泌阳凹陷核三下段高精度三维地震观测系统设计与采集效果

High accuracy seismic observation system design and acquisition effects in lower He III Member in Biyang Sag

针对泌阳凹陷核三下段的地震地质条件,从基于地质模型和叠前偏移处理的需要,结合地震波动方程模拟、照明分析等,对该区高精度三维地震采集方法进行了充分论证与研究。应用结果表明,重新采集所获得的地震资料质量较原资料有明显的改善,断裂位置成像清晰,目的层及其以上各反射层特征清晰可靠,分辨率和信噪比均有提高,剖面效果明显,达到高精度三维地震采集的目的。

Based on the condition of seismic geology in lower He Ⅲ Member in Biyang Sag and the demand of geologic model and prestack migration, associating with seismic wave equation and lighting analysis, high accuracy 3D seismic aequisiton method is fully demonstrated and studied. Its application results show that seismic data quality re-acquired is better than the former, that is, fracture position image is clear, features of target layer and other reflection layers above it are clear and reliable, resolution and signal-to-noise ratio are all improved and section effect is obvious, which achieves the objective for aequisiton of high accuracy seismic.