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公开(公告)号:US07458424B2
公开(公告)日:2008-12-02
申请号:US11740346
申请日:2007-04-26
IPC分类号: E21B33/13
CPC分类号: C09K8/5045 , C09K8/506 , C09K8/516
摘要: A delayed gelling system useful in conformance control in the production of petroleum from subterranean formations, especially low permeability formations, is disclosed. The gelling system comprises a basic silica sol, an activator comprising a hydroxyl donor, and an optional syneresis inhibitor. In the disclosed method of using the gelling system, the gelling system may be pumped into formations with excessive water and/or gas production and thermally activated in the formation at downhole conditions to form a hard gel to reduce water and/or gas production.
摘要翻译: 公开了一种用于从地下地层,特别是低渗透性地层生产石油的一致性控制中的延迟胶凝体系。 胶凝体系包括碱性硅溶胶,包含羟基供体的活化剂和任选的脱水收缩抑制剂。 在所公开的使用胶凝体系的方法中,胶凝体系可以被泵送到具有过多的水和/或气体产生的结构中并且在井下条件下在地层中热激活以形成硬凝胶以减少水和/或气体的产生。