发明名称 |
COMPOSITIONS AND METHODS FOR REDUCING THE PERMEABILITY OF UNDERGROUND STRATA |
摘要 |
<p>The invention provides a method for the enhanced recovery of oil from an oil-bearing stratum having a zone of high fluid permeability through plugging of this zone by introducing into the stratum a gelable solution which, in the case of use under moderately high operating temperatures in the stratum, comprises a polyphenolic lignin extract, a formaldehyde source and sufficient alkaline material to give a solution having a pH of at least 9.0 and which, in the case of higher operating temperatures, comprises a lignosulfonate and a source of formaldehyde or tannin in aqueous solution.</p> |
申请公布号 |
CA1217932(A) |
申请公布日期 |
1987.02.17 |
申请号 |
CA19830441430 |
申请日期 |
1983.11.18 |
申请人 |
BORDEN COMPANY, LIMITED (THE) |
发明人 |
NAVRATIL, MARTIN;MITCHELL, MARK S.;SOVAK, MOJMIR |
分类号 |
C09K8/514;C09K8/90;(IPC1-7):E21B33/138;C09K7/02 |
主分类号 |
C09K8/514 |
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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