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Original waveform extraction and imaging method

A waveform extraction and imaging method technology, applied in seismic signal processing and other directions, to achieve the effect of improving time resolution, avoiding stretching, and protecting basic features

Active Publication Date: 2017-03-22
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

The transformation effect of seismic processing can cover up or even obliterate the change effect of formation lithology, and the reliability of basic data has become a bottleneck restricting the improvement of lithology exploration accuracy

Method used

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  • Original waveform extraction and imaging method

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Embodiment Construction

[0046] In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are listed below, accompanied by illustrations, and described in detail as follows.

[0047] Such as figure 1 as shown, figure 1 It is a flow chart of the original waveform extraction and imaging method of the present invention.

[0048] Step 101, according to the spatial geometric distribution and velocity information of the target layer, calculate the occurrence parameters of the formation, including depth, dip, dip and XY coordinates, each point on the layer is used as a reflection point, and the ray leaves the reflection formation along the normal direction , the intersection point of its extension line and the ground is the exit point, so as to establish the mapping relationship between the formation reflection point and the ground exit point. Combined with the diagram, the process is as follows:

[0049] (1) Perform spatial i...

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Abstract

The invention provides a seismic original waveform extraction and imaging method. The method includes the following three steps: 1. establishing a mapping relation between stratum reflecting points and ground emergent points; 2. establishing an index relation between target horizon reflecting points and seismic channels; and 3. picking up a reflection waveform. The seismic original waveform extraction and imaging method directly tracks and extracts an original waveform of a target horizon according to physical laws and a field observation system, can effectively solve the problems of offset waveform stretching, amplitude deviation of different offset and additional drifting of a stratum dip angle, avoid an effect of damage of a processing process to reflecting wave amplitude, maximally utilize kinematics and dynamics information of seismic waves, and provide true and reliable basic data for subsequent pre-stack attribute analysis and lithologic inversion.

Description

technical field [0001] The invention relates to the technical field of seismic data imaging, in particular to an original waveform extraction and imaging method in the amplitude-preserving processing method of seismic data. Background technique [0002] The current seismic processing technology and process can preserve the kinematic characteristics of reflected waves, which is beneficial to structural exploration, but may destroy the dynamic characteristics of reflected waves to a certain extent, which is not conducive to lithology exploration. In fact, almost every major processing step will modify the seismic waves in some form, and the accumulation of such modification effects will inevitably damage the original information of the resulting data. The transformation effect of seismic processing can cover up or even obliterate the change effect of formation lithology, and the reliability of basic data has become a bottleneck restricting the improvement of lithology explorat...

Claims

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Application Information

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IPC IPC(8): G01V1/28
CPCG01V1/28
Inventor 王有新张达汪浩葛大明孙朋朋
Owner CHINA PETROLEUM & CHEM CORP
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