复杂构造多非零偏VSP联合成像技术应用

Multi-nonzero partial VSP joint imaging technique and its application to complex structures

非零偏VSP地震勘探技术较常规地震方法分辨率高,在获得P波的同时可以得到P-SV转换横波,是解决井旁构造和储层描述的有效手段,但是在遇到复杂构造时非零偏VSP资料处理经常不能很好成像.针对水平分量在射线坐标系中与垂直分量的坐标旋转、高效率的时间域自动拾取层位建模、时间域构造格架控制,以及自动迭代分析误差等,进行了复杂构造非零偏VSP联合成像技术研究.通过实际生产应用,取得较好效果.

Nonzero partial VSP seismic exploration technique is characterized by high resolution compared with conventional seismic methods, and it is also the available approach to solve well-side structures and reservoir description, for obtaining P-Wave data and P-SV Wave data in the meanwhile. However, it's often hard to obtain good imaging in the nonzero partial VSP data processing to complex structures. In this paper, a deep study is performed focused on the nonzero partial VSP joint imaging techniques in complex structures, such as coordinate rotation of horizontal and vertical component in ray coordinate system, high efficiency automatic pickup horizon modeling in time-domain, structural framework control in time-domain, automatic iterative analysis error and so on, and satisfactory results have been achieved in the field production.