Multi-component data joint speed analysis method based on longitudinal and horizontal wave matching

Abstract

The invention provides a multi-component data joint speed analysis method based on longitudinal and horizontal wave matching and belongs to the field of geophysical exploration data processing. The method comprises the following steps: multi-parameter speed analysis is performed in a longitudinal wave field and a converted wave field synchronously by using a unified reflected wave time-distance equation of a longitudinal wave field and a horizontal wave field, and realizing synchronous contrast of speed trends of longitudinal waves and horizontal waves by using the synchronous comparison of a longitudinal wave channel set and a converted wave channel set; synchronously estimating relatively accurate vertical speed ratio of the longitudinal and horizontal waves through an indicator horizon, and obtaining accurate speed fields of the longitudinal and horizontal waves through section compression, the consistency principle of the depth and cycling speed iteration. Through the method, the converted wave seismic data can be processed accurately, and a seismic profile provided with high resolution, high fidelity and high signal-to-noise ratio, and can clearly reflect construction and lithological change characteristics can be obtained.

Description

technical field [0001] The invention belongs to the field of geophysical exploration data processing, and in particular relates to a multi-component data joint velocity analysis method based on longitudinal and shear wave matching. Background technique [0002] With the rapid development of multi-component exploration technology, multi-wave (that is, the data containing P-wave and converted wave, usually Z represents P-wave, X, Y represents converted wave), multi-component seismic exploration technology has been widely used in gas cloud imaging, hydrocarbon detection, fluid Lithology prediction and fracture detection methods have been applied, and have gradually played an irreplaceable role in structural imaging, lithology parameter extraction, and oil and gas reservoir identification. [0003] Due to the asymmetry of the converted wave ray path, the converted wave processing flow is different from that of conventional longitudinal wave data. Conventional converted wave vel...

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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the object of the present invention is to provide a multi-component data joint velocity analysis method based on P-S wave matching, which solves the problem of the asymmetry of the converted wave propagation path and the increase of the offset length of the three-component acquisition arrangement. and other factors make the velocity analysis of converted wave data more difficult and the accuracy of imaging decrease.

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