论文部分内容阅读
常规地震勘探是建立在各向同性的理论基础上的，反射时差曲线通常用双曲时差方程近 似。双曲时差方程只有在均匀各向同性介质或椭圆型各向异性介质的短排列中成立。许多研 究发现，地下介质各向异性的存在，可能严重地影响了许多基本处理流程和解释成果的精 确性。在横向各向同性介质中，本文研究了短、中、长排列时的P波、SV波的反射旅行时近似计算公式，该式提供了一种快速有效的估算旅行时的方法。通过数值计算得到了旅行时时距曲线，表明了反射时距曲线的特征，证明了计算方法的有效性和可行性。这对各向异性介 质中的弹性参数反演、偏移成像和地震资料的精确解释等都有重要意义。
Conventional seismic exploration is based on the isotropic theory, and the reflex time-of-flight curve is usually approximated by the hyperbolic time difference equation. The hyperbolic time difference equation is valid only for the short isotropic medium or elliptical anisotropic medium. Many studies have found that the presence of anisotropy in the subterranean media can seriously affect many of the basic processes and explain the accuracy of the results. In transversely isotropic media, this paper studies the approximate calculation formula of P-wave and SV-wave reflection when traveling in short, medium and long sequences, which provides a fast and effective method for estimating travel time. The time-travel curve of travel time is obtained by numerical calculation, which shows the characteristics of the curve of time-history of reflection and proves the effectiveness and feasibility of the calculation method. This is of great importance for the retrieval of elastic parameters in anisotropic media, migration imaging and the accurate interpretation of seismic data.