一种三维地层流体势的计算方法及其应用

流体势是控制地层烃类运移和聚集的重要因素。综合利用三维地层压力和Hubbert流体势模型建立了三维地层流体势的计算方法，即利用测井约束地震反演求取三维地震层速度体，结合已钻井的测井资料，以单点算法假设和克里金插值算法为基础求取三维地层压力，然后根据三维地层流体势和三维地层压力的对应关系计算得出三维地层流体势。以胜利油区博兴洼陷高89井区为例，对其三维油势进行计算，进而分析油势的分布特征及其在预测油气优势运移方向和有利聚集区带中的应用。研究结果表明，与常规的流体势等值线图相比，该方法计算的三维地层流体势在横向和纵向上的精度较高、连续性较好，便于得到各深度及各层位切片上的流体势分布特征，预测的油气低势区与实际生产情况较为吻合。

A kind of calculation method and its application on three-dimension fluid potential

This paper presents a three-dimension (3D) fluid potential method based on Hubbert fluid potential model and 3D pore pressure. First, combing 3D interval velocity data which is inverted through log-constrained seismic inversion and well logging data, it can obtain the 3D pore pressure based on spatial interpolation method and the single point hypothesis. Then, we calculate the 3D fluid potential using the mutual correspondence between the fluid potential and pore pressure. Finally, we calculate 3D fluid potential of Boxing sag as an example to illustrate the process of this method and analyze its characteristic and predict the favorable exploration area.Compared with fluid potential contour map, this method has high accuracy, good continuity.