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22 条记录 (耗时 0.021 秒)

    Permeability reduction in subterranean reservoirs
    2.
    发明授权
    Permeability reduction in subterranean reservoirs 失效
    地下水库渗透率降低

    公开(公告)号：US4413680A

    公开(公告)日：1983-11-08

    申请号：US332940

    申请日：1981-12-21

    申请人： Burton B. Sandiford ,  Hoai T. Dovan ,  Richard D. Hutchins

    发明人： Burton B. Sandiford ,  Hoai T. Dovan ,  Richard D. Hutchins

    IPC分类号： C09K8/512 ,  C09K8/588 ,  E21B43/22 ,  E21B33/138

    CPC分类号： C09K8/588 ,  C09K8/512

    摘要： A method for selectively reducing the permeability of the higher permeability zones of a subterranean reservoir having heterogeneous permeability, such permeability reduction occurring a substantial distance away from a well in which there is injected into the reservoir an aqueous solution or solutions of a water-soluble polymer, a material capable under certain conditions of at least partially cross-linking the polymer to form a gelatinous precipitate, and a water-soluble alkaline material in an amount sufficient to maintain the pH of the polymer-containing composition above about 9 until the composition has passed a substantial distance through the reservoir.

    摘要翻译： 一种用于选择性地降低具有不均匀渗透性的地下储层的较高渗透率区域的渗透性的方法，这种渗透率降低与远离其中注入储层的井相当距离发生水溶液或水溶性聚合物溶液 ，在某些条件下能够使聚合物至少部分交联以形成凝胶状沉淀物的材料，以及水溶性碱性材料，其量足以将含聚合物的组合物的pH保持在约9以上，直到组合物具有 通过水库通过了相当远的距离。

    Method for selectively reducing subterranean water permeability
    4.
    发明授权
    Method for selectively reducing subterranean water permeability 失效
    选择性降低亚硫酸盐渗透性的方法

    公开(公告)号：US5145012A

    公开(公告)日：1992-09-08

    申请号：US631863

    申请日：1990-12-21

    申请人： Richard D. Hutchins ,  Burton B. Sandiford ,  Hoai T. Dovan

    发明人： Richard D. Hutchins ,  Burton B. Sandiford ,  Hoai T. Dovan

    IPC分类号： C09K8/50 ,  C09K8/60 ,  E21B43/26

    CPC分类号： E21B43/261 ,  C09K8/50 ,  C09K8/60

    摘要： Gels containing gas precursors and/or pathways are used to selectively reduce the flow of aqueous fluids with respect to the flow of nonaqueous fluids to enhance the recovery of the nonaqueous fluids from subterranean formations. The gels, while stable at reservoir conditions, are also readily degraded by gel degrading agents such as acids and therefore are also employed as fail-safe gels in subterranean gel treatments. In another embodiment, selective permeability is restored to a previously treated well by injecting a gas into the previous treated portions of the subterranean formation to displace any aqueous fluid obstructing the passage of the nonaqueous fluid through the polymer-coated pores or gel.

    摘要翻译： 含有气体前体和/或途径的凝胶用于选择性地减少水流体相对于非水流体的流动，以增强从地下地层中回收非水流体。 凝胶在储层条件下稳定也容易被凝胶降解剂（如酸）降解，因此也被用作地下凝胶处理中的故障安全凝胶。 在另一个实施方案中，通过将气体注入到地下地层的先前处理的部分中以将任何含水流体阻挡非水流体通过聚合物涂覆的孔或凝胶的位置，将选择性渗透性恢复到预先处理的井。

    Method for modifying gelation time of organically crosslinked, aqueous gels
    5.
    发明授权
    Method for modifying gelation time of organically crosslinked, aqueous gels 失效
    改进有机交联水凝胶凝胶化时间的方法

    公开(公告)号：US5617920A

    公开(公告)日：1997-04-08

    申请号：US361431

    申请日：1994-12-21

    申请人： Hoai T. Dovan ,  Burton B. Sandiford ,  Richard D. Hutchins

    发明人： Hoai T. Dovan ,  Burton B. Sandiford ,  Richard D. Hutchins

    IPC分类号： B01J13/00 ,  C08F8/00 ,  C09K8/512 ,  C09K8/68 ,  C09K8/88 ,  C09K8/94 ,  E21B33/13

    CPC分类号： C09K8/887 ,  B01J13/0065 ,  C08F8/32 ,  C09K8/512 ,  C09K8/685 ,  C09K8/94 ,  Y10S507/903 ,  Y10S524/916

    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.degree. C. (120.degree. 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.

    摘要翻译： 通过降低pH和/或增加其中聚合物与有机物反应的水性反应介质的单价和/或二价阳离子浓度的盐来增强凝胶性质（例如，更快的凝胶时间，更高的凝胶强度） 交联剂。 此外，在将组合物注入地下地层之前，通过将组合物加热到约48.9℃（120°F）以下，包含聚合物和有机交联剂的水性组合物的凝胶化时间被减少。 或者，通过在组合物中加入pH增加剂来增加水性组合物的凝胶化时间。

    Gel-forming composition
    8.
    发明授权
    Gel-forming composition 失效
    凝胶形成组合物

    公开(公告)号：US5268112A

    公开(公告)日：1993-12-07

    申请号：US870484

    申请日：1992-04-16

    申请人： Richard D. Hutchins ,  Burton B. Sandiford ,  Hoai T. Dovan

    发明人： Richard D. Hutchins ,  Burton B. Sandiford ,  Hoai T. Dovan

    IPC分类号： C09K8/50 ,  C09K8/60 ,  E21B43/26 ,  E21B33/138 ,  E21B43/22

    CPC分类号： C09K8/50 ,  C09K8/60 ,  E21B43/261 ,  Y10S507/935

    摘要： Gels containing gas precursors and/or pathways are used to selectively reduce the flow of aqueous fluids with respect to the flow of nonaqueous fluids to enhance the recovery of the nonaqueous fluids from subterranean formations. The gels, while stable at reservoir conditions, are also readily degraded by gel degrading agents such as acids and therefore are also employed as fail-safe gels in subterranean gel treatments. In another embodiment, selective permeability is restored to a previously treated well by injecting a gas into the previous treated portions of the subterranean formation to displace any aqueous fluid obstructing the passage of the nonaqueous fluid through the polymer-coated pores or gel.

    摘要翻译： 含有气体前体和/或途径的凝胶用于选择性地减少水流体相对于非水流体的流动，以增强从地下地层中回收非水流体。 凝胶在储层条件下稳定也容易被凝胶降解剂（如酸）降解，因此也被用作地下凝胶处理中的故障安全凝胶。 在另一个实施方案中，通过将气体注入到地下地层的先前处理的部分中以将任何含水流体阻挡非水流体通过聚合物涂覆的孔或凝胶的位置，将选择性渗透性恢复到预先处理的井。