Deep-distant sea seismic wave excitation device and excitation method

Abstract

The invention discloses a deep-distant sea seismic wave excitation device and an excitation method. The deep-distant sea seismic wave excitation device comprises a cylindrical gas storage cavity, a cylindrical control cavity is connected to a closed end of the gas storage cavity, a bursting plate is connected to an open end of the gas storage cavity, a gas injection pipe is arranged on the closedend of the gas storage cavity, and an ignition device is arranged in the gas storage cavity; a controller, a monitoring device, a power supply device and an ignition machine are arranged in the control cavity, and the method for exciting seismic waves comprises the following steps of completing the assembly of the excitation device and injecting combustible gas and oxygen; lowering the device to the seabed; initiating the gas in the gas storage cavity to react through the ignition device so as to produce high-temperature and high-pressure gas, and enabling the bursting plate to break, therebyproducing the seismic wave. The deep-distant sea seismic wave excitation device disclosed by the invention provides an effective and high-energy and environment-friendly artificial seismic source canbe provided for the geophysical exploration at the seabed of the deep-distant sea area.

Description

technical field [0001] The invention relates to the technical field of geophysical exploration equipment, in particular to a deep-sea seismic wave excitation device, and also relates to a method for exciting seismic waves using the deep-sea seismic wave excitation device. Background technique [0002] Geophysical exploration refers to the detection of geological conditions such as stratum lithology and geological structure through the study and observation of changes in various geophysical fields. Geophysical exploration explores the medium structure, material composition, formation and evolution of the earth itself and near-earth space. Various natural phenomena and their changing laws related to it provide theories, methods and technologies for detecting the internal structure and structure of the earth, searching for energy, resources and environmental monitoring, and provide an important basis for disaster forecasting. [0003] The deep sea refers to the sea area with a ...

AI Technical Summary

Problems solved by technology

However, natural earthquakes are uncontrollable, and it is difficult to conduct accurate and effective observations; at the same time, the traditional airgun source has a small energy and can only be excited on the sea surface, with limited propagation distance, insufficient energy and resolution, and cannot be used for deep-sea and seabed earthquakes. Geophysical surveys provide effective seismic sources

In addition, when the source is ignited thousands of meters underwater, it is necessary to carry an ignition cable, but for thousands of meters of water depth, using cables is unreliable, mainly because the water pressure is high at thousands of meters of water depth, and the cable If it is lowered vertically to several thousand meters under the seabed, the cable itself may be broken due to its own weight. Therefore, a composite cable with a steel cable must be used, but its cost is very high and it is not convenient to use.

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