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A method for testing a water-pressurized downhole camera

A test method and camera technology, applied in construction and other directions, can solve problems such as difficult protection, contamination of camera lenses, inability to clean, etc., to improve the success rate and ensure safety.

Active Publication Date: 2017-11-07
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, this technology has not been widely used in production practice at present, mainly due to the long downhole distance and the influence of well wall attachments during use. Keeping on the axis of the well will result in incomplete shooting; on the other hand
Since oil, wax and other dirt are often attached to the well wall, the known downhole camera devices cannot avoid the contamination of the lens by these dirt, which will affect the clarity of the image
In addition, when the camera lens comes into contact with the above-mentioned dirt, it cannot be cleaned underground, thus affecting the accuracy of the test results
Therefore, the ubiquitous problem of camera lens contamination in downhole cameras has greatly affected the popularization and application of this technology.
[0004] Since there is no effective solution to the anti-contamination of the camera lens, for high-yield wells with low water cut, the camera is blocked by crude oil, and the test success rate is low. Therefore, there is no downhole camera without any oil pollution and cannot be directly used for downhole imaging of oil wells. on the test

Method used

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  • A method for testing a water-pressurized downhole camera
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Embodiment Construction

[0034] In order to have a clearer understanding of the technical features, purpose and effects of the present invention, the specific implementation, features and effects of the test method for the clear water pressure downhole camera of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments. . In addition, through the description of the specific implementation, the technical means and effects of the present invention to achieve the intended purpose can be understood more deeply and specifically. However, the attached drawings are only for reference and illustration, and are not used to limit the present invention. .

[0035] Such as figure 1 and figure 2 As shown, it is a schematic flow chart of the test method of the clear water pressure downhole camera of the present invention.

[0036] Wherein, the clear water pressing type downhole camera testing method proposed by the present invention comprises...

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Abstract

The invention provides a clean-water pumping type downhole camera testing method and is applicable to the technical field of oil well logging. By the clean-water pumping type downhole camera testing method, a stable clean-water liquid film is guaranteed at the front end of a camera lens, so that the camera can acquire clear downhole image data. Meanwhile, by the testing method, pumping pressure of a clean-water boosting pump and injection speed of clean water can be adjusted in real time according to downhole pressure and camera effect, so that test safety is ensured and accurate and effective image information can be obtained. Furthermore, by the testing method, downhole testing success rate can be effectively increased.

Description

technical field [0001] The invention relates to a method for testing a clear-water pressure-type downhole camera, and the method is particularly suitable for the technical field of petroleum well logging. Background technique [0002] The downhole camera is a test instrument that uses a visible light camera to view oil, gas, and water wells. Through this instrument, the casing damage, casing dislocation, downhole falling objects, perforation quality, and water injection effective direction of the measured well can be directly observed. Condition. [0003] However, this technology has not been widely used in production practice at present, mainly due to the long downhole distance and the influence of well wall attachments during use. Staying on the axis of the well will result in an incomplete shot; on the other hand. Since oil, wax and other dirt are often attached to the well wall, the known downhole camera devices cannot avoid the contamination of the lens by these dirt,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/002
CPCE21B47/002
Inventor 何金宝赵超邹杨冯紫微乔沐马强
Owner PETROCHINA CO LTD
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