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    Viscoelastic surfactant acid treatment
    1.
    发明授权
    Viscoelastic surfactant acid treatment 有权
    粘弹性表面活性剂酸处理

    公开(公告)号：US08895481B2

    公开(公告)日：2014-11-25

    申请号：US12643522

    申请日：2009-12-21

    申请人： Yiyan Chen ,  Abbas Mahdi ,  Richard Marcinew ,  Matt Graham ,  Timothy L. Pope

    发明人： Yiyan Chen ,  Abbas Mahdi ,  Richard Marcinew ,  Matt Graham ,  Timothy L. Pope

    IPC分类号： C09K8/74 ,  C23F11/04 ,  C23F11/14

    CPC分类号： C23F11/04 ,  C09K8/74 ,  C09K2208/30 ,  C23F11/141

    摘要： A method of treating a subterranean formation penetrated by a wellbore involves introducing an acid treatment fluid through the wellbore into the formation. The treatment fluid is formed from a zwitterionic viscoelastic surfactant, an acid in an amount to provide the treatment fluid with an initial pH of ≦0 and a rheology enhancer. The treatment fluid has a high viscosity at the initial pH and a lower viscosity when the pH of the treatment fluid is raised to an intermediate pH of from greater than 0 to about 5.

    摘要翻译： 一种处理穿透井筒的地层的方法，包括将酸处理流体通过井筒引入地层。 处理流体由两性离子粘弹性表面活性剂形成，酸的量使得处理流体的初始pH为＆lt; nEE; 0和流变增强剂。 处理液在初始pH下具有高粘度，并且当处理流体的pH升高至大于0至约5的中间pH时，粘度较低。

    Carbon dioxide foamed fluids
    3.
    发明授权
    Carbon dioxide foamed fluids 有权
    二氧化碳发泡流体

    公开(公告)号：US07803744B2

    公开(公告)日：2010-09-28

    申请号：US11858246

    申请日：2007-09-20

    申请人： Yiyan Chen ,  Jesse Lee ,  Timothy L. Pope

    发明人： Yiyan Chen ,  Jesse Lee ,  Timothy L. Pope

    IPC分类号： C09K8/518 ,  C09K8/60

    CPC分类号： C09K8/706 ,  B01F17/0085 ,  C09K8/516 ,  C09K8/703 ,  C09K8/74 ,  C09K2208/30 ,  Y10S507/904

    摘要： An aqueous viscoelastic surfactant (VES) fluid foamed or energized with carbon dioxide, in which the VES is more compatible with the carbon dioxide, is made by the addition of one or more than one synergistic co-surfactant. The synergist co-surfactant includes quaternary amines and ethoxylated carboxylates having a hydrophobic chain shorter than the hydrophobic chain of the VES. Improved compatibility is evidenced for a given surfactant concentration either by formation and maintenance of a foam under conditions at which the foam could not otherwise have been formed or maintained, or by either higher viscosity of the foamed fluid at a given temperature or longer foam life at a given temperature or a higher temperature at which useful fluid viscosity can be generated or maintained for a useful time. The aqueous carbon dioxide foamed fluids may be used in acidizing, acid fracturing, gravel packing, diversion, and well cleanout.

    摘要翻译： 通过添加一种或多种协同辅助表面活性剂，可以制备VES与二氧化碳更相容的二氧化碳发泡或赋能的含水粘弹性表面活性剂（VES）流体。 增效剂助表面活性剂包括具有比VES的疏水链短的疏水链的季胺和乙氧基化羧酸盐。 对于给定的表面活性剂浓度，通过在泡沫不能形成或保持的条件下形成和维持泡沫，或通过在给定温度下较高粘度的发泡流体或更长的泡沫寿命来证明给定的表面活性剂浓度的改进的相容性 给定的温度或更高的温度，在该温度下可以产生或维持有用的时间。 二氧化碳水溶液发泡流体可用于酸化，酸压裂，砾石填充，分流和清洁。

    Viscoelastic surfactant rheology modification
    5.
    发明授权
    Viscoelastic surfactant rheology modification 有权
    粘弹性表面活性剂流变改性

    公开(公告)号：US07402549B2

    公开(公告)日：2008-07-22

    申请号：US11012446

    申请日：2004-12-15

    申请人： Yiyan Chen ,  Jesse C. Lee ,  Philip F. Sullivan ,  Timothy L. Pope

    发明人： Yiyan Chen ,  Jesse C. Lee ,  Philip F. Sullivan ,  Timothy L. Pope

    IPC分类号： C09K8/58 ,  C09K8/68 ,  E21B21/00

    CPC分类号： C09K8/68 ,  C09K8/602 ,  C09K2208/30

    摘要： A method for shortening the shear recovery time of cationic, zwitterionic, and amphoteric viscoelastic surfactant fluid systems by adding an effective amount of a rheology enhancer selected from partially hydrolyzed polyvinyl ester and partially hydrolyzed polyacrylates. The rheology enhancer also increases fluid viscosity and very low rheology enhancer concentration is needed. Preferred surfactants are betaines and quaternary amines. The fluids are useful in oilfield treatments, for example fracturing and gravel packing.

    摘要翻译： 通过添加有效量的选自部分水解的聚乙烯酯和部分水解的聚丙烯酸酯的流变增强剂来缩短阳离子，两性离子和两性粘弹性表面活性剂流体体系的剪切恢复时间的方法。 流变增强剂还增加了流体粘度，并且需要非常低的流变学增强剂浓度。 优选的表面活性剂是甜菜碱和季胺。 这些流体可用于油田处理，例如压裂和砾石填充。

    Carbon dioxide foamed fluids
    6.
    发明授权
    Carbon dioxide foamed fluids 有权
    二氧化碳发泡流体

    公开(公告)号：US07291651B2

    公开(公告)日：2007-11-06

    申请号：US10860855

    申请日：2004-06-04

    申请人： Yiyan Chen ,  Jesse Lee ,  Timothy L. Pope

    发明人： Yiyan Chen ,  Jesse Lee ,  Timothy L. Pope

    IPC分类号： B01F3/04 ,  B01F17/36 ,  C09K8/60 ,  E21B21/00 ,  E21B43/22

    CPC分类号： C09K8/706 ,  B01F17/0085 ,  C09K8/516 ,  C09K8/703 ,  C09K8/74 ,  C09K2208/30 ,  Y10S507/904

    摘要： An aqueous viscoelastic surfactant (VES) fluid foamed or energized with carbon dioxide, in which the VES is more compatible with the carbon dioxide, is made by the addition of one or more than one synergistic co-surfactant. The synergist co-surfactant includes quaternary amines and ethoxylated carboxylates having a hydrophobic chain shorter than the hydrophobic chain of the VES. Improved compatibility is evidenced for a given surfactant concentration either by formation and maintenance of a foam under conditions at which the foam could not otherwise have been formed or maintained, or by either higher viscosity of the foamed fluid at a given temperature or longer foam life at a given temperature or a higher temperature at which useful fluid viscosity can be generated or maintained for a useful time. The aqueous carbon dioxide foamed fluids may be used in acidizing, acid fracturing, gravel packing, diversion, and well cleanout.

    摘要翻译： 通过添加一种或多种协同辅助表面活性剂，可以制备VES与二氧化碳更相容的二氧化碳发泡或赋能的含水粘弹性表面活性剂（VES）流体。 增效剂助表面活性剂包括具有比VES的疏水链短的疏水链的季胺和乙氧基化羧酸盐。 对于给定的表面活性剂浓度，通过在泡沫不能形成或保持的条件下形成和维持泡沫，或通过在给定温度下较高粘度的发泡流体或更长的泡沫寿命来证明给定的表面活性剂浓度的改进的相容性 给定的温度或更高的温度，在该温度下可以产生或维持有用的时间。 二氧化碳水溶液发泡流体可用于酸化，酸压裂，砾石填充，分流和清洁。