鄂尔多斯盆地姬塬地区延长组地质模型地震正演研究

Forward Modeling Research of Geological Models in Jiyuan Area of Yanchang Formation of Ordos Basin

为减少沉积体解释的多解性,在进行砂体特征描述的基础上,针对姬塬地区延长组中下部岩性体,设计了楔状体、前积体、河道沉积3种二维地质模型,进行了正演模拟,总结了各模型的地震响应特征,为定性与定量相结合正确解释和预测岩性体厚度和分布提供了依据。具有较强的针对性。

On the basis of character description of sand bodies of Late Triassic Yanchang Formation in Ordos Basin, model forwarding technology was applied to decrease the multiplicity of solutions in interpreting sedimentary bodies. Three types of 2-D geological models (Wedge, prograding bed and underwater distributary channel) were designed and modeled. The results of model forwarding are proven to be helpful interpreting and predicting the thickness and distribution of lithosomes qualitatively and quantitatively.