Phase-Shift Signal Design for Simultaneous Sourcing in Vibroseis Survey
A. Tarasov, A. Shuvalov, V. Ignatev, A. Konkov, B. Kashtan and A. Oshkin
Event name: Marine Technologies 2019
Session: ИГ19: 09 Малоглубинная сейсморазведка с поверхности и во внутренних точках среды
Publication date: 22 April 2019
Info: Extended abstract, PDF ( 768.2Kb )
Price: € 20
The simultaneous source technique allows one to improve efficiency and quality of seismic acquisition. The principle of this method is to use several sources located at an arbitrary distance from the observation system and recorded simultaneously within the write cycle. Vibroseismic method, in contrast to the pulse method, allows separating data from several sources at the stage of correlative processing of vibrograms. To achieve this, it becomes necessary that signals from several sources have a low level of cross-correlation. For this purpose, so-called pseudorandom signals and pseudorandom sequences are used in many ways. In order to construct quasiorthogonal signals, we propose a method based on the solution of the optimization problem. The signals obtained by minimizing the goal function have a low level of cross-correlation and autocorrelation functions.