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Acquisition Method of Seismic Data Stacking Weight by Stage and Method of Stacking by Stage

A technology of seismic data and acquisition method, applied in seismology, seismic signal processing, geophysical measurement, etc., can solve the problems of ignoring the difference of weights, inaccurate final stacking results, etc., and achieve the effect of accurate stacking results and simple steps

Active Publication Date: 2017-11-14
BGP OF CHINA NAT GASOLINEEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the process of realizing the present invention, the inventors found that there are at least the following problems in the prior art: the existing seismic data stacking method in stages only performs simple summing and averaging on the stacking results of each stage, ignoring each The weight difference of the superposition results of the stage when participating in the final superposition, the resulting final superposition result is inaccurate

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  • Acquisition Method of Seismic Data Stacking Weight by Stage and Method of Stacking by Stage
  • Acquisition Method of Seismic Data Stacking Weight by Stage and Method of Stacking by Stage
  • Acquisition Method of Seismic Data Stacking Weight by Stage and Method of Stacking by Stage

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Embodiment 1

[0051] This embodiment provides a method for acquiring seismic data stacking weights in stages, see figure 1 , the method for obtaining superposition weights includes the following steps:

[0052] Step 101, when the seismic data is stacked in stages, set the data channel value corresponding to the sampling time with effective sampling points in the excised pre-stack data of each stage to 1, and set the sampling time corresponding to the sampling time without valid sampling points in the excised pre-stack data The data channel value corresponding to the time is set to 0;

[0053]In step 102, the data trace values ​​corresponding to the same sampling time in each data trace in each stage are summed up, and the summation result obtained is the stacking weight for final stacking using the seismic data stacking result of this stage.

[0054] In the process of seismic data processing, the data is usually cut off to get reasonable results by cutting off unnecessary data. After the ...

Embodiment 2

[0056] This embodiment provides a method for acquiring seismic data stacking weights in stages, through simple steps, the stacking weights that can reflect the weight difference of the stacking results of each stage when they participate in the final stacking can be obtained. see figure 2 , the method for obtaining superposition weights includes the following steps:

[0057] Step 201 , acquiring pre-stack data before excising at each stage when seismic data is stacked in stages.

[0058] Since the pre-stack data before resection will be processed in subsequent steps, in order to retain the pre-stack data before resection, a copy of the pre-stack data before resection may be obtained.

[0059] In step 202, set the data channel values ​​corresponding to all sampling times in the pre-stack data before cutting to 1.

[0060] In order to facilitate the subsequent cutting and superimposing steps, when the data channel value is set to 1, the header information of each data channel...

Embodiment 3

[0069] This embodiment provides a method for stacking seismic data in stages, see Figure 4 , the overlay method consists of:

[0070] Step 301, respectively superimposing the pre-stack data after excision in each stage to obtain the superposition results of each stage;

[0071] Step 302, set the data channel value corresponding to the sampling time with effective sampling points in the pre-stack data after excision to 1, and set the data channel value corresponding to the sampling time without effective sampling points in the pre-stack data after excision set to 0;

[0072] Step 303, adding the data track values ​​corresponding to the same sampling time in each data track obtained in step 302;

[0073] In step 304, the summed result obtained in step 303 is used as the superposition weight, and the weighted average of the superposition results of each stage obtained in step 301 is calculated as the final superposition result.

[0074] In the stage-by-stage superposition met...

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Abstract

The invention discloses a method for acquiring staged superposition weights of seismic data and a method for staged superposition, which belong to the technical field of seismic data processing. The method for acquiring the superposition weights comprises that at the step a, a data track value corresponding to sampling time in which an effective sampling point exists in pre-stack data after removal processing at each stage during the staged superposition of the seismic data is set to be 1, and a data track value corresponding to sampling time in which no effective sampling point exists in the pre-stack data after the removal processing is set to be 0; and at the step b, the data track values corresponding to the same sampling time in each data track at each stage is counted up, and the obtained sum is the superposition weight during final superposition which is realized by the superposition result of the seismic data at the stage. The method for acquiring the superposition weights has the simple steps and does not form extra database documents or assistant documents. The superposition weight can reflect a weight difference shown when the superposition result at each stage participates in the final superposition, so that the final superposition result is more accurate.

Description

technical field [0001] The invention relates to the technical field of seismic data processing, in particular to a method for acquiring seismic data stacking weights in stages and a stacking method in stages. Background technique [0002] Stacking is an important step in seismic data processing. It is to add the pre-stack data of the same sampling time in different data channels, and finally combine multiple data channels into one data channel, thereby improving the signal-to-noise ratio. In some specific cases, such as for the purpose of quality control or to save the amount of calculation in the process of seismic acquisition, when the data has not yet reached full coverage, it is required to stack the part of the data that has been obtained. The result of stacking this part of data is in Stacking with subsequent seismic data, this stacking method is called staged stacking. [0003] The current stage-by-stage stacking method is as follows: firstly add up the pre-stack dat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/32
CPCG01V1/32G01V2210/50
Inventor 昌松全海燕罗敏学韦秀波董凤树徐朝红景月红
Owner BGP OF CHINA NAT GASOLINEEUM CORP