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Amplitude compensation method and device for seismic data processing under condition of true ground surface

A seismic data and amplitude compensation technology, applied in the field of seismic exploration, can solve the problems of inability to do time-varying processing, excessive low-frequency compensation, unable to meet the needs of seismic data amplitude preservation processing, etc., and achieve the goal of improving fidelity and imaging quality. Effect

Active Publication Date: 2011-06-29
恒泰艾普集团股份有限公司
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  • Application Information

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Problems solved by technology

[0008] The second method, using the principle of surface consistency, uses a factor compensation for the entire data trace, which can effectively compensate the energy change caused by the change of offset distance, but it cannot do time-varying processing, it only compensates for the entire trace The amplitude consistency is compensated, because the low-frequency compensation is too heavy, and the high-frequency compensation is insufficient, correspondingly suppressing the amplitude energy of the high-frequency component
[0009] Theoretical foundations of these methods all have certain assumptions, including surface consistency assumptions and vertical emission assumptions, etc., and technical limitations cannot meet the needs of amplitude-preserving processing of seismic data in areas with complex surface and subsurface geological structures.

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  • Amplitude compensation method and device for seismic data processing under condition of true ground surface
  • Amplitude compensation method and device for seismic data processing under condition of true ground surface

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Embodiment 1

[0047] In order to effectively compensate for the energy loss caused by the exit angle in areas that do not satisfy the surface consistency and vertical exit assumptions in the amplitude maintenance of seismic data, and improve the amplitude fidelity and imaging quality of seismic data processing, the embodiment of the present invention provides a seismic data processing Amplitude compensation method under true surface conditions, see figure 1 , the method includes:

[0048] 101: Obtain seismic data under real surface conditions;

[0049] 102: Calculate the outgoing angle of the receiver point according to the acquired seismic data;

[0050] 103: Compensate the received energy according to the outgoing angle and the received energy at the detection point;

[0051] 104: Calculate and obtain a zero-offset time profile according to the compensated received energy and imaging time information.

[0052] The received energy after compensation is calculated by the emission angle a...

Embodiment 2

[0054] In order to effectively compensate for the energy loss caused by the exit angle in areas that do not meet the surface consistency and vertical exit assumptions in the amplitude maintenance of seismic data, and improve the amplitude fidelity and imaging quality of seismic data processing, the embodiment of the present invention provides a seismic data Dealing with the amplitude compensation method under true surface conditions, this method is based on the above-mentioned ellipse expansion imaging theory under true surface conditions and the parameter expansion imaging theory under true surface conditions, since the compensation implementation methods in the two imaging theories are the same , the former is taken here as an example, see figure 2 , the method includes:

[0055] Step 201: collecting seismic raw data;

[0056] In the field of seismic exploration, the acquisition of the original seismic data is mainly to use seismic exploration equipment to artificially excit...

Embodiment 3

[0083] In order to effectively compensate for the energy loss caused by the exit angle in areas that do not meet the surface consistency and vertical exit assumptions in the amplitude maintenance of seismic data, and improve the amplitude fidelity and imaging quality of seismic data processing, the embodiment of the present invention provides a seismic data Amplitude compensation devices dealing with true surface conditions, see Figure 4 , the device consists of:

[0084] A seismic data acquisition module 401, configured to acquire seismic data under true surface conditions;

[0085] The first calculation module 402 is used to calculate the outgoing angle of the receiver point according to the acquired seismic data;

[0086] An energy compensation module 403, configured to compensate the received energy according to the outgoing angle and the received energy at the detection point;

[0087] The second calculation module 404 is configured to calculate a zero-offset time prof...

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Abstract

The invention discloses an amplitude compensation method and device for seismic data processing under condition of true ground surface, belonging to the technical field of seismic prospecting. The method comprises the following steps of: acquiring seismic data under the condition of true ground surface; computing to obtain an emergence angle of a demodulating point according to the acquired seismic data; compensating the received energy according to the emergence angle and the received energy at the demodulating point; and computing to obtain a zero offset distance time section according to the compensated received energy and imaging time information. The device comprises a seismic data acquisition module, a first computing module, an energy compensation module and a second computing module.

Description

technical field [0001] The invention relates to the field of seismic exploration, in particular to an amplitude compensation method and device for seismic data processing under real surface conditions. Background technique [0002] The amplitude information of seismic data is an important parameter in seismic data processing and interpretation. The fidelity of the amplitude directly affects the quantitative analysis of reservoir lithology and the interpretation of geological phenomena, such as reservoir research, horizon calibration, bright spot display, etc. There are many factors affecting the amplitude maintenance of seismic data, among which the acquisition and processing process have the most direct and extensive influence on the amplitude. In the conventional seismic data acquisition and processing, because the actual formation medium is not an ideal complete elastic medium in the process of seismic wave excitation, propagation and reception, but complex changes, the ...

Claims

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Application Information

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IPC IPC(8): G01V1/36
Inventor 谢桂生康德拉什科夫孙庚文林依华周青春
Owner 恒泰艾普集团股份有限公司