Electric spark vibration source excitation method and vibration source setting method

Abstract

The application provides an electric spark vibration source excitation method and a vibration source setting method. The method comprises the following steps: geological data of an object exploration area is obtained, an optimal excitation depth is determined according to a geological data analysis result, drilling operation is conducted in the object exploration area, depth of a drilling well is not less than the optimal excitation depth, an electrode gun head of an electric spark vibration source is plugged into a position of the optimal excitation depth in the drilling well, water liquid of a specified content is injected, an electric spark vibration source excitation well is formed and then excited, and artificial seismic waves are picked. According to all embodiments of the electric spark vibration source excitation method and the vibration source setting method, large vibration energy can be obtained via vibration source excitation, environment requirements for seismic exploration construction can be satisfied, seismic exploration requirements for energy intensity during electric spark vibration source excitation processes can be satisfied, a signal to noise ratio of seismic data can be provided, damage caused to an earth surface can be effectively reduced, the electric spark vibration source excitation method and the vibration source setting method can be well applied to marsh and transition belt zones, and exploration and construction problems of those zones can be effectively solved.

Description

technical field [0001] The application belongs to the technical field of geophysical exploration in swamp and tidal flat transition zones, and in particular relates to an electric spark seismic source excitation method and a seismic source setting method. Background technique [0002] In the seismic exploration and acquisition operations in the shallow sea transition zone, explosive source is usually used for construction exploration in the swamp and tidal flat transition zone. With the enhancement of people's awareness of environmental protection and the severe security situation, the use of explosives as seismic exploration sources has been banned in most countries and regions around the world, especially in nature reserves, wetlands, swamps, tidal flats and other environments. At present, the non-explosive source for exploration in this area can choose air gun source and electric spark source. [0003] The spark source is a kind of electric energy source. It uses a capa...

AI Technical Summary

Problems solved by technology

However, the excitation effect of the electric spark source is greatly affected by the excitation environment. When the source is excited in the shallow sea transition zone such as wetlands and swamps, it often cannot meet the operation requirements.

Therefore, the energy released by this mode of operation in the shallow-sea transition zone is small, and often cannot meet the vibration intensity required by the geological data of deeper formations.

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