scholarly journals Identifikasi Karakteristik Reservoar Berdasarkan Data Akuistik Impedan dan Log Neutron Porositas Studi Kasus: Lapangan Boonsville, USA

2021 ◽  
Vol 11 (1) ◽  
pp. 118
Author(s):  
Febrian Dedi Sastrawan ◽  
Irsan Ar Rahman ◽  
Rahmania Rahmania ◽  
Meidi Arisalwadi
Keyword(s):  
Gamma Ray ◽  
Shaly Sand ◽  
Data Log

<p>Penelitian ini berjudul Identifikasi Karakteristik Reservoar Berdasarkan Data Akuistik Impedan Dan Log Neutron Porositas Studi Kasus: Lapangan Boonsville, USA. Penelitian ini dilatarbelakangi oleh perlunya menemukan lokasi prospek hidrokarbon dalam upaya menjaga ketahanan energi. Tujuan dari penelitian ini antara lain untuk mendapatkan nilai <em>cutoff AI</em> <em>clean</em> <em>sand stone</em> pada formasi Caddo dan Vineyard berdasarkan hasil <em>crossplot</em> <em>log AI</em>, <em>density</em>, dan gamma ray dan untuk menentukan lokasi/zona yang di prediksi mengandung hidrokarbon pada formasi Caddo dan Vineyard berdasarkan hasil analisis inversi<em> AI</em>, porositas, dan analisis kualitatif data log. Metode yang digunakan dalam penelitian ini adalah metode seismik inversi impedansi akustik (<em>AI</em>). Metode seismik inversi<em> AI</em> digunakan untuk mendapatkan parameter fisis batuan yaitu impedansi akustik sehingga persebaran zona reservoar tempat tersimpannya cadangan hidrokarbon dapat diprediksi. Hasil sebaran<em> AI</em> pada volume seismik dapat digunakan untuk memprediksi sebaran porositas. Prediksi sebaran porositas pada volume seismik didapat dari hasil regresi linier antara nilai<em> AI</em> dengan data <em>log</em> porositas pada sumur B Yates 18 D. Hasil penelitian didapatkan nilai <em>cutoff AI clean sand stone</em> pada formasi Caddo sebesar 38000 - 55500 (ft/s) (gr/cc) dan pada formasi Vineyard sebesar 33000 - 37500 (ft/s) (gr/cc). Pada Top Caddo memiliki 4 zona yang diprediksi mengandung gas dengan reservoar berupa <em>clean sand stone</em>. Pada Top Vineyard ditemukan 3 zona yang diprediksi juga mengandung gas dengan reservoar berupa <em>shaly sand</em>.</p>

scholarly journals LITHOLOGY INTERPRETATION BASED ON WELL LOG DATA ANALYSIS IN “JS” FIELD

2019 ◽  
Vol 1 (01) ◽  
pp. 31-37
Author(s):  
Tri Wulan Sari ◽  
Sujito Sujito
Keyword(s):  
Data Analysis ◽  
Depositional Environment ◽  
Gamma Ray ◽  
Well Log ◽  
Log Data ◽  
Neutron Porosity ◽  
Shaly Sand ◽  
Log Data Analysis ◽  
Well Data ◽  
Data Log

Reservoir lithology types in a prospect zone of hydrocarbon can be known through well log data analysis, both qualitatively and quantitatively. Lithology interpretation based on qualitatively well log data analysis, has been successfully carried out by K-1 and K-3 well log data on JS Field, West Natuna basin, Riau Islands.Main focus of the research is types of lithology indicated by response the petrophysical well data log of Lower-Middle Miocene Arang Formation. Arang Formation was deposited immediately on top Barat formation and depositional environment in this formation is transitional marine - marine. Petrophysics log shows well data are log gamma ray, resistivity, neutron porosity, density, and sonic. The limitation of study are on four types lithology, they are coal, sand, sally sand, and shale. Lithology on well K-1 dominate by shale, there is thin intersection between sand and coal. The well of K-1 have sand thickest around six meter. While on well K-3 Petrophysics log data shows thin intersection between coal, sand, shaly sand, and dominated by shale. The thickest Sand have thickness 29 meter, and thicker than on K-1 well. The result in this study, the formation dominated by types of lithology “shale”.

scholarly journals Potensi Shale Hydrocarcon Formasi Brown Shale, Cekungan Sumatra Tengah Berdasarkan Data Log Mekanik

2018 ◽  
Vol 2 (1) ◽  
pp. 43
Author(s):  
Sugeng Widada ◽  
Salatun Said ◽  
Hendaryono Hendaryono ◽  
Listriyanto Listriyanto
Keyword(s):  
Source Rock ◽  
Host Rock ◽  
Gamma Ray ◽  
Organic Content ◽  
Hydrocarbon Exploration ◽  
Good Potential ◽  
Shale Formation ◽  
Rich Material ◽  
Data Log ◽  
Central Sumatra

<p>Formasi Brown Shale merupakan batuan induk utama hidrokarbon di Cekungan Sumatra Tengah. Penelitian ini bertujuan mengevaluasi potensi formasi tersebut sebagai batuan induk hidrokarbon dan implikasinya dalam eksplorasi shale hydrocarbon berdasarkan data wireline log. Evaluasi yang dilakukan meliputi penentuan ona prospek (shale  play), evaluasi kandungan material organik (TOC) untuk mengetahui tingkat kekayaan batuan induk dan evaluasi tingkat kematangannya. Tiga sumur, Sumur Gamma, Jeta dan Kilo dievaluasi dengan menggunakan Metoda Passey (1990) dan Bowman (2010) . Log Gamma Ray, Resistivitas, Sonic, Netron dan Densitas digunakan dalam studi ini.Dari hasil analisis menunjukkan Formasi Brown Shale yang tertembus oleh ketiga sumur tersebut tersusun oleh perselingan batulempung dan batulanau yang mengindikasikan mempunyai prospek sebagai batuan induk dengan tingkat kekayaan material organik miskin sampai kaya dan telah mencapai tingkat kematangan hidrokarbon. Kandungan TOC pada Sumur Gamma berkisar antara 2-8%(kaya) dan tingkat kematangan minyak dicapai pada kedalaman 6550 ft. Kandungan TOC pada Sumur Jeta berkisar antara 0-7%(miskin-kaya) dan tingkat kematangan minyak dicapai pada kedalaman 8550 ft. Kandungan TOC pada Sumur Kilo berkisar antara 0-9%(miskin-kaya) dan tingkat kematangan minyak dicapai pada kedalaman 8100 ft.Berdasarkan hasil tersebut menunjukkan Formasi Brown Shale yang tertembus oleh ketiga sumur di daerah telitian mempunyai potensi yang baik sebagai batuan induk hidrokarbon dan shale hidrokarbon.</p><p><em>The Brown Shale Formation is the main hydrocarbon sourcerock in the Central Sumatra Basin. This study aims to evaluate the potential of these formations as hydrocarbon bedrock and their implications in shale hydrocarbon exploration based on wireline log data. The evaluation includes determining the prospect of shale play, evaluating the total organic content (TOC) to determine the level of source rock wealth and evaluating its level of maturity. Three wells, Gamma Well, Jeta and Kilo were evaluated using the Passey (1990) and Bowman (2010) method. Gamma Ray, Resistivity, Sonic, Neutron and Density logs were used in this study. From the results of the analysis showed that the Brown Shale Formation penetrated by the three wells was composed by claystone and siltstone intervals which indicated having prospects as a source rock with poor organic to rich material levels. and has reached the level of hydrocarbon maturity. The TOC content in the Gamma Well ranges from 2-8% (rich) and the level of oil maturity is reached at a depth of 6550 ft. The TOC content in the Jeta Well ranges from 0-7% (poor-rich) and the level of oil maturity is reached at a depth of 8550 ft. The TOC content in the Kilo Well ranges from 0-9% (poor-rich) and the level of oil maturity is reached at a depth of 8100 ft. Based on these results shows the Brown Shale Formation penetrated by the three wells in the study area has good potential as a hydrocarbon host rock and hydrocarbon shale.</em></p>

Detailed quantitative sequence stratigraphic interpretation for the characterization of Amangi field using seismic data and well logs

2021 ◽  
Vol 19 (3) ◽  
pp. 63-82
Author(s):  
S. Inichinbia ◽  
Halidu Hamza
Keyword(s):  
Seismic Data ◽  
Gamma Ray ◽  
Hydrocarbon Exploration ◽  
Well Logs ◽  
Rock Properties ◽  
Sequence Stratigraphic ◽  
Resistivity Logs ◽  
Hydrocarbon Saturation ◽  
Shaly Sand ◽  
Net To Gross

The sequence stratigraphy of Amangi field of the Niger Delta was studied using seismic data and well logs. The field is a structurally  complex one and presents serious challenges to hydrocarbon exploration and production. The main objective of these analyses is to  identify sand intervals using the available data. Well log data were used as additional tools to constrain the seismic correlations in order to solve the correlation problem. The well logs were evaluated for the field’s petrophysical properties by combining the gamma ray and resistivity logs to determine reservoir zones with considerable hydrocarbon saturation. Also, the relationship between some basic rock properties/attributes and litho-types were determined for the study area. Next, well-to-seismic ties were produced and two horizons were picked. Acoustic impedance inversion was also performed which revealed “hard sands” due to mixed lithologies (heterolithics). This made it difficult to discriminate the sands from shales in the P-impedance domain alone. So, progress was made to determine the net-to-gross of the field. The analysis revealed that these reservoirs have shaly sand with shale content of 10%, porosity averaging 21%, and hydrocarbon saturation of 90%. The result established a vertical stack of a series of reservoirs in an anticlinal structure of which the H1000 and H4000 stand out for their huge volumes of rich gas condensate accumulation. This discovery provoked the drive for the first phase of development of this field. Keywords: stratigraphy, facies, net-to-gross, horizon, lithology, well-to-seismic tie, impedance

scholarly journals ANALISIS PETROFISIKA UNTUK PENENTUAN ZONA PROSPEK RESERVOAR HIDROKARBON DI LAPANGAN “X” CEKUNGAN BANGGAI

2020 ◽  
Vol 5 (1) ◽  
pp. 1-9
Author(s):  
Muh. Abduh ◽  
Harsano Jayadi ◽  
Widi Atmoko ◽  
Icha Untari Meidji
Keyword(s):  
Gamma Ray ◽  
Shale Volume ◽  
Data Log

Penelitian ini bertujuan untuk menentukan zona reservoar hidrokarbon pada lapangan ABD-1, ABD-2 dan ABD-3 yang dianalisis dengan menggunakan kuantitatif dan analisis kualitatif untuk menentukan sifat reservoar yang melibatkan data log gamma ray (GR), log neutron (NPHI) dan log densitas (RHOB). Tahap penentuan kandungan hidrokarbon dengan menggunakan data log resistivitas, log NPHI dan log RHOB. Penentuan zona reservoar reservoar hidrokarbon menggunakan analisis data log resistivitas dan log NPHI. Adapun analisis kuantitatif dalam penelitian ini menghitung nilai dari shale volume (Vshale), porositas (Ф), resistivitas (RW) dan saturasi air (SW). Hasil penelitian yang diperoleh dari analisis kuantitatif dengan menggunakan sumur ABD-1 pada kedalaman 7422 ft -7426 ft, 7869 ft – 7924 ft, 8033 ft – 8100 ft adalah dapat mengetahui persentase hidrokarbon yang terdapat pada zona tersebut. Untuk gas mempunyai harga Sw adalah 0 – 35, minyak mempunyai harga Sw adalah 35 – 65 dan air mempunyai harga Sw adalah 65. Persentase tersebut tidak dapat menjadi tolak ukur untuk asusmsi hidrokarbon yang berisi oil dan gas, karena jika harga Sw 35 bisa jadi oil ataupun sebaliknya. Jika menggunakan analisis kualitatif diperoleh bahwa zona reservoir pada kedalaman 7422 ft – 7426 ft merupakan hidrokarbon yang mengandung gas. Pada kedalaman 7638 ft – 7730 ft merupakan hidrokarbon yang mengandung gas. Reservoar pada kedalaman 7422 ft – 7426 ft merupakan hidrokarbon yang mengandung air.    

scholarly journals Lithology and Fluid discrimination of Sody field of the Nigerian Delta

2020 ◽  
Vol 24 (8) ◽  
pp. 1321-1327
Author(s):  
S.C.P. Finecountry ◽  
S. Inichinbia
Keyword(s):  
Niger Delta ◽  
Gamma Ray ◽  
Water Saturation ◽  
Total Porosity ◽  
Reservoir Properties ◽  
High Hydrocarbon ◽  
Average Porosity ◽  
Reservoir Porosity ◽  
Shaly Sand ◽  
Net To Gross

The lithology and fluid discrimination of an onshore Sody field, of the Niger Delta was studied using gamma ray, resistivity and density logs from  three wells in the field in order to evaluate the field’s reservoir properties. Two reservoir sands (RES 1 and RES 2) were delineated and identified as hydrocarbon bearing reservoirs. The petrophysical parameters calculated include total porosity, water saturation and volume of shale. The results obtained revealed that the average porosity of the reservoir sands, range from 21% to 39%, which is excellent indicator of a good quality reservoir and probably reflecting well sorted coarse grain sandstone reservoirs with minimal cementation. Water saturation is low in all the reservoirs, ranging from 2% to 32%, indicating that the proportion of void spaces occupied by water is low, and implying high hydrocarbon saturation. The crossplot discriminated the reservoirs lithologies as sand, shaly sand and shale sequences, except well Sody 2 which differentiated its lithologies as sand and shale sequences and distinguished the reservoirs’ litho-fluids into three, namely; gas, oil and brine. These results suggest that the reservoirs sand units of Sody field contain significant accumulations of hydrocarbon. Keywords: Reservoir, porosity, net-to-gross, impedance, lithology

scholarly journals Foraminiferal Biozonation of Late Eocene - Early Oligocene sediments of BC-1 well, Onshore, Western Niger Delta Basin, Nigeria

2021 ◽  
Vol 25 (2) ◽  
pp. 287-296
Author(s):  
F.O. Amiewalan ◽  
J.A. Edegbai
Keyword(s):  
Niger Delta ◽  
Gamma Ray ◽  
Analytical Data ◽  
Late Eocene ◽  
Early Oligocene ◽  
Lithostratigraphic Units ◽  
Shaly Sand ◽  
Stratigraphic Ranges ◽  
Niger Delta Basin ◽  
Gamma Ray Log

Foraminiferal analysis was carried out on forty (40) ditch cutting samples from BC-1 well in the Onshore, Western Niger Delta at depth intervals of 5590 ft. - 8300 ft. Lithologic description of the samples together with the gamma ray log analytical data indicated the presence of four lithostratigraphic units composed of shale, sandstone, sandy shale and shaly sand corresponding to the continental Benin and paralic Agbada Formations. A total of twelve (12) species defined into eleven (11) genera, six (6) subfamilies and eleven (11) families were recovered. Benthonic and planktonic foraminiferal species constitute approximately 82 % and 18 % respectively. The calcareous benthics make up 44.4 % while the arenaceous benthics representing 37.7% of the total foraminiferal assemblages.  Foraminiferal index marker species - Globorotalia opima nana, Nonion oyae, Cassigerinella chipollensis and Spiroplectammina wrightiirevealed that the age of the studied well is from Late Eocene - Early Oligocene epoch. This indicated that both the planktonic and benthonic foraminiferal recovered from the well contained the transition between the Priabonian and the Rupelian age. Three (3) informal foraminiferal zone were established - Nonion oyae zone, Cassigerinella chipollensis zone and undiagnostic zone. The zones compares with foraminiferal markers species whose stratigraphic ranges are well established in the Niger Delta and globally. Keyword: Lithostratigraphic units, Agbada Formation, Eocene, Oligocene and Biozone.

On the possible gamma-ray source in Cygnus

1967 ◽  
Vol 31 ◽  
pp. 469-471
Author(s):  
J. G. Duthie ◽  
M. P. Savedoff ◽  
R. Cobb
Keyword(s):  
Gamma Rays ◽  
Gamma Ray ◽  
Right Ascension

A source of gamma rays has been found at right ascension 20h15m, declination +35°, with an uncertainty of 6° in each coordinate. Its flux is (1·5 ± 0·8) x 10-4photons cm-2sec-1at 100 MeV. Possible identifications are reviewed, but no conclusion is reached. The mechanism producing the radiation is also uncertain.

Solar Flare Energetic Neutral Emission Measurements in the Project Coronas-I

1994 ◽  
Vol 144 ◽  
pp. 635-639
Author(s):  
J. Baláž ◽  
A. V. Dmitriev ◽  
M. A. Kovalevskaya ◽  
K. Kudela ◽  
S. N. Kuznetsov ◽  
...  
Keyword(s):  
Solar Flare ◽  
Energy Range ◽  
Gamma Rays ◽  
Pulse Shape ◽  
Gamma Ray ◽  
Pulse Shape Discrimination ◽  
Shape Discrimination ◽  
Solar Neutron ◽  
Low Altitude

AbstractThe experiment SONG (SOlar Neutron and Gamma rays) for the low altitude satellite CORONAS-I is described. The instrument is capable to provide gamma-ray line and continuum detection in the energy range 0.1 – 100 MeV as well as detection of neutrons with energies above 30 MeV. As a by-product, the electrons in the range 11 – 108 MeV will be measured too. The pulse shape discrimination technique (PSD) is used.

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