发明名称 |
Oil reservoir permeability profile control with crosslinked welan gum biopolymers |
摘要 |
A composition capable of selectively plugging highly permeable zones in a subterranean formation. The composition forms a gel subsequent to its injection into the formation via an injection wall. The composition comprises an aqueous solution of a welan gum heteropolysaccharide biopolymer produced by the fermentation of a microorganism of the genus Alcaligenes, a phenolic compound, an aldehyde and water. The compositions of this invention will form stable gels even in low salinity brines. Also provided is a process for selectively plugging regions of higher permeability within an oil-bearing subterranean formation to improve sweep efficiency during a fluid flood oil recovery process using the gel-forming compositions of this invention.
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申请公布号 |
US4991652(A) |
申请公布日期 |
1991.02.12 |
申请号 |
US19890380348 |
申请日期 |
1989.07.17 |
申请人 |
MOBIL OIL CORPORATION |
发明人 |
HOSKIN, DENNIS H.;MITCHELL, THOMAS O.;SHU, PAUL |
分类号 |
C09K8/08;C09K8/514;C09K8/90 |
主分类号 |
C09K8/08 |
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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