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Multilateral well experimental model, system and sand filling method

An experimental model and experimental system technology, applied in the field of multi-lateral well physical simulation and multi-lateral well dynamic three-dimensional physical simulation, can solve the problems of multi-lateral well single well type, unable to simulate side, bottom water, water channeling, etc., to improve Experimental efficiency, accurate pressure distribution, and the effect of preventing water channeling

Active Publication Date: 2012-10-03
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] In order to overcome the problems that the three-dimensional physical simulation device of multi-branch wells in the prior art cannot simulate edge and bottom water; the well type of multi-branch wells is single and water channeling will occur during the displacement process, the present invention provides an experimental model of multi-branch wells , system and sand filling method

Method used

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  • Multilateral well experimental model, system and sand filling method
  • Multilateral well experimental model, system and sand filling method
  • Multilateral well experimental model, system and sand filling method

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Experimental program
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Embodiment 1

[0059] Figure 4 It is a structural diagram of a multilateral well experimental model provided by the embodiment of the present invention, such as Figure 4 As shown, the upper part 401 of the multi-branch well experimental model 400 is filled with experimental sand, the lower part 402 of the experimental model is used for filling bottom water, and a bottom water diffusion plate 403 is arranged between the upper and lower parts, and the bottom water A layer of gauze (not shown in the figure) is arranged between the diffusion plate and the upper part.

[0060] In the embodiment of the present invention, the multilateral well experimental model 400 may be a square container, which can withstand a high pressure of 12 MPa. The multi-branch well experimental model is divided into upper and lower parts. The upper part 401 is filled with sand to simulate the oil reservoir, and the lower part 402 is used to simulate the bottom water. The two parts are separated by a bottom water diff...

Embodiment 2

[0073] Figure 8 It is a structural diagram of a multilateral well experiment system provided by the embodiment of the present invention, as shown in Figure 8 As shown, the multilateral well experiment system 800 includes:

[0074] The multilateral well experimental model 801. In the embodiment of the present invention, the multilateral well experimental model 801 may be the multilateral well experimental model 400 or 500 described in the first embodiment.

[0075] The pressure sensing device 802 is connected with the multilateral well experimental model 801 and is used to sense the pressure at different positions in the multilateral well experimental model 801 and generate voltage signals.

[0076] The data processing device 803 is connected with the pressure sensing device 802 and is used to receive the voltage signal and generate simulation result data. In the embodiment of the present invention, the data processing device 803 can receive the voltage signal transmitted b...

Embodiment 3

[0085] A side water simulation device for a multi-branch well experimental model, the side water simulation device is arranged on the inner wall of the experimental model, the side water simulation device is an annular tube wrapped with gauze, the annular tube The diameter is 4mm, and a plurality of water outlet holes are distributed on the annular pipe, and the diameter of the water outlet holes is 0.5mm.

[0086] Such as Figure 5 As shown, the edge water simulation device 404 is arranged on the inner wall surface of the experimental model 500. The edge water simulation device 404 is an annular thin tube with holes, wherein the small holes are evenly distributed, the surface of the thin tube is wrapped with gauze, and the diameter of the annular tube is It can be 4mm, and the diameter of the outlet hole can be 0.5mm. During the experiment, water can be injected into the edge water simulation device 404 to ensure uniform water discharge from each small hole, thereby realizin...

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Abstract

The invention relates to a multilateral well experimental model, a multilateral well experimental system and a sand filling method. Experimental sand is filled into the upper part of the multilateral well experimental model, and the lower part of the experimental model is used for simulating bottom water. A bottom water diffusion plate is arranged between the upper and lower parts. A layer of gauze element is arranged between the bottom water diffusion plate and the upper part of the experimental model. According to the multilateral well experimental model, the influence of edge water and the bottom water of an oil reservoir on the productivity of a multilateral well and the distribution of a near-well pressure field is effectively simulated under boundary conditions closer to various boundaries such as the bottom water, the edge water and enclosure in a real oil reservoir environment, so that the influence of different boundary conditions on the productivity of an oil well can be obtained.

Description

technical field [0001] The present invention relates to the technical field of multi-lateral well physical simulation, in particular to the technical field of multi-lateral well dynamic three-dimensional physical simulation, and specifically relates to a multi-lateral well experimental model, system and sand filling method. Background technique [0002] A multilateral well refers to a well whose inclination angle reaches or is close to 90°, and the wellbore is drilled to a certain length along the horizontal direction. The wellbore of the multilateral well extends horizontally in the oil layer for a long period of time, and sometimes the inclination angle can exceed 90° for some special needs. Generally speaking, multilateral wells are suitable for thin oil and gas layers or fractured oil and gas reservoirs, with the purpose of increasing the exposed area of ​​oil and gas layers. [0003] Multilateral well physical simulation technology is a physical simulation experiment t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00E21B47/06E21B49/00E21B43/20
CPCE21B43/20E21B47/00E21B47/06E21B49/00
Inventor 韩国庆吴晓东朱明安永生高慎帅张睿曹光朋范卫潮高飞徐立坤张田
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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