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New prediction method of oil well deliverability of low permeability reservoir
HE Yan-feng1,WTJ Xiao-dong1,HAN Zeng-jun2,ZHAO Jun3,ZHANG Li-hui4
(1.MOE Key Laboratory of Petroleum Engineering in China Univenity of Petroleum, Beijing 102249,China;2.9th Oil Production Plant of Daqing Oilfield Companyt PetroChina, Daqing 163853, Heilongjiang Province, China;3. Departmem of fntematianal Cooperstien of China Unued Coalbed Metkane Corporation Umttedf Beijing 100011, China ,;4. Drilling and Production Technology Research Institute of Qinghai Oilfield Company ^ PetroChina T Dunhuang 736202, Gansu Province, China)
Abstract:
In order to predict oil well deliverability of low permeability reservoir accurately, a combination deliverability prediction model was presented based on Darcy law. The effecta of reservoir fluid property in high and low pressure and the starting pressure gradient c?n the |>ercplBtiOTi laws were taken into account in this model- The solution methods of ultimate bottom-hole producing pre&sure and production tuming point in inflow performance relation curve were given out. And ihe effects of reservoir fluid property and the starting pressure gradient on the oil well deliverability in low permeability reservoir ware analyzed. The prediction results of the new model were compared with that of old models and verified with real data. It ia proved that the new method has high accuracy and. can be used in engineering calcula.tton.
Key words:  Low permeability reservoir  Darcy equation  Btaiting pressure gradient  deliverability prediction