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横波速度是进行叠前地震反演和叠前地震属性分析的必要资料,但目前绝大多数钻井缺少横波测井资料,本文提出了一种简单但又涵盖了影响岩石地震波传播速度基本要素的横波速度预测方法,即通过对模量的Voigt上边界和Reuss下边界的加权平均来求取等效弹性模量,进而计算出横波速度,加权系数w本质上反映了组成岩石骨架的矿物颗粒与孔隙的几何性质,由纵波模量拟合得到。通过对四川盆地东北部Y井碳酸盐岩实际测井数据的处理,证明边界加权平均法能准确有效地预测出碳酸盐岩横波速度。
The shear wave velocity is a necessary data for prestack seismic inversion and prestack seismic attribute analysis. However, most drilling wells lack of S-wave well logging data at present. In this paper, a simple but comprehensive wave shear wave that covers the basic elements of rock seismic wave propagation velocity The velocity prediction method is to calculate the equivalent elastic modulus by means of the weighted average of the upper bound of Voigt and the lower bound of Reuss, and then to calculate the shear wave velocity. The weighting coefficient w essentially reflects the relationship between the mineral particles and the pores The geometric properties, obtained by the longitudinal wave modulus fitting. Through the actual log data processing of the Y well carbonate in the northeastern Sichuan Basin, it is proved that the boundary weighted average method can predict the shear wave velocity of carbonate rocks accurately and effectively.