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    Sand control employing halogenated, oil soluble hydrocarbons
    4.
    发明授权
    Sand control employing halogenated, oil soluble hydrocarbons 失效
    使用卤化油溶性碳氢化合物控制砂

    公开(公告)号：US4494605A

    公开(公告)日：1985-01-22

    申请号：US329906

    申请日：1981-12-11

    申请人： John F. Wiechel ,  Charles R. French ,  Wilbur L. Hall

    发明人： John F. Wiechel ,  Charles R. French ,  Wilbur L. Hall

    IPC分类号： E21B43/02 ,  E21B43/04

    CPC分类号： E21B43/025 ,  E21B43/04

    摘要： This invention relates to a method for treating wells completed in subterranean formations which contain unconsolidated sand particles, so as to form a permeable barrier which will permit the flow of liquids therethrough while restraining the flow of the unconsolidated sand particles into the well bore. The method comprises saturating sand adjacent the well bore to be treated with petroleum having a high asphaltic content and thereafter contacting the asphaltic petroleum with a solvent capable of solubilizing non-asphaltic fractions of the petroleum and precipitating or causing deposition of the asphaltic or bituminous portions of the petroleum. A heated fluid such as steam is thereafter injected into the formation to cause solidification of the asphaltic materials which effectively binds the sand grains together to form a porous mass which will effectively restrain the movement of said particles in the well bore upon subsequently placing the well on production. Suitable materials for causing precipitation of the asphaltic or bituminous portion of the petroleum include halogen substituted, oil soluble hydrocarbons having at least one halogen substituent and having less than 6 carbon atoms per molecule, such as methyl chloroform. Steam or a mixture of steam and non-condensable gas such as nitrogen, or mixture of steam and air are then injected into the formation to dehydrate and otherwise solidify the precipitated asphaltic material.

    摘要翻译： 本发明涉及一种处理在地下地层中完成的含有未固结的砂粒的井的方法，以形成允许液体流过的可渗透屏障，同时限制未固结的砂粒流入井眼。 该方法包括使具有高沥青含量的石油在待处理的井眼周围使砂饱和，然后使沥青石油与能够溶解石油的非沥青馏分的溶剂接触，并沉淀或引起沥青或沥青部分的沉积 石油。 然后将诸如蒸汽的加热流体注入到地层中以引起沥青材料的固化，所述沥青材料有效地将砂粒结合在一起以形成多孔质量块，其随后将井放置在井上将有效地抑制所述颗粒在井眼中的移动 生产。 用于引起石油沥青或沥青部分沉淀的合适材料包括卤素取代的，具有至少一个卤素取代基且每分子碳原子少于6个碳原子的油溶性烃，例如甲基氯仿。 然后将蒸汽或蒸汽和不可冷凝气体如氮气或蒸汽和空气的混合物的混合物注入到地层中以使沉淀的沥青材料脱水或固化。