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Three geological factors for improving estimation quality of original oil in place

BI Hai-bin 1 ZHA Quan-heng 1 WANG Yong-zhuo 2 (1.Research Institute of Petroleum Exploration and Development,PetroChina,Beijing 100083,China; 2.Daqing Oilfield Company,Limited,Daqing 163453,China)  
The development situations of original oil in place (OOIP) in China were analyzed.The affecting factors on OOIP of reservoirs include mainly oil-bearing area and net pay thickness of reservoir.Three uncertainties affecting on OOIP including reservoir sampling limitation,technical uncertainty and commercial uncertainty were discussed.It is suggested that three geological bases for improving estimation quality of original oil in place such as structure,oil-water system and reservoir heterogeneity should be researched further more.
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