Deep shale gas stepless variable-parameter slope type injection fracturing method
A variable parameter, shale gas technology, applied in the field of oil drilling, can solve the problems of poor fracturing effect and rapid production decline in deep shale gas
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[0080] A certain well has a vertical depth of 3789m, a measured depth of 4962m, and a horizontal section length of 1300m. Carry out optimal design by the method provided by the present invention, step and result are as follows:
[0081] (1) According to the evaluation of key shale reservoir parameters, the well develops high-quality shale with good static indicators, medium-to-high brittleness, and high-angle natural fractures in some intervals.
[0082] (2) Determine the double-sweet spot area (comprehensive sweet spot>0.5) of geological sweet spot and engineering sweet spot as the location of perforation cluster.
[0083] (3) ECLIPSE software is used for numerical simulation, and the orthogonal scheme is used for simulation scheme design. The fracturing parameters for obtaining the optimal long-term production after fracturing are as follows: 18 stages of fracturing, optimal fracture spacing of 16-28m, and half-length of fractures of 260- 300m, the diversion capacity is 30-...
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