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Gas flow distribution device, gas distributor, tubular column for layered gas injection and method

A technology of distributing device and gas distributor, which is applied in earth-moving drilling, production of fluids, wellbore/well components, etc., can solve the problems of loss of control of flow, enlarged orifice, and high damage intensity.

Active Publication Date: 2021-01-12
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If there are solid impurities, the damage intensity will be greater, causing the pores to gradually become larger, and also lose the function of controlling the flow

Method used

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  • Gas flow distribution device, gas distributor, tubular column for layered gas injection and method
  • Gas flow distribution device, gas distributor, tubular column for layered gas injection and method
  • Gas flow distribution device, gas distributor, tubular column for layered gas injection and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0104] This embodiment provides a gas volume distribution device, the structural diagram of the gas volume distribution device 10 is as follows Figure 7a-Figure 7b shown, from Figure 7a-Figure 7b It can be seen from the figure that the gas volume distribution device includes: an outer tube 11, a gland 12, a filter screen 13 and a filling block 14 with a pore structure;

[0105] The outer tube is a hollow outer tube with an open upper end and a bottom at the lower end, and the bottom center of the outer tube is provided with a bottom hole 16; the hollow part of the outer tube is used to place a filling block with a pore structure, and the filling block and Sealing between the inner wall of the outer tube;

[0106] The bottom end of the gland is provided with a circular groove for placing the filter screen, and the filter screen is sealed with the inner wall of the circular groove; the top of the gland is evenly distributed with a number of top holes 15 passing through the gl...

Embodiment 2

[0118] This embodiment provides a gas distributor (such as Figure 8 As shown), the gas distribution device includes a core 4, the upper and lower ends of the outer wall of the core are respectively sleeved with O-rings 5, and the side wall of the core is also provided with side wall holes 18; wherein, the gas distribution device It also includes the gas volume distribution device 10 provided in the embodiment, which is arranged inside the core, and the bottom hole of the gas volume distribution device is connected with the side wall hole of the gas distributor through a pipeline.

Embodiment 3

[0120] This embodiment provides a pipe string for layered gas injection, the structural diagram of the pipe string for layered gas injection is as follows Figure 9 shown, from Figure 9 It can be seen from the figure that it includes the heat-insulated tubing 0, two packers (the first packer 21 and the second packer 22), two gas distributors provided in Embodiment 2 (the first gas distributor 23 and the second gas distribution device 24) and plug 8, the first packer, the first gas distribution device, the second packer and the second gas distribution device are sequentially connected to the heat insulation oil pipe at intervals, And the bottom end of this heat-insulating oil pipe adopts plug 8 to seal.

[0121] Wherein, the ratio between the permeability of the packing block with a pore structure used in the gas volume distribution device in the gas distribution device of different oil layers is the same as the ratio between the gas injection volume of the corresponding oil ...

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Abstract

The invention provides a gas flow distribution device, a gas distributor, a tubular column for layered gas injection and a method. The gas flow distribution device comprises an outer tube, a gland, afilter screen and a filling block with a pore structure; the outer tube is a hollow outer tube with the upper end open and the lower end provided with a bottom, and a bottom hole is formed in the center of the bottom of the outer tube; the hollow part of the outer tube is used for placing the filling block with the pore structure, and the space between the filling block and the inner wall of the outer tube is sealed; a circular groove for placing the filter screen is formed in the bottom end of the gland, and the filter screen and the inner wall of the circular groove are sealed; a plurality of top holes penetrating through the gland are uniformly distributed in the top end of the gland; and the gland is connected with the outer tube through an inner screw thread, and after the gland is connected with the outer tube, the filter screen and the filling block with the pore structure are compressed. The gas flow distribution device provided by the invention can distribute gas flow in proportion, and can show a very good distribution effect in the application process of five layers or below.

Description

technical field [0001] The invention relates to a gas volume distribution device, a gas distributor, a pipe string for layered gas injection and a method, belonging to the technical field of oil field development. Background technique [0002] Layered water injection technology is commonly used in medium and high permeability reservoirs, that is, according to the permeability and water absorption of the corresponding oil layer, the corresponding amount of water is injected, so that each oil layer can obtain high-quality oil displacement effect. Conversely, if the general water injection method is adopted, the relatively high-permeability oil layer becomes the main seepage channel, and most of the injected water flows along the high-permeability layer, while the relatively low-permeability layer distributes low water, and the oil displacement effect is significantly deteriorated. Conventional stratification technology lowers the packer 2 into the upper and lower ends of the c...

Claims

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Application Information

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IPC IPC(8): E21B43/16
CPCE21B43/168
Inventor 陈兴隆王敬瑶张成明王石头伍家忠任重
Owner PETROCHINA CO LTD