射线波阻抗反演在YA地区储层预测中的应用

本文利用射线波阻抗对苏北盆地YA地区砂泥岩薄互储层开展研究。应用结果表明射线波阻抗与声波阻抗交会能有效区分薄互储层，两者与储层物性参数的三元交会能有效判断储层物性优劣。通过YA地区的射线波阻抗反演结果准确识别了古近系始新统戴南组一段目的层两个主物源方向，精细刻画了有利砂岩展布形态并识别出砂岩上倾尖灭型圈闭，获得了良好的应用效果。

Reservoir prediction based on ray wave impedance inversion in YA area

Closer to real seismic wave propagation path by introducing ray parameter, the ray wave impedance inversion becomes a new method for reservoir prediction. Using ray wave impedance inversion we predict thin sand-shale interbeds in YA area, Subei Basin. Thin interbed reservoirs can be effectively identified by crossplot analysis of ray wave impedance with acoustic impedance from a well. And reservoir quality can be estimated by crossplots of reservoir physical parameter with ray wave impedance and acoustic impedance. Using ray wave impedance inversion, we have accurately identified two main sources of Dainan Formation, and characterized favorable sandstone distribution and sandstone updip pinchout trap.