Excitation position determination method of three-dimensional seismic acquisition observation system

Abstract

The invention provides an excitation position determination method of a three-dimensional seismic acquisition observation system. The method comprises the following steps: exciting an target area and using a numerical simulation method of a three-dimensional elastic wave equation to calculate an illumination result of the target area; analyzing the illumination result so as to determine an excitation position and a receiving point corresponding to the excitation position, wherein an excitation source is added to the excitation position corresponding to an illumination shadow region if there is the illumination shadow region with an illumination which is lower than a predetermined value or with the non-uniform distributed illuminance. The method of the invention can help to design a goal-directed earthquake observation system so that field data quality and offset profile quality can be raised.

Description

technical field [0001] The invention relates to the technical field of seismic exploration field acquisition, and more particularly, to a method for determining the excitation position of a seismic acquisition observation system based on three-dimensional elastic wave and illumination analysis used in seismic exploration. Background technique [0002] The field acquisition of seismic data is the basis of geophysical exploration, and its quality directly affects the final exploration effect. Usually, after determining the exploration task and collecting the basic data of the exploration area, the design of the seismic acquisition and observation system needs to be carried out. The two main core issues in the design of the 3D seismic acquisition and observation system are: improving the quality of the acquired signal (with resolution and amplitude fidelity as the judging criteria), and at the same time effectively attenuating various noises. In order to achieve the above goal...

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Problems solved by technology

As oil exploration is shifting to complex areas such as the deep sea, basin margins, and piedmont zones, and the main geological problems faced by exploration in old areas (for example, old problems such as fault development, complex structures, and thin reservoirs) have not been well resolved. Therefore, the 3D seismic data acquired by an unreasonably designed field acquisition and observation system will make the subsequent seismic data processing and interpretation work face many difficulties

[0018] For example, after processing the seismic data, the section waves and side waves still cannot be correctly homing. In addition, the trap area is small, the seismic reflection wave quality is poor, and it is difficult to confirm small fault blocks and structures. The data cannot meet the needs of actual production

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