Utilizing Pumpdown Pulsed Neutron Logs in Horizontal Wellbores to Evaluate Fractured Carbonate Reservoirs


B. R. Noblett, Western Atlas International,
M. G. Gallagher, Weber Energy

SPWLA 34th Annual Logging Symposium, June 13-16, 1993



Pulsed neutron logging has proven itself to be an excellent method for determining fractured intervals and hydrocarbon-bearing zones. With the onset of horizontal drilling in fractured carbonate reservoirs, enhanced logging and interpretation techniques have been developed. Through-drillpipe logging technology using pump-in valves, pumpdown subs, and 1-11/16-in.