A temperature-activated water finding device and method for a horizontal well

A horizontal well and horizontal technology, which can be used in earth-moving drilling, wellbore/well components, measurement, etc., can solve the problems of long water-seeking period and high construction intensity, and achieve the advantages of simple operation, convenient construction and shortening of water-seeking period. Effect

Active Publication Date: 2022-01-04
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is to overcome the problems of long water search period and high construction intensity in the prior art

Method used

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  • A temperature-activated water finding device and method for a horizontal well

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Such as figure 1 As shown, a temperature-activated water finding device for a horizontal well includes a plug 1, a water finding unit, an oil pipe 5, and a swabbing device 6. The upper half of the oil pipe 5 is a vertical oil pipe, and the lower half of the oil pipe 5 is a horizontal oil pipe. , the swabbing device 6 is connected in the vertical tubing, and the water-seeking unit and the plug 1 are connected to the horizontal tubing sequentially from left to right; the water-seeking unit is lowered into a predetermined position through the tubing 5, and each section of the horizontal well is closed to resume testing The temperature and pressure are compared with the temperature and pressure recovery values ​​of each layer after the temperature is activated, and the main water-producing layers of the horizontal section are comprehensively judged to provide a basis for the later implementation of water shutoff. The method is convenient in construction and simple in operat...

Embodiment 2

[0026] Such as figure 1 Shown, on the basis of embodiment 1, a kind of horizontal well temperature excited water method: comprises the following steps:

[0027] 1) According to the number of fracturing stages in the horizontal well, the same number of temperature and pressure testers 2, downhole switches 3, and packers 4 are provided. The separator 4 divides the horizontal well into production intervals, and each production interval is correspondingly equipped with a temperature and pressure tester 2 and a downhole switch 3;

[0028] 2) After the temperature and pressure tester 2 is lowered into the preset position, the horizontal well is closed to perform the temperature and pressure recovery test of each production layer, and after the initial temperature and pressure recovery test data are obtained, the liquid is drained through the swabbing device 6, and the liquid level is , After the water content is stable, open the horizontal well and take out the swabbing equipment 6...

Embodiment 3

[0034] Such as figure 1 Shown, on the basis of embodiment 2, take Changqing Oilfield one 4 section horizontal wells as example, in conjunction with attached figure 1 The device and method for finding water by temperature excitation in a horizontal well are described.

[0035] A temperature-activated water finding device for a horizontal well, comprising a plug 1, four water finding units, an oil pipe 5, and a swabbing device 6, the upper half of the oil pipe 5 is a vertical oil pipe, and the lower half of the oil pipe 5 is a horizontal oil pipe, Swabbing equipment 6 is connected in the vertical tubing, and four water-seeking units and plugs 1 are connected to the horizontal tubing sequentially from left to right; the water-seeking unit includes temperature and pressure tester 2, downhole switch 3 and packing Device 4, packer 4, downhole switch 3 and temperature and pressure tester 2 are connected sequentially from left to right; the temperature and pressure tester 2 is an ele...

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Abstract

The invention belongs to the technical field of oil production in oilfields, and in particular relates to a temperature-activated water finding device and method for a horizontal well, including a plug, a water finding unit, an oil pipe, and a swabbing device. The upper half of the oil pipe is a vertical oil pipe, and the lower half of the oil pipe The section is a horizontal oil pipe, and the swabbing equipment is connected in the vertical oil pipe, and the water finding unit and the plug are connected to the horizontal oil pipe in turn from left to right; it solves the problems of long water finding period and high construction intensity in the existing method, The method further shortens the water search period, improves the water search efficiency, and reduces the labor intensity of on-site construction personnel. The method is convenient in construction and simple in operation, and can effectively reduce the test cost.

Description

technical field [0001] The invention belongs to the technical field of oil production in oil fields, and in particular relates to a temperature-activated water finding device and method for a horizontal well. Background technique [0002] Changqing Oilfield is a typical "three-low" reservoir, and oil wells need to be developed through fracturing and water injection to supplement energy. With the continuous improvement of reservoir fracturing technology, horizontal well development has become an effective means to increase the single-well production of oil wells. However, due to the development of fractures in the reservoir and the development of water injection, during the development process, it was exposed that the water cut increased rapidly, and the development contradiction of increasing water wells seriously affected the normal productivity of horizontal wells. In order to restore the normal productivity of oil wells, it is necessary to accurately find out the water out...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/06E21B47/07
CPCE21B47/06E21B47/07
Inventor 崔文昊周志平甘庆明吕亿明王百朱洪征常莉静苏祖波
Owner PETROCHINA CO LTD
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