This paper concentrates on experience gained and techniques currently used in the evaluation of horizontal wells in an oil-rim located in the unconsolidated sands of the Rabi field, onshore Gabon, West Africa. Valuable experience leading to improved understanding has been obtained in the areas of:
Open Hole Logging, including Fault detection and (Wireline) Formation testing
Production Logging on Coiled Tubing, including the use of Pulsed Neutron logs to identify gas and water in the horizontal section
Downhole pressure measurement for understanding horizontal well ‘dynamics’ and for production optimisation
Horizontal well test interpretation in a compartmentalised oil-rim.