Evaluation device and evaluation method for particle plugging material

Abstract

The invention provides an evaluation device and an evaluation method for a particle plugging material, and the evaluation device comprises: a simulation chamber, which is surrounded by a heating thermal insulation layer and is used for containing a to-be-tested particle plugging material; a hydraulic pressurizing cylinder body, which is internally provided with a hydraulic pressurizing plunger capable of moving, wherein the hydraulic pressurizing plunger is connected with an isolation plunger used for pressurizing the particle plugging material in the simulation chamber; a displacement sensor, which is arranged on the hydraulic pressurizing plunger; a first hydraulic pump, which is connected with the simulation chamber and used for conveying simulation drilling fluid into the simulation chamber so as to provide pressure for the simulation chamber. According to the method, the integrity rate and the deformation rate of the granular plugging material are calculated to reflect the strength, the temperature resistance and the soaking resistance of the particle plugging material, and a basis is provided for selection of the particle plugging material. The device can simulate the leakage environment of 20MPa and 150DEG C at most, and has a good guiding effect on selection of suitable particle plugging materials for leakage layers under different temperature and pressure environments.

Description

technical field [0001] The invention relates to the field of evaluation of oil drilling granular plugging materials, in particular to an evaluation device and evaluation method of granular plugging materials. Background technique [0002] Bridging plugging accounts for more than 50% of all plugging constructions. The properties of the particle plugging materials used have a great influence on the plugging effect. If the material properties are not up to standard, the plugging success rate will drop significantly. In particular, the commonly used granular plugging materials are bridging materials that form the “skeleton” of the plugging layer in the lost channel, laying the foundation for subsequent successful plugging. Therefore, granular plugging materials are very important for bridging plugging, and the properties of granular plugging materials directly affect the bridging plugging effect. [0003] At present, the conventional evaluation methods for granular leakage plug...

AI Technical Summary

Problems solved by technology

However, since most of the granular plugging materials used for bridging plugging are irregular in shape, especially fruit shell materials, it is difficult to make a standard module, and its strength index is difficult to accurately judge

Or, use the plugging slurry to indirectly evaluate the plugging performance of the granular plugging material, but it reflects the performance of the entire plugging slurry system, and cannot accurately reflect the physical properties of the granular plugging material

So far, there is no device for evaluating the strength of granular plugging materials under high temperature and high pressure environment. The existing methods are mainly to measure the strength of granular plugging materials after hot rolling under high temperature and high pressure, which cannot truly reflect granular particles. Strength of plugging material under high temperature and high pressure

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