公开(公告)号：US20050194147A1

公开(公告)日：2005-09-08

申请号：US10871108

申请日：2004-06-18

申请人： Arthur Mctcalf ,  Joel Boles ,  Carson Parker

发明人： Arthur Mctcalf ,  Joel Boles ,  Carson Parker

IPC分类号： C09K8/528 ,  C09K8/72 ,  E21B21/14 ,  E21B37/00 ,  E21B37/06 ,  E21B43/26 ,  E21B43/27 ,  E21B43/28

CPC分类号： C09K8/528 ,  C09K8/72 ,  Y10S166/902 ,  Y10S507/923 ,  Y10S507/934

摘要： A method for removing or dissolving calcareous materials in a subterranean formation or in a wellbore consists of two basic steps. In the first step, an aqueous acid solution is injected into the formation or wellbore. The aqueous acid solution contains between from about 15 to about 99 weight percent of an organic acid selected from formic acid, acetic acid or a mixture of formic acid and acetic acid. Water or brine is then injected into the formation or wellbore. The amount of water or brine injected into the formation or wellbore is an amount sufficient to reduce the concentration of organic acid in the formation or wellbore to no greater than 10 weight percent.

摘要翻译： 在地层或井眼中去除或溶解钙质材料的方法由两个基本步骤组成。 在第一步中，将酸水溶液注入地层或井眼。 酸水溶液含有约15至约99重量％的选自甲酸，乙酸或甲酸和乙酸的混合物的有机酸。 然后将水或盐水注入地层或井眼。 注入地层或井筒的水或盐水的量是足以将地层或井眼中的有机酸浓度降低到不大于10重量％的量。