A method and device for compressing nuclear magnetic resonance echo data

A technology of echo data and nuclear magnetic resonance, which is applied in electron magnetic resonance/nuclear magnetic resonance detection, measurement devices, and re-radiation of sound waves. The effect of computing memory
CN105044794BActive Publication Date: 2018-02-09CHINA UNIV OF PETROLEUM (BEIJING)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA UNIV OF PETROLEUM (BEIJING)
Publication Date
2018-02-09

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Abstract

The invention relates to a method and device for compressing nuclear magnetic resonance echo data, wherein the compression method comprises: acquiring nuclear magnetic resonance echo data to be analyzed; using the nuclear magnetic resonance echo data to obtain principal components of the nuclear magnetic resonance echo data; A compression matrix is ​​constructed by using the principal components of the nuclear magnetic resonance echo data; and the nuclear magnetic resonance echo data is compressed by using the compression matrix. This technical solution can effectively eliminate the information that has little contribution to the characterization of formation characteristics or even redundant information in the original echo data, can still ensure the characteristics of the original data under the condition of high compression ratio, and can effectively prevent the loss of accuracy. Improve inversion speed and reduce computational memory.
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Description

technical field

[0001] The invention relates to the technical field of well logging data processing in oil and gas exploration, in particular to a method and device for compressing nuclear magnetic resonance echo data. Background technique

[0002] NMR logging needs to collect hundreds of echo data. Inverting a large amount of echo data requires a very large computer memory, and the calculation speed is very slow. And this large amount of echo data contains a lot of little or even redundant information that contribute little to characterizing formation properties. In particular, the application of two-dimensional and multi-dimensional nuclear magnetic resonance technology in identifying reservoir fluids makes the echo string data collected by nuclear magnetic resonance logging even larger. If data compression is not performed, a large amount of echo data can be directly inverted. It not only requires a very large computer memory, but also seriously affects the calculation ...

Claims

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