可视化随钻地质导向技术研究

Research on the Geosteering Technology of Tthree Dimensional While Drilling

随钻地质导向技术已由地层对比式导向向动态地震导向、三维导向方向发展。传统的导向模型是依靠人工地层对比构建地层模型,构建简单,但其精度低;动态地震导向技术则是由静态剖面导向动态剖面方向发展,然而地震数据的精度低,对于薄层难以实际应用;三维导向技术是通过地震层位数据和测井邻井数据融合构建三维地层模型,然后提取二维导向剖面,指导导向工作,并在导向过程中动态校正三维模型,达到更精准指导作业。三维导向模型具有地震数据的横向精度,又有测井数据的纵向进度,能够准确地刻画地层的特征。实践证明,基于三维地质模型构建地层剖面模型更加精细,更具有实用价值。

Since twentieth Century,along with the development of horizontal well drilling technology,While drilling geological guidance technology has been made great progress,which has been developed in the direction from the stratigraphic correlation to the dynamic seismic guidance and three-dimensional orientation.The traditional guidance model is constructed by the artificial strata model.The model is simple and efficient,but the accuracy is lower.It is often dependent on the guidance of the traditional static profile.The 3D guidance technology is used to construct the 3D strata model,which is based on seismic data and logging data,and can achieve more accurate guidance.Three dimensional steering model has the horizontal precision of seismic data,and has the longitudinal progress of the log data,which can accurately describe the characteristics of the strata.The practice has proved that it is more practical to construct the stratum profile model based on 3D geological model.