Method for improving complexity index of deep shale gas fracture

Method for improving complexity index of deep shale gas fracture

  • CN 106,567,702 A
  • Filed: 10/10/2015
  • Published: 04/19/2017
  • Est. Priority Date: 10/10/2015
  • Status: Active Application
First Claim
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1. a kind of method for improving deep layer shale gas cracks complexity index method, it includes N section construction operations, oftenSection construction operation includes:

  • Step I, lower bridging plug and perforation:

    Enter bridging plug and perforating gun under precalculated position, bridge plug seat is honored as a queen and is given up,Then perforation;

    Step II, low-kappa number:

    Acid solution II is added to be processed into pit shaft, to clean the dirt of near-wellbore regionContaminate and reduce the crack tortuosity frictional resistance of near-wellbore region;

    Step III, the work that makes children major fracture:

    Slippery water III is injected into pit shaft and opens artificial major fracture;

    Step IV, links up intrinsic fracture:

    Inject acid solution IV into pit shaft to form the day with artificial major fracture UNICOMRight fissure channel;

    Step V, extends intrinsic fracture:

    Slippery water V is injected into pit shaft to extend intrinsic fracture, and extends dayThe length and width that so branch in crack stitches;

    Step VI, extends artificial major fracture:

    Glue VI is injected into pit shaft and extends artificial major fracture;

    Step VII, the operation of repeat step IV-VI;

    Step VIII, extends artificial major fracture:

    The length that glue VIII extends artificial major fracture is injected into pit shaft;

    Wherein, N is positive integer.

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