复杂障碍区三维地震观测系统变观设计方法及应用

Method and application of variable 3-D geometry design in complex obstructive region

苏北盆地高邮凹陷的YA、ZD和ZL高精度三维工区,为典型的江苏平原水网地形,城镇密布、水网纵横、养殖业发达,大的城镇和养殖区,常造成地震资料的空白和缺口。采集过程中,XJ镇、ZW镇以及LY湖大面积养殖区成为施工的复杂障碍。通过对复杂障碍采集技术难点进行分析研究,形成了基于"3S"技术(GPS定位、卫星遥感、地理信息系统)的观测系统设计技术、基于地质目标的特殊观测系统设计技术和养殖区观测系统动态设计技术,解决了常规观测系统对ZW镇、LY湖等勘探"禁炮区"无法解决的系列问题,提高了跨越复杂障碍的能力,最终获得了较高品质的原始地震记录。

YA,ZD,ZL precise 3-D prospecting regions are typical plain and network of rivers in Gaoyou Sag,Subei Basin.In seismic acquisition,the crowded towns and developed aquacultures are complex obstructives,which often lead to the blank space and gap of the seismic data.After studying,technologies for seismic acquisition in obstructive region such as the design of geometry based on technology ＂3S＂（GPS location,remote sensing,geographic information system）,the special design of geometry based on the geological target,and the dynamic design of geometry in cultivated region were formed.These technologies solved the problems which can＇t be solved by routine geometry in forbidden zone（ZW town,LY lake and so on）,and high quality original seismic data were acquired.