饶阳凹陷马西地区砂、泥岩薄互层高精度储层预测的实践

High-Precision Reservoir Prediction of Thin Interbedding Sandstones and Mudstones in Maxi Area in Raoyang Sag

砂、泥岩薄互层是陆相断陷湖盆常见沉积岩叠加样式。由于岩性变化快,并受到复杂断裂影响和地震资料分辨率限制,使得准确预测砂岩横向变化及渗透砂岩发育情况难度加大。以饶阳凹陷马西地区为例,探讨了高精度储层反演和地震属性分析等方法,认为砂、泥岩薄互层区以提高分辨率为核心,在等时地层格架约束下,利用拓频、拟声波等联合反演,与地震属性相结合进行研究,可提高预测精度。实际应用取得了较好的效果。

The thin interbedding sandstone and mudstone is a common stacking style of sedimentary rocks in land facies fault lack basins.Because of the variable lithology,the influence of complex faults,and the restriction of resolution of seismic data,the horizontal variation of sandstones and the development of permeable sandstones get more difficult to be accurately predicted.Taking the Maxi area in Raoyang sag as an example,the high-resolution reservoir inversion technique and the seismic attribute analyzing technique are discussed.It is considered that the area of thin interbedding sandstones and mudstones should focus on the improvement of resolution.Limited by the isochronous stratigraphic frame,the prediction may be improved by conducting inversion of frequency expanding and pseudo-acoustic wave,and carrying out research combined with seismic attributes.Good application results have been obtained.