标题:
复杂地层注蒸汽热采稠油数值模拟的研究
Research on Numerical Simulations of Heavy Oil Thermal Recovery by Steam Injection
作者:
王晓宏, 施安峰, 刘志峰, 贾江涛, 吴斌
关键字:
注蒸汽热采稠油, 油藏数值模拟, 计算流体力学, 渗流, 多相流, 自适应网格法
Thermal Recovery by Steam Injection; Reservoir Simulation; Computational Fluid Dynamics; Fluid Flows in Porous Media; Multi-Phase Flows; Adaptive Mesh Refinement
期刊名称:
《Advances in Porous Flow》, Vol.3 No.1, 2013-03-29
摘要:
本文对多孔介质中多相流动数值计算格式构造及复杂地层注蒸汽热采稠油自适应网格法方面的研究工作给予介绍。对于非均匀渗透率多孔介质中的流动问题，通过有限分析法构造数值格式，有效克服了网格结点附近渗流速度的奇点效应，和经典数值格式相比，计算效率得到了显著提高。从B-L方程出发，对于不可压缩两相流动，提出了数值模拟算法，该算法有效避免了两相渗流数值模拟的网格取向效应。对于复杂断层及复杂边界、渗透率空间分布不均匀、分布不同种类输运性质岩石或裂缝–孔隙双重介质等复杂地层中的注蒸汽热采稠油自适应网格法开展研究，大幅度提高了计算速度。在上述研究工作的基础上，自主开发了油藏数值模拟自适应网格法计算软件。
The works on the developments of the numerical scheme
for multi-phase flows in porous media and the adaptive mesh refinement in
numerical simulations of heavy oil thermal recovery by steam injection are
introduced. First, a finite analytic method was developed to deal with a
challenging problem in numerical simulations in the case of strong geological
heterogeneity, which cause the upscaling permeability to have a rapid change
cross the grid interfaces and therefore the nodal flow effects will lead the
flow fingering to the high permeability region. With the traditional numerical
scheme, refining the coarse grid enough is the only manner to describe the flow
pattern accurately. Second, for the incompressible two-phase flows, a numerical
scheme, which could avoid the grid orientation effects efficiently, was
proposed. Next, the adaptive mesh refinement technique was applied to the
numerical simulations for the processes of thermal recovery by steam injection,
where the different heterogeneous cases of the reservoir were considered, like
the reservoir with the permeability variations, the different rock-types, the
fractured porous media, the complex faulted reservoir or complex boundary
reservoirs. The proposed AMR technique is fast and can give good accuracy. At
last, on the basis of above theoretical research, a software package for the
reservoir simulations, where the AMR technique was included, was developed.