表面活性剂驱组分输运过程模拟

Simulation of component transport in surfactant flooding processes.

建立了表面活性剂驱组分输运数学模型 ,将模型中所需的物化参数描述为与驱油剂浓度相关的函数。定义了“有效驱替带长度”参数 ,量化和分析了吸附、扩散弥散、段塞尺寸和驱替速度等因素对组分输运过程与结果的影响机理。分析了大庆油田ASP常用表面活性剂ORS 41在孔隙输运过程中的有效性和持久性。研究成果不仅可以为表面活性剂驱和ASP复合驱工程工艺方案设计和动态监测提供指导 ,而且可用于代替部分实验室流动实验和辅助机理研究。研制的模拟软件的显著特点是对注化学剂段塞情况下的数学模型计算进行了边界条件处理 ,用有限差分的预测 校正格式使计算结果更为准确可靠 ,其可靠性可用相应的物理模拟 (流动 )实验进行验证。图 4参

A mathematical model of component transport in surfactant flooding has been built up, in which the needed physical chemistry parameters were modeled as chemical concentration dependent functions. The parameter of “effective displacement zone size” was defined to quantify and analyze the mechanisms that many factors such as adsorption, diffusion dispersion, slug size, and displacement velocity influencing on component transport processes and results. The validity and durability of surfactant ORS 41 transport in porous media during ASP combination flooding in Daqing oil field are analyzed. The research achievements will not only be a guideline for engineering & technology project design and dynamic monitoring of combination, but also can replace partial flow displacement in laboratory and assisted mechanism investigation. The distinct feature of the developed simulator is the very skillful process of boundary conditions in the calculation of mathematical model in chemical slug injection, and providing more reliable and accurate results by using finite differences solution of prediction and correction format. The reliability can be examined by corresponding physical simulation (displacement) experiments.