南海西部双方位地震资料处理关键技术实践:以珠三凹陷为例

南海西部海域珠三凹陷地区地下断裂体系复杂，不同的勘探阶段采集的地震资料，方位角窄，复杂断裂带成像困难，而同一批次采集多方位三维地震采集难度大、成本高.为了更好地实现宽方位地震成像目的，可将不同年度不同方位采集的三维地震资料结合先进的多次波去除技术和地震融合技术进行联合处理，从而间接形成一个宽方位三维地震资料，据此操作将极大地降低采集成本，从实际处理效果对比分析，该方法较好地改善了复杂断裂带的成像效果. 

Technologies with Two Azimuths in West Area of South China Sea:A Case Study of Zhusan Sag

The fault system in the Zhusan Sag area of the western South China Sea is complex. The seismic data acquired at different exploration stages has a narrow azimuth,and it is difficult to image the complex fracture zones. The seismic data with different azimuths in the same batch need higher operation technology and higher cost.In order to achieve the purpose of wide-azimuth seismic imaging,3D seismic data acquired in different orientations in different years can be combined with advanced multiple suppression technology and seismic fusion technology to indirectly form a wide-azimuth 3D seismic data. This operation will greatly reduce the acquisition cost. The comparison and analysis of the actual imaging effect indicate this method can better improve the imaging effect of the complex fracture zone.