Delineation of Sandstone Reservoir Flow Zones in the Central Bredasdorp Basin, South Africa, Using Core Samples

2021 ◽  
Author(s):  
Mimonitu Opuwari ◽  
Moses Magoba ◽  
Nehemiah Dominick ◽  
Nicolas Waldmann
Keyword(s):  
South Africa ◽  
Core Samples ◽  
Reservoir Flow ◽  
Sandstone Reservoir

scholarly journals Modern weathering in outcrop samples versus ancient paleoredox information in drill core samples from a Mesoarchaean marine oxygen oasis in Pongola Supergroup, South Africa

2019 ◽  
Vol 265 ◽  
pp. 330-353 ◽  
Author(s):  
Gülüm Albut ◽  
Balz S. Kamber ◽  
Annika Brüske ◽  
Nicolas J. Beukes ◽  
Albertus J.B. Smith ◽  
...  
Keyword(s):  
South Africa ◽  
Drill Core ◽  
Core Samples

Experience of Surfactant-Polymer Flooding Simulation on a Sandstone Reservoir

2021 ◽  
Author(s):  
Alexey Kudryashov ◽  
Kiryl Karseka ◽  
Denis Mityurich ◽  
Vasilii Lompik ◽  
Alexander Cheremisin ◽  
...  
Keyword(s):  
Laboratory Experiments ◽  
3D Model ◽  
3D Models ◽  
Polymer Flooding ◽  
Efficiency Evaluation ◽  
Pilot Site ◽  
Core Samples ◽  
1D Model ◽  
Sandstone Reservoir ◽  
Physical And Chemical

Abstract The aim of the work is to create representative 1D- and 3D-models of surfactant-polymer flooding, considering the most significant physical and chemical phenomena that occur during this process, and further efficiency evaluation of the method. The paper describes approaches to reproduce and verify laboratory experiments results of recovery factor increase during surfactant-polymer flooding on core samples using 1D-model, as well as approaches to optimize the compositions and injection schemes of chemicals during the efficiency evaluation of the technology on a 3D-model of the pilot site.

Use of field portable XRF in exploration of PGE-enriched zones in the Pilanesberg PGE deposit, Bushveld Complex, South Africa

2020 ◽  
pp. geochem2020-075
Author(s):  
A.K. Somarin ◽  
Ingo Steinhage
Keyword(s):  
South Africa ◽  
Bushveld Complex ◽  
Precious Metals ◽  
Ore Deposits ◽  
Ease Of Use ◽  
Portable Xrf ◽  
Laboratory Methods ◽  
Core Samples ◽  
Low Concentrations

The field-portable X-ray fluorescence (FPXRF) spectrometer has evolved significantly in the last decade and became one of the most innovative tools for field geologists. Portability and ease of use of FPXRF systems have opened up new and unique applications for even novice technicians. Application of FPXRF in precious metals exploration and mining appears to be challenging due to their low concentrations (lower than detection limit by FPXRF) in nature and even in most ore deposits. This case study shows the success of FPXRF in identifying anomalous zones of platinum group elements (PGE) and Au (target elements) using pathfinder elements in the Pilanesberg PGE deposit, Bushveld Complex, South Africa. Sixty-three core samples were analyzed using both FPXRF and laboratory methods. In these samples, Pt < 8ppm, Pd <5 ppm, and Au <1 ppm which were not detected by FPXRF; however, Ni and Cu are up to 6540 and 3560 ppm, respectively, which were easily detected by FPXRF. These elements show positive correlation with the precious metals indicating that they can be used as pathfinder. Both direct-shot analyses of core samples and their pulverized specimen assays show correlation with lab assay data suggesting that both methods can be used in the field; however, the accuracy of direct-shot data is lower due to heterogeneity of samples.

scholarly journals Geothermal Energy from the Main Karoo Basin (South Africa): An Outcrop Analogue Study of Permian Sandstone Reservoir Formations

2016 ◽  
Vol 97 ◽  
pp. 186-193 ◽  
Author(s):  
Stuart A. Campbell ◽  
Nils Lenhardt ◽  
Matthys A. Dippenaar ◽  
Annette E. Götz
Keyword(s):  
South Africa ◽  
Geothermal Energy ◽  
Karoo Basin ◽  
Analogue Study ◽  
Sandstone Reservoir

scholarly journals Modeling the Depositional Environment of the Sandstone Reservoir in the Middle Miocene Sidri Member, Badri Field, Gulf of Suez Basin, Egypt: Integration of Gamma-Ray Log Patterns and Petrographic Characteristics of Lithology

2020 ◽  
Author(s):  
Ahmed E. Radwan
Keyword(s):  
Depositional Environment ◽  
Middle Miocene ◽  
Gamma Ray ◽  
Hydrocarbon Reservoirs ◽  
Gulf Of Suez ◽  
Hydrocarbon Reservoir ◽  
Core Samples ◽  
Phase Cycle ◽  
Sandstone Reservoir ◽  
Depositional Setting

Abstract Understanding the depositional setting of siliciclastics reservoir is fundamental process to exploration and development of hydrocarbon reservoirs and to the multi-phase cycle of the oil and gas industry. Typically, core samples from existing or potential reservoirs can be used for interpretation of depositional environment. However, the lack of core samples in certain reservoirs represents a challenge for reservoir development plans and further exploration. To overcome the absence of core samples in the middle Miocene Sidri Member in the Badri field, Gulf of Suez, this study aimed to reconstruct its depositional settings by coupling well logging patterns and petrographic characterization of ditch cuttings. Consequently, 30 thin section samples representing the reservoir section of four wells were described in detail and standard petrographic characteristics were determined. Then, gamma-ray (GR) log patterns of the studied reservoir wells were used for interpretation of depositional environment. Petrographic analysis indicates that the sandstone reservoir is fine- to medium-grained arkose with dominant siliceous cement and composed mainly of quartz, feldspars, and lithic fragments. Pores reflecting primary and secondary porosity as well as inter-granular pores are dominant. The facies analysis indicates that the studied member has a heterogeneous nature and rapid facies change; its main lithofacies are blocky sandstones, intercalated sandstones and shales, and shales. Three electrofacies were interpreted in the studied section: (1) electrofacies-A (blocky sandstones), which is characterized by a cylindrical-shaped (right boxcar) GR trend; (2) electrofacies-B (intercalated sandstones and shales), which is characterized by an irregular log trend with serrated shape; and (3) electrofacies-C (shales), which is characterized by irregular GR trend and has no character. The interpreted results indicate a tidal channel depositional setting for electrofacies-A, mixed tidal flat depositional setting for electrofacies-B, and low relief offshore mudstone depositional setting for electrofacies-C. Finally, the results illustrate how the coupling of GR patterns with the analysis of petrographic characteristics can be used to understand the depositional setting of a hydrocarbon reservoir that lacks core samples. This work could be useful for assessment of reservoir distribution and quality, for reduction of uncertainty during field development, as well as for providing useful insight to similar hydrocarbon reservoirs elsewhere.

Study on Fluid Solid Coupling of Horizontal Wells in Bottom Water Sandstone Reservoir

2013 ◽  
Vol 827 ◽  
pp. 239-243
Author(s):  
Jia Ming Zhang ◽  
Xiao Dong Wu ◽  
Zhuang Zhang ◽  
Han Han Zhang ◽  
Jia Zhang ◽  
...  
Keyword(s):  
Bottom Water ◽  
Water Reservoir ◽  
Coupled Model ◽  
Horizontal Wells ◽  
Well Completion ◽  
Reservoir Flow ◽  
Wellbore Pressure ◽  
Methodological Errors ◽  
The Laplace Transform ◽  
Sandstone Reservoir

In the development of bottom water sandstone reservoir, the utilization of horizontal wells is economical and reliable but also can delay the bottom water coning and it has the advantages over the conventional vertical wells .The methods adopted in the past have methodological errors. This paper regards the reservoir flow and wellbore flow of horizontal well as a interactional system which considers the fluid friction, momentum change, the mixed interference of wellbore wall inflows and other complex factors and obtains Laplace space solution by using the Laplace transform to establish the coupled model of wellbore pressure drop calculation. It can provide more advanced means for reservoir engineering studies, well completion and production engineering design of horizontal wells on the conditions of bottom water reservoir.

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