庙北地区馆陶组砂岩百分含量预测

Sand content prediction for the Guantao formation in Miaobei area.

庙北地区馆陶组砂、泥岩速度差在 2 0 %以上 ,因此可利用速度来预测砂岩百分含量。其方法是 ,首先把地震层速度转换为测井层速度 ,并使用包络线法制作砂泥岩测井层速度量板。然后以此为根据 ,在基于三维测井约束反演层速度场的前提下 ,对庙北地区馆陶组地层的砂泥岩百分含量进行预测。经后期钻井资料验证 ,该方法预测效果好 ,预测精度高。

Seismic velocity contrast between sand stone and mud stone in Miaobei Guantao formation may be above 20%; therefore, sand content can be predicted by using velocity. Prediction procedure involves the below essential steps: ·Convert seismic interval velocity into log interval velocity. ·Make a log interval velocity template for sand shale formation by using envelope method. ·Predict the sand percentage content of Guantao formation under the premise that interval velocity field is restricted by 3D log data. The drilling data have proved that the method brings satisfactory prediction effect.