常规与面元细分三维观测系统浅析

目前，三维地震勘探已成为开发地震中提高整体效益的一种基本方法。常用的三维勘探方法有常规法和近年来国外推出的面元细分法。常规的三维勘探观测系统采用的是直线束型，其中心点位于面元中心。此法观测系统一经确定，覆盖次数随之而定，相应的信噪比和分辨率不能改变。面元细分法三维勘探观测系统采用了不同于常规三维观测系统的有关参数，可形成不同大小的面元，使共中心点在整个面元上均匀分布，可根据地质任务的要求，获取高叠

Preliminary analyses of conventional and bin-subdivisible 3-D layouts

3-D seismic exploration has been basic method for raising overall benefit of development seism. Major 3-D seismic exploration methods are the conventionalmethod and the bin-subdivisible method that was newly used in foreign countries.Conventional 3-D layout takes linear swath, and the CMP lies at the center of bin.Once determined, one conventional 3-D layout results in definite coverage number,relevant signal/noise ratio and certain reso1ution. Unlike the conventional 3-D layout, bin-subdivisible 3-D layout has the following essential points:. Some very special parameters are used to form unequal bins, in which thecommon-mid points scatter uniformly.. High-stacked seismic data and less-stacked high-resolution seismic data canbe obtained respectively to meet the requirements of different geological tasks.. Any informations in linear-swath conventional 3-D layout can be retained,and more potential informations are received desirably.. Convenient field operation, good coupling with static correction, less cost ofdata acquisition, fine offset azimuth design, flexible data processing, adaptation toprestack migration, and so on.