Reflecting interface orientation quantitative decision method based on phased receiving directivity and device thereof

Abstract

The invention provides a reflecting interface orientation quantitative decision method based on phased receiving directivity and a device thereof and relates to the field of petroleum geophysical exploration and acoustic wave signal processing technologies. The method comprises the following steps: a multichannel receipt signal acquired by each array element of an arc array receiver is read and a reflected wave signal is obtained; according to the reflected wave signal, phased synthetic reflected waveforms in multiple equally-spaced orientations within the range of circumferentially 360 degrees through phased synthesis, and a rough orientation range of a reflecting interface relative to the arc array receiver is determined according to size relation between peak-to-peak values of target reflection mode wave in each phased synthetic reflected waveform; and phased synthetic waveform in each orientation is obtained through a phased superposition treatment method in the preset first stepping orientation within the rough orientation range, an orientation variation curve of reflected wave amplitude is obtained according to the peak-to-peak value of the target reflection mode wave in each phased synthetic reflected waveform, and orientation and absolute orientation of the reflecting interface relative to the arc array receiver are quantitatively determined according to the orientation indicated by the maximum value of the curve.

Description

technical field [0001] The invention relates to the technical fields of petroleum geophysical exploration and acoustic signal processing, in particular to a method and device for quantitatively determining the orientation of a reflection interface based on phased receiving directivity. Background technique [0002] At present, with the continuous deepening of oil and gas exploration and development worldwide, oil and gas exploration tends to find small and medium-sized, subtle and complex structural oil and gas reservoirs. However, seismic exploration and conventional acoustic logging cannot meet the exploration needs of these oil and gas reservoirs due to their low resolution and shallow detection depth. In recent years, the emerging reflected acoustic wave imaging logging technology uses the sound field energy radiated from the sound source in the well to the formation outside the well as the incident wave to detect the sound field reflected from the acoustic impedance dis...

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Problems solved by technology

[0004] Embodiments of the present invention provide a method and device for quantitatively determining the orientation of a reflecting interface based on phase-controlled receiving directivity, to solve the problem that there is currently no simple and easy method that can accurately determine the orientation of a reflecting interface, and the reflected acoustic wave imaging logging method is not yet available. perfect question

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