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Jalan Barong Tongkok No.4 Gunung Kelua Samarinda, East Kalimantan Province Indonesia - 75123
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Geosains Kutai Basin
Published by Universitas Mulawarman
ISSN : -     EISSN : 26155176     DOI : https://doi.org/10.30872/geofisunmul.v5i2
Core Subject : Science,
Earth & Planetary Sciences
Coastal and Ocean Dynamics Environmental of Geophysics Geodesy and Geography Geographic Information System Geology Geophysics Exploration Geotechnical/ geo-engineering Hazard Mitigation Hydrology Meteorology and Climatology Mining Engineering Seismology and Volcanology Oceanography
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Geofisika
Articles 108 Documents
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INTERPRETASI POLA SEBARAN INDIKASI MUDVOLCANO DI SURYANATA SAMARINDA DENGAN METODE GEOLISTRIK KONFIGURASI WENNER-SCHLUMBERGER Wiranata, Doni; Natalisanto, Adrianus Inu
GEOSAINS KUTAI BASIN Vol 1 No 2 (2018)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v1i2.282

Abstract

This research was conducted to know the indication of mud volcano distribution pattern using geoelectric method. This research began with geological mapping along the geoelectric path and then retrieved the data using the Wenner-Schlumberger configuration. Then the field data was processed using Res2dinv software to display cross section of each path. Interpretation of the presence of mudvolcano was indicated by resistivity value (4.5 ± 0.5) Ωm and chargeability value (60 ± 20) msec. The existence of mudvolcano was supported by the presence of bursts.mudvolcano, geoelectric method, Chargeability, Resistivity
Studi Karakteristik Reservoir Berdasarkan Data Petrofisika (Studi Kasus Lapangan “X” Lemigas Cekungan Sumatera Selatan) Hadi Kusuma, Mohammad Felik; Lepong, Piter; Arifullah, Ery
GEOSAINS KUTAI BASIN Vol 6 No 1 (2023)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v6i1.1044

Abstract

Seiring dengan meningkatnya kebutuhan hidrokarbon maka diperlukan suatu upaya untuk mencari cadangan hidrokarbon yang baru, salah satu caranya untuk mencari hidrokarbon yaitu dilakukan pemboran atau well logging. Tujuan penelitian ini adalah untuk mengetahui pola geometri formasi, karakteristik batuan, dan apakah pada sumur tersebut termasuk dalam sumur prospek hidrokarbon ataupun tidak. Penelitian ini menggunakan data petrofisika dari Cekungan Sumatera Selatan yang didapat dari LEMIGAS. Data tersebut dianalisis secara kualitatif sehingga diperoleh hasil berupa kurva log, litologi formasi, dan juga kandungan hidrokarbon yang terdapat pada formasi. Dilanjutkan dengan analisis kuantitatif yang merupakan hasil dari karakteristik reservoir secara numerik. Hasil dari penelitian ini didapatkannya hidrokarbon berupa minyak yang terdapat pada kedalaman rata-rata sekitar 4200-4400 feet. Dari penelitian ini didapatkan hasil berupa kurva dari masing-masing logging, dari hasil yang telah didapat dapat disimpulkan bahwa didapatkan nilai indeks gamma ray sebesar 11.35%, nilai porositas sekitar 13.99%, nilai saturasi air sumur sebesar 16.84%, dan permeabilitas sebesar 519.855 mD Dari hasil analisis petrofisika yang telah dilakukan dapat diketahui Lapangan “X” LEMIGAS termasuk lapangan prospek hal ini dapat dilihat dari pengolahan data yang telah dilakukan, dan hasil perhitungan yang telah didapatkan sebelumnya.
IDENTIFIKASI SEBARAN DAN KETEBALAN LAPISAN BATUBARA BERDASARKAN DATA WELL LOGGING DI PT BORNEO EMAS HITAM LOA TEBU KALIMANTAN TIMUR Ernia, Yuyun; Djayus, Djayus; Supriyanto, Supriyanto
GEOSAINS KUTAI BASIN Vol 3 No 2 (2020)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v3i2.680

Abstract

The increase of coal demand must followed by the exploration, including distributin and thickness of coal seam. The data that has beeen used in this research was recondary data in the form of Well Logging data (Gammar Ray Log and Density Log) and coring data. Gamma Ray Log and Density Log was interpreted to obtain rock lithology, then processed by using software to obtain. Seread and thickness of coal seam, correlation between boreholes. The result are identification of seread direction, depth and thickness of coal seams bared on. Coal’s distribution analysis at research area, identified area of coal seams distribution. Relative to the southwest and north east. With four coal seams. Three seams having split or branching. Seam A with average thickness value 0,43 m, seam B with average thickness value 0,26 m and seam D with average thickness value 0,24 m. the widest seam distribution was seam A and B while the fewest seam was seam D.
ANALISIS HUBUNGAN NILAI HGI (HARDGROVE GRINDABILITY INDEX) ASH CONTENT INHERENT MOISTURE DAN TOTAL SULFUR TERHADAP NILAI KALORI BATUBARA DI PT. GEOSERVICES SAMARINDA KALIMANTAN TIMUR Yuliana, Yuliana; Djayus, Djayus; Munir, Rahmiati; supriyanto, Supriyanto
GEOSAINS KUTAI BASIN Vol 5 No 1 (2022)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v5i1.789

Abstract

Abstrak Kualitas batubara ditentukan oleh kandungan HGI, Ash Content, Inherent Moisture, Total Sulfur dan Kalori. Tujuan penelitian ini dilakukan untuk mengetahui hasil uji HGI, Ash Content, Inherent Moisture, Total Sulfur, kalori serta hubungannya dengan kalori batubara. Penelitian ini menggunakan data sekunder. Data selanjutnya dikelompokkan berdasarkan kelas kalori, kemudian dianalisis dengan regresi dan korelasi. Hasil penelitian ini adalah nilai rata-rata HGI kelas kalori sedang dan tinggi (5727, 6261) Cal/gr, Ash Content terhadap keempat kelas kalori (4609, 5600, 6361, 7394) Cal/gr, Inherent Moisture (4606, 5602, 6386, 7394) Cal/gr, Total Sulfur (4616, 5598, 6384, 7394) Cal/gr dan hubungan HGI terhadap kalori kelas sedang adalah positif dan kelas tinggi negatif, hubungan Ash Content terhadap setiap kelas adalah negatif, hubungan Inherent Moisture terhadap setiap kelas kalori adalah negatif dan hubungan Total Sulfur terhadap kalori kelas rendah dan tinggi adalah positif sedangkan kelas kalori sedang dan sangat tinggi adalah negatif. Kesimpulan dari penelitian ini adalah nilai rata-rata HGI (5727,6261) Cal/gr, Ash Content (4609, 5600, 6361, 7394) Cal/gr, Inherent Moisture (4606, 5602, 6386, 7394) Cal/gr serta Total Sulfur (4616, 5598, 6384, 7394) Cal/gr dan Hubungan HGI, Ash Content, Inherent Moisture dan Total Sulfur terhadap kalori rata-rata negatif kecuali HGI kelas sedang dan total sulfur kelas rendah dan tinggi dan berdasarkan hasil analisis interpretasi dari keempat parameter bahwa HGI tidak dapat menentukan kualitas batubara.
IDENTIFIKASI SEBARAN INDIKASI AIR TANAH DANGKAL TERKONTAMINASI LINDI DENGAN MENGGUNAKAN METODE RESISTIVITAS DAN INDUCED POLARIZATION (IP) DI SEKITAR TPA SAMBUTAN KOTA SAMARINDA Bamba, Ayub; Supriyanto, Supriyanto
GEOSAINS KUTAI BASIN Vol 2 No 2 (2019)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v2i2.475

Abstract

Sambutan of Samarinda City Landfill implements a sanitary landfill system in accordance with the applicable terms and conditions to minimize or eliminate environmental problems. This research was conducted around Sambutan of Samarinda which are in an area with coordinates 117 ° 06 '44.00 "BT, 00 ° 27' 36.00" LS - 117 ° 07 '11.00 "BT, 00 ° 27' 18.00" LS. In the five line was measured to obtain the values of apparent resistivity (ρa) and apparent chargeability (ma) each 3,250 data. These values are processed by the res2dinv program to obtain 2-D model. Furthermore, the modeling results are correlated to obtain 3-D models using Rockwork program. The results show that sanitary landfill waste treatment system does not have a negative impact on environment. The results of geoelectric modeling there is an indication of shallow groundwater which has the potential for leachate conta mination from lines 1 to 5 with a distribution of resistivity values 10.2 Ω.m to 81.6 Ω.m and distribution of chargeability values 6.32 msec to 10, 0 msec.
IDENTIFIKASI MATERIAL PASIR DESA SAMBERA MARANGKAYU MENGGUNAKAN XRF DAN XRD Muliawan, Arief
GEOSAINS KUTAI BASIN Vol. 1 No. 1 (2018)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v1i1.107

Abstract

Telah dilakukan penelitian tentang karakterisasi pada Pasir Sambera Marangkayu. Penelitian ini bertujuan untuk studi awal material penyusun sumber daya pasir yang bersumber dari alam. Sampel pasir kemudian dibersihkan dari kotoran kemudian dihaluskan dengan mengunakan ball milling. Setelah halus kemudian sampel dikarakterisasi menggunakan alat XRF dan XRD. Berdasarkan hasil XRF Pasir Sambera memiliki kandungan senyawa Si sebesar 79.1% -79.5 % dan Al sebesar 14.9% -15.2%. Jika dibandingkan dengan hasil XRD Pasir Sambera jarak bidang difraksi pada intensitas tertinggi (100%) yang dapat dilihat yakni pada sudut dan dengan bidang difraksi 3,33Å mengidentifikasi fase kuarsa. Dengan demikian pasir sambera dapat dimanfaatkan sebagai sumber Silika dan aluminium oksida.
IDENTIFIKASI KEBERADAAN JALUR GOA BAWAH TANAH (BUNKER) BERDASARKAN ANALISIS DATA MAGNETIK DI DESA JEMBAYAN ., Suryadi; Supriyanto, Supriyanto; Djayus, Djayus
GEOSAINS KUTAI BASIN Vol 4 No 1 (2021)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v4i1.721

Abstract

Existence of underground cave (bunker) in Jembayan has been known for long, but underground pathway was sealed and lost due to landslide. Goal of this research is to identify existence of underground cave (bunker) pathway based on magnetic data analysis. Topographic data acquisition with Theodolit and magnetic data acquisition with Geotron Model G5 Proton Memory Magnetometer at May 2nd 2019 with 98 observation point and space between observation point of 5 meters. Data processing carried out with diurnal variation corection, IGRF correction,. Upward continuation and reduce to pole. Modeling cared out by analyzing magnetic field anomaly that has been reduced to pole and upward continuation with 10 m height. Based on the analysis results and pathway cave magnetic data interpretation in Jembayan area shows existence of continuity from observation bunker and main bunker to north direction confirmed by higher magnetic field value between 230.1 to 2541 nT.
ANALISIS NILAI LOG GAMMA RAY DAN LOG DENSITY TERHADAPVARIASI KECEPATAN PEREKAMAN METODE WELL LOGGING “ROBERTSON GEOLOGGING (RG)” Khasanah, Ulfiatul; Supriyanto, Supriyanto; Djayus, Djayus
GEOSAINS KUTAI BASIN Vol 2 No 1 (2019)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v2i1.400

Abstract

The lithology of rocks in the subsurface can be known from the results of analysis of coring and geophysical logging. The activity of recording data geophysical logging in the work area of PT. Mintec Abadi generally uses a velocity of 3 m/minute - 4 m/minute with drill depths and different location points. The purpose of this study was to determenite the lithology pattern of rocks based on curves gamma ray log and density with record velocity variation of geophysical logging, and what is the optimal velocity. Records of data geophysical logging (Log Gamma Ray and Density Log) on well log tests with velocity variation, in the same lithology range of rocks, analyzed by the structure and pattern of the lithology, and compared to other velocity. The results of this study shows the lithological pattern of the record velocity variation (1.5 m/minute – 10 m/minute) give relatively the same results with the lithology arrangement is top soil, mudstone, coal and muddy sandstone. The optimal velocity of geophysical logging based on conditions in the work area of PT. Mintec Abadi between 5 m/minute – 7 m/minute.
ANALISIS TEKANAN PORI BAWAH PAnalysis of subsurface pore pressure is used to determine the potential problems that can occur in formation. The research purpose to determine sERMUKAAN MENGGUNAKAN METODE EATON PADA SUMUR ELNUSA BERDASARKAN DATA WELL LOGGING Datu, Bonaria; Djayus, Djayus; Natalisanto, Adrianus Inu
GEOSAINS KUTAI BASIN Vol 3 No 2 (2020)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v3i2.695

Abstract

Analysis of subsurface pore pressure is used to determine the potential problems that can occur in formation. The research purpose to determine subsurface pressure using the Eaton method and identify potential drilling problems, so prevention can be done to reduce accidents. Research on BD 325 wells is secondary data in the form of resistivity and density log data. Analysis of subsurface pressure is carried out using the Eaton method which results in normal pore pressure and pressure values. Based on the results of graph analysis, the pore pressure value shows the depth interval 3943.9 ft – 3949.1 ft pressure average 5.4 ppg, depth 4407.8 ft - 4417.6 ft pressure average 0.6 ppg, depth 4546.9 ft - 4554.8 ft pressure average 1.4 ppg, depth 4748.3 ft – 4753 ft pressure average 4.8 ppg and depth 5026.5 ft - 5033.7 ft pressure average 4.7 ppg where 5 zones experience subnormal pressure, so it can be concluded that the potential problems can occur lost circulation because the hydrostatic pressure of the mud is greater than the formation pressure which results in loss of drilling mud entering the formation.
IDENTIFIKASI KEBERADAAN BUNKER DENGAN METODE GEOLISTRIK TAHANAN JENIS KONFIGURASI WENNER ALPHA DAN DIPOLE-DIPOLE Adawiyah, Robiatul; Supriyanto, Supriyanto; Natalisanto, Adrianus Inu
GEOSAINS KUTAI BASIN Vol 1 No 2 (2018)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v1i2.287

Abstract

Bunker existence in Jembayan Village of Loa Kulu subdistrict, Kutai Kartanegara regency, was identified by using geoelectric method with configurations of Wenner Alpha and Dipole-Dipole. The bunker area was located at the zone of 50 UTM with UTM’s coordinate position, namely: UTM X 0502449 and UTM Y 9939205, consisting of 7 measurement points using 2 configuration, i.e.: Wenner Alpha configuration and Dipole-dipole configuration. The length of each measuring point is 72 m, using spaces between 1.5 m electrodes and the distance from each measuring point is 5 and 10 m. From the research results it was obtained the cross-section of inversion from Res2DINV which describes the existence of bunker. The cross-section of the inversion related to the resistivity ranging from 2.888 Ωm to 9.103 Ωm indicated the resistivity values of the underground bunker area. On the path of all measurement points (path A, B, C, D, E, F, G) there was an indication of bunker with different resistivity values.

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