Marine seismic data acquisition system and method

Abstract

The invention discloses a marine seismic data acquisition system and method. The marine seismic data acquisition system includes a first tugboat, a second tugboat, a submarine cable of which one end is connected with the second tugboat, a vibration source which is located on the first tug and is used for exciting seismic waves, a plurality of geophones which are arranged at different positions of the submarine cable and are used for detecting seismic wave reflection signals and outputting the detected seismic wave reflection signals, and a signal acquisition device which is located on the second tugboat and is connected with the plurality of geophones, and is used for receiving and storing the detected seismic wave reflection signals, wherein the submarine cable is located at the seabed, and the seismic waves excited by the vibration source are reflected by an seabed geological interface so as to form the seismic wave reflection signals. With the system and method of the invention adopted, deep exploration under complex seabed conditions such as Mesozoic and Paleozoic marine facies basins can be realized; and the geophones are located at the seabed, so that various kinds of interferences can be avoided, and therefore, high-quality seismic profile information under complex geological circumstances can be obtained so as to clearly reflect underground geological information.

Description

technical field [0001] The invention relates to the field of geological exploration, in particular to a marine seismic data acquisition system and a marine seismic data acquisition method. Background technique [0002] The existing offshore exploration is mainly concentrated in the Cenozoic basin, so conventional marine seismic data collection is mainly aimed at the technical sequence of this stratum, such as seismic source capacity, air gun array pressure, sinking depth, cable length, cable sinking depth and other seismic data Most of the acquisition parameters are designed for the exploration target layers in Cenozoic basins. For complex seismic geological conditions, such as the exploration of Mesozoic and Paleozoic marine basins, deep exploration under complex seabed conditions, and exploration under shallow strong shielding layers, the seismic profiles obtained by existing conventional seismic acquisition methods cannot be clearly obtained Effective underground reflect...

AI Technical Summary

Problems solved by technology

For complex seismic geological conditions, such as the exploration of Mesozoic and Paleozoic marine basins, deep exploration under complex seabed conditions, and exploration under shallow strong shielding layers, the seismic profiles obtained by existing conventional seismic acquisition methods cannot be clearly obtained Effective underground reflection information leads to poor imaging of underground geological structures, which seriously affects the exploration progress of marine resources such as oil and gas, solid minerals, etc.

With the development of marine resources exploration in the direction of Meso-Paleozoic old strata, middle-deep complex structures and lithological traps, conventional marine seismic acquisition can no longer meet the needs of production

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