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Compression processing method and device for multi-dimensional nuclear magnetic resonance logging data

A technology of nuclear magnetic resonance and logging data, applied in the field of oil and gas exploration, can solve the problems of slow inversion speed and low compression rate of multi-dimensional nuclear magnetic resonance logging data, and achieve the goal of increasing inversion speed, high compression ratio and fast compression process Effect

Active Publication Date: 2021-01-29
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0005] The present invention provides a compression processing method and device for multidimensional nuclear magnetic resonance logging data, which are used to solve the problems of low compression rate of compressed multidimensional nuclear magnetic resonance logging data and slow inversion speed of compressed multidimensional nuclear magnetic resonance logging data

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  • Compression processing method and device for multi-dimensional nuclear magnetic resonance logging data
  • Compression processing method and device for multi-dimensional nuclear magnetic resonance logging data
  • Compression processing method and device for multi-dimensional nuclear magnetic resonance logging data

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Embodiment Construction

[0043] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.

[0044] The specific application scenarios of the present invention are as follows. The invention relates to the technical field of logging data processing in oil and gas exploration. In oil and gas exploration, it is necessary to use nuclear magnetic resonance devices to measure oil wells or formations, that is, the process of nuclear magnetic resonance logging, in order to obtain mul...

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Abstract

The present invention provides a compression processing method and device for multi-dimensional nuclear magnetic resonance logging data, wherein the method includes: acquiring multi-dimensional nuclear magnetic resonance logging echo string data and multi-dimensional nuclear magnetic resonance logging kernel matrix; Carry out preliminary compression processing on string data, adopt window average method to carry out preliminary compression processing on kernel matrix; carry out one-dimensional discrete cosine transform to the echo string data after preliminary compression, obtain the first discrete cosine transform coefficient, and obtain the first low-frequency data; Perform two-dimensional discrete cosine transform on the initially compressed kernel matrix to obtain second discrete cosine transform coefficients, and obtain second low-frequency data; perform one-dimensional inverse discrete cosine transform on the first low-frequency data, and perform two-dimensional discrete cosine transform on the second low-frequency data Inverse discrete cosine transform is used to obtain compressed multi-dimensional nuclear magnetic resonance logging data. The compression method has a high compression rate, reduces the calculation amount of the nuclear magnetic resonance logging data inversion process, and improves the inversion speed.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration, in particular to a compression processing method and device for multi-dimensional nuclear magnetic resonance logging data. Background technique [0002] In oil and gas exploration, it is necessary to use nuclear magnetic resonance logging instruments to measure oil wells or formations to obtain reservoir pore fluid information. Multi-dimensional NMR logging, such as 2D NMR logging or 3D NMR logging, can simultaneously measure the lateral relaxation time T2, longitudinal relaxation time T1 and fluid diffusion coefficient D of reservoir pore fluids, which can be used in reservoir evaluation It is obviously better than one-dimensional nuclear magnetic resonance logging, but the amount of multi-dimensional nuclear magnetic resonance logging data is huge, and the inversion calculation of multi-dimensional nuclear magnetic resonance logging data directly is very large, which affects the...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T9/00
CPCG06T9/007G06T2207/10088
Inventor 谢然红谷明宣郭江峰金国文高伦
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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