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    Methods for Controlling Lost Circulation in A Subterranean Well and Materials There for
    3.
    发明申请
    Methods for Controlling Lost Circulation in A Subterranean Well and Materials There for 有权
    控制地下井及其材料中失水循环的方法

    公开(公告)号：US20120322695A1

    公开(公告)日：2012-12-20

    申请号：US13511144

    申请日：2010-12-03

    申请人： Slaheddine Kefi ,  Jesse C. Lee ,  Chrystel Brunet-Cambus ,  Nikhil Shindgikar

    发明人： Slaheddine Kefi ,  Jesse C. Lee ,  Chrystel Brunet-Cambus ,  Nikhil Shindgikar

    IPC分类号： C09K8/32

    CPC分类号： C09K8/32 ,  C09K8/502 ,  C09K8/516 ,  C09K2208/08 ,  E21B21/003

    摘要： Method for controlling lost circulation in a subterranean well using oil-dispersible lost-circulation materials which comprise fibers that are coated (or sized) with a lipophilic coupling agent, a lipophilic film-forming polymer or both. The fibers are preferably between about 6 mm and about 25 mm long, and between about 10 μm and about 200 μm in diameter. The fibers may be added to carrier fluids comprising oil-base fluids, synthetic-base fluids, invert-emulsion-base fluids and combinations thereof. The preferred fiber concentration in the carrier fluid is between about 0.55 g/L and about 28.5 g/L. The carrier fluid may be a drilling fluid, a spacer fluid or a lost-circulation pill.

    摘要翻译： 使用包含用亲脂性偶联剂，亲脂性成膜聚合物或两者涂覆（或尺寸）的纤维的油分散性缺失循环材料来控制地下井中的流失的方法。 纤维的长度优选为约6mm至约25mm，直径为约10μm至约200μm。 纤维可以添加到包含油基流体，合成基础流体，反相乳液基流体及其组合的载体流体中。 载体流体中优选的纤维浓度在约0.55g / L至约28.5g / L之间。 载体流体可以是钻井液，间隔液或失循环丸。

    Degradable additive for viscoelastic surfactant based fluid systems
    7.
    发明授权
    Degradable additive for viscoelastic surfactant based fluid systems 有权
    用于粘弹性表面活性剂的流体系统的可降解添加剂

    公开(公告)号：US07219731B2

    公开(公告)日：2007-05-22

    申请号：US11159023

    申请日：2005-06-22

    申请人： Philip F. Sullivan ,  J Ernest Brown ,  Jesse C. Lee ,  Golchehreh Salamat

    发明人： Philip F. Sullivan ,  J Ernest Brown ,  Jesse C. Lee ,  Golchehreh Salamat

    IPC分类号： E21B43/04 ,  E21B43/22 ,  E21B43/267

    CPC分类号： C09K8/68 ,  C09K8/506 ,  C09K8/62 ,  C09K8/70 ,  C09K8/72 ,  C09K8/74 ,  C09K2208/26 ,  C09K2208/30 ,  Y10S507/902

    摘要： A method is given for treating a subterranean formation penetrated by a wellbore with a viscosified fluid. The fluid contains a solid hydrolysable polyacid that upon dissolution and hydrolysis releases an acid that is a breaker for the viscosifying system. Suitable solid hydrolysable polyacids include polylactic acid and polyglycolic acid. The fluid also contains a pH control agent, present in an amount sufficient to neutralize any acid present in the solid hydrolysable polyacid before the injection and to neutralize any acid generated by the solid hydrolysable polyacid during the injection, so that the acid breaker is not available to break the fluid during the injection. In one embodiment the viscosifier is a viscoelastic surfactant fluid system and the solid hydrolysable polyacid is of a size selected to be a fluid loss additive, for example in fracturing or gravel packing. In another embodiment, the solid hydrolysable polyacid is used in particles sufficiently small that they enter the pores of the formation. In either case, the viscosifier is broken after the solid releases more acid than can be neutralized by the pH control agent.

    摘要翻译： 给出了用增稠液体处理井眼渗透的地层的方法。 流体包含固体可水解的多酸，其在溶解和水解时释放酸，该酸是用于增粘体系的断裂剂。 合适的固体可水解的多元酸包括聚乳酸和聚乙醇酸。 流体还含有pH控制剂，其量足以中和注射前固体可水解的多元酸中存在的任何酸，并且在注射期间中和由固体可水解的多元酸产生的任何酸，使得酸破乳剂不可用 在注射期间打破流体。 在一个实施方案中，增粘剂是粘弹性表面活性剂流体系统，并且固体可水解的多元酸的尺寸被选择为流体损失添加剂，例如在压裂或砾石包装中。 在另一个实施方案中，固体可水解的多元酸以足够小的颗粒使用，使得它们进入地层的孔。 在任一种情况下，在固体释放比可以被pH控制剂中和的酸更多之后，粘稠剂被破坏。

    Viscoelastic surfactant fluid systems comprising an aromatic sulfonate and methods of using same
    8.
    发明授权
    Viscoelastic surfactant fluid systems comprising an aromatic sulfonate and methods of using same 有权
    包含芳族磺酸盐的粘弹性表面活性剂流体体系及其使用方法

    公开(公告)号：US07507693B2

    公开(公告)日：2009-03-24

    申请号：US11608085

    申请日：2006-12-07

    申请人： Yiyan Chen ,  Jesse C. Lee ,  Eric Hanson

    发明人： Yiyan Chen ,  Jesse C. Lee ,  Eric Hanson

    IPC分类号： C09K8/60 ,  C09K8/62 ,  E21B43/26

    CPC分类号： C09K8/68 ,  C09K8/602 ,  C09K8/88 ,  C09K2208/30

    摘要： Methods of improving shear recovery time of viscoelastic surfactant fluid systems are described, one method involving providing a viscoelastic surfactant fluid system comprising a major portion of a surfactant and a rheology enhancer in a concentration sufficient to shorten shear recovery time of the fluid system compared to shear recovery time of the fluid system absent the rheology enhancer, the rheology enhancer selected from aromatic sulfonates having a molecular weight of at least 500; and injecting the fluid system down a well. The rheology enhancer may be a lignosulfonate derived from wood pulping. Viscoelastic surfactant systems including the rheology enhancer are also described.

    摘要翻译： 描述了提高粘弹性表面活性剂流体体系的剪切恢复时间的方法，一种方法包括提供包含主要部分表面活性剂和流变增强剂的粘弹性表面活性剂流体体系，其浓度足以缩短与剪切相比的流体系统的剪切恢复时间 不含流变增强剂的流体体系的回收时间，流变增强剂选自分子量至少为500的芳族磺酸盐; 并将流体系统向下注入井中。 流变增强剂可以是衍生自木材制浆的木质素磺酸盐。 还描述了包括流变增强剂的粘弹性表面活性剂体系。

    Viscoelastic surfactant rheology modification
    9.
    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。

    Oxidative Internal Breaker for Viscoelastic Surfactant Fluids
    10.
    发明申请
    Oxidative Internal Breaker for Viscoelastic Surfactant Fluids 有权
    用于粘弹性表面活性剂流体的氧化内部断路器

    公开(公告)号：US20080070813A1

    公开(公告)日：2008-03-20

    申请号：US11532565

    申请日：2006-09-18

    申请人： Lijun Lin ,  Yiyan Chen ,  Philip F. Sullivan ,  Belgin Baser ,  Carlos Abad ,  Jesse C. Lee

    发明人： Lijun Lin ,  Yiyan Chen ,  Philip F. Sullivan ,  Belgin Baser ,  Carlos Abad ,  Jesse C. Lee

    IPC分类号： C09K8/00 ,  E21B43/00

    CPC分类号： C09K8/68 ,  C09K8/602 ,  C09K2208/26

    摘要： Compositions and methods are given for delayed breaking of viscoelastic surfactant gels inside formation pores, particularly for use in hydraulic fracturing. Breaking inside formation pores is accomplished without mechanical intervention or use of a second fluid. Oxidizing agents such as air, oxygen, persulfates, bromates, peroxides, and others are used. The break may be accelerated, for example with a free radical propagating species, or retarded, for example with an oxygen scavenger. In certain brines, for example bromide brines, certain zwitterionic viscoelastic fluid systems that can decarboxylate and that require an anion-containing co-surfactant undergo delayed degradation if oxygen is present, for example from fluid preparation or in a foam.

    摘要翻译： 给出组合物和方法用于延迟破裂地层孔隙内的粘弹性表面活性剂凝胶，特别是用于水力压裂。 破碎内部形成孔隙是在没有机械干预或使用第二流体的情况下完成的。 使用氧化剂如空气，氧气，过硫酸盐，溴酸盐，过氧化物等。 可以加速断裂，例如用自由基传播物质或延迟的，例如用氧清除剂。 在某些盐水中，例如溴化物盐水，可以脱羧并且需要含阴离子的辅助表面活性剂的某些两性离子粘弹性流体体系如果存在氧，例如从流体制备或泡沫中经历延迟降解。