Seislog反演在缝洞型储层预测中的应用——以阆中大安寨段为例

The Application of Seislog Inversion in Prediction of Fracture-cavity Reservoirs——By Taking Daanzhai Member in Langzhong Area for Example

Seislog反演是以声波测井为基础,将地震记录波反演成与井旁道目的层测井声波相似的速度曲线,然后根据这种拟层速度的变化来分析岩性、储层及流体变化特征,其反演结果忠实于地震记录,具有较高的确定性,能够明显地反映岩相、岩性的空间变化,在岩性相对稳定的条件下,能较好地反映储层的物性变化。该方法在阆中大安寨段缝洞型储层预测中取得了良好的应用效果。

Seislog inversion was on the basis of sonic logging.The seismic records were converted to velocity curve that was similar to acoustic log of target layer.According to the changes of the imitated interval velocity,the variation characters of lithology,reservoir and fluid could be analyzed.The outcome was faithful to seismic record and reliable and it could reflect the space variation of lithology and lithofacies.Under the condition of stable lithology,reservoir physical property variation can be well reflected.Then it is used for predicting fracture-cavity reservoirs in Daanzhai member in Langzhong Area and good result is obtained.