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

Active Publication Date: 2018-02-09
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
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Problems solved by technology

However, the combined method of window averaging and singular value truncation is more complicated and not suitable for popular application.

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  • A method and device for compressing nuclear magnetic resonance echo data
  • A method and device for compressing nuclear magnetic resonance echo data
  • A method and device for compressing nuclear magnetic resonance echo data

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Embodiment Construction

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0050] Such as figure 1 As shown, it is a flowchart of a method for compressing nuclear magnetic resonance echo data proposed by the present invention. include:

[0051] Step 101): Obtaining the NMR echo data to be analyzed;

[0052] Step 102): Using the nuclear magnetic resonance echo data to obtain the principal components of the nuclear magnetic resonance echo data;

[0053] Step 103): Using the principal components of the nuclear magnetic resonance echo...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/38G01V3/32
Inventor 谢然红丁业娇邹友龙郭江峰
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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