论文详情
基于局部运动学属性参数的三维多域插值算法在实际地震数据处理中具有广阔的应用前景。但这种算法通常仅适用于宽方位角三维地震数据,而海洋三维地震数据往往是窄方位角的,这就给传统算法的实现带来了一定的难度。为此,提出了一种适应于窄方位角三维地震数据的三维多域插值与规则化新算法,并设计了相应的实现流程。其策略是通过零偏移距三维频率-波数(F-K)域时间偏移与反偏移,结合零偏移距三维输出道成像方式的共反射面元成像算法(CRS-OIS),获得高信噪比的叠后模型道数据;再通过反叠加生成三维叠前CMP模型道道集,提取其运动学属性参数,基于这些运动学属性参数拟合原始三维叠前数据,从而获得信噪比向模型道逼近的优化后叠前数据体。南海深水区某三维窄方位角地震数据的试应用结果表明,新的算法完全适应窄方位角三维地震数据的特点,有效提高了数据的信噪比和规则化程度,证明了新算法的稳定性和可靠性。
The local kinematic attributes based multi-domain interpolation algorithm has huge potential in real applications.However,such kind of algorithm is always not applicable for 3D narrow-azimuth seismic data.In this paper,a novel multi-domain interpolation algorithm for 3D narrow-azimuth seismic data based on the local kinematic attributes is developed.The basic idea of this algorithm is to combine the zero-offset 3D frequency-wavenumber domain time migration/de-migration method and the zero-offset 3D-CRS-OIS method to achieve high signal-noise-ratio zero-offset post-stack model trace data.Then,a 3D model CMP gather can be generated with a smearing style de-stacking operator.The local kinematic attributes of 3D model CMP gathers will be extracted to guide for the optimization of the raw 3D CMP gathers.Thus a practical workflow is designed and applied to deep-water 3D seismic data acquired in the South China Sea.The application result demonstrated the robustness and high efficiency of the proposed workflow and algorithm.
国家科技重大专项项目(2011ZX05025-001-03)、国家自然科学基金项目(41274117)和海洋地质国家重点实验室自主课题(MG20130304)共同资助。