Method for shot deviation in seismic prospecting and method for positioning correct shot position

A technology of seismic exploration and detection method, which can be applied to locate the correct shot position in seismic exploration, and the field of shot offset detection in seismic exploration, can solve the problems of long time consumption and difficulty in ensuring accuracy, and achieve the effect of wide application prospect.

Active Publication Date: 2017-01-04
BC P INC CHINA NAT PETROLEUM CORP +1
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However, the traditional shot offset detection method tak

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  • Method for shot deviation in seismic prospecting and method for positioning correct shot position
  • Method for shot deviation in seismic prospecting and method for positioning correct shot position
  • Method for shot deviation in seismic prospecting and method for positioning correct shot position

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[0016] Hereinafter, the method for detecting shot offset in seismic exploration and the method for locating the correct excitation position in seismic exploration of the present invention will be described in detail with reference to the exemplary embodiments.

[0017] figure 1 A schematic flowchart of an exemplary embodiment of the method for detecting shot deflection in seismic exploration of the present invention is shown. figure 2 A schematic flowchart of an exemplary embodiment of the method for locating the correct excitation position in seismic exploration of the present invention is shown. image 3 Schematic diagram showing the layout of shot locations and array slices of a certain seismic data. Figure 4 A schematic diagram of the offset-first arrival time relationship corresponding to a shot point is shown. Figure 5 A schematic diagram showing the offset-first arrival time relationship for another shot.

[0018] In an exemplary embodiment of the present inventio...

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Abstract

The invention provides a method for shot deviation in seismic prospecting and method for the positioning correct shot position. The method for shot deviation includes picking up the first-arrival time of the single-shot data; constructing the corresponding offset distance-first arrival time relation for each shot point in the serial shot point including the shot point and the receiver point position relation data; finding out the optimal target offset distance-first arrival time relation for the condition that the first-arrival time is gradually increased along the increasing of the offset distance; comparing the shot point corresponding to the target offset distance-first arrival time relation with the shot pint recorded in the trace header of the single-shot data, if the coordinate positions of the shot points are not consistent, determining that the shot detection relation of the shot is incorrect (namely, deviated), and meanwhile, taking the shot point corresponding to the target offset distance-first arrival time relation as a correct shooting position. According to the invention, the shot deviation of the single-shot record can be rapidly and accurately detected; and meanwhile, the correct shooting position can be pointed out, and the need of field single-shot onsite quality control can be met.

Description

technical field [0001] The invention relates to the technical field of data acquisition for oil and gas seismic exploration, specifically, the invention relates to a method for detecting shot deviation in seismic exploration and a method for locating the correct shot position in seismic exploration. Background technique [0002] Usually, shot detection relationship error, also known as shot deviation, refers to the phenomenon that shot point excitation position is wrong in petroleum seismic exploration, which will cause confusion of reception relationship, and seriously affect the quality of single shot and subsequent processing work. [0003] For this reason, it is particularly important to find the shot deviation and locate the correct point position in real time at the first scene of acquisition. However, traditional shot offset detection methods are time-consuming and difficult to guarantee accuracy. Contents of the invention [0004] The purpose of the present invent...

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Application Information

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IPC IPC(8): G01V1/30
CPCG01V1/30
Inventor 耿春李亚林敬龙江罗文黄卫华何光明巫骏
Owner BC P INC CHINA NAT PETROLEUM CORP
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