Method for improving seismic data resolution

Abstract

The invention relates to a method for improving seismic data resolution, which belongs to the field of seismic exploration and seismic data optimizing process. The method comprises the steps of: filling an amplitude value of original seismic signals by utilizing a zero point of a first-order derivative of a seismic signal for sparsely pulsing the seismic signal, subjecting the seismic signal with reasonable seismic wavelets to convolution, and adopting bandpass filtering to obtain a final three-dimensional seismic data volume with improved resolution through setting a bandpass filtering range of a research target layer. The method overcomes the deficiency that the low frequency of the seismic data cannot be effectively maintained when increasing high frequency of the seismic data and the deficiency that the fidelity of the seismic data is decreased when increasing resolution of the seismic data, and increases the precision of using the seismic data for depicting sand-mudstone thin interbed reservoir.

Description

technical field [0001] The invention relates to a method for improving the resolution of seismic data, which belongs to the field of optimal processing of seismic data in seismic exploration. Background technique [0002] Domestic oil and gas exploration and development practices in recent years have shown that the field of increasing oil and gas reserves is mainly focused on tapping the potential of old oil fields and expanding oil fields, and the main target is thin sand-shale interbedded reservoirs. However, the characterization of thin sand-shale interbedded reservoirs requires higher and higher quality seismic data, one of which is the need for high-resolution seismic data. As we all know, the resolution of seismic data is determined by the main frequency and frequency band range (span) of seismic data, that is, seismic data with high main frequency and wide frequency band range have higher resolution. [0003] However, the main frequency of the three-dimensional high-...

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Problems solved by technology

[0005] The present invention aims to overcome the defects in the prior art that the low fidelity of seismic data makes the description of thin sand-mudstone interbedded reservoirs inconsistent with geolog

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