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Ain Shams Engineering Journal, 2020

The analysis of carbonate reservoirs over the past decades showed a great complexity due to the c... more The analysis of carbonate reservoirs over the past decades showed a great complexity due to the complicated pore pattern and petrofabrics developed by the complex factors prevailed their depositional and diagenetic history. In the present study, an artificial neural network (ANN) with feedforward backpropagation facilitated the direct prediction of carbonate diagenesis from log records of 12 wells penetrating four different petroleum reservoirs of various characteristics. Logs and core data are analyzed for diagenesis quantification (to calculate the diagenesis coefficient or D-coefficient) and relating these diagenesis values to the known types of diagenesis and pore types. The final ANN output model developed a numerical scale between 0 and 10 for carbonate rocks diagenesis and have alternatively been compared to the dominant diagenesis in the corresponding core samples to identify possible relationships. Results showed that the D-coefficients of 0-3.8 indicate Stylolite or/compaction diagenesis, while the 3.8-6.5 coefficients mark dolomitization/recrystallization diagenesis and the 6.5-10 coefficients are reserved to dissolution diagenesis. Such results highlight the efficiency of ANN in diagenesis quantification using well log measurements for better characterization of complex carbonate systems.

Open Journal of Geology, 2013

Microseismic technology has been proven to be a practical approach for in-situ monitoring of frac... more Microseismic technology has been proven to be a practical approach for in-situ monitoring of fracture growth during hydraulic fracture stimulations. Microseismic monitoring has rapidly evolved in acquisition methodology, data processing, and in this paper, we evaluate the progression of this technology with emphasis on their applications in Barnett shale gas reservoir. Microseismic data analysis indicates a direct proportion between microseismic moment magnitude and depth, yet no relation between microseismic activity and either injection rate or injection volume has been observed. However, large microseismic magnitudes have been recorded where hydraulic fracturing stimulation approaches a fault and therefore the geologic framework should be integrated in such programs. In addition, the geometry of fracture growth resulted by proppant interactions with naturally fractured formations follows unpredictable fashion due to redirecting the injection fluids along flow paths associated with the pre-existing fault network in the reservoir. While microseismic imaging is incredibly useful in revealing the fracture geometry and the way the fracture evolves, recently several concerns have been raised regarding the capability of microseismic data to provide the fracture dimensional parameters and the fracture mechanism that could provide detailed information for reservoir characterization.

International Journal of Advancement in Engineering Technology and Computer Sciences, 2014

Open Journal of Earthquake Research, 2014

Petroleum reservoir operations such as oil and gas production, hydraulic fracturing, and water in... more Petroleum reservoir operations such as oil and gas production, hydraulic fracturing, and water injection induce considerable stress changes that at some point result in rock failure and emanation of seismic energy. Such seismic energy could be large enough to be felt in the neighborhood of the oil fields, therefore many issues are recently raised regarding its environmental impact. In this research we analyze the magnitudes of microseismicity induced by stimulation of unconventional reservoirs at various basins in the United States and Canada that monitored the microseismicity induced by hydraulic fracturing operations. In addition, the relationship between microseismic magnitude and both depth and injection parameters is examined to delineate the possible framework that controls the system. Generally, microseismicity of typical hydraulic fracturing and injection operations is relatively similar in the majority of basins under investigation and the overall associating seismic energy is not strong enough to be the important factor to jeopardize near surface groundwater resources. Furthermore, these events are less energetic compared to the moderately active tectonic zones through the world and usually do not extend over a long period at considerably deep parts. However, the huge volume of the treatment fluids and improper casing cementing operation seem to be primary sources for contaminating near surface water resources.

This study evaluates changes in land use associated with agricultural development and urban expan... more This study evaluates changes in land use associated with agricultural development and urban expansion in Eastern Nile Delta region from 1984 to 1990 and from 1990 to 2003. Three Landsat TM scenes were used to produce land use maps for the years 1984, 1990, and 2003. Normalization of corresponding bands in our multitemporal dataset enhanced the ability of classification algorithms

International Journal of Remote Sensing, 2012

Due to the progressive increase in population, sustainable development of desert land in Egypt ha... more Due to the progressive increase in population, sustainable development of desert land in Egypt has become a strategic priority in order to meet the increasing demands of a growing population for food and housing. Such obligations require efficient compilation of accurate land-cover information in addition to detailed analysis of archival land-use changes over an extended time span. In this study,

International Journal of Remote Sensing, 2009

Due to the progressive increase in development of desert land in Egypt, the demand for efficient ... more Due to the progressive increase in development of desert land in Egypt, the demand for efficient and accurate land cover change information is increasing. In this study, we apply the methodology of post‐classification change detection to map and monitor land cover change patterns related to agricultural development and urban expansion in the desert fringes of the Eastern Nile Delta region.

Hydrogeology Journal, 2012

ABSTRACT Gold Valley is typical of intermountain basins in Death Valley National Park (DVNP), Cal... more ABSTRACT Gold Valley is typical of intermountain basins in Death Valley National Park (DVNP), California (USA). Using water-balance calculations, a GIS-based analytical model has been developed to estimate precipitational infiltration rates from catchment-scale topographic data (elevation and slope). The calculations indicate that groundwater recharge mainly takes place at high elevations (>1,100 m) during winter (average 1.78 mm/yr). A resistivity survey suggests that groundwater accumulates in upstream compartmentalized reservoirs and that the groundwater flows through basin fill and fractured bedrock. This explains the relationship between the upstream precipitational infiltration in Gold Valley and the downstream spring flow in Willow Creek. To verify the ability of local recharge to support high-flux springs in DVNP, a GIS-based model was also applied to the Furnace Creek catchment. The results produced insufficient total volume of precipitational infiltration to support flow from the main high-flux springs in DVNP under current climatic conditions. This study introduces a GIS-based infiltration model that can be integrated into the Death Valley regional groundwater flow model to estimate precipitational infiltration recharge. In addition, the GIS-based model can efficiently estimate local precipitational infiltration in similar intermountain basins in arid regions provided that the validity of the model is verified.

JENdA: A Journal of Culture and …, 2010

Abdulaziz A. Abdulaziz is a correspondent of Leadership newspapers in Kano, Nigeria. A student of... more Abdulaziz A. Abdulaziz is a correspondent of Leadership newspapers in Kano, Nigeria. A student of English at Bayero University, Kano, he has poems published in some anthologies, newspapers and the Internet. He is working on his first collection. ... Her womb was not dry; she was ...

Arabian Journal of Geosciences, 2013

Siwa represents the last virgin oasis in the western desert of Egypt. Recently, serious environme... more Siwa represents the last virgin oasis in the western desert of Egypt. Recently, serious environmental changes pertaining to the invaluable groundwater resources, such soil salinity and expansion in surface lakes have developed due to excessive uncontrolled groundwater discharge associating land development for agriculture. The present work tackles these problems through monitoring the configuration of pressure head in carbonate and Nubian Sandstone aquifers using multilayer groundwater model. Several scenarios for pumping stress are tested, and the results indicated that the optimum pumping should be close to 520,000 m 3 /day with important disturbances in the pressure head encountered between Bahei ElDin Lake and Zeitoun Lake. This aquifer stress is capable of lowering the pressure head to stop artesian flow and inconsequence saves large water quantities draining daily to the lakes through natural flow and mitigates the waterlogging problems. In addition, minimal changes are observed in the eastern part of the modeled area suggesting additional production wells to tap the aquifer system at this barren area and initiate new development projects. Such results demonstrate the potential of groundwater flow modeling in water resources management to define the optimum pumping scenarios capable to mitigate environmental problems.

Page 1. THE EFFECTIVENESS OF SAUDI ARABIA&#x27;S SECONDARY INDUSTRIAL INSTITUTES COOPERAT... more Page 1. THE EFFECTIVENESS OF SAUDI ARABIA&#x27;S SECONDARY INDUSTRIAL INSTITUTES COOPERATIVE EDUCATION PROGRAM AS PERCEIVED BY THEIR ORGANIZATIONAL PARTNERS DISSERTATION Presented in Partial Fulfillment of the Requirements for ...