Evaluation of Carbonate Formation using both Gas While Drilling and Nuclear Magnetic Resonance Log (Case study, An Oilfield Southern Iraq)

Two wells close to each other (Well A and Well B) have been selected from the same oilfield in southern Iraq. Both were drilled through Mishrif Reservoir, however, perforated within different sub-units. It was observed that one of shows obvious flow naturally while did not notice any kind flow.
 The type hydrocarbon interpretation by Gas drilling method (GWD), results confirmed both these located oil-bearing reservoir with comparable gas profiles.
 However, petrophysical properties pore distribution permeability using Neutron Magnetic Resonance (NMR) data Techlog identified key differences rock quality between across intervals.
 Reservoir reveal very wide performance spite are penetrating oil bearing layers reservoir.
 Keywords: Carbonate Formation, While Drilling NMR Log.