南襄盆地区域大剖面采集观测系统的设计与应用

Design and application of acquisition layout of regional seis- mic profile in Nanxiang basin

南襄盆地区域大剖面工程部署的测线穿越盆地的不同构造单元,地层埋藏深浅不一,变化幅度大,不同单元的地质情况对采集使用的方法要求不一。在充分分析论证和实地试验的基础上,提出一种渐变观测系统的方法,根据工区地质构造变化趋势和目的层埋深变化情况逐段设计观测系统,在实际应用中取得了明显效果。

The survey lines of regional seismic profile in Nanxiang basin cross different tectonic units,which is different in bur- ial depth and large variation in range,therefore the geolog- ical settings in different units should be suitable to different acquisition methods.On the basis of adequate analytic dem- onstration and field test,a layout of gradual modification, which is designed segment by segment in accordance with tectonic variation and burial depth of target strata,is ad- vanced and brings an appreciable effect in the field seismic acquisition.