相控下的流动单元三维建模研究

Study of 3D reservoir modeling of flow unit facies-controlled

辽河油田龙10块主要储层S31段沉积微相主要为陆上辫状水道砂体、水下分流河道及三角洲前缘薄层砂砂体,储层物性非均质性较强。利用水动力单元划分法(FZI)对该油田进行流动元的识别和划分,根据FZI值,划分成4类流动单元,同时,充分应用密井网条件下的"硬数据"和地质家的经验,采用确定性建模方法建立沉积微相模型,在沉积微相控制下,应用序贯高斯随机模拟方法建立储层流动单元参数分布模型。实践表明,该方法能够很好地表征砂体的非均质性。

The micro-facies of 31 layer, the major reservoir in segment Long 10 of Shhejie Formation in Liaohe Oilfield, includes braided channel sand body on land, subaqueous distributary channel and delta front sheet sand. The reservoir is serious heterogeneities. The oilfield is identified and divided into 4 kinds of flow units according to the value of FZI in hydrodynamic unit way. The modeling is built in a deterministic way with 'hard data' of closely spaced wells and geologist’s experience. Based on the micro-facies modeling controlled, the flow unit’s distribution is predicted by Sequential Gaussian Simulation. The accuracy and practicability of the method is verified by experiment.