浮动面叠前深度偏移法在山前带复杂构造成像中的应用  

Application of Floating Datum Prestack Depth Migration Method to Piedmont Complex Structure Imaging

作　　者：苏勤[1] 吕彬[1] 田彦灿[1,2] 王西文[1] 王宇超[1] 

机构地区：[1]中国石油勘探开发研究院西北分院,兰州730020 [2]成都理工大学,成都610059

出　　处：《新疆石油地质》2009年第5期560-562,共3页Xinjiang Petroleum Geology

摘　　要：复杂构造成像已成为制约山前带地震勘探的瓶颈,传统的地震成像方法由于其自身算法及适应性的限制,在此类地区难以准确成像。对浮动面叠前深度偏移方法进行选择,从理论上分析了浮动面偏移相对于固定面偏移的优势所在,通过对Kirchhoff积分法和波动方程两种方法的综合分析,认为目前积分法在山前带叠前偏移中更加适用。最后,对山前带二维测线的偏移效果对比分析,验证了浮动面叠前深度偏移方法在山前带复杂构造成像中的有效性。Complex structure imaging has become bottleneck of piedmont seismic exploration. Conventional seismic imaging method couldn＇t get correct imaging because of the limit of its algorithm and adaptability. This paper selects and analyzes the advantage of floating datum prestack depth migration over the mixed datum migration. By means of Kirchhoff integral method and wave equation method, it is shown that Kirchhoff integral method is more suitable for piedmont prestack migration. The correlation and analysis of the migration effect 2-D survey lines of piedmont zone indicate the effectiveness of this floating datum prestaek depth migration method applied to piedmont complex structure imaging.

关 键 词：浮动基准面 叠前深度偏移 山前带 KIRCHHOFF积分法 偏移孔径 

分 类 号：P631.443.4[天文地球—地质矿产勘探]