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:

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    Open Hole Logging, including Fault detection and (Wireline) Formation testing

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    Production Logging on Coiled Tubing, including the use of Pulsed Neutron logs to identify gas and water in the horizontal section

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    Downhole pressure measurement for understanding horizontal well ‘dynamics’ and for production optimisation

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    Horizontal well test interpretation in a compartmentalised oil-rim.

Keywords:
spinner, correction, gradient, accumulation, horizontal section, flow velocity, information, orientation, production monitoring, production control
Subjects:
Well & Reservoir Surveillance and Monitoring, Formation Evaluation & Management, Production logging, Open hole/cased hole log analysis
Copyright 1991, Society of Petroleum Engineers
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