Seismic scattering P-P wave imaging method

Abstract

The invention relates to a seismic scattering P-P wave imaging method which comprises the following steps: step 1: reading the seismic data into a two-dimensional array F, simultaneously loading observation system parameters into an original seismic data header, and calculating positions and coordinates of scattering points according to an observation system and acquisition parameters; step 2: according to the time-distance hyperbolic equation of scattering waves, under the condition of fixing t0i on a shot set, determining the scattering hyperbolic trace through the imaging speed, and then, calculating the seismic scattering P-P wave normal moveout; step 3: subtracting the seismic scattering P-P wave normal moveout from the seismic wave traveltime; step 4: calculating the weighted sum of the scattering amplitude of the hyperbolic trace from which the seismic scattering P-P wave normal moveout is subtracted on each shot-geophone distance, thereby realizing the seismic scattering P-P wave imaging; and step 5: outputting the imaging data in the seismic format. The invention has the characteristics of improving the stacking times of the horizontal stacking imaging technique and effectively improving the signal-to-noise ratio and the imaging precision.

Description

technical field [0001] The invention belongs to the technical field of seismic wave imaging processing, in particular to a seismic scattering P-P wave imaging method. technical background [0002] In actual seismic exploration, reflected waves are very limited in seismic wave components, and the propagation rules of reflected waves and other components of seismic waves are different. If the seismic waves of other components are treated with reflection theory, the imaging results obtained must be Inaccurate; in addition, the common center point (CMP) gather processing technology based on the time-distance hyperbolic theory of reflected waves is a set of processing technology developed for the horizontal layered uniform medium model. Strictly speaking, this technology is only applicable to horizontal Layered homogeneous medium, but in reality, this ideal situation hardly exists. There are insurmountable deficiencies and difficulties in the theoretical and practical applicatio...

AI Technical Summary

Problems solved by technology

There are insurmountable deficiencies and difficulties in the theoretical and practical application of traditional seismic imaging technology. Therefore, other processing technologies must be sought to improve or solve the problem of defects in the imaging effect of current seismic imaging technology, especially in areas with complex underground structures ( Such as piedmont fault zone, basin edge broken zone, frequent geological structure activity zone, etc.), heterogeneous prominent zone, geological structure is far from the horizontal layered uniform medium model (such as magmatic intrusion, metamorphic body, lens body, limestone karst caves, metal veins, etc.) and severely weathered areas near the surface, etc.

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