组合接收和激发采集技术中的组合中心研究

Array center of a receiver or shot array

针对地震数据采集施工设计中的接收和激发组合中心的确定问题,阐述了自己的观点。指出现在施工设计中,组合参数的确定主要围绕干扰波、频率特性和方位角等方面进行论证,忽视了其组合中心的确定。普遍存在把图形中心当作组合中心的错误做法,认为根据不同的组合图形应具体确定其组合中心。提出了关于组合中心确定的重心原则,即把单个检波器的权值视为单位质量,由此确定其组合图形的重心应为实际的组合中心。从而指导设计人员和质量监控人员更为准确地把好生产质量第一关。

This paper discusses the determination of array center of a receiver or shot array in acquisition design.In current practice,array parameters are usually calculated according to the strength and types of interference wave,frequency characteristics,and azimuth,whereas the effect of array center is often ignored,and simply view the graphic center as array center.The author proposes a criterion for determination of array center.If the weight at each receiver is set to unit mass,the center of gravity of an array is the actual array center.This method is easy to use for designers and supervisors to control the quality of acquisition at the beginning of design and acquisition.