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Single-well multi-layer simultaneous injection recovery technique string

A process pipe string and pipe string technology, which is applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc., can solve the problems of high operation cost, many intermediate operation links in stages, and low oil production time efficiency, so as to improve oil production. The effect of aging and reducing operating costs

Inactive Publication Date: 2017-12-29
CNPC GREATWALL DRILLING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It overcomes the shortcomings of the existing single well injection and production process that need to be implemented alternately, there are many stages of intermediate operations, high operating costs, and low oil production timeliness

Method used

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  • Single-well multi-layer simultaneous injection recovery technique string

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Embodiment Construction

[0011] Such as figure 1 As shown, a single-well multi-layer simultaneous injection-production process string includes a dual-channel string 1; the dual-channel string 1 is composed of two independent channels, and the dual-channel string 1 and the dual-channel liquid flow exchange The devices 3 are alternately connected from top to bottom, and the lower end of the dual-channel liquid flow exchanger 3 is connected to the multi-functional steering head 5. The multi-functional steering head 5 can cooperate with the interlayer packer 2 in addition to the guiding function of the pipe string running in. Meet various sealing requirements. Interlayer packers 2 are respectively installed on the dual-channel tubing string 1 at the upper and lower ends of the dual-channel liquid flow exchanger 3, and the outer side of the dual-channel tubing string 1 and the technical casing 4 are sealed by the interlayer packer 2 so that each double-channel The channel liquid flow exchanger 3 is locate...

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Abstract

The invention relates to the technical field of oil and gas development, in particular to a single-well multi-layer simultaneous injection recovery technique string. According to the single-well multi-layer simultaneous injection recovery technique string, each double-channel string is composed of strings which constitute two independent channels, and the double-channel strings and double-channel liquid flow exchangers are alternately connected from top to bottom; the lower end of the double-channel liquid flow exchanger of the bottommost end is connected with a multifunctional guiding head, and the double-channel strings at the upper ends and the lower ends of the double-channel liquid flow exchangers are provided with interlayer packers correspondingly; and sealing is conducted between the outer sides of the double-channel strings and technique casing pipes through the interlayer packers, so that each double-channel liquid flow exchanger is located in a mining injection layer space. According to the single-well multi-layer simultaneous injection recovery technique string, simultaneous conducting of single-well multi-layer water injection or steam injection and oil recovery is achieved, the oil recovery time efficiency is improved, and the operation cost is reduced.

Description

Technical field: [0001] The invention relates to the technical field of oil and gas development, in particular to a single-well multi-layer simultaneous injection-production process string. Background technique: [0002] In the process of oil and gas development, in order to supplement formation energy, water injection or steam injection is often required for development. The existing injection-production technology is mainly divided into two situations: one kind of well is specially used for water injection or steam injection, and the other kind of well is specially used for oil production. This development plan is suitable for the overall development of blocks with clear horizons and complete injection-production pipeline networks. This is the case for most existing water injection development blocks and heavy oil steam flooding wells. The second situation is that the injection and production of a single well are alternated, that is to say, for a well, water injection or ...

Claims

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Application Information

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IPC IPC(8): E21B43/20E21B43/24
CPCE21B43/20E21B43/24
Inventor 邓旭刘乃震余雷喻晨朱忠伟尚宪飞李敏王馨萍胡靖邓晓立李跃孔栋梁严仁田赵展吴宁张雪李虎朱千千赵云
Owner CNPC GREATWALL DRILLING ENG
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