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首页> 外文学位 >Mathematical simulation of transport and growth of microorganisms in porous media and impacts of microbial activities on enhanced oil recovery.
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Mathematical simulation of transport and growth of microorganisms in porous media and impacts of microbial activities on enhanced oil recovery.

机译：多孔介质中微生物的运输和生长以及微生物活动对提高采油率的影响的数学模拟。

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摘要

A three-dimensional three-phase, ten-component numerical simulator was developed to investigate transport and growth of microorganisms in porous media and the impacts of microbial activities on oil recovery. The microbial activities modeled in this study included: (1) growth, retention, chemotaxis, and end product inhibition of growth, (2) the formation of metabolic products, and (3) the consumption of nutrients.; Major mechanisms for microbial enhanced oil recovery (MEOR) processes were modeled as follows: (1) improvement in sweep efficiency of a displacement process due to in situ plugging of highly-permeable zones by cell mass or due to mobility control achieved by increasing the viscosity of the displacing fluid with a biopolymer, and (2) mobilization of residual oil in porous media due to the reduction of the interfacial tension between oleic and aqueous phases by the production of a biosurfactant.; The numerical solutions for mathematical models involved two steps. First, the distributions of pressure and phase saturations were solved from continuity equations and Darcy velocities were computed. This was followed by the solution of component transport equations that describe the microbial activities.; Numerical solutions from this simulator were compared to results obtained from analytical equations, commercial simulators, and laboratory experiments. The comparisons indicated that the model accurately quantified microbial transport and metabolism in porous media, and predicted additional crude oil recovery due to microbial processes.
机译：开发了一个三维三相十分量数值模拟器，以研究微生物在多孔介质中的运输和生长以及微生物活动对采油率的影响。在这项研究中模拟的微生物活动包括：（1）生长，保留，趋化性和最终产物的生长抑制；（2）代谢产物的形成；（3）营养的消耗。微生物增强油采收（MEOR）过程的主要机理模型如下：（1）由于细胞团块原位堵塞了高渗透性区域，或者由于增加了粘度而实现了流动性控制，从而提高了驱替过程的扫除效率用生物聚合物置换流体；和（2）由于通过生产生物表面活性剂而降低了油相和水相之间的界面张力，使残留油在多孔介质中的流动。数学模型的数值解涉及两个步骤。首先，从连续性方程求解压力和相饱和度的分布，并计算达西速度。其次是描述微生物活动的组分迁移方程的求解。将此模拟器的数值解与从解析方程，商业模拟器和实验室实验获得的结果进行了比较。比较结果表明，该模型准确地定量了多孔介质中的微生物运输和代谢，并预测了由于微生物过程而产生的额外原油采收率。

著录项

  • 作者

    Zhang, Xu.;

  • 作者单位

    The University of Oklahoma.;

  • 授予单位 The University of Oklahoma.;
  • 学科 Engineering Petroleum.
  • 学位 Ph.D.
  • 年度 1994
  • 页码 162 p.
  • 总页数 162
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 石油、天然气工业;
  • 关键词

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