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All Journal Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan JGE (Jurnal Geofisika Eksplorasi) Jurnal Geosaintek JOURNAL ONLINE OF PHYSICS Indonesian Physical Review Jurnal Geosains dan Remote Sensing (JGRS) Unri Conference Series: Community Engagement Jurnal Riset Fisika Indonesia Prosiding Seminar Nasional Hasil Penelitian Sains, Teknik dan Aplikasi Industri Fakultas Teknik Universitas Lampung Journal of Public Health Concerns Jurnal Teknik dan Teknologi Indonesia Jurnal Geosaintek Nemui Nyimah
Bagus Sapto Mulyatno
Universitas Lampung
Agriculture, Biological Sciences & Forestry Humanities Astronomy Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Medicine & Pharmacology Nursing Physics Public Health Other

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OPTIMALISASI PENCITRAAN STRUKTUR BAWAH PERMUKAAN MENGGUNAKAN METODE KIRCHHOFF PRE-STACK TIME MIGRATION PADA DATA SEISMIK LAUT WETAR Syamsurijal Rasimeng; Amelia Isti Ekarena; Bagus Sapto Mulyanto; Subarsyah Subarsyah; Andrian Wilyan Djaja
JGE (Jurnal Geofisika Eksplorasi) Vol 6, No 2 (2020)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v6i2.67

Abstract

Migration is one of the stages in seismic data processing aimed at returning the diffraction effect to the actual reflector point. The processing of a seismic data is adjusted to the existing problems in the data itself, so the accuracy in using the migration technique and determination of data processing parameters greatly affects the resulting seismic cross-section. Kirchhoff Pre-Stack Time Migration is one of the most used migration methods in seismic data processing because it shows better results than conventional stacking methods. The parameters that need to be noticed in the Kirchhoff migration are the migration aperture values. Based on this, variations of migration aperture values used are 75 m, 200 m and 512.5 m. The 512.5-m aperture migration value shows the best seismic cross-section results. This is evidenced by the capability in eliminating bowtie effects around CDP 600 up to CDP 800, eliminating diffraction effects around CDP 3900 to CDP 4050, and showing a seismic cross-section with better lateral resolution compared to the migration value of the aperture of 75 m and 200 m. Based on the seismic cross-section of migration results, the geological structure that can be identified is a fault that found in some CDP.
ANALISIS DEFORMASI PERMUKAAN MENGGUNAKAN METODE DInSAR (Differential Interferometry Synthetic Aperture Radar) PADA STUDI KASUS GEMPABUMI LOMBOK PERIODE AGUSTUS 2018 Muhammad Fikri Azhari; Karyanto Karyanto; Syamsurijal Rasimeng; Bagus Sapto Mulyanto
Jurnal Geofisika Eksplorasi Vol 6, No 2 (2020)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v6i2.68

Abstract

Lombok is located on the boundary of active tectonic plates, this is what caused the Lombok Earthquake on August, 2018. DInSAR is a remote sensing technology that utilizes radar satellites to measure the amount of deformation on the surface of the ground with sub-centimeter accuracy. This study aims to obtain the value of surface deformation after the earthquake that struck the Lombok region, in August 5, 2018 Earthquake and the August 19 2018 Earthquake and analyze impact and charateristics of the deformation that occurred in the two earthquakes. The research was carried out based on SAR Sentinel-1 image processing using SNAP Software, Google Earth and ArcGIS 10.3. Deformation that occurred after the Lombok earthquake on August 5, 2018 caused an increase in land level (uplift) on the coast of North Lombok with a deformation value of 15-30 cm to the Line of Sight (LOS). Whereas deformation in the form of subsidence occurs in the City of Mataram and West Lombok with a value of -6 to -16 cm to the Line of Sight (LOS). While the deformation that occurred after the Lombok earthquake on August 19, 2018, caused an increase in land level (uplift) on the East Lombok coast with a deformation value of 18 to 31 cm to the Line of Sight (LOS). Whereas deformation in the form of subsidence occurs in Central Lombok with a value of -3 to -17 cm to the Line of Sight (LOS).
INVERSI MIKROTREMOR UNTUK PROFILING KECEPATAN GELOMBANG GESER (Vs) DAN MIKOROZONASI KABUPATEN BANDUNG Andina Zuhaera; Suharno Suharno; Bagus Sapto Mulyatno
Jurnal Geofisika Eksplorasi Vol 5, No 2 (2019)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v5i2.25

Abstract

Bandung Regency is a highland area with a slope between 0 - 8%, 8-15% to above 45%. The district is located at an altitude of 768 m above sea level with the northern region higher than the south. The purpose of this study was to determine the distribution of Vs30 waves and determine the impact of damage due to wave amplification (amplification). To minimize the impact of this earthquake identification can be done including a survey to map soil characteristics in response to earthquake shocks using the seismic Horizontal to Vertical Spectral Ratio (HVSR) method. Based on the results of the study, the distribution of the dominant frequency values, Bandung Regency was identified as having hard and soft rock soil and having solid clay with a thickness of tens of meters. The amplification value in Bandung Regency has a value (0 Ao 6) which can be categorized that Bandung Regency has a small impact on the earthquake. The difference between the results of inversion processing and HVSR is due to the assumption that the layer inversion is heterogeneous and the HVSR layer is homogeneous.
KLASIFIKASI PETROFISIKA TIPE BATUAN UNTUK MEMPREDIKSI KUALITAS RESERVOAR PASIR SERPIHAN PADA FORMASI TALANG AKAR, CEKUNGAN ONWJ Feni Priyanka; Bagus Sapto Mulyatno; Riezal Ariffiandhany
Jurnal Geofisika Eksplorasi Vol 4, No 3 (2018)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v4i3.39

Abstract

Hydrocarbons were accumulated in reservoir, the reservoir has a lot of types depending on the geological conditions and the constituent mineral. In ONWJ basins, sub-basins Arjuna, Talang Akar Formation is sand splintersreservoir type. The presence of clay in a reservoir will reduce the resistivity and increase thesaturation, so it takes a multimineral analysis and the reservoir qualityclassification. In this study, physical properties (porosity, permeability, Rw, and saturation) and the quality of the reservoir can be identified through petrophysical analysis by utilizing log data and core analysis, and the rocktypeprediction(using R35 Winland or HFU method). In this study 5 wells (IX-A1, IX-13, IX-4, IX-7 and IX-8)used and found eight hydrocarbon zones, 6 are validated by the DST (drill steam test)data, androck type method that suitable is the method of HFU (hydraulic flow units) due to the coefficient of correlation between porosity and permeability shows a value of 0.75, based on the calculations, the eight types of rock is conclude, where the dominance of the rock typeis the type 12 with a pore size between 5-10 microns, type reservoir rocks in this study belong to the lithofacies distributary channel and mouthbar sand. By knowing the petrophysical property values, it can determine reservoir productivity and determine the zone eligible to be produced or not, by using curve SMLP (Stratigraphic Modified Lorenz Plot).
PERBANDINGAN NILAI PERCEPATAN TANAH MAKSIMUM BERDASARKAN MODIFIKASI KONSTANTA ATENUASI DAN DATA ACCELEROGRAPH TAHUN 2008-2016 PADA STASIUN BMKG LAMPUNG Pipit Melinda Meitawati; Bagus Sapto Mulyatno; Karyanto Karyanto; Agung Setiadi
Jurnal Geofisika Eksplorasi Vol 4, No 2 (2018)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v4i2.17

Abstract

Peak ground acceleration is one of the parameters used in estimating the extent of breakdown caused by earthquake shocks. In the present study, the determination of an attenuation empirical formula PGA (Peak Ground Acceleration) based on the attenuation equation Lin and Wu (2010). Data used in the study of seismic event data by period year 2008-2012. Through the calculation of regression analysis, then obtained the function attenuation of peak ground acceleration in Lampung region at each station accelerograph.At the LWLI accelerograph station obtained the value of the empirical coefficient of the distance of earthquake -2.351, the empirical coefficient of earthquake magnitude 0,574, and the constant 2,430. At the KASI accelerograph station obtained the value of the empirical coefficient of the distance of earthquake -2.522, the empirical coefficient of earthquake magnitude 0.654, and the constant 2.182. At the BLSI accelerograph station obtained the value of the empirical coefficient from the distance of earthquake -3.224, the empirical coefficient of earthquake magnitude 0.651, and constant 4,092. At the KLI accelerograph station obtained the value of the empirical coefficient from the distance of earthquake -2.746, the empirical coefficient of earthquake magnitude 0.751, and the constant 2.053.Result of correlation test verification, chart relation between distance and magnitude earthquakes, ratio PGA contour maps, as well as a ratio between the value of PGA models with the observation of accelerograph year 2013-2016 show that the acceleration attenuation function of the obtained soil is relatively good. Based on PGA attenuation contour map model at an event the earthquake on 28th May 2011, PGA great value be found in the Liwa region with a PGA score of 10-20 gal and its seismic intensity value is V-VI MMI. It happens because of the source the earthquake is in the western sea of Liwa.
ESTIMASI KANDUNGAN SERPIH (Vsh), POROSITAS EFEKTIF (∅e) DAN SATURASI AIR (Sw) UNTUK MENGHITUNG CADANGAN HIDROKARBON PADA RESERVOAR LIMESTONE LAPANGAN “PRB” DI SUMATERA SELATAN MENGGUNAKAN DATA LOG DAN PETROFISIKA Leo Rivandi Purba; Bagus Sapto Mulyatno
Jurnal Geofisika Eksplorasi Vol 4, No 3 (2018)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v4i3.43

Abstract

Log and petrophysics data of research area are that located in South Sumatera Basin, exactly at formation Baturaja will be used for counting the hydrocarbon stock in research field. There are 3 the well datas prosessed to determine the prospect layer of hydrocarbon and estimate the hydrocarbon stock in the productive zone by using 1 petrophysic data from well PRB-3. In order to determine the productive zone of hydrocarbon, the first thing to do is to determine the petrophysics parameters. Parameters used is shale content, effective porosity and water saturation. The value of shale content on “PRB” field shows that reservoir is clean from shale minerals. But, based on the saturation of water, type hydrocarbon in reservoir it is natural gas. Based value of three parameters last, the field “PRB” having 6 zone productive hydrocarbon in each ecploratory wells.  Then, determine zone net pay that had been determined by using the cut-off of shale content which is 8% it means hydrocarbon will be produced if the value of shale content under 8%, effective porosity is 5% it means hydrocarbon will be produced if the value of porosity of effective larger than 5% and water saturation is 70% it means that the value of water saturation on field “PRB” must be less than 70% that hydrocarbon can be produced. Average thickness of the net pay in well PRB-1 is 6.78 meter. In well PRB-2, the average thickness is 7.37 meter while in well PRB-3 it is 3,825 meter. The average thickness from those three wells is 3,005 meter. The mean effective porosity of those 3 wells is 8,1% and the mean water saturation is 27,2%. Gas volume formation factor (Bg) is 0,0226 bbl/SCF which the area width is 28 km2. Natural gas stock (OGIP) in this research area is 7,764 BSCF.
OPTIMALISASI DAN ANALISIS DESAIN PARAMETER SEISMIK 3D DARAT BERDASARKAN MODEL GEOLOGI LAPANGAN “RL” Ravide Lubis; Bagus Sapto Mulyatno; Karyanto Karyanto
Jurnal Geofisika Eksplorasi Vol 4, No 2 (2018)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v4i2.12

Abstract

The design of 3D land seismic parameters is a preliminary step before the acquisition of 3D land seismic data to obtain seismic data quality and efficient survey budget. The objective of this research is to obtain high quality of 3D land seismic data based on fold coverage spread on each target layer. The method used is based on the principle of wave propagation or ray tracing method on each target layer, wherein each wave reflection point (bin) will have a different value of fold so that the required configuration of the stretch that will result in the optimal spread of the fold. The applied stretch configurations are orthogonal, brick, zig-zag and slanted where each stretch configuration uses two types of templates that is narrow and wide azimuth. From the simulation analysis results of several stretch configurations in the survey area, then the optimal stretch configuration will be obtained in the survey area. The stretch configuration will be applied is the configuration of orthogonal stretch with narrow azimuth type template. Consideration of the selection of this stretch configuration because it has a more evenly folding effect on the target layer than with other stretch configurations. Furthermore, to obtain the configuration of the appropriate stretch of field conditions, the source point is moved outside the obstacle zone so that the quality of seismic data is maintained.
Edukasi Fenomena Geologi Gua Warak dan Gua Macan Putih untuk Pengembangan Potensi Geowisata di Kota Metro Ilham Dani; Bagus Sapto Mulyatno; Ordas Dewanto; I Gede Boy Darmawan
Unri Conference Series: Community Engagement Vol 3 (2021): Seminar Nasional Pemberdayaan Masyarakat
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/unricsce.3.423-428

Abstract

The condition of the Covid-19 pandemic that has occurred since the beginning of 2020 has paralyzed tourism activities in Metro City, Lampung Province. One of the affected tourist objects is the Warak Cave and the Macan Putih Cave, which are located in Tejosari Village, East Metro District. The development of tourist attractions which began to squirm since 2018 was paralyzed due to the outbreak. Entering the new normal era, it can be used as a momentum to introduce the concept of geotourism in Tejosari Village so that the development of tourist objects becomes more attractive in attracting tourists. The method used in this service activity is by direct observation in the field regarding geological conditions which are then disseminated to the community around the cave and to the managers of tourist attractions. The effort made by the service team is to provide counseling about the concept of geotourism and the efforts that can be made to optimize the tourism potential around the cave. The results obtained from this activity are an increase in public knowledge about geological conditions and the concept of geotourism.
Karakterisasi reservoar dan sumur usulan menggunakan metode seismik inversi acoustic impedance dan multiatribut seismik pada lapangan poseidon, australia Rafi Rilo Pambudi; Bagus Sapto Mulyatno; Muh Sarkowi; Egi Ramdhani; Ordas Dewanto; Rahmat Catur Wibowo
Prosiding Seminar Nasional Ilmu Teknik Dan Aplikasi Industri Fakultas Teknik Universitas Lampung Vol. 4 (2021)
Publisher : Fakultas Teknik Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (941.808 KB) | DOI: 10.23960/prosidingsinta.v4i.36

Abstract

Dalam tahap pengembangan lapangan migas dengan mengintegrasikan antara metode seismik inversi acoustic impedance dan analisis multiatribut akan menghasilkan interpretasi data untuk karakterisasi reservoar yang lebih akurat. Penelitian ini dilakukan untuk memperoleh informasi sifat fisis reservoar dari time structure map, volume impedansi akustik, dan volume densitas dari analisis multiatribut yang dilakukan pada lapangan Poseidon cekungan Browse. Kemudian mengkorelasikannya sehingga diketahui zona prospek hidrokarbon. Zona reservoar yang mengindikasikan prospek gas berada pada bagian utara dan timur laut memiliki rentang nilai impedansi akustik rendah antara 28.480 ft/s*g/cc – 35.831 ft/s*g/cc atau 8.680,7 m/s*gr/cc – 10.921,3 m/s*gr/cc, daerah antiklin dengan ketinggian 4909 m – 5008 m, dan densitas yang rendah dengan nilai 2,40 g/cc – 2,51 g/cc. Sumur usulan untuk development area yaitu sumur Rafi 1 terletak pada inline 32245 dan xline 2627 dengan rekomendasi pengeboran pada kedalaman 4909 m hingga 5090 m dan sumur Rilo 1 yang terletak pada inline 3290 dan xline 1880 dengan rekomendasi pengeboran pada kedalaman 5003 m hingga 5086 m.
IDENTIFIKASI STRUKTUR PATAHAN DAN LOKASI RESERVOAR PANASBUMI DAERAH GUNUNG CIREMAI BERDASARKAN ANALISIS DATA GRAVITY Irma Nurliza Lumbantoruan; Muhammad Sarkowi; Bagus Sapto Mulyatno; Rahmat Catur Wibowo
Jurnal Geosaintek Vol 9, No 2 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25023659.v9i2.17131

Abstract

Penelitian pada Lapangan Panasbumi Gunung Ciremai, Provinsi Jawa Barat, bertujuan untuk memperoleh peta anomali Bouguer berdasarkan analisis data gravity GGMPlus. Kemudian pemisahan anomali regional dan residual dengan menggunakan filter moving average. Selanjutnya dilakukan analisis Second Vertical Derivative (SVD) untuk menganalisis patahan, dan pemodelan 3D untuk menggambarkan secara jelas penampang bawah permukaan dan melihat sebaran densitas bawah permukaan. Dari hasil pengolahan diperoleh densitas anomali Bouguer sebesar 22-50 mGal dengan densitas rata-rata 2,314 g/cc. Dari hasil analisis spektrum diperoleh kedalaman rata-rata anomali regional 4250 meter dan untuk kedalaman rata-rata residual 350 meter. Nilai nol pada analisis SVD menunjukkan batas karakteristik geologi yaitu adanya sesar dan perbedaan fisis dari densitas tinggi ke rendah pada densitas batuan. Struktur sesar yang teridentifikasi merupakan sesar mendatar yang berarah hampir NW-SE yang membedah Ciremai Muda produk vulkanik. Terdapat juga sesar berarah barat-timur sebagai kelurusan lama kaldera Ciremai yang menghasilkan prospek panasbumi Sangkanhurip dan Pejambon di bagian timur Gunung Ciremai. Berdasarkan peta geologi dapat dilihat bahwa struktur geologi Gunung Ciremai merupakan sesar aktif Cilacap-Kuningan yang berperan sebagai jalur manifestasi panasbumi Ciniru. Dari hasil pemodelan 3D ditemukan zona reservoir pada kedalaman 3-4 km dengan nilai densitas 2,2-2,3 g/cc dan zona heat source pada kedalaman 4-5 km dengan nilai densitas 2,6-2,7 g/cc dan untuk zona caprock pada kedalaman 1,5-3 km dengan nilai densitas 2,7-2,8 g/cc.
Co-Authors Agung Setiadi Amelia Isti Ekarena Andina Zuhaera Andrian Wilyan Djaja Dani, Ilham Dyah Wulan Sumekar Rengganis Wardani Egi Ramdhani Endro Prasetyo Wahono Erfani, Sandi Feni Priyanka Ferucha, Istifani Ghiffary, Aviv Irfan Wildan Hesti Hesti Hidayatika, Akroma I Gede Boy Darmawan Ilham Dani Imam Setiadi, Imam Irma Nurliza Lumbantoruan Isti Nur Kumalasari Karyanto, Karyanto Kumalasari, Isti Nur Kuncoro, Kirana Helga Aimee Leo Rivandi Purba Lumbantoruan, Irma Nurliza Muh Sarkowi Muhammad Fikri Azhari Muhammad Sarkowi Muhammad Sarkowi Mulyasari, Rahmi Nanda Hanyfa Maulida Nandi Haerudin Ordas Dewanto Pipit Melinda Meitawati Rafi Rilo Pambudi Rahmi Mulyasari RahmiMulyasari, Rahmi Ravide Lubis Riezal Ariffiandhany Sarkowi, Muhammad Solihin, Hafiz Ibnu Subarsyah Subarsyah Suharno Suharno Suharso Suharso Syamsurijal Rasimeng Titin Yulianti Wibisono, Ambrosius Hernawan Wibowo, Rahmat Catur Zulkaromi, Muhammad