崎岖海底下伏地层的地震波照明分析  

Seismic Wave Illumination Analysis in the Work Area with Rough Seabed

作　　者：汪勇[1,2] 顾汉明[1] 范宝仓 

机构地区：[1]中国地质大学(武汉)地球物理与空间信息学院,湖北武汉430074 [2]长江大学地球物理与石油资源学院,湖北荆州434023 [3]中海油服物探事业部数据处理中心,天津300451

出　　处：《石油天然气学报》2011年第7期58-62,4,共5页Journal of Oil and Gas Technology

基　　金：国家"十一五"科技重大专项(2008ZX050000230401)

摘　　要：通过地震波照明分析可以准确地认识和研究地震波能量在地下的分布,所以基于目标模型的射线追踪地震波照明分析,可快速准确地识别工区内地震波的能量分布特征,同时可以指导实际观测系统设计及提高工区地震成像质量。由于崎岖海底会导致地震波在传播时的射线偏折,增加了地震采集和处理的难度,所以建立了一个针对中国南海某工区的三维地震地质模型,并基于三维射线追踪原理对目标层进行照明分析,找出影响该工区地震成像效果的原因,从而指导观测系统的设计和优化。通过面向目标的照明分析可以找到最佳的加密激发点位置,从而得到更好的采集质量。Seismic illumination analysis could accurately understand and study the distribution of seismic wave energy in the ground,so the target-based model of ray tracing seismic illumination analysis could be quickly and accurately identify the seismic energy distribution in the work area,and could also be used to guide the design of observing system and improve seismic imaging quality in the work area.The rough sea bottom would cause the ray deflection in the seismic wave propagation,it increased the difficulty of seismic data acquisition and processing.Therefore a three-dimensional seismic geological model was established for a work area in South China Sea,and based on principles of three dimensional ray tracing target zone,its illumination was analyzed to identify the effect of the work area of finding the causes of influencing the seismic imaging to guide the design and optimization of observing systems.The result shows that the goal-oriented analysis can be excited to find the best position of encryption for obtaining better capture quality.

关 键 词：地震波照明分析 射线追踪 打击次数 观测系统 

分 类 号：P631.44[天文地球—地质矿产勘探]