Remote exploration sound wave processing method

A processing method and remote detection technology, which is applied in the directions of measurement, earthwork drilling and production, borehole/well components, etc., and can solve problems that cannot meet the application requirements

Inactive Publication Date: 2015-04-22
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0002] The remote detection acoustic logging data processing method based on the conventional acoustic logging data processing method can only obtain formation information within a f...

Method used

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  • Remote exploration sound wave processing method

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Embodiment Construction

[0041] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, where the schematic embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0042] like figure 1 Shown, the processing method of far detection sound wave of the present invention is processed data according to following steps:

[0043] Step 1: Use the least squares deconvolution processing method to preprocess the dipole component waveform data of the remote sounding acoustic logging, reduce the oscillation period of the waveform, and improve the data imaging quality (see appendix figure 2 );

[0044] Achieved by the following formula:

[0045] FW ( t ) = W ( t ) * F ...

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Abstract

The invention discloses a remote exploration sound wave processing method. The method comprises the steps that (1) waveform data of remote exploration acoustic logging dipole components are preprocessed through a least square deconvolution processing method, and a waveform oscillation period is shortened; (2) the waveform FW(t) obtained in the second step is separated through a median filtering method to obtain a direct wave D(t), and the D(t) is subtracted from the FW(t) to obtain a reflected wave; (3) the reflected wave is separated through an f-k filtering method to obtain an upward reflected wave and a downward reflected wave, wherein time-domain waveform data under a fixed source distance are subjected to two-dimensional Fourier forward transformation, full-wave data are converted into a frequency-wavenumber domain, and the upward reflected wave apparent velocity and the downward reflected wave apparent velocity are finite values; (4) the upward reflected wave and the downward reflected wave which are separated are processed through a diffraction scanning migration stacking and imaging method; (5) filtering processing is conducted. By means of the method, according to the character that an orthogonal dipole probe is low in transmitting frequency during multi-pole subarray acoustic logging, the measured data can reflect far stratum information, and the orientation, dip angles and distribution of cracks and holes in a stratum far from a well can be obtained.

Description

technical field [0001] The invention relates to a processing technology of remote detection acoustic waves, in particular to a processing method of remote detection acoustic waves for obtaining structural information of several tens of meters outside the well by processing and analyzing the remote detection acoustic wave logging data. Background technique [0002] The remote detection acoustic logging data processing method based on the conventional acoustic logging data processing method can only obtain formation information within a few meters outside the well. With the development of exploration and development, acoustic logging can only provide information within a few meters around the well. Application requirements. The invention utilizes the dipole component data processing and analysis of the remote sounding acoustic logging to obtain formation structure information ranging from several meters to tens of meters around the well. Contents of the invention [0003] T...

Claims

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Application Information

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IPC IPC(8): E21B47/14E21B49/00
CPCE21B47/0224E21B47/095E21B47/14E21B49/00
Inventor 马修刚周军余春昊马骁杜钦波
Owner BC P INC CHINA NAT PETROLEUM CORP
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