Temporary plugging ball evaluation device and method for testing plugging performance of temporary plugging ball

Abstract

The invention discloses a temporary plugging ball evaluation device and a method for testing the plugging performance of a temporary plugging ball by using the same. The evaluation device comprises astorage bin, a cut-off valve, a flow guide chamber, a test cylinder and a pressure relief pipe which are sequentially connected from upstream to downstream, and a flowing channel allowing temporary plugging balls to sequentially flow is formed between the storage bin, the cut-off valve, the flow guide chamber and the test cylinder. The storage bin is used for storing temporary plugging balls and connected with a first water injection pipeline, and the first water injection pipeline is connected with the fluid pump. The stop valve is used for controlling the on-off state of a flow channel between the storage bin and the flow guide chamber. A second water injection pipeline, an overflow pipeline and a pressure relief pipeline are connected to the flow guide chamber, and the second water injection pipeline is connected with the fluid pump; at least one shot hole is formed in the periphery of the testing cylinder, the outer end of each shot hole is connected with a liquid discharging pipeline, and a temperature control structure is arranged on the periphery of the testing cylinder. The pressure relief pipe is connected to the tail end of the test cylinder, and a pressure relief valve is connected to the pressure relief pipe. The evaluation result of the method is objective, accurate and reliable, and the method is beneficial to accurately, reliably and effectively guiding the formulation and implementation of the subsequent fracturing process.

Description

technical field [0001] The invention relates to an experimental device, in particular to an evaluation device for a temporary plugging ball for fracturing, and a method for testing the plugging performance of the temporary plugging ball with the evaluation device. Background technique [0002] Fracturing technology is an important technical measure to improve the underground flow environment of oil and gas to increase production during the production of oil and gas wells, and selective fracturing with temporary plugging balls (ie plugging balls) is an important technical means in the fracturing process. . [0003] Temporary plugging ball selective fracturing is to use temporary plugging balls to plug the perforation blastholes that have already pressed the fractures, so as to force the formation to generate new fracturing fractures under the action of ground hydraulics. It can be seen that the successful implementation of the temporary plugging ball selective fracturing tec...

AI Technical Summary

Problems solved by technology

[0004] However, at present, the evaluation and judgment of the blocking performance of the temporary blocking ball is mostly realized by experienced technicians through experience estimation, which not only makes the evaluation and judgment of the blocking performance of the temporary blocking ball largely depend on the individual Subjective experience, and the results of this kind of evaluation and judgment have large errors, which will easily cause adverse effects on the targeted formulation of the fracturing process, increase the difficulty of the design and implementation of the fracturing process, and will also reduce the fracturing effect

If the plugging performance of the temporary plugging ball can be accurately and reliably objectively evaluated and judged in advance, it will have a reliable guidance basis for the formulation and implementation of the subsequent fracturing process; however, in the prior art, there has not been an intuitive and objective , Accurate and reliable experimental equipment for evaluating the plugging performance of temporary plugging balls appeared

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