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    • 50. 发明授权
    • Water flooding method
    • 水驱法
    • US07455109B2
    • 2008-11-25
    • US11632994
    • 2005-06-30
    • Ian Ralph Collins
    • Ian Ralph Collins
    • E21B43/20
    • C09K8/528B01D61/002B01D61/005B01D2311/04B01D2311/2626B01D2311/2649B01D2311/2657B01D2317/04C09K8/58E21B37/06E21B43/20Y02A20/131
    • A method of recovering hydrocarbons from a porous subterranean hydrocarbon-bearing formation comprising: (a) feeding a first stream comprising a high salinity water to a first side of a semipermeable membrane of at least one forward osmosis unit of a desalination plant and feeding a second stream comprising an aqueous solution of a removable solute to a second side of the semipermeable membrane wherein the solute concentration of the aqueous solution of the removable solute is sufficiently greater than the solute concentration of the high salinity water that water passes through the semipermeable membrane from the high salinity water into the aqueous solution of the removable solute to form a diluted aqueous solution of the removable solute; (b) withdrawing a third stream comprising a concentrated brine and a fourth stream comprising a diluted aqueous solution of the removable solute from the first and second sides respectively of the semipermeable membrane of the forward osmosis unit; (c) substantially separating the removable solute from the fourth stream comprising the diluted aqueous solution of the removable solute to form a low salinity water stream having a total dissolved solids content of less than 5000 ppm; (d) if necessary, increasing the salinity of the low salinity water stream to a total dissolved solids content of at least 200 @@m; (e) introducing the treated low salinity water into the hydrocarbon-bearing formation via an injection well; (f) displacing the hydrocarbons with the treated low salinity water towards an associated production well; and (g) recovering hydrocarbons from the formation via the production well.
    • 一种从多孔地下含烃地层回收烃的方法,包括:(a)将包含高盐度水的第一物流供给至少一个脱盐设备的至少一个正渗透单元的半透膜的第一侧,并将第二物流 包含可去除溶质的水溶液到半透膜的第二侧的流,其中可除去溶质的水溶液的溶质浓度足够大于水从半透膜中通过半渗透膜的高盐度水的溶质浓度 高盐度水进入可除去溶质的水溶液中形成可去除溶质的稀释水溶液; (b)从正向渗透单元的半透膜的第一侧和第二侧排出包括浓缩盐水和第四料流的第三料流,所述第四料流包含可除去溶质的稀释水溶液; (c)将可移除溶质与包含可除去溶质的稀释水溶液的第四料流基本分离,以形成总溶解固体含量小于5000ppm的低盐度水流; (d)如有必要,将低盐度水流的盐度提高至至少200 @ m的总溶解固体含量; (e)通过注射井将经处理的低盐度水引入含烃地层; (f)将处理过的低盐度水代替烃与相关的生产井; 和(g)通过生产井从地层回收碳氢化合物。