Method and system for designing depth of seismic source excitation well

Abstract

The invention provides a method and system for designing the depth of a seismic source excitation well. The method includes the steps of S1, obtaining the maximum designed depth of the excitation well in an exploration region; S2, obtaining seismic data of the exploration region in a micro-logging mode; S3, extracting a set of seismic data in the seismic data according to a preset rule, and arranging the extracted seismic data according to the micro-logging excitation depth order to form an excitation seismic data record; S4, carrying out frequency spectrum analysis on the excitation seismic data record to obtain the frequency bandwidth of the excitation seismic data; S5, selecting the micro-logging well depth, meeting a preset amplitude, frequency bandwidth and adjacent channel waveform coincidence requirement, in the excitation seismic data record to serve as an optimal seismic source excitation segment. By means of the method and system, the reasonable seismic source excitation well depth can be obtained through design in a complex earth surface region, the seismic source excitation effect can be improved, and the signal to noise ratio of collected seismic data can be improved.

Description

technical field [0001] The application belongs to the technical field of petroleum seismic exploration, and in particular relates to a seismic source excitation well depth design method and system in complex surface exploration areas. Background technique [0002] Due to the non-renewable natural resources of underground oil and gas, the requirements for the exploration and exploitation of oil and gas resources in the world are becoming more and more refined. In the prior art, the method of seismic wave reflection is usually used to explore the distribution of oil and gas resources, the seismic source is used to excite the formation, the seismic wave data is received on the surface, and the underground structure and oil and gas resource distribution are analyzed according to the received data. [0003] When using seismic wave data to explore oil and gas resources, the source excitation position of seismic wave is particularly important. The excitation location of the seismi...

AI Technical Summary

Problems solved by technology

The design method based on layer velocity is difficult to complete the reasonable design of source excitation well depth

If a conventional fixed-depth excitation well is used for source excitation, the excitation effect will be significantly reduced due to the influence of complex surface and subsurface media, and the excitation energy may not be able to fully reach the target layer, resulting in a low signal-to-noise ratio of the collected seismic data. Seismic data processing and interpretation increase the difficulty

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