倾角方位属性在曲流河河道砂体预测中的应用

Application of Dip Azi attribute to predicting channel sandstone of meandering river

曲流河河道迁移摆动频繁,砂体横向展布复杂多变,采用常规储层预测方法难于准确地预测砂体分布结果。以大港油田埕海一区明化镇组曲流河河道砂体研究为例,比较、分析多种地震属性,优选出能够识别出较大规模河道砂体的均方根振幅属性,结合倾角方位属性识别出河道摆动方向,双属性叠合预测曲流河侧积体分布。预测结果与后期钻井结果吻合,验证了本次预测结果的可靠性,为研究区的高效开发提供了的技术保证。

Because of the varied channel and the complex distribution of sandstone of meandering river, the conventional reservoir prediction methods are difficult to describe the distribution of sandstone exactly. In the study of the meandering river channel sandstone distribution of District 1 of Chenghai Oilfield, the RMS amplitude can identify the large-scale channel sandstone according multi-seismic attributes analysis, and the DipAzi attribute can identify the direction of the river swing, so the combination of those two properties can predict the sandstone of meandering river. The prediction is basically consistent with the later well drilling results, which confirms the reliability of this prediction and provides an important technical guarantee for the efficient development of the study area.