Process for transporting particles in a porous medium
    1.
    发明授权
    Process for transporting particles in a porous medium 失效
    在多孔介质中输送颗粒的方法

    公开(公告)号:US5299638A

    公开(公告)日:1994-04-05

    申请号:US849367

    申请日:1992-06-02

    摘要: The invention relates to an improved method for injecting and transporting small particles in a natural porous medium. The method is characterized in that, in a first step, the porous medium is conditioned by means of an aqueous solution containing a hydrocarbonaceous compound, polymers or surface-active agents, in a second step, a plug of suspended particles is injected in the aqueous medium containing at least one hydrocarbonaceous compound, polymer or surface-active agent and, in a third step, the plug of particles is pushed by an appropriate aqueous medium. The method is particularly useful for implantation of bacteria in a porous medium.

    摘要翻译: PCT No.PCT / FR90 / 00802 Sec。 371日期:1992年6月2日 102(e)日期1992年6月2日PCT提交1990年7月9日PCT公布。 公开号WO91 / 07570 日期:1991年5月30日本发明涉及一种在天然多孔介质中注入和输送小颗粒的改进方法。 该方法的特征在于,在第一步骤中,多孔介质通过含有烃类化合物的水溶液,聚合物或表面活性剂进行调节,在第二步骤中,将悬浮颗粒的塞子注入含水 含有至少一种含烃化合物,聚合物或表面活性剂的介质,并且在第三步骤中,通过合适的水性介质推动颗粒塞。 该方法对于在多孔介质中植入细菌特别有用。

    Prevention of Water and Condensate Blocks in Wells
    2.
    发明申请
    Prevention of Water and Condensate Blocks in Wells 审中-公开
    预防井中的水和冷凝块

    公开(公告)号:US20070029085A1

    公开(公告)日:2007-02-08

    申请号:US11460843

    申请日:2006-07-28

    IPC分类号: E21B43/22 E21B43/25

    摘要: Compositions and methods are given to prevent, alleviate and remedy water blocks and gas blocks (condensate block or condensate banking). Wettability modifiers are contacted with the formation to change the surfaces from water wet or oil wet to intermediate wet or gas wet. Preferred wettability modifiers include partially or completely fluorinated surfactants or polymers, for example fluorosilanes such as perfluorosilanes, urethane oligomers containing perfluoro alkyl moieties, fluoroacrylates, and fluoroalkyl containing terpolymers or their mixtures. Other examples include surfactants, for example viscoelastic surfactants such as cationic surfactants such as quaternary amines, and zwitterionic surfactants, such as betaines, optionally mixed with co-surfactants.

    摘要翻译: 给出了组合和方法,以防止,减轻和补救水块和瓦斯块(冷凝物块或冷凝物)。 润湿性调节剂与地层接触,以将表面从湿润的或油的湿润变为中间的湿气或湿气。 优选的润湿性改性剂包括部分或完全氟化的表面活性剂或聚合物,例如氟硅烷如全氟硅烷,含全氟烷基部分的氨基甲酸酯低聚物,氟代丙烯酸酯和含氟烷基的三元共聚物或其混合物。 其它实例包括表面活性剂,例如粘弹性表面活性剂,例如阳离子表面活性剂如季胺,和两性离子表面活性剂,如甜菜碱,任选与辅助表面活性剂混合。