1. Schlumberger Dhahran Carbonate Research Center, Dhahran Techno Valley − KFUPM, P.O. Box 39011, Dammam/Doha Camp, Dhahran 31942, Saudi Arabia
2. Retired, Formerly Saudi ARAMCO, Reservoir Characterization Department, Dhahran 31311, Saudi Arabia
3. Schlumberger DBR Technology Center, 9450−17th Avenue, Edmonton AB T6N 1M9, Canada