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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

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 Â 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 â 1.14 % and Tmax of 431 â 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.Â

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

DOI:Â 10.17014/ijog.v6i1.112An understanding of deepwater turbidite sediments is very important mainly dealing with the determinationÂ of a reservoir geometry. The problem arising in the turbidite sediment geometry is very complex and varied,Â and its existence depends on how, when, and type of its environment. In Central Java, the broad turbiditeÂ sediment distribution of the Halang Formation is needed to be observed its facies association. This paperÂ will discuss the turbidite facies of Halang Formation in the Ajibarang area. The method used to analyzeÂ the turbidite facies is by measuring stratigraphic sections and observing the lithofacies characteristics toÂ reconstruct its depositional environment. The Halang Formation outcrop in the Ajibarang area is dominantlyÂ composed of alternating sandstone and claystone or marl. Based on the observation, the turbidite facies ofÂ Halang Formation, in the Ajibarang area, was deposited on a submarine fan system at the middle fan ofÂ suprafan lobes. Compiling with the previous studies, the source of the Halang Formation is indicated to beÂ derived from the south southwest.

Depositional Environment of the Batuasih Formation on the Basis of Foraminifera Content: A Case Study in Sukabumi Region, West Java Province, Indonesia Hendrizan, M.; Praptisih, Praptisih; Putra, Purna S.
Indonesian Journal on Geoscience Vol 7, No 2 (2012)
Publisher : Geological Agency

DOI:Â 10.17014/ijog.v7i2.139The research was carried out on the sediments of the Batuasih Formation cropping out at Batuasih Village, Cibatu River, Padaarang Sukabumi. Data obtained from field observation, as well as foraminifera and sedimentology analyses conducted in the laboratory, were used to interpret its depositional environment. The investigation was focused on planktonic and benthic foraminiferal assemblages for depositional environment interpretation that might not be used by previous researchers. The Batuasih Formation is composed of black shaly claystone, where the lower part is rich in clay ball, and limestone intercalations in the upper part of the formation. In Cibatu Section, no clay balls is recognized in the lower part, but intercalations of limestone still occur. However, a contrast difference is found in Padaarang section, where green claystone interbeds with fine-grained sandstone. The Batuasih Formation conformably overlies the Walat Formation containing conglomerate. Foraminifera fossil found in the Batuasih Formation consists of bad preserved black benthic and planktonic foraminifera, more abundant towards the lower part of formation. Based on foraminifera assemblage comprising genus Uvigerina, Cibicides, Elphidium, Operculina, Bulimina, Bolivina, Eponides, and Neoconorbina, supported by sedimentology data, the Batuasih Formation was deposited in a shallow to deep marine environtment, during Early Oligocene (P19) time. Upwards to be the Rajamandala Formation, the depositional environment tends to be shallower gradually.

KARAKTERISTIK BATUAN INDUK HIDROKARBON DAN HUBUNGANNYA DENGAN REMBESAN MINYAK DI LAPANGAN MINYAK CIPLUK, KABUPATEN KENDAL, PROVINSI JAWA TENGAH Praptisih, Praptisih
Buletin Sumber Daya Geologi Vol 11, No 2 (2016): Buletin Sumber Daya Geologi
Publisher : Buletin Sumber Daya Geologi

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Lapangan minyak Cipluk di Cekungan Serayu Utara merupakan lapangan minyak tua jaman Belanda yang telah ditinggalkan, dan belum pernah dilakukan analisis geokimia minyak atau batuan yang diduga sebagai batuan sumber. Tujuan penelitian ini adalah untuk mengetahui karakteristik batuan induk dari Formasi Kerek dan Formasi Penyatan dan hubungannya dengan rembesan minyak bumi di Sojomerto. Metodologi yang dilakukan adalah penelitian lapangan dan analisis laboratorium. Dari analisis batuan induk diperoleh nilai Kandungan Organik Karbon (TOC) yang berkisar dari 0,72% sampai 7,97%, yang menunjukan kategori sedang hingga sangat baik untuk mampu membentuk hidrokarbon. Berdasarkan pirolisis rock eval tingkat kematangan thermal dari conto berada dalam kisaran belum matang hingga matang, sedangkan tipe kerogennya termasuk ke dalam tipe III. Hasil analisis geokimia conto minyak menunjukan minyak yang telah mencapai tingkat matang, batuan induk minyak diendapkan pada lingkungan estuarin atau lakustrin dangkal dengan material organik yang berasal dari tumbuhan daratan. Rembesan minyak di Sojomerto tidak mempunyai korelasi geokimia dengan conto batuan induk dari Formasi Kerek atau Formasi Penyatan.Â Â

GEOKIMIA BATUAN INDUK HIDROKARBON FORMASI CINAMBO DI DAERAH SUMEDANG, JAWA BARAT Praptisih, Praptisih
Buletin Sumber Daya Geologi Vol 12, No 3 (2017): Buletin Sumber Daya Geologi
Publisher : Buletin Sumber Daya Geologi

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Penelitian geokimia batulempung telah dilakukan pada Formasi Cinambo di wilayah Kabupaten Sumedang, dengan tujuan untuk mengetahui karakter batuan induk dan biomarker ekstrak batuan serta hubungannya dengan rembesan minyak di daerah Majalengka. Metode yang dilakukan adalah penelitian lapangan dan analisis laboratorium yang meliputi analisis Total Organic Carbon (TOC), pirolisis Rock Eval dan Gas Chromatography Mass Spectrometry (GCMS). Penelitian lapangan meliputi pengamatan litostratigrafi Formasi Cinambo pada Sungai Cinambo dan Cisaar serta pengambilan Â percontoh untuk analisis laboratorium. Hasil analisis dari 16 percontoh batulempung Formasi Cinambo menunjukkan nilai TOC 0,32-1,47% yang berpotensi rendah hingga baik untuk membentuk hidrokarbon. Material organik di daerah penelitian termasuk dalam kerogen tipe III, berdasarkan diagram TOC vs Hydrogen Index (HI). Tingkat kematangan 4 percontoh mengindikasikan kondisi belum matang (immature), 6 percontoh termasuk matang dan 6 percontoh lainnya tidak terdeteksi. Berdasarkan nilai HI, yaitu 2-90, dapat menghasilkan gas dengan kuantitas kecil. Hasil biomarker ekstrak batuan Formasi Cinambo menunjukkan tidak ada korelasi positif dengan rembesan minyak di daerah Majalengka.

KARAKTERISTIK BATUAN INDUK HIDROKARBON FORMASI CIBULAKAN DI DAERAH PALIMANAN, CIREBON, JAWA BARAT Praptisih, Praptisih; Kamtono, Kamtono
Buletin Sumber Daya Geologi Vol 9, No 1 (2014): Buletin Sumber Daya Geologi
Publisher : Buletin Sumber Daya Geologi

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Penelitan batuan induk hidrokarbon yang dilakukan pada Formasi Cibulakan didaerah Palimanan, Cirebon bertujuan untuk memperoleh data permukaan endapan klastik berbutir halus serta karakteristik litofasies yang diduga sebagai batuan induk hidrokarbon. Metode yang dipakai adalah penelitian lapangan dan laboratorium. Penelitian lapangan meliputi pengamatan stratigrafi detil dan pengambilan conto batuan, sedang analisis laboratorium terdiri dari analisis kandungan Total Organic Carbon dan analisis Pirolisis RockÂ Eval. Hasil analisis Total Organic Carbon terhadap 17 conto batulempung dan batulanau yang diambil dari Formasi Cibulakan menunjukkan nilai berkisar 0,27-4,43%, dan umumnya mempunyai potensi membentuk hidrokarbon dalam katagori rendah hingga sangat baik. Pirolisis Rock Eval dilakukan terhadap 9 conto yang berpotensi membentuk hidrokarbon danÂ memperlihatkan nilai T sebesar 331-557Â°C. Nilai yang menunjukkan tingkat kematangan termal sebanyak 6 conto dinyatakan matang hingga pasca matang dengan nilai T maxÂ berkisar 445-557Â°C, sedang 3 conto lainnya belum matang dengan nilai T sebesar 331-362Â°C. Nilai Hydrogen Index berkisar 3-338 mg Hydrocarbon/g Total Organic Carbon, dan berada dalam fasies BC, CD dan D. Batuan induk tersebut dapat menghasilkan minyak dalam kuantitas sedang dan gas dalam kuantitas kecil. Potensi hidrokarbon di daerah penelitian menunjukkan kategori kekayaan material organik rendah hingga sangat baik, dengan kerogen termasuk tipe II dan III. Kualitas batuan sumber berdasarkan nilai Hydrogen Index termasuk dalam kategori gas prone dan oil prone.Â Â

Potensi Batuan Induk Hidrokarbon pada Formasi Cinambo di Daerah Majalengka, Jawa Barat Praptisih, Praptisih; Kamtono, Kamtono
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 1 (2016): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Penelitan endapan klastik berbutir halus dan karakteristik litofasies batuan Formasi Cinambo bertujuan untuk memperkirakan potensi batuan induk dalam menghasilkan minyak dan gas di daerah Majalengka. Pengambilan 14 contoh batuan dilakukan untuk analisa geokimia di laboratorium yaitu analisa kandungan TOC , analisa Pirolisis Rock-Eval dan GC-MS. Hasilnya menunjukkan nilai TOC sebesar 0,42 – 1,90 %, potensi rendah hingga baik untuk membentuk hidrokarbon. Hasil analisis pyrolisis rock Eval memperlihatkan T max sebesar 359 - 475 oC termasuk kategori belum matang hingga paska matang. Berdasarkan nilai HI sebesar 12 – 114 mg HC/g TOC, fasies organic di daerah penelitian dapat dibagi menjadi 2 fasies yaitu fasies CD dan D, dapat menghasilkan minyak dalam kuantitas sedang dan gas dalam kuantitas relatif kecil. Type kerogen Formasi Cinambo di daerah penelitian berdasarkan diagram TOC versus PY menunjukkan tipe kerogen III, termasuk oil prone dan gas prone. Hasi analisis GCMS menunjukkan bahwa batuan induk di daerah penelitian mempunyai kondisi lingkungan pengendapan yang material organiknya berasal dari tanaman darat. Kata Kunci : batulempung, batuan induk, hidrokarbon, Formasi Cinambo, TOC.

FASIES KARBONAT FORMASI CAMPURDARAT DI DAERAH TULUNGAGUNG, JAWA TIMUR Praptisih, Praptisih; Siregar, M. Safei
Jurnal Geologi dan Sumberdaya Mineral Vol 22, No 2 (2012): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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The Campurdarat Formation is one of the carbonate rocks exposed in the Tulungagung areas and its surrounding, East Java. Detail investigation for studying facies and sedimentation of this limestone has been conducted. The investigation include field investigation and laboratory method, consisting of petrography and micropaleontology. The result of petrographic analysis showed that the carbonate rocks in the area investigation can be divided into four types of facies such as packstone, floatstone, rudstone and boundstone. Packstone facies was deposited from the backreef – lagoon environment, floatstone facies in backreef and coral zones environments, rudstone facies in the reef zone environment and boundstone facies formed starting from the reef front - reef crest. The Campurdarat carbonate rocks are interpreted to represent a barrier – reef of Early Miocene age.Key words : Campurdarat Formation , facies, carbonate, environment, sedimentation, reef, Tulungagung

Fasies, lingkungan pengendapan dan sifat fisik (kesarangan dan kelulusan) batuan karbonat Formasi Parigi di daerah Pangkalan Karawang, Jawa Barat Praptisih, Praptisih
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 4 (2016): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Parigi Formation carbonate rocks well croped out in the Pangkalan area, Karawang. Research methods include both of field research of detailed observations of Parigi Formation carbonate rocks and laboratory analysis consisting of petrography and paleontology. The results showed that the carbonate rock of the Parigi formation can be identified into seven facies carbonate namely (1) plangtonic packstone facies, (2) foraminiferal packstone facies, (3) packstone facies, (4) bindstone facies, (5) rudstone facies, (6) Framstone facies, and (7) algal-forams packstone facies. The Parigi Formation estimated deposited on the environments lower reef slope, reef front, reef crest and backreef. The results of the analysis of large foraminifera fossils show the age Parigi Formation is Early Miocene. The physical analysis showed that porosity and permeability founded in framestone facies, up to 25.84% and 21.13 mD permeability. From the pattern of depositional environment The Parigi Formation in the central basin that is probably is in the west-southwest area. Keywords: carbonate rocks, Parigi Formation, facies, depositional environments, reefs

Re-Interpretasi Formasi Kerek Di Daerah Klantung, Kendal, Berdasarkan Data Stratigrafi dan Foraminifera Putra, Purna Sulastya; Praptisih, Praptisih
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 2 (2017): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Rock unit crops out surrounding the Cipluk oil field is part of the Kerek Formation according to the regional geological map, however, the stratigraphy, depositional environment and relative age of the rock unit is not clearly recognised. Detailed stratigraphic and micropaleontological studies have been done in the rock unit surrounding the Cipluk of oil field. The results show that the rock outcrops in the study area are composed by a repetition of marl intercalated by sandstones,identified as turbiditic facies part of a channel portion of supra fan lobe to outer fan that deposited in an upper bathyal. Based on planktonic foraminifera content, the relative age of rockunit is Pliocene to Late Pleistocene. According to the litological characteristics and relative age data, the rock unit in studied area seems to be not part of the Kerek Formation, but it belongs to part of the Kalibeng Formation. The result of this study is very important for updating the surface geological data in which will be very useful to understand the new petroleum system in this area. Keywords: Kerek Formation, Cipluk oil field, turbidite, Kalibeng Formation

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