Experimental device and method for evaluating the plugging effect of temporary plugging agent in perforation shot hole temporary plugging ball and fracturing crack

Abstract

The invention discloses an experimental device and method for evaluating the plugging effect of a temporary plugging agent in a perforation shot hole temporary plugging ball and a fracturing crack, and the experimental device for evaluating the plugging and unplugging effects of the plugging agent in the perforation crack comprises a heater, a copper sleeve, a perforation crack block, an inlet plug, an outlet plug, a pressurizing device, and a plunger device. The heater is provided with a heating cavity, a first inlet and a first outlet, the first inlet and the first outlet are formed in the two ends and communicated with the heating cavity respectively, the copper sleeve extends transversely and is installed in the heating cavity, a second inlet and a second outlet are formed in the two ends of the copper sleeve, and the perforation crack block extends transversely and is connected into the copper sleeve in a sleeved mode. The perforation crack block is provided with a perforation groove and a crack groove which are sequentially formed in the transverse direction in a penetrating mode, the perforation groove and the crack groove are gradually shrunk in the direction from the firstinlet to the first outlet, and in the transverse direction, the length of the perforation groove is smaller than that of the crack groove.

Description

[0001] This application is a divisional application, the application number of the original application is 201910143877.9, the application date is February 26, 2019, and the title of the invention is "Experimental device and method for evaluating the plugging and unplugging effects of plugging agents in perforation fractures". technical field [0002] The invention relates to the technical field of reservoir reconstruction, in particular to an experimental device and method for evaluating the plugging effect of a temporary plugging ball in a perforated blasthole and a temporary plugging agent in a fracturing fracture. Background technique [0003] In recent years, as the development of conventional oil and gas reservoirs has generally entered the middle and late stages of development, the decline in output of mature oil fields has accelerated, and the development of unconventional oil and gas reservoirs in my country has entered a golden period of rapid development. As an imp...

AI Technical Summary

Problems solved by technology

Relevant literature discloses an evaluation device for plugging and plugging removal effects of plugging agents in perforated fractures. Although it can be used to simulate the temporary plugging process of fracture diverting agents, it does not consider the evaluation of plugging and plugging removal effects of temporary plugging agents in the perforation fracture shape.

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