Kamtono Kamtono
Research Centre For Geotechnology - LIPI Kompleks LIPI, Jln. Sangkuriang Bandung

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Extensional Tectonic Regime of Garut Basin based on Magnetotelluric Analysis Handayani, Lina; Kamtono, Kamtono; Wardhana, D. D.
Indonesian Journal on Geoscience Vol 8, No 3 (2013)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (854.834 KB) | DOI: 10.17014/ijog.v8i3.162

Abstract

DOI: 10.17014/ijog.v8i3.162Garut Basin are is part of Bandung-Garut Greater Basin (Bandung Zone) characterized by a large basin surrounded by mountain ranges. Active volcanoes had distributed their material as pyroclastic deposits around the outer border of the zone and as lava flow deposit separating the two basins. Bouguer gravity anomaly data had also indicated the presence of several low anomaly closures at about the area of Bandung and Garut Basins that were surrounded by high gravity anomaly zones. Two magnetotelluric surveys were completed to acquire the subsurface model that might explain the tectonic evolution of studied area. The first stage was characterized sby the presence of horst - graben structures that might imply an extensional regime of the area. The next stage of evolutionwas indicated by the horizontal layering correlated to the relative non-active tectonic. In addition, a most recent structure that appeared near the surface might suggest a possible extension force as the current stage.
Karakteristik Batuan Sumber (Source Rock) Hidrokarbon pada Formasi Batuasih di daerah Sukabumi, Jawa Barat Praptisih, Praptisih; Kamtono, Kamtono; Putra, P. S.; Hendrizan, M.
Indonesian Journal on Geoscience Vol 4, No 3 (2009)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (812.796 KB) | DOI: 10.17014/ijog.v4i3.78

Abstract

http://dx.doi.org/10.17014/ijog.vol4no3.20092The purpose of the study carried out on the claystone of Batuasih Formation in Sukabumi area is to find out the hidrocarbon potential and its characteristics. The Batuasih Formation, overlying conform- ably the Walat Formation, consists  of claystone, dark gray, shaly, brittle, containing clay ball, calcite veins, with carbonate intercalations. The geochemical analysis conducted on twelve samples shows the TOC values vary between 0.49 – 1.14 % and Tmax of 431 – 434o C. Four samples are categorized to be immature, while the rests are mature. HI values of the Batuasih Formation varying from 77-191 mg HC/ TOC indicate that the samples are of C and CD organic facies. Based on those analyses, the source rock is favourably potential to generate a small quantity of hydrocarbon and gas. The hydrocarbon source rock potential level in the investigation area shows a poor to fair organic richness, and its kerogen is included into types II and III. The source rock quality based on the Hydrogen Index (HI) value tends to be a gas prone. 
Nose Structure Delineation of Bouguer Anomaly as the Interpretation Basis of Probable Hydrocarbon Traps: A Case Study on the Mainland Area of Northwest Java Basin Kamtono, Kamtono; Wardhana, D. D.
Indonesian Journal on Geoscience Vol 7, No 3 (2012)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1887.421 KB) | DOI: 10.17014/ijog.7.3.157-166

Abstract

DOI: 10.17014/ijog.v7i3.144Two important aspects in the exploration of oil and gas are technology and exploration concepts, but the use of technology is not always suitable for areas with geological conditions covered by young volcanic sediments or limestone. The land of the Northwest Java Basin is mostly covered by young volcanic products, so exploration using seismic methods will produce less clear image resolution. To identify and interpret the subsurface structure and the possibility of hydrocarbon trap, gravity measurements have been carried out. Delineation of nose structures of a Bouguer anomaly map was used to interpret the probability of hydrocarbon traps. The result of the study shows that the gravity anomalies could be categorized into three groups : low anomaly (< 34 mgal), middle anomaly (34 - 50 mgal), and high anomaly (> 50 mgal). The analysis of Bouguer anomaly indicates that the low anomaly is concentrated in Cibarusa area as a southern part of Ciputat Subbasin, and in Cikampek area. The result of delineation of the Bouguer anomaly map shows the nose structures existing on Cibinong-Cileungsi and Pangkalan-Bekasi Highs, while delineation of residual anomaly map shows the nose structures occurs on Cilamaya-Karawang high. Locally, the gas fields of Jatirangon and Cicauh areas exist on the flank of the nose structure of Pangkalan-Bekasi High, while the oil/gas field of Northern Cilamaya is situated on the flank of the nose structure of Cilamaya-Karawang High. The concept of fluid/gas migration concentrated on nose structures which are delineated from gravity data can be applied in the studied area. This concept needs to be tested in other oil and gas field areas.
Turbidite Facies of the Halang Formation in Ajibarang Area, Central Java Praptisih, Praptisih; Kamtono, Kamtono
Indonesian Journal on Geoscience Vol 6, No 1 (2011)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2265.866 KB) | DOI: 10.17014/ijog.v6i1.112

Abstract

DOI: 10.17014/ijog.v6i1.112An understanding of deepwater turbidite sediments is very important mainly dealing with the determination of a reservoir geometry. The problem arising in the turbidite sediment geometry is very complex and varied, and its existence depends on how, when, and type of its environment. In Central Java, the broad turbidite sediment distribution of the Halang Formation is needed to be observed its facies association. This paper will discuss the turbidite facies of Halang Formation in the Ajibarang area. The method used to analyze the turbidite facies is by measuring stratigraphic sections and observing the lithofacies characteristics to reconstruct its depositional environment. The Halang Formation outcrop in the Ajibarang area is dominantly composed of alternating sandstone and claystone or marl. Based on the observation, the turbidite facies of Halang Formation, in the Ajibarang area, was deposited on a submarine fan system at the middle fan of suprafan lobes. Compiling with the previous studies, the source of the Halang Formation is indicated to be derived from the south southwest.
Nose Structure Delineation of Bouguer Anomaly as the Interpretation Basis of Probable Hydrocarbon Traps: A Case Study on the Mainland Area of Northwest Java Basin Kamtono, Kamtono; Wardhana, D. D.
Indonesian Journal on Geoscience Vol 7, No 3 (2012)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1887.421 KB) | DOI: 10.17014/ijog.v7i3.144

Abstract

DOI: 10.17014/ijog.v7i3.144Two important aspects in the exploration of oil and gas are technology and exploration concepts, but the use of technology is not always suitable for areas with geological conditions covered by young volcanic sediments or limestone. The land of the Northwest Java Basin is mostly covered by young volcanic products, so exploration using seismic methods will produce less clear image resolution. To identify and interpret the subsurface structure and the possibility of hydrocarbon trap, gravity measurements have been carried out. Delineation of nose structures of a Bouguer anomaly map was used to interpret the probability of hydrocarbon traps. The result of the study shows that the gravity anomalies could be categorized into three groups : low anomaly (< 34 mgal), middle anomaly (34 - 50 mgal), and high anomaly (> 50 mgal). The analysis of Bouguer anomaly indicates that the low anomaly is concentrated in Cibarusa area as a southern part of Ciputat Subbasin, and in Cikampek area. The result of delineation of the Bouguer anomaly map shows the nose structures existing on Cibinong-Cileungsi and Pangkalan-Bekasi Highs, while delineation of residual anomaly map shows the nose structures occurs on Cilamaya-Karawang high. Locally, the gas fields of Jatirangon and Cicauh areas exist on the flank of the nose structure of Pangkalan-Bekasi High, while the oil/gas field of Northern Cilamaya is situated on the flank of the nose structure of Cilamaya-Karawang High. The concept of fluid/gas migration concentrated on nose structures which are delineated from gravity data can be applied in the studied area. This concept needs to be tested in other oil and gas field areas.
FASIES DAN LINGKUNGAN PENGENDAPAN BATUAN KARBONAT FORMASI PARIGI DI DAERAH PALIMANAN, CIREBON Praptisih, Praptisih; Siregar, M. Safei; Kamtono, Kamtono; Hendrizan, Marfasran; Putra, Purna Sulastya
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 22, No 1 (2012)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2595.097 KB) | DOI: 10.14203/risetgeotam2012.v22.56

Abstract

ABSTRAK Batuan karbonat Formasi Parigi tersingkap baik di Komplek Kromong daerah Palimanan, Cirebon dimana studi fasies karbonat ini dilakukan.  Berdasarkan karakter fisik dan biota yang dikandungnya, batuan karbonat Komplek Kromong dapat dikelompokkan menjadi  7 fasies, yakni : (1) fasies boundstone, (2) fasies rudstone, (3) fasies cross bedded grainstone, (4) fasies foraminiferal packstone, (5) fasies algal-foram packstone,  (6) fasies floatstone, dan (7) fasies thin bedded wackestone-packstone. Fasies boundstone dapat dibagi menjadi 2 subfasies yaitu subfasies bafflestone dan subfasies framestone. Lingkungan pengendapan Formasi Parigi diperkirakan  diendapkan pada lingkungan reef front, reef crest, back reef, lagoon-surge chanel dan tidal flat-tidal chanel. Hasil analisis  fosil foraminifera besar menunjukkan  umur Formasi Parigi adalah Miosen Awal. Berdasarkan pada  pola lingkungan pengendapan Formasi Parigi diinterpretasikan terumbu bagian depan berada di sebelah timur laut, sedangkan terumbu bagian belakang di bagian baratdaya.
STRATIGRAFI DAN SEDIMENTASI ENDAPAN KUARTER DAERAH PURING DAN SEKITARNYA. GOMBONG SELATAN Praptisih, Praptisih; Kamtono, Kamtono
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 16, No 2 (2006)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (735.608 KB) | DOI: 10.14203/risetgeotam2006.v16.179

Abstract

Penelitian lapangan dan laboratorium telah dilakukan untuk mempelajari stratigrafi dan sedimentasi endapan Kuarter di daerah Puring, Gombong Selatan. Penelitian lapangan dilakukan dengan pemboran inti, sedangkan laboratorium terdiri dari paleontologi dan granulometri.Hasil analisa stratigrafi menunjukkan bahwa sedimen Kuarter diendapkan diatas endapan Tersier Formasi Halang yang dapat dibedakan menjadi 4 satuan litologi dari bawah keatas yaitu satuan pasir- lempung, satuan pasir I, satuan lempung dan satuan pasir II.Hasil analisis granulometri menunjukkan bahwa satuan pasir I dan II diperkirakan sebagai pematang pantai,  yang diendapkan pada lingkungan pantai yang dipengaruhi oleh sungai. Berdasarkan analisa paleontologi satuan pasir lempung dan satuan lempung diendapkan pada lingkungan laut dangkal.
Studi Potensi Batuan Induk pada Sub Cekungan Banyumas dan Serayu Utara Kamtono, Kamtono; Praptisih, Praptisih; Siregar, M. Safei
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 15, No 1 (2005)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1672.274 KB) | DOI: 10.14203/risetgeotam2005.v15.184

Abstract

Kajian yang dilakukan di daerah Banjarnegara, Wonosobo dan Kebumen bertujuan  untuk memperoleh data permukaan endapan klastik berbutir halus serta karakteristik litofasiesnya yang diduga berpotensi sebagai batuan induk. Sebanyak 9 conto dianalisa kandungan material organik karbonnya (TOC). Hasil analisa tersebut memperlihatkan bahwa nilai TOCnya berkisar antara   0,08 % dan 1,42 %. Berdasarkan hasil tersebut, didapatkan 2 conto berpotensi baik dan 3 conto berpotensi sedang  untuk dapat membentuk hidrokarbon, sedangkan  4 conto lainnya tidak berpotensi untuk membentuk hidrokarbon. Pyrolisis rock-eval dilakukan terhadap 5 conto yang berpotensi membentuk hidrokarbon, dan mempunyai nilai HI berkisar antara 26 dan 95 mgHC/gTOC. Berdasarkan nilai parameter evaluasi batuan induk HI (Waples, 1985), conto tersebut  berada dalam fasies organik CD dan D. Batuan induk tersebut dapat menghasilkan gas dalam kuantitas kecil. Hasil sementara dari pengamatan singkapan menunjukkan bahwa batuan klastik berbutir halus di daerah Banjarnegara diduga diendapkan dalam lingkungan dysaerob
Extensional Tectonic Regime of Garut Basin based on Magnetotelluric Analysis Handayani, Lina; Kamtono, Kamtono; Wardhana, D. D.
Indonesian Journal on Geoscience Vol 8, No 3 (2013)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (854.834 KB) | DOI: 10.17014/ijog.8.3.127-133

Abstract

DOI: 10.17014/ijog.v8i3.162Garut Basin are is part of Bandung-Garut Greater Basin (Bandung Zone) characterized by a large basin surrounded by mountain ranges. Active volcanoes had distributed their material as pyroclastic deposits around the outer border of the zone and as lava flow deposit separating the two basins. Bouguer gravity anomaly data had also indicated the presence of several low anomaly closures at about the area of Bandung and Garut Basins that were surrounded by high gravity anomaly zones. Two magnetotelluric surveys were completed to acquire the subsurface model that might explain the tectonic evolution of studied area. The first stage was characterized sby the presence of horst - graben structures that might imply an extensional regime of the area. The next stage of evolutionwas indicated by the horizontal layering correlated to the relative non-active tectonic. In addition, a most recent structure that appeared near the surface might suggest a possible extension force as the current stage.
STRUKTUR TINGGIAN DI SUB CEKUNGAN MAJALENGKA BERDASARKAN METODE GAYABERAT Wardhana, Dadan Dani; Kamtono, Kamtono; Gaol, Karit Lumban
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 26, No 2 (2016)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/risetgeotam2016.v26.278

Abstract

Majalengka sub-basin in the eastern part of the Bogor Basin is mostly covered by thick volcanic deposits. However, oil and gas seepage appeared in the volcanic area. Due to seismic technology has not been able to penetrate the thick layers of volcanic rock, gravity is an alternative method to describe subsurface conditions in this area. Gravity method can determine the configuration of the basin based on different rock density. Identification of the structure and determination of structural high area is analyzed based on interpretation of gravity anomaly, residual anomaly, gradient analysis and 3D modeling of the gravity. Vertical gradient technique was used to determine the position of fault structure, while the Second Vertical Derivative (SVD) to determine the type of fault. A 3-dimensionals model was made to determine the distribution and geometry of the basin. The results showed that the structures control the formation of the basin is in the form of northwest-southeast reverse fault, east-west and southwest-northeast shear fault. The depth of the basement in the study area is between 2700-5000 m. These gravity analysis provide the information of structural highs that allow the presence of hydrocarbon trap: Kadipaten- Majalengka and Ujungjaya-Babakan Gebang High.Sub-cekungan Majalengka termasuk dalam Cekungan Bogor bagian timur yang   sebagian besar tertutup oleh endapan vulkanik yang cukup tebal.  Namun demikian cekungan ini mempunyai rembesan minyak dan gas yang banyak muncul di area vulkanik. Hingga saat ini, teknologi seismik belum mampu menembus lapisan vulkanik tebal untuk mengungkap konfigurasi lapisan batuan di bawahnya. Oleh karena itu digunakan metode gayaberat sebagai metode alternatif dalam menggambarkan kondisi bawah permukaan yang tertutup batuan vulkanik. Gayaberat adalah salah satu metoda geofisika yang dapat digunakan untuk mengetahui konfigurasi cekungan berdasarkan perbedaan parameter fisis densitas batuan. Identifikasi struktur dan penentuan area tinggian dilakukan berdasarkan interpretasi dari peta anomali gayaberat dan anomali residual, analisis teknik gradien dan pemodelan 3D gayaberat. Teknik gradien vertikal digunakan untuk menentukan posisi struktur sesar sedangkan Second Vertical Derivative (SVD) untuk menentukan jenis sesar. Model 3-dimensi dibuat untuk menentukan sebaran dan geometri cekungan. Hasil penelitian menunjukkan bahwa struktur yang mengontrol pembentukan cekungan adalah berupa sesar naik arah baratlaut-tenggara, sesar geser arah barat-timur dan baratdaya-timurlaut. Kedalaman basement pada daerah penelitian antara 2700-5000 m. Peta anomali Bouguer, anomali residual dan model 3D gayaberat memberikan informasi terdapat tinggian yang memungkinkan terdapatnya perangkap hidrokarbon, yaitu Tinggian Kadipaten–Majalengka dan Ujungjaya-Babakan Gebang.