沙特沙漠区地震采集方法技术研究

Technology research of seismic acquisition on desert area in Saudi Arabia

沙特多为沙漠地形,地表多为沙丘、戈壁,近地表地质条件复杂,横向速度变化大,且面波、线性干扰、散射、绕射、沙丘引起的回响等干扰大。针对以上问题,通过对沙特几个项目施工进行采集技术研究和总结分析,从观测系统设计、可控震源参数优化和检波器组合优化来压制干扰提高信噪比,并就可控震源在沙漠地区高效采集前沿技术的发展进行了陈述。

Most terrain are desert in Saudi Arabia, and most of the surface are sand dunes and the gobi. Near surface complexgeological condition is very complicated, horizontal speed change is vast, and there are more interference waves includessurface wave, linear interference, scattering, diffraction, caused by sand dunes echoes of the interference, etc. Aimmingat these questions, technology research and analysis of seismic acquisition have been done on several projects. By geometry design, vibroseis parameters optimization and geophone strings combinatorial optimization, signal-to-noise isimproved and the noises are suppressed. The development of high efficient acquisition technology ofvibroseis in desertareas is described.