Method of Heterogeneous Etching of Sandstone Formations
    13.
    发明申请
    Method of Heterogeneous Etching of Sandstone Formations 审中-公开
    砂岩地层异质蚀刻方法

    公开(公告)号:US20080314594A1

    公开(公告)日:2008-12-25

    申请号:US11767589

    申请日:2007-06-25

    CPC classification number: C09K8/72

    Abstract: The invention provides a method of treating a sandstone-containing subterranean formation penetrated by a wellbore. The method is carried out by forming a slurry of a carrier fluid containing a viscosifying agent and encapsulated particles of a hydrogen fluoride source without settling of the particles. The carrier fluid may be an acid-based carrier fluid. The encapsulated hydrogen fluoride source may be encapsulated with a solid polymer acid precursor. The hydrogen fluoride source is present within the slurry in an amount of about 10% or more by weight of the slurry. The slurry is introduced into the wellbore at a pressure above the fracture pressure of the formation under conditions wherein the hydrogen fluoride source is released.

    Abstract translation: 本发明提供了一种处理由井筒渗透的含砂岩的地层的方法。 该方法通过在不沉降颗粒的情况下形成含有增粘剂和包封的氟化氢源的颗粒的载体流体的浆液来进行。 载体流体可以是酸基载体流体。 封装的氟化氢源可以用固体聚合物酸前体包封。 氟化氢源以浆料的重量计约10%或更多的量存在于浆料内。 在释放氟化氢源的条件下,将浆料以高于地层断裂压力的压力引入井筒。

    Thermoviscoelastic System Fluid and Well Treatment Method
    14.
    发明申请
    Thermoviscoelastic System Fluid and Well Treatment Method 有权
    热弹性体系流体和井处理方法

    公开(公告)号:US20070281869A1

    公开(公告)日:2007-12-06

    申请号:US11749200

    申请日:2007-05-16

    CPC classification number: C09K8/602 C09K8/68 C09K8/88 C09K2208/30

    Abstract: A thermoviscoelastic system (TVE) fluid useful in a well treatment method can include a hydrophobically-modified polymer and a viscoelastic surfactant (VES) in an aqueous medium, wherein the polymer has a lower critical solution temperature (LCST). The polymer can have water solubility for preparation below the LCST, and the TVE has a low viscosity for pumping down a well bore in communication with a subterranean formation. When the TVE is heated above the LCST, interaction between the hydrophobic groups of the polymer and the VES form a cross-linked network to increase the viscosity to transport proppant into a fracture. The thickened TVE can have a low leak-off rate, optionally including colloidal particles or other fluid loss control agent, and can be broken by contact with hydrocarbons as during flowback from the reservoir.

    Abstract translation: 可用于井处理方法的热解弹性系统(TVE)流体可以包括水性介质中的疏水改性聚合物和粘弹性表面活性剂(VES),其中聚合物具有较低的临界溶解温度(LCST)。 聚合物可以具有低于LCST的制备的水溶性,并且TVE具有低粘度,用于泵送与地下地层连通的井眼。 当TVE加热到LCST以上时,聚合物的疏水基团与VES之间的相互作用形成交联网络,以增加将支撑剂输送到裂缝中的粘度。 增稠的TVE可以具有低的泄漏率,任选地包括胶体颗粒或其它流体损失控制剂,并且可以在与储存器回流期间与烃接触而破坏。

    Method of treating sandstone formations with reduced precipitation of silica
    15.
    发明授权
    Method of treating sandstone formations with reduced precipitation of silica 有权
    用二氧化硅减少沉淀处理砂岩地层的方法

    公开(公告)号:US08802601B2

    公开(公告)日:2014-08-12

    申请号:US12046221

    申请日:2008-03-11

    CPC classification number: C09K8/74

    Abstract: A method of treating a sandstone-containing formation penetrated by a wellbore is carried out by forming a treatment fluid comprising an aqueous fluid containing a hydrogen fluoride source and an amorphous silica precipitation inhibitor. The treatment fluid is introduced into the formation through the wellbore at a pressure below the fracture pressure of the formation to facilitate dissolution of formation materials, optionally as a single stage. The amorphous silica inhibitor may be a polycarboxylate and/or polycarboxylic acid, an organosilane or a phosphonate compound. The amorphous silica inhibitor may be capable of inhibiting precipitation of amorphous silica so that the treatment fluid contains at least about 500 ppm of silicon after at least about 100 minutes subsequent to the treatment fluid being introduced into the formation.

    Abstract translation: 通过形成包含含有氟化氢源和无定形二氧化硅沉淀抑制剂的含水流体的处理流体来进行处理由井筒渗透的含砂岩地层的方法。 处理流体在低于地层断裂压力的压力下通过井筒被引入地层,以便于地层材料的溶解,任选地作为单一阶段。 无定形二氧化硅抑制剂可以是聚羧酸盐和/或多元羧酸,有机硅烷或膦酸盐化合物。 无定形二氧化硅抑制剂可以能够抑制无定形二氧化硅的沉淀,使得处理流体在处理流体被引入地层中至少约100分钟后含有至少约500ppm的硅。

    Aqueous fracturing fluid
    16.
    发明授权
    Aqueous fracturing fluid 有权
    含水压裂液

    公开(公告)号:US08143197B2

    公开(公告)日:2012-03-27

    申请号:US12176097

    申请日:2008-07-18

    CPC classification number: C09K8/62 C09K8/68 C09K2208/30

    Abstract: The invention concerns an aqueous viscoelastic fracturing fluid for use in the recovery of hydrocarbons. According to the invention, the fluid comprises a cleavable viscoelastic surfactant and a hydrophobically-modified polymer, wherein the cleavable surfactant comprises a head group and a hydrophobic tail of at least 18 carbon atoms connected through a degradable acetal, amide, ether or ester bond and wherein the concentration of the hydrophobically-modified polymer is comprised between its overlap concentration c* and its entanglement concentration ce.

    Abstract translation: 本发明涉及用于回收烃类的水性粘弹性压裂液。 根据本发明,流体包含可切割粘弹性表面活性剂和疏水改性的聚合物,其中可切割表面活性剂包含通过可降解的缩醛,酰胺,醚或酯键连接的头基和至少18个碳原子的疏水尾, 其中疏水改性聚合物的浓度在其重叠浓度c *与其缠结浓度ce之间。

    Method of Treating Sandstone Formations With Reduced Precipitation of Silica
    17.
    发明申请
    Method of Treating Sandstone Formations With Reduced Precipitation of Silica 有权
    用降低二氧化硅沉淀处理砂岩地层的方法

    公开(公告)号:US20090233819A1

    公开(公告)日:2009-09-17

    申请号:US12046221

    申请日:2008-03-11

    CPC classification number: C09K8/74

    Abstract: A method of treating a sandstone-containing formation penetrated by a wellbore is carried out by forming a treatment fluid comprising an aqueous fluid containing a hydrogen fluoride source and an amorphous silica precipitation inhibitor. The treatment fluid is introduced into the formation through the wellbore at a pressure below the fracture pressure of the formation to facilitate dissolution of formation materials, optionally as a single stage. The amorphous silica inhibitor may be a polycarboxylate and/or polycarboxylic acid, an organosilane or a phosphonate compound. The amorphous silica inhibitor may be capable of inhibiting precipitation of amorphous silica so that the treatment fluid contains at least about 500 ppm of silicon after at least about 100 minutes subsequent to the treatment fluid being introduced into the formation.

    Abstract translation: 通过形成包含含有氟化氢源和无定形二氧化硅沉淀抑制剂的含水流体的处理流体来进行处理由井筒渗透的含砂岩地层的方法。 处理流体在低于地层断裂压力的压力下通过井筒被引入地层,以便于地层材料的溶解,任选地作为单一阶段。 无定形二氧化硅抑制剂可以是聚羧酸盐和/或多元羧酸,有机硅烷或膦酸盐化合物。 无定形二氧化硅抑制剂可以能够抑制无定形二氧化硅的沉淀,使得处理流体在处理流体被引入地层中至少约100分钟后含有至少约500ppm的硅。

    Aqueous fracturing fluid
    19.
    发明申请
    Aqueous fracturing fluid 有权
    含水压裂液

    公开(公告)号:US20050107503A1

    公开(公告)日:2005-05-19

    申请号:US10497376

    申请日:2002-12-20

    CPC classification number: C09K8/62 C09K8/68 C09K2208/30

    Abstract: The invention concerns an aqueous viscoelastic fracturing fluid for use in the recovery of hydrocarbons. According to the invention, the fluid comprises a viscoelastic surfactant and a hydrophobically-modified polymer wherein the concentration of the hydrophobically-modified polymer is comprised between its overlap concentration c* and its entanglement concentration ce.

    Abstract translation: 本发明涉及用于回收烃类的水性粘弹性压裂液。 根据本发明,流体包含粘弹性表面活性剂和疏水改性聚合物,其中疏水改性聚合物的浓度在其重叠浓度c *与其缠结浓度c e之间。

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