公开(公告)号：WO2014151197A1

公开(公告)日：2014-09-25

申请号：PCT/US2014/025193

申请日：2014-03-13

Applicant: VEOLIA WATER SOLUTIONS & TECHNOLOGIES NORTH AMERICA, INC.

Inventor： HIGGINS, Richard ,  SMITH, Stanton ,  BISHOP, Bruce ,  GAMACHE, David

IPC: B01D61/14 ,  B01D65/02 ,  B01D65/08 ,  C02F1/40 ,  E21B43/00

CPC classification number: E21B43/34 ,  B01D61/147 ,  B01D65/02 ,  B01D65/08 ,  B01D71/02 ,  B01D2321/04 ,  B01D2321/08 ,  B01D2321/162 ,  B01D2321/164 ,  B01D2321/168 ,  B01D2321/2066 ,  C02F1/444 ,  C02F1/66 ,  C02F5/06 ,  C02F2101/32 ,  C02F2103/10 ,  C02F2209/02 ,  C02F2303/16

Abstract: A method of recovering oil from an oil well includes recovering an oil-water mixture from the oil well and separating produced water from the oil-water mixture. Thereafter, the produced water is directed through a ceramic membrane that removes free oil and emulsified oil from the produced water. The method or process further includes cleaning the ceramic membrane in online and offline modes. In the offline mode, cleaning is achieved by periodically backflushing the ceramic membrane with an aqueous media having a pH of 13 or greater and a temperature of 60°C or greater. Further, the ceramic membrane is cleaned in the offline mode by applying the following operations. In one or more clean-in-place operations, an aqueous alkaline media at a pH of 13 or higher and a temperature of 60°C or higher is directed through the ceramic membrane. In one or more clean-in-place operations, the ceramic membrane is also cleaned with an aqueous acidic media that contains dissolved citric acid. Finally, in one or more clean- in-place operations, a liquid hydrocarbon is directed through the ceramic membrane.

Abstract translation: 从油井中回收油的方法包括从油井中回收油 - 水混合物并从油 - 水混合物中分离产生的水。 此后，将生成的水引导通过陶瓷膜，从生产的水中除去游离油和乳化油。 该方法或方法还包括在在线和离线模式下清洁陶瓷膜。 在离线模式下，通过用pH为13以上且温度为60℃以上的水性介质周期性地反吹陶瓷膜来实现清洗。 此外，通过应用以下操作在离线模式下清洁陶瓷膜。 在一个或多个现场清洁操作中，pH为13或更高，温度为60℃或更高的水性碱性介质通过陶瓷膜。 在一个或多个现场清洁操作中，陶瓷膜也用含有溶解柠檬酸的酸性介质水溶液清洗。 最后，在一个或多个清洁就地操作中，液体烃被引导通过陶瓷膜。