الفهرس 
1.INTRODUCTION AND GEOLOGICAL SETTINGSOnly 14 pages are availabe for public view
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Abstract
Based on the available data of core analysis and well log data of foق wells chosen in the Qawasim Formation of West Dikirnis field, NorthEgypt have been studied. The presence study aims to evaluate the petrophysical properties and to discriminate the Qwasim Formation of West Dikirnis field. The study was accomplished by using the measured conventional core data include helium and summation fluids porosities(∅He, and ∅SF), grain and bulk densities, horizontal and vertical permeabilities (KH, Kv) and permeability anisotropy. Also the water saturation, and flow unit characterization factors as (Flow Zone Indicator (FZI), Reservoir Quality Index (RQI), and Reservoir Potentiality Index(RPI). were calculated to establish a successful reservoir zonation. In theWest Dikirnis field, the type of reservoir rock (RRTs) has been discriminated as two rock types. This discrimination described based on its lithologic composition. The first type is RRT1, which is composed mostly of siliceous pebbly sandstones, and the second type is RRT2, that is composed mainly of ferruginated siliceous sandstones. Based on the interpretation of petrophysical parameters and ranking these parameters for samples, the RRT1 samples have very good rank. These ranks are indicated as high porosity and permeability, also high values of factors of flow unit characterization (FZI and RQI). These are assigned as the best type of rock. The RRT2 samples shows decreasing in factors of flow zone indicator and reservoir quality index. The examined sequence has been sliced into reservoir zones; each zone has its hydraulic flow unit range that represents the studied rock types in each zone Borehole logs were used to provide measurements which are related to lithology of rock, the type of hydrocarbon present in porous formations and the pore volume fraction. Measuring techniques are used from threebroad disciplines: electrical, nuclear, and acousticlogs. The electrical technique measure the electrical conductivity. The porosity is affected byconductivity of a porous formations, the porosity of the formation is usually sensitive to anumber of nuclear measurements. The interactions between high-energy neutrons and hydrogen atoms of fluid in the interstitial pore space which reduce the neutron energy porosity in formation can measure. Logs are used to define physical characteristics of reservoir rock, and evaluate fluid saturations in the well. from data of logs and by using different empirical equations we can determine the porosity, and water saturation, logging data are used to identify production zones, estimate hydrocarbon, determine prospective zones, distinguish between oil, gas and water, and to determine facies relationships. and by using isoparametrer contour maps can determine the increasing and decreasing in porosity, water saturation and volume of clay. RRT1 samples shows increasing in porosity and decreasing in saturation of water and volume of shale The direction of northern west has decreasing in porosity and increasing in water saturation and volume of shale.