Pulsed-neutron capture logs (PNC) have been applied to address specific reservoir management issues in three mature Permian Basin fields (Cordona Lake, Cornell, and East Vealmoor). When combined with existing well data and a knowledge of formation fluid compositions, single runs with PNC logs have provided valuable reservoir surveillance data in secondary and tertiary recovery reservoirs. The logs have led directly to increased production, more cost effective workovers, and an improved understanding of fluid contact movement and injection breakthrough.

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