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Digital rock core data parallel compression encoding method and parallel decompression decoding method

A digital core, compression coding technology, applied in the direction of code conversion, electrical components, etc., can solve the problems of incomplete digital core data, unrecorded digital core data dimensional information, digital core data cannot be parsed normally, etc.

Pending Publication Date: 2020-09-29
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] (2) The above two methods only record the pixel information of the digital core, but ignore the additional information such as the pixel size and source of the digital core
Therefore, the digital core data stored by the above two methods are not comprehensive
[0017] (3) The digital core data stored by the first method does not record the dimension information of the digital core data. Therefore, when the file is opened, if the dimension information of the digital core data is not known, the digital core data cannot be parsed normally

Method used

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  • Digital rock core data parallel compression encoding method and parallel decompression decoding method
  • Digital rock core data parallel compression encoding method and parallel decompression decoding method
  • Digital rock core data parallel compression encoding method and parallel decompression decoding method

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Embodiment 1

[0111]The characteristic of rock is that the pores and rock skeleton are relatively continuous distribution, rather than random random discrete distribution, which makes the 0 and 1 data of the digital core data volume have the distribution characteristics of a continuous period of 0, followed by a continuous period of 1. Based on this feature of the digital core, in this embodiment, the odd numbered positions are used to record the number of consecutive pixels that are pores, and the even numbered positions are used to record the number of continuous pixels that are skeletons. If the calculation is performed on the entire digital core data volume, firstly, there will be a large continuous area of ​​0 or 1, forming a large integer, which wastes storage space; secondly, the calculation speed is slow.

[0112] In order to overcome the above problems, this embodiment provides a digital core data volume parallel compression encoding method, the core idea of ​​which is to convert th...

Embodiment 2

[0178] This embodiment provides a method for storing coded digital rock core data.

[0179] Figure 5 It is a schematic flow chart of the storage method for digital core data encoding in Embodiment 2 of the present invention.

[0180] like Figure 5 As shown, the digital core data encoding storage method of this embodiment mainly includes the following steps S201 to S202.

[0181] In step S201, the dimension information code, size information code, description information code, data header code, and the digital core data body code obtained according to the method described in Embodiment 1 of the digital core data are sequentially connected to obtain the digital core data code . The specific format of digital core data encoding is as follows: Image 6 shown.

[0182] Among them, the dimension information coding, size information coding and description information coding of the digital core data are used as the summary and attribute information of the digital core to quickl...

Embodiment 3

[0198] This embodiment provides a parallel decompression and decoding method for digital core data, which is used to analyze the code of digital core data obtained according to the method described in Embodiment 2.

[0199] Figure 7 It is a schematic flow chart of the parallel decompression and decoding method for digital core data in Embodiment 3 of the present invention.

[0200] like Figure 7 As shown, the parallel decompression and decoding method for digital core data in this embodiment mainly includes the following steps S301 to S306.

[0201] In step S301, according to the first to fourth preset encoding methods and the first to fourth preset encoding digits in Embodiment 2, the digital core data encoding is decoded to obtain the dimension information encoding, Size information encoding, description information encoding, data header encoding and digital core data body encoding. The specific process is as follows:

[0202] Starting from the first digit of the digit...

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Abstract

The invention discloses a digital rock core data volume parallel compression encoding method, a digital rock core data encoding storage method and a digital rock core data parallel decompression decoding method. The volume of the digital rock core data volume can be greatly reduced, and the writing speed and the reading speed of the digital rock core data volume can be effectively improved. Besides, the stored digital rock core data can be more comprehensive, and the digital rock core data can be normally analyzed when the file is opened, and therefore the method has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of digital rock core data processing, in particular to a digital rock core data parallel compression encoding method and a parallel decompression decoding method. Background technique [0002] Assume that in the digital core, the binary value 0 is used to represent the pores, and the binary value 1 is used to represent the skeleton. Therefore, the digital core data can be understood as a three-dimensional image composed of 0 and 1. At present, the following two methods are usually used to process and store digital core data, wherein, the first method is to process and store digital core data in binary raw format, and the second method is to use image format (for example, tif format ) to process and store the digital core data. [0003] The specific process of the first method is as follows: [0004] (1) Sorting multiple pixel points of the digital rock core in the three-dimensional direction into a one-dim...

Claims

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Application Information

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IPC IPC(8): H03M7/30H03M7/40
CPCH03M7/3059H03M7/4012
Inventor 苟斐斐孙建芳秦学杰蒲军方文超刘海龙顾浩
Owner CHINA PETROLEUM & CHEM CORP
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