An acid resistance test system for fracturing proppants

Abstract

The invention discloses an acid-resisting test system used for fracturing propping agents. The acid-resisting test system comprises an acid preheater, a tester, a press, an acid storage tank, an acid metering pump and a cooler. An open material containing cavity is formed in a shell of the tester, and a liquid inlet and a liquid outlet are formed in the shell and communicated with the material containing cavity. The tester further comprises a gland suitable for being inserted into the material containing cavity, the gland is matched with the bottom and the inner wall of the material containing cavity to form a space containing the fracturing propping agents, and a material clamping plate is arranged between the gland and the bottom of the material containing cavity. The press is suitable for exerting pressure on the fracturing propping agents through the gland. Acid liquor of the acid storage tank is pumped into the acid preheater through the acid metering pump for being heated, after being heated, the acid liquor enters the material containing cavity through the liquid inlet to be used for acid-resisting tests. The used acid liquor returns to the acid storage tank for being used in a recycled mode after cooled by the cooler. The system can be used for the acid-resisting tests of the fracturing propping agents in a simulated high-temperature high-pressure acid environment of underground strata.

Description

technical field [0001] The invention relates to a device for acid resistance testing of fracturing proppant used in the fracturing process of oil and natural gas wells, and belongs to the technical field of proppant. Background technique [0002] Fracturing proppants are usually quartz sand or artificial ceramic particles with a certain particle size. The function of the fracturing proppant is to support and fill in the fractures of the fractured rock formation to prevent the fractures from being closed due to stress. It has a great influence on the conductivity of cracks. [0003] Many oil and gas wells exploited at present are unconventional sour oil and gas reservoirs. The fracturing proppant needs to be in the acidic underground rock formation environment for a long time, which requires the fracturing proppant to have good acid resistance, so it is usually used before use. The acid resistance of the fracturing proppant was investigated. At present, the acid resistance...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the equipment used to simulate the reservoir environment is not provided in the prior art, resulting in the simulated temperature and pressure cannot be effectively controlled, and then a method that can accurately control the temperature and pressure to simulate the underground rock formation is proposed Environmental fracturing proppant acid test device

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