New pay,as represented by thickness (h),is one of the most important parameters used in volumetric estimates of in-place khydrocarbons,well test interpretations,fluid injection analysis (water,gas,or enhanced recovery mehtods),reservoir engineering studies,or unitizasiton procedrues.Unfortunately,the petroleum engineering and geologicla literature provides very limited insight into jhow new pay should be ocmputed.For a porous interval to be counted as net pay,.the interval must contain hydrocarbons,be reasonably permeable,and for waterfloods,be laterally continuous from injector to producer.The issue is what protaion of htis interval coan be porduced to yield meaningful quantities of hydrocarbons usnder the particular drive mechanism.
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