Detection device and detection method for plugging performance of plugging agent

By using the cylinder structure and pressurization device that simulates the well wall in the plugging agent sealing performance detection device, the high-pressure environment in the well is simulated, and the problem that existing detection devices are difficult to evaluate the plugging agent sealing performance in the high-pressure environment is solved, and a more accurate plugging agent performance evaluation is achieved.

CN120102790APending Publication Date: 2025-06-06SINOPEC OILFIELD SERVICE CORPORATION +3
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Patent Information

Application Number
CN202311666770.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-12-06
Publication Date
2025-06-06

AI Technical Summary

Technical Problem

The existing plugging agent sealing performance detection devices are difficult to effectively evaluate the plugging performance of plugging agent in high-pressure environments, and cannot truly simulate the actual conditions in the well.

Method used

A detection device including a well wall simulating device, a sealing structure, a first pressing device and a second pressing device are designed. The simulation part is pressurized through the first pressurization device to make the crack surface tightly fit to prevent the drilling fluid from contacting the crack prematurely; the second pressurization device simulates the high-pressure environment in the well, so that the simulation part will automatically separate when the internal pressure is greater than the first pressure, forming a crack, and the drilling fluid begins to seal.

Benefits of technology

The device can evaluate the sealing performance of the plugging agent in a simulated high-pressure environment, bringing the detection results closer to the sealing performance of the actual well wall, and providing a more accurate evaluation of the plugging agent performance.

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Abstract

The invention relates to a device and a method for detecting the plugging performance of a plugging agent, and relates to the technical field of chemical plugging of oil fields. The first pressurizing device can pressurize the simulation part to fit the corresponding crack surface, the second pressurizing device pressurizes the first space formed by the well wall simulation device to simulate the high-pressure environment in the well, when the internal pressure of the first space is larger than the first pressure, the resultant pressure borne by the well wall simulation device is the pressure from inside to outside, and when the internal pressure of the second space is larger than the first pressure, the resultant pressure is the pressure from inside to outside. The adjacent simulation pieces are driven to be separated to define a crack, and at the moment, drilling fluid makes contact with the crack surface to start plugging work. The drilling fluid can be prevented from being in contact with the crack surface too early through the first pressurizing device, so that the crack generation time and environment are the same as those of the actual well wall crack, and the detected plugging performance better conforms to the plugging performance under the actual working condition.
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