【摘要】 准确的横波测井速度是叠前地震反演和叠前地震属性分析的必要参数,然而实际生产中往往缺乏横波速度信息。文章针对川西Q地区须家河组中低孔隙度的特点,利用实测纵横波数据拟合、Greenberg-Castagna、临界孔隙度、Krief、Xu-White等方法对横波速度进行了预测。经过综合分析,在川西Q地区,通过实测纵横波数据拟合建立的模型和Greenberg-Castagna横波预测模型效果较好。为之后的叠前地震反演和叠前地震属性分析奠定了基础。更多还原

【Abstract】 Precise S-wave logging velocity is a necessary parameter for prestack seismic inversion and prestack seismic attribute analysis, however S-wave velocity information is always absent in the practical applications. Based on the characteristics of medium and low porosity of Xujiahe formation in XQ area, this paper uses different methods such as measured P-S wave data matching method, Greenberg-Castagna method, critical porosity method, Krief and Xu-White method to predict the velocity of S-wave. After a comprehensive analysis, the model established by the measured P-S wave data fitting method and Greenberg-Castagna method can predict the velocity of S-wave more precisely in XQ area. The precise S-wave velocity lays foundation for prestack seismic inversion and prestack seismic attribute analysis.更多还原