强衰减条件下能量比法的修正及其应用
发布时间：2018-10-14 19:36
【摘要】：吸收衰减是引起地震波能量损失的一个重要因素,尤其是在近地表强衰减条件下。常规的能量比法是利用地震波能量的线性衰减速率定量估测品质因子Q,不适用于近地表的强衰减(Q小于30)情况;修正的能量比法利用地震波能量的指数衰减速率估算Q值,减小了常规方法的理论误差,适用于近地表条件。仿真模型和实际资料处理结果表明,在非固有衰减(主要为几何扩散)得到较好补偿的前提下,修正能量比法估算的近地表Q值合理、可靠,具有实用性。
[Abstract]:Absorption attenuation is an important factor that causes the energy loss of seismic waves, especially under the condition of strong attenuation near the surface. The conventional energy ratio method uses the linear attenuation rate of seismic wave energy to quantitatively estimate the quality factor Q, which is not suitable for the strong attenuation near the surface (Q < 30), and the modified energy ratio method uses the exponential attenuation rate of seismic wave energy to estimate the Q value. The theoretical error of the conventional method is reduced, and it is suitable for near-surface conditions. The simulation model and the actual data processing results show that the modified energy ratio method is reasonable, reliable and practical on the premise that the non-inherent attenuation (mainly geometric diffusion) is well compensated.
【作者单位】： 中国石油新疆油田公司勘探开发研究院地球物理研究所;
【分类号】：P631.4
本文编号：2271439
[Abstract]:Absorption attenuation is an important factor that causes the energy loss of seismic waves, especially under the condition of strong attenuation near the surface. The conventional energy ratio method uses the linear attenuation rate of seismic wave energy to quantitatively estimate the quality factor Q, which is not suitable for the strong attenuation near the surface (Q < 30), and the modified energy ratio method uses the exponential attenuation rate of seismic wave energy to estimate the Q value. The theoretical error of the conventional method is reduced, and it is suitable for near-surface conditions. The simulation model and the actual data processing results show that the modified energy ratio method is reasonable, reliable and practical on the premise that the non-inherent attenuation (mainly geometric diffusion) is well compensated.
【作者单位】： 中国石油新疆油田公司勘探开发研究院地球物理研究所;
【分类号】：P631.4
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