Sabei Oil Field Poly High Water Drive Reservoir Flooding Enhanced Oil Recovery Steam Experimental Study

In order to explore new ways to further reservoir after polymer flooding enhanced oilrecovery,application of steam flooding can improve the flow properties of crude oil, oildisplacement efficiency can be improved and the technical characteristics of swept volumecoefficient, Sabei polymer flooding oilfield carried out high water reservoir floodingenhanced oil recovery steam Experimental Research, designed to provide the theoretical basisand technical reserves of oil after polymer flooding further tap the potential.This paper systematically analyzed in depth geological characteristics of the reservoirafter polymer flooding Sabei oilfield, mining history and distribution of remaining oil, on thebasis of the test area oil steam flooding curve analysis, detailed analysis of the test area todevelop dynamic characteristics test of steam flooding, evaluation of the pilot test of technicalmeasures, evaluate the pilot test of technical measures. The method according to the currentsteam flood pilot area development status, the use of reservoir engineering and numericalsimulation, analyzes the main factors that influence the development of high water oilfieldsteam flooding effects, including reservoir depth, reservoir thickness, reservoir heterogeneityrhythm and reservoir geology and other factors, remaining oil distribution, status fielddevelopment factors such as formation water storage rate, and steam injection, steam injectionrate, steam injection pressure, steam dryness, intermittent steam injection time,injection-production ratio and well spacing and other factors injection process parameters.Combined with reservoir engineering calculations and numerical simulation results are givenhigh water reservoir can also choose to inject steam corresponding basic parameters, reservoirdepth of less than1500m, reservoir thickness ranging from5-20m, the degree ofheterogeneity in the degree of recovery is weak and below70%. Optimize the injection ofsteam flooding technology parameters, injection wells from75-100m, about1.0PV steaminjection, steam injection intensity of20-30m3/m d, downhole steam dryness is greaterthan50%, steam injection pressure formation fracture pressure of less than80%, thefour-point method, the five-point method and anti seven o’clock Act may well network.