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    • 22. 发明授权
    • Filtercake removal
    • 滤饼去除
    • US07712536B2
    • 2010-05-11
    • US11947439
    • 2007-11-29
    • Laurent PirolliMehmet Parlar
    • Laurent PirolliMehmet Parlar
    • E21B21/00
    • C09K8/52C09K8/72
    • A treatment fluid and a method are disclosed for cleaning borehole filtercake using the treatment fluid, wherein the filtercake contains reservoir drilling fluid (RDF) solids. The method includes pumping the treatment fluid downhole in contact with the filtercake to be removed to establish a differential pressure between the treatment fluid and the formation adjacent the filtercake, and evenly propagating treatment of the filtercake during the differential pressure period to delay breakthrough by the treatment fluid for a period from 1 to 12 hours. The treatment fluid comprises a fluoride source providing a 1.2 to 5 molar fluoride concentration, and another acid or combination of acids to provide a pH between 1.8 and 5. The treatment fluid is balanced for a dissolving power high enough to have significant dissolution of the filtercake, but low enough for even propagation to avoid premature leak-off.
    • 公开了一种用于使用处理流体清洁钻孔滤饼的处理流体和方法,其中滤饼包含储层钻井液(RDF)固体。 该方法包括泵送与要除去的滤饼接触的处理液,以在处理流体和邻近滤饼的地层之间建立差压,并且在差压期间均匀地传播滤饼的处理以延迟通过处理的突破 流体1至12小时。 处理流体包括提供1.2至5摩尔浓度的氟化物浓度的氟化物源,以及另一种酸或酸的组合以提供1.8至5之间的pH。处理流体的平衡溶解力足够高以使滤饼显着溶解 ,但足够低以便均匀传播以避免过早的泄漏。
    • 24. 发明申请
    • Filtercake Removal
    • 滤饼去除
    • US20090139723A1
    • 2009-06-04
    • US11947439
    • 2007-11-29
    • Laurent PirolliMehmet Parlar
    • Laurent PirolliMehmet Parlar
    • E21B37/08C09K8/52
    • C09K8/52C09K8/72
    • A treatment fluid and a method are disclosed for cleaning borehole filtercake using the treatment fluid, wherein the filtercake contains reservoir drilling fluid (RDF) solids. The method includes pumping the treatment fluid downhole in contact with the filtercake to be removed to establish a differential pressure between the treatment fluid and the formation adjacent the filtercake, and evenly propagating treatment of the filtercake during the differential pressure period to delay breakthrough by the treatment fluid for a period from 1 to 12 hours. The treatment fluid comprises a fluoride source providing a 1.2 to 5 molar fluoride concentration, and another acid or combination of acids to provide a pH between 1.8 and 5. The treatment fluid is balanced for a dissolving power high enough to have significant dissolution of the filtercake, but low enough for even propagation to avoid premature leak-off.
    • 公开了一种用于使用处理流体清洁钻孔滤饼的处理流体和方法,其中滤饼包含储层钻井液(RDF)固体。 该方法包括泵送与要除去的滤饼接触的处理液,以在处理流体和邻近滤饼的地层之间建立差压,并且在差压期间均匀地传播滤饼的处理以延迟通过处理的突破 流体1至12小时。 处理流体包括提供1.2至5摩尔浓度的氟化物浓度的氟化物源,以及另一种酸或酸的组合以提供1.8至5之间的pH。处理流体的平衡溶解力足够高以使滤饼显着溶解 ,但足够低以便均匀传播以避免过早的泄漏。
    • 27. 发明授权
    • Method and composition for controlling fluid loss in high permeability
hydrocarbon bearing formations
    • 用于控制高渗透烃类地层中流体损失的方法和组成
    • US6165947A
    • 2000-12-26
    • US324291
    • 1999-06-02
    • Frank F. ChangMehmet Parlar
    • Frank F. ChangMehmet Parlar
    • C09K8/512E21B33/13C09K3/00E21B43/27
    • E21B33/13C09K8/512Y10S271/903Y10S507/903Y10S507/922Y10S507/923Y10S507/925
    • A chemical system and method to stop or minimize fluid loss during completion of wells penetrating hydrocarbon formations are provided. The inventions relates to formulating a highly stable crosslinked hydroxyethyl cellulose (HEC), control released viscosity reduction additives, and user friendly packaging. The chemical system contains a linear HEC polymer solution, a low solubility compound which slowly raises the fluid pH, a chelating agent which further increases the pH level beyond the equilibum achievable by the low solubility compound, a metal crosslinker which crosslinks HEC at elevated pH, a crosslink delaying agent which allows fluid viscosity to remain low until the fluid reaches the subterranean formation, and optionally an internal breaker. The chemical additives are packaged as an integrated pallet and transported to a field location which allows operators to conveniently mix them before pumping. There is also provided a dry granulated crosslinked polysaccharide for use as a fluid loss control agent.
    • 提供了在渗透烃地层的井完成期间停止或最小化流体损失的化学系统和方法。 本发明涉及配制高度稳定的交联羟乙基纤维素(HEC),控制释放的粘度降低添加剂和用户友好的包装。 该化学体系含有一种线性HEC聚合物溶液,一种缓慢升高流体pH值的低溶解度化合物,一种螯合剂,其进一步增加pH值超过低溶解度化合物可获得的平衡,在升高的pH下交联HEC的金属交联剂, 交联延迟剂,其允许流体粘度保持低,直到流体到达地下地层,以及任选的内部破碎剂。 化学添加剂作为一体化托盘包装,并运送到现场位置,允许操作人员在泵送之前方便地进行混合。 还提供了用作流体损失控制剂的干燥颗粒状交联多糖。
    • 30. 发明授权
    • Toe-to-heel gravel packing methods
    • 脚跟砾石包装方法
    • US08322420B2
    • 2012-12-04
    • US12569983
    • 2009-09-30
    • Mehmet ParlarRaymond TibblesBalkrishna GadiyarBryan Stamm
    • Mehmet ParlarRaymond TibblesBalkrishna GadiyarBryan Stamm
    • E21B43/04E21B21/00
    • C09K8/04C09K2208/12E21B43/04
    • Gravel packing of a wellbore penetrating a subterranean formation is carried out in a wellbore having a cased section and an uncased section that contains water-based drilling fluids. A first water-based displacement fluid that contains a shale inhibitor is introduced into the wellbore to displace the water-based drilling fluids from the uncased section of the wellbore. A second water-based displacement fluid is introduced into the wellbore to displace fluids within the cased section of the wellbore. A sand control screen assembly is run to a selected depth within the uncased section of the wellbore to facilitate a gravel packing operation. A gravel pack slurry containing gravel and a viscosified carrier fluid is introduced into the wellbore to facilitate gravel packing of the uncased section. The gravel packing operation may be carried without the use of shunt flow paths and with the use of a sand screen assembly having at least one diverter valve to divert fluid returns to facilitate prevention of pressure build up.
    • 穿透地下地层的井筒的砾石填充是在具有套管段和含有水基钻井液的未套管段的井眼中进行的。 将含有页岩抑制剂的第一种水基置换流体引入井筒中以从井筒的未被封装的部分移位水基钻井液。 第二个水基置换流体被引入到井眼中以置换井筒的套管段内的流体。 防砂筛管组件运行到井筒的未固化部分内的选定深度,以便于砾石包装操作。 将含有砾石和粘稠载体流体的砾石填充浆料引入井眼中以促进未加封段的砾石填充。 砾石填充操作可以在不使用分流流动路径的情况下进行,并且使用具有至少一个分流阀的砂筛组件来转移流体返回以便于防止压力积聚。