Channeling-blockage physical simulation experiment device and effect evaluation method

An experimental device and physical simulation technology, applied in measurement devices, mechanical devices, instruments, etc., can solve problems such as the evaluation of no sealing effect, and achieve the effect of simple method, accurate simulation effect, and reduced interference.

Inactive Publication Date: 2019-03-22
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, the experimental devices and methods used to detect the effect of the channeling agent are generally to detect the cementation strength, that is, to detect the sealing strength formed by the sealing agent to block the channeling groove. The method of evaluating the effect of channel sealing by using the permeation flow rate at the cemented interface between pipe and cement

Method used

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  • Channeling-blockage physical simulation experiment device and effect evaluation method
  • Channeling-blockage physical simulation experiment device and effect evaluation method
  • Channeling-blockage physical simulation experiment device and effect evaluation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as Figure 1~3 As shown, it is a schematic structural diagram of a physical simulation experiment device for sealing channeling according to an embodiment of the present invention. The device includes a kettle body 4 and a casing 5, and a ring-pressed rubber sleeve 13 is arranged between the kettle body 4 and the casing 5. An annular cavity is formed between the ring pressure rubber sleeve 13 and the casing 5, and the cement ring 6 is inside the cavity; the upper and lower ends of the kettle body 4 are respectively provided with an upper flange 3 and a lower flange 20. The upper flange 3 and the lower flange 20 are respectively provided with a liquid injection hole 7 and a liquid outlet hole 15. The liquid outlet hole 15 is provided with a fifth switch 34 for controlling the opening and closing of the liquid outlet hole 15. The liquid injection hole 7 and the liquid outlet hole 15 are all connected with the inside of the kettle body 4; the upper flange 3 is an annu...

Embodiment 2

[0058] The method of using this device to evaluate the effect of blocking channeling:

[0059] It is mainly evaluated by comparing the permeation flow rate of the interface between casing 5 and cement before and after the sealing agent 29 is squeezed in under the same conditions, including the following steps:

[0060] (1) Measure the seepage flow Q of the cement sheath 6 and casing 5 cemented sealing system before the sealing experiment 1 , the specific steps are: ① Install the lower flange 20 first, then put the sealing system with channeling channels in the cemented interface between the cement sheath 6 and the casing 5, install the upper flange 3 and the small flange 2, and open the second Three switches 32 connect the output pipeline of the advection pump 12 to the liquid injection hole 7, and close the second switch 31 and the sixth switch 35; ②According to the needs of the experiment, use the hand pump 9 to pressurize the ring rubber sleeve 13 to cement and casing 5 Ad...

Embodiment 3

[0067] Use the above-mentioned device to simulate the sealing system method in which channeling channels exist at the interface between the cement sheath and the casing:

[0068] (1) Adhere the asphalt strips with fixed size and shape to the specified position on the outer wall of the casing 5, and the asphalt strips are connected to each other and connected to the lower hole of the casing;

[0069] (2) Install the lower flange 20 after evenly applying a high-temperature-resistant release agent on the inner wall of the ring pressure rubber sleeve 13, and put the lower flange 20 on the surface of the lower annular rubber sealing plate 17 that is in contact with the cement. Then screw the plug into the perforation hole 21 at the lower part of the casing 5 and put it in, pour the prepared cement slurry into the cavity between the casing 5 and the ring pressure rubber sleeve 13, and adjust the constant temperature control The device is maintained at a certain temperature for a cor...

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Abstract

The invention discloses a channeling-blockage physical simulation experiment device and an effect evaluation method. The channeling-blockage simulation physical experiment device comprises a kettle body and a sleeve, wherein an annular pressure rubber sleeve is arranged between the kettle body and the sleeve; a ring-shaped cavity is formed between the annular pressure rubber sleeve and the sleeveand is used as a cement ring; an upper flange and a lower flange are respectively arranged at the upper end and the lower end of the kettle body and are respectively provided with a liquid injecting hole and a liquid discharging hole which are respectively communicated with the ring-shaped cavity; the upper flange is a ring-shaped flange, a small flange for sealing the upper end of the sleeve is arranged at the middle part of the upper flange, and a pressurizing hole is formed in the center of the small flange; when a channeling blockage simulation experiment is carried out, a constant-flux pump is communicated with the pressurizing hole, and when the evaluation of the channeling blockage effect is carried out, the constant-flux pump is communicated with the liquid injecting hole. The physical channeling-blockage simulation experiment device disclosed by the invention has the beneficial effects that a channeling path can be formed in a simulation manner to carry out a channeling-blockage physical simulation experiment, and a new method for simply and accurately evaluating the channeling-blockage effect is established, so that convenience is brought for preferring a channeling-blockage agent according to the site condition, and an experimental result also can provide reference for site channeling-blockage operation.

Description

technical field [0001] The invention relates to a channel sealing physical simulation experiment device and an effect evaluation method, belonging to the technical field of oil and gas field development engineering. Background technique [0002] At present, with the continuous development of petroleum exploration and development, in the production process of oil and gas wells, affected by factors such as cementing measures, perforation, stress, water injection and corrosion, the deformation, perforation and damage of some oil and water well casings are very serious. Seriously, a gap is formed between the outer wall of the casing and the cement sheath or between the cement sheath and the formation drilling hole wall, which becomes a channel for fluid flow. This situation is called channeling outside the pipe, or channeling for short. When channeling occurs between two layers, the fluid in the high-pressure layer will flow to the low-pressure layer, seriously affecting the nor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/00
CPCG01N19/00
Inventor 王海文缪媛媛张津豪曹萌萌王忠博王琪
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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