【摘要】 三维地震勘探是一种面积勘探方法，观测系统形式很多，常用的线束型三维观测系统，由于其排列片狭长，存在方位角分布不均匀的弊端。为了改善面元的方位角分布特性，笔者于 99年 8月提出了一种新型三维观测系统设计法，又称之为成组加密法宽方位三维观测系统设计方法。文中系统叙述了该方法的设计原理，并对其主要设计参数进行了理论分析。该设计方法在徐州张双楼煤矿三维地震勘探中首次投入使用，取得了很好的技术效果和显著的经济效益。更多还原

【Abstract】 3-D seismic prospecting is a kind of areal survey. There are many types of 3-D layout. Ordinary field 3-D layout which has been often used in 3-D seismic has a weakness of non-uniform azimuth in bins because its patch appears narrow and long rectangle. To improve the character of azimuth’s distribution,the authors advanced a new designing method named wide azimuth 3-D layout with infilling shots in August, 1999. In this paper, the authors expound the designing principle of the method and make theoretical analyses in detail to main designing parameters. This method was first used in the 3-D seismic exploration of Zhangshuanglou coal mine of Xuzhou in 1999, and have gained a very good technical results and remarkable economic profits.更多还原