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A digital dispensing test deployment system and method

A digital, regulating system technology, applied in the directions of measurement, earthwork drilling, and fluid extraction, to solve the low success rate and efficiency of test deployment and improve the level of intelligence

Active Publication Date: 2017-02-22
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems existing in the existing test and deployment technology of layered water injection, and solve the difficult problem of test and deployment of conventional technology in highly deviated wells, deep wells and produced water reinjection wells

Method used

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  • A digital dispensing test deployment system and method
  • A digital dispensing test deployment system and method
  • A digital dispensing test deployment system and method

Examples

Experimental program
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Effect test

Embodiment 1

[0034] In order to overcome the problems existing in the existing test and deployment technology of layered water injection, and solve the problem of test and deployment of conventional technology in highly deviated wells, deep wells and produced water reinjection wells. This embodiment provides a digital dispensing test deployment system, including a digital water distributor 5, a downhole measurement and control instrument and a ground control and adjustment system, and the downhole measurement and control instrument and the ground control and adjustment system are connected by cables;

[0035] The digital water distributor 5 is equipped with a wireless module 23, a central module 24, a flow testing system 28 and a flow regulating system 29; the downhole measurement and control instrument transmits the flow command of the ground control and regulating system to the wireless module 23 through a wireless signal, and the wireless module 23 will receive The received signal is tra...

Embodiment 2

[0039] On the basis of Example 1, such as figure 1 As shown, the flow test system 28 includes an orifice plate 16 symmetrically arranged on the inner wall of the flowmeter flow passage 11, a pressure guide pipe 18 drawn through the flowmeter flow passage 11, and a series of pressure guide pipes 18 connected in sequence and connected in series. Differential pressure sensor 12, positive one-way valve 13, reverse one-way valve 14 and bellows 15. 14 communicates with the upper and lower ends of bellows 15.

[0040]An induction piece 17 is arranged on the outside of the differential pressure sensor 12, and the induction piece 17 is connected with the central module 24 through a cable. The orifice plate 16 is inlaid on the inner wall of the flowmeter flow passage 11 to generate pressure loss for the measurement of the differential pressure sensor. The pressure guiding pipe 18 is drawn from the inner wall of the flowmeter flow passage 11 on both sides of the orifice plate 16 through...

Embodiment 3

[0044] This embodiment provides a digital dispensing test deployment method, comprising the following steps:

[0045] Step 1) Run the tool string into the oil well casing 2: from top to bottom, put the casing protection packer 4, digital water distributor 5, packer 6, preset working cylinder 7, check valve 8, screen The pipe 9 and the plug 10 are connected with the oil pipe 3 and then lowered into the casing 2, such as figure 2 As shown, the fluid injected into the water injection well by the water injection wellhead 1 reaches the digital water distributor 5 through the oil pipe 3, and enters the formation after automatic testing and deployment;

[0046] Step 2) Turn on the digital water distributor 5. Under the command of the central module 24, the motor 19 is turned on, and the power transmission rod 20 is driven to move, and the movable cylinder 22 moves downward to open the water nozzle 21 to the preset position to inject water into the oil and gas well ;

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Abstract

The invention belongs to the technical field of oil-gas well water injection, and particularly relates to a digital separate injection testing and adjusting system. The digital separate injection testing and adjusting system comprises a digital water distributor, an underground measurement and control instrument and a ground control adjusting system, wherein the underground measurement and control instrument is connected with the ground control adjusting system through a cable. By adopting the digital separate injection testing and adjusting system, automatic testing and adjustment are realized, the pressure flow is monitored and metered in real time, a repeated mechanical dropping-fishing procedure is omitted, and the problems of low testing and matching success rate and efficiency due to repeated dropping-fishing operations in the conventional process are completely solved; when injection allocation needs to be changed, the underground control instrument carried by the cable is in wireless butt joint with an underground digital water distributor for operation, and a testing and adjusting result and monitored history data can be synchronously displayed in a ground controller and a computer data acquiring and processing system, so that laminated water injection continuous monitoring and automatic injection allocation functions are realized, and the intelligence level of a testing and adjusting measure is raised. The digital separate injection testing and adjusting system has practical guidance significance to fine water injection.

Description

technical field [0001] The invention belongs to the technical field of water injection for oil and gas wells, and in particular relates to a digital separate injection test deployment system and method. Background technique [0002] Oilfield water injection development mostly adopts eccentric split injection process or bridge-type eccentric split injection process. Both of these two processes are tested and deployed based on the process of installing plugs in eccentric holes, and both require fishing operations for plugs. [0003] At present, with the deepening of oilfield development, the layered water injection process needs to test the flow rate of each small layer regularly, so as to grasp the water absorption status of each layer of the water injection well and the pressure change law of each layer system, and guide the reasonable allocation of test cycles. However, when steel wire or cable is used for operation, the number of times of repeated throwing and fishing in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/20E21B47/00E21B47/12
CPCE21B43/20E21B47/00E21B47/12
Inventor 于九政曾亚勤王子建杨海恩杨玲智
Owner PETROCHINA CO LTD
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