scholarly journals Konfigurasi Cekungan Tomori Berdasarkan Data Gayaberat

2019 ◽  
Vol 20 (1) ◽  
pp. 27
Author(s):  
Tatang Padmawidjaja
Keyword(s):  
Gravity Anomaly ◽  
Oil And Gas ◽  
Sedimentary Rocks ◽  
Bouguer Anomaly ◽  
Reservoir Rock ◽  
Ultramafic Rocks ◽  
Geophysical Research ◽  
Rock Density ◽  
Basin Area ◽  
Subsurface Modeling

Geophysical research in Tomori Basin, Kolonodale Bay using the gravity method was carried out to identified anticline structural trap in associated with hydrocarbon prospect. The occurence of hydrocarbon seepage in some places, indicate that hydrocarbon have been formed although its distribution is not clearly known. The gravity Bouguer anomaly resulted two groups of rock units: the group of 40 mGal up to 120 mGal gravity anomaly represent ultramafic rocks, and group of 30 mGal up to -80 mGal gravity anomaly reflected a sedimentary rocks basin. The subsurface modeling of the rock density can be grouped into three layers: the Cenozoic (2.5-2.55 gr/cm³ density), the Mesozoic (2.6-2.7 gr/cm³ density), and the Basement ( 2.8-2.9 gr/cm³ density). Elongated and vertical closure are reflected by anomaly 0-2 mGal with density 2.5 gr/cm3 to 2:55 mGal which is supposed to be oil and gas structures. The Source rock is characterized by  0  to -10 mGal anomaly  interpreted as oil kitchen at sub-basin area. Location of the reservoir rock is assumed in the Cenozoic layer on Salodik Group with density of 2.5 gr/cm³. The Basement is estimated at depth of 3.5-4 km, derived from the Group of metamorphic and volcanic rocks.Keyword: Gravity, basin, residual anomaly, fault, anticline.

scholarly journals Konfigurasi Cekungan Tomori Berdasarkan Data Gayaberat

2019 ◽  
Vol 20 (1) ◽  
pp. 27
Author(s):  
Tatang Padmawidjaja
Keyword(s):  
Gravity Anomaly ◽  
Oil And Gas ◽  
Sedimentary Rocks ◽  
Bouguer Anomaly ◽  
Reservoir Rock ◽  
Ultramafic Rocks ◽  
Geophysical Research ◽  
Rock Density ◽  
Basin Area ◽  
Subsurface Modeling

Geophysical research in Tomori Basin, Kolonodale Bay using the gravity method was carried out to identified anticline structural trap in associated with hydrocarbon prospect. The occurence of hydrocarbon seepage in some places, indicate that hydrocarbon have been formed although its distribution is not clearly known. The gravity Bouguer anomaly resulted two groups of rock units: the group of 40 mGal up to 120 mGal gravity anomaly represent ultramafic rocks, and group of 30 mGal up to -80 mGal gravity anomaly reflected a sedimentary rocks basin. The subsurface modeling of the rock density can be grouped into three layers: the Cenozoic (2.5-2.55 gr/cm³ density), the Mesozoic (2.6-2.7 gr/cm³ density), and the Basement ( 2.8-2.9 gr/cm³ density). Elongated and vertical closure are reflected by anomaly 0-2 mGal with density 2.5 gr/cm3 to 2:55 mGal which is supposed to be oil and gas structures. The Source rock is characterized by  0  to -10 mGal anomaly  interpreted as oil kitchen at sub-basin area. Location of the reservoir rock is assumed in the Cenozoic layer on Salodik Group with density of 2.5 gr/cm³. The Basement is estimated at depth of 3.5-4 km, derived from the Group of metamorphic and volcanic rocks.Keyword: Gravity, basin, residual anomaly, fault, anticline. DOI:10.33332/jgsm.2019.v20.1.27-36

scholarly journals Konfigurasi Cekungan Tomori Berdasarkan Data Gayaberat

2019 ◽  
Vol 20 (1) ◽  
pp. 27
Author(s):  
Tatang Padmawidjaja
Keyword(s):  
Gravity Anomaly ◽  
Oil And Gas ◽  
Sedimentary Rocks ◽  
Bouguer Anomaly ◽  
Reservoir Rock ◽  
Ultramafic Rocks ◽  
Geophysical Research ◽  
Rock Density ◽  
Basin Area ◽  
Subsurface Modeling

Geophysical research in Tomori Basin, Kolonodale Bay using the gravity method was carried out to identified anticline structural trap in associated with hydrocarbon prospect. The occurence of hydrocarbon seepage in some places, indicate that hydrocarbon have been formed although its distribution is not clearly known. The gravity Bouguer anomaly resulted two groups of rock units: the group of 40 mGal up to 120 mGal gravity anomaly represent ultramafic rocks, and group of 30 mGal up to -80 mGal gravity anomaly reflected a sedimentary rocks basin. The subsurface modeling of the rock density can be grouped into three layers: the Cenozoic (2.5-2.55 gr/cm³ density), the Mesozoic (2.6-2.7 gr/cm³ density), and the Basement ( 2.8-2.9 gr/cm³ density). Elongated and vertical closure are reflected by anomaly 0-2 mGal with density 2.5 gr/cm3 to 2:55 mGal which is supposed to be oil and gas structures. The Source rock is characterized by  0  to -10 mGal anomaly  interpreted as oil kitchen at sub-basin area. Location of the reservoir rock is assumed in the Cenozoic layer on Salodik Group with density of 2.5 gr/cm³. The Basement is estimated at depth of 3.5-4 km, derived from the Group of metamorphic and volcanic rocks.Keyword: Gravity, basin, residual anomaly, fault, anticline.

scholarly journals Konfigurasi Cekungan Tomori Berdasarkan Data Gayaberat

2019 ◽  
Vol 20 (1) ◽  
pp. 27
Author(s):  
Tatang Padmawidjaja
Keyword(s):  
Gravity Anomaly ◽  
Oil And Gas ◽  
Sedimentary Rocks ◽  
Bouguer Anomaly ◽  
Reservoir Rock ◽  
Ultramafic Rocks ◽  
Geophysical Research ◽  
Rock Density ◽  
Basin Area ◽  
Subsurface Modeling

Geophysical research in Tomori Basin, Kolonodale Bay using the gravity method was carried out to identified anticline structural trap in associated with hydrocarbon prospect. The occurence of hydrocarbon seepage in some places, indicate that hydrocarbon have been formed although its distribution is not clearly known. The gravity Bouguer anomaly resulted two groups of rock units: the group of 40 mGal up to 120 mGal gravity anomaly represent ultramafic rocks, and group of 30 mGal up to -80 mGal gravity anomaly reflected a sedimentary rocks basin. The subsurface modeling of the rock density can be grouped into three layers: the Cenozoic (2.5-2.55 gr/cm³ density), the Mesozoic (2.6-2.7 gr/cm³ density), and the Basement ( 2.8-2.9 gr/cm³ density). Elongated and vertical closure are reflected by anomaly 0-2 mGal with density 2.5 gr/cm3 to 2:55 mGal which is supposed to be oil and gas structures. The Source rock is characterized by  0  to -10 mGal anomaly  interpreted as oil kitchen at sub-basin area. Location of the reservoir rock is assumed in the Cenozoic layer on Salodik Group with density of 2.5 gr/cm³. The Basement is estimated at depth of 3.5-4 km, derived from the Group of metamorphic and volcanic rocks.Keyword: Gravity, basin, residual anomaly, fault, anticline. DOI:10.33332/jgsm.2019.v20.1.27-36

scholarly journals STUDI POTENSI MIGAS DENGAN METODE GAYABERAT DI LEPAS PANTAI UTARA JAKARTA

2016 ◽  
Vol 8 (1) ◽  
pp. 23
Author(s):  
Saultan Panjaitan ◽  
Nyoman Astawa
Keyword(s):  
Gravity Anomaly ◽  
Oil And Gas ◽  
Bouguer Anomaly ◽  
Normal Fault ◽  
Reservoir Rock ◽  
Reverse Fault ◽  
High Gravity ◽  
Low Gravity ◽  
Rock Density ◽  
Block Faulting

Anomali Bouguer dapat dibagi kedalam dua kelompok yaitu: Anomali gayaberat rendah terbentuk pada kisaran nilai 15 mGal hingga -40 mGal sebagai rendahan sinklin. Anomali gayaberat tinggi terbentuk pada kisaran nilai 40 mGal hingga 60 mGal sebagai tinggian antiklin. Formasi batuan dari atas hingga bawah sebagai berikut: Formasi Cisubuh rapat massa batuan 2.5 gr/cm³ ketebalan pada penampang ±1400 meter. Formasi Parigi rapat massa batuan 2.7 gr/cm³ ketebalan ± 400 meter. Formasi Cibulakan rapat massa batuan 2.6 gr/cm³ ketebalan ± 1600 meter. Formasi Jatibarang rapat massa 2.8 gr/cm³ ketebalan ± 1000 meter. Batuan reservoir didominasi lensa-lensa batupasir Formasi Cibulakan Atas, Cibulakan Bawah serta batugamping Formasi Parigi dan batupasir Formasi Talangakar. Batuan induk migas adalah serpih lakustrin halus Anggota Cibulakan Bawah (Formasi Talang Akar). Tinggian batuan reservoir pada anomali sisa antara 0 mGal hingga 16 mGal dan kedalaman pada penampang ± 1500 meter dengan rapat massa batuan 2.7 gr/cm³ Sesar normal terbentuk arah Utara-Selatan dan sesar naik arah Timur-Barat dikontrol oleh pematahan bongkah pada batuan alas metamorf dengan rapat massa 3.0 gr/cm³. Kata kunci: gayaberat, antiklin, anomali sisa, lepas pantai. Bouguer anomaly can be grouped into two parts: Low Gravity anomaly formed at 15 mGal to 40 mGal as syncline lower. High gravity anomaly formed at 40 mGal to 60 mGal as anticline high. Rock formation from the top to the bottom as follows: Cisubuh Formation rock of density with 2.5 gr / cm³ thickness at section of ± 1400 metre. Parigi Formation rock density of 2.7 gr / cm³ thicknees ± 400 metre. Cibulakan Formation density with 2.6 gr / cm³ thickness ± 1600 metre. Jatibarang Formation with density 2.8 gr / cm³ of thickness ± 1000 metre. Reservoir rock is dominated by lens of sandstone upper Cibulakan Formation, Lower Cibulakan and also Parigi Formation limestone and Talangakar Formation sandstone. Sourced rock of oil and gas from shales lacustrine of Cibulakan Lower or Talang Akar Formation. High Rocks reservoir at recidual anomaly range from 0 mGal to 16 mGal at section deepness ± 1500 metre with density of 2.7 gr / cm³, formed by normal fault of Northern-Southern direction and reverse fault Eastern-Western direction controlled by block faulting metamorphics bedrock with density of 3.0 gr / cm³. Keywords: gravity, anticline, recidual anomaly, offshore.

scholarly journals PROSPEK SUMBER DAYA ENERGI BERDASARKAN ANALISIS POLA ANOMALI GAYA BERAT DI DAERAH BIAK DAN SEKITARNYA, PAPUA

2016 ◽  
Vol 13 (2) ◽  
pp. 87 ◽  
Author(s):  
Saultan Panjaitan ◽  
Subagio Subagio
Keyword(s):  
Gravity Anomaly ◽  
Oil And Gas ◽  
East Coast ◽  
Gravity Anomalies ◽  
Source Rocks ◽  
Reservoir Rock ◽  
Ultramafic Rocks ◽  
Reservoir Rocks ◽  
Northern City ◽  
Fluid Reservoir

Hasil penelitian gayaberat di Pulau Biak menghasilkan anomali gayaberat yang dikelompokkan kedalam 2 (dua) satuan yaitu anomali gayaberat 50 mGal hingga 120 mGal membentuk rendahan anomali mencerminkan cekungan. Kelompok anomali gayaberat 120 mGal hingga 220 mGal membentuk tinggian anomali. Pola tinggian anomali sisa 0 mGal hingga 2 mGal diduga sebagai perangkap struktur migas yang terdapat di daerah Kota Biak utara, Mandon dan lepas pantai timur P. Pai. Batuan bertahanan jenis rendah antara 0 - 16 Ohm-meter yang mengindikasikan batuan reservoir jenuh fluida terbentuk di kedalaman 2500 meter. Kedalaman batuan dasar terbentuk antara 7000-8500 meter, dengan rapat massa batuan 2.9 - 3.1 gr/cm3 bertahanan jenis tinggi 1000-8200 Ohm-meter diduga sebagai cerminan dari batuan ultramafik kerak samudera. Batuan yang menyusun di daerah penelitian terdiri atas lapisan batuan Tersier dengan rapat massa 2.45 gr/cm3, batuan Pra-Tersier dengan rapat massa 2.75 gr/cm3 dan batuan dasar dengan rapat massa 3.1 gr/cm3. Batuan sumber adalah serpih Formasi Makat berumur Miosen dengan rapat massa batuan 2.45 gr/cm3, sedangkan batuan reservoir terdiri dari batupasir Formasi Mamberamo. Kata kunci Gayaberat, cekungan, migas, anomali sisa, rapat massa, sesar, antiklin, batuan sumber, tahanan jenis. Gravity research on the island of Biak gravity anomalies are grouped into two (2) units is a gravity anomaly 50 mgal up to 120 mgal is basin reflecting. Gravity anomaly 120 mgal up to 220 mgal formed heights anaomaly. Altitude residual anomaly from 0 mGal to 2 mgal is oil and gas as trapping structures contained in the northern City of Biak, off the east coast Mandon and P. Pai. The rocks is of low resistivity between 0 -16 Ohm-meter that indicates the saturated fluid reservoir rocks are in the depths of 2500 meter. The depth of the bedrock formed between 7000-8500 meters, with density 2.9 - 3.1 gr / cm3 is heights resistivity types of 1000-8200 Ohm-meter interpreted as a reflection of ultramafic rocks oceanic crust. The rocks in the study area consists of Tertiary rocks layers with a density 2.45 gr / cm3, the Pre-Tertiary rocks with density 2.75 gr / cm3 and bedrock with density 3.1 gr / cm3. The source rocks is of shale from Makat Formation Miocene age with density 2.45 gr / cm3, and the reservoir rock consists of sandstone Mamberamo Formation. Keywords: Gravity, basin, oil and gas, recidual anomaly, density, fault, anticline, source rocks, resistivity.

scholarly journals Pemodelan Anomali Gravitasi Menggunakan Grablox untuk Identifikasi Injeksi Fluida pada Reservoir

Kappa Journal ◽  
2020 ◽  
Vol 4 (2) ◽  
pp. 240-249
Author(s):  
Muhammad Zuhdi ◽  
◽  
Jannatin Ardhuha ◽  
Kosim Kosim ◽  
Wahyudi Wahyudi ◽  
...  
Keyword(s):  
Field Data ◽  
Oil And Gas ◽  
Synthetic Data ◽  
Reservoir Rock ◽  
Fluid Injection ◽  
Physical Parameters ◽  
Oil Saturation ◽  
Rock Density ◽  
Gas Saturation ◽  
Fluid Infiltration

The 4D microgravity method is a development of the gravity method with the time as the fourth dimension. This research was conducted to find a better way of interpreting the 4D gravity anomaly due to fluid injection around the reservoir. Researchers used GRABLOX for the interpretation of 4D anomalies around the reservoir. The results of the inversion of field data using GRABLOX provide the value of the injection fluid infiltration volume, which shows the distribution of the injection fluid movement on the reservoir. Another physical parameter that can be generated from GRABLOX with a modified value is the reduction in oil and gas saturation due to fluid injection. The inversion results using GRABLOX in the field data indicate a change in reservoir rock density up to 0.28 gr/cc associated with a reduction in gas and oil saturation. The reduction in gas saturation due to the injection fluid has the smallest value of 0% and the largest is up to 66%. The reduction in oil saturation only contributes to a density change of 20% of the reduction in gas saturation. The results of the GRABLOX trial on synthetic data and field data show that both can provide an identification of the movement of the injection fluid in the reservoir, as well as provide other physical parameters, ie. the reduction in oil saturation due to fluid injection.

Poroperm properties of reservoir rocks at Kachalivske oil and gas condensate field

2018 ◽  
pp. 18-24
Author(s):  
V. V. Fedoriv ◽  
Ya. M. Ftemov ◽  
I. O. Piatkovska ◽  
A. O. Trubenko
Keyword(s):  
Oil And Gas ◽  
Statistical Processing ◽  
Gas Condensate ◽  
Reservoir Rock ◽  
Geophysical Research ◽  
Reliable Determination ◽  
Reservoir Rocks ◽  
Experimental Laboratory ◽  
Rock Parameters

The results of laboratory, geological and geophysical research methods in Visean and Tournaisian reservoir rocks with complex type deposits of Kachalivske oil and gas condensate feild were analysed. The connection of structural and lithological characteristics with geophysical parameters was substantiated. In some cases, in the Visean and Tournaisian deposits, the multicomponent composition of the rock matrix affects the actual value of geophysical parameter, leading to erroneous conclusions about the reservoir, the nature of the saturation and depth of occurrence. As a result of the statistical processing of experimental laboratory studies and geophysical studies of wells in the Visean and Tournaisian deposits at Kachalivske oil and gas condensate feild, petrophysical models of reservoir rocks were developed allowing reliable determination of poroperm properties of such reservoir rocks. The developed models can be used both for determination the reservoir rock parameters and for quick interpretation of geophysical research results.

scholarly journals Geological Structure Analysis of Satellit Gravity Data in Oil and Gas Prospect Area of West Aceh-Indonesia

2019 ◽  
Vol 8 (1) ◽  
pp. 1-5 ◽  
Author(s):  
Dian Darisma ◽  
Marwan Marwan ◽  
Nazli Ismail
Keyword(s):  
Gravity Anomaly ◽  
Oil And Gas ◽  
Deep Structure ◽  
Gravity Data ◽  
Bouguer Anomaly ◽  
Geological Structure ◽  
Satellite Gravity ◽  
Vertical Derivative ◽  
Free Air Anomaly ◽  
Shallow Structure

Estimation of the subsurface geological structures in oil and gas prospect area of West Aceh has been done by utilizing gravity field anomaly of satellite gravity data. This research aim to analyze satellite gravity data in order to get geological features which is include deep and shallow structure or fault around oil and gas prospect area in West Aceh. The satellite gravity data is originally provided as Free Air Anomaly and should be corrected to get Complete Bouguer Anomaly (CBA). Furthermore, CBA was transformed into a horizontal plane and corrected from regional anomalous effects to obtain residual anomaly, horizontal and vertical derivative. From CBA, the gravity anomaly show good correlation with geological boundaries on different rock formation and the anomaly is decrease from NE-SW. Residual anomaly also gives same information with CBA but this anomaly focus on shallow structure. Furthermore, horizontal derivative and vertical derivative also show good correlation with geological structure or fault but in some areas the anomaly related with deep structure cannot be seen on the surface or geological map. Despite the result cannot correlate directly with oil and gas prospect area, satellite gravity can be used to identify gravity anomaly and also fault that related with hydrocarbon anomaly area

Simple Bouguer gravity anomaly maps of the Nenana basin area, Alaska

1991 ◽  
Author(s):  
Zenon C. Valin ◽  
J.W. Bader ◽  
D.F. Barnes ◽  
M.A. Fisher ◽  
R.G. Stanley
Keyword(s):  
Gravity Anomaly ◽  
Bouguer Gravity ◽  
Bouguer Gravity Anomaly ◽  
Nenana Basin ◽  
Basin Area

Deep fluids and their role in hydrocarbon migration and oil deposit formation exemplified by supercritical СO2

2021 ◽  
pp. 1-11
Author(s):  
Sara LIFSHITS
Keyword(s):  
Supercritical Fluid ◽  
Oil And Gas ◽  
Gas Permeability ◽  
Sedimentary Rocks ◽  
Source Rocks ◽  
Reservoir Properties ◽  
Hydrocarbon Migration ◽  
Geological Processes ◽  
Before And After ◽  
Oil Source

ABSTRACT Hydrocarbon migration mechanism into a reservoir is one of the most controversial in oil and gas geology. The research aimed to study the effect of supercritical carbon dioxide (СО2) on the permeability of sedimentary rocks (carbonates, argillite, oil shale), which was assessed by the yield of chloroform extracts and gas permeability (carbonate, argillite) before and after the treatment of rocks with supercritical СО2. An increase in the permeability of dense potentially oil-source rocks has been noted, which is explained by the dissolution of carbonates to bicarbonates due to the high chemical activity of supercritical СО2 and water dissolved in it. Similarly, in geological processes, the introduction of deep supercritical fluid into sedimentary rocks can increase the permeability and, possibly, the porosity of rocks, which will facilitate the primary migration of hydrocarbons and improve the reservoir properties of the rocks. The considered mechanism of hydrocarbon migration in the flow of deep supercritical fluid makes it possible to revise the time and duration of the formation of gas–oil deposits decreasingly, as well as to explain features in the formation of various sources of hydrocarbons and observed inflow of oil into operating and exhausted wells.

Sign in / Sign up

Export Citation Format

Share Document