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All Journal Bulletin of Scientific Contribution : Geology Geological Engineering E-Journal Journal of Geoscience, Engineering, Environment, and Technology Sumatra Journal of Disaster, Geography and Geography Education Journal of Applied Geology
Wahyu Budhi Khorniawan
Program Studi Teknik Pertambangan, Universitas Islam Bandung
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Energy Engineering Environmental Science Physics

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Studi Mikrofasies dan Diagenesis Batuan Karbonat Formasi Poh, Cekungan Luwuk - Banggai, Kecamatan Pagimana, Kabupaten Luwuk, Provinsi Sulawesi Tengah Khorniawan, Wahyu Budhi
Geological Engineering E-Journal Vol 5, No 1 (2013): Volume 5, Nomor 1, Tahun 2013
Publisher : Geological Engineering E-Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (487.489 KB)

Abstract

Formasi  Poh  merupakan  salah  satu  Formasi  yang  diendapkan  pada  zaman  tersier  dalam cekungan Luwuk – Banggai, Sulawesi Tengah. Cekungan ini sangat menarik karena semua batuan dari yang berumur pra tersier hingga sekarang ini dapat tersingkap di lapangan. Formasi Poh mempunyai susunan litogi berupa batugamping dengan sisipan batulanau karbonatan. Penelitian ini bertujuan untuk menentukan mikrofasies dan lingkungan pengendapan batuan karbonat, mengetahui proses diagenesis yang berkembang serta lingkungan diagenesis batuan karbonat, menentukan umur relatif berdasarkan kelimpahan foraminifera besar   pada batuan, dan yang terakhir menentukan dinamika sikuenstratigrafi berdasarkan data mikrofasies yang terdiri dari data petrografi dan paleontologi yang teramati. Metodologi yang digunakan dalam penelitian adalah metode deskriptif dan metode analisis. Metode deskriptif yang dilakukan menguji hipotesis, membuat prediksi serta mendapatkan manfaat dari suatu masalah yang ingin dipecahkan, sedangkan untuk metode analisis yang digunakan  adalah  analisis  petrografi,  analisis  mikrofasies,  analisis  foraminifera  besar  dan analisis sikuenstratigrafi. Analisis mikrofasies dilakukan untuk menginterpretasi fasies, lingkungan pengendapan, tipe platform, proses dan lingkungan diagenesis, sedangkan analisis foraminifera  besar  diperlukan  untuk  menentukan  umur  batuan.  Berdasarkan  hasil  analisis tersebut dibuatlah kolom zonasi fasies yang disusun secara vertikal untuk memudahkan pendeteksian stacking pattern dari sebuah parasequence set. Dari hasil pengamatan sayatan tipis didapatkan 13 tipe dari batuan karbonat berdasarkan klasifikasi Dunham (1962), yang dimodifikasi Flugel (2010) , yaitu: Bioclast Large Foram Packstone, Bioclast Plangtonik Forams Packstone, Bioclast Plangtonik Forams Packstone with Quartz, Bioclast Red Algae Wackstone, Bioclast Red Algae Grainstone, Packstone with Dolomitation, Ooid Grainstone, Ooid Packstone, Bioclast Coral Rudstone, Bioclast Milliolids Grainstone, Bioclast Plangtonik Forams Packstone with Microspar, Interdeterminate Bioclast Packstone, dan Bioclast Red Algae Packstone with Microspar. Ke tigabelas tipe batuan tersebut tersebar kedalam 6 zonasi fasies Wilson (1975), yakni FZ 1 Deep Sea, FZ 3 Toe-Of-Slope Apron (Deep Shelf Margin), FZ 4 slope, FZ 5 Platform-Margin Reefs, FZ 7 Open Marine, dan FZ 8 Platform Interior – Restricted. Lingkungan pengendapan dari singkapan batuan karbonat ini adalah shallow marine shelf  dengan bentuk platform berupa rimmed carbonate.  Proses diagenesis yang berkembang diantaranya semen isopach yang menandai lingkungan marine phreatic, terbentuknya circumgranular cement yang menandai lingkungan meteoric phreatic, serta pertumbuhan mineral equant calcite, deformasi butiran, dan neomorfisme yang menandai lingkungan burial. Umur relatif singkapan menunjukkan kisaran umur P21 sampai N11 yaitu Oligosen  Akhir    -  Miosen  Tengah.  Data  yang  terkumpul  dari  analisis  sayatan  ini  dapat digunakan untuk mengidentifikasi sikuen pada batas parasequence set yang menunjukkan agradasi dan retrogradasi stacking pattern, dari sebuah system tracts yang diperkirakan sebagai transgressive system tracts dan highstand system tracts.
Studi Mikrofasies dan Diagenesis Batuan Karbonat Formasi Poh, Cekungan Luwuk - Banggai, Kecamatan Pagimana, Kabupaten Luwuk, Provinsi Sulawesi Tengah Wahyu Budhi Khorniawan
Geological Engineering E-Journal Vol 5, No 1 (2013): Volume 5, Nomor 1, Tahun 2013
Publisher : Program Studi Teknik Geologi, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (487.489 KB)

Abstract

Formasi  Poh  merupakan  salah  satu  Formasi  yang  diendapkan  pada  zaman  tersier  dalam cekungan Luwuk – Banggai, Sulawesi Tengah. Cekungan ini sangat menarik karena semua batuan dari yang berumur pra tersier hingga sekarang ini dapat tersingkap di lapangan. Formasi Poh mempunyai susunan litogi berupa batugamping dengan sisipan batulanau karbonatan. Penelitian ini bertujuan untuk menentukan mikrofasies dan lingkungan pengendapan batuan karbonat, mengetahui proses diagenesis yang berkembang serta lingkungan diagenesis batuan karbonat, menentukan umur relatif berdasarkan kelimpahan foraminifera besar   pada batuan, dan yang terakhir menentukan dinamika sikuenstratigrafi berdasarkan data mikrofasies yang terdiri dari data petrografi dan paleontologi yang teramati. Metodologi yang digunakan dalam penelitian adalah metode deskriptif dan metode analisis. Metode deskriptif yang dilakukan menguji hipotesis, membuat prediksi serta mendapatkan manfaat dari suatu masalah yang ingin dipecahkan, sedangkan untuk metode analisis yang digunakan  adalah  analisis  petrografi,  analisis  mikrofasies,  analisis  foraminifera  besar  dan analisis sikuenstratigrafi. Analisis mikrofasies dilakukan untuk menginterpretasi fasies, lingkungan pengendapan, tipe platform, proses dan lingkungan diagenesis, sedangkan analisis foraminifera  besar  diperlukan  untuk  menentukan  umur  batuan.  Berdasarkan  hasil  analisis tersebut dibuatlah kolom zonasi fasies yang disusun secara vertikal untuk memudahkan pendeteksian stacking pattern dari sebuah parasequence set. Dari hasil pengamatan sayatan tipis didapatkan 13 tipe dari batuan karbonat berdasarkan klasifikasi Dunham (1962), yang dimodifikasi Flugel (2010) , yaitu: Bioclast Large Foram Packstone, Bioclast Plangtonik Forams Packstone, Bioclast Plangtonik Forams Packstone with Quartz, Bioclast Red Algae Wackstone, Bioclast Red Algae Grainstone, Packstone with Dolomitation, Ooid Grainstone, Ooid Packstone, Bioclast Coral Rudstone, Bioclast Milliolids Grainstone, Bioclast Plangtonik Forams Packstone with Microspar, Interdeterminate Bioclast Packstone, dan Bioclast Red Algae Packstone with Microspar. Ke tigabelas tipe batuan tersebut tersebar kedalam 6 zonasi fasies Wilson (1975), yakni FZ 1 Deep Sea, FZ 3 Toe-Of-Slope Apron (Deep Shelf Margin), FZ 4 slope, FZ 5 Platform-Margin Reefs, FZ 7 Open Marine, dan FZ 8 Platform Interior – Restricted. Lingkungan pengendapan dari singkapan batuan karbonat ini adalah shallow marine shelf  dengan bentuk platform berupa rimmed carbonate.  Proses diagenesis yang berkembang diantaranya semen isopach yang menandai lingkungan marine phreatic, terbentuknya circumgranular cement yang menandai lingkungan meteoric phreatic, serta pertumbuhan mineral equant calcite, deformasi butiran, dan neomorfisme yang menandai lingkungan burial. Umur relatif singkapan menunjukkan kisaran umur P21 sampai N11 yaitu Oligosen  Akhir    -  Miosen  Tengah.  Data  yang  terkumpul  dari  analisis  sayatan  ini  dapat digunakan untuk mengidentifikasi sikuen pada batas parasequence set yang menunjukkan agradasi dan retrogradasi stacking pattern, dari sebuah system tracts yang diperkirakan sebagai transgressive system tracts dan highstand system tracts.
An Understanding of Volcanic Deposits With Two Dimensional Electrical Resistivity Imaging Survey at Talamau Mountain West Pasaman, Indonesia Caesario, Dipo; Aulia, Beni; Maiyudi, Riko; Khorniawan, Wahyu Budhi; Jayanti, Anita Galih Ringga
Sumatra Journal of Disaster, Geography and Geography Education Vol. 8 No. 1 (2024): Sumatra Journal of Disaster, Geography and Geography Education (June Edition)
Publisher : Sumatra Journal of Disaster, Geography and Geography Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/sjdgge.v8i1.596

Abstract

Understanding the distribution and characteristics of volcanic deposits is crucial for assessing geological hazards and resource potential. This study employs a two-dimensional electrical resistivity imaging (2D ERI) survey to model the subsurface structure of volcanic deposits at Talamau Mountain in West Pasaman, Indonesia. The survey was conducted to map the spatial extent, depth, and composition of these deposits, providing insights into their geophysical properties. The 2D ERI technique, which measures the electrical resistance of subsurface materials, allowed for the differentiation between various types of volcanic deposits based on their resistivity contrasts. Results from the survey reveal distinct layers of volcanic breccia, coarse tuff, fine tuff, and lava flows which are segmented by a fault that runs northeast to southeast. It is apparent in the 3D modelling results of the inversion of three 2D cross-sectional profiles that the trend in volcaniclastic materials has changed from aggradation to progradation. The integration of 2D ERI data with 3D geological modelling and stratigraphic analysis enhances our understanding of the volcanic history and subsurface complexity of Talamau Mountain. This approach not only aids in volcanic hazard assessment but also contributes to the broader geophysical knowledge of volcanic terrains for geologists and hazard mitigation planners in Talamau volcanic regions.
Provenance Analysis Based On Petrographic Samples On EXIA-1 Well, Banggai Basin, East Sulawesi, Indonesia Setyawan, Reddy; Aribowo, Yoga; Kurniasih, Anis; Fahrudin; Ali, Rinal Khaidar; Najib; Ferdy; Wijaya, Ennur Kusuma; Qadaryati, Nurakhmi; Khorniawan, Wahyu Budhi; Dalimunte, Hasnan Luthfi; Ringga, Anita Galih
Journal of Geoscience, Engineering, Environment, and Technology Vol. 9 No. 2 (2024): JGEET Vol 09 No 02 : June (2024)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2024.9.2.13367

Abstract

The structure of Exia is composed of Miocene built-up carbonates formed by shear faults. The buildup carbonate feature in the Exia prospect can be seen from the high elevation surrounded by lows with an NNE-SSW and NE-SW trending. The MA-1, SE-1, MI-1 wells are several wells in the Tiaka and Senoro Fields which are proven to have large gas reserves. Tiaka Field is located to the west of the Exia Well, while Senoro Field is to the northeast. The study used primary data from the Exia-1 well in the form of cutting samples. The wet and dry cutting samples were further processed into thin section. This thin section is then carried out for petrographic, XRD, and SEM analysis. Tomori Formation starts from the deeper environment FZ1 upwards to the shallower FZ5 –FZ6 (reef) with open marine and restricted areas. The allochem that composes the limestone at The Matindok Formation consists of red algae fragments and benthic forams which indicate the facies zone of formation in FZ 4 (slope). In the upper Mantawa Formation, it is still quite clear the presence of large forams indicating a reef association environment (FZ5-FZ6), but the presence of a large number of planktonic forams indicates a deeper depositional environment / slope, so it is possible that large forams were transported from a shallower environment. The Kintom Formation have rock provenance ranging from continental blocks in the interior of the craton to a recycled orogeny section of recycled quartz zone.
Quantitative Analysis of Thin Section using Frequency Measurement (Point Counting), a Case Study on Limestone of The Rajamandala Formation, Cikamuning, West Java, Indonesia Khorniawan, Wahyu Budhi; Ringga Jayanti, Anita Galih; Caesario, Dipo
Journal of Geoscience, Engineering, Environment, and Technology Vol. 9 No. 3 (2024): JGEET Vol 09 No 03 : September (2024)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2024.9.3.16489

Abstract

The description of thin sections observations has traditionally relied on the visual comparison method, often using a visual comparison chart. However, this method has interpretative limitations, as readings can vary between individuals, and the values produced tend to be rounded. The point counting method for determining frequency is one of the statistical approaches that quantitatively counts the presence of mineral grains or particles. The limestone samples were collected from the Rajamandala Formation in the Cikamuning area of West Java, Indonesia. The methodology involved petrographic observations using the point counting method, which entailed creating a grid on the thin sections with a total of 312 points and calculating the percentage of occurrence of the constituent rock compositions. The analysis results showed constituent composition percentages of 33.65% for corals, 52.24% for matrix, 4.81% for cement, 2.56% for calcite, 3.85% for replacement, and 2.88% for porosity, categorizing the rock as coral wackstone. The facies is determined based on the presence of biota, while diagenesis is determined by the presence of cement types, secondary porosity, and grain contacts. In the research area, the identified facies is open marine (FZ 7), and the diagenesis includes marine phreatic, meteoric phreatic, and burial diagenesis.
POLA PERSEBARAN DAN ESTIMASI CADANGAN ANDESIT PADA DESA CILULUK, KECAMATAN CICALENGKA, KABUPATEN BANDUNG Swastika, Arif; Syafriyono, .; Dipo, Caesario; Pratama, Ahmad Yuda; Kartanegara, Sony Malik; Khorniawan, Wahyu Budhi; Sayyidi, Muhammad; Natasia, Nanda
Bulletin of Scientific Contribution Vol 16, No 2 (2018): Bulletin of Scientific Contribution GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1193.448 KB) | DOI: 10.24198/bsc.v16i2.17919

Abstract

Abstrak - Andesit merupakan komoditas mineral non-logam yang berpotensi sebagai sumber bahan galian C. Desa Ciluluk, Kecamatan Cicalengka, Kabupaten Bandung secara tatanan geologi termasuk ke dalam Satuan Batuan Gunungapi Mandalawangi-Mandalagiri yang terdiri dari tuf dan lava berkomposisi andesit. Oleh karena itu, daerah ini dipilih sebagai lokasi studi untuk mengetahui pola persebaran andesit dan estimasi cadangannya. Pola persebaran andesit di daerah penelitian diprediksi berdasarkan data hasil survey geolistrik 1D dan 2D. Kemudian, estimasi cadangan dihitung menggunakan model sebaran 3D yang terbagi menjadi 2 skenario penambangan dengan mempertimbangkan kondisi topografi dan sebaran andesit. Berdasarkan pengamatan lapangan, andesit di daerah penelitian tersebar tidak merata dan dapat dibedakan menjadi 2 jenis yaitu soft dan hard andesite. Kedua tubuh andesit ini memiliki pola sebaran barat-timur dengan kenampakan fisik serta nilai resistivitas yang berbeda dimana hard andesite memiliki nilai resistivitas yang lebih tinggi (>350 Ωm). Hasil perhitungan cadangan menunjukkan bahwa cadangan andesit berkisar antara 3.861.267 ton untuk skenario 1 hingga 9.617.227 ton untuk skenario 2. Lebih lanjut, nilai cadangan ini bisa dibandingkan dengan melakukan perhitungan cadangan terukur berdasarkan data pengeboran disertai pengukuran topografi secara lebih rinci. Kata kunci – Andesit, Geolistrik, Cicalengka
Evaluation of Reservoir Characteristics of Wells X, Y, Z in the Pliocene Interval of the Tarakan Sub-Basin, Tarakan Basin, North Kalimantan Hendardi, Rizaldi Primanda; Hidajat, Wahju Krisna; Setyawan, Reddy; Kurniasih, Anis; Qadaryati, Nurakhmi; Khorniawan, Wahyu Budhi; Dalimunte, Hasnan Luthfi; Ringga, Anita Galih
Journal of Applied Geology Vol 9, No 2 (2024)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jag.86053

Abstract

The Tarakan Basin is one of the basins that has been producing hydrocarbons since 1901, with nine active oil fields to this day. The exploration of oil and gas in the Tarakan Basin has been ongoing for a considerable amount of time and can be considered as the oldest exploration in Indonesia that continues due to its estimated economically viable reserves based on its geological conditions. Research on the evaluation of reservoir characteristics in the Tarakan Sub-Basin with a Pliocene age interval aims to determine the subsurface lithology and fluid conditions qualitatively and the quantitative characteristics of the reservoir rocks. This study utilizes quantitative petrophysical analysis using a deterministic method with primary data consisting of wireline log data, as well as secondary data including core data, mud logs, biostratigraphy data, drill stem test data, and sidewall core data. Based on the analysis results, the petrophysical properties of the target reservoir in the study area include an average shale volume (VSH) of 16.65% - 29.31%, average effective porosity (PHIE) of 11.80% - 27.09%, which falls into the categories of fair to excellent quality, hydrocarbon saturation ranging from 7.68% - 43.03%, an average permeability value (PERM) of 10.03 mD - 613.29 mD, falling into the categories of good to very good, and a net pay thickness ranging from 4 feet to 16.7 feet, with a total thickness of 67.4 feet containing oil and gas fluids.
Co-Authors Beni Aulia, Beni Caesario, Dipo Dalimunte, Hasnan Luthfi Dalimunte, Hasnan Luthfi Dipo, Caesario fahrudin Ferdy Hendardi, Rizaldi Primanda Jayanti, Anita Galih Ringga Kartanegara, Sony Malik Kurniasih, Anis Najib Nanda Natasia Pratama, Ahmad Yuda Qadaryati, Nurakhmi Riko Maiyudi Rinal Khaidar Ali Ringga Jayanti, Anita Galih Ringga, Anita Galih Sayyidi, Muhammad Setyawan, Reddy Swastika, Arif Syafriyono, . Wahju Krisna Hidajat Wijaya, Ennur Kusuma Yoga Aribowo