High-frequency variable displacement volume fracturing method for atmospheric pressure shale gas reservoir
A technology for shale gas reservoirs and volume fracturing, which is applied in the fields of fluid production, earth-moving drilling, wellbore/well components, etc., can solve the problems of reducing the complexity of fracturing fractures, low production and production, low production, and fast decline rate.
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[0083] A well in an atmospheric shale block has a vertical depth of 3876m, a sounding depth of 4932m, and a horizontal section of 1295m. The optimized design is carried out by the method provided by the present invention, and the steps and results are as follows:
[0084] (1) The evaluation of key shale reservoir parameters believes that the well has developed high-quality shale, with good static indicators, moderately high brittleness, and high-angle natural fractures in some sections.
[0085] (2) Determine the dual dessert area for geological desserts and engineering desserts (comprehensive desserts> 0.5) As the perforation cluster position.
[0086] (3) Establish a gas reservoir numerical simulation model, and use the orthogonal scheme to design the simulation scheme. The fracturing parameters for the long-term production after obtaining the optimal fracturing are as follows: fracturing 18 segments, the optimal fracture spacing of the main fractures is 14-22m, and the fracture ha...
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