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- W2054165063 abstract "Abstract Daqing Oilfield is now at the stage of extra-high watercut after 48 years of development. Since 1996, the field scale polymer flooding has been targeting major reservoirs with thick pay zones and high permeability, and the commercial polymer in Class ІІ reservoirs (the effective thickness is 1~3m and the effective permeability is higher than 100×10−3 μm2) also started. In order to increase the recovery factor of Class ІІІ reservoir and to improve the development effect of mature oilfield, the study on polymer flooding in Class ІІІ reservoir (the effective permeability is less than 100×10−3 μm2, the effective thickness is smaller than 1m) and corresponding pilot test were performed. The objectives were to enhance oil recovery efficiency, increase recoverable reserves of Class ІІІ reservoir, and determine potential target layers for field scale polymer flooding. In this work, based on the detailed geological information, optimal polymer injection parameters were designed based on the coreflood tests and numerical simulation. The coreflood results indicated that the compatibility between the molecular size of polymer and pore structure of Class ІІІ reservoir is very important. Physical properties of reservoir, well log data, sealed coring data, the polymer injection parameters were also selected for the design. Six sets of polymer flood plans were calculated and compared. The results showed that the novel separate-layer injection with different molecular weights obtained higher oil recovery. The polymer injection in pilot test started in March 2007. The field application results of initial stage of polymer flooding are very promising." @default.
- W2054165063 created "2016-06-24" @default.
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- W2054165063 date "2008-04-20" @default.
- W2054165063 modified "2023-09-28" @default.
- W2054165063 title "Study of Polymer Flooding in Class III Reservoir and Pilot Test" @default.
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- W2054165063 doi "https://doi.org/10.2118/109546-ms" @default.
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