Statics correction method based on seismic data

Abstract

The invention discloses a statics correction method based on seismic data, and particularly relates the statics correction method for a surface layer model which is established based on the shot point well depth. According to the statics correction method based on seismic data, the shot point well depth data are adopted when seismic data are collected, the well depths of all demodulator probes are obtained through interpolation, and the well depth value is virtual shot spot well depths of the demodulator probes. The shot point statics correction value and the demodulator probe statics correction value can be calculated according to the elevation of the shot point and the elevation of the demodulator probes and on the premise that the base level and replace speed are given. The demodulator probe statics correction value is the sum of the statics correction value of the water level of the demodulator probes and the statics correction value of a final base level of the water level. The shot point statics correction value and the demodulator probe statics correction value are used for conducting base level correction and eliminating time difference generated in the seismic record due to the fact that the lateral variation of the surface relief and the water level is uneven. The seismic data processed through the statics correction method can solve the statics correction problems that few micro log data exist and the signal-to-noise ratio of the seismic data is low. The signal-to-noise ratio and resolution ratio of seismic data imaging are improved, and the construction and accurate implementation of seismic data imaging are facilitated.

Description

technical field [0001] The invention relates to the field of geophysical prospecting, in particular to a static correction method based on seismic data, which is particularly suitable for the static correction method for establishing a surface layer model using shot point well depth. Background technique [0002] Static correction is an important link in seismic data processing. Static correction methods include elevation static correction, refraction wave static correction, micro-log static correction, and combined static correction methods. The elevation static correction assumes a single medium for the surface condition, and the accuracy of this method is low in practical applications; although the refraction wave static correction has high accuracy, it is prone to space problems when applied in seismic exploration areas with large surface elevation changes. Low-frequency false structure phenomenon; micro-logging static correction directly applies micro-logging data, and ...

AI Technical Summary

Problems solved by technology

However, for areas where micro-logging data are sparse or lacking, the current combined static correction method cannot be effectively applied

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