发明名称 |
Well treating composition and method |
摘要 |
There is disclosed a method of treating a subterranean substantially carbonate-free sandstone formation associated with a well completed in said substantially carbonate-free sandstone formation comprising displacing into said formation through said well an effective amount of an acidic aqueous solution comprising from about 5 to about 36 weight % phosphoric acid, from about 0.6 to about 5 weight % of a highly polar surface active agent which is a citric acid-monoethanolamine elimination reaction product, and an effective amount of a ferrous metal corrosion inhibitor. For treating a subterranean limestone or dolomitic formation or a sandstone formation having a substantial carbonate content there is additionally included in the acidic aqueous solution an amount of a phosphate crystal modifying agent sufficient to control crystal growth, minimize crystal agglomeration and minimize crystal adhesion to the formation. The acidic aqueous solutions exhibit clay shrinking and/or stabilizing properties and a lengthy spending time relative to that of conventional hydrochloric acid-based acidizing compositions.
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申请公布号 |
US4605068(A) |
申请公布日期 |
1986.08.12 |
申请号 |
US19810331761 |
申请日期 |
1981.12.17 |
申请人 |
AMERIGO TECHNOLOGY LIMITED |
发明人 |
YOUNG, PETER J.;ROMOCKI, JULIAN M. E. |
分类号 |
C09K8/54;C09K8/74;E21B43/114;E21B43/119;(IPC1-7):E21B43/26;E21B43/27 |
主分类号 |
C09K8/54 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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