公开(公告)号：US4005749A

公开(公告)日：1977-02-01

申请号：US630832

申请日：1975-11-11

申请人： Silvia C. Birk ,  Samuel H. Collins ,  Peggy M. Wilson

发明人： Silvia C. Birk ,  Samuel H. Collins ,  Peggy M. Wilson

IPC分类号： C09K8/584 ,  C09K8/88 ,  E21B43/22

CPC分类号： C09K8/885 ,  C09K8/584

摘要： A surfactant waterflooding process for the recovery of oil from subterranean oil reservoirs in which a water-soluble polyalkylene oxide is employed as a sacrificial agent in order to retard adsorption of the surfactant. An aqueous pretreatment slug is injected which contains a water-soluble polyalkylene oxide sacrificial agent having a molecular weight of at least 1200. Thereafter an aqueous slug containing a surfactant exhibiting a lower molecular weight than that of the polyalkylene oxide sacrificial agent is injected. The surfactant slug may also contain a polyalkylene oxide sacrificial agent as described above. In this case, concentration of sacrificial agent in the surfactant slug normally is lower than the concentration in the pretreatment slug.

摘要翻译： 用于从其中使用水溶性聚环氧烷作为牺牲剂的地下油藏回收油的表面活性剂注水方法，以阻止表面活性剂的吸附。 注入水分预处理块，其含有分子量至少为1200的水溶性聚亚烷基氧化物牺牲剂。然后注入含有表现出比聚亚烷基氧化物牺牲剂低的分子量的表面活性剂的水性渣块。 表面活性剂团块还可含有如上所述的聚环氧烷牺牲剂。 在这种情况下，表面活性剂块中的牺牲剂浓度通常低于预处理块中的浓度。

公开(公告)号：US4008768A

公开(公告)日：1977-02-22

申请号：US560289

申请日：1975-03-20

申请人： Silvia C. Birk

发明人： Silvia C. Birk

IPC分类号： C09K8/584 ,  E21B43/22

CPC分类号： C09K8/584 ,  Y10S507/936

摘要： A process for the recovery of oil from subterranean oil reservoirs by waterflooding employing an anionic-nonionic surfactant system which is particularly suitable for use in reservoirs in which the connate waters contain a high salt content, including divalent metal salts, or which may be employed in carrying out waterfloods in which the available injection waters exhibit a relatively high salt content. The multifunctional surfactant system comprises a surface-active amide linked sulfonate anionic group and a surface-active polyethylene oxide nonionic group and may be employed in an aqueous solution having a salinity within the range of 3 to 25 weight percent. Subsequent to the injection of the aqueous solution of surfactant, an aqueous flooding medium may be injected which exhibits a salinity which is lower than the salinity of the surfactant slug.

摘要翻译： 一种通过使用阴离子 - 非离子表面活性剂体系进行注水从地下油藏中回收油的方法，该方法特别适用于其中原生水含有高盐含量的油藏，包括二价金属盐，或可用于 进行其中可用注射水表现出相对较高的盐含量的水驱。 多功能表面活性剂体系包括表面活性酰胺连接的磺酸盐阴离子基团和表面活性聚环氧乙烷非离子基团，并且可以用于盐度在3至25重量％范围内的水溶液中。 在注入表面活性剂水溶液之后，可以注入显示比表面活性剂块的盐度低的盐度的水驱液体。