【摘要】 南阳凹陷白秋地区以寻找岩性+构造油气藏为主,对地震资料的横向分辨率和信噪比要求较高。通过研究复杂介质条件下地震波传播特性,在波动方程等设计技术理论指导下,对高精度三维观测系统性能进行定量评价,并根据地质任务的要求,进行精确设计和参数论证分析。在复杂介质条件下,以波动方程正演模拟、面论证为基础的观测系统设计,使得该区的高精度三维地震勘探从采集设计阶段开始就满足叠前偏移处理和岩性解释等要求,减少采集脚印,达到改善成像精度的目的。从白秋地区新采集的剖面看,波组特征明显,断面清晰,主要目的层信噪比高,新采集的地震资料能够满足复杂断块群构造的研究需要。更多还原

【Abstract】 The exploration of oil and gas in Baiqiu Area of Nanyang Depression was to search for lithologic and structural reservoirs,the lateral resolution and the signal-to-noise ratio of seismic data were highly required.By theoretical research on the seismic wave propagation property under the complex media conditions,and guiding by wave equation and others new design technologic theory,a 3-D observation system with high accuracy was quantitatively evaluated,and based on the geological requirements,it was designed accurately and the parameters were demonstrated.Under complex media conditions,an observation system is designed according to the wave equation forward simulation and the surface demonstration,which could meet the requirements of the pre-stack migration treatment and lithologic interpretation at the initial stage of data acquisition design for a high precision of 3D seismic exploration in the area.The acquisition footprint is reduced for the purpose of improving imaging precision.Seeing from the data acquisition profile in the area,the wave combination property is obvious,fault plain is clear high signal-to-noise ratio and the new acquisition data can meet the research demands of the structures of the fault block groups.更多还原