R.D. Pourciau, SPE, Chevron Corp., and R. Waltman, SPE, Halliburton
Frac packing has become the standard sand-control completion technique for many
deepwater operators because of low completion failure rates and excellent production
performance. These treatments are engineered to optimally place the stimulation
fluids and proppants based on gravel- pack (GP) tool operational procedures and
fracture model simulations. Direct near-wellbore measurements from radioactive
(RA) tracers can be used to help minimize both engineering and operational uncertainties
of this process.
A comprehensive review of 30 Gulf of Mexico frac-pack completions within four deepwater
fields has been completed, in which RA tracers have been used. These logs allowed
initial assessment of the sand control and resulted in better frac-pack designs.
The average perforation length of these 30 completions is 94- ft and the average
deviation is 41°. Three of these wells have more than 200- ft of perforations and
seven have over 60° of hole deviation.