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Artificial core preparation method for fracturing performance testing of rocks containing controllable fractures

An artificial core and rock technology, applied in the field of artificial core preparation, can solve the problems of providing rock samples with controllable fractures, etc., and achieve the effects of low cost, simple operation and easy realization.

Active Publication Date: 2020-07-31
NORTHEAST GASOLINEEUM UNIV
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  • Description
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Problems solved by technology

[0005] An object of the present invention is to provide an artificial core preparation method for rock fracturing performance testing containing controllable fractures. Provide rock samples containing controllable fractures to test the performance of rock fracturing in reservoirs

Method used

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  • Artificial core preparation method for fracturing performance testing of rocks containing controllable fractures
  • Artificial core preparation method for fracturing performance testing of rocks containing controllable fractures
  • Artificial core preparation method for fracturing performance testing of rocks containing controllable fractures

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Embodiment 1

[0026] combine figure 1 As shown, this artificial core preparation method for testing the fracturing performance of rocks with controllable fractures:

[0027] Preparation of mixed cement slurry: Before making the rock sample, first polish the inner surface of the mold to smooth and apply butter, specifically: first, use a grinder to smooth the inner surfaces of the two outer steel plates 1, two inner steel plates 2 and the base 3, and use The bolts fix the two outer steel plates 1, the two inner steel plates 2 and the base 3, and at the same time apply butter evenly inside them. Using 425# cement, mix cement, water and quartz sand together in a ratio of 2:1:1 to make a cube rock sample with a side length of 300mm, in which the thickness of the polymer sheet is 0.1mm, the length is 3cm, and the width is 2cm.

[0028] When making mixed cement slurry: Stir cement, quartz sand and water together in a ratio of 2:1:1, add water first, then add defoamer, and then cement and quartz ...

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Abstract

The present invention relates to an artificial core preparation method for testing the fracturing performance of rocks containing controllable fractures. The artificial core preparation method for testing the fracturing performance of rocks containing controllable fractures: prepare mixed cement slurry; polish the mold to smooth , apply butter, insert the steel pipe from the center hole of the base into the mold, and the bottom of the steel pipe is exposed to the model; slowly pour the mixed cement slurry into the mold, after a certain amount, smooth the surface, and arrange some on the surface of the mixed cement slurry Polymer flakes, after the polymer flakes and the mixed cement slurry are stabilized, continue to pour the mixed cement slurry, continue to arrange the polymer flakes, and so on, until the mold is filled with the mixed cement slurry; the rock sample formed by the solidification of the mixed cement slurry is ground and formed , curing, and high-temperature treatment, until the polymer sheet is heated and decomposed into gas, and the generated pores are real fractures, and an artificial core for fracturing performance testing of rocks with controllable fractures is obtained. The rock samples formed by the invention can truly reflect the basic characteristics of fractures.

Description

technical field [0001] The invention relates to the technical field of stratum rock laboratory evaluation in the process of oil and gas exploitation, in particular to an artificial core preparation method for testing the fracturing performance of rocks containing controllable fractures. Background technique [0002] At present, hydraulic fracturing is an important technical measure for increasing the production of oil and gas wells and water injection wells. It is not only widely used in low-permeability gas reservoirs, but also has achieved good results in the stimulation of medium and high-permeability oil and gas reservoirs. The research on simulating the characteristics of reservoir hydraulic fracturing has become a hot spot. [0003] For indoor simulation of reservoir hydraulic fracturing characteristics, it is best to use natural rock samples with natural fractures. However, it is difficult to drill natural rock samples containing natural fractures in actual engineeri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/36G01N1/38G01N1/44G01N1/28
CPCG01N1/286G01N1/36G01N1/38G01N1/44G01N2001/366
Inventor 李玮龚小卫李思琪赵欢皮彦夫吴红军
Owner NORTHEAST GASOLINEEUM UNIV
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