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    • 33. 发明授权
    • Enhanced oil recovery
    • 提高采油率
    • US4536301A
    • 1985-08-20
    • US521282
    • 1983-08-08
    • Thomas P. MalloyRaymond J. Swedo
    • Thomas P. MalloyRaymond J. Swedo
    • B01F17/00C09K8/584C09K3/00E21B43/22
    • C09K8/584B01F17/0085Y10S507/936
    • The recovery of residual oil which is found in subterranean reservoirs may be accomplished by utilizing an aqueous surfactant slug to reduce the interfacial tension between oil and water. An effective surfactant slug which may be used will comprise a mixture of: (1) from about 1 to about 10% of a sulfonate of a mixture of mono- and dialkyl-substituted aromatic hydrocarbon which has been obtained by the alkylation of an aromatic hydrocarbon with an olefinic hydrocarbon in the presence of a hydrogen fluoride catalyst; (2) a lower alkyl alcohol which possesses from about 3 to about 6 carbon atoms; and (3) a nonionic cosurfactant comprising an ethoxylated n-alcohol which possesses from about 12 to about 15 carbon atoms.
    • 在地下储层中发现的残余油的回收可以通过利用水性表面活性剂团块来降低油和水之间的界面张力来实现。 可以使用的有效的表面活性剂团块将包含以下混合物:(1)约1至约10%的通过芳烃的烷基化获得的单烷氧基和二烷基取代的芳族烃的混合物的磺酸盐 在氟化氢催化剂存在下用烯烃; (2)具有约3至约6个碳原子的低级烷基醇; 和(3)包含具有约12至约15个碳原子的乙氧基化正醇的非离子辅助表面活性剂。