Non-stationary differential weighted superposition seismic data processing method

A seismic data, weighted stacking technology, applied in the field of seismic data target processing and interpretation, can solve the problems of difficult exploration and thin thickness, and achieve the effects of improving resolution, enhancing reflection contrast, and reducing impact

Active Publication Date: 2019-06-14
CHINA PETROLEUM & CHEM CORP +1
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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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  • Non-stationary differential weighted superposition seismic data processing method
  • Non-stationary differential weighted superposition seismic data processing method
  • Non-stationary differential weighted superposition seismic data processing method

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[0043] In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are listed below in conjunction with the drawings, which are described in detail as follows.

[0044] Such as figure 1 As shown, figure 1 It is a flowchart of the method for processing non-stationary differential weighted superimposed seismic data of the present invention.

[0045] S1. To ensure that the final data and the initial data have the same size, first extrapolate the two ends of the data. The number of extrapolated values ​​is half of the Gaussian window σ / 2, and then the data is windowed to obtain the preprocessed data after the window And the data used for the amplitude preservation processing in the numerical standardization processing of S4 The Gaussian window is: Among them, μ is the coordinates in the Gaussian window, and σ is the length of the Gaussian window (select parameters based on actual seismic data).

[0046] S2. F...

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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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/36G01V1/30
Inventor 于景强冯德永韩宏伟曲志鹏曹丽萍惠长松张莉孙兴刚
Owner CHINA PETROLEUM & CHEM CORP
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