Gad El-Qady

Followers

Following

Public Views

Interests

Uploads

Papers by Gad El-Qady

Deep heat source detection using the magnetotelluric method and geothermal assessment of the Farafra Oasis, Western Desert, Egypt

Geothermics

Petrophysical Evaluation Using Well logging of the Alam El-Beuib Reservoirs, Shushan Basin, Northern Western Desert, Egypt

Delta Journal of Science

Petrophysical analysis of some of the Lower Cretaceous Alam El-Bueib reservoir units were carried... more Petrophysical analysis of some of the Lower Cretaceous Alam El-Bueib reservoir units were carried out using wireline logs from four wells representing two fields (GEB and APRIES) located in the western part of the Shushan Basin, north Western Desert. Several petrophysical parameters were calculated and used in the subdivision of the studied reservoirs, including shale volume (V SH ), total and effective porosities (PHI T , PHI E ), water saturation (S W ), and hydrocarbon saturation (S H ). Neutron versus density and M-N crossplots indicated that quartzose sandstone is the major matrix component with minor carbonates in some units. Furthermore, the litho-saturation crossplots indicated the existence of oil-bearing intervals, which are frequently associated with quartzose sandstones with low silt and clay content. Dispersed and laminated clays are detrimental to reservoir quality as they block pore spaces, decreasing hydrocarbon storage and flow capacities. Analysis of petrophysical data shows that the studied units have a good reservoir quality, with effective porosity values between 8 and 10 % with an average value 9% and low water saturation values of less than 35%. The most prospective reservoir intervals are found in the upper and middle reservoir units and are recommended for future exploration and development.

Download

Geophysical Study of the Electrical Resistivity at Minami Noshiro Area, Japan

66th EAGE Conference & Exhibition, 2004

ABSTRACT Minami-Noshiro oil field is considered as one of the most important oil fields in Japan.... more ABSTRACT Minami-Noshiro oil field is considered as one of the most important oil fields in Japan. A threedimensional magnetotelluric (MT) survey was conducted in this area by Japan National Oil Corporation (JNOC). In this study the magnetotelluric data have been used to image the electrical conductivity of the subsurface in the study area. The used frequency of the MT data was ranging from 0.00055 to 320 Hz. The study of the dimensionality and directionality of the regional electrical structures

Geophysical Techniques Applied in Archaeology

Natural Science in Archaeology, 2018

With the increased demand to facilitate the archaeological work either in well-known archaeologic... more With the increased demand to facilitate the archaeological work either in well-known archaeological sites or the crude sites, geophysical methods plays an important role. The Geophysical methods have been used since 1946 with increasing frequency for archaeological investigations and currently the branch of archaeogeophysics is widely applied. The wide varieties of geophysical methods applied in archaeological work relies principally upon existing reasonable contrast in physical properties between the buried archaeological feature and the surrounding subsoil. Understanding the archaeological properties of the physical contrasts, in terms of density, thermal conductivity, electrical resistance, magnetic or dielectric properties, remains fundamental issues of choosing and applying the discipline geophysical techniques. In this regard, we tried to introduce a brief outline for the common and applicable techniques in archaeological investigations. The physical principles and field instrumentation involved for the acquisition of data with each method are considered, as well as some common results from the worldwide case studies. Generally, the archeogeophysical survey results can be used to guide excavation and to give archaeologists insight into the patterning of non-excavated parts of the site as well as it is often used where preservation of the sensitive sites is the aim rather than excavation.

Detection of Weak Zones by Inversion of 2-D Electrical Imaging Data Using Neural Network

Near Surface 2005 - 11th European Meeting of Environmental and Engineering Geophysics, 2005

P058 ABSTRACT DETECTION OF WEAK ZONES BY INVERSION OF 2- D ELECTRICAL IMAGING DATA USING NEURAL N... more P058 ABSTRACT DETECTION OF WEAK ZONES BY INVERSION OF 2- D ELECTRICAL IMAGING DATA USING NEURAL NETWORK HO TRONG LONG GAD EL-QADY KEISUKE USHIJIMA Department of Earth Resources Engineering Graduate School of Engineering Kyushu University Hakozaki 6-10-1 Higashi-ku Fukuoka 812-8581 Japan There is increasing interest particularly for environmental and engineering studies of nearsurface areas. Electrical Imaging or electrical tomography is a survey technique developed for the investigation of areas of complex geology where the use of resistivity sounding and other techniques is unsuitable. Inversion techniques of Electrical Imaging data normally done using least-squares method (e.g. Sasaki 1989 1992 Loke et

Integrated Geophysical interpretation for groundwater potentiality: Case study at the central part of Sinai Peninsula, Egypt

EGM 2007 International Workshop, 2007

ABSTRACT

Detection of UXO and Landmines Using 2‐D Modeling of Geoelectrical Resistivity Data

Symposium on the Application of Geophysics to Engineering and Environmental Problems 2005, 2005

Buried landmines pose serious hazard in more than 60 countries across the globe. Recent estimatio... more Buried landmines pose serious hazard in more than 60 countries across the globe. Recent estimations suggest as many as 110 million such objects lay worldwide. Detecting these mines with standard metal detectors is difficult, as many are comprised primarily of plastic, with often only a firing pin as the sole metallic component. The development of geophysical methods for unexploded Ordnance (UXO) detection has been underway for almost ten years, and arose in the international context from the need to rapidly characterizing large areas of potentially UXO-contamination. In this work, the geoelectrical resistivity could be one of the most useful parameters to discriminate ordnance types, shapes and locations especially near the surface. This study represents a successful trial to adopt the geoelectrical resistivity technique for detecting buried UXO and other clutter environmental noise. A forward and inversion routine had been adopted and applied to synthetic resistivity models for different UXO and landmines. In addition, models of non metal ordnance had been used, and were successfully detected. The obtained results show high efficiency of the technique to image those models. Now we are trying to adopt the technique to work in the filed, hence apply it for test site.

Application of artificial neural network to magnetotelluric data. NRIAG Journal of Astronomy and Geophysics

Integrated archaeological exploration using geophysical methods at Futenma area, Okinawa prefecture, Japan

BUTSURI-TANSA(Geophysical Exploration), 2005

Download

Integrated geoelectrical survey for groundwater and shallow subsurface evaluation: case study at Siliyin spring, El-Fayoum, Egypt

International Journal of Earth Sciences, 2009

Siliyin spring is one of the many natural fresh water springs in the Western Desert of Egypt. It ... more Siliyin spring is one of the many natural fresh water springs in the Western Desert of Egypt. It is located at the central part of El-Fayoum Delta, which is a potential place for urban developments and touristic activities. Integrated geoelectrical survey was conducted to facilitate mapping the groundwater resources and the shallow subsurface structures in the area. Twenty-eight transient electromagnetic (TEM) soundings, three vertical electrical soundings (VES) and three electrical resistivity tomography (ERT) profiles were carried out around the Siliyin spring location. The dense cultivation, the rugged topography and the existence of infra structure in the area hindered acquiring more data. The TEM data were inverted jointly with the VES and ERT, and constrained by available geological information. Based on the inversion results, a set of geoelectrical cross-sections have been constructed. The shallow sand to sandy clay layer that forms the shallow aquifer has been completely mapped underneath and around the spring area. Flowing of water from the Siliyin spring is interconnected with the lateral lithological changes from clay to sand soil. Exploration of the extension of Siliyin spring zone is recommended. The interpretation emphasizes the importance of integrating the geoelectrical survey with the available geological information to obtain useful, cheap and fast lithological and structural subsurface information.

Download

Tracing buried pipelines using multi frequency electromagnetic

NRIAG Journal of Astronomy and Geophysics, 2014

In this paper the application of multi frequency electromagnetic techniques to locate buried pipe... more In this paper the application of multi frequency electromagnetic techniques to locate buried pipelines is described. The survey site has two pipelines of SUMED, one of the world chokepoints. At desert or arid areas, regular geophysical surveys usually are difficult to carry out. EM techniques could be the best among geophysical techniques to be used for this target at these conditions. The EM survey was performed using a GEM-300 multi-frequency electromagnetic profiler. It is of handheld electromagnetic induction-type that measures in-phase and quadrature terrain conductivity without electrodes or direct soil contact. An area of 60 • 15 m was surveyed, that supposed SUMED pipeline existed. Six different frequencies, typically 2025, 2875, 4125, 5875, 8425, 12,025 Hz, have been used simultaneously. The slice maps for in-phase and conductivity distribution at each frequency could help to trace the extension of the pipeline. Two pipelines were traced successfully with 20 m spacing of each others.

Download

Landmines detection and assessment using GPR survey

Proceedings of the 8th SEGJ International Symposium, 2006

Delineation of Shallow Subsurface Structure by Azimuthal Resistivity Sounding and Joint Inversion of VES-TEM Data: Case Study near Lake Qaroun, El Fayoum, Egypt

Pure and Applied Geophysics, 2009

Page 1. Delineation of Shallow Subsurface Structure by Azimuthal Resistivity Sounding and Joint I... more

A Coastal Aquifer Study Using Magnetotelluric and Gravity Methods in Abo Zenema, Egypt

Pure and Applied Geophysics, 2011

Magnetotelluric (MT) soundings and gravity methods were employed to study the deep freshwater aqu... more Magnetotelluric (MT) soundings and gravity methods were employed to study the deep freshwater aquifer in the area north of Abo Zenema city on the eastern side of the Gulf of Suez, Egypt. Seven MT sites and 48 gravity stations were surveyed along northeast-southwest profiles as close as possible to a line perpendicular to the coast of the Gulf of Suez.

Integrated Geophysical Survey for Site Investigation at a New Dwelling Area, Egypt

Journal of Environmental and Engineering Geophysics, 2006

An integrated geophysical survey was carried out in a new dwelling area at 15-May town, southeast... more An integrated geophysical survey was carried out in a new dwelling area at 15-May town, southeast Cairo, Egypt. The buildings in this area are intensively affected by dangerous cracks that cause structural instability. The survey aimed to image the shallow subsurface structures, including karstic features, and evaluate their extent, as they may cause rock instability and lead to cracking of the residential buildings. Resistivity profiling (2-D), using a dipole-dipole array and ground penetrating radar (GPR) surveys were carried out along seven parallel traverses extending about [Formula: see text] between the buildings blocks. Additional measurements using a Schlumbereger array and very low frequency electromagnetic (VLF-EM) methods were conducted. The acquired data were processed and interpreted integrally to elucidate the shallow structural setting of the site. Integrated interpretation led to the delineation of hazard zones rich with karstic features in the area. Most of these ka...

Inversion of DC resistivity data using neural networks

Geophysical Prospecting, 2001

... During the last several decades various approaches to the interpretation of geoelectrical res... more

AMT and CSAMT methods for hydrocarbon exploration at Nile Delta, Egypt

Arabian Journal of Geosciences, 2014

ABSTRACT The offshore Nile Delta Basin Egypt has been known for long time as a significant source... more ABSTRACT The offshore Nile Delta Basin Egypt has been known for long time as a significant source of gas and oil. The study area is located on the Middle Eastern part of the Nile Delta near to Mansoura city. Magnetotelluric method (MT) has emerged as promising tool for oil exploration than any other geophysical technique. Hydrocarbon reservoirs typically exhibit higher electromagnetic resistivity than their surroundings. In this paper the MT method is used to investigate the resistivity subsurface structure that related to hydrocarbon exploration and integrated the results with seismic data that conducted in the same area.. The MT survey was performed using two frequency ranges: high (10 Hz to 100 kHz) and low (0.1 Hz to 1 kHz). Low-frequency natural MT waves were recorded using AMT only, and the measurement was then repeated using an artificial signal source for CSAMT. These surveys were carried out along three profiles having 22 sites. The recorded time-series data were transformed to the frequency domain and processed to determine apparent resistivities and phases at each site which then the determinant average of the impedance tensor was used for One-dimensional and 2-D inversion. A good coherence was found between the electromagnetic and seismic profiles and show that the Hydrocarbon is exiting in the Abu-Madi and Qawasim channel which represent the main gas containing layers in the Nile delta. The depth and extension of these layers were estimated and imaged with a maximum thickness of 4000 m at profile 1 in the northwestern part of the study area.

Conceptual model and numerical simulation of the hydrothermal system in Hammam Faraun hot spring, Sinai Peninsula, Egypt

Arabian Journal of Geosciences, 2010

... Mohamed Abdel Zaher & Sachio Ehara & Gad El-Qady ... of African plate which bounded t... more

Geophysical Investigation at Tell El-Dabaa" Avaris" Archaeological Site

Mediterranean …, 2011

... Also using Geoplot program (Geoscan, 1994) was essential, which has many functions for remove... more

Gad El-Qady

Uploads

Papers by Gad El-Qady

Log In