分方位地震勘探研究现状及进展

从地震采集、处理和解释三方面总结了分方位角勘探的研究现状：1综合使用螺旋和蜗牛道集与震源同时激励，能够降低勘探成本并高效完成分方位地震野外采集；2炮检距向量片（OVT，Offset Vector Tile）技术是针对分方位观测带来的方位各向异性问题提出的，在处理过程中可以保留炮检距和方位角信息，提高地震成像精度；3充分利用地震波在裂缝型地层中传播时的能量衰减、相位和频率的方位各向异性信息是提高裂缝预测精度的有效手段，但目前在地震资料的处理中应用的实例很少。为了提高裂缝预测的准确性，今后应重点研究地震波的方位各向异性问题；4将多种随方位变化属性（如AVAZ等）与相干一致性融合，可有效检测地下裂缝和地层岩性，提高预测精度。

Current situations and recent progress in different azimuths seismic exploration

This paper summarizes recent progress in different azimuth seismic exploration from three aspects including acquisition,processing,and interpretation:A.Using coil gathers and snail gathers combined with multi-source simultaneous shooting can reduce the exploration cost and efficiency improve wide-azimuth acquisition; B.The offset vector tile (OVT) can solve azimuth anisotropy problems,preserve offset and azimuth information,and improve seismic imaging accuracy in the process; C.Azimuthal anisotropy within seismic wave propagation in fractured strata can be used to improve fracture prediction,but there are very fewer application examples of surface seismic.So the future research should pay more attention to the aspect in order to improve fracture prediction accuracy; D.Azimuth-relative attribute (for instance AVAZ) fusion with coherence consistency can effectively predict fractures and stratigraphic lithology.