Manufacturing method of artificial core with crevices for simulated leaking stoppage experiment

Abstract

The invention provides a manufacturing method of an artificial core with crevices for a simulated leaking stoppage experiment, which relates to the technical field of oil well operation, in particular to the technical field of leaking prevention during well drilling. A paraffin plate of which two reinforced surfaces are both curved surfaces is firstly manufactured; then a concrete core column of the paraffin plate, of which two clamping surfaces are both curved surfaces, are manufactured; and finally, the paraffin plate in the concrete core column is melted. The manufacturing process disclosed by the invention is simple and reasonable; through designing curved surface shapes of an upper curved surface plate and a lower curved surface plate, the lifelike concrete core column provided with inner irregular crevices can be acquired; through using paraffin, inner crevices can be conveniently formed; and through arranging fine lines in the paraffin plate, the paraffin plate has certain strength and is difficult to crack, and the fine lines can be conveniently drawn out of the concrete core column after the paraffin is melted. The concrete core column manufactured by adopting the method disclosed by the invention is used in a simulator for conducting the loss and leaking stoppage experiment, the acquired data is close to the actual situation, and oil well mining operation is facilitated.

Description

technical field [0001] The invention relates to the technical field of oil well operation, in particular to the technical field of drilling leakage prevention. Background technique [0002] Because the fractures in the formation are irregularly curved, with rough and uneven surfaces, in the absence of fluid, once the drilling fluid encounters such fractures, it will directly enter. Therefore, during the drilling process, leakage is often encountered, among various types of leakage, fractured leakage is a relatively common one. In the simulated plugging test in the laboratory, it is necessary to use large-scale fractured cores. Currently used to simulate fractures, two metal plates are used to keep them at a certain distance so that the plugging material can pass between the two plates to simulate downhole plugging. The advantage of this device is that the structure is simple, and the size of the crack can be adjusted; the disadvantage is that the crack is straight and smoo...

AI Technical Summary

Problems solved by technology

The advantage of this device is that the structure is simple, and the size of the crack can be adjusted; the disadvantage is that the crack is straight and smooth, and does not absorb water.

Using this kind of simulation device to do leakage and plugging experiments often differs greatly from the actual situation

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