摘要
在研究剩余油饱和度分布的过程中 ,针对简单应用井点参数的地质统计技术和粗网格化近似技术求取剩余油饱和度误差较大的问题 ,提出用油藏水驱开发三维流线模型来研究剩余油饱和度。油水在运动过程中遵循连续介质力学 ,其在三维空间区域的每一点处只要确定若干量就能确定系统的一个状态 ,无穷多个点处确定的量 (函数 )就构成一个“场”。三维流线模型由 4个量组成 :压力场、速度场、流体的流动轨迹及时间和饱和度场。基本思路是先求出流体在多孔介质中的压力场和流速场 ,然后求流线 (流体的流动轨迹及时间 ) ,最后求出任一流线中任一点的剩余油饱和度值。流线模型不存在数值弥散和不稳定性 ,比传统的数值模拟速度快 ,允许节点多。用流线模型预测胜利油田莱 3 8断块 2 1口生产井的含水率 ,18口井的计算值与计量值的误差在 10 %以内。图 4表 2参
To avoid the big error caused by geological statistical technique of well-point parameters and coarse grid approximation, a 3-D waterflooding streamline model is put forward to study the residual oil distribution. The flow of water and oil through porous media follows the continuum mechanics; for every point in the 3-D space, the system state is determined provided that the values of several variables are given. Definite variables at infinite number of points constitute a 'field'. The 4 variables composing the 3-D waterflooding streamline model include pressure field, velocity field, flow path of the fluid and time and saturation field. The pressure field and velocity field are figured out in the porous media; then the streamlines are obtained; and the residual oil saturation at every point on every streamline is acquired. The streamline model overcomes the numerical dispersion and instability,is faster than the conventional numerical simulation and allows for more nodes. From the water cut of 21 wells predicted by using the streamline model, the error of 18 wells is within 10%.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2004年第2期99-103,共5页
Petroleum Exploration and Development
关键词
三维流线模型
水驱开发
剩余油分布
3-D streamline model
waterflooding
residual oil distribution
