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    • 2. 发明授权
    • Hydrocarbon recovery process
    • 烃回收过程
    • US07987907B2
    • 2011-08-02
    • US12310788
    • 2007-09-05
    • Ian Ralph CollinsGary Russell Jerauld
    • Ian Ralph CollinsGary Russell Jerauld
    • E21B43/20E21B43/22E21B49/00C09K8/58
    • E21B43/20C09K8/58Y10S507/904Y10S507/936
    • Method for increasing the recovery of crude oil from a reservoir containing at least one porous and permeable subterranean formation wherein the formation includes sandstone rock and at least one mineral that has a negative zeta potential under the reservoir conditions and wherein crude oil and connate water are present within the pores of the formation. The method is carried out by (A) injecting into the formation a slug of an aqueous displacement fluid that displaces crude oil from the surface of the pores of the formation wherein the pore volume (PV) of the slug of the aqueous displacement fluid is at least 0.2 and less than 1 and the aqueous displacement fluid has a total dissolved solids (TDS) content in the range of 200 to 10,000 ppm and the fraction of the total multivalent cation content of the aqueous displacement fluid to the total multivalent cation content of the connate water is less than 1, and (B) subsequently injecting into the formation a drive water of higher multivalent cation content and/or higher total dissolved solids content than the aqueous displacement fluid.
    • 从含有至少一个多孔和可渗透的地层的储层中增加原油的回收率的方法,其中所述地层包括砂岩岩石和至少一种在储层条件下具有负ζ电位的矿物,并且其中存在原油和原生水 在地层的孔内。 该方法通过以下步骤进行:(A)向地层中注入含水置换液体的块状物,所述含水置换液体从地层孔隙的表面取代原油,其中含水置换流体的矿渣的孔体积(PV) 至少0.2和小于1,并且含水置换流体的总溶解固体(TDS)含量在200至10,000ppm的范围内,并且含水置换流体的总多价阳离子含量与总多价阳离子含量的比例相对于 原生水小于1,(B)随后向该地层注入含水位移流体中较高的多价阳离子含量和/或更高的总溶解固体含量的驱动水。