Portable small ocean bottom seismograph

A seismograph and portable technology, applied in the field of high-density seismic acquisition, can solve the problems that have not yet been reported on the application of 13-inch pod ball OBS, and achieve the effects of reducing additional tremors, reducing workload, and simple operation

Inactive Publication Date: 2012-04-25
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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  • Portable small ocean bottom seismograph
  • Portable small ocean bottom seismograph
  • Portable small ocean bottom seismograph

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Embodiment Construction

[0029] The innovation of the portable small-sized submarine seismograph of the present invention is mainly reflected in the following aspects:

[0030] (1) The 13-inch pressure-resistant glass cabin ball is adopted, which has the advantages of small size, low cost and easy operation compared with the 17-inch cabin ball used by the inventor in the past, and is suitable for the development of high-density OBS data acquisition technology. At present There is no similar small-scale OBS in China. This small-scale OBS is of great significance for studying the fine geological structure in the crust, reducing the difficulty of offshore construction, and high-density OBS data acquisition technology.

[0031] Submarine instruments are significantly different from ordinary onshore instruments and daily electrical appliances. The reduced size and weight of the submarine seismograph can speed up the progress of offshore operations and improve the efficiency of offshore operations. The oil ...

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Abstract

The invention discloses a portable small ocean bottom seismograph. The seismograph comprises: a plastic apparatus capsule, an electric corrosion releasing mechanism and a sink coupling frame. An acoustic pressure sensor is arranged on a top of a glass cabin ball. An all-attitude high frequency detector, an acoustic communication module, a wireless beacon machine, a GPS, an electronic compass and a power supply is arranged in the glass cabin ball. The sink coupling frame is a pedestal. By using a bonding mode of the all-attitude high frequency detector, an internal space can be greatly saved. An attitude adjustment operation of an internal seismometer can be simplified. Single point connection under the ball is used as a decoupling way so that installation is easy and a structure is stableand reliable. A diameter of the glass cabin ball of the ocean bottom seismograph in the invention is 13 inches. A volume is small and weight is light. Cost is low. The internal structure is compact. An offshore construction is convenient. The apparatus possesses a high resonant frequency. A working frequency is 300Hz. The seismograph is suitable for fine seabed geology structure detection. The three-component high frequency detector and the acoustic pressure sensor can cooperate with various kinds of artificial seismic sources so as to carry out high-efficient and high-density seismic detection and geology investigations.

Description

technical field [0001] The invention relates to the technical field of high-density seismic acquisition, and is a portable small seabed seismograph. Background technique [0002] For complex geological structures and in order to improve the data quality of seismic exploration, the number of OBSs used in a single offshore survey in foreign countries is often more than 100 (Kodaira et al., 2000). The interval of OBS is within 500-1000 meters when the German GEOPRO company conducts offshore operations. The blasting density is about 50 meters. In order to study the fine geological structure in the crust, high-density OBS data acquisition technology has become the mainstream direction and development trend of submarine seismic observation. This puts strict requirements on the usability of OBS. For artificial seismic sources, the development of a portable small OBS with a 13-inch small pressure chamber ball as a container has become a key technical node in the development of hi...

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Application Information

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IPC IPC(8): G01V1/38G01V1/18G01V1/20
Inventor 游庆瑜郝天珧赵春蕾
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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