ATTITUDE CORRECTION OF MARINE DISTRIBUTED VERTICAL CABLE UTILIZING AVERAGE ACOUSTIC VELOCITY OF SEAWATER

The seismic acquisition method with vertical cable may acquire the reflection from the underground structure of the area with high signal-to-noise ratio, wide frequency band and wide azimuth angle, thereby realizing high-precision imaging of the target area. The accurate acquisition of the vertical cable attitude is a necessary prerequisite for the deconstruction of high quality seismic data. The common detection wave point gather is obtained by using the correlation matching method of first-break sampling point difference and the source excitation sampling point difference. According to the position parameters measured by the ultra-short baseline, the initial attitude model of the vertical cable is obtained. Combined with the estimated average acoustic velocity of seawater, the attitude of the vertical cable is corrected and the range of the tilt angle is determined to support the subsequent processing of the vertical cable seismic data.