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    Fluid having recyclable viscosity
    5.
    发明申请
    Fluid having recyclable viscosity 有权
    流体具有可回收粘度

    公开(公告)号：US20060063681A1

    公开(公告)日：2006-03-23

    申请号：US10943577

    申请日：2004-09-17

    申请人： Yenny Christanti ,  Diankui Fu ,  Jian Zhou

    发明人： Yenny Christanti ,  Diankui Fu ,  Jian Zhou

    IPC分类号： E21B37/00 ,  E21B43/00

    CPC分类号： C09K8/52 ,  C09K2208/30

    摘要： Compositions are given that have high viscosities at one pH range and low viscosities at another pH range. Methods are given for using such compositions in oilfield treatments. In particular CT wellbore cleanout compositions and methods are given in which a viscous fluid is injected into a wellbore; the fluid entrains particles and carries them to the surface; the viscosity of the fluid is reduced by reducing or increasing the pH; the particles settle from the fluid; the viscosity of the fluid is increased by increasing or reducing the pH; and the fluid is re-injected into the wellbore. Suitable surfactants are anionic surfactants, or mixtures of surfactants containing anionic surfactants, that aggregate into three-dimensional structures that substantially increase the viscosity at high pH but not at low pH. Other suitable surfactants are cationic surfactants with co-surfactants that aggregate below a certain pH but not above.

    摘要翻译： 给出了在一个pH范围内具有高粘度并在另一pH范围内具有低粘度的组合物。 给出了在油田处理中使用这些组合物的方法。 特别是给出了将其中的粘性流体注入到井眼中的CT井眼清洁组合物和方法; 流体夹带颗粒并将其携带到表面; 通过降低或增加pH降低流体的粘度; 颗粒从液体中沉淀出来; 通过增加或降低pH来增加流体的粘度; 并将流体再次注入井眼。 合适的表面活性剂是阴离子表面活性剂或含有阴离子表面活性剂的表面活性剂的混合物，其聚集成三维结构，其在高pH但不在低pH下显着增加粘度。 其它合适的表面活性剂是具有共表面活性剂的阳离子表面活性剂，其聚集低于一定pH但不高于。

    Fluid having recyclable viscosity
    6.
    发明授权
    Fluid having recyclable viscosity 有权
    流体具有可回收粘度

    公开(公告)号：US07290615B2

    公开(公告)日：2007-11-06

    申请号：US10943577

    申请日：2004-09-17

    申请人： Yenny Christanti ,  Diankui Fu ,  Jian Zhou

    发明人： Yenny Christanti ,  Diankui Fu ,  Jian Zhou

    IPC分类号： E21B37/00

    CPC分类号： C09K8/52 ,  C09K2208/30

    摘要： Compositions are given that have high viscosities at one pH range and low viscosities at another pH range. Methods are given for using such compositions in oilfield treatments. In particular CT wellbore cleanout compositions and methods are given in which a viscous fluid is injected into a wellbore; the fluid entrains particles and carries them to the surface; the viscosity of the fluid is reduced by reducing or increasing the pH; the particles settle from the fluid; the viscosity of the fluid is increased by increasing or reducing the pH; and the fluid is re-injected into the wellbore. Suitable surfactants are anionic surfactants, or mixtures of surfactants containing anionic surfactants, that aggregate into three-dimensional structures that substantially increase the viscosity at high pH but not at low pH. Other suitable surfactants are cationic surfactants with co-surfactants that aggregate below a certain pH but not above.

    摘要翻译： 给出了在一个pH范围内具有高粘度并在另一pH范围内具有低粘度的组合物。 给出了在油田处理中使用这些组合物的方法。 特别是给出了将其中的粘性流体注入到井眼中的CT井眼清洁组合物和方法; 流体夹带颗粒并将其携带到表面; 通过降低或增加pH降低流体的粘度; 颗粒从液体中沉淀出来; 通过增加或降低pH来增加流体的粘度; 并将流体再次注入井眼。 合适的表面活性剂是阴离子表面活性剂或含有阴离子表面活性剂的表面活性剂的混合物，其聚集成三维结构，其在高pH但不在低pH下显着增加粘度。 其它合适的表面活性剂是具有共表面活性剂的阳离子表面活性剂，其聚集低于一定pH但不高于。

    Method for single-stage treatment of siliceous subterranean formations
    8.
    发明授权
    Method for single-stage treatment of siliceous subterranean formations 有权
    硅质地层单层处理方法

    公开(公告)号：US08312929B2

    公开(公告)日：2012-11-20

    申请号：US12019394

    申请日：2008-01-24

    申请人： Wayne W. Frenier ,  Diankui Fu ,  Stephen Nigel Davies ,  Murtaza Ziauddin ,  Zhijun Xiao ,  Bruno Lecerf ,  Helene Bulte

    发明人： Wayne W. Frenier ,  Diankui Fu ,  Stephen Nigel Davies ,  Murtaza Ziauddin ,  Zhijun Xiao ,  Bruno Lecerf ,  Helene Bulte

    IPC分类号： E21B43/28

    CPC分类号： C09K8/74

    摘要： In a method of treating a sandstone-containing formation penetrated by a wellbore, a treatment fluid comprising an aqueous fluid containing a Bronsted acid, a hydrogen fluoride source and an organic acid or salt thereof that is substantially soluble in the aqueous fluid is formed. The treatment fluid contains less than about 2% of fluoride (F−) by weight of the fluid and from 2% or less of sodium (Na+) by weight of the fluid. The treatment fluid is introduced into the formation through the wellbore as a single-stage without introducing an acid-containing fluid preflush into the formation prior to introducing the treatment fluid.

    摘要翻译： 在处理由井眼渗透的含砂岩地层的方法中，形成包含基本上可溶于水性流体的含有布朗斯台德酸，氟化氢源及其有机酸或其盐的含水流体的处理流体。 处理液含有少于约2％的流体重量的氟化物（F-），和流体重量的2％或更少的钠（Na +）。 在引入处理流体之前，将处理流体作为单阶段通过井筒引入地层，而不将酸含量的流体预吹入地层中。

    Viscoelastic acid
    10.
    发明授权
    Viscoelastic acid 有权
    粘弹性酸

    公开(公告)号：US07341107B2

    公开(公告)日：2008-03-11

    申请号：US11006004

    申请日：2004-12-07

    申请人： Diankui Fu ,  Marieliz Garcia-Lopez De Victoria

    发明人： Diankui Fu ,  Marieliz Garcia-Lopez De Victoria

    IPC分类号： C09K8/68 ,  C09K8/74

    CPC分类号： C09K8/74 ,  C09K2208/30

    摘要： An acidic viscoelastic surfactant fluid composition is formulated with an acid, for example hydrochloric acid, a cationic surfactant, for example a quaternary amine, and a break-enabling salt, for example NH4Cl. The fluid composition has low viscosity as formulated, undergoes an increase in viscosity as the acid is consumed when it reacts with an acid-reactive material, and returns to approximately the initial viscosity as the last of the acid is consumed. The fluid composition is used as a diverting fluid or as the main treatment fluid in oilfield treatments such as matrix acidizing and acid fracturing.

    摘要翻译： 酸性粘弹性表面活性剂流体组合物与酸（例如盐酸），阳离子表面活性剂（例如季胺）和能使裂解的盐例如NH 4 Cl配制。 流体组合物具有如下配制的低粘度，当酸与酸反应性材料反应时消耗酸，粘度增加，并随着酸的最后消耗而恢复到大致的初始粘度。 流体组合物用作转移流体或作为油田处理中的主要处理流体，例如基质酸化和酸压裂。