发明授权
US4074759A Oil recovery process using a polymer slug with tapered surfactant
concentration
失效
使用具有锥形表面活性剂浓度的聚合物块塞的油回收过程
- 专利标题： Oil recovery process using a polymer slug with tapered surfactant concentration
- 专利标题（中）： 使用具有锥形表面活性剂浓度的聚合物块塞的油回收过程
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申请号： US724678申请日： 1976-09-20
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公开(公告)号： US4074759A公开(公告)日： 1978-02-21
- 发明人: Issam S. Bousaid
- 申请人： Issam S. Bousaid
- 申请人地址： NY New York
- 专利权人： Texaco Inc.
- 当前专利权人： Texaco Inc.
- 当前专利权人地址： NY New York
- 主分类号： C09K8/588
- IPC分类号： C09K8/588 ; E21B43/22
摘要：
A process for recovering oil from a subterranean reservoir in which a slug comprising an aqueous polymer solution containing a small amount of surfactant injected into the formation via an injection well is forced through the formation and oil is recovered via a production well penetrating the formation. In this process the concentration of the surfactant in the slug of the aqueous polymer solution is tapered by increasing the concentration of the surfactant either incrementally, gradually or by any other convenient method during the slug injection time.
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