| 基于算子优化的Fourier有限差分法保幅叠前深度偏移 |
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| 引用本文： | 郭恺,仝兆岐,李振春,吕晓东. 基于算子优化的Fourier有限差分法保幅叠前深度偏移[J]. 中国石油大学学报(自然科学版), 2012, 36(2): 91-96 |
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| 作者姓名： | 郭恺 仝兆岐 李振春 吕晓东 |
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| 作者单位： | 1. 中国石油大学地球科学与技术学院,山东青岛,266580
2. 南阳油田测并公司,河南南阳,473132 |
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| 基金项目： | 国家“863”计划项目，国家科技重大专项课题 |
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| 摘 要： | 从声波方程的单程波分解出发,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,并且叠前深度偏移的质量也得到提高。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。
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| 关 键 词： | 地震资料处理 Fourier有限差分 叠前深度偏移 保幅边界条件 波场延拓算子 |
True-amplitude prestack depth migration based on operator optimized Fourier finite difference method |
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| GUO Kai , TONG Zhao-qi , LI Zhen-chun , L Xiao-dong. True-amplitude prestack depth migration based on operator optimized Fourier finite difference method[J]. Journal of China University of Petroleum (Edition of Natural Sciences), 2012, 36(2): 91-96 |
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| Authors: | GUO Kai TONG Zhao-qi LI Zhen-chun L Xiao-dong |
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| Affiliation: | GUO Kai , TONG Zhao-qi , LI Zhen-chun , L(U) Xiao-dong |
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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 migration 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 impoved.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 is variable. |
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| Keywords: | seismic data processing Fourier finite difference prestack depth migration true-amplitude boundary condition wave field continuation operator |
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