1. Faculty of Science-Geology Dept., Benha University, Benha, Egypt
2. Institute of Geology and Geochemistry of Petroleum and Coal (LEK), RWTH-Aachen University, Aachen, Germany
3. Petroleum and Natural Gas Dept., College of Engineering, KSU, Saudi Arabia
4. Faculty of Education - Geology Department, Ain Shams University, Cairo, Riyadh, Egypt