Adaptive mesh refinement technique for numerical simulation of SAGD process in fracture-pore reservoirs
Adaptive mesh refinement technique for numerical simulation of SAGD process in fracture-pore reservoirs
复制标题
裂缝孔隙油藏SAGD过程数值模拟的自适应网格细化技术
DOI：
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发表时间：
2011
影响因子：
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通讯作者：
Shi, An-Feng
中科院分区：
文献类型：
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作者：
Wang, Xiao-Hong;Luo, Hai-Shan;Shi, An-Feng
为了提高缝孔双孔隙度储层蒸汽辅助重力泄油过程数值模拟计算速度，根据温度和相饱和度的空间变化，在不同区域采用不同网格尺寸，提出了双孔隙度（DK）模型下的自适应网格细化（AMR）算法和裂缝-矩阵方程分解方法。数值结果表明，与细网格解相比，所提出的AMR方法处理这类非线性问题速度快，精度高。裂缝-孔隙双孔隙型储层SAGD过程中，蒸汽室可到达储层顶部，不利于蒸汽能热效率的发挥。
To improve the numerical simulation calculation speed for steam assisted gravity drainage(SAGD) process in fracture-pore dual-porosity reservoirs,the adaptive mesh refinement(AMR) algorithm as well as the fracture-matrix equation decomposition approach under a dual-porosity(DK) model was proposed by using different grid sizes in different regions based upon the spatial variations of the temperature and phase-saturations.The numerical results show that the proposed AMR technique dealing with such nonlinear problems with the front is fast and can give good precision compared with the fine-grid solution.It is also shown that the steam chamber could reach the top of the reservoir,which is harmful to the thermal efficiency of steam energy for the SAGD process in fracture-pore dual-porosity reservoirs.