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Remote detection acoustic wave offset imaging method, device and system

A technology of migration imaging and remote detection, applied in the field of petroleum exploration, to solve the problem of numerical dispersion, improve the accuracy, and improve the imaging accuracy.

Active Publication Date: 2019-05-03
PETROCHINA CO LTD
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Problems solved by technology

[0004] The purpose of the embodiment of this specification is to provide a remote detection acoustic wave migration imaging method, device and system, which can effectively solve the problem of numerical dispersion in the forward simulation process of the propagating wave field, and further eliminate the deviation caused by numerical dispersion illusion

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  • Remote detection acoustic wave offset imaging method, device and system
  • Remote detection acoustic wave offset imaging method, device and system

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[0047] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in one or more embodiments of this specification will be clearly and completely described below in conjunction with the drawings in one or more embodiments of this specification Obviously, the described embodiments are only some of the embodiments in the description, not all of them. Based on one or more embodiments in the description, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the embodiments of the description.

[0048] Migration imaging originates from ground seismic exploration. The main technology is to restore the transmitted signal received on the ground to the underground geometric space structure. Among them, reverse time migration requires cross-correlation imaging of the forward wave field and the backward wave field. The for...

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Abstract

The invention discloses a remote detection acoustic wave offset imaging method, device and system. The method comprises steps that remote detection acoustic wave log data of a target working area is subjected to reflection wave extraction to obtain reflection wave data; the time-space finite difference method is utilized to perform finite difference simulation processing for source wavelets and reflected waves to obtain a forward wave field and a back wave field; cross-correlation imaging is performed on the forward wave field and the back wave field to obtain the reverse time offset imaging result. The method is advantaged in that by using embodiments of the present specification, a numerical dispersion problem in forward simulation of the wave propagation field can be effectively solved,and the offset artifact caused by numerical dispersion is further eliminated.

Description

technical field [0001] The present invention relates to the technical field of petroleum exploration, in particular, to a remote detection acoustic wave migration imaging method, device and system. Background technique [0002] In remote detection acoustic logging, the acoustic wave detection instrument is placed at a specific depth in the well, and is excited by a specific sound source mode. The flexural waves generated in the wellbore will radiate to the deep formation in the form of longitudinal waves and shear waves. When encountering reflectors such as fractures and caves beside the well Reflected back into the wellbore to be received by the detection instrument. Compared with conventional array acoustic wave using borehole waves to detect formation physical properties, remote detection acoustic logging creatively uses reflected waves in logging to increase the original detection depth in the range of 1-3 meters to tens of meters (unipolar longitudinal wave remote detec...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28
Inventor 李雨生武宏亮刘鹏王克文冯周
Owner PETROCHINA CO LTD