| 摘要: |
| 从声波方程的甲程波分解出发,对传统波动方程叠前深度偏移的传播算子和边界条件进行优化，推导出基于 优化算子的保幅边界条件和3个新偏移算子。通过应用新算子和边界条件,断层和倾斜层处的成像效果有明显改 善，并a脊前深度偏移的质M也得到提高。模型试算和实际资料处理结果表明，使用优化的边界条件和偏移算子，能够提高横向速度变化情况下的成像精度。 |
| 关键词: 地麄资料处理 FVnirier有限差分 叠前深度偏移 保幅边界条件 波场延拓算子 |
| DOI：10.3969/j.issn.1673-5005.2012.02.015 |
| 分类号:P631 |
| 基金项目:P4家“863”计划项< 2009AA06Z206)；阂家科技車:大专项课题(2011ZX05014-001 -008HZ) |
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| True-amplitude prestack depth migration based on operator optimized Fourier finite difference method |
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GUO Kai1,TONG Zhao-qi1,LI Zhen-chun1,Lu Xiao-dong2
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(1. School of Geosciences in China University of Petroleum，Qingdao 266580 China;2. Nanyang Oilfield Logging Company Nanyang 473132, China)
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| Abstract: |
| Beginning the one way splitting of the acoustical wave equation，continuation operator and boundary condition based on traditional wave equation in the prestack depth migralion were derived. Then the true-amplitude boundary condition and three new migration operators with the optimized operator were gotten. Through the new operators and boundary condition, the imaging effect in fault and inclined layers and the quality of the prestack depth migration were irapaved. The model calculation and real data process results show that using the optimized boundary condition and migration operators can enhance the imaging precision even if the lateral velocity i? variable. |
| Key words: seismic data processing Fourier finite difference prestack depth migration true-amplitude boundary condition wave field continuation operator |
