利用地震物理模拟技术研究井间地震观测系统

Crosswell seismic layout design via physical modeling

适当的观测系统是保证野外地震记录采集质量的关键。为此,运用地震物理模拟技术,设计制作井间地震模型来研究了井间地震观测系统的设计问题。通过对观测系统类型和参数选择的模拟分析,结果表明:井间距的大小对所接收的波场有很大的影响,设计井间地震观测系统时,应当力求将射线的入射角控制在临界角以内;下倾激发、上倾接收得到的井间记录能更好地反映井间介质的变化。上述结论可用于指导实际的野外采集观测系统的设计。

The optimal seismic layout is the key to guarantee the quality of seismic acquisition.This paper studies the layout design of crosswell seismic via physical modeling.The following understandings are obtained through a simulation analysis of the types and parameters of seismic layout.Seismic wavefield is affected greatly by well spacing.The incidence should be within the critical angle whenever possible in designing seismic layout.To better reflect the variations of media between wells,it is preferred to shoot at the updip side and receive at the downdip side.These understandings can be used to guide field seismic layout design.