为实现曲流河点坝砂体水平井轨迹设计的最优化, 在准确识别点坝砂体形态与规模的基础上, 对提高点坝砂体内构造模型精度、夹层预测精度及岩性模型精度做了深入的研究, 形成了一套曲流河点坝砂体水平井地质建模方法。将该方法应用到新井钻井中, 构造模型的精度误差在0.45 m 以内, 侧积夹层预测符合率达到85%; 将该模型应用于指导水平井轨迹设计及井轨迹现场跟踪调整中, 水平取心井连续成功取心176.39 m, 砂岩钻遇率达95%以上。

Based on the accurate description of point bar, the researches on improving the accuracy of geological structural model, lithology model and modeling method of lateral accretion interbed in point bar are carried out. A geological modeling for horizontal well in point bar is proposed. The application of this method shows that the error of
structural model is within 0.45 metres and the coincidence rate of the lateral accretion interbed is 85%. It is favorable for guiding the design of the horizontal well.