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    • 4. 发明授权
    • Filter cake cleanup and gravel pack methods for oil based or water based drilling fluids
    • 用于油基或水基钻井液的滤饼清理和砾石包装方法
    • US06631764B2
    • 2003-10-14
    • US09778133
    • 2001-02-06
    • Mehmet ParlarColin J. Price-SmithRaymond J. TibblesShrihari KelkarMark E. BradyElizabeth W. A. Morris
    • Mehmet ParlarColin J. Price-SmithRaymond J. TibblesShrihari KelkarMark E. BradyElizabeth W. A. Morris
    • E21B4304
    • C09K8/52E21B33/14E21B34/14E21B43/04
    • A method of gravel packing a wellbore which has at least one aperture therein that provides a fluid flow path between the wellbore and an adjacent subterranean formation. At least a part of the formation adjacent to the open hole has a filter cake coated thereon that comprises a water and oil emulsion. The method of gravel packing comprises injecting into the wellbore a gravel pack composition that comprises gravel and a carrier fluid. The carrier fluid comprises an aqueous liquid having a pH that is outside the range at which the filter cake emulsion is stable. The aqueous liquid is present in an amount effective to invert the water in oil emulsion in the filter cake when the carrier fluid comes into contact with the filter cake. As a result, gravel is deposited at or adjacent to the aperture in the wellbore and some of the filter cake is removed. The remainder of the filter cake and the carrier fluid can be broken simultaneously by contact with a breaker fluid that contains at least one of a surfactant and a mutual solvent.
    • 一种砾石填充井筒的方法,其中具有至少一个孔,其在井筒和相邻的地层之间提供流体流动路径。 邻近开放孔的地层的至少一部分具有包含水和油乳液的滤饼。 砾石填充的方法包括将包括砾石和载体流体的砾石充填组合物注入井眼。 载体流体包含pH在超过滤饼乳液稳定的范围之外的水性液体。 当载体流体与滤饼接触时,水性液体以有效地反转滤饼中的油包水乳液的量存在。 结果,砾石沉积在井筒的孔口处或附近,并且去除了一些滤饼。 通过与含有表面活性剂和互溶剂中的至少一种的破碎剂流体接触,可以使滤饼和载体流体的其余部分同时破裂。