公开(公告)号：US20130168089A1

公开(公告)日：2013-07-04

申请号：US13729596

申请日：2012-12-28

Applicant: SHELL OIL COMPANY

Inventor： Steffen BERG ,  Raul Valdez ,  Jorge VIAMONTES ,  Paul Richard WEIDER

IPC: E21B43/16

CPC classification number: E21B43/16 ,  C09K8/588

Abstract: The present disclosure relates to enhanced oil recovery methods including the injection of solvent and polymer floods to increase hydrocarbon production from oil bearing underground rock formations. One method includes injecting a solvent slug into the underground formation for a first time period from a first well. The solvent slug solubilizes the oil and generates a mixture of mobilized oil and solvent. An aqueous polymer slug may then be injected into the underground formation for a second time from the first well. The polymer slug may have a viscosity greater than the solvent slug and thereby generates an interface between the solvent slug and the polymer slug. The solvent slug and the mobilized oil are then forced towards a second well using a buoyant hydrodynamic force generated by the aqueous polymer slug. Oil and/or gas may then be produced from the second well.

Abstract translation: 本公开涉及增强的油回收方法，包括注入溶剂和聚合物洪水以增加含油地下岩层的烃产量。 一种方法包括将溶剂块从第一井第一次注入地下地层。 溶剂块溶解油并产生动员的油和溶剂的混合物。 然后可以从第一井将水性聚合物块塞第二次注入地下地层。 聚合物团块可以具有比溶剂团块更大的粘度，从而在溶剂团块和聚合物团块之间产生界面。 然后使用由聚合物水性聚合物块产生的浮力流体动力将溶剂块和活化的油强制向第二井。 然后可以从第二个井产生油和/或气体。