A Method for Automatically Eliminating Steps in Dynamic Image of Well Logging Electrical Imaging
A dynamic image and electrical imaging technology, applied in image enhancement, image analysis, image data processing, etc., can solve problems such as difficult automatic realization, difficult grid setting, poor step elimination effect, etc.
Active Publication Date: 2021-11-12
CHINA PETROCHEMICAL CORP +4
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Problems solved by technology
However, the above-mentioned elimination method still has obvious defects: (1), the algorithm is complex, and the calculation amount is large; (2), the grid setting is difficult, and it is difficult to realize automatically; (3), the geometric alignment of the original image and the desired image is difficult Guaranteed, less effective step removal
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[0034] The invention provides a method for automatically eliminating steps in the dynamic image of well logging electrical imaging. The eliminating method has the characteristics of low algorithm complexity, fast operation speed, good effect of eliminating steps, and the like.
[0035] The invention provides a method for automatically eliminating steps in the dynamic image of well logging electrical imaging, such as figure 1 As shown, the elimination method includes the following steps:
[0036] Step 1: Set the first data depth range at the upper end of the dynamic image step of well logging electrical imaging and the second data depth range at the lower end of the dynamic image step of well logging electrical imaging, according to the local maximum of the logging data in the dynamic image range at the upper end of the step value, local minimum value, and the local maximum value and local minimum value of the logging data within the dynamic image range at the lower end of the...
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The invention belongs to the technical field of well logging electrical imaging image data processing, and in particular relates to a method for automatically eliminating steps in a dynamic image of well logging electrical imaging. A method for automatically eliminating steps in a dynamic image of well logging electrical imaging, including setting the first data depth range of the upper end of the step, setting the second data depth range of the lower end of the step, converting the upper gray image and the lower gray image; Extend the image downwards to obtain the first extended grayscale image, and expand the lower grayscale image upwards to obtain the second extended grayscale image; the obtained first extended grayscale image and the second extended grayscale image are obtained Perform image mixing within the step range to obtain a mixed grayscale image; map the image data in the mixed grayscale image to generate a color scale index value according to the gray value of the color color scale; inversely transform to obtain the logging data value and other steps.
Description
technical field [0001] The invention belongs to the technical field of well logging electrical imaging image data processing, and in particular relates to a method for automatically eliminating steps in a dynamic image of well logging electrical imaging. Background technique [0002] Micro-resistivity scanning electrical imaging logging is an important borehole imaging method, which uses multiple rows of button-shaped small electrodes on the multi-electrode plate to emit current to the borehole formation. Due to the difference in the rock composition, structure and fluid contained in the electrode contact, the change of the current is caused, and the change of the current further reflects the change of the rock resistivity in the well wall. This method has the characteristics of large coverage area and high resolution. . Through the image chromaticity calibration, the image logging data is scaled into the corresponding color scale, and the color static and color dynamic ima...
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IPC IPC(8): G06T5/00G06T5/50
CPCG06T5/001G06T5/50G06T2207/20016
Inventor 邢强张晋言刘云兰
Owner CHINA PETROCHEMICAL CORP