Method for testing high-temperature and high-pressure corrosion rate of multi-phase medium

Abstract

The invention discloses a method for testing a high-temperature and high-pressure corrosion rate of a multi-phase medium and relates to the technical field of corrosion rate testing, and the method is applied to a device for testing the high-temperature and high-pressure corrosion rate of the multi-phase medium and comprises the following steps of: respectively accessing corrosive gas and corrosive liquid into a gas-liquid stirring device and mixing them to form a gas-liquid mixture, accessing them into a preheater to be heated to the preset temperature; injecting the gas-liquid mixture into a high-temperature and high-pressure reactor through a gas-liquid mixture injection pipeline, and discharging it by a gas-liquid mixture discharge pipeline to form gas-liquid mixture fluid; confirming the corrosion rate of the to-be-detected metal in a gas-liquid mixture corrosion inductance probe through inductance change of an inductance probe tester. The method can solve the problems that the corrosion test in the present technology only can be executed in static environment so that dynamic environment in a pit is difficultly simulated, tested data isn't sufficiently accurate and the measuring speed is slower, and only the average corrosion rate in longer time can be obtained.

Description

technical field [0001] The invention relates to the technical field of corrosion rate testing, in particular to a method for testing multiphase medium high temperature and high pressure corrosion rate. Background technique [0002] Combustion oil recovery is an effective technology to enhance oil recovery. Compared with steam flooding oil recovery technology, it can be applied under harsher formation conditions, so it is a thermal recovery technology for heavy oil and residual oil. In the oil recovery process of burning oil reservoirs, the high temperature and high pressure environment of injection wells and production wells is very harsh. For example, during the ignition process of the injection well (such as electric ignition), the ignition temperature is generally about 450° C., and the wellbore of the oil layer section of the injection well will appear high temperature for a period of time. In addition, the air injected into the injection well will carry a certain amoun...

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Problems solved by technology

[0004] The embodiment of the present invention provides a method for testing the corrosion rate of multi-phase medium under high temperature and high pressure to solve the problem that the corrosion test in the prior art can only be tested in a static environment, it is difficult to simulate the dynamic environment in the well, the test data is not accurate enough, and the measured The problem is that the speed is slow and only the average corrosion rate can be obtained for a long period of time

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