scholarly journals The Distribution of Saturation Exponent and Cementation Factor in the Nubian Sandstone Formation, Sirt Basin, Libya Using Global Hydraulic Element App

2009 ◽  
Author(s):  
N.I.A. Mousa ◽  
P. Corbett
Keyword(s):  
Nubian Sandstone ◽  
Sandstone Formation ◽  
Saturation Exponent ◽  
Cementation Factor ◽  
Sirt Basin

Exploitation of Geological Resources

2021 ◽  
pp. 953-974
Author(s):  
James A. Harrell ◽  
Abdelrahman Ali Mohamed
Keyword(s):  
Sedimentary Rocks ◽  
Raw Material ◽  
Metamorphic Rocks ◽  
Nile River ◽  
Surficial Sediments ◽  
Basement Complex ◽  
Nubian Sandstone ◽  
Ornamental Stones ◽  
Sandstone Formation ◽  
Oolitic Ironstone

Nubia is well endowed with the geological resources needed to supply a succession of ancient cultures and kingdoms. Igneous and metamorphic rocks of the region’s Basement Complex provided most of the materials, including gold, copper, gemstones, and a variety of ornamental stones. Overlying the Basement Complex are sedimentary rocks and among these is the Nubian Sandstone Formation, which supplied the material used to build Nubia’s many temples and pyramids. This formation also provided the oolitic ironstone that was the raw material for Kushite iron production as well as two unusually hard varieties of sandstone—iron oxide-cemented ferricrete and quartz-cemented quartzite—that were used in buildings where extra strength was needed and also for many ornamental applications. Surficial sediments deposited by the Nile River and desert wadis were important sources of gold, gemstones, and, for ceramics, clay. A total of 117 ancient mines and quarries have been identified in Nubia with twenty-three for sandstone, seven for ornamental stones, four for quartzite, seventy-six for gold, five for copper, one each for iron and lead, and three for gemstones.

scholarly journals Estimation of the strength of Nubian sandstone formation from point load test index and other simple parameters

2018 ◽  
Vol 149 ◽  
pp. 02024
Author(s):  
Abdul Karim M. Zein ◽  
Mutasim A. Sandal
Keyword(s):  
Water Absorption ◽  
Bulk Density ◽  
Point Load ◽  
Load Test ◽  
Rock Properties ◽  
Engineering Practice ◽  
Nubian Sandstone ◽  
Point Load Test ◽  
Rock Types ◽  
Sandstone Formation

This study investigates the correlation of the uniaxial compressive strength (UCS) and the point load test (PLT) index Is(50), bulk density, water absorption and the RQD properties of the Sudanese Nubian sandstone formation. The UCS being is the rock property needed in engineering practice but its determination is tedious, time consuming and expensive. Alternatively, the UCS may be indirectly evaluated through establishing relationships with rock parameters which are easier, cheaper and more convenient to determine in the laboratory or in the field. An extensive laboratory testing was executed to determine the above rock properties for many NSF samples taken from Khartoum State and other areas. Statistical analysis was performed on the test data and a reliable linear regression equation has been developed with a UCS to PLT Is(50) conversion factor of 10.18 and may be applied to estimate the strength of the Sudanese sandstone formation. The developed correlation is in good agreement with few of the many methods published for similar rock types which indicates that large errors may result in from applying an inappropriate UCS prediction method. Thus, it is important to establish separate correlations or validate published correlations to check their suitability for a specific rock types and local geologies. Useful correlation relationships of reasonable accuracy were also established for rough estimation of the UCS from the bulk density, water absorption and the RQD properties of the Nubian sandstone formation.

scholarly journals DETERMINATION CONVENTIONAL ROCK PROPERTIES FROM LOG DATA & CORE DATA FOR UPPER NUBIAN SANDSTONE FORMATION OF ABU ATTIFEL FIELD

2019 ◽  
Vol 2 (1) ◽  
pp. 29-37
Author(s):  
Adel Alabeed ◽  
Zeyad Ibrahim ◽  
Emhemed Alfandi
Keyword(s):  
Water Saturation ◽  
Rock Properties ◽  
Well Log ◽  
Log Data ◽  
Nubian Sandstone ◽  
Core Data ◽  
Hydrocarbon Reservoir ◽  
Fluid Saturation ◽  
Volume Porosity ◽  
Sandstone Formation

A reservoir is a subsurface rock that has effective porosity and permeability which usually contains commercially exploitable quantity of hydrocarbon. Reservoir characterization is undertaken to determine its capability to both store and transmit fluid. Petrophysical well log and core data, in this paper, were integrated in an analysis of the reservoir characteristics by selecting of three productive wells. The selected wells are located at Abu Attifel field in Libya for Upper Nubian Sandstone formation at depth varied form 12921 to14330 ft. The main aim of this study is to compare the laboratory measurement of core data with that obtained from well log data in order to determine reservoir properties such as shale volume, porosity (Φ), permeability (K), fluid saturation, net pay thickness. The plots of porosity logs and core porosity versus depth for the three wells revealed significant similarity in the porosity values. The average volume of shale for the reservoir was determined to be 22.5%, and average permeability values of the three wells are above 150 md, while porosity values ranged from 9 to 11%. Low water saturation 13 to 22% in the three wells indicates the wettability of the reservoir is water-wet.

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