Enhanced water injection oil extraction device and method for ultra-deep fracture-cavity type reservoir oil well

An oil production device and oil well technology, which is applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc., can solve problems such as large development costs, and achieve the effects of improving efficiency, saving supporting construction costs, and saving energy consumption

Pending Publication Date: 2022-04-12
成都汉科石油技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this application is to address the problems existing in the development of oil wells in ultra-deep fracture-cavity reservoirs, and to provide an enhanced water injection and oil production device and method for oil wells in ultra-deep fracture-cavity reservoirs, which can solve the problem that the development cost of traditional water injection methods is high in the past. The problem

Method used

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  • Enhanced water injection oil extraction device and method for ultra-deep fracture-cavity type reservoir oil well
  • Enhanced water injection oil extraction device and method for ultra-deep fracture-cavity type reservoir oil well
  • Enhanced water injection oil extraction device and method for ultra-deep fracture-cavity type reservoir oil well

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Embodiment 1

[0025] One of the specific implementations of an enhanced water injection oil recovery device for an ultra-deep fracture-cavity reservoir oil well of the present application, such as figure 1 As shown, it includes tubing 2, packer 3 and casing 1. In this embodiment, the casing 1 is set in the oil well, and the bottom end of the tubing 2 is inserted into the casing 1 and connected with the packer 3 . When the packer 3 is set, the outer peripheral side of the packer 3 is in close contact with the inner wall of the casing 1 . An annulus 11 is formed between the tubing 2 and the casing 1 , and the packer 3 is arranged in the annulus 11 and sheathed on the outer peripheral side of the tubing 2 . There is a high-pressure water layer 4 outside the oil well, and the casing 1 communicates with the high-pressure water layer 4 through perforation. The perforation 12 penetrates the casing 1 and goes deep into the rock formation in the high-pressure water layer 4 . The tubing portion of ...

Embodiment 2

[0043] The second specific implementation mode of the enhanced water injection and oil production device of the ultra-deep fracture-vug reservoir oil well of the present application, see figure 2 As shown, the main technical solutions of this embodiment are the same as those of Embodiment 1, and the features not explained in this embodiment are explained in Embodiment 1, and will not be repeated here. The difference between this embodiment and Embodiment 1 is that the oil production pump 24 is not needed in the tubing 2 of this embodiment, but only the downhole water injection pump 23 is provided, so that the oil production work can be carried out by means of blowout, while the downhole water injection pump 23 can still Play the role of increasing the water injection effect.

Embodiment 3

[0045] The third specific implementation mode of the enhanced water injection and oil recovery device for the ultra-deep fracture-vug reservoir oil well of the present application, see image 3 As shown, the main technical solutions of this embodiment are the same as those of Embodiment 1, and the features not explained in this embodiment are explained in Embodiment 1, and will not be repeated here. The difference between this embodiment and Embodiment 1 is: the oil production pump 24 and the downhole water injection pump 23 in the oil pipe 2 of the present embodiment are all arranged above the high pressure water layer 4, which is more convenient for the oil production pump 24 and the downhole water injection pump 23. control and installation. It should be noted that, in essence, the positions of the oil production pump 24 and the downhole water injection pump 23 can be selected and set according to actual needs, as long as they are installed in the oil pipe without affecting...

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Abstract

The invention relates to an enhanced water injection and oil extraction device and method for an ultra-deep fracture-cavity type reservoir oil well. The enhanced water injection and oil extraction device comprises an oil pipe, a water injection and oil extraction change-over valve, a packer, an underground water injection pump and a sleeve. The casing pipe is arranged in an oil well, the bottom end of the oil pipe is inserted into the casing pipe, the top end of the oil pipe is communicated with external oil extraction equipment, an annulus is formed between the pipe column and the casing pipe, and the packer is arranged in the annulus and arranged on the peripheral side of the pipe column in a sleeving mode. The casing pipe is communicated with a high-pressure water layer through a perforation, the pipe portion, right opposite to the perforation, of the oil pipe is an anti-erosion pipe portion, the water injection and oil extraction change-over valve and the underground water injection pump are arranged in the oil pipe, and the water injection and oil extraction change-over valve is used for controlling connection or disconnection of the interior of the oil pipe and the perforation and located above the high-pressure water layer in the height direction. The packer is located below the high-pressure water layer in the height direction and combined with an underground water injection pump. A high-pressure water layer encountered by drilling of an oil well can be used as a water injection source, enhanced water injection is achieved, a water source well does not need to be built, and device cost and development investment are saved.

Description

technical field [0001] The present application relates to the technical field of oil well production, in particular to an enhanced water injection oil recovery device and method for an ultra-deep fracture-cavity reservoir oil well. Background technique [0002] One of the important features of ultra-deep fracture-cavity carbonate reservoirs with a depth of more than 5,000 meters is that caves that are genetically related to faults, fractures, and karstification are the main oil storage spaces, and fracture surfaces or fractures are the main flow channels. , The matrix basically does not contain oil gas or contains little oil gas. It usually has the following characteristics: First, after multiple individual reservoirs on the plane, the reservoir units are mainly distributed along the source strike-slip faults, and the extension distance of the reservoirs along the fault line is as short as several thousand meters to more than ten kilometers, and as long as Then tens of kilo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/20E21B43/00E21B47/06
Inventor 王志军上官丰收邓松
Owner 成都汉科石油技术有限公司
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