发明名称 |
Method for modifying gelation time of organically crosslinked, aqueous gels |
摘要 |
Enhanced gel properties (e.g., faster gel time, higher attainable gel strengths) are achieved by reducing the pH and/or increasing the salt of a monovalent and/or divalent cation concentration of an aqueous reaction medium in which a polymer is reacted with an organic crosslinking agent. In addition, the gelation time of an aqueous composition comprising a polymer and an organic crosslinking agent is reduced by heating the composition above about 48.9 DEG C. (120 DEG F.) prior to injecting the composition into a subterranean formation. Alternatively, the gelation time of the aqueous composition is increased by incorporating a pH increasing agent into the composition.
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申请公布号 |
US5617920(A) |
申请公布日期 |
1997.04.08 |
申请号 |
US19940361431 |
申请日期 |
1994.12.21 |
申请人 |
UNION OIL COMPANY OF CALIFORNIA |
发明人 |
DOVAN, HOAI T.;SANDIFORD, BURTON B.;HUTCHINS, RICHARD D. |
分类号 |
B01J13/00;C08F8/00;C09K8/512;C09K8/68;C09K8/88;C09K8/94;(IPC1-7):E21B33/13 |
主分类号 |
B01J13/00 |
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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