多层拟三维油藏数值模拟研究

Study on pseudo-3D numerical simulation of multilayer oil reservoir.

多层二维二相数学模型无法解决层间窜流问题 ,改进后的多层拟三维数学模型考虑了纵向流动因素。在整体保留多层二维二相模型算法优势的前提下 ,把连通层层间的流动量作为假想的源汇项加到二维二相方程中 ,在二维模型上近似实现三维模型的功能 ,使层间连通的多层油藏模拟计算结果更接近于实际油藏。多层拟三维油藏模拟软件管理平台 ,实现了油藏数值模拟输入、输出和主模型的一体化管理 ,比三维三相黑油模型的运算速度快 ,扩大了模型算法的适应范围 ,提高了模拟精度。对胜利油区大芦湖油田沙三段中亚段进行的油藏数值模拟表明 ,其整体运行效率比黑油模型提高 32 .4%

Multilayer 2D?2 phase mathematical model cannot solve the problem of interlayer channeling. The improved multilayer pseudo?3D mathematical model has considered vertical flowing factors. Adding the interlayer flow rate between two connected layers as pseudo source sink term into the 2D?2 phase equation on the premise of retaining the advantages of algorithm in multilayer 2D?2 phase model. Function of the 3D model may be embodied approximately in the 2D model, and then the simulated calculation results of multiple connected layers will be close to that of the actual reservoirs. Management platform of multilayer pseudo?3D oil reservoir simulation software realizes integrated management of input and output of reservoir numerical simulation and key model. The software has quicker operation speed than 3D?3 phase black oil model, enlarges the applicable range of the algorithm of the model and improves the simulation precision. The reservoir numerical simulation carried out in middle Es 3 of Daluhu oilfield in Shengli petroliferous province shows that the whole run efficiency is higher 23.4% than that in black oil model.