Hamed Alrefaee - Profile on Academia.edu (original) (raw)
Papers by Hamed Alrefaee
Meers fault is mostly due to the Late Paleozoic movement, which juxtaposed Early Cambrian igneous... more Meers fault is mostly due to the Late Paleozoic movement, which juxtaposed Early Cambrian igneous rocks against Cambrian-Ordovician carbonate rocks. The magnetic expression of the Meers fault suggests that the fault can be traced in the subsurface for 21 km southeastward further beyond the clearly defined scarp and for 51 km northwestward where it branches and strikes more northerly. Thus, its total subsurface xiii xiv extension is ~95 km. The seismic data provide impressive images of the structural complexity of the Wichita Thrust Front, and suggest that the Meers fault is a deepseated high-angle thrust fault.
Structural and stratigraphic controls on the geothermal regime of the Gulf of Suez, Egypt as revealed by the geophysical and bottom-hole temperature data
Egyptian Journal of Geology, May 1, 2022
Mapping of groundwater prospective zones integrating remote sensing, geographic information systems and geophysical techniques in El-Qaà Plain area, Egypt
Hydrogeology Journal, 2017
The geospatial mapping of groundwater prospective zones is essential to support the needs of loca... more The geospatial mapping of groundwater prospective zones is essential to support the needs of local inhabitants and agricultural activities in arid regions such as El-Qaà area, Sinai Peninsula, Egypt. The study aims to locate new wells that can serve to cope with water scarcity. The integration of remote sensing, geographic information systems (GIS) and geophysical techniques is a breakthrough for groundwater prospecting. Based on these techniques, several factors contributing to groundwater potential in El-Qaà Plain were determined. Geophysical data were supported by information derived from a digital elevation model, and from geologic, geomorphologic and hydrologic data, to reveal the promising sites. All the spatial data that represent the contributing factors were integrated and analyzed in a GIS framework to develop a groundwater prospective model. An appropriate weightage was specified to each factor based on its relative contribution towards groundwater potential, and the resulting map delineates the study area into five classes, from very poor to very good potential. The very good potential zones are located in the Quaternary deposits, with flat to gentle topography, dense lineaments and structurally controlled drainage channels. The groundwater potential map was tested against the distribution of groundwater wells and cultivated land. The integrated methodology provides a powerful tool to design a suitable groundwater management plan in arid regions.RésuméLa cartographie géospatiale de zones à potentiel aquifère est. essentielle pour satisfaire les besoins en eau des habitants et de l’agriculture dans des régions arides telle que la région d’El-Qaà, Péninsule du Sinai, Egypte. L’étude vise à identifier des secteurs pour forer de nouveaux puits pouvant pallier à la rareté de l’eau. L’intégration de la télédétection, des systèmes d’information géographique (SIG) et des techniques géophysiques constitue une avancée dans la prospection de l’eau souterraine. Sur la base de ces techniques, plusieurs paramètres d’évaluation du potentiel en eau souterraine de la plaine El-Qaà ont été identifiés. Afin de mettre en évidence des sites prometteurs, les données géophysiques se sont appuyées sur des informations déduites d’un modèle altimétrique numérique, et sur des données géologiques, géomorphologiques et hydrologiques. Toutes les données spatiales qui représentent les facteurs contributifs ont été intégrées et analysées dans le cadre d’un SIG pour élaborer un modèle prospectif des eaux souterraines. Une pondération appropriée a été appliquée à chaque facteur sur la base de sa contribution relative vis à vis du potentiel en eau souterraine, et la carte résultante permet de délimiter l’aire d’étude en 5 classes de très faible à très bon potentiel. Les zones à très bon potentiel sont localisées dans les dépôts quaternaires présentant une topographie plate ou douce, des linéaments denses et des chenaux structuraux de drainage. La carte du potentiel en eaux souterraines a été testée en la confrontant à la distribution des puits et terres cultivées. La méthodologie intégrée fournit un outil puissant pour concevoir un plan de gestion de l’eau souterraine adapté aux régions arides.ResumenEl mapeo geoespacial de potenciales zonas de aguas subterráneas es esencial para apoyar las necesidades de los habitantes locales y las actividades agrícolas en regiones áridas, como es el área de El-Qaà, Península del Sinaí, Egipto. El estudio tiene como objetivo localizar nuevos pozos que puedan servir para afrontar la escasez de agua. La integración de la teledetección, los sistemas de información geográfica (SIG) y las técnicas geofísicas es un avance para la prospección de agua subterránea. En base a estas técnicas, se determinaron varios factores que contribuyen a conocer el potencial de agua subterránea en la llanura de El-Qaà. Los datos geofísicos fueron apoyados por la información derivada de un modelo de elevación digital, para revelar los sitios más promisorios a partir de datos geológicos, geomorfológicos e hidrológicos. Todos los datos espaciales que representan estos factores se integraron y analizaron en un marco SIG para desarrollar un modelo del potencial del agua subterránea. Se especificó un peso apropiado para cada factor, basado en su contribución relativa al potencial del agua subterránea, y el mapa resultante delimita el área de estudio en cinco clases, desde un potencial muy pobre hasta muy bueno. Las potenciales zonas muy buenas se localizan en los depósitos cuaternarios, con topografía plana a suave, lineamientos densos y canales de drenaje estructuralmente controlados. El mapa de potencial de aguas subterráneas se probó contra la distribución de pozos de agua subterránea y tierras cultivadas. La metodología integrada proporciona una herramienta poderosa para diseñar un plan adecuado de manejo del agua subterránea en regiones…
Structural and stratigraphic controls on the geothermal regime of the Gulf of Suez, Egypt as revealed by the geophysical and bottom-hole temperature data
Egyptian Journal of Geology
Journal of Petroleum Science and Engineering, Aug 1, 2018
We used high-resolution 3D seismic data and applied seismic attribute analysis to geometrically i... more We used high-resolution 3D seismic data and applied seismic attribute analysis to geometrically interpret and characterize the polygonal fault systems in the Paleocene-Eocene sequence of the Rankin Platform Sub-basin, Northern Carnarvon Basin, Australia. The polygonal faults were identified in a stratigraphic sequence dominated by calcareous clay with minor calcilutite at its lower section that changes to argillaceous calcilutite and calcareous claystone at its upper section. Seismic sections and time slices, through multi-attribute (coherence, energy ratio similarity, and curvature) volumes display a dense distribution of normal faults with polygonal shape and small throws in the plain view. The polygonal fault systems (PFS) exist in two well-defined tiers, which can act as pathways for the fluid flow migration. The first tier coincides with the upper section (Early-Middle Eocene Wilcox Formation) with a few faults and the second one coincides with the lower section of the sequence (Paleocene Lambert and Dockrell formations) with a greater number of faults. Proper understanding and interpretation of the polygonal fault systems as non-tectonic extensional faults are a critical issue in assessing the migration pathway for hydrocarbon (gas) through the Paleocene-Eocene sequence in the Northern Carnarvon Basin, and elsewhere in the world.
Deducing the structural framework of the Southern Faghur-Siwa Basin, northern Western Desert, Egypt using potential field data
Journal of African Earth Sciences
Interpretation of the subsurface tectonic setting of the Natrun Basin, north Western Desert, Egypt using Satellite Bouguer gravity and magnetic data
Journal of African Earth Sciences, 2022
Bulletin of Engineering Geology and the Environment, 2018
The spatial prediction of landslide susceptibility locations is a crucial task to support risk ma... more The spatial prediction of landslide susceptibility locations is a crucial task to support risk management and development plans in mountainous areas, such as El-Qaá area. The study aims to delineate landslide-susceptible zones that can cause enormous damage to property, infrastructure, and loss of life. An innovative integrated approach using remote sensing, geographic information systems, and geophysical techniques was used in the current work to evaluate landslide susceptibility locations. Magnetic data were supported by information derived from geologic, geomorphologic, topographic, and seismic data to reveal the landslidesprone zones. Several factors contributing to landslide susceptibility in El-Qaá area were determined, such as distance to faults, lithology, stream power index, slope, density of earthquake events, distance to epicenters, tilt derivative of magnetic data, distance to drainages, aspect, and topographic wetness index. A unique landslide susceptibility model (LSM) was developed in this study by integration all the spatial data that represent the contributing factors. The bivariate statistical index method was constructed to assign logic ranks and weights for the causative factors and their classes representing their realistic relations with landslide susceptibility in El-Qaá area. The landslide susceptibility map classifies El-Qaá area into five relative susceptibility zones: very high, high, moderate, low, and very low. The very high-and high-susceptibility zones are distributed in the eastern side of El-Qaá area where structurally controlled channels, steep topography to downhill lands, and Precambrian basement rocks are located. The resulting susceptibility map was tested and validated using the landslide locations that were delineated from field survey and satellite images at high resolution. The integrated methodology shows a more realistic landslide susceptibility map and adds a powerful tool to design a fruitful management plan in mountainous areas.
Egyptian Journal of Geology
HE PRESENT study intends to elicit subsurface shear (wrench) zones that affected the northeastern... more HE PRESENT study intends to elicit subsurface shear (wrench) zones that affected the northeastern part of Sirt Basin area, which is considered as one of the most important hydrocarbons-producing regions, and its impact on similar areas around the world. Several techniques have been carried on gravityand magnetic data to achieve this goal, such as least squares, tilt angle derivative, horizontal gradient, and sourceedge detection. In addition, power spectrum and Euler deconvolution methods have been carried out with a view to depict clearly faulting pictures along successive depths of deep-seated structures. 2D modelling has been constructed along two profiles and with the aid of data available from four drilled wells in the study area. New eleven sets of wrench zones that have not been extracted before could be revealed from the interpreted tectonic map and faulting pictures of the study area, mostly of sinistral and dextral strike-slip movements. Also, these zones were traced on six successive levels to know whether they are superficial or deep. Seven sets were revealed from gravity data and six from RTP data. Two sets of shears traced from gravity coincide with two shears from the RTP map. Some of these zones intersect with each other. These intersection points weakened the Earth's crust which in turn becomes tectonically unstable in this area. These wrench zones are predicted to be due to tectonic movements of the Arabian and African plates and additionally the ensuing East African Rift which led the Megashear System of North Africa to reactivate in a dextral strike-slip pattern. Sinistral transtensional reactivationsalong the northwest faults resulted due dextral reactivation of the Megashear System of North Africa.
Journal of African Earth Sciences, 2017
The Bouguer anomaly map of the central part of the Northern Western Desert, Egypt was used to con... more The Bouguer anomaly map of the central part of the Northern Western Desert, Egypt was used to construct six 2D gravity models to investigate the nature, physical properties and structures of the crust and upper mantle. The crustal models were constrained and constructed by integrating results from different geophysical techniques and available geological information. The depth to the basement surface, from eight wells existed across the study area, and the depth to the Conrad and Moho interfaces as well as physical properties of sediments, basement, crust and upper mantle from previous petrophysical and crustal studies were used to establish the gravity models. Euler deconvolution technique was carried on the Bouguer anomaly map to detect the subsurface fault trends. Edge detection techniques were calculated to outlines the boundaries of subsurface structural features. Basement structural map was interpreted to reveal the subsurface structural setting of the area. The crustal models reveals increasing of gravity field from the south to the north due to northward thinning of the crust. The models reveals also deformed and rugged basement surface with northward depth increasing from 1.6 km to 6 km. In contrast to the basement, the Conrad and Moho interfaces are nearly flat and get shallower northward where the depth to the Conrad or the thickness of the upper crust ranges from 18 km to 21 km while the depth to the Moho (crustal thickness) ranges from 31.5 km to 34 km. The crust beneath the study area
Sequence stratigraphic analysis and depositional evolution of the Upper Cretaceous deposits in Ras Budran oil field, Gulf of Suez, Egypt
Arabian Journal of Geosciences, 2021
The Upper Cretaceous deposits represent significant oil reservoirs in several fields of the Gulf ... more The Upper Cretaceous deposits represent significant oil reservoirs in several fields of the Gulf of Suez province, Egypt. The present work aims to study these sediments in Ras Budran oil field in view of sequence stratigraphic analysis. Five third-order depositional sequences were determined for the Upper Cretaceous section in Ras Budran field depending on the analysis and interpretation of the integrated well logging and biostratigraphic datasets. The five sequences are separated by six sequence boundaries and were classified into their systems tracts signifying several sedimentation patterns of progradation and retrogradation. The first depositional sequence corresponds to the Cenomanian-early Turonian Raha and Abu Qada formations classifying into transgressive and highstand systems tracts. The second sequence comprises the Late Turonian Wata Formation subdividing into transgressive and highstand systems tracts. The third sequence embraces the Coniacian–Santonian Matulla Formation subdividing into lowstand, transgressive, and highstand systems tracts. The fourth and fifth depositional sequences coincide with the Campanian-Maastrichtian Brown limestone and Sudr Chalk marking transgressive and highstand systems tracts. The well-documented Maastrichtian-Paleocene boundary marks the last sequence boundary at the top of the studied succession and is strongly controlled by synsedimentary tectonics associated with the Syrian Arc tectonism. The Late Cretaceous depositional history at Ras Budran field was dominated by relative sea level fluctuations. The rising in relative sea level was controlled by the global sea level rise together with basin subsidence, whereas the drop in relative sea level was controlled by the basin filling.
International Journal of Geophysics, 2014
Seismic reflection techniques show an imperative role in imaging complex geological structures an... more Seismic reflection techniques show an imperative role in imaging complex geological structures and are becoming more acceptable as data interpreting tools in 2D/3D view. These subsurface geological structures provide complex seismic signature due to their geometrical behavior. Consequently, it is extremely difficult to interpret these seismic sections in terms of subsurface configuration. The main goal of this paper is to introduce seismic attributes as a powerful tool to interpret complex geological structures in different geological settings. In order to image these complex geological features, multiple seismic attributes such as coherence and curvature have been applied to the seismic data generated over the Shushan Basin (Egypt) and Arkoma Basin (USA). Each type of geological structure event usually generates a unique seismic “signature” that we can recognize and identify by using these seismic attributes. In Shushan Basin (Egypt), they provide a framework and constraint during ...
NRIAG Journal of Astronomy and Geophysics, 2016
Potential field data of the area east of Abu Gharadig basin were used to delineate the tectonic f... more Potential field data of the area east of Abu Gharadig basin were used to delineate the tectonic framework of probable economic interest and for future development plans for the area. To achieve this goal, the RTP and Bouguer gravity maps of the study area were subjected to several filtering and processing techniques. The regional magnetic map shows NE-SW high regional magnetic trends at the northwestern and southeastern parts as well as low magnetic trends at the central part reflecting thick non-magnetized sediments and/or deep highly magnetized basement rocks. Similarly, the regional gravity map shows NE-SW diagonal high and low gravity trends across the entire area of study as well as a distinct increase of gravity values toward the northwest corner reflecting thickening of sedimentary cover and/or deepening of denser basement rock at the central part. The residual maps reveal many anomalies of shallow sources with different polarities, amplitudes and extensions in the form of alternating high and low gravity and magnetic indicating that the basement rocks are dissected by faults forming uplifted and downthrown blocks.
Meers fault is mostly due to the Late Paleozoic movement, which juxtaposed Early Cambrian igneous... more Meers fault is mostly due to the Late Paleozoic movement, which juxtaposed Early Cambrian igneous rocks against Cambrian-Ordovician carbonate rocks. The magnetic expression of the Meers fault suggests that the fault can be traced in the subsurface for 21 km southeastward further beyond the clearly defined scarp and for 51 km northwestward where it branches and strikes more northerly. Thus, its total subsurface xiii xiv extension is ~95 km. The seismic data provide impressive images of the structural complexity of the Wichita Thrust Front, and suggest that the Meers fault is a deepseated high-angle thrust fault.
Structural and stratigraphic controls on the geothermal regime of the Gulf of Suez, Egypt as revealed by the geophysical and bottom-hole temperature data
Egyptian Journal of Geology, May 1, 2022
Mapping of groundwater prospective zones integrating remote sensing, geographic information systems and geophysical techniques in El-Qaà Plain area, Egypt
Hydrogeology Journal, 2017
The geospatial mapping of groundwater prospective zones is essential to support the needs of loca... more The geospatial mapping of groundwater prospective zones is essential to support the needs of local inhabitants and agricultural activities in arid regions such as El-Qaà area, Sinai Peninsula, Egypt. The study aims to locate new wells that can serve to cope with water scarcity. The integration of remote sensing, geographic information systems (GIS) and geophysical techniques is a breakthrough for groundwater prospecting. Based on these techniques, several factors contributing to groundwater potential in El-Qaà Plain were determined. Geophysical data were supported by information derived from a digital elevation model, and from geologic, geomorphologic and hydrologic data, to reveal the promising sites. All the spatial data that represent the contributing factors were integrated and analyzed in a GIS framework to develop a groundwater prospective model. An appropriate weightage was specified to each factor based on its relative contribution towards groundwater potential, and the resulting map delineates the study area into five classes, from very poor to very good potential. The very good potential zones are located in the Quaternary deposits, with flat to gentle topography, dense lineaments and structurally controlled drainage channels. The groundwater potential map was tested against the distribution of groundwater wells and cultivated land. The integrated methodology provides a powerful tool to design a suitable groundwater management plan in arid regions.RésuméLa cartographie géospatiale de zones à potentiel aquifère est. essentielle pour satisfaire les besoins en eau des habitants et de l’agriculture dans des régions arides telle que la région d’El-Qaà, Péninsule du Sinai, Egypte. L’étude vise à identifier des secteurs pour forer de nouveaux puits pouvant pallier à la rareté de l’eau. L’intégration de la télédétection, des systèmes d’information géographique (SIG) et des techniques géophysiques constitue une avancée dans la prospection de l’eau souterraine. Sur la base de ces techniques, plusieurs paramètres d’évaluation du potentiel en eau souterraine de la plaine El-Qaà ont été identifiés. Afin de mettre en évidence des sites prometteurs, les données géophysiques se sont appuyées sur des informations déduites d’un modèle altimétrique numérique, et sur des données géologiques, géomorphologiques et hydrologiques. Toutes les données spatiales qui représentent les facteurs contributifs ont été intégrées et analysées dans le cadre d’un SIG pour élaborer un modèle prospectif des eaux souterraines. Une pondération appropriée a été appliquée à chaque facteur sur la base de sa contribution relative vis à vis du potentiel en eau souterraine, et la carte résultante permet de délimiter l’aire d’étude en 5 classes de très faible à très bon potentiel. Les zones à très bon potentiel sont localisées dans les dépôts quaternaires présentant une topographie plate ou douce, des linéaments denses et des chenaux structuraux de drainage. La carte du potentiel en eaux souterraines a été testée en la confrontant à la distribution des puits et terres cultivées. La méthodologie intégrée fournit un outil puissant pour concevoir un plan de gestion de l’eau souterraine adapté aux régions arides.ResumenEl mapeo geoespacial de potenciales zonas de aguas subterráneas es esencial para apoyar las necesidades de los habitantes locales y las actividades agrícolas en regiones áridas, como es el área de El-Qaà, Península del Sinaí, Egipto. El estudio tiene como objetivo localizar nuevos pozos que puedan servir para afrontar la escasez de agua. La integración de la teledetección, los sistemas de información geográfica (SIG) y las técnicas geofísicas es un avance para la prospección de agua subterránea. En base a estas técnicas, se determinaron varios factores que contribuyen a conocer el potencial de agua subterránea en la llanura de El-Qaà. Los datos geofísicos fueron apoyados por la información derivada de un modelo de elevación digital, para revelar los sitios más promisorios a partir de datos geológicos, geomorfológicos e hidrológicos. Todos los datos espaciales que representan estos factores se integraron y analizaron en un marco SIG para desarrollar un modelo del potencial del agua subterránea. Se especificó un peso apropiado para cada factor, basado en su contribución relativa al potencial del agua subterránea, y el mapa resultante delimita el área de estudio en cinco clases, desde un potencial muy pobre hasta muy bueno. Las potenciales zonas muy buenas se localizan en los depósitos cuaternarios, con topografía plana a suave, lineamientos densos y canales de drenaje estructuralmente controlados. El mapa de potencial de aguas subterráneas se probó contra la distribución de pozos de agua subterránea y tierras cultivadas. La metodología integrada proporciona una herramienta poderosa para diseñar un plan adecuado de manejo del agua subterránea en regiones…
Structural and stratigraphic controls on the geothermal regime of the Gulf of Suez, Egypt as revealed by the geophysical and bottom-hole temperature data
Egyptian Journal of Geology
Journal of Petroleum Science and Engineering, Aug 1, 2018
We used high-resolution 3D seismic data and applied seismic attribute analysis to geometrically i... more We used high-resolution 3D seismic data and applied seismic attribute analysis to geometrically interpret and characterize the polygonal fault systems in the Paleocene-Eocene sequence of the Rankin Platform Sub-basin, Northern Carnarvon Basin, Australia. The polygonal faults were identified in a stratigraphic sequence dominated by calcareous clay with minor calcilutite at its lower section that changes to argillaceous calcilutite and calcareous claystone at its upper section. Seismic sections and time slices, through multi-attribute (coherence, energy ratio similarity, and curvature) volumes display a dense distribution of normal faults with polygonal shape and small throws in the plain view. The polygonal fault systems (PFS) exist in two well-defined tiers, which can act as pathways for the fluid flow migration. The first tier coincides with the upper section (Early-Middle Eocene Wilcox Formation) with a few faults and the second one coincides with the lower section of the sequence (Paleocene Lambert and Dockrell formations) with a greater number of faults. Proper understanding and interpretation of the polygonal fault systems as non-tectonic extensional faults are a critical issue in assessing the migration pathway for hydrocarbon (gas) through the Paleocene-Eocene sequence in the Northern Carnarvon Basin, and elsewhere in the world.
Deducing the structural framework of the Southern Faghur-Siwa Basin, northern Western Desert, Egypt using potential field data
Journal of African Earth Sciences
Interpretation of the subsurface tectonic setting of the Natrun Basin, north Western Desert, Egypt using Satellite Bouguer gravity and magnetic data
Journal of African Earth Sciences, 2022
Bulletin of Engineering Geology and the Environment, 2018
The spatial prediction of landslide susceptibility locations is a crucial task to support risk ma... more The spatial prediction of landslide susceptibility locations is a crucial task to support risk management and development plans in mountainous areas, such as El-Qaá area. The study aims to delineate landslide-susceptible zones that can cause enormous damage to property, infrastructure, and loss of life. An innovative integrated approach using remote sensing, geographic information systems, and geophysical techniques was used in the current work to evaluate landslide susceptibility locations. Magnetic data were supported by information derived from geologic, geomorphologic, topographic, and seismic data to reveal the landslidesprone zones. Several factors contributing to landslide susceptibility in El-Qaá area were determined, such as distance to faults, lithology, stream power index, slope, density of earthquake events, distance to epicenters, tilt derivative of magnetic data, distance to drainages, aspect, and topographic wetness index. A unique landslide susceptibility model (LSM) was developed in this study by integration all the spatial data that represent the contributing factors. The bivariate statistical index method was constructed to assign logic ranks and weights for the causative factors and their classes representing their realistic relations with landslide susceptibility in El-Qaá area. The landslide susceptibility map classifies El-Qaá area into five relative susceptibility zones: very high, high, moderate, low, and very low. The very high-and high-susceptibility zones are distributed in the eastern side of El-Qaá area where structurally controlled channels, steep topography to downhill lands, and Precambrian basement rocks are located. The resulting susceptibility map was tested and validated using the landslide locations that were delineated from field survey and satellite images at high resolution. The integrated methodology shows a more realistic landslide susceptibility map and adds a powerful tool to design a fruitful management plan in mountainous areas.
Egyptian Journal of Geology
HE PRESENT study intends to elicit subsurface shear (wrench) zones that affected the northeastern... more HE PRESENT study intends to elicit subsurface shear (wrench) zones that affected the northeastern part of Sirt Basin area, which is considered as one of the most important hydrocarbons-producing regions, and its impact on similar areas around the world. Several techniques have been carried on gravityand magnetic data to achieve this goal, such as least squares, tilt angle derivative, horizontal gradient, and sourceedge detection. In addition, power spectrum and Euler deconvolution methods have been carried out with a view to depict clearly faulting pictures along successive depths of deep-seated structures. 2D modelling has been constructed along two profiles and with the aid of data available from four drilled wells in the study area. New eleven sets of wrench zones that have not been extracted before could be revealed from the interpreted tectonic map and faulting pictures of the study area, mostly of sinistral and dextral strike-slip movements. Also, these zones were traced on six successive levels to know whether they are superficial or deep. Seven sets were revealed from gravity data and six from RTP data. Two sets of shears traced from gravity coincide with two shears from the RTP map. Some of these zones intersect with each other. These intersection points weakened the Earth's crust which in turn becomes tectonically unstable in this area. These wrench zones are predicted to be due to tectonic movements of the Arabian and African plates and additionally the ensuing East African Rift which led the Megashear System of North Africa to reactivate in a dextral strike-slip pattern. Sinistral transtensional reactivationsalong the northwest faults resulted due dextral reactivation of the Megashear System of North Africa.
Journal of African Earth Sciences, 2017
The Bouguer anomaly map of the central part of the Northern Western Desert, Egypt was used to con... more The Bouguer anomaly map of the central part of the Northern Western Desert, Egypt was used to construct six 2D gravity models to investigate the nature, physical properties and structures of the crust and upper mantle. The crustal models were constrained and constructed by integrating results from different geophysical techniques and available geological information. The depth to the basement surface, from eight wells existed across the study area, and the depth to the Conrad and Moho interfaces as well as physical properties of sediments, basement, crust and upper mantle from previous petrophysical and crustal studies were used to establish the gravity models. Euler deconvolution technique was carried on the Bouguer anomaly map to detect the subsurface fault trends. Edge detection techniques were calculated to outlines the boundaries of subsurface structural features. Basement structural map was interpreted to reveal the subsurface structural setting of the area. The crustal models reveals increasing of gravity field from the south to the north due to northward thinning of the crust. The models reveals also deformed and rugged basement surface with northward depth increasing from 1.6 km to 6 km. In contrast to the basement, the Conrad and Moho interfaces are nearly flat and get shallower northward where the depth to the Conrad or the thickness of the upper crust ranges from 18 km to 21 km while the depth to the Moho (crustal thickness) ranges from 31.5 km to 34 km. The crust beneath the study area
Sequence stratigraphic analysis and depositional evolution of the Upper Cretaceous deposits in Ras Budran oil field, Gulf of Suez, Egypt
Arabian Journal of Geosciences, 2021
The Upper Cretaceous deposits represent significant oil reservoirs in several fields of the Gulf ... more The Upper Cretaceous deposits represent significant oil reservoirs in several fields of the Gulf of Suez province, Egypt. The present work aims to study these sediments in Ras Budran oil field in view of sequence stratigraphic analysis. Five third-order depositional sequences were determined for the Upper Cretaceous section in Ras Budran field depending on the analysis and interpretation of the integrated well logging and biostratigraphic datasets. The five sequences are separated by six sequence boundaries and were classified into their systems tracts signifying several sedimentation patterns of progradation and retrogradation. The first depositional sequence corresponds to the Cenomanian-early Turonian Raha and Abu Qada formations classifying into transgressive and highstand systems tracts. The second sequence comprises the Late Turonian Wata Formation subdividing into transgressive and highstand systems tracts. The third sequence embraces the Coniacian–Santonian Matulla Formation subdividing into lowstand, transgressive, and highstand systems tracts. The fourth and fifth depositional sequences coincide with the Campanian-Maastrichtian Brown limestone and Sudr Chalk marking transgressive and highstand systems tracts. The well-documented Maastrichtian-Paleocene boundary marks the last sequence boundary at the top of the studied succession and is strongly controlled by synsedimentary tectonics associated with the Syrian Arc tectonism. The Late Cretaceous depositional history at Ras Budran field was dominated by relative sea level fluctuations. The rising in relative sea level was controlled by the global sea level rise together with basin subsidence, whereas the drop in relative sea level was controlled by the basin filling.
International Journal of Geophysics, 2014
Seismic reflection techniques show an imperative role in imaging complex geological structures an... more Seismic reflection techniques show an imperative role in imaging complex geological structures and are becoming more acceptable as data interpreting tools in 2D/3D view. These subsurface geological structures provide complex seismic signature due to their geometrical behavior. Consequently, it is extremely difficult to interpret these seismic sections in terms of subsurface configuration. The main goal of this paper is to introduce seismic attributes as a powerful tool to interpret complex geological structures in different geological settings. In order to image these complex geological features, multiple seismic attributes such as coherence and curvature have been applied to the seismic data generated over the Shushan Basin (Egypt) and Arkoma Basin (USA). Each type of geological structure event usually generates a unique seismic “signature” that we can recognize and identify by using these seismic attributes. In Shushan Basin (Egypt), they provide a framework and constraint during ...
NRIAG Journal of Astronomy and Geophysics, 2016
Potential field data of the area east of Abu Gharadig basin were used to delineate the tectonic f... more Potential field data of the area east of Abu Gharadig basin were used to delineate the tectonic framework of probable economic interest and for future development plans for the area. To achieve this goal, the RTP and Bouguer gravity maps of the study area were subjected to several filtering and processing techniques. The regional magnetic map shows NE-SW high regional magnetic trends at the northwestern and southeastern parts as well as low magnetic trends at the central part reflecting thick non-magnetized sediments and/or deep highly magnetized basement rocks. Similarly, the regional gravity map shows NE-SW diagonal high and low gravity trends across the entire area of study as well as a distinct increase of gravity values toward the northwest corner reflecting thickening of sedimentary cover and/or deepening of denser basement rock at the central part. The residual maps reveal many anomalies of shallow sources with different polarities, amplitudes and extensions in the form of alternating high and low gravity and magnetic indicating that the basement rocks are dissected by faults forming uplifted and downthrown blocks.