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All Journal BERKALA FISIKA SAINS DAN MATEMATIKA YOUNGSTER PHYSICS JOURNAL
Hernowo Danusaputro
Departemen Fisika, Fakultas Sains Dan Matematika, Universitas Diponegoro, Semarang
Mathematics Physics

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DETERMINATION ROCK DENSITIES OF ULUBELU GEOTHERMAL LAMPUNG BY USING GRAVITY METHOD COMBINED WITH BOREHOLE METHOD Suharno, Suharno; Danusaputro, Hernowo
BERKALA FISIKA Vol 9, No 2 (2006): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

The Ulubelu geothermal system is located within Tanggamus volcanism. Rock densities were measured from wells Rendingan (Rd), Kukusan I (Kk1), Kukusan II (Kk2), Ulubelu II (UBL2) and Ulubelu III (UBL3). A terrain density estimate was made across line GG’ using the Nettleton method. The measured densities results, show values ranging between 2.60 x 103 kg m-3 and 2.70 x 103 kg m-3.  The density estimated profile is presented in Figure 2 shows the density of about 2.70 x 103 kg m-3. Combined with the results from the laboratory measurements of borehole samples and density estimated, those suggest as  the mean density of upper continental crust commonly used for the reduction of Bouguer anomalies (2.67 x 103 kg m-3).
Analisis Velocity Model Building Pada Pre Stack Depth Migration Untuk Penggambaran Struktur Bawah Permukaan Daerah ”x” Triarto, Yose Rizal; Danusaputro, Hernowo; Harmoko, Udi
BERKALA FISIKA Vol 13, No 1 (2010): Berkala Fisika
Publisher : BERKALA FISIKA

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Pre Stack Depth Migration method has been carried out for 2D seismic reflection data on Line KPH-11807 at “X” area. This method was chosen for reconstruction geology features and imaging the subsurface structure. Based on previous investigation which done October, 2004-January, 2005, Line KPH-11807 at “X” area was a potential development as hydrocarbon prospect area which complex geology structure and strong lateral velocity variations. In the same area has been done previously with Pre Stack Time Migration by Elnusa Geosains, PT. Therefore the result of the PSDM can be compared to PSTM method. Seismic section with complex geology structure and/or strong lateral velocity variations area, which often there are at seismic data migrated stack can be overcome using an accurate velocity model. Velocity model building with the IVMB (interval velocity model building) concept consist of the coherency inversion and global tomography yield the right subsurface geological model. Hereinafter the velocity model will be used for the PSDM (pre stack depth migration) process. Result of PSDM shows a significant image enhancement, able to assure the reflection pattern at the horizons with strong lateral velocity variations and give the more coherence resolution compared with Pre Stack Time Migration seismic data. This study is very valuable in building exploration concept and development of the area, especially in a complex structure with strong lateral velocity variations.   Keywords: PSDM, velocity model building.
PEMBUATAN SOFTWARE PENCATAT PENGUNJUNG PERPUSTAKAAN MENGGUNAKAN BARCODE DAN MYSQL BERBASIS BORLAND DELPHI 7.0 Apriana, Apriana; Danusaputro, Hernowo
BERKALA FISIKA Vol 12, No 4 (2009): Berkala Fisika
Publisher : BERKALA FISIKA

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The library visitors counter system using barcode and MySQL based with Borland Delphi 7.0 has been done for ease in counting the visitors in a library and data to be displayed more accurate and comprehensive. Bar code which printed on visitors card is aimed at barcode scanner to read the code of the identity of visitors who will enter the library. At Borland Delphi 7.0 uses the pascal programming language that is integrated with the input of barcode and database MySQL able to display the time visitors enter the library. From this research it was found that Borland Delphi 7.0 software can read the records in the MySQL database and display properly on a monitor in accordance with the data stored on the visitors database.   Keywords : library, barcode scanner, Borland Delphi 7.0, code barcode, MySQL
Uji Nilai Tahanan Jenis Polutan Air Laut Dengan Metode Ohmik Dan Geolistrik Tahanan Jenis Skala Laboratorium Dwi Indriana, Rina; Danusaputro, Hernowo
BERKALA FISIKA Vol 9, No 3 (2006): Berkala Fisika
Publisher : BERKALA FISIKA

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Geoelectric method and ohmic method used to investigate sea water intrution (salinity) in aquifer layer.Resistivity data aquisition for 3 layer model and 3 concentration of salinity was in laboratory scale. By comparing resistivity data before and after adding sea water we get resistivity value for each layer. The research result is decreasing of resistivity value for increasing salinity concentration.   
PEMBUATAN SOFTWARE MONITORING JUMLAH PRODUKSI KERUPUK MENGGUNAKAN BORLAND DELPHI 7.0 Adiyani C, Mirsari; Danusaputro, Hernowo
BERKALA FISIKA Vol 14, No 3 (2011): Berkala Fisika
Publisher : BERKALA FISIKA

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The monitoring program for the crackers counter has been done by Borland Delphi 7.0. The results of this program is intended to help the manager’s job in monitorin the amount ofcracker produced by industry. This program using Borland Delphi 7.0. While to find out the cracker pieces which fellfrom the conveyor using photodiodes sencors and lasers as light sources directed at the sensorphotodiodes. When the sencor detected a cracker pieces which fell from the conveyor, the sensorsend a signal to the microcontroller for processing and then send to computer via serialcommunication. On computer, that data is received by Borland Delphi 7.0 program to displayedand stored in Microsoft Access. The system has been realized successfully and can printer the data stored in databases sothat the amountof crackers produced will be known.Keyword: Crackers, Borland Delphi 7.0, Microsoft Access, photodiodes sencors, lasers
INVERSI MODEL BASED UNTUK GAMBARAN LITOLOGI BAWAH PERMUKAAN FR, Tabah; Danusaputro, Hernowo
JURNAL SAINS DAN MATEMATIKA Volume 18 Issue 3 Year 2010
Publisher : JURNAL SAINS DAN MATEMATIKA

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ABSTRACT-IncreosW of occuracy underground level imaging can be performed by using seismic inversion method. Apply inversion method to seismic data produce acoustic impedance value. Acoustic impedmce related directly with rock characteristic, so can be separating lithology. Based model irwersion built geologt model, then conelated with seismic data, upgrading iterative to get good suitable with seismic data. Result of based model funersioncan be able to produce result of inversion which is having same trend acoustic impedance with the original data seismic, thot also between syltthetic seismic and original seismic, so can be separating lithologt boundary conectly os vertical or continue as lateral.Key word: acoustic impedance, based model inversion, lithologyPermalink : http://ejournal.undip.ac.id/index.php/sm/article/view/2950
SISTEM MONITORING KEAMANAN KANDANG SAPI BERBASIS BORLAND DELPHI 7.0 Annisa, Nur; Danusaputro, Hernowo
JURNAL SAINS DAN MATEMATIKA Volume 18 Issue 4 Year 2010
Publisher : JURNAL SAINS DAN MATEMATIKA

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Abstract

ABSTRACT--A software for the cow shed security system has been made with Borland Delphi 7.0.This program can observe a cow shed security optimally.The cow shed security monitoring system is done byusing LDR (Light Dependent Resistor) censor. Borland Delphi 7.0 program will display the cow shed securitymonitoring result from a data which sent by a censor. Beside that, this software programming uses BorlandDelphi 7.0 which connecting to Microsoft Access 2007 as a data saving. From this software making which hasbeen done, we had the result that this system can monitoring the cow of shed by LDR (Light Dependent Resistor)censor. Testing result shows that if someone try to enter the cow shed area, automatically LDR (Light DependentResistor) censor will detects and showed software on PC or laptop. Beside that, we will hear the sound of alarmas early warning system.KeyWords: Cow shed, Borland Delphi7.0, database.
Speed Model Processing using Ray Tracing Method for 2D Depth Domain Migration (Pre Stack Depth Migration) on the field "AV" Evita, Anjar; Danusaputro, Hernowo
JURNAL SAINS DAN MATEMATIKA Volume 22 Issue 4 Year 2014
Publisher : JURNAL SAINS DAN MATEMATIKA

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Abstract

The research was conducted to process 2D seismic data by Pre Stack Depth Migration (PSDM) method on the field “AV”. The purpose of this study was to determine the appropriate interval velocity model to manage the PSDM methods work. Interval velocity model obtained from the initial estimate using coherency inversion velocity model is usually not convergent. Interval velocity model should be improved through several stages in order the estimated speed could be closer to the actual speed value. Some initial interval velocity model parameters should be improved to be more sensitive to lateral velocity variations for PSDM work. The method used to improve the velocity model was a horizon-based tomography using the ray tracing concept. These methods improved the layer speed and reflector geometry to produce a new interval velocity model. Model errors should be corrected by residual move out analysis. The best analysis obtained was from the fifth iteration to eliminate errors and flatten depth gathers. The proper value of the speed produced good quality images. The results of this research was PSDM Section or PSDM cross-section. PSDM cross-section has a good image quality to represent the geological structures in the earth's sub surface.
ANALISA PRESERVASI AMPLITUDO DAN RESOLUSI SEISMIK PADA DATA HASIL RECONVOLUTION LAPANGAN “X” CEKUNGAN SUMATERA TENGAH Agus Muhidin; Udi Harmoko; Hernowo Danusaputro; Moh. Irfan Saputra Haris
Youngster Physics Journal Vol 4, No 1 (2015): Youngster Physics Journal Januari 2015
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Structure interpretation of post-stack seismic data to delineate lithology boundary sometimes face difficulties in tracking reflector continuity, this is due to limitation of vertical resolution. Reconvolution method has been applied to fix vertical seismic resolution. In order to validate the function reconvolution to amplitude related interpretation, amplitude variation with offset (AVO) has applied to geology model.Reconvolution method was applied by increasing dominant frequency of seismic data and capable to minimize tuning thickness zone of geology model has been made. Modeling geology based on average of P velocity, S velocity, and density from field “X” well data and estimating P velocity, S velocity and density for fluid condition of reservoir. AVO analysis has been applied to validate how far reconvolution method capable to maintain amplitude behavior, AVO analysis using Zeoppritz equation in 10 to 30 degree angle and using intercept attribute (A), gradient (B) and product (A*B). Reconvolution method has used 50 Hz, 60 Hz, 65 Hz, and 70 Hz of wavelet.Reconvolution method capable to fix vertical seismic data resolution, it can be seen by decreasing of tuning thickness from 16 to 14 meters. Based on AVO analysis that be used for validate reconvolution method is showing intercept (A) and gradient (B) value be affected by fluids condition in reservoir and presence the random noise in the seismic data. Intercept (A) and gradient (B) for reconvolved data do not have significant changes. However, wavelet has used in reconvolution that possess the smallest error value is wavelet with dominant frequency in 60 Hz and 65 Hz. Keywords: Structure interpretation, Tuning thicknes, Recovolution, and AVO analysis
ANALISA INVERSI ACOUSTIC IMPEDANCE (AI) UNTUK KARAKTERISASI RESERVOIR KARBONAT PADA LAPANGAN “X” FORMASI PARIGI CEKUNGAN JAWA BARAT UTARA Luxy Rizal Fathoni; Udi Harmoko; Hernowo Danusaputro
Youngster Physics Journal Vol 4, No 2 (2015): Youngster Physics Journal April 2015
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Acoustic Impedance (AI) inversion method has been applied to describe characterization of carbonate reservoir in the field “X” North West Java Basin. The aim of this research is to determine the distribution of hydrocarbon prospect area that based on AI value and porosity value parameters. The used of Acoustic Impedance (AI) inversion methods is model based methods. The of model-based method is consist of geologic model construction then we compare to the real seismic data. Then by assume linear relationship between AI log and porosity log, and we have a linear equation that used to obtain the porosity distribution from AI distribution. Inversion result shows porous limestone distribution which has porosity range value about 0,21 – 0,23 fraction and acoustic impedance range value about 6800 – 8000 gr/cc.m/s with the directional distribution northwest – southeast. Keywords: Acoustic Impedance, Limestone, Porosity, Model-based method
Co-Authors Agus Muhidin Agus Muhidin Ali Djamhuri Anjar Evita Anjar Evita Apriana Apriana Dimas Pramudito Gian Antariksa Kusworo Adi Luxy Rizal Fathoni Mirsari Adiyani C Moh. Irfan Saputra Haris Mualimin Mualimin Muhammad Irham Nurwidiyanto Muhammad Isom Ashar Muhammad Mualimin Nur Annisa Prasetyo Abdi Retno Septiani Rina Dwi Indriana Rr. Tony Yulianto Saiful Widianto Sheyza Rery Dynza Anggary Siti Helmyati Tabah FR Tyas Vicri Hijria Udi Harmoko Yose Rizal Triarto