Impact of diagenetic processes on the petrophysical properties and quality of the Miocene “Reefal limestone” reservoir in Al-Hamd field, Gulf of Suez, Egypt

2021 ◽  
Vol 36 (2) ◽  
Author(s):  
Mohamed M. Abouelhassan ◽  
Mohamed F. Abu-Hashish ◽  
Hany M. Ashry
Keyword(s):  
Gulf Of Suez ◽  
Petrophysical Properties ◽  
Diagenetic Processes

scholarly journals An integrated analysis of mineralogical and microstructural characteristics and petrophysical properties of carbonate rocks in the lower Indus Basin, Pakistan

2019 ◽  
Vol 11 (1) ◽  
pp. 1151-1167
Author(s):  
Waheed Ali Abro ◽  
Abdul Majeed Shar ◽  
Kun Sang Lee ◽  
Asad Ali Narejo
Keyword(s):  
Thin Section ◽  
Carbonate Rocks ◽  
Carbonate Rock ◽  
Indus Basin ◽  
Reservoir Quality ◽  
Data Sets ◽  
Petrophysical Properties ◽  
X Ray ◽  
Lower Indus Basin

Abstract Carbonate rocks are believed to be proven hydrocarbon reservoirs and are found in various basins of Pakistan including Lower Indus Basin. The carbonate rock intervals of the Jakkher Group from Paleocene to Oligocene age are distributed in south-western part of Lower Indus Basin of Pakistan. However, there are limited published petrophysical data sets on these carbonate rocks and are essential for field development and risk reduction. To fill this knowledge gap, this study is mainly established to collect the comprehensive high quality data sets on petrophysical properties of carbonate rocks along with their mineralogy and microstructure. Additionally, the study assesses the impact of diagenesis on quality of the unconventional tight carbonate resources. Experimental techniques include Scanning Electronic Microscopy (SEM), Energy-Dispersive X-ray Spectroscopy (EDS), and X-ray diffraction (XRD), photomicrography, Helium porosity and steady state gas permeability. Results revealed that the porosity was in range of 2.12 to 8.5% with an average value of 4.5% and the permeability was ranging from 0.013 to 5.8mD. Thin section study, SEM-EDS, and XRD analyses revealed that the samples mostly contain carbon (C), calcium (Ca), and magnesium (Mg) as dominant elemental components.The main carbonate components observed were calcite, dolomite, micrite, Ferron mud, bioclasts and intermixes of clay minerals and cementing materials. The analysis shows that: 1) the permeability and porosity cross plot, the permeability and slippage factor values cross plots appears to be scattered, which showed weaker correlation that was the reflection of carbonate rock heterogeneity. 2) The permeability and clay mineralogy cross plots have resulted in poor correlation in these carbonate samples. 3) Several diagenetic processes had influenced the quality of carbonates of Jakkher Group, such as pore dissolution, calcification, cementation, and compaction. 4) Reservoir quality was mainly affected by inter-mixing of clay, cementation, presence of micrite muds, grain compactions, and overburden stresses that all lead these carbonate reservoirs to ultra-tight reservoirs and are considered to be of very poor quality. 5) SEM and thin section observations shows incidence of micro-fractures and pore dissolution tended to improve reservoir quality.

scholarly journals The Evaluation of Reservoir Quality of Mishrif Formation in South and North Domes of Buzurgan Oil Field

2019 ◽  
Vol 9 (4) ◽  
pp. 89-106
Author(s):  
Ali Duair Jaafar ◽  
Dr. Medhat E. Nasser
Keyword(s):  
Physical Properties ◽  
Water Saturation ◽  
Oil Field ◽  
Reservoir Quality ◽  
Petrophysical Properties ◽  
The South ◽  
Reservoir Properties ◽  
Formation Evaluation ◽  
The North

Buzurgan field in the most cases regards important Iraqi oilfield, and Mishrif Formation is the main producing reservoir in this field, the necessary of so modern geophysical studies is necessity for description and interpret the petrophysical properties in this field. Formation evaluation has been carried out for Mishrif Formation of the Buzurgan oilfield depending on logs data. The available logs data were digitized by using Neuralog software. A computer processed interpretation (CPI) was done for each one of the studied wells from south and north domes using Techlog software V2015.3 in which the porosity, water saturation, and shale content were calculated. And they show that MB21 reservoir unit has the highest thickness, which ranges between (69) m in north dome to (83) m in south dome, and the highest porosity, between (0.06 - 0.16) in the north dome to (0.05 -0.21) in the south dome. The water saturation of this unit ranges between (25% -60%) in MB21 of north dome. It also appeared that the water saturation in the unit MB21 of south dome has the low value, which is between (16% - 25%). From correlation, the thickness of reservoir unit MB21 increases towards the south dome, while the thickness of the uppermost barrier of Mishrif Formation increases towards the north dome. The reservoir unit MB21 was divided into 9 layers due to its large thickness and its important petrophysical characterization. The distribution of petro physical properties (porosity and water saturation) has shown that MB 21 has good reservoir properties.

scholarly journals EFFECT OF POLLUTION ON THE WATER QUALITY OF THE GULF OF SUEZ

2000 ◽  
Vol 4 (1) ◽  
pp. 161-178 ◽  
Author(s):  
Mohamed Hamed ◽  
Tarek Said
Keyword(s):  
Water Quality ◽  
Gulf Of Suez

scholarly journals An Assessment on the Coastal Seawater Quality of the Gulf of Suez, Egypt

2020 ◽  
Vol 11 (01) ◽  
pp. 34-47
Author(s):  
Manal G. Mahmoud ◽  
Ehsan Abu El-Khir ◽  
Mahmoud H. Ebeid ◽  
Laila A. Mohamed ◽  
Mamdouh A. Fahmy ◽  
...  
Keyword(s):  
Gulf Of Suez ◽  
Coastal Seawater ◽  
Seawater Quality

SOCIETY OF PETROPHYSICISTS. ONLINE-PLATFORM FOR KNOWLEDGE MANAGEMENT AND SHARING

2020 ◽  
pp. 87-92
Author(s):  
E.N. Maksimova ◽  
E.G. Viktorov ◽  
E.O. Belyakov ◽  
B.V. Belozerov
Keyword(s):  
Knowledge Management ◽  
Communities Of Practice ◽  
Knowledge Sharing ◽  
Petrophysical Properties ◽  
Reservoir Properties ◽  
Online Platform ◽  
Log Interpretation ◽  
Uncertain Distribution ◽  
Technical Centre

The geology of oilfields is becoming more complex, which leads to uncertain distribution of petrophysical properties. Quality of reservoir properties prediction depends on petrophysical models and log interpretation algorithms. It is also connected with the level of expertise of each petrophysicist as well as knowledge sharing among experts and young specialists. The aim of this paper is to present Gazprom Neft Science and Technical Centre approach to development of petrophysical competences with communities of practice.

scholarly journals Structure-texture peculiarities influence on petrophysical properties of Neftekumsk carbonate sediments

2020 ◽  
Vol 164 ◽  
pp. 01007
Author(s):  
Natalia Yeriomina ◽  
Vladimir Gridin ◽  
Zinaida Sterlenko ◽  
Yelena Tumanova ◽  
Katerina Chernenko
Keyword(s):  
Pore Space ◽  
Three Dimensional ◽  
Carbonate Sediments ◽  
Petrophysical Properties ◽  
Petrophysical Parameters ◽  
The Core ◽  
Geological Models ◽  
Dimensional Distribution

The analysis of structure-texture peculiarities of carbonate sediments of Neftekumsk’ reservoir within the limits of Zimne-Stavkinsko- Pravoberezhny field was realized in the field of massive bioherm buildups and interreef lowerings in accordance with data of the core analyses. The existing pore space was divided into structure-texture classes. The correlations between petrofabrics and petrophysical parameters were determined. The received data can be used for describing of the three- dimensional distribution of petrophysical properties with the aim to increase the quality of three-dimensional (3-D) geological models.

THE CHARACTERISTICS OF PORE SPACE IN LOWER TRIASSIC SANDSTONES OF THE WARSAW REGION

2019 ◽  
Vol 474 (474) ◽  
pp. 73-84
Author(s):  
Marta KUBERSKA ◽  
Anna BECKER ◽  
Aleksandra KOZŁOWSKA
Keyword(s):  
Carbon Dioxide ◽  
Image Analysis ◽  
Pore Space ◽  
Carbon Dioxide Sequestration ◽  
Lower Triassic ◽  
Underground Storage ◽  
Petrophysical Properties ◽  
Secondary Porosity ◽  
Diagenetic Alteration ◽  
Diagenetic Processes

Reservoir and sealing properties of Lower Triassic sandstones from seven boreholes of the central part of the Koszalin-Zamość Synclinorium were investigated in terms of potential levels for underground storage of carbon dioxide. Extensive petrographic studies, image analysis, and investigations of petrophysical properties of rocks and pore space were carried out. The research shows that diagenetic processes both variously affected the intensity of alteration and variously shaped the pore space. Not only primary but also secondary porosity, resulting from diagenetic alteration and dissolution, is observed in the rocks. Microscopic observations revealed that the pore space in studied samples is dominated by macropores. The results obtained indicate a poor suitability of the Lower Triassic deposits for the purpose of carbon dioxide sequestration.

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