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Non-stationary Differential Weighted Stacking Seismic Data Processing Method

A technology of seismic data and weighted superposition, applied in the field of seismic data target processing and interpretation, can solve problems such as difficulty in exploration and thin thickness, and achieve the effects of improving resolution, enhancing reflection contrast, and improving exploration and development capabilities.

Active Publication Date: 2021-07-20
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 Stacking Seismic Data Processing Method
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  • Non-stationary Differential Weighted Stacking Seismic Data Processing Method

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Embodiment Construction

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

[0044] Such as figure 1 as shown, figure 1 It is a flow chart of the non-stationary differential weighted stacking seismic data processing method of the present invention.

[0045] S1, in order to ensure that the size of the final data is consistent with the initial data, first extrapolate the data at both ends, the number of extrapolated values ​​is half of the Gaussian window σ / 2, and then window the data to obtain the preprocessed data after windowing 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 coordinate in the Gaussian window, and σ is the length of the Gaussian window (the parameters are selected according to the actual seismic data...

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Abstract

The present invention provides a method for processing non-stationary differential weighted stacking seismic data. The non-stationary differential weighted stacking seismic data processing method includes: step 1, performing Gaussian filter processing on the original data to reduce the influence of noise on reservoir signals; step 2 , perform sliding three-point smoothing on the seismic traces; step 3, calculate even-order derivative traces on the smoothed data to highlight the high-frequency information of thin beds and thin interbeds; step 4, perform normalization processing on high-order derivative traces and Gaussian window-based amplitude preservation processing makes the processed data have better amplitude preservation in the longitudinal direction; step 5, the original data, smoothed data and high-order derivatives are superimposed according to a certain weight to obtain the final processing result. The non-stationary differential weighted stack seismic data processing method can provide high-quality data for subsequent attribute extraction, reservoir identification and reservoir prediction, thereby improving the exploration and development capabilities of thin-bed and thin-interbed reservoirs.

Description

technical field [0001] The invention relates to the field of seismic data target processing and interpretation, in particular to a non-stationary differential weighted stacking seismic data processing method. 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 process, this kind of reservoirs, which were not paid much attention before, are getting more and more attention from the field of oilfield exploration and development. 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. It has important theoretical significance and production value to study the method of improving the resolution of this kind of oil and gas reservoirs. Therefore, we invented a new ...

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Application Information

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Patent Type & Authority Patents(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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