摘要
基于深水崎岖海底地区的地震剖面建立崎岖海底地层地震地质模型;基于射线正演模拟及地震波在弹性分界面上的能量分配,分析研究崎岖海底影响下的下伏地层反射界面上的地震波运动学和动力学特征以及对崎岖海底对下伏地层成像精度的影响,分析结果表明,崎岖海底对下伏地层的反射覆盖次数、反射能量以及入射角范围有很大的影响,导致波的动力学特征发生明显变化,尤其海上长排列加剧振幅的横向变化,指出在复杂崎岖海底地区地震勘探必须选择合适的排列长度和覆盖次数才能确保保幅成像处理。
The seismic--geology model is built based on the real model of rough deep sea bottom obtained from the seismic interpretation in this paper. Based on the theory of ray forward modeling and the energy distribution of seismic in the elastic interface, the seismic kinematic and dynamic characters of rough deep sea bottom and the effect on imaging preci- sion of rough deep sea bottom were analyzed. The results show that because of rough deep sea bottom, the fold number, reflected energy and incident angles on the reflection of the layer lateral vary largely , so is the significant change of dynamic features of seismic wave, especially lateral amplitude change due to long array. The work indicates that in complicated rough deep sea bottom area proper array length and fold number are critical for amplitude- preserved image processing.
出处
《工程地球物理学报》
2010年第1期1-6,共6页
Chinese Journal of Engineering Geophysics
基金
国家重大科技专项:莺琼盆地高温高压区高精度地震资料采集处理技术研究(编号:2008ZX05000-023-04)资助
