Method for constructing air gun array used in marine seismic exploration and air gun array
A marine seismic exploration and air gun technology, applied in the field of air gun arrays, can solve the problem of not providing an air gun setting method, etc., and achieve the effects of wide excitation effective frequency bandwidth, improved resolution, and strong source excitation energy
Active Publication Date: 2016-12-28
CHINA NAT OFFSHORE OIL CORP +2
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Problems solved by technology
Yet, the setting method of air gun in air gun array is not provided in the prior art
Therefore, for the problem of how to arrange the air guns to make the seismic source have better performance parameters under the condition of limited total capacity, there is no effective solution in the prior art
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[0021] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0022] Air gun array is the main equipment of marine seismic exploration, and its characteristics affect the effect of seismic exploration. In the following description, a single gun is a single air gun that is set on one of the multiple gun positions; a coherent gun is two air guns that are simultaneously set on one of the multiple gun positions; and standby The gun is an air gun installed at the position where the single air gun is installed and not used simultaneously with the single air gun.
[0023] figure 1 It is a flowchart of a method for constructing an air gun array used in marine seismic exploration according to the present invention. Such as figu...
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The invention discloses a method for building an air gun array used in offshore earthquake exploration. The air gun array comprises a gun frame and a plurality of air guns arranged at a plurality of gun arrangement positions of the gun frame. The method comprises the steps that the gun frame is divided into two symmetric portions symmetric about a row center line according to rows, the air guns are arranged on each symmetric portion in the mode of being symmetric about the row center line according to the volume of the air guns, the air guns arranged at the non-edge position of each symmetric portion are main air guns with the volume larger than that of the adjacent air guns, and the air guns arranged at at least one adjacent position of the main air guns are single guns. The large-volume air guns are arranged in the middle of each symmetric portion, more sufficient low-frequency ingredients can be obtained, the resolution ratio is improved, and then stronger focus excitation energy can be obtained as a whole.
Description
technical field [0001] The invention relates to the field of seismic exploration, in particular to a method for constructing an air gun array used in marine seismic exploration and the air gun array. Background technique [0002] Seismic prospecting is a means of surveying geological resources before drilling, and is widely used in mineral and engineering geological prospecting, regional geological research and crustal research. The principle of seismic exploration is to artificially excite seismic waves on the surface. When traveling underground, the seismic waves will be reflected and refracted when they encounter a rock layer interface with different medium properties, and the seismic waves will be received by receiving devices (such as geophones). The received seismic wave signal is related to the characteristics of the source, the location of the receiver point, and the nature and structure of the underground rock layer that the seismic wave passes through. By processi...
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IPC IPC(8): G01V1/387G01V1/133
Inventor 陈华张亚斌姚刚魏赟王征李欣何进勇张鹏
Owner CHINA NAT OFFSHORE OIL CORP