Diffracted wave imaging method and device, electronic equipment and storage medium

Abstract

The invention discloses a diffracted wave imaging method and device, electronic equipment and a storage medium. The diffracted wave imaging method comprises the steps of: acquiring seismic data, and preprocessing the seismic data, wherein the seismic data comprises a reflected wave and a diffracted wave; generating a common midpoint (CMP) gather according to the preprocessed seismic data; performing reflected wave velocity analysis operation on the preprocessed seismic data to obtain a reflected wave stacking velocity and a pre-stack time migration velocity field; carrying out dynamic correction processing on the CMP gather through utilizing the reflection wave superposition speed, and generating an offset vector sheet (OVT) gather in a sorting azimuth angle and offset mode; and performingfrequency wavenumber domain filtering processing on the OVT gather to obtain diffracted waves, and performing pre-stack depth migration processing on the diffracted waves to generate a diffracted wave imaging profile. According to the diffracted wave imaging method and the device, the diffracted waves can be better separated, so that the imaging resolution of the diffracted waves is improved, anda diffracted wave imaging profile with higher resolution is obtained.

Description

technical field [0001] The invention relates to the technical field of oil and gas field exploration, in particular to a diffraction wave imaging method, device, electronic equipment and storage medium. Background technique [0002] Existing reflection methods have made significant contributions to solving problems in the exploration and development of oil, natural gas, coal fields and other resources, as well as near-surface engineering, and have brought huge economic wealth to the society. However, for conventional reflection seismic exploration, with the increase in the complexity of geological problems, there are more and more disadvantages and problems. Reflection exploration technology mainly uses reflection waves to study underground geological conditions, while the actual type of seismic waves is Very rich, the reflected wave only carries part of the geological information, and the geological information obtained by only using the reflected wave to invert the geologi...

AI Technical Summary

Problems solved by technology

At present, the separation methods of diffracted waves at home and abroad are mainly based on the difference in travel time between reflected waves and diffracted waves, but the reflected waves at structural anomalies are often tangent to diffracted waves, and it is difficult to guarantee the energy of diffracted waves only based on travel time ; and the energy distribution range of diffracted waves in the pre-stack data is large, the wave field interference is serious, and the separation is very difficult

When the velocity of the medium changes strongly, the shape of the diffracted waves is more complicated, and they cannot be separated well

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