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    • 52. 发明申请
    • Methods and Compositions for Diverting Acid Fluids in Wellbores
    • 在井筒中转移酸性液体的方法和组合
    • US20070151726A1
    • 2007-07-05
    • US11689203
    • 2007-03-21
    • James CrewsTianping Huang
    • James CrewsTianping Huang
    • E21B43/22E21B43/27
    • C09K8/72C09K8/602C09K8/68C09K8/74C09K2208/26C09K2208/30
    • Viscoelastic surfactant (VES) gelled aqueous fluids containing a VES, an internal breaker, and optionally a viscosity enhancer are useful as diverting fluid for directing placement of an acid into a subterranean formation, where the acid is injected subsequent to introducing the VES gelled fluid. These VES-based diverting fluids have faster and more complete clean-up than polymer-based diverting fluids. The viscosity enhancers may include pyroelectric particles and/or piezoelectric particles. The VES gelled fluid may optionally contain a fluid loss agent which increases the viscosity of the fluid and/or facilitates development of an external viscous VES fluid layer (e.g. a pseudo-filter cake) on the formation face. The VES gelled fluid may also optionally contain an agent that stabilizes the viscosity of the fluid, for instance at high temperatures, such as MgO, Mg(OH)2, CaO, Ca(OH)2, NaOH, and the like.
    • 粘弹性表面活性剂(VES)含有VES,内部破碎剂和任选的粘度增强剂的凝胶水性流体可用作转向流体,用于将酸引入地下地层中,其中在引入VES凝胶流体之后注入酸。 这些基于VES的转向流体比基于聚合物的转移流体更快,更完整地清理。 粘度增强剂可以包括热电颗粒和/或压电颗粒。 VES凝胶化流体可以任选地含有流体损失剂,其增加流体的粘度和/或促进形成面上的外部粘性VES流体层(例如伪滤饼)的显影。 VES凝胶状流体还可任选地含有稳定流体粘度的试剂,例如在高温下,例如MgO,Mg(OH)2,CaO,Ca(OH) 2N,NaOH等。
    • 53. 发明授权
    • Composition and method for diversion agents for acid stimulation of subterranean formations
    • 用于地下地层酸刺激的转移剂的组成和方法
    • US06994166B2
    • 2006-02-07
    • US10602230
    • 2003-06-24
    • Tianping HuangPaul M. McElfresh
    • Tianping HuangPaul M. McElfresh
    • E21B43/27E21B33/138
    • C09K8/72Y10S507/933
    • It has been discovered that solid, particulate dicarboxylic acids are useful as diverting agents in methods for acidizing subterranean formations to improve the uniformity of the acid treatments (acid displacement) by diverting acid to intervals of relatively less permeability. Particularly suitable solid, particulate dicarboxylic acids include, but are not necessarily limited to, those insoluble in both aqueous and hydrocarbon liquids, but which are soluble in mutual solvents or alcohol blends. These acids may have melting points of from about 180 to about 300° F. (about 82 to about 149° C.), formula molecular weights of from 146 to 400, and mesh sizes of from about 20 mesh to about 400 mesh (about 841 to about 38 microns). Particular dicarboxylic acids that fit this description include, but are not necessarily limited to, dodecanedioic acid, undecanedioic acid, decanedioic acid, azelaic acid, suberic acid, and mixtures thereof.
    • 已经发现,固体颗粒二羧酸在用于酸化地下地层的方法中可用作转向剂,以通过将酸转移到相对较小渗透性的间隔来改善酸处理的均匀性(酸置换)。 特别合适的固体颗粒二羧酸包括但不一定限于不溶于水和烃液体但可溶于相互溶剂或醇共混物的那些。 这些酸可以具有约180至约300°F(约82至约149℃)的熔点,146至400的分子式分子量和约20目至约400目(约 841至约38微米)。 符合该描述的特定二羧酸包括但不一定限于十二烷二酸,十一烷二酸,癸二酸,壬二酸,辛二酸及其混合物。
    • 57. 发明授权
    • Lost circulation control fluids for naturally fractured carbonate formations
    • 天然裂缝碳酸盐岩层的循环控制流体失控
    • US08544565B2
    • 2013-10-01
    • US12907529
    • 2010-10-19
    • Tianping HuangJames B. CrewsDavid E. Clark
    • Tianping HuangJames B. CrewsDavid E. Clark
    • E21B21/00E21B33/138C09K8/06
    • C09K8/508C09K8/12C09K2208/30
    • Compositions including relatively low reactivity acids and having a pH of from about 2 to about 5, mixed with viscoelastic surfactants (VESs) and internal breakers may serve as fluids, in a non-limiting embodiment as drilling fluids, to open underground hydrocarbon reservoirs with carbonate contents of 10 wt % or above. The fluids initially have low viscosities. After the fluid flows out of the drill bit, the acids react with carbonates in the formation thereby increasing the pH of the fluids causing the VES to gel the fluid at the bottom of the hole and within the formation rock. Even when the subterranean formation contains naturally-occurring fractures, the viscosified fluid will reduce fluid loss into the formation. After drilling through the targeted formation, internal breakers in the viscosified fluids will break down the fluids to permit their removal, and production of the well with very little or no near well bore damage.
    • 与粘弹性表面活性剂(VES)和内部破碎剂混合的包含相对较低反应性酸和约2至约5的pH的组合物在非限制性实施方案中可用作钻井液,用碳酸盐开放地下储层 含量10重量%以上。 液体最初具有低粘度。 在流体从钻头流出之后,酸与地层中的碳酸盐反应,从而增加流体的pH,导致VES凝结孔底部和地层岩内的流体。 即使当地下地层含有天然裂缝时,粘稠流体也会减少流体进入地层的流失。 在通过目标地层钻井后,粘稠流体中的内部破碎物将分解流体,以允许其移除,并且井的产生很少或没有接近井眼损坏。
    • 58. 发明授权
    • Increasing the viscosity of viscoelastic fluids
    • 增加粘弹性流体的粘度
    • US08430165B2
    • 2013-04-30
    • US12783190
    • 2010-05-19
    • Tianping HuangJames B. CrewsGaurav Agrawal
    • Tianping HuangJames B. CrewsGaurav Agrawal
    • E21B43/26
    • C09K8/68C09K8/06C09K8/40C09K8/506C09K8/52C09K8/602C09K2208/30
    • In hydrocarbon recovery applications, viscoelastic surfactant (VES) gelled fluids may be preheated to a temperature that will increase viscosity of the VES gelled fluid. The preheated VES gelled fluid retains at least a portion of its preheated viscosity when cooled such as by introduction into a low temperature condition. In an embodiment, the VES gelled fluid may be a drilling fluid, completion fluid, or fracturing fluid, and the low temperature condition may be an offshore operation, an operation in a locality having a cold climate, and/or a shallow oil, gas, or both land-based operation where the formation temperature is 120° F. or less. The surfactant in the VES gelled fluid may be one or more of an amine, amine salt, quaternary ammonium salt, betaine, amidoamine oxide, amine oxide, and combinations thereof.
    • 在烃回收应用中,粘弹性表面活性剂(VES)胶凝液体可以预热到将增加VES凝胶流体粘度的温度。 预热的VES凝胶流体在冷却时保持其预热粘度的至少一部分,例如通过引入低温条件。 在一个实施方案中,VES凝胶化流体可以是钻井液,完井流体或压裂流体,并且低温条件可以是海上操作,具有寒冷气候的区域中的操作和/或浅油,气体 或地层温度为120°F以下的陆基作业。 VES凝胶化流体中的表面活性剂可以是胺,胺盐,季铵盐,甜菜碱,酰氨基氧化胺,氧化胺及其组合中的一种或多种。