发明名称 |
Method for scale inhibition in oil producing wells |
摘要 |
A method for inhibiting scale formation in oil producing wells. The method comprises pretreating the rock formation of the near well bore area with a surface agent and then a saline solution by injecting these down the well bore. Subsequently the formation is treated with a source of divalent cations such as calcium. An acid inhibitor in the form of a polyacrylic acid derivative, a phosphonated or a phosphinopolycarboxylic acid is then injected into the rock formation and allowed to soak in for a period of 24 hours. The inhibitor is retained on the surface area of the rock formation by means of divalent cationic bonds.
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申请公布号 |
US5090479(A) |
申请公布日期 |
1992.02.25 |
申请号 |
US19900545712 |
申请日期 |
1990.06.29 |
申请人 |
DEN NORSKE STATS OLJESELSKAP A.S. |
发明人 |
READ, PETER A.;SCHMIDT, TERJE |
分类号 |
C09K8/528;E21B43/22 |
主分类号 |
C09K8/528 |
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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