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    STIMULATION OF WELLS IN NANO-DARCY SHALE FORMATIONS
    2.
    发明公开
    STIMULATION OF WELLS IN NANO-DARCY SHALE FORMATIONS 审中-公开
    NANO-DARCY-SCHIEFERFORMATIONEN的STIMULIERUNG VON BOHRUNGEN

    公开(公告)号：EP3132112A1

    公开(公告)日：2017-02-22

    申请号：EP15780712.4

    申请日：2015-04-10

    申请人： Flex-chem Holding Company LLC

    发明人： CONWAY, Andrew Bryce

    IPC分类号： E21B43/22 ,  E21B43/28 ,  C09K8/60

    CPC分类号： C09K8/605 ,  C09K8/528 ,  C09K8/602 ,  C09K8/62 ,  C09K8/72 ,  C09K2208/32 ,  E21B43/267

    摘要： Formulations and methods for stimulating the production from wells in nano-darcy shale formations. In one embodiment, the method includes injecting a treatment mixture containing a metal complexing agent into a nano-darcy shale formation adjacent to a well at a pressure below the fracture pressure of the formation. A sufficient contact time is allowed and then the treatment mixture is pumped from the subsurface. This has been shown to stimulate well production in shale formations. Without being held to a particular theory it appears that the metal complexing agent is binding with naturally occurring metals in the shale formation, and particularly divalent metal ions, which are then extracted with the spent fluid. This removal of naturally occurring metals may be increasing the permeability of the formation in the contact region adjacent to the well, thereby causing the observed increased production.

    摘要翻译： 本公开描述了用于刺激纳米碧玺页岩地层中的井的生产的制剂和方法。 在一个实施方案中，该方法包括在低于地层断裂压力的压力下将含有金属络合剂的处理混合物注入邻近井的纳米乳香页岩地层。 允许充分的接触时间，然后将处理混合物从地下泵送。 这已被证明可以刺激页岩地层的良好生产。 不受特定理论的束缚，似乎金属络合剂与页岩层中天然存在的金属结合，特别是二价金属离子，然后用废流体萃取。 天然存在的金属的这种去除可以增加邻近井的接触区域中地层的渗透性，从而引起观察到的增加的生产。