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1.发明授权
公开(公告)号：US4663367A
公开(公告)日：1987-05-05
申请号：US703201
申请日：1985-02-19
申请人： Martin Navratil , Mark S. Mitchell , Mojmir Sovak
发明人： Martin Navratil , Mark S. Mitchell , Mojmir Sovak
CPC分类号： C09K8/90 , C09K8/5086
摘要： Compositions and methods are used for reducing the permeability of high fluid permeability segments of underground strata, the compositions being injected into the high permeability segments in liquid form and there gelled to reduce the permeability of the segments. A first group of compositions has a pH of at least 4 and comprises a sulfited derivative of a tannin extract together with furfural, formaldehyde or a formaldehyde derivative. The second group of compositions comprises furfural and a gellable vegetable material which can be a tannin extract, a sulfited derivative of a tannin extract, a catechin, an alkaline extract of a coniferous bark or a lignin or sulfonated lignin derivative.
摘要翻译： 组合物和方法用于降低地下层高流体渗透性段的渗透性，将组合物以液体形式注入高渗透性区段，并凝胶化以降低区段的渗透性。 第一组组合物的pH至少为4，并且包含鞣酸提取物的亚硫酸衍生物以及糠醛，甲醛或甲醛衍生物。 第二组组合物包括糠醛和可凝胶的植物材料，其可以是单宁提取物，单宁提取物的亚硫酸衍生物，儿茶素，针叶树皮的碱性提取物或木质素或磺化木质素衍生物。
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2.发明授权
公开(公告)号：US4858693A
公开(公告)日：1989-08-22
申请号：US38602
申请日：1987-04-15
申请人： Martin Navratil , Mark S. Mitchell , Mojmir Sovak
发明人： Martin Navratil , Mark S. Mitchell , Mojmir Sovak
CPC分类号： C09K8/90 , C09K8/5086
摘要： Compositions and methods are used for reducing the permeability of high fluid permeability segments of underground strata, the compositions being injected into the high permeability segments in liquid form and there gelled to reduce the permeability of the segments. A first group of compositions has a pH of at least 4 and comprises a sulfited derivative of a tannin extract together with furfural, formaldehyde or a formaldehyde derivative. The second group of compositions comprises furfural and a gellable vegetable material which can be a tannin extract, a sulfited derivative of a tannin extract, a catechin, an alkaline extract of a coniferous bark or a lignin or sulfonated lignin derivative.
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公开(公告)号：US4424300A
公开(公告)日：1984-01-03
申请号：US427858
申请日：1982-09-29
CPC分类号： C08J3/122 , C08G8/08 , C08L61/06 , C08J2361/06 , C08L97/02 , Y10S525/934
摘要： Phenol-formaldehyde resin powder capable of both heat softening and fast-cure is produced by spray drying a blend of resole and novolac prepolymers. The powder, when mixed, heated and pressed with wax-coated wood chips, flows and cures to form a superior, bonded flake waferboard.
摘要翻译： 能够同时进行热软化和快速固化的苯酚 - 甲醛树脂粉末是通过喷雾干燥甲阶酚醛树脂和酚醛清漆预聚物的混合物来制备的。 粉末当混合时，用蜡涂木片加热和压制，流动和固化以形成优良的粘结薄片晶片板。
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4.发明授权
公开(公告)号：US4836285A
公开(公告)日：1989-06-06
申请号：US191690
申请日：1988-05-09
申请人： Martin Navratil , Mark S. Mitchell , Mojmir Sovak
发明人： Martin Navratil , Mark S. Mitchell , Mojmir Sovak
CPC分类号： C09K8/90 , C09K8/514 , Y10S507/902 , Y10S507/903 , Y10S507/935
摘要： 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.
摘要翻译： 本发明提供了一种通过将该区域插入层中的可凝胶溶液，通过将该区域插入到层中，从具有高流体渗透性的区域的含油层中提高油的回收方法，该溶胶在中等高的操作温度 该层包含多酚木质素提取物，甲醛源和足够的碱性材料，以产生pH至少为9.0的溶液，并且在较高操作温度的情况下，其包含木质素磺酸盐和含水的甲醛或单宁源 解。
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5.发明授权
公开(公告)号：US4811787A
公开(公告)日：1989-03-14
申请号：US154467
申请日：1988-02-08
IPC分类号： C09K8/508 , C09K8/514 , E21B33/138 , E21B43/22
CPC分类号： C09K8/514 , C09K8/5086
摘要： The invention provides a method for the secondary recovery of oil from an oil-bearing stratum having a zone of high fluid permeability, in which this zone is plugged by introducing into the stratum a gelable solution comprising an alkaline material, a polyphenolic vegetable material such as mimosa tannin extract and formaldehyde, the last compound being present as free formaldehyde, paraformaldehyde, a phenol-formaldehyde resole, hexamethylenetetramine or urea-formaldehyde concentrate. The gelable solution has a pH of at least 9.5 and may optionally include a viscosifier. The gelable solutions are relatively insensitive to brines or temperature and gel to produce mechanically strong gels, even in the presence of oil-wet minerals. If desired, the alkaline material can be an alkali metal carbonate, and the use of such carbonates permits the permeability of the plugged high permeability zone to be adjusted after formation of the gel by treating the gel with acid.
摘要翻译： 本发明提供了一种用于从具有高流体渗透性区域的含油层次级回收油的方法，其中该区域通过将包含碱性物质的可凝胶溶液，诸如 含羞草单宁提取物和甲醛，最后一种化合物以游离甲醛，多聚甲醛，苯酚 - 甲醛甲阶酚醛，六亚甲基四胺或脲 - 甲醛浓缩物存在。 胶凝溶液的pH值至少为9.5，并且可以任选地包括增粘剂。 即使在存在油湿矿物的情况下，胶凝剂对盐水或温度和凝胶相对不敏感以产生机械强烈的凝胶。 如果需要，碱性材料可以是碱金属碳酸盐，并且使用这种碳酸盐可以通过用酸处理凝胶来形成凝胶后调节堵塞的高渗透性区域的渗透性。
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6.发明授权
公开(公告)号：US4743633A
公开(公告)日：1988-05-10
申请号：US746540
申请日：1985-07-15
申请人： Martin Navratil , Mark S. Mitchell , Mojmir Sovak
发明人： Martin Navratil , Mark S. Mitchell , Mojmir Sovak
CPC分类号： C09K8/90 , C09K8/514 , Y10S507/902 , Y10S507/903 , Y10S507/935
摘要： 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.
摘要翻译： 本发明提供了一种通过将该区域插入层中的可凝胶溶液，通过将该区域插入到层中，从具有高流体渗透性的区域的含油层中提高油的回收方法，该溶胶在中等高的操作温度 该层包含多酚木质素提取物，甲醛源和足够的碱性材料，以产生pH至少为9.0的溶液，并且在较高操作温度的情况下，其包含木质素磺酸盐和含水的甲醛或单宁源 解。
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