申请人:Chevron U.S.A. Inc.
公开号:US10011757B2
公开(公告)日:2018-07-03
Aspects of the invention relate to compositions and methods that are used for the remediation of near-wellbore damage in regions of formations near injection wells in communication with subterranean reservoirs. The damage is caused by previous injection of a polymer emulsion into the injection well. A specific aspect is a method of injecting into the subterranean reservoir a composition containing an olefin sulfonate, a sulfosuccinate, and a chemical selected from an alcohol alkoxylated sulfate, an alcohol alkoxylated carboxylate, or a combination thereof. The polymer emulsion is thereby dissolved, cleaned and/or flushed away from the region near the injection well.
本发明的各个方面涉及用于修复与地下储层相通的注水井附近地层区域的近井筒损害的组合物和方法。损害是由于先前向注入井注入聚合物乳液造成的。一个具体方面是向地下储层注入一种组合物的方法,该组合物含有一种烯烃磺酸盐、一种磺基琥珀酸盐和一种选自醇烷氧基化硫酸盐、醇烷氧基化羧酸盐或其组合的化学品。聚合物乳液由此被溶解、清洗和/或冲离注入井附近区域。