In this work we look at MEOR processes including biopolymer production and microbial competition. We have simulated a two-phase system containing of oil, water, nutrients, metabolite (biopolymer) and biofilm using the Matlab Reservoir Simulation Toolbox (MRST) package. Different mechanisms including water viscosity improvement by the action of biopolymer and biofilm formation due to adsorption of bacteria was studied. The effect of microbial competition due to presence of indigenous bacteria on the performance of MEOR process was also studied. Results shows that the presence of biopolymer improves the oil recovery in comparison with pure waterflooding. The biopolymer improves the recovery by creation of a traveling oil bank within the reservoir. Further analysis is performed to evaluate the influence of a high permeability thief zone to the model. The presence of indigenous microbes has been revealed to limit the MEOR displacement efficiency in both MEOR and thief zone simulations.

在这项工作中，我们着眼于MEOR流程，包括生物聚合物生产和微生物竞争。我们使用Matlab油藏模拟工具箱（MRST）套件模拟了一个包含油，水，营养，代谢物（生物聚合物）和生物膜的两相系统。研究了不同机制，包括通过生物聚合物的作用提高水的粘度以及由于细菌的吸附而形成生物膜的机制。还研究了由于本地细菌的存在而引起的微生物竞争对MEOR过程的影响。结果表明，与纯水驱替相比，生物聚合物的存在改善了油的采收率。该生物聚合物通过在储层内形成移动的储油层来改善采收率。进行了进一步分析，以评估高渗透率窃贼带对模型的影响。