【摘要】 随着方位角的增大,宽方位地震资料的速度随方位角的变化、与倾角和方位相关的旅行时差、与方位相关的各向异性等问题也随之产生。当所采集的宽方位资料不是全方位时,如何根据资料的实际情况形成有利于后续处理和解释的分方位道集尤为重要。本文针对这些问题提出了相应的解决办法,包括运用分方位道集技术形成合理的方位道集;运用分方位速度分析技术精确求取叠加速度;运用与倾角方位角相关的旅行时校正技术进行倾角、方位角的旅行时校正;运用分方位各向异性偏移技术消除不同方位的各向异性影响等。对实际资料的处理效果表明,本文所述方法是切实可行的。更多还原

【Abstract】 Wide azimuth data acquisition leads a few problems in data processing,such as velocity variation with azimuth,azimuth-dependence travel time correction,azimuth-dependence anisotropy.For wide azimuth data(not full azimuth data),it is very crucial to form reasonable azimuth sectors which are favorable for processing and interpretation from real data.In this paper we propose a set of solutions including azimuth sector forming,azimuth accurate stack velocity estimation;azimuth-dependence travel time correction and azimuth anisotropic pre-stack migration.Improved results have been achieved with applications of these techniques,and show that our approaches are feasible.更多还原