复杂地区观测系统分析评价的照明度函数设计

Illumination analysis function design of complex areas geometry

在复杂构造地区进行照明度分析,对观测系统的优化设计有着重要意义.人们对如何进行正演照明做了大量的研究工作,但是如何利用照明结果进行观测系统的优化设计并没有一个统一的标准.为了使照明度分析有一定的规范,通过文字和图形定义了炮点入射照明、检波点接收照明、共反射点面元入射照明、共反射点面元成像照明和炮点-共反射点面元-检波点照明等五种照明度分析函数.通过这五种照明度分析函数就可以完成观测系统的评价及优化设计等工作.可以通过某个观测系统下,照明度函数能量的均匀性来判断一个观测系统的优劣.其中炮点-共反射点面元-检波点照明函数是其他一切照明度分析函数的基本子集.

Seismic illumination is a powerful tool to study the seismic energy propagations in complex structures, which can be applied to design seismic acquisition geometry and assess the quality of migration sections. Experts have done a lot of research work on how to lighting, but there is no standard for how to use light energy observation system optimization design. In order to make the illumination analysis has certain standard, In this paper, we summarize five illumination functions including shot point incident illumination function, geophone point receiving illumination function, underground bin incident illumination function, underground bin imaging illumination function, and shot-CRS-receiver illumination function with considering shot, receiver and target area, to investigate the influence of shadow area of illumination on seismic migration. Make use of these illumination functions, it can be effectively finished to evaluation and optimization design of seismic acquisition geometry. Then the main method is to analyze uniformity of anterior four illumination functions because shot-CRS-receiver illumination function is a basic subset of other four illumination functions.