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Visual logging video depth calibration method based on coupling data and inter-frame motion estimation

A technology of inter-frame motion and calibration method, applied in image data processing, measurement, calculation and other directions, can solve problems such as large errors, and achieve the effect of ensuring data accuracy

Pending Publication Date: 2022-05-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a visual logging video depth calibration method based on coupling data and inter-frame motion estimation, the purpose is to solve the problem of large errors in the traditional visual logging video depth calibration method; the method does not require a ground depth recording device , not only can automatically calibrate the video depth according to the coupling data table, but also greatly improve the accuracy of visual logging video depth calibration

Method used

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  • Visual logging video depth calibration method based on coupling data and inter-frame motion estimation
  • Visual logging video depth calibration method based on coupling data and inter-frame motion estimation
  • Visual logging video depth calibration method based on coupling data and inter-frame motion estimation

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Embodiment 1

[0045] The present invention provides a visual well logging video depth calibration method based on coupling data and inter-frame motion estimation, including the following steps:

[0046] Step 1: Carry out logging video acquisition;

[0047] Step 2: Read the logging video, identify the casing collar, and record the frame number in the video of the image where the collar appears;

[0048] Step 3: Extract coupling parameters: calculate the distance from the coupling to the camera;

[0049] Step 4: Fuse the identified coupling parameters with the coupling data table data, and calibrate the depth information of the coupling;

[0050] Step 5: Interpolating the coupling data through the inter-frame motion estimation method to obtain the depth data between the couplings.

[0051] It is worth noting that this visual logging video depth calibration method does not require a ground depth recording device, not only can automatically calibrate the video depth according to the coupling ...

Embodiment 2

[0053] Embodiment 2 includes all the technical features in Embodiment 1, specifically including:

[0054] The present invention provides a visual well logging video depth calibration method based on coupling data and inter-frame motion estimation, including the following steps:

[0055] Step 1: Carry out logging video acquisition;

[0056] Step 2: Read the logging video, identify the casing collar, and record the frame number in the video of the image where the collar appears;

[0057] Step 3: Extract coupling parameters: calculate the distance from the coupling to the camera;

[0058] Step 4: Fuse the identified coupling parameters with the coupling data table data, and calibrate the depth information of the coupling;

[0059] Step 5: Interpolating the coupling data through the inter-frame motion estimation method to obtain the depth data between the couplings.

[0060] It is worth noting that this visual logging video depth calibration method does not require a ground dep...

Embodiment 3

[0066] Embodiment three includes all technical characteristics in embodiment two, specifically includes:

[0067] The present invention provides a visual well logging video depth calibration method based on coupling data and inter-frame motion estimation, including the following steps:

[0068] Step 1: Carry out logging video acquisition;

[0069] Step 2: Read the logging video, identify the casing collar, and record the frame number in the video of the image where the collar appears;

[0070] Step 3: Extract coupling parameters: calculate the distance from the coupling to the camera;

[0071] Step 4: Fuse the identified coupling parameters with the coupling data table data, and calibrate the depth information of the coupling;

[0072] Step 5: Interpolating the coupling data through the method of inter-frame motion estimation to obtain the depth data between the couplings;

[0073] Step 6: Export the depth information and synchronously synthesize the depth information to th...

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Abstract

The invention discloses a visual well logging video depth calibration method based on coupling data and inter-frame motion estimation, and relates to the technical field of storage type visual well logging in the petroleum and petrochemical industry, the visual well logging depth calibration method is higher in distance measurement precision compared with existing distance measurement, and the problems of well logging cable extension, time asynchronization and the like are solved; the casing coupling is automatically identified by utilizing an edge detection technology, feature parameter extraction, feature matching and intelligent judgment, and the position of the image with the coupling in the video is recorded; according to the method, coupling parameters are intelligently and automatically extracted, and the distance from a coupling to a camera is calculated according to the proportional relation between the imaging distance of the camera and the imaging size; the method comprises the following steps of: interpolating coupling data by using a method based on inter-frame motion estimation to obtain depth data between couplings; according to the method, the accurately calibrated data is automatically merged with the video, and intelligent matching is carried out, so that the data accuracy is ensured.

Description

technical field [0001] The invention relates to the technical field of stored visual well logging in the petroleum and petrochemical industry, in particular to a method for calibrating the depth of visual well logging videos based on coupling data and inter-frame motion estimation. Background technique [0002] The storage-type visual logging technology equipment can store the downhole video in the internal memory of the downhole tool, and the surface tool records the length of the steel wire downhole and stores the depth information. Downhole video and surface depth information are recorded synchronously based on time. After the logging operation is completed, the depth information recorded on the ground is synchronously synthesized on the video screen. [0003] The traditional visual logging video depth calibration method has the following problems: 1. The depth record and video record time must be strictly synchronized, otherwise the time error will cause depth error; 2....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/04E21B47/00G06V20/40G06T7/13G06T7/55G06T7/80
CPCE21B47/04G06T7/80G06T7/55G06T7/13G06T2207/10016
Inventor 钱钦刘玉国伊西锋田玉刚魏剑飞卢雅兰文志平李海涛高恒超周景彩
Owner CHINA PETROLEUM & CHEM CORP
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