Determination method and device for seismic data acqusition system

Abstract

The embodiment of the invention discloses a determination method and device for a seismic data acqusition system. The method comprises the following steps: acquiring geophysical physical data of different burial depths of an exploration region target stratum; determining dispersion of the target stratum according to the geophysical physical data; determining a base line of the seismic data acqusition system based on theoretical two-dimensional seismic line data in the geophysical physical data and determining an actual line range according to a preset rule; performing earth surface situation analysis on the geophysical physical data in the actual line range, and determining a bent line of the seismic data acqusition system according to a second preset rule based on an earth surface situation analysis result and a line range; determining shot and positioning point coordinates on the bent line of the seismic data acqusition system; forming the seismic data acqusition system according to a base line and the bent line of a shot and positioning point. According to the determination method and device for the seismic data acqusition system provided by the embodiment of the invention, the requirement on seismic data acqusition at an earth surface region of a complex mountain terrain can be met.

Description

technical field [0001] The present application relates to the technical field of seismic exploration, in particular to a method and device for determining a seismic data acquisition system. Background technique [0002] Seismic exploration refers to a geophysical exploration method that uses the difference in elasticity and density of underground media to infer the nature and shape of underground rock formations by observing and analyzing the response of the earth to artificially excited seismic waves. Seismic prospecting is an important means of surveying oil and natural gas resources before drilling, and it is also widely used in coal field and engineering geological exploration, regional geological research and crustal research. [0003] Using the seismic observation system, technicians can collect seismic exploration data. The seismic observation system generally includes the excitation point of the seismic wave (ie, the shot point), the receiving point of the seismic w...

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Problems solved by technology

[0004] In the complex mountainous surface area, for example, the carbonate rock exposed mountain area is commonly known as the karst landform area. Due to the severe surface undulation, the exposed lithology and lithology of the surface layer change rapidly and changeable, the vertical and horizontal velocity and thickness of the surface layer vary greatly, and the structure is extremely different. The stability seriously affects the validity of the collected seismic data. Therefore, it is impossible to obtain ideal seismic data by using the conventional seismic data collection system.

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