Crack forming method for multiple scales of cracks
A multi-scale, fracture-making technology, applied in the direction of earth drilling, production fluid, wellbore/well components, etc., can solve the problems of low fracturing success rate of complex fractures, increased fracture complexity and fracturing construction success rate, etc.
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example 1
[0058] Example 1: Take a certain tight oil well X in China as an example to further illustrate the present invention:
[0059] (1) Precise evaluation of reservoirs before fracturing
[0060] Based on the results of the constant-speed mercury injection experiment, the microscopic pore-throat structure parameters of the core were obtained, and the basic parameters such as rock mechanical parameters and in-situ stress characteristics were obtained by using acoustic emission technology and dipole acoustic logging technology.
[0061] (2) Preparation of artificial rock samples
[0062] On the basis of (1), use natural quartz sand and cement with different particle sizes (100 mesh, 20 / 40 mesh, etc.) and mix them in different proportions to simulate the throat radius after classification in (1) to prepare a 300mm square large rock samples for use.
[0063] (3) Physical simulation experiment of core fracture rupture and expansion with different pore throat structure parameters
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example 2
[0077] Example two: Take a certain tight gas well Y in China as an example to further illustrate the present invention:
[0078] (1) Precise evaluation of reservoirs before fracturing
[0079] According to the results of constant-speed mercury injection experiments, the microscopic pore-throat structure parameters of the core were obtained, and the basic parameters such as rock mechanical parameters and in-situ stress characteristics were obtained by using acoustic emission technology and dipole acoustic logging technology.
[0080] (2) Preparation of artificial rock samples
[0081] On the basis of (1), use natural quartz sand and cement with different particle sizes (100 mesh, 20 / 40 mesh, etc.) and mix them in different proportions to simulate the throat radius after classification in (1) to prepare a 300mm square large rock samples for use.
[0082] (3) Physical simulation experiment of core fracture rupture and expansion with different pore throat structure parameters
[...
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