公开(公告)号：US3709297A

公开(公告)日：1973-01-09

申请号：US3709297D

申请日：1970-12-28

Applicant: TEXACO INC

Inventor： CHRISTOPHER C ,  GRIMM H ,  NUTE A

IPC: C09K8/58 ,  E21B43/22

CPC classification number: C09K8/588 ,  C09K8/584

Abstract: An improved oil recovery method is disclosed in which a slug of a dilute aqueous polymer solution is injected into a subterranean oil-containing formation through one or more injection wells followed by a slug of dilute aqueous solution of an alkali metal hypochlorite. Optionally, either or both of the injected solutions may contain a surfactant. In a final step, water is injected to drive the polymer and hypochlorite solutions through the formation and oil is recovered from the formation through at least one spaced production well.

Abstract translation: 公开了一种改进的油回收方法，其中通过一个或多个注入井，然后是碱金属次氯酸盐的稀的水溶液的一段，稀释的含水聚合物溶液的块被注入到地下含油地层中。 任选地，注入的溶液中的任一种或两者可以含有表面活性剂。 在最后一步中，注入水以通过地层驱动聚合物和次氯酸盐溶液，并通过至少一个间隔的生产井从地层回收油。