Apparatus for testing propping effect of solid propping agent in hydraulic fracturing fluid, and method thereof

Abstract

The invention discloses an apparatus for testing the propping effect of a solid propping agent in a hydraulic fracturing fluid, and a method thereof. The apparatus comprises a sample slot seat, an X ray detector, a high-pressure water injection pump and a pressure tester. X-ray scanning, medical imaging, hydraulic fracturing and mechanical test are integrated to solve the test problem of the effect of a water-based fracturing fluid solid propping agent used in a shale gas exploitation hydraulic fracturing technology for the first time, especially imaging of the solid propping agent through the medical imaging technology is innovated, and the propping effect of the solid propping agent is assessed through tracking and observing the fluid state of the solid propping agent in a shale core crack and testing the absorption amount of the fracturing fluid backflow rock core to X-ray. The method is provided for the first time, is scientific and reliable, allows obtained experiment data to be accurate, and cannot be substituted by present other technologies.

Description

technical field [0001] The invention relates to the new technical fields of rock mechanics, material engineering and resource development, in particular to a device and method for testing the support effect of solid proppant in hydraulic fracturing fluid, which is mainly used for testing the effect of hydraulic fracturing fluid in shale gas exploitation. Background technique [0002] Horizontal well staged multi-stage hydraulic fracturing technology is one of the core technologies for shale gas exploitation. Hydraulic fracturing of shale gas reservoirs is to inject water-based fracturing fluid into shale formations sequentially through horizontal wells and adopt multi-stage fracturing, repeated fracturing and other processes at a pump pressure higher than the fracture pressure of the formation. Water-based fracturing fluid is to add a small amount of drag reducer, stabilizer, surfactant and other additives to clean water. The effect of water-based fracturing fluid after addi...

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Problems solved by technology

[0005] 1. The reliability is poor, the calculation method of the support breakage rate (η) is out of the original formation environment, and it is a pure pressure experiment

As disclosed in Chinese Patent Application No. 201210496497.1, a method for testing the anti-fragmentation ability of resin-coated proppant is to sieve the proppant mass (m 2 ) and original mass (m 3 ) ratio to calculate the proppant fragmentation rate (η), this method has poor reliability, and whether the solid proppant can meet the strength requirements in actual hydraulic fracturing operations still needs to be tested in practice;

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