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Experimental device and method for evaluating plugging and unblocking effects of plugging agent in perforation crack

An experimental device and plugging agent technology, which is used in measurement devices, suspension and porous material analysis, scientific instruments, etc., can solve problems such as plugging and plugging effect evaluation without considering temporary plugging

Active Publication Date: 2019-05-03
CHINA UNIV OF PETROLEUM (EAST CHINA)
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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.

Method used

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  • Experimental device and method for evaluating plugging and unblocking effects of plugging agent in perforation crack
  • Experimental device and method for evaluating plugging and unblocking effects of plugging agent in perforation crack
  • Experimental device and method for evaluating plugging and unblocking effects of plugging agent in perforation crack

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Embodiment Construction

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0043] It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

[0044] In addition, if there are descriptions involving "first", "second" and ...

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Abstract

The invention discloses an experimental device and method for evaluating the plugging and unblocking effects of a plugging agent in a perforation crack. The experimental device comprises a heater, a copper sleeve, a perforation crack block, an inlet plug and an outlet plug, a pressurizing device, and a plunger device. The heater has a heating chamber, a first inlet and a second outlet, wherein thefirst inlet and the second outlet are communicated with the heating chamber respectively and are arranged at the two ends. The copper sleeve extends in a lateral direction and is installed in the heating chamber; and a second inlet and a second outlet are arranged at the two ends of the copper sleeve. The perforation crack block extends in a lateral direction and is sleeved in the copper sleeve;a perforation slot and a crack slot are formed in the perforation crack block successively in a communicated manner in a lateral direction and are reduced gradually in a direction from the first inletto the first outlet, wherein the length of the perforation slot is less than that of the crack slot in a lateral direction.

Description

technical field [0001] The invention relates to the technical field of reservoir reformation, in particular to an experimental device and method for evaluating the plugging and unblocking effects of plugging agents in perforation fractures. Background technique [0002] 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 important measure for oil and gas well stimulation, hydraulic fracturing technology, such as hydraulic fracturing of perforated wells and horizontal wells, is widely used in the development of unconventional oil and gas reservoirs. However, in the process of hydraulic fracturing, the oil drainage area controlled by the fractures formed by fracturing is limited. How to increase the com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
CPCG01N15/08
Inventor 郭天魁巩法成曲占庆王晓之刘晓强齐宁张伟唐宋军宫远志谭碧君
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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