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    • 5. 发明授权
    • Method of fracturing multiple zones within a well using propellant pre-fracturing
    • 使用推进剂预压裂压裂井内多个区域的方法
    • US09027641B2
    • 2015-05-12
    • US13198962
    • 2011-08-05
    • Olga Petrovna AlekseenkoAlexander F ZazovskyDmitry Ivanovich PotapenkoChristopher N Fredd
    • Olga Petrovna AlekseenkoAlexander F ZazovskyDmitry Ivanovich PotapenkoChristopher N Fredd
    • E21B43/26E21B43/14
    • E21B43/26E21B33/124E21B43/116E21B43/14E21B43/267
    • A method of fracturing multiple zones within a wellbore formed in a subterranean formation is carried out by forming flow-through passages in two or more zones within the wellbore that are spaced apart from each other along the wellbore. The flow-through passages are arranged into clusters, where the directions of all flow-through passages, which belong to the same cluster, are aligned within a single plane (cluster plane). At least one cluster of flow-through passages is formed in each zone. The clusters within each zone have characteristics different from those of other zones provided by orienting the cluster planes at different angles relative to principal in-situ stresses and by placing them into different locations along the wellbore in each of the two or more zones. A propellant pre-fracturing treatment is then performed in the two or more zones to create initial fractures (pre-fractures) in each of the two or more zones. The fracturing fluid in the fracturing treatment is provided at a pressure that is above the pre-fracture propagation pressure of one of the two or more zones to facilitate fracturing of said one of the two or more zones. The pressure of the fracturing fluid is below the pre-fracture propagation pressure of any other non-treated zones of the two or more zones. The isolating of the treated zone is then performed. The fracturing process is then repeated for at least one or more non-treated zones of the two or more zones.
    • 通过在井筒内沿着井眼彼此间隔开的两个或更多个区域中形成流通通道来进行在地下地层中形成的井眼内压裂多个区域的方法。 流通通道被布置成簇,其中属于相同簇的所有流通通道的方向在单个平面(簇平面)内对准。 在每个区域中形成至少一组流通通道。 每个区域内的簇具有不同于通过相对于主要原位应力以不同角度定向簇平面而提供的其它区域的特征,并且通过将它们放置在沿两个或更多个区域中的每个区域中的井筒的不同位置。 然后在两个或更多个区域中进行推进剂预压裂处理,以在两个或更多个区域的每一个区域中产生初始裂缝(预裂缝)。 在压裂处理中的压裂液的压力高于两个或更多个区域中的一个区域的裂缝前传播压力,以促进两个或更多个区域中的所述一个区域的压裂。 压裂液的压力低于两个或多个区域的任何其他未处理区域的裂缝前传播压力。 然后进行处理区域的分离。 然后对于两个或更多个区域的至少一个或多个未处理区域重复断裂过程。