Non-stationary differential weighted superposition seismic data processing method

Abstract

The invention provides a non-stationary differential weighted superposition seismic data processing method. The non-stationary differential weighted superposition seismic data processing method comprises the following steps: 1, performing Gaussian filter processing on original data to reduce an influence of noises on a signal of a reservoir; 2, performing sliding three-point smoothing processing on a seismic channel; 3, calculating an even-order derivative channel based on the smoothed data to highlight high-frequency information of a thin layer and a thin interbedding layer; 4, performing standard processing on a high-order derivative channel and amplitude-preserved processing based on a Gaussian window so that the processed data longitudinally has relatively high amplitude preserving performance; and 5, performing certain weighted superposition on the original data, the smooth data and the high-order derivative channel to acquire a final processed result. The non-stationary differential weighted superposition seismic data processing method provides high-quality data for carrying out subsequent attribute extraction, oil and gas reservoir identification and prediction of the reservoir, so that the exploration and development capabilities of the oil and gas reservoir of the thin layer and the thin interbedding layer are improved.

Description

Technical field [0001] The invention relates to the field of seismic data target processing and interpretation, in particular to a method for processing non-stationary differential weighted superimposed seismic data. Background technique [0002] Thin beds and thin interbeds are a very important type of oil and gas reservoirs. With the improvement of horizontal well technology and development techniques, these types of reservoirs that were not of much concern are being paid more and more attention by the oilfield exploration and development community. However, due to the thin thickness of such reservoirs, which is less than a quarter of the seismic wavelength, the seismic response will overlap and interfere with each other due to the tuning effect, so exploration is more difficult. The study of methods to improve the resolution of such reservoirs has important theoretical significance and production value. For this reason, we invented a new non-stationary differential weighted s...

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Problems solved by technology

However, due to the thin thickness of this kind of reservoir, which is less than a quarter of the seismic wavelength, the seismic responses will superimpose and interfere with each other due to the tuning effect, so the exploration is more difficult

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