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针对复杂地表地区近地表地质、地球物理条件变化剧烈、结构复杂等特点,提出近地表相和近地表相分析的概念和理论方法,在完成近地表相分析的基础上,充分利用可控震源地震采集、近地表调查等所得到的多种地学数据,进行了近地表黏弹性参数反演并提出了拟微测井的概念,进而建立了高精度的极浅近地表层模型,最后结合地震波初至层析反演实现了各种地学数据及多种近地表建模方法之间宏观与微观的全局约束,建立了具有明确地质、地球物理意义的近地表模型。微测井和VSP数据标定结果表明:该模型精度较高,实际资料处理应用中较好地解决了中长波长静校正问题。该方法代表了目前近地表模型研究的一个方向,为复杂地表地区近地表建模提供了一种新的思路与方法。
In view of the near surface geology in complex surface area, the geophysical conditions change drastically and the structure is complex, the concepts and theoretical methods of near surface facies analysis and near surface analysis are proposed. Based on the analysis of near surface facies, Acquisition and near-surface survey, the inversion of near-surface viscoelastic parameters was carried out and the concept of quasi-micro-well logging was proposed. Then a very accurate model of very shallow near surface layer was established. Finally, based on the first arrival of seismic wave The tomographic inversion realizes the macro and micro global constraints of various geoscience data and a variety of near-surface modeling methods, and establishes a near-surface model with definite geological and geophysical significance. The results of micro-logging and VSP data calibration show that the model has high precision and the medium-long wavelength static correction problem is solved well in practical data processing applications. This method represents a direction of near-surface model research and provides a new way of thinking for near-surface modeling of complex surface areas.