公开(公告)号：US20070169938A1

公开(公告)日：2007-07-26

申请号：US11336475

申请日：2006-01-20

申请人： Alan Moorehead ,  William Shumway ,  Bradley Todd

发明人： Alan Moorehead ,  William Shumway ,  Bradley Todd

IPC分类号： E21B43/27 ,  E21B37/00

CPC分类号： C09K8/72 ,  C09K8/52

摘要： An improved acidization method is provided in which an aqueous solution comprising one or more esters or polyesters of lactic acid or of glycerol is placed in a well where the esters or polyesters undergo hydrolysis. The hydrolysis of the esters or polyesters occurs at a slower reaction rate than that of several other known acidization esters, such as diethyleneglycol diformate, at temperatures higher than 60° C. or even higher than 100° C. Thus, the solution may be distributed substantially throughout a region in the well where acidization is required before hydrolysis is completed, despite being exposed to relatively high temperatures. The hydrolysis may result in the slow release of an acid that is capable of consuming all or most of an undesirable substance in the well, e.g., a filter cake.

摘要翻译： 提供了一种改进的酸化方法，其中将包含一种或多种乳酸或甘油的酯或聚酯的水溶液置于酯或聚酯经历水解的孔中。 在高于60℃或甚至高于100℃的温度下，酯或聚酯的水解反应速度比几种其它已知的酸化酯如二甘醇二甲酸酯的反应速率慢。因此，溶液可以分布 基本上遍及在水解完成之前需要酸化的井中的一个区域，尽管暴露于相对较高的温度。 水解可能导致能够消耗井中所有或大部分不需要的物质的酸的缓慢释放，例如滤饼。

公开(公告)号：US20070173416A1

公开(公告)日：2007-07-26

申请号：US11336474

申请日：2006-01-20

申请人： Alan Moorehead ,  William Shumway ,  Bradley Todd

发明人： Alan Moorehead ,  William Shumway ,  Bradley Todd

IPC分类号： C09K8/84

CPC分类号： C09K8/72 ,  C09K8/52

摘要： An improved acidization solution is provided which comprises water and one or more esters or polyesters of hydroxy acid or of glycerol. The solution may include, for example, ethyl lactate and pure water or a brine. The hydrolysis of the esters or polyesters occurs at a slower reaction rate than that of several other known acidization esters, such as diethyleneglycol diformate, at temperatures higher than 60° C. or even higher than 100° C. Thus, the acidization solution may be distributed substantially throughout a region in a well where acidization is required before hydrolysis is completed, despite being exposed to relatively high temperatures. The hydrolysis may result in the slow release of an acid that is capable of consuming all or most of an undesirable substance in the well, e.g., a filter cake.

摘要翻译： 提供了一种改进的酸化溶液，其包含水和一种或多种羟基酸或甘油的酯或聚酯。 溶液可以包括例如乳酸乙酯和纯水或盐水。 在高于60℃或甚至高于100℃的温度下，酯或聚酯的水解反应速度比几种其它已知的酸化酯如二甘醇二甲酸酯的反应速率慢。因此，酸化溶液可以是 分布在水解完成之前基本上遍布在需要酸化的井中的一个区域中，尽管暴露于较高的温度。 水解可能导致能够消耗井中所有或大部分不需要的物质的酸的缓慢释放，例如滤饼。