Cased Hole Resistivity—A Solution for Dukhan Field Arab C Reservoir Monitoring

The onshore Dukhan oil field of Qatar Petroleum has been under production since the 1940’s. Water is injected to maintain<br>reservoir pressure, and a reservoir monitoring program has been established to monitor movements of oil-water (OWC) and<br>gas-oil contacts (GOC) in the different reservoir zones. Historically, Pulsed Neutron Capture (PNC) logging (Sigma) was<br>carried out for contacts monitoring and time-lapse saturation monitoring. In September 2007 Cased Hole Resistivity (CHR)<br>was introduced for application in the Arab C reservoir.