Common source receiving system for seismic exploration tools and vsp logging tools

Abstract

The invention discloses a common source receiving system of a seismic prospecting instrument and a VSP logging instrument. The system comprises the seismic prospecting instrument, a modulator, an encoder, a first broadcasting station arranged at the position where the seismic prospecting instrument is located, a second first broadcasting station arranged at the position where a shotpoint excitation device is located, a decoder, the shotpoint excitation device, a surface geophone, a VSP borehole geophone, a third broadcasting station and the VSP logging instrument, wherein the surface geophone and the VSP borehole geophone are arranged at receiving points, and the third broadcasting station is arranged at the position where the VSP logging instrument is located. The precise and synchronous relation among the seismic prospecting instrument, the VSP logging instrument and the excitation point is ensured through the modulator, the encoder, the decoder, the demodulator and radio stations connected between the modulator, the encoder, the decoder and the demodulator, two-dimensional and three-dimensional seismic exploration and VSP logging working are synchronously carried out, the shotpoint focus is shared, repeated excitation of the same excitation points in the same working area by the seismic exploration and the VSP logging is avoided, and the excitation workloads are saved by two times.

Description

technical field [0001] The invention relates to two exploration methods of seismic exploration and VSP well logging, same-source sharing and system synchronization. Specifically: the seismic waves excited by the seismic exploration that will be carried out separately in oil exploration, the reflected waves from the formation received by the 400 series seismic instruments, and the direct waves received by the VSP logging instrument, use the same excitation source, and the two sets of instruments simultaneously complete the seismic Reflected wave and logging direct wave reception work, complete the common source synchronous reception of seismic exploration instrument and VSP logging instrument. Background technique [0002] Petroleum exploration is accomplished by multi-disciplinary, wide-ranging technical areas and independent majors. Seismic exploration and VSP logging are different fields of geophysical exploration. The purpose is to find out the underground geological st...

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Problems solved by technology

[0005] The purpose of the present invention is to aim at the construction method of repeated blasting and repeated laying and receiving in conventional seismic exploration and VSP logging, which is time-consuming, labor-intensive, low in efficiency and high in cost, and cannot ensure that the two sets of instruments are consistent with the excitation and acquisition data. It is not conducive to the correct judgment of the operation results and the correct judgment of the target layer, and the existing synchronization accuracy cannot be guaranteed, which is not conducive to high-quality seismic data acquisition. A flexible, convenient and accurate Synchronous seismic exploration tool and VSP logging tool common source receiving system

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