【摘要】 哈7三维是塔里木油田采集的第一块全方位高密度三维地震资料,主要目的是进一步提高碳酸盐岩缝洞体成像和裂缝预测精度。然而,应用现行的窄方位处理技术对全方位地震资料的优势未能充分挖掘和利用。作为面向宽方位地震资料的处理方法,炮检距向量片(OVT)技术可提供一个现今最精确、最有效的数据域来做常规处理。本文分四个步骤阐述OVT技术的实施过程:数据准备、OVT域处理、OVT域叠前时间偏移、OVG(炮检距向量道集)处理。应用结果表明,OVT技术具有稀疏不连续性(减弱采集脚印)、全局去噪和分方位插值、保留方位角和裂缝检测、更适合宽方位处理等特点和优势,可望在复杂地震成像和储层描述中发挥更大作用。更多还原

【Abstract】 The Ha7 3D is the first high-density full-azimuth 3D seismic survey in Tarim Oil Field.Its aim is to improve carbonate cave imaging and fracture prediction.However,conventional seismic processing techniques cannot fully adapt to the full-azimuth seismic data.As a wide-azimuth seismic processing method,the offset vector tile(OVT) technique provides the most effective and precise data domain in geophysics for the basic seismic processing.In this paper four steps of OVT are discussed: data preparation,processing in OVT domain,OVT prestack time migration,and OVG gather processing.OVT application results show that this approach has great advantage in many aspects,such as sparsing discontinuity,global noise attenuation,azimuthally-sectored interpolation,preserved azimuthal information and fracture detection,which will be very beneficial to complex seismic imaging and characterization.更多还原