【摘要】 在三维地震勘探中,常常遇到大型障碍区,特别是人口稠密、经济发达的平原地区,这给观测系统布设带来很大的困难。为了穿越大型障碍物,需要变观设计,以确保最佳压制噪声,获得完整地震反射剖面资料。在研究了三星堆遗址文物保护区大型障碍观测系统的基础上,提出多种变观技术相结合的变观设计方法,其基本方法是:采用正常排列+加密接收线接收排列的技术设计,对设计的观测系统进行反复调整,在计算出变观的覆盖次数及资料空白面积后,设计出适用的最佳观测系统。通过技术变观,成功地解决了穿越三星堆遗址文物保护区大型障碍区时,有效接受和安全激发的问题,确保了目的层资料的获取,在MJⅢ期探区三维资料采集中取得了理想的效果。更多还原

【Abstract】 In 3D seismic exploration,large obstacles are often encountered in the plain area of a great number of population and developed economies,there is big difficulty for observing system layout.In order to across large obstacles,observation layout variation design is needed which can decrease noise better and gain complete data on seismic reflection profiles.Based on study of seismic geometry in the large obstacle in the Sanxingdui heritage conservation area,the paper presented change-the-view methods of combination of multi-variable technique.The basic ideas are to use the technique of regular layout and layout of additional receiver line and to design a optimal seismic geometry after the designed geometry to do repeat adjustment and the folds of observation layout variation technique are used.The issues of effective receiving and shooting in safety way going through the larger obstacle in the Sanxingdui heritage conservation area were successfully solved by the technique and ensured data proper acquisition of seismic data for target layer.One example in MJIII blocks of 3-D seismic data acquisition with achieving ideal results was presented.更多还原