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All Journal Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan JGE (Jurnal Geofisika Eksplorasi) Jurnal Geosaintek Indonesian Physical Review Jurnal Teori dan Aplikasi Fisika JGISE-Journal of Geospatial Information Science and Engineering
Karyanto Karyanto
Jurusan Teknik Geofisika, Fakultas Teknik Universitas Lampung
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Earth & Planetary Sciences Education Engineering Materials Science & Nanotechnology Medicine & Pharmacology Physics Other

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ZONASI SITE EFFECT DAN ANALISIS BAHAYA PENGUATAN GEMPA MENGGUNAKAN METODE DSHA UNTUK MENENTUKAN PGA DI KABUPATEN SUMBA BARAT DAYA Soulthan Salahudin Al Ayubi; Karyanto Karyanto; Nandi Haerudin; Syamsurijal Rasimeng; Rahmat C Wibowo
Indonesian Physical Review Vol. 3 No. 2 (2020)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1549.687 KB) | DOI: 10.29303/ipr.v3i2.44

Abstract

Southwest Sumba Regency is located in the Banda Arc area. Its position which is very close to the subduction area in the south of Indonesia caused a lot of tectonic activity and earthquake hazard. The arrangement of alluvium, coral, and thick deposits on the island of Sumba makes it prone to earthquake strengthening. Zoning of soil characters using site effects and DSHA method was carried out to determine the danger level of strengthening the Southwest Sumba Regency. Zoning of the site effect soil character uses microtremor data which is correlated with seismic hazard analysis to obtain the PGA values on bedrock and ground surface using the closest earthquake source. The area is dominated by Class 2 and 3 lands (f0 worth 1.333 - 5 Hz) according to the Kanai Classification (1983), with an amplification predominance of 3.8-8.3 times. This indicates that the research area is dominated by thick sediment deposits. The PGA value obtained from the DSHA method is known that Southwest Sumba Regency has a PGA soil of 0.075-0.19 g and a bedrock PGA of 0.067-0.085 g using earthquake record data in Sumba Subduction and Timor Subduction. With PGA estimation, it is known that the level of earthquake disaster vulnerability is high, located in the south of Southwest Sumba Regency which is suspected to be composed of thick sediments and close to the Sumba Subduction and Timor Subduction.Keywords: Site effect, predominant frequency, amplification, earthquake, DSHA, PGA
Pengujian Prototipe Instrumen Pengukuran Gradien Termal di Lapangan Panas Bumi Padang Cermin Pesawaran Karyanto Karyanto; I Gede Boy Darmawan
Jurnal Teori dan Aplikasi Fisika Vol 9, No 2 (2021): Jurnal Teori dan Aplikasi Fisika
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v9i2.2775

Abstract

Hasil perancangan prototipe instrumen pengukuran gradien termal yang telah dilakukan sebelumnya membutuhkan pengujian lapangan. Pengujian ini bertujuan untuk melihat kemampuan instrumen prototipe dalam uji pengukuran langsung di lapangan panas bumi. Metode yang digunakan dalam pengujian adalah dengan membandingkan hasil pengukuran suhu pada instrumen prototipe dengan hasil pengukuran suhu menggunakan instrumen MAE A5000T penelitian sebelumnya di Padang Cermin. Penghitungan gradien termal dilakukan secara otomatis oleh sistem dalam prototipe menggunakan teknik kuadrat terkecil (Least Squares Method). Hasil pengukuran menunjukkan adanya keselarasan suhu khususnya pada area manifestasi. Peta sebaran suhu mengindikasikan pola klasterisasi yang menunjukkan hubungan aliran fluida panas, khususnya pada arah barat-timur. Adanya konektivitas fluida panas ini diinterpretasikan sebagai struktur geologi atau zona permeable pada area manifestasi. Hasil pengukuran gradien termal juga menunjukkan pola gradien tinggi di area manifestasi panas bumi. Selain itu, sebaran nilai suhu rendah pada ketiga layer juga mengindikasikan sumber aliran fluida air permukaan yang selaras dengan arah puncak gunung. Hal ini memperkuat indikasi bahwa sumber recharge atau resapan air meteorik didominasi oleh puncak Gunung Ratai. Temuan ini mengindikasikan bahwa prototipe instrumen pengukuran gradien termal ini mampu digunakan di lapangan panas bumi.
Peningkatan Partisipasi Masayarakat pada Studi Pemetaan Partisipatif dalam Pembuatan Jalur Evakuasi Bencana Tsunami di Desa Wisata Pagar Jaya Rahmat Catur Wibowo; Karyanto Karyanto; Ahmad Zaenudin; Muh Sarkowi
Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Vol 4 No 1 (2020)
Publisher : Lembaga Penelitian dan Pengabdian Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jss.v4i1.172

Abstract

Desa wisata Pagar Jaya memiliki beberapa obyek geowisata yang sangat menarik untuk dikunjungi seperti: Dinding Dasit, Pantai T. Indah, Pantai T. Hantu, dan Batu Wayang. Semua obyek geowisata tersebut berada di area pesisir dan sangat rentan terhadap ancaman bencana tsunami. Nilai penting dari proses partisipatif dalam kajian risiko bencana adalah mewadahi masyarakat dalam mengambil keputusan dan merumuskan tindakan prioritas pengurangan risiko bencana. Tujuan dari pengabdian ini adalah: memetakan kondisi eksisting obyek geowisata Dinding Dasit, Teluk Indah, Teluk Hantu, dan Batu Wayang berbasis geospasial, mengedukasi masyarakat akan prinsip-prinsip mitigasi bencana tsunami, dan mengintegrasikan data geospasial dan nonspasial dari kelompok masyarakat dalam pembuatan jalur evakuasi bencana tsunami di Desa Wisata Pagar Jaya. Kelompok masyarakat yang tergabung dalam Kelompok Sadar Wisata (Pokdarwis) Desa Wisata Pagar Jaya merupakan subjek utama dalam proses pemetaan partisipatif. Proses pemetaan melalui tahap Focus Group Discussion dan in-depth interview berkaitan dengan risiko bencana dan jalur evakuasi. Sistem Informasi Geografis kemudian mentransformasikan hasil pemetaan partsipatif dalam bentuk digital. Hasil dari penelitian ini adalah peta partisipatif jalur evakuasi untuk bencana tsunami di Desa Pagar Jaya yang secara geografis berada di pesisir selatan Pulau Sumatera.
INVERSI 2D DATA MAGNETOTELURIK UNTUK MENGETAHUI KEBERADAAN HIDROKARBON DAERAH BULA, MALUKU Elen Novia Limswipin; Syamsurijal Rasimeng; Karyanto Karyanto; Noor Muhammad Indragiri
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.v4i3.38

Abstract

There had been done a regional research which tittle is “2D inversion magnetotelluric data for understanding the hidrocarbon presence in Bula, Maluku”. This study aims to determine the resistivity distribution area of research based on data Magnetotelluric, identifying the presence of hydrocarbons based on the value of the resistivity of the results of 2D inversion of data Magnetotelluric. Methods of data processing done are (i) transform raw data from the time domain into the frequency domain, (ii) reduce noise by robust processing, (iii) process combine, (iv) Selection cross power, (v) inversion 1D and 2D. 2D inversion results is sectional subsurface resistivity distribution, layer having resistivity values 7-16 Ωm along MT1 and MT7 point at a depth of 1000 meters is a clay stone which is indicated as cap rock. Layer with resistivity values 34-120 Ωm, which is between the point MT6 and MT7 at a depth of 1500 meters is indicated as the sandstone reservoir. Based on geologic information and sectional 2D inversion seen their fault based on the resistivity contrast is between the point MT2 and MT3, MT3 and MT4 and MT6 and MT7.
PENDUGAAN PATAHAN DAERAH “Y” BERDASARKAN ANOMALI GAYABERAT DENGAN ANALISIS DERIVATIVE Yasrifa Fitri Aufia; Karyanto Karyanto; Rustadi Rustadi
Jurnal Geofisika Eksplorasi Vol 5, No 1 (2019)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v5i1.24

Abstract

The research area "Y" is an area of gold mineralization with low sulfidation epithermal type deposit. The existence of this type of mineralization on the path marked by the presence of mineral deposits, which form the quartz veined below the surface of the deposited within the structure of the fault. In this study, analysis of gravity data using derivatives analysis, i.e. First Horizontal Derivative (FHD) to determine the boundary fault structure and Second Vertical Derivative (SVD) to determine the type of fault. The existence of the fault structure integrated with subsurface modeling results in two-dimensional and three-dimensional. The results showed three line slice made in the area of research, identified structure of down faults (normal) trending northeast - south on slice 1 with an estimated dip (slope) is 22° and expected of strike on this fault is N 158° W and thrust fault structure trending northwest - south on slice 2 also slice 3 with an estimated dip (slope) is 22° and expected of strike on this fault is N 158° E. The results of the modeling of two-dimensional and three-dimensional show fracture structure is at the density of 2 g/cc – 2,67 g/cc in the depth of around 100 m - 250 m that consists of sedimentary rocks (clay and sandstone) with a density of 2,2 g/cc – 2,3 g/cc at the age of Tertiary Pliocene, tuff rock with a density of 2,4 g/cc – 2,5 g/cc at the age of Early Miocene and bedrock (basement) in andesite form with a density of 2,67 g/cc.
ANALISIS PETROFISIKA UNTUK MENENTUKAN OIL-WATER CONTACT PADA FORMASI TALANGAKAR, LAPANGAN “FBT”, CEKUNGAN SUMATRA SELATAN Febrina Bunga Tarigan; Ordas Dewanto; Karyanto Karyanto; Rahmat Catur Wibowo; Andika Widyasari
Jurnal Geofisika Eksplorasi Vol 5, No 1 (2019)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v5i1.20

Abstract

In conducting petrophysics analysis, there are many methods on each property. Therefore, it is necessary to determine the exact method on each petrophysical property suitable for application in the field of research in order to avoid irregularities at the time of interpretation. The petrophysical property consists of volume shale, porosity, water saturation, etc. This research used six well data named FBT01, FBT02, FBT03, FBT04, FBT05, and FBT06 and also assisted with core data contained in FBT03. Core data used as a reference in petrophysical analysis because it was considered to have represented or closed to the actual reservoir conditions in the field. The area in this research was in Talangakar Formation, "FBT" Field, South Sumatra Basin. The most suited volume shale method for “FBT” field condition was gamma ray-neutron-density method by seeing its photo core and lithology. As for the effective porosity, the most suited method for the field was neutron-density-sonic method by its core. Oil-water contact was useful to determine the hydrocarbon reserves. Oil-water contact was obtained at a depth of 2277.5 feet on FBT01, 2226.5 feet on FBT02, 2312.5 feet on FBT03, 2331 feet on FBT04, 2296 feet on FBT05, and 2283.5 feet on FBT06. The oil-water contact depth differences at Talangakar formation in FBT field caused by structure in subsurface.
ANALISIS PETROFISIKA DAN PENYEBAB LOW RESISTIVITY RESERVOIR ZONE BERDASARKAN DATA LOG, SEM, XRD DAN PETROGRAFI PADA LAPANGAN X SUMATERA SELATAN Rita Aprilia; Ordas Dewanto; Karyanto Karyanto; Aldis Ramadhan
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.v4i2.13

Abstract

Hydrocarbon reservoir zone located on Low Resistivity is a typical and hidden oil and gas layer which always wrong in assessing as a water layer due to the complex geological origin and resistivity log limitation in identifying hydrocarbon. Presence of shale in a reservoir will decreasing resistivity value and increasing saturation value, so it can cause the results of the analysis to be pessimistic in the identification of hydrocarbons. In that case need to do analysis to core data on research area in order to know the cause of Low Resistivity on reservoir zone that having a probability of hydrocarbon content. Reservoir zone that has low resistivity value is at depth 1572-1577 mD. In this zone, it has a low resistivity value around 2.7- 4.4 ohm-m, with water saturation value around 47%-74% which causes on Low Resistivity reservoir zone to be between hydrocarbons and water reservoir zone. Then, on this research, Low Resistivity is also caused by Lamination Clay of shale type presence which consists of several types of Clay which can cause reservoir zone is at low resistivity value. This Clay type consist of Kaolite 20%, Illite 4%, and Chlorite 4% minerals as well as the presence of other minerals as proponent of low resistivity that is Quartz 60%, Plagioclase 9% and Calcite 3% as conductive minerals.
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).
IDENTIFIKASI BATAS SUB-CEKUNGAN HIDROKARBON MENGGUNAKAN ANALISIS SHD (SECOND HORIZONTAL DERIVATIVE) DAN SVD (SECOND VERTICAL DERIVATIVE) BERDASARKAN KORELASI DATA GAYABERAT DAN SEISMIK Wuri Andari; Karyanto Karyanto; Riski Kurniawan
Jurnal Geofisika Eksplorasi Vol 5, No 1 (2019)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v5i1.23

Abstract

Gravity method generally can read the difference of rock density to identify subsurface structures. This research was conducted in Riau area with the aim of knowing fault and subsurface structure, and determining sub-basin boundary. Data processing was done by using spectral analysis, SHD and SVD analysis, and 2D modeling then later correlated with seismic section to find out the subsurface structure of research area. The results showed that the bouguer anomaly value had a range of values between 5.6 mGal to 33.2 mGal with a surface density of 1.95 g / cc. High anomaly were in the eastern region and low anomaly were in the NW - SE trending region. 6 low anomalies indicated as a sub-basin pattern were separated by a relatively high altitude area of North West Southeast. The average residual anomaly depth was about 2.3 km. Based on the 2D subsurface modeling results, there was layer structure from the youngest to eldest that were alluvial deposits, Petani Formation, Sihapas group and granitic rock as the base rock. The projected subsurface section to surface showed 5 sub-basins with basin width 4-12 km located in the sub-basin and fault indication area.
IDENTIFIKASI STRUKTUR BAWAH PERMUKAAN MENGGUNAKAN METODE MAGNETOTELLURIK 2D DI DAERAH CEKUNGAN BINTUNI SEBAGAI POTENSI HIDROKARBON Ririn Yulianti; Syamsurijal Rasimeng; Karyanto Karyanto; Hidayat Hidayat; Noor Muhammad Indragiri
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.v4i2.18

Abstract

Magnetotelluric research was done in hydrocarbon prospect area of Bintuni basin, West Papua province. The purpose of this research is to identificate hydrocarbon prospect in subsurface structure using 2D resistivity section. Data processing step for the research are; (i) Data transformation from time domain to frequency domain using Fourier transformation. (ii) Filtering process using Robust No Weight, Robust Rho Variance and Robust Ordinary Coherency. (iii) XPR selection and formatting data into EDI file. (iv) 2D resistivity section modeling using inversion. The result of this research based on 2D resistivity section in Klasafat formation have resistivity value about 1 – 20 Ωm. From 0 until 1000 meter below the surface the main lithology is claystone that identified as caprock. Kemblengan formation have resistivity value about 20 – 90 Ωm in 3500 meter under surface with main lithology lime-sandstone and identified as a reservoir. Tipuma formation have resistivity value about 0.62 – 2 Ωm in 8000 meter under surface with main lithology claystone. Kemun formation have resistivity value about 20 – 32 Ωm in 6000 meter under surface with main lithology sandstone and identified as a basement.
Co-Authors Ade Yogi Agung Setiadi Ahmad Amiruddin Ahmad Zaenudin Aldis Ramadhan Andika Widyasari Ayu Yuliani Bagus Sapto Mulyanto Bagus Sapto Mulyatno Egi Ramdhani Elen Novia Limswipin Febrina Bunga Tarigan Hidayat Hidayat Hilman Sabiq I Gede Boy Darmawan Mhd Azri Pangaribuan Muh Sarkowi Muhammad Fikri Azhari Muhammad Nurul Nanang Yulianto Nandi Haerudin Nasyratul Ilmi Noor Muhammad Indragiri Ordas Dewanto Pipit Melinda Meitawati Rahmat C Wibowo Rahmat Catur Wibowo Ravide Lubis Ririn Yulianti Riski Kurniawan Rita Aprilia Rudianto Rudianto Rustadi ., Rustadi Ryan Donovan Soulthan Salahudin Al Ayubi Syamsurijal Rasimeng Syamsurijal Rasimeng Syamsurijal Rasimeng Ulfa Wahyuningsih Winda Styani Yuliawati Winona Putri Prihadita Wuri Andari Yasrifa Fitri Aufia Zelica Krismalia Manurung