A method and device for determining the maximum offset distance of a shot point in an exploration area
A technology of offset and shot point, which is applied in the field of determining the maximum offset of the shot point in the detection area, and can solve the problems of poor accuracy of the maximum offset, low calculation efficiency, and huge calculation amount
Active Publication Date: 2017-09-15
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
However, in the prior art, only the maximum offsets of some shot points in the detection area are determined, and the accuracy of the maximum offset of the detection area determined according to the maximum offsets of some shot points in the detection area is poor.
And to use the existing technology to calculate the maximum offset of all shot points in the detection area will lead to a huge amount of calculation, and the calculation efficiency is low
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[0063] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.
[0064] The specific implementation of the embodiment of the present application will be described in detail below with several specific examples.
[0065] The first embodiment of a method for determining the maximum offset of a shot point in a detection area of the present application will be firstly introduced below. figure 1 It is a flo...
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Embodiments of the present application provide a method and device for determining the maximum offset of a shot point in a detection area. The method includes: selecting a plurality of reference shot point seismic records to be processed according to the surface and target layer characteristic information of the exploration area; using the sampling points on the event corresponding to the effective wave and the first arrival wave in the seismic records to be processed to calculate the The effective wave velocity, self-excitation and self-recovery time, first-arrival wave velocity and crossing time of the reference shot point; respectively calculated according to the effective wave velocity, self-excitation and self-receiving time, first-arrival wave velocity and crossing time of the reference shot point The effective wave velocity, self-excited and self-receiving time, first-arrival velocity and crossing time of the shot point; calculated according to the effective wave velocity, self-excited and self-receiving time, first-arrival wave velocity and crossing time of the shot point in the detection area The maximum offset of the shot point. The technical solution provided by the embodiment of the present application can quickly and accurately determine the maximum offset of the shot point in the detection area, and provide support for obtaining high-quality seismic exploration field data.
Description
technical field [0001] The invention relates to the technical field of seismic exploration data processing, in particular to a method and a device for determining the maximum offset of a shot point in an exploration area. Background technique [0002] The quality of seismic data acquisition directly affects the accuracy of data processing in seismic exploration. The design and selection of the observation system is an important factor to improve the quality of seismic data acquisition, and the maximum offset is a very important parameter in the design of the observation system. In construction areas with complex structures and large differences in buried depth in the same layer, the maximum offset directly affects whether deep seismic signals can be received, and has a greater impact on whether geological tasks can be completed. [0003] The refracted wave interference design in the prior art is to select representative shots and select the effective wave and first arrival ...
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IPC IPC(8): G01V1/20G01V1/30
Inventor 邹雪峰许银坡潘英杰詹仕凡李伟波樊平
Owner BC P INC CHINA NAT PETROLEUM CORP