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《Petroleum Exploration and Development》 2004-05
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Supplement to determining method of cut-off value of net pay

GUO Rui(China University of Geosciences , Beijing 100083, China;CNODC, Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083,China)  
Reservoir evaluation and OOIP estimation are based on the establishing of cutoff value of net pay. Although multiple methods are available, there is much uncertainty in determining the cutoff value due to limited testing data. The cutoff value of net pay depends greatly on the component texture, fluid property (especially, crude oil property) and buried depth. 64 cutoff values of net pay have been gained in overseas oilfields evaluation. The relationship between cutoff value and crude oil gravity or burial depth is gained according to the statistical analysis on overseas cutoff values of net pay. It could be used to determine and check the cutoff value of net pay in new oilfields.
【CateGory Index】: P618.13
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