三维叠前深度偏移技术在非洲A区的应用
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摘要
本文针对非洲A区的逆掩推覆体复杂地质构造,利用先验二维地震资料的地质解释成果,建立了合理的三维地质模型;采用井资料做约束得到了较准确的三维速度模型;利用叠前深度偏移技术得到了区内逆掩推覆体的良好成像,并且与钻井深度吻合较好。利用叠前深度偏移技术对A区逆掩推覆体复杂地质构造解释取得了很好的效果,不仅在深度域对A区进行了详细的构造解释,而且发现了6个有利的圈闭。
In face of complex geologic structure of overthrust nappe in African A area, the paper used a priori geologic interpretation result of 2D seismic data to build up reasonable 3D geologic model, the borehole data as a constraint to get more acc urate 3D velocity model, and prestack depth migration technique to get good imaging of overthrust nappe in the area, which is match for drilling depth. Using prestack depth migration technique for interpretation of complex geologic structure of overthrust nappe achieved good result, which not only carried out detailed structural interpretation of A area in depth domain, but also discovered 6 favorable traps.
In face of complex geologic structure of overthrust nappe in African A area, the paper used a priori geologic interpretation result of 2D seismic data to build up reasonable 3D geologic model, the borehole data as a constraint to get more acc urate 3D velocity model, and prestack depth migration technique to get good imaging of overthrust nappe in the area, which is match for drilling depth. Using prestack depth migration technique for interpretation of complex geologic structure of overthrust nappe achieved good result, which not only carried out detailed structural interpretation of A area in depth domain, but also discovered 6 favorable traps.
引文
[1]Paradigm.PG3.0SPS,3D Kirchhoff Pre-stack DepthMigration
[2]Paradigm.PG3.0GeoDepth Power3D Tutorial
[3]渥.伊尔马滋.地震资料分析——地震资料处理、反演和解释,下册,2006
[4]程玖兵,马在田等.山前带复杂构造成像方法研究.石油地球物理勘探,2006,41(5):525~529
[5]王成祥,赵波,张关泉.基于起伏地表的混合法叠前深度偏移.石油地球物理勘探,2002,37(3):219~223
[2]Paradigm.PG3.0GeoDepth Power3D Tutorial
[3]渥.伊尔马滋.地震资料分析——地震资料处理、反演和解释,下册,2006
[4]程玖兵,马在田等.山前带复杂构造成像方法研究.石油地球物理勘探,2006,41(5):525~529
[5]王成祥,赵波,张关泉.基于起伏地表的混合法叠前深度偏移.石油地球物理勘探,2002,37(3):219~223
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