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Abstract
The purpose of the study to obtained well screens opening size and gravel packs size, and to access within the groundwater inter through the aquifer to the well screen and prevent running sand from entering the well. The use of properly designed screen and gravels are important and this paper is an important reference for the design of groundwater wells. In this study, the purpose of the circle method is to design water well and the benefits of sand control. The determination of screen slot size and its variation in the opening is often a major aim of hydrogeological studies. However, measurement of hydraulic conductivity (K) at a high spatial resolution in sedimentary aquifers is a challenge. One commonly used approach is to estimate slot size from grain size analysis. The objectives of this study are to compare between curve of grain size analysis, bar graph and circle method used applied different formulas for the determination of slot size from grain-size data and to evaluate how well this method predicts slot size and gravel pack. Correlation between the mechanical analysis curve, bar graph and the circle methods were found for the used applied different formulas. Based on circle results, the applied circle formulas appear to be suitable for an initial assessment of aquifer properties. However, considering the difference in calculated aquifer parameter values, results are smaller significantly and reliable for the high analysis of aquifer materials.
Highlights
A quantitative description of soil particle size distribution (PSD) is important for soil structure research (Yusong Deng, et al 2017) [17]
The analysis of circle method is perform by using the values of angle, but the curves of mechanical analysis are performed by using the cumulative weight of particles retained or passing percent
The aim of this study was to compare between the grain size analysis curve and circle diagram
Summary
A quantitative description of soil particle size distribution (PSD) is important for soil structure research (Yusong Deng, et al 2017) [17]. There are a number of factors that controlling the choice of the quality of screens, the most important of which are the nature of the aquifer, the quality of the groundwater, the depths of wells and vertical and horizontal pressures. Screens differ in the size of the openings (slot size) and the materials that are made of them. The good materials of screens are the ones that give a high efficiency and a longer life for operation and the best openings (slot size) as possible to provide the maximum open area in front of the aquifer and with the requirements of hardness and strength. The proper selection of slot opening in relation to the sizes of aquifer materials (Mehaysen, and Mahasneh, 2015) [11]
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