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    Aqueous gellable composition with delayed gelling time
    8.
    发明授权
    Aqueous gellable composition with delayed gelling time 失效
    具有延迟胶凝时间的水凝胶组合物

    公开(公告)号：US5338465A

    公开(公告)日：1994-08-16

    申请号：US853839

    申请日：1992-03-19

    申请人： Thomas P. Lockhart ,  Paola Albonico

    发明人： Thomas P. Lockhart ,  Paola Albonico

    IPC分类号： B01J13/00 ,  C07F11/00 ,  C09K3/00 ,  C09K8/512 ,  C09K8/58 ,  C09K8/88 ,  E02D3/12 ,  E21B33/138 ,  E21B33/13

    CPC分类号： C09K8/887 ,  C07F11/005 ,  C09K8/512 ,  Y10S507/935

    摘要： An aqueous gellable composition having a delayed gelling time presettable within wide time and temperature ranges, contains a water-soluble organic polymer crosslinkable with chrome ion and a crosslinking/retardant system definable by the formula:Cr(L).sub.m.nL'wherein:Cr is a trivalent chrome ion;L is an organic ligand consisting of a monocarboxylate or dicarboxylate ion, optionally bearing one or more amino or hydroxy functional group(s), in form complexed with chrome ion;L' is an organic ligand consisting of a monocarboxy or dicarboxy acid, optionally bearing one or more amino or hydroxy functional group(s), in form not complexed with chrome ion;m has a value comprised within the range of from 1 to 3, depending on the nature of the ligand L;n has a value comprised within the range of from 0.5 to 100;with the proviso that in the crosslinking/retardant system, the ligand L is different from the ligand L'.

    摘要翻译： 具有在宽时间和温度范围内预设的延迟凝胶时间的水性胶凝组合物含有可与铬离子交联的水溶性有机聚合物和可由下式定义的交联/阻燃体系：Cr（L）m.nL'其中：Cr 是三价铬离子; L是由单羧酸盐或二羧酸盐离子组成的有机配体，任选地带有与铬离子络合的形式的一个或多个氨基或羟基官能团; L'是由单羧基或二羧酸组成的有机配体，任选地带有一个或多个氨基或羟基官能团，其形式与铬离子不络合; 取决于配体L的性质，m具有在1至3范围内的值; n具有在0.5至100范围内的值; 条件是在交联/阻聚体系中，配体L与配体L'不同。

    Gellable aqueous composition and its use in enhanced petroleum recovery
    9.
    发明授权
    Gellable aqueous composition and its use in enhanced petroleum recovery 失效
    胶凝水性组合物及其在提高石油采收率中的应用

    公开(公告)号：US5219476A

    公开(公告)日：1993-06-15

    申请号：US845606

    申请日：1992-03-04

    申请人： Thomas P. Lockhart ,  Giovanni Burrafato

    发明人： Thomas P. Lockhart ,  Giovanni Burrafato

    IPC分类号： C09K8/512 ,  C09K8/88

    CPC分类号： C09K8/887 ,  C09K8/512 ,  Y10S507/903 ,  Y10S507/935

    摘要： The permeability of high-permeability zones in a oil reservoir can be reduced by using a gellable aqueous composition with delayed gelation. The composition comprises:a) water;b) a high-molecular weight natural or synthetic water-soluble polymer cross-linkable by means of Cr.sup.3+ ions;c) a water-soluble inorganic Cr.sup.3+ salt;d) a gelation-retardant organic ligand definable by the formula: ##STR1## where: R is a direct single bond, or a saturated or unsaturated linear or branched aliphatic hydrocarbon radical with from 1 to 6 carbon atoms, or a cycloalkyl radical with from 3 to 7 carbon atoms, or an aryl radical;X is OH or OR' (where R' is an alkyl radical with from 1 to 5 carbon atoms), or NR"R"' (where R" and R"', which may be equal or different, are H or an alkyl radical with from 1 to 5 carbon atoms); and relative water-soluble salts;the polymer b) being present in a concentration of between 1000 and 50,000 ppm; the salt c) being present in a concentration of between 10 and 5000 ppm evaluated as metal; the polymer/Cr.sup.3+ weight ratio varying from 1:1 to 1000:1; the molar organic ligand/Cr.sup.3+ ratio varying from 0.5 to 500:1; the composition having a pH equal to or less than about 7.0.

    摘要翻译： 通过使用具有延迟凝胶化作用的胶凝水性组合物可以降低油藏中高渗透性区域的渗透性。 组合物包括：a）水; b）通过Cr3 +离子可交联的高分子量天然或合成水溶性聚合物; c）水溶性无机Cr 3+盐; d）可由下式定义的凝胶阻滞有机配体：其中：R是直接单键，或具有1至6个碳原子的饱和或不饱和直链或支链脂族烃基，或具有 3至7个碳原子，或芳基; X是OH或OR'（其中R'是具有1至5个碳原子的烷基）或NR“R”'（其中R“和R”'可以相同或不同， H或具有1至5个碳原子的烷基）; 和相对的水溶性盐; 聚合物b）以1000至50,000ppm的浓度存在; 盐c）以金属计，以10至5000ppm的浓度存在; 聚合物/ Cr 3+重量比从1:1至1000:1变化; 有机配体/ Cr 3+摩尔比为0.5-500:1; 该组合物具有等于或小于约7.0的pH。