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    Aqueous viscoelastic fluid
    5.
    发明授权
    Aqueous viscoelastic fluid 有权
    水性粘弹性流体

    公开(公告)号：US07410934B2

    公开(公告)日：2008-08-12

    申请号：US10250416

    申请日：2002-02-13

    申请人： Trevor Hughes ,  Timothy Gareth John Jones ,  Gary John Tustin ,  Jian Zhou

    发明人： Trevor Hughes ,  Timothy Gareth John Jones ,  Gary John Tustin ,  Jian Zhou

    IPC分类号： C09K8/584 ,  C09K8/68 ,  E21B43/22 ,  E21B43/27

    CPC分类号： C09K8/68 ,  B01F17/0021 ,  B01F17/0042 ,  B01F17/0057 ,  C07C69/40 ,  C07C229/12 ,  C09K8/62 ,  C09K2208/30

    摘要： The invention concerns an aqueous viscoelastic fluid for use in the recovery of hydrocarbons. According to the invention, the aqueous viscoelastic fluid comprises a monomer, a dimer or an oligomer of a viscoelastic surfactant able to form a viscoelastic gel under downhole conditions, said surfactant comprising a hydrophobic tail and a hydrophilic head, and being of the following formulae: R—X—Y-Z where R is the hydrophobic tail of the surfactant, Z is the hydrophilic head of the surfactant, said hydrophilic head being charged, X is a stabilising group and Y chain is a linear, saturated or unsaturated, hydrocarbon chain of 1, 2 or 3 carbon atoms or a branched, saturated or unsaturated hydrocarbon chain wherein the main chain is of 1, 2 or 3 carbon atoms, possibly incorporating an aromatic ring.

    摘要翻译： 本发明涉及用于回收烃类的水性粘弹性流体。 根据本发明，水性粘弹性流体包括能够在井下条件下形成粘弹性凝胶的粘弹性表面活性剂的单体，二聚体或低聚物，所述表面活性剂包含疏水性尾巴和亲水性头部，并具有下式： RXYZ其中R是表面活性剂的疏水尾，Z是表面活性剂的亲水头，所述亲水头被加料，X是稳定基团，Y链是1,2或3的直链，饱和或不饱和的烃链 碳原子或支链，饱和或不饱和烃链，其中主链具有1,2或3个碳原子，可能并入芳环。

    Method for the determination of the ionic content of drilling mud
    6.
    发明授权
    Method for the determination of the ionic content of drilling mud 失效
    用于确定钻井泥浆的离子含量的方法

    公开(公告)号：US5140527A

    公开(公告)日：1992-08-18

    申请号：US446895

    申请日：1989-12-06

    申请人： Timothy Jones ,  Trevor Hughes ,  Philip Fletcher

    发明人： Timothy Jones ,  Trevor Hughes ,  Philip Fletcher

    IPC分类号： E21B21/08 ,  E21B49/00 ,  G01N30/02

    CPC分类号： E21B49/005 ,  E21B21/08 ,  G01N30/02

    摘要： In the rotary drilling of oil wells a drilling mud is used both to transport the cuttings up to the surface and to impose an hydrostatic pressure on the walls of the borehole. For these functions the mud must for example have an acceptable viscosity and density. It is therefore important to monitor the characteristics of the mud, and to keep them within certain limits. Only recently, however, has drilling practice recognized the importance of monitoring the mud's ionic composition. The various techniques proposed involve separation of the mud into liquid and solid portions, and analysis of these. Though they have proven useful, yet there are a number of problems. For example, the separation has not always been easy, and the available techniques often may not satisfactorily remove the fines. The invention suggests that these two problems, at least, can be overcome by the relatively simple expedient of first acidifying the mud sample, for acidification both causes the mud particles to flocculate, and so be more easily separated off, and causes the active fines to dissolve. In a preferred embodiment hydrobromic acid is employed, together with tetramethylammonium bromide (a displacement agent enabling the mud solid's Cationic Exchange Capacity to be measured), the separation is by filtration, and the analysis is by ion chromatography--and the results are fed into a computer model that then calculates the original mud components.

    Use of encapsulated chemical during fracturing
    8.
    发明授权
    Use of encapsulated chemical during fracturing 失效
    在压裂过程中使用封装的化学物质

    公开(公告)号：US08393395B2

    公开(公告)日：2013-03-12

    申请号：US12477442

    申请日：2009-06-03

    申请人： Thomas Cochet ,  Trevor Hughes ,  Slaheddine Kefi ,  Valerie Lafitte ,  Khooi Tan ,  Gary Tustin ,  Shiyi Wang

    发明人： Thomas Cochet ,  Trevor Hughes ,  Slaheddine Kefi ,  Valerie Lafitte ,  Khooi Tan ,  Gary Tustin ,  Shiyi Wang

    IPC分类号： E21B43/26 ,  E21B43/16

    CPC分类号： C09K8/706 ,  C09K8/536

    摘要： A process for hydraulic fracturing of a subterranean reservoir formation penetrated by a wellbore includes pumping a fracturing fluid or other aqueous fluid from the surface via the wellbore and into the reservoir. This fluid is an aqueous suspension of particles which each comprise an oilfield chemical distributed within an encapsulating matrix of water-insoluble carrier material. The encapsulating matrix is chosen so as to provide a delayed release of the oilfield chemical from the particles into surrounding fluid, such that oilfield chemical is liberated from the particles after they have entered the fracture. The encapsulating matrix may be a polymer which is at least partially amorphous, with a glass transition temperature below the reservoir temperature.

    摘要翻译： 由井筒穿透的地下储层地层的水力压裂过程包括从表面经由井孔泵送压裂流体或其它含水流体并进入储层。 该流体是颗粒的水性悬浮液，每个颗粒包含分布在水不溶性载体材料的包封基质内的油田化学品。 选择密封基质以便将油田化学品从颗粒延迟释放到周围的流体中，使得油田化学品在进入裂缝之后从颗粒中释放出来。 封装基质可以是至少部分无定形的聚合物，其玻璃化转变温度低于储层温度。

    USE OF ENCAPSULATED CHEMICAL DURING FRACTURING
    9.
    发明申请
    USE OF ENCAPSULATED CHEMICAL DURING FRACTURING 失效
    破裂期间使用封装化学品

    公开(公告)号：US20100307744A1

    公开(公告)日：2010-12-09

    申请号：US12477442

    申请日：2009-06-03

    申请人： Thomas Cochet ,  Trevor Hughes ,  Slaheddine Kefi ,  Valerie Lafitte ,  Khooi Tan ,  Gary Tustin ,  Shiyi Wang

    发明人： Thomas Cochet ,  Trevor Hughes ,  Slaheddine Kefi ,  Valerie Lafitte ,  Khooi Tan ,  Gary Tustin ,  Shiyi Wang

    IPC分类号： E21B43/26 ,  E21B47/00 ,  E21B43/267

    CPC分类号： C09K8/706 ,  C09K8/536

    摘要： A process for hydraulic fracturing of a subterranean reservoir formation penetrated by a wellbore includes pumping a fracturing fluid or other aqueous fluid which is an aqueous suspension of particles which each comprise an oilfield chemical distributed within an encapsulating matrix of water-insoluble carrier_material from the surface via the wellbore and into the reservoir. The encapsulating matrix is chosen so as to provide a delayed release of the oilfield chemical from the particles into surrounding fluid, such that oilfield chemical is liberated from the particles after they have entered the fracture. The encapsulating matrix may be a polymer which is at least partially amorphous, with a glass transition temperature below the reservoir temperature.

    摘要翻译： 由井筒穿透的地下储层地层的水力压裂过程包括泵送压裂液或其它含水流体，其是颗粒的水性悬浮液，每个颗粒包含分布在水不溶性载体材料的包封基质内的油田化学物质，从表面通过 井筒进入水库。 选择密封基质以便将油田化学品从颗粒延迟释放到周围的流体中，使得油田化学品在进入裂缝之后从颗粒中释放出来。 封装基质可以是至少部分无定形的聚合物，其玻璃化转变温度低于储层温度。