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Attenuation coefficient detection method

A technology of attenuation coefficient and detection method, which is applied in the direction of measuring devices, measuring ultrasonic/sonic/infrasonic waves, and material analysis through optical means, which can solve the problems of ultrasonic amplitude and frequency response distortion, inaccurate detection results, etc., to avoid Effect of measurement error, assurance of accuracy and reliability

Inactive Publication Date: 2014-11-12
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

During the detection process, the coupling layer formed by the coupling agent on the surface of the measured object will change, which will cause the detected ultrasonic amplitude and frequency response to be distorted, resulting in inaccurate final detection results.

Method used

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Embodiment Construction

[0046] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0047] Also, in the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without the specific details or in the particular manner described.

[0048] In addition, the steps shown in the flow dia...

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Abstract

The invention discloses an attenuation coefficient detection method. The method comprises an amplitude detection step, namely based on a laser vibration measurement principle, respectively detecting sample amplitude data of a tested sample with a preset geometrical shape and a standard sample with a known attenuation coefficient; and an attenuation coefficient determining step, namely calculating the attenuation coefficient of the tested sample according to the sample amplitude data of the tested sample and the standard sample. According to the method, a non-contact laser vibration measurement technology is adopted, measurement errors brought by ultrasonic amplitude and frequency changes caused by change of a coupling layer in a conventional attenuation coefficient detection method are avoided, and the obtained attenuation coefficient result is relatively accurate and reliable.

Description

technical field [0001] The invention relates to the technical field of geophysics, in particular to an attenuation coefficient detection method. Background technique [0002] When the electromagnetic wave enters the rock, due to the heat energy loss of the eddy current, the amplitude of the electromagnetic wave will attenuate with the increase of the entering distance. This phenomenon is also called the absorption of the electromagnetic wave by the rock. The rock attenuation coefficient is used to measure the attenuation degree of the rock to electromagnetic waves, and it can also be called the rock absorption coefficient. [0003] With the deepening of oil and gas exploration, the processing and interpretation of seismic data is becoming more and more refined. As an important parameter used to represent rock properties, the attenuation coefficient of rock is much more sensitive to changes in the rock's environment than the wave velocity. Therefore, the detection of rock a...

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Application Information

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IPC IPC(8): G01N21/84G01H9/00
Inventor 周枫刘卫华李呈呈赵群周中彪
Owner CHINA PETROLEUM & CHEM CORP
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