Digital underground layering water injection testing and adjusting process pipe column and operation method thereof

A technique of pipe string and layered water injection, which is applied in the directions of measurement, earthwork drilling, wellbore/well components, etc., can solve the problems that the separate injection technology cannot meet the requirements, and achieve the reduction of operation risk, reduction of unsealing force, The effect of saving manpower and material resources

Active Publication Date: 2013-10-23
PETROCHINA CO LTD
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AI Technical Summary

Problems solved by technology

In order to improve the technical level of reservoir separate injection and improve operation efficiency, fine monitoring and analysis of the reservoir is required, but the current separate injection technology cannot meet the requirements

Method used

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  • Digital underground layering water injection testing and adjusting process pipe column and operation method thereof
  • Digital underground layering water injection testing and adjusting process pipe column and operation method thereof
  • Digital underground layering water injection testing and adjusting process pipe column and operation method thereof

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Embodiment

[0028] refer to figure 1 Embodiments of the present invention are further described:

[0029] The present invention uses a digital water distributor and a Y 344 water injection packer as the main process string, which is composed of the following components connected from top to bottom in sequence:

[0030] Tubing 1+ primary water injection packer 2+ tubing 1+ primary digital water distributor 3+ tubing 1+ secondary water injection packer 4+ tubing 1+ secondary digital water distributor 5+ tubing 1+ tertiary water injection Packer 6+ oil pipe 1+ three-stage digital water distributor 7+ anti-overflow check valve and eye pipe assembly 8.

[0031] The central inner tube 25 is connected between the upper joint 9 and the lower joint 10 of the digital water distributor, and the outer cylinder 16 is connected by a sealing joint 18. The central inner tube 25 communicates with the central hole of the upper joint 9 and the lower joint 10 to form a liquid flow channel 17;

[0032] The...

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Abstract

The invention discloses a digital underground layering water injection testing and adjusting process pipe column and an operation method thereof. According to the purpose, the instantaneous flow rate and the accumulative total injection rate of a single reservoir stratum can be monitored and recorded in real time underground, pressure of the reservoir stratum is monitored in real time, underground well shut-in layering pressure drop is tested, and bi-directional transmission of data and orders between a down-hole and the ground is carried out in a wireless mode. The process pipe column is formed by connecting a multistage digital water distributor and an Y344 water injection packer through an oil pipe, and eliminates steps of testing and allocating steel wires of the flow rate compared with an existing water distributor and a packer used for layering water injection. Meanwhile, the instantaneous flow rate and the accumulative total injection rate of the single reservoir stratum can be monitored and recorded in real time underground, the pressure of the reservoir stratum is monitored in real time, and the underground well shut-in layering pressure drop is tested. The pipe column can greatly reduce workloads of matching tests and pressure-drop tests of an oil field layering water injection well, provides the true and reliable accumulative total injection rate of the single stratum, and provides reliable evidence for policy adjustment of the oil field development technology.

Description

technical field [0001] The invention relates to a digital downhole layered water injection measuring and adjusting process string and a use method thereof, belonging to the technical field of oilfield water injection development. Background technique [0002] At present, domestic oil fields are mainly developed by layered water injection, and mature layered water injection technologies mainly include hollow split injection technology, concentric integrated split injection technology, conventional eccentric split injection technology and bridge type eccentric split injection technology. Mature supporting measurement and adjustment technologies mainly include steel wire operation measurement and adjustment technology and cable operation measurement and adjustment technology. Hollow split injection technology uses a hollow water distributor for layer water distribution, uses a steel wire operation to carry a flow meter to test the flow, and adjusts the flow by replacing the wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/20E21B43/14E21B33/122E21B47/00E21B47/06E21B47/117E21B47/26
Inventor 李明李安琪李忠兴慕立俊李宪文曾亚勤郭方元巨亚锋胡美艳于久政晏耿成
Owner PETROCHINA CO LTD
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