Experimental device and method for mechanical sealing through ball sealers

Abstract

The invention provides an experimental device and method for mechanical sealing through ball sealers, and belongs to the technical field of sleeve sealing through the ball sealers in an oil reservoir ball put layering improvement technology. A water tank is used for holding fracturing fluid, a plunger pump is connected with the water tank through a pipeline, and an experimental tubing string is connected with the plunger pump through a pipeline. The experimental tubing string comprises a connector, a sleeve tubing string and a sleeve plug, wherein the connector, the sleeve tubing string and the sleeve plug are connected in sequence. The connector is communicated with the plunger pump through the pipeline. The sleeve tubing string is composed of a plurality of perforated sleeves in a sequential connection mode, the upper end of the sleeve tubing string is connected with the connector, and the lower end of the sleeve tubing string is sealed through the sleeve plug. According to the invention, the purpose of testing the minimum critical displacement for sealing of test holes through the ball sealers is achieved, the purpose of testing the influence of the number of the holes on the minimum fluid displacement for achieving sealing of the holes through the ball sealers is achieved, the purpose of testing the influence of the difference between the water absorption amount of stratums on sealing of the stratums through the ball sealers is achieved, and the guidance is provided for determination of the construction displacement of the fluid for conveying the ball sealers.

Description

technical field [0001] The invention relates to a plugging ball mechanical plugging experiment device and method, and belongs to the technical field of plugging ball plugging bushings in the ball-dropping layered reforming process of oil reservoirs. Background technique [0002] Layer-by-layer fracturing operations on reservoirs during well completion can increase the degree of production of reserves, increase single well production, and obtain good economic and social benefits. Layered fracturing using plugging balls has the advantages of simple use, less supporting equipment, low cost, and little impact on the wellbore, so it has been widely used; plugging ball layered fracturing is a kind of mechanical plugging Fracturing technology is suitable for layered fracturing construction of perforated oil and gas layers in multi-layer intervals with small intervals between reservoir layers and obvious reservoir stress difference. Open the reservoir section with low fracture pres...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a plugging ball mechanical plugging experimental device and method to solve the current problem of lacking the minimum fluid displacement required for testing the plugging ball mechanical plugging

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