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Prestack seismic data imaging method

A pre-stack seismic and imaging technology, applied in the field of seismic exploration data processing, can solve the problems of large amount of calculation, large amount of intermediate data, long time consumption, etc., and achieve the effect of reducing the amount of calculation and improving efficiency.

Active Publication Date: 2015-08-19
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0006] An exemplary embodiment of the present invention is to provide a method for pre-stack seismic data imaging, which can overcome the defects of large calculation, long time consumption and large amount of intermediate data in the existing method

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Embodiment Construction

[0020] Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are shown in the accompanying drawings, in which the same reference numerals always refer to the same components. The exemplary embodiments will be described below in order to explain the present invention by referring to the drawings.

[0021] figure 2 A flowchart of a method for pre-stack seismic data imaging according to an exemplary embodiment of the present invention is shown.

[0022] Reference figure 2 In step S10, the calculation area of ​​each target line in the area to be imaged is determined according to the maximum offset. The target line is generally an Inline line, and those skilled in the art can understand that the target line may also be an Xline line. The maximum offset is the maximum offset. Here, the calculation area of ​​the any target line refers to the area where the calculation needs to be performed for imaging the any target line. That...

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Abstract

The invention provides a prestack seismic data imaging method, which comprises steps: (a) according to the maximal offset distance, a calculation region of each target line in a to-be-imaged region is determined, wherein the calculation region of any target line presents the region of a travel time which needs to be calculated for imaging of any target line; (b) the travel time of each grid in the calculation region of each target line is determined; (c) according to all determined travel times, depth offset is carried out on the prestack seismic data of the to-be-imaged region so as to obtain seismic data after depth offset; and (d) according to the obtained seismic data after depth offset, a geological image of the to-be-imaged region is generated. According to the prestack seismic data imaging method of the embodiment of the invention, travel times in the calculation region of determined target lines only need to be calculated and stored, the travel times of the entire speed region do not need to be calculated, the calculation amount, consumed time and middle data amount can be reduced, and the efficiency is improved.

Description

Technical field [0001] The present invention generally relates to the technical field of seismic exploration data processing, and more specifically, to a method for pre-stack seismic data imaging. Background technique [0002] With the deepening of exploration and development, the exploration targets are getting smaller and smaller, and the exploration targets are developing in the direction of middle and deep complex fault-block reservoirs, hidden reservoirs and buried hill reservoirs, and the requirements for underground structure imaging are more refined. In view of the rapid development of seismic acquisition equipment in recent years, the belt capacity of acquisition instruments has been significantly enhanced, coupled with the development of high-density and wide-azimuth acquisition technology, the amount of pre-stack seismic data has increased sharply. For example, the high-density seismic data in a 150km 2 work area has a pre-stack data volume of 2TB. Pre-stack depth mig...

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Application Information

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IPC IPC(8): G01V1/28
Inventor 张恩嘉金德刚刘鸿唐虎段鹏飞陈三平何光明熊晶璇巫骏陈立
Owner BC P INC CHINA NAT PETROLEUM CORP
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