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Method for measuring attenuation curve of seismic wave in rock by using laser receiving apparatus

A technology of laser reception and attenuation curve, which is applied in the analysis of solids using sonic/ultrasonic/infrasonic waves, which can solve problems such as being easily affected by human factors, and achieve good results in solving human-factor interference and automatic detection.

Active Publication Date: 2014-04-09
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

The main difference from the conventional method is that a non-contact laser receiving device is used, which avoids the inaccurate measurement caused by the irregularity of the rock sample surface, and the conventional receiving probe has a certain size limit that affects the setting of the receiving point distance. Conventional receiving probes require manual participation, and the results are easily affected by human factors.

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  • Method for measuring attenuation curve of seismic wave in rock by using laser receiving apparatus
  • Method for measuring attenuation curve of seismic wave in rock by using laser receiving apparatus

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Embodiment Construction

[0030] The present invention is further described below in conjunction with embodiment. The scope of the present invention is not limited by these examples, and the scope of the present invention is set forth in the claims.

[0031] The invention consists of the following parts: hardware combination (conventional excitation device, laser receiving device), acquisition method (arrangement of excitation and receiving points), and an attenuation curve that reflects the attenuation of the rock with the propagation distance according to the received waveform or energy. The content of the invention is as follows:

[0032] ①Hardware combination

[0033] The system hardware consists of a conventional ultrasonic transducer excitation probe (excitation), a laser vibrometer (such as a Doppler laser vibrometer for reception) and corresponding excitation and receiving supporting equipment.

[0034] The transmitting part of the system uses a conventional probe, which is placed on one side...

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Abstract

The invention relates to a method for measuring the attenuation curve of a seismic wave in a rock by using a laser receiving apparatus. The method is characterized in that apparatuses used in the invention comprise a routine ultrasonic energy transducer excitation probe belonging to an emission portion, a laser receiver belonging to a reception portion and corresponding excitation and reception matching devices; the emission portion adopts the routine probe, the routine probe is arranged on the surface at one side of a test rock sample and is fixed, and an excitation system emits certain ultrasonic waves; the reception portion adopts a non-contact laser receiving apparatus; there is no hardware contact between the reception portion laser Doppler vibrometer and a detection medium; and the focusing of a laser source on a detection point on a model is small, so enough small spacing measurement can be carried out.

Description

technical field [0001] The invention relates to the field of rock physical properties in seismic exploration, in particular to a method for researching and measuring the attenuation curve of seismic waves in rocks by using a laser receiving device. Background technique [0002] The propagation of seismic waves in rocks has a certain attenuation, and its attenuation characteristics are closely related to rock structure, physical properties, temperature, pressure, etc. The study of seismic wave attenuation characteristics in rocks is beneficial to the processing and interpretation of seismic exploration data and the analysis of rocks. Confirmation of physical parameters, etc., can better carry out oil and gas exploration. Generally speaking, the first research method of seismic wave attenuation in rock is to use actual seismic wave data for research, and the other is to use ultrasonic waves to test rock samples in the laboratory. The present invention belongs to the method of...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/11
Inventor 徐国庆王辉明
Owner CHINA PETROLEUM & CHEM CORP
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