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Abnormal data detection and restoration method and system based on while-drilling electric imaging image

An abnormal data detection and imaging data technology, which is applied in the directions of surveying, earthwork drilling, character and pattern recognition, etc., can solve the problems affecting the image clarity and image quality of EWD imaging, and achieve the elimination of abnormal data and restore the original Image information, the effect of removing background differences

Pending Publication Date: 2021-10-22
CHINA PETROLEUM & CHEM CORP +2
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  • Application Information

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Problems solved by technology

However, due to the arduousness and complexity of the measurement environment in actual logging while drilling, there are often many abnormal data in the original electrical imaging while drilling data, which seriously affects the clarity and image quality of electrical imaging while drilling. , it is necessary to study a special technical solution for abnormal data detection and processing to deal with this situation

Method used

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  • Abnormal data detection and restoration method and system based on while-drilling electric imaging image
  • Abnormal data detection and restoration method and system based on while-drilling electric imaging image
  • Abnormal data detection and restoration method and system based on while-drilling electric imaging image

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Embodiment 1

[0031] figure 1 A schematic diagram showing the processing flow of the abnormal data detection and repair method based on electrical imaging while drilling images according to the embodiment of the present invention, refer to the following figure 1 to illustrate the steps of this method.

[0032] In step S101, measurement of electrical imaging while drilling data is performed.

[0033] Specifically, electrical imaging while drilling data are obtained by using electrical imaging while drilling.

[0034] It should be noted that the electrical imaging measurement data while drilling has the following characteristics: the instrument is rotated during the actual measurement process, and it measures data in multiple directions in the circumferential direction. The data obtained during the whole measurement process is a two-dimensional array data. Different columns represent the measured values ​​of different azimuths, and different rows represent the measured values ​​of different d...

Embodiment 2

[0072] Figure 5 A schematic diagram showing the functional structure of the system for detecting and repairing abnormal data based on electro-imaging images while drilling according to Embodiment 2 of the present invention. Refer below Figure 5 The composition and function of the system 60 will be described.

[0073] Such as Figure 5 As shown, the system 60 includes: a measurement depth normalization processing module 61 , an abnormal data detection and repair module 62 , an imaging data equalization processing module 63 and an imaging data display processing module 64 . The measurement depth normalization processing module 61, which performs the screening of the depth data and the depth resampling of the measurement data for the obtained electrical imaging measurement data while drilling; the abnormal data detection and repair module 62, which performs the electrical imaging while drilling The imaging measurement data is used to detect and repair abnormal data; the imag...

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Abstract

The invention discloses an abnormal data detection and restoration method and system based on a while-drilling electric imaging image. The abnormal data detection and restoration method comprises the steps that measurement depth standardization processing is carried out, and isodepth data screening and processing are carried out on the obtained while-drilling electric imaging measurement data; abnormal data are detected and restored, and abnormal data detection and restoration are carried out on the while-drilling electric imaging measurement data after measurement depth standardization processing; and imaging data equalization processing is carried out, imaging data equalization processing is carried out on the while-drilling electric imaging measurement data after abnormal data detection and restoration processing, and background differences of the measurement data in different directions are eliminated, so that features in the imaging image have continuity and balance. According to the abnormal data detection and restoration method, the abnormal data condition in the common while-drilling electric imaging image data can be effectively eliminated, the original image information can be well restored, and the image quality of while-drilling electric imaging can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of oilfield development, in particular to a method and system for detecting and repairing abnormal data based on electrical imaging images while drilling in a measurement-while-drilling environment. Background technique [0002] With the extensive application of highly deviated wells and horizontal wells in oil and gas exploration and development, it is difficult for conventional wireline logging tools to go downhole for measurement, and logging while drilling technology can realize real-time measurement during drilling, which can well solve this technical problem . At the same time, since the LWD is measured at the first time when the formation is drilled, the wellbore environment has a low degree of transformation to the formation, and the formation parameter information obtained by measurement at this time is closer to the original formation information, which can provide information for reservoir evaluat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/002E21B47/12G06K9/62
CPCE21B47/12G06F18/2433
Inventor 王卫吴非袁多张中庆
Owner CHINA PETROLEUM & CHEM CORP
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