Organic Petrographic and Geochemical Evaluation of the Black Shale of the Duwi Formation, El Sebaiya, Nile Valley, Egypt

El‐Anwar, Esmat A. Abou; Salman, Salman; Mousa, Doaa A.; Aita, Sami; Makled, Walid A.; Gentzis, Thomas

doi:10.3390/min11121416

Cited by 8 publications

(2 citation statements)

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“…The study also in volved palynological and geochem i cal re search. Such re search pro ce dures are com monly ap plied to de ter mine both the hy dro car bon po ten tial and the depositional en vi ron ments of po ten tial source rocks (Carvajal-Ortiz and Gentzis, 2018;Ndip et al, 2019;Deaf et al, 2020;Körmösa et al, 2020;Mansour et al, 2020;Mohamed et al, 2020;Abou El-Anwar et al, 2021). We in clude a dis cus sion of re la tion ships be tween the con tent and types of macerals, palynofacies and Rock-Eval data for de ter mi na tion of the hydro car bon po ten tial of the Anthracosia Shales.…”

Section: Introductionmentioning

confidence: 93%

Petrographic, palynological and geochemical recognition of dispersed organic matter in the black Anthracosia Shales (Sudetes, south-west Poland)

NOWAK¹,

GÓRECKA-NOWAK²,

Karcz

2022

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As so ci ate Ed i tor: Dariusz Wiêc³aw We de scribe the or ganic pe trog ra phy, palynology and Rock-Eval py rol y sis val ues of lac us trine black shales termed the Anthracosia Shales (Up per Car bon if er ous/Lower Perm ian) in the Intrasudetic Ba sin (Sudetes, SW Po land). Sam ples were taken from cores of two bore holes: Rybnica Leoena PIG 1 and OEcinawka OErednia PIG 1. Maceral com po si tion, miospore assem blage com po si tion, palynofacies and geo chem i cal char ac ter is tics of dis persed or ganic mat ter in the Anthracosia Shales were used to de ter mine con di tions of the en vi ron ment and to eval u ate their pe tro leum po ten tial. Data from both or ganic petrog ra phy and palynology anal y ses en abled rec og ni tion of three broadly dis tinct or ganic as so ci a tions in these shales: bi tu minous, humic, and in ter me di ate, while Rock-Eval py rol y sis re vealed the pres ence of bi tu mi nous and humic kerogen types I and III. Type I cor re sponds to the bi tu mi nous as so ci a tion, with amor phous or ganic mat ter (AOM) dom i nant in the palynofacies, and type III cor re sponds to the humic as so ci a tion with phytoclasts pre vail ing in the palynofacies. The ther mal ma tu rity of the or ganic mat ter is de ter mined by the val ues of: (1) vitrinite reflectance V Ro = 0.53-0.73%, (2) palynomorph 3-4 col our in dex, and (3) T max = 443-447°C, which in di cate oil win dow ma tu rity. Some of the TOC re sults (1.6-2.9 wt.%) in di cate that the Anthracosia Shales are good and very good pe tro leum source rocks, though the thick ness of this in ter val is low (4-5 m). Shales with TOC val ues <0.5 wt.% pre vail, and may be classifed as poor source rocks.

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Section: Introductionmentioning

confidence: 93%

Petrographic, palynological and geochemical recognition of dispersed organic matter in the black Anthracosia Shales (Sudetes, south-west Poland)

NOWAK¹,

GÓRECKA-NOWAK²,

Karcz

2022

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“…Wellbore instability caused by physicochemical causes is most commonly associated with shale rocks due to their high clay mineral content and extremely low permeability [14][15][16]. Shale is usually composed of the following minerals: quartz, calcite, and clay from the smectite group (mostly montmorillonite), illite, chlorite, and kaolinite in varying proportions [3,17,18]. In shale, which comprises a significant amount of clay in its composition, hydration can occur during the drilling of this formation, which is a significant obstacle to successful well construction.…”

Section: Introductionmentioning

confidence: 99%

Green Approach in Water-Based Drilling Mud Design to Increase Wellbore Stability

et al. 2022

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Wellbore instability is one of the most serious problems that can occur during drilling, mainly during drilling oil or gas wells through rocks that contain a higher proportion of clay, such as shales. To prevent wellbore instability, oil companies apply different approaches to strengthen wellbore walls, and use different shale swelling inhibitors. The aim of this research was to apply a green approach and the concept of the circular economy in mud design, and to determine whether mandarin peel powder, which is a waste material, can be used as an inhibitor of shale swelling. For that purpose, pellets consisting of bentonite and quartz in a 50:50 ratio were prepared using a compactor, and bentonite-based drilling mud (BM) with and without mandarin peel powder in concentrations of 0.5, 1, 1.5 and 2% by volume of water. The swelling of quartz–bentonite pellets after 2 and 24 h in each drilling-mud sample was determined at room temperature and 90 °C using a linear swell meter. On the basis of laboratory research, we concluded that increasing the concentration of mandarin peel powder reduces pellet swelling. By adding mandarin peel powder particles between 0.1 and 0.16 mm to the base mud at a concentration of 2% by volume of water, the following was achieved: 44% reduction in API filtration, 61.54% reduction in PPT filtration, 45% reduction in pellet swelling after 24 h at room temperature, and 48.6% reduction of pellet swelling after 24 h at 90 °C.

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Geochemical and mineralogical analysis of the Upper Cretaceous dolomitic phosphates at Queih Mine, Quseir, Central Eastern Desert, Egypt: depositional environment implications and pollution indices

Abou El‑Anwar,

Belal,

Salman

et al. 2023

Carbonates Evaporites

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Soon for the security of phosphorus world supply, which comes primarily from non-renewable sources, the moderate carbonate phosphates will need further geochemical multidiscipline investigations to participate in the phosphorous supply chains necessary to increase human productivity. Dolomitic phosphates represented the main carbonate phosphate rocks of the Upper Member of Duwi Formation, at Um Queih Mine, South-Western Quseir, that phosphate can be classified as intermediate grade phosphate ore. It was enriched in V, Ni, Mo, U, Cu, Cr, Cd, Co as well as Zn and their ratios indicated that the deposition occurred in anoxic environment (reducing conditions). Mineralogical investigations indicated that the studied phosphorites are composed of two main mineral phases; fluorapatite and non-phosphatic minerals (dolomite, calcite, pyrite, gypsum, and quartz). The petrographic examination revealed that these phosphorites are composed of phosphatic lithoclasts, phosphatic bioclasts, opaques, and quartz grains embedded in a cryptocrystalline phosphatic matrix. The parent rocks of the studied phosphorites represented by basaltic mafic provenance were affected by low chemical weathering and deposited under marine anoxic environment. The mineralogical and geochemical characteristics indicated that the studied phosphorites deposited in marine anoxic condition. The weathering of these rocks can be harmful to the surrounding environment owing to its content of pyrite and potentially toxic elements (PTEs), the EF (enrichment factor) gives extremely high enriched with Mo, Cd, and Se.

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Organic Petrographic and Geochemical Evaluation of the Black Shale of the Duwi Formation, El Sebaiya, Nile Valley, Egypt

Cited by 8 publications

References 44 publications

Petrographic, palynological and geochemical recognition of dispersed organic matter in the black Anthracosia Shales (Sudetes, south-west Poland)

Petrographic, palynological and geochemical recognition of dispersed organic matter in the black Anthracosia Shales (Sudetes, south-west Poland)

Green Approach in Water-Based Drilling Mud Design to Increase Wellbore Stability

Geochemical and mineralogical analysis of the Upper Cretaceous dolomitic phosphates at Queih Mine, Quseir, Central Eastern Desert, Egypt: depositional environment implications and pollution indices

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