一种建立低渗透油藏三维非均质流体模型的方法

A method for building 3D heterogeneous fluid model in low permeability oil reservoirs.

低渗透储层物性差、非均质严重 ,储层内部油水分布、渗流规律各不相同 ,不同试验样品的相对渗透率曲线和毛细管压力曲线差别大。在油藏数值模拟研究中 ,用传统的一条或几条相对渗透率曲线来描述油田原始油水分布和含水上升规律不能满足模拟精度的要求。根据储层分类系数 ,应用样品毛管压力曲线、相对渗透率曲线和测井解释含水饱和度 ,提出了建立低渗透油田三维非均质流体模拟模型的一种新方法 ,并在实际模拟中得到了很好的应用。

There are various oilwater distribution, percolation flow rules within reservoirs and large difference among relative permeability curves and capillary pressure curves for different experimental samples because of poor physical properties of the reservoirs and severe heterogeneity. In the study of numerical simulation of oil reservoirs, describing original oilwater distribution and incremental rules of water cut in oilfield using one or several relative permeability curves can′t meet the needs of simulation accuracy. A technical method for building 3D heterogeneous fluid simulation model in the lowpermeability oilfield is advanced based on the capillary pressure curves and relative permeability curves of the samples, and water saturation by log interpretation beginning with the classification factors of the reservoirs, and it is used in actual simulation research very well.