地震多属性分析在大牛地气田储集层预测中的应用

Application of Seismic Multi-Attribute Analysis to Reservoir Prediction in Daniudi Gas Field

提取小层的地震属性,在属性标准化和优选的基础上,采用逐步回归分析方法,建立了大牛地气田西南部已开发区某小层地震属性对砂岩厚度的回归方程。应用效果表明,振幅类属性与研究区砂岩厚度的相关性较为显著,利用建立的回归方程可以定量预测井间砂岩厚度,预测的可信度较高,且在调谐厚度范围之内,预测的可信度随砂岩厚度的增加而提高。

Through extracting seismic attributes of sub-layers, on the basis of the attributes standardization and optimization, the regression equation between sandstone thickness and seismic attributes of a sub-layer in development area of southwestern Daniudi gas field is estab- lished using stepwise regression analysis. The application effects suggest that the seismic amplitude attributes are of obvious correlation with the sandstone thickness in this area. Using the regression equation can quantitatively predict the interwell sandstone thickness, and the prediction accuracy is within setting thickness and higher with the increasing of the thickness.