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    • 9. 发明授权
    • Process for secondary recovery of hydrocarbons
    • 二次回收烃的方法
    • US4288334A
    • 1981-09-08
    • US112690
    • 1980-01-17
    • David R. McCoyCarter G. Naylor
    • David R. McCoyCarter G. Naylor
    • C09K8/594E21B43/22
    • C09K8/594Y10S507/936
    • Hydrocarbons are recovered from a subterranean hydrocarbon-bearing formation penetrated by an injection well and a production well by displacing hydrocarbons toward the production well using a drive fluid such as water containing dissolved therein:(a) a small amount of a nonionic surfactant of the formula RO(CH.sub.2 CH(OH)CH.sub.2 O).sub.m (CH.sub.2 CH.sub.2 O).sub.n H where R is alkyl or alkylaryl, n is an integer of from 1 to about 20 and m> 1, and(b) a small amount of an anionic sulfonate or sulfate surfactant. Optionally the drive fluid may be saturated with natural gas and/or carbon dioxide at the injection pressure. A polymeric thickening agent also may be included in the drive fluid, if desired.
    • 使用驱动流体例如含有溶解在其中的水将碳氢化合物置换成生产井,从注入井和生产井渗透的地下含烃地层中回收碳氢化合物:(a)少量式 RO(CH 2 CH(OH)CH 2 O)m(CH 2 CH 2 O)n H其中R是烷基或烷基芳基,n是1至约20的整数,m> 1,和(b)少量的阴离子磺酸盐或硫酸盐表面活性剂。 可选地,驱动流体可以在注射压力下被天然气和/或二氧化碳饱和。 如果需要,聚合增稠剂也可以包括在驱动流体中。