| 强反射能量屏蔽补偿在渤海C构造中的应用 |
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| 引用本文： | 周星,徐德奎,何玉.强反射能量屏蔽补偿在渤海C构造中的应用[J].物探化探计算技术,2019(1):41-46. |
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| 作者姓名： | 周星 徐德奎 何玉 |
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| 作者单位： | 中海石油(中国)有限公司天津分公司 |
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| 摘 要： | 在渤海海域西南部广泛分布着新生界的溢流相火成岩,高速层的能量屏蔽是造成火成岩发育区下覆地层地震波场信号弱的主要原因之一。传统的自动增益控制方法(AGC)在分时窗滑动补偿下覆地层被屏蔽的弱信号的同时,破坏了火成岩与下覆地层的能量关系,且时窗内火成岩层之间的弱信号也无法得到有效恢复。这里从反射系数与振幅补偿的关系出发,基于模型论证了利用射线追踪提取地震波传播路径上的反射系数来求取补偿因子,进而开展相对振幅补偿过程的有效性。在渤海油田多个构造的振幅补偿结果,较好地恢复了火成岩屏蔽地层的能量损失,且地层间的振幅关系也得到相对保持,取得了较好的实际应用效果。
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| 关 键 词： | 火成岩 射线追踪 能量屏蔽补偿 |
The application of energy shielding compensation by strong reflection in Bohai C structure |
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| ZHOU Xing,XU Dekui,HE Yu.The application of energy shielding compensation by strong reflection in Bohai C structure[J].Computing Techniques For Geophysical and Geochemical Exploration,2019(1):41-46. |
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| Authors: | ZHOU Xing XU Dekui HE Yu |
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| Institution: | (Tianjin Branch,CNOOC Ltd.Tianjin300459,China) |
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| Abstract: | The effusive facies of igneous rock in Cainozoic are widely developed in Southwest of Bohai sea,which result in weak seismic signal of overlying strata.The conventional method such as automatic gain control could recover it using a sliding analysis window,while destroying the energy relationship between the igneous rock and overlying strata,and signal could not be recovered between igneous rocks.This paper demonstrates the efficiency of relative amplitude compensation by a model test,which extracting reflection coefficients of seismic wave travel path by ray tracing.Simultaneously,good application of many structures in Bohai oilfield also recovers the energy loss under igneous rocks,and the relative amplitude between igneous rocks is maintained. |
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| Keywords: | igneous rocks ray tracing compensation for energy shielding |
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