查看更多>>摘要：The Zeit sand reservoir is one of the most prolific formations at Northwestern side of the Gulf of Suez.In this research we will try to coordinate between electrical,petrophysical properties,dep-ositional environment and facies discrimination in order to evaluate the hydrocarbon potentiality of studied Zeit Formation.The statistical parameters for potassium(K),thorium(Th)and Th/U ratio con-tents have a general increase towards northwestern parts,whereas uranium(U)content has a general increase towards southeastern parts.The sandstone facies is distinguished from the other facies by its thorium content>4 ppm.U has high carbonate content(U≥1 ppm).Rocks'electrical properties vary greatly depending on a number of factors.Electrical measurements were taken at frequencies range of(5×10-4 Hz-100 kHz)for fully saturated samples(clayey sandstone)with NaCl(20 gm/L).As salinity,clay content,and frequency increase,consequently does the electrical properties.The continental condi-tion are present in northwestern part(back-sea)which is distinguished by high K percent,high Th,high Th/U ratio,and low U contents.Low K,Th,and Th/U ratio contents,with high U contents,charac-terize the marine depositional environment that existed around the east and southeastern parts(fore-sea coincide with the dipping of strata).Furthermore,the studied Zeit Formation has good petrophysi-cal properties that coincide with marine conditions.The middle and eastern parts(around ISS-94 and CSS-288)is a good reservoir(porosity 36% -39% ,shale content<15% ,hydrocarbon saturation 71% -92% ,and net pay thickness 17-63 feet).
查看更多>>摘要：Most studies on solute transport in coastal aquifers affected by tides focus on the trans-port of instantaneous released solute,and there are few studies on continuously released solute affected by tides.In this study,the image monitoring method is used to establish the quantitative relationship between the concentration of the colored tracer and the hue value of the image,and the digital image is used to determine the tracer concentration distribution.Using image monitoring method laboratory ex-periments,quantitative analysis of the characteristics of continuously released solute transport in coast-al unconfined aquifers under the tidal influence.Experiments show that the high tide inhibits the in-crease in the concentration of each point in the aquifer.Under the influence of tides,the solute plume retreats towards the land.During the low tide period,the solute plume migrates toward the sea again.And the solute plume will maintain a relatively stable shape after entering the aquifer for a long enough time.Ignoring the tidal effect seems to have little effect on the estimation of the position of the solute plume,but ignoring the tidal effect has a certain influence on the estimation of the dispersion range of the solute plume.No matter whether considering the tidal action,the final dispersion range of the solute plume is almost the same.But before the solute plume reaches a stable state,ignoring the tid-al effect will lead to a smaller dispersion range of the solute plume.
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