Compressed air energy seismic source apparatus for seismic exploration in waters

Abstract

The invention discloses a compressed air energy seismic source apparatus for seismic exploration in waters. The apparatus includes a housing, a compressed air source, an impact cylinder, a flange, a stainless steel base plate, a cylinder bottom pad plate and a vibration plate. The housing is a vertically arranged hollow canister body. The impact cylinder is disposed inside the housing. The flange is horizontally and fixedly installed at the bottom part of the housing. The stainless steel base plate and the vibration plate are horizontally arranged. The stainless steel plate is an annular plate having a center hole. The stainless steel plate is arranged under the flange. The vibration plate is arranged under the stainless steel base plate. The flange, the stainless steel base plate ad the vibration plate are connected through external fastening bolts which vertically penetrates. The cylinder bottom pad plate is an annular plate which is arranged between the impact cylinder and the stainless steel plate and has a center hole. An internal fastening bolt vertically penetrates the stainless steel base plate and the cylinder bottom pad plate, and then is connected to the bottom part of the impact cylinder so as to fix the impact cylinder to the stainless steel base plate in a suspension manner. The apparatus can be used in seismic exploration in waters.

Description

technical field [0001] The invention relates to geophysical exploration equipment, in particular to a compressed air source device for seismic exploration in water areas. Background technique [0002] With the development of the national economy, a large number of bridges, tunnels, and wharfs have been built in waters at home and abroad. Due to complex geological conditions, geophysical exploration is required. [0003] Offshore oil exploration and exploitation drilling platforms and their surroundings also require marine engineering geological exploration, as well as geophysical exploration. Geophysical prospecting in water areas is usually dominated by seismic prospecting. [0004] At present, the seismic sources used in water area seismic exploration include air gun sources, electric spark sources, Boomer, and source ships. The air gun seismic source has high excitation energy and strong penetrating ability, but the equipment is bulky, expensive, troublesome to operate...

AI Technical Summary

Problems solved by technology

[0006] 1. The main component of the vibration source device is the air hammer. The air hammer has a small output force and low excitation energy, and cannot form an effective high-speed impact on the bottom plate of the device. Therefore, the obtained wavelet characteristics are poor, which has a negative impact on the exploration results. influences

[0007] 2. The structure used in the device to drive and control the hammer head to move up and down to hit the bottom plate is an air compressor, magnetic base plate, magnet and return spring. Controlling the up and down movement of the hammer head is difficult to achieve precise control, and it is difficult to ensure the reliability of the hammer head hitting the bottom plate

[0008] 3. The device is a boat-shaped hollow closed container. The specific gravity of the device is smaller than that of water, so it can only float on the water surface, and cannot enter the water for operation after a certain depth. The sinking depth cannot be adjusted and has no variability. The use needs to adjust the sinking depth, and vibrations of different main frequencies cannot be obtained, so the main frequency of the vibration wavelet cannot be matched, which greatly restricts the use of the device. It has limitations in the place of use and cannot fully meet the seismic exploration of water areas. requirements

[0009] 4. The vibrating plate used in this device is only made of metal material, and the material cannot be replaced, so it cannot generate vibration wavelets with different main frequencies, and cannot provide different penetration capabilities and resolution capabilities

[0010] 5. The device is packaged as a whole into a small boat, commonly known as the source boat, and the carrying body is made of metal, which is relatively heavy and expensive

[0017] At present, impact cylinders are generally used in mechanisms with sensitive reciprocating motion and little force, but have not yet appeared in the field of seismic exploration in water areas.

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