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Sand filling tube combination device for simulating fractured reservoir

A technology for simulating fractures and combined devices, which is applied in the direction of production fluid, wellbore/well components, earthwork drilling and production, etc. It can solve the problems that cannot simulate the water injection development of fractured reservoirs, and achieve the effect of delaying the water flooding speed

Inactive Publication Date: 2014-01-01
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the sand filling pipes are equal in diameter and fully sealed, which cannot simulate the water injection development of fractured reservoirs, so there are limitations in the indoor simulation process

Method used

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  • Sand filling tube combination device for simulating fractured reservoir
  • Sand filling tube combination device for simulating fractured reservoir

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The sand filling pipe assembly device of the present invention includes a cylindrical shell 4, capillary tubes 7, 8, which are used to provide seepage passages and cracks; wherein the cylindrical shell 4 and the capillary tube 7 are sealed and connected by a variable diameter joint C5; the cylindrical shell 4 The two ends are sealed and connected with the flange 10 through connecting screws; the flange is provided with a sealed pipeline joint 3; the two ends of the tee base are provided with a sealed pipeline joint 3; the tee base is connected with the cylindrical cylinder 4 through a stainless steel tube 2 , used to closely connect with the indoor displacement pipeline to provide a liquid flow channel; the end of the valve 9, the valve 11, and the end of the flange 10 are closely connected with the indoor displacement pipeline to provide a liquid flow channel.

[0021] When using the sand packing pipe combination device of the present invention, the valve 9 is opened an...

Embodiment 2

[0026] The connection method is as in embodiment 1

[0027] When using the sand packing pipe combination device of the present invention, the valve 9 is opened and the valve 11 is closed, so as to simulate the formation situation in which the starting position of the fracture is between the water injection well and the water outlet well in the low permeability oil field, and the end of the fracture is connected with the water outlet wellhead.

[0028] The inner diameter of the sand filling pipe is 38mm, the outer diameter is 50mm, and the length is 300mm; the diameter of the flange 10 is 78mm; the reducing joint C 5 is welded by a nut with a diameter of 12mm and a joint with an inner diameter of 1 / 16 inch. A hole with an inner diameter of 3 mm is opened in the middle of the nut; a capillary with an inner diameter of 200 μm, an outer diameter of 1 / 16 inch, and a length of 100 mm is used as a crack to simulate a natural fracture in the formation.

[0029] Keeping the water injec...

Embodiment 3

[0031] The connection mode of this combination device is as embodiment 1

[0032] When using the sand-packing pipe combination device of the present invention, the valve 11 is opened and the valve 9 is closed, so as to simulate the stratum situation in which fractures run through the water injection well and the water outlet well.

[0033] The inner diameter of the sand filling pipe is 20mm, the outer diameter is 30mm, and the length is 200mm; the diameter of the flange 10 is 40mm; the reducing joint D 18 is welded by a nut with a diameter of 12mm and a joint with an inner diameter of 1mm. A hole with an inner diameter of 3 mm is opened in the middle; capillary tubes with an inner diameter of 100 μm, an outer diameter of 1 mm, and a length of 100 mm are used for the fractures to simulate natural fractures in the formation.

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Abstract

The invention provides a sand filling tube combination device for simulating a fractured reservoir. The sand filling tube combination device comprises a sand filling tube which is formed by sealing at least one section of cylindrical barrel and flange plates at the two ends of the cylindrical barrel; outer interfaces are formed at the circle center positions of the flange plates at the two ends; the outer interfaces are connected with connecting pipes through connecting elements in a sealed way; the cylindrical barrel or the connecting pipes at the two ends of the flange plates of the sand filling tube are connected with one or more capillary tubes through diameter-variable joints. By the sand filling tube combination device for simulating the fractured reservoir, fractures in different sizes are simulated by the capillary tubes with different diameters, the stratum conditions of the fractured reservoir can be simulated very well, and the fractures at the positions different from the position of a water injection wellhead can be simulated by setting the positions of the capillary tubes; in the water injection development process of a natural fractured reservoir, the sand filing tube combination device has important guiding significance to determine a reasonable water injection mode and a reasonable water injection pressure and delay directional water channeling and flooding speed of an oil well.

Description

technical field [0001] The invention relates to a sand-filling pipe combination device, which belongs to a stratum simulation device in an indoor simulation process for exploring water channeling rules and improving polymer injection recovery in fractured oil reservoirs. Background technique [0002] Low-permeability fractured oil and gas reservoirs are widely distributed in major oil and gas fields or major basins around the world. They will be the main resource of the oil industry in the future and an important resource base for the oil industry to increase reserves and production for a considerable period of time in the future. The existence of fractures plays a dual role in oilfield development. On the one hand, it increases the water absorption capacity of the oil layer and makes up for the lack of permeability. In the area where fractures develop, oil and water wells generally have higher output and injection capabilities, and the production effect is better; On the on...

Claims

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Application Information

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IPC IPC(8): E21B49/00E21B43/20
Inventor 吴飞鹏毛森施盟泉
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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