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    Method and composition for acidizing and fracturing wells
    3.
    发明授权
    Method and composition for acidizing and fracturing wells 失效
    酸化和压裂井的方法和组成

    公开(公告)号：US3923666A

    公开(公告)日：1975-12-02

    申请号：US33615073

    申请日：1973-02-26

    申请人： HALLIBURTON CO

    发明人： DILL WALTER R

    IPC分类号： C09K8/62 ,  C09K8/72 ,  C09K17/48 ,  C09K3/00

    CPC分类号： C09K8/76 ,  C08K3/16 ,  C08K5/07 ,  C09K8/86 ,  C09K8/882 ,  Y10S507/922 ,  Y10S507/933 ,  C08L33/26

    摘要： A method of acidizing or fracturing subterranean formations comprising injecting into the formation, a composition consisting essentially of a stable acidic gel made by the process of adding from about 25 to about 150 pounds of a linear polyacrylamide having a molecular weight of from about 1 to about 50 million to each 1000 gallons of an aqueous hydrochloric acid solution containing from about 25 to about 35 weight percent of hydrochloric acid. In another method of practicing the invention, the viscosity of the gelled acid is increased prior to injection into the formation by adding to the gel, an aldehyde compound soluble in aqueous solutions. An amount of the aldehyde equivalent to from about 0.01 to about 1.5 weight percent of aldehyde (based on the weight of hydrochloric acid used) is employed. Where this method of practicing the invention is used, the starting acid solution may have a concentration as low as 1 weight percent.

    摘要翻译： 一种酸化或压裂地下地层的方法，包括向地层中注入基本上由稳定的酸性凝胶组成的组合物，该组合物通过加入约25至约150磅的分子量为约1至约 每1000加仑含有约25-35％（重量）盐酸的盐酸水溶液。 在实施本发明的另一种方法中，通过向凝胶中注入可溶于水溶液的醛化合物，在注入地层之前，胶凝酸的粘度增加。 使用相当于醛的约0.01至约1.5重量％的醛的量（基于所用盐酸的重量）。 在使用本发明的实施方法的情况下，起始酸溶液的浓度可以低至1重量％。