Formation Evaluation of Bahariya Groundwater Aquifer Using Nuclear Logs at the Southwest area of Bani Sweif, Upper Egypt, (A Case Study)

Document Type : Original Article

Authors

1 Geophysical Exploration department, Desert Research Center

2 Geophysical Exploration department, Desert Research Center, Cairo, Egypt

3 physics, Faculty of science, Zagazig university

Abstract

Over the last decade, rapid development has occurred in Upper Egypt's western desert regions to address water shortages in irrigation and domestics. The national state plan seeks to reclaim one and a half million acres of these areas. Because of the increasing demand for water, it is important to identify aquifer characterization in terms of petrophysical properties which are obtained from geophysical well logging analysis. The nuclear well logs are used in this study to estimate the physical properties and evaluate the Bahariya formation. Theses logs are (RHOB), neutron (APLC), gamma ray (GR) besides resistivity (AT60-AT30-AT90), caliper (CAL), and sonic (DT) record logs to give more information about aquifer characterization. The results clarify that the Lower Bahariya formation is mainly composed of fine to medium-grained sandstone and clay, which may indicate low permeability where, The Upper Bahariya is exhibited poor sand succession. The hydraulic conductivity of the studied aquifer has a minimum value of 1335.97 mdarcy at well WBS1. It increases in the south direction and decreases in the other direction of the area under investigation. Shale volume ( ) reaches the maximum percentage of 31.7% at WBS1 well and the minimum percentage is 14.7% at WBS2. In addition to the porosity and permeability can reveal the quality of the studied aquifer, which decreases in the west-south direction and increases in the south and southeast parts of the study area. This study can help in making decisions to save and protect groundwater resources in the future.

Keywords

Main Subjects

Files

Share

How to cite

Statistics