三维叠前深度偏移技术在潜山成像中的应用
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摘要
孤西潜山带地质构造复杂,埋藏深,地震资料信噪比低,准确成像困难。采用三维叠前深度偏移方法对孤西潜山带的连片常规三维地震资料和高精度三维地震资料进行了重新处理。对各区块数据在频率、相位、信噪比和覆盖次数等方面的差异进行了归一化、匹配滤波和剩余能量补偿等处理;基于叠前时间偏移进行了速度分析,参考井速度和合成地震记录,建立了初始速度模型;对偏移参数进行了测试和选取,采用Kirchhoff积分叠前深度偏移方法对资料进行了偏移处理。结果表明,叠前深度偏移提高了地质构造复杂地区的成像质量,断层和潜山内幕反射清晰,层位深度与钻井深度吻合较好,发现了新的有利构造。
Guxi buried hill zone is characterized by complex structures, deep buried reservoirs,low S/N in seismic data,it is difficult for accurate imaging.3D pre-stack depth migration was used to reprocess the merged 3D conventional seismic data and 3D high-precision seismic data.The difference on frequency,statistical phase,S/N and fold of the data from all blocks was processed by normalization, matched filtering and residual energy compensation.Velocity analysis was carried out based on prestack time migration,initial velocity model was established with the velocity of reference well and synthetic seismogram.Migration parameters were tested and selected. Kirchhoff integral prestack depth migration was used to process the data. The results showed that pre-stack depth migration improved the imaging quality for the area with complex structures,the reflection of fault and inner buried hill was clear,the horizon depth coincided well with drilling depth,and new favorable structure was discovered.
Guxi buried hill zone is characterized by complex structures, deep buried reservoirs,low S/N in seismic data,it is difficult for accurate imaging.3D pre-stack depth migration was used to reprocess the merged 3D conventional seismic data and 3D high-precision seismic data.The difference on frequency,statistical phase,S/N and fold of the data from all blocks was processed by normalization, matched filtering and residual energy compensation.Velocity analysis was carried out based on prestack time migration,initial velocity model was established with the velocity of reference well and synthetic seismogram.Migration parameters were tested and selected. Kirchhoff integral prestack depth migration was used to process the data. The results showed that pre-stack depth migration improved the imaging quality for the area with complex structures,the reflection of fault and inner buried hill was clear,the horizon depth coincided well with drilling depth,and new favorable structure was discovered.
引文
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13王世艳.哈萨克斯坦滨里海盆地盐下成像技术应用研究[J].石油物探,2008,47(1):35-39
14王丽,屠世杰,赵传雪,等.叠前深度偏移技术在江苏火成岩地区的应用[J].石油物探,2006,45(1):79-82
15刘西宁,刘司红,马秀国,等.叠前深度偏移技术在焉耆盆地宝南地区的应用[J].石油物探,2006,45(2): 197-201
2王世青,孟小红,王双喜,等.兴安岭山地低信噪比地震资料处理技术分析[J].石油物探,2007,46(2):187-192
3渥·伊尔马滋.地震数据处理[M].黄绪德,袁明德,译.北京:石油工业出版社,1994.203-317
4马在田.论反射地震偏移成像[J].勘探地球物理进展, 2002,25(3):1-5
5谌艳春,李守济,姚盛,等.高精度三维叠前时间偏移处理技术在四扣地区的应用[J].石油物探,2005,44(4): 370-373
6王立歆,李守济,梁鸿贤,等.Omega系统叠前深度偏移技术在平方王地区的应用[J].石油物探,2002,41 (4):489-492
7刘俊,徐右平,刘晓红.三维叠前深度偏移综合处理技术在冀中油田南孟潜山内幕油藏研究中的应用[J].石油地球物理勘探,2003,38(3):237-241
8王棣,王华忠,马在田,等.频率波数域共偏移距叠前时间偏移方法[J].石油物探,2004,43(1):8-10
9郭树祥.埕岛桩海地区连片地震资料的数据规则化处理[J].石油物探,2008,47(4):387-392
10郭树祥,王立歆,韩文功.叠前地震数据优化处理技术分析[J].石油物探,2006,45(5):497-502
11王西文,刘全新,吕焕通,等.相对保幅的地震资料连片处理方法研究[J].石油物探,2006,45(2):105-120
12云美厚,丁伟,王开燕,等.地震资料一致性处理方法研究与初步应用[J].石油物探,2006,45(1):65-69
13王世艳.哈萨克斯坦滨里海盆地盐下成像技术应用研究[J].石油物探,2008,47(1):35-39
14王丽,屠世杰,赵传雪,等.叠前深度偏移技术在江苏火成岩地区的应用[J].石油物探,2006,45(1):79-82
15刘西宁,刘司红,马秀国,等.叠前深度偏移技术在焉耆盆地宝南地区的应用[J].石油物探,2006,45(2): 197-201
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