Indoor simulation experiment device and method for dynamic erosion corrosion of carbon dioxide to cement
A technology for simulating experimental equipment and erosion corrosion, which is applied in measurement devices, weather resistance/light resistance/corrosion resistance, instruments, etc. It can solve the problem of inability to realize dynamic erosion corrosion simulation, and achieve the effect of uniform corrosion and stable ion concentration.
Pending Publication Date: 2021-01-05
PETROCHINA CO LTD +2
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Problems solved by technology
The flow rate of the acidic solution is not only affected by the pressure difference between the two ends, but also related to the size of the micro-cracks. The existing simulation experimental devices cannot realize the CO 2 Simulation of dynamic erosion and corrosion of micro-cracks with different gaps in acidic solution
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[0051] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.
[0052] A preferred embodiment of the present invention is provided by way of illustration. Such as figure 1 As shown, the CO 2 The indoor simulation experiment device for dynamic erosion and corrosion of cement stone includes: reaction vessel 1, flow pump 7, carbonated water storage tank 8, CO 2 The gas cylinder 9 and the formation water source 10 are connected by anti-corrosion high-pressure diversion wires. The reaction vessel 1 is equipped with a control panel 2, and the reaction vessel 1 is equipped with a sealing cover 3, which is sealed by tightening the sealing bolt 4; the two sides of the reaction vessel 1 are...
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The invention discloses an indoor simulation experiment device and method for dynamic erosion corrosion of carbon dioxide to cement. The device comprises a reaction container, a flow pump, a carbonated water storage tank, a CO2 gas cylinder and a stratum water source; CO2 provided by the CO2 gas cylinder and a stratum water source is mixed with stratum water in the carbonated water storage tank, and then the mixture is conveyed into the reaction container through the flow pump. The reaction container comprises two heating plates which are symmetrically arranged and can move relatively are arranged in the reaction container; two fixing clamps fixedly connected to the opposite inner sides of the two heating plates respectively and used for fixedly installing a set cement test piece; and a power device used for driving the heating plates to move. According to the indoor simulation experiment device, dynamic updating of underground fluid can be achieved, the flow scouring and corrosion coupling process of acid fluid along a cementing surface containing micro-cracks and a cement body can be reflected, and the real condition that the underground cement is corroded by CO2 is better met.
Description
technical field [0001] The invention relates to the technical field of wellbore integrity evaluation, in particular to an indoor simulation experiment device and method for dynamic erosion and corrosion of cement by carbon dioxide. Background technique [0002] High in CO 2 Gas reservoir exploitation and CO 2 During the process of oil displacement and storage, there will be a problem that the cementing cement will contain CO 2 The acidic fluid corrosion problem. Cement and CO 2 After the acidic fluid contacts, its microscopic material composition and microscopic structure will change, resulting in the loosening of the cement structure and the generation of internal cracks, which will lead to the failure of the wellbore integrity, oil and gas or CO 2 Leakage along the wellbore enters the upper aquifer and the wellhead, pollutes the groundwater layer and forms annulus pressure, causing huge economic losses and hidden dangers in production safety, affecting high CO content ...
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IPC IPC(8): G01N17/00
CPCG01N17/00G01N17/002
Inventor 冯福平刘硕琼丛子渊严茂森张祯呼布钦
Owner PETROCHINA CO LTD