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公开(公告)号：US06543276B2
公开(公告)日：2003-04-08
申请号：US09861362
申请日：2001-05-18
IPC分类号： G01N1504
CPC分类号： G01N15/08
摘要： A method and apparatus for determining the effectiveness and reaction time of a breaker fluid in breaking a filter cake on the wall of a wellbore penetrating a subterranean formation is disclosed. The method comprises employing an apparatus, such as for example the apparatus of the invention with a filter medium and the capability of applying differential pressure or dynamic conditions to form a filter cake on the filter medium with drilling mud. Breaker fluid is then substituted for the drilling mud, preferably without damage to the filter cake. The quantity of breaker fluid passing across the filter medium under static conditions is monitored over time. An increase in the rate of fluid passing across or through the medium indicates break-up of the filter cake.
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2.发明申请公开(公告)号：US20050034868A1
公开(公告)日：2005-02-17
申请号：US10752752
申请日：2004-01-07
申请人： Keith Frost , Gary Funkhouser , Bessie Nita Citrowske , Brad Todd
发明人： Keith Frost , Gary Funkhouser , Bessie Nita Citrowske , Brad Todd
CPC分类号： C09K8/805 , C09K8/52 , Y10S507/906 , Y10S507/924 , Y10T428/2991 , Y10T428/2993 , Y10T428/2996
摘要： The present invention relates to methods and compositions for treating subterranean formations, and more specifically, to improved methods and compositions for generating acids for use downhole, for example, to at least partially degrade the acid-soluble portions of filter cakes deposited in subterranean formations. In one embodiment, the present invention provides a method of degrading an acid-soluble portion of a filter cake comprising contacting the acid-soluble portion of the filter cake with an acid generated from an orthoester.
摘要翻译： 本发明涉及用于处理地下地层的方法和组合物，更具体地，涉及用于产生在井下使用的酸的改进的方法和组合物，例如至少部分地降解沉积在地下地层中的滤饼的酸溶性部分。 在一个实施方案中，本发明提供降解滤饼的酸溶性部分的方法，包括使滤饼的酸溶性部分与由原酸酯产生的酸接触。
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3.发明申请Orthoester compositions and methods for reducing the viscosified treatment fluids 有权用于降低粘稠处理液的异构体组合物和方法公开(公告)号：US20050045328A1
公开(公告)日：2005-03-03
申请号：US10785300
申请日：2004-02-24
申请人： Keith Frost , Gary Unkhouser , Brad Todd
发明人： Keith Frost , Gary Unkhouser , Brad Todd
CPC分类号： C09K8/02 , C09K8/62 , C09K8/68 , C09K8/72 , C09K2208/26 , Y10S507/906 , Y10S507/921 , Y10S507/924
摘要： In one embodiment, the present invention provides a method of reducing the viscosity of a viscosified treatment fluid comprising contacting the viscosified treatment fluid with an acid generated from an orthoester composition that comprises an orthoester. In another embodiment, the present invention provides a method of reducing the pH of a viscosified treatment fluid comprising providing an orthoester composition that comprises an orthoester; contacting the viscosified treatment fluid with the orthoester composition; allowing the orthoester to generate a generated acid; and allowing the generated acid to at least partially reduce the pH of the viscosified treatment fluid. Embodiments of fracturing and gravel packing methods also are disclosed.
摘要翻译： 在一个实施方案中，本发明提供了降低稠化处理流体的粘度的方法，包括使稠化处理流体与由原酸酯组成的原酸酯组合物产生的酸接触。 在另一个实施方案中，本发明提供了降低稠化处理流体的pH的方法，包括提供包含原酸酯的原酸酯组合物; 使稠化处理流体与原酸酯组合物接触; 允许原酸酯产生产生的酸; 并且使所产生的酸至少部分地降低粘稠处理流体的pH。 还公开了压裂和砾石包装方法的实施例。
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