifestations

consisting of Padusan, Coban and Cangar hot springs and their fumaroles located

in Mount Welirang complex. From the calculation geothermometer, the

geothermal prospect areas Mount Arjuno and Welirang has a temperature of

250°C and in the category of high temperature (190 oC-236 oC). To determine the

boundary, the depth, and the geometry of the existing reservoir, measured by the

method of magnetotelluric (MT), Time Domain Electromagnetic (TDEM) and

gravity. From the results of these measurements, modeling performed on the 138

MT data, 103 TDEM data and 253 gravity data. Furthermore, the modeling results

were analyzed using 1 dimensional cross-section, 2 dimensional and 3

dimensional visualization. The position of the reservoir is in the range of 10-30

Ohm-m with an average density value 2.2 g / CC3 to generate hot prospects

Mt.Arjuno and Mount Welirang approximately 40 km2. with potential developed

for power plants of 140 MWe, recommendations exploration drill point

determination located at 3km north-west of the mountain complex Mount

Welirang.;The geothermal prospect areas Mount Arjuno and Mount Welirang is on track

which is known as volcanic ring of fire, which is a series of volcanoes, both active

and inactive volcanoes. The mountain is associated with the formation of

geothermal systems that are characterized by the appearance of manifestations

consisting of Padusan, Coban and Cangar hot springs and their fumaroles located

in Mount Welirang complex. From the calculation geothermometer, the

geothermal prospect areas Mount Arjuno and Welirang has a temperature of

250°C and in the category of high temperature (190 oC-236 oC). To determine the

boundary, the depth, and the geometry of the existing reservoir, measured by the

method of magnetotelluric (MT), Time Domain Electromagnetic (TDEM) and

gravity. From the results of these measurements, modeling performed on the 138

MT data, 103 TDEM data and 253 gravity data. Furthermore, the modeling results

were analyzed using 1 dimensional cross-section, 2 dimensional and 3

dimensional visualization. The position of the reservoir is in the range of 10-30

Ohm-m with an average density value 2.2 g / CC3 to generate hot prospects

Mt.Arjuno and Mount Welirang approximately 40 km2. with potential developed

for power plants of 140 MWe, recommendations exploration drill point

determination located at 3km north-west of the mountain complex Mount

Welirang.;The geothermal prospect areas Mount Arjuno and Mount Welirang is on track

which is known as volcanic ring of fire, which is a series of volcanoes, both active

and inactive volcanoes. The mountain is associated with the formation of

geothermal systems that are characterized by the appearance of manifestations

consisting of Padusan, Coban and Cangar hot springs and their fumaroles located

in Mount Welirang complex. From the calculation geothermometer, the

geothermal prospect areas Mount Arjuno and Welirang has a temperature of

250°C and in the category of high temperature (190 oC-236 oC). To determine the

boundary, the depth, and the geometry of the existing reservoir, measured by the

method of magnetotelluric (MT), Time Domain Electromagnetic (TDEM) and

gravity. From the results of these measurements, modeling performed on the 138

MT data, 103 TDEM data and 253 gravity data. Furthermore, the modeling results

were analyzed using 1 dimensional cross-section, 2 dimensional and 3

dimensional visualization. The position of the reservoir is in the range of 10-30

Ohm-m with an average density value 2.2 g / CC3 to generate hot prospects

Mt.Arjuno and Mount Welirang approximately 40 km2. with potential developed

for power plants of 140 MWe, recommendations exploration drill point

determination located at 3km north-west of the mountain complex Mount

Welirang., The geothermal prospect areas Mount Arjuno and Mount Welirang is on track

which is known as volcanic ring of fire, which is a series of volcanoes, both active

and inactive volcanoes. The mountain is associated with the formation of

geothermal systems that are characterized by the appearance of manifestations

consisting of Padusan, Coban and Cangar hot springs and their fumaroles located

in Mount Welirang complex. From the calculation geothermometer, the

geothermal prospect areas Mount Arjuno and Welirang has a temperature of

250°C and in the category of high temperature (190 oC-236 oC). To determine the

boundary, the depth, and the geometry of the existing reservoir, measured by the

method of magnetotelluric (MT), Time Domain Electromagnetic (TDEM) and

gravity. From the results of these measurements, modeling performed on the 138

MT data, 103 TDEM data and 253 gravity data. Furthermore, the modeling results

were analyzed using 1 dimensional cross-section, 2 dimensional and 3

dimensional visualization. The position of the reservoir is in the range of 10-30

Ohm-m with an average density value 2.2 g / CC3 to generate hot prospects

Mt.Arjuno and Mount Welirang approximately 40 km2. with potential developed

for power plants of 140 MWe, recommendations exploration drill point

determination located at 3km north-west of the mountain complex Mount

Welirang.]"