聚合物驱剖面返转确定方法研究

Polymer Flooding Method for Determining Reversal Sectional Study

在油田的开发过程当中,如果储层的吸水剖面出现了反转,将会对储层的开发产生不利的影响。因此,充分的了解并认识储层发生剖面反转的机理,能够为有效的防止剖面反转的出现提供一定的理论基础。本文利用Darcy定律推导了动态阻力系数计算方法,进行室内并联岩心物理模拟实验。通过实验发现:储层发生剖面返转,其最根本的原因是因为驱替用聚合物溶液在高、低渗透率岩心当中的动态阻力系数表现规律不同,渗透率较低的储层其阻力系数的变化率表现为不断升高,而渗透率较高的渗透其阻力系数的变化率表现为不断降低,在二者的数值相等时,储层当中的吸水剖面就会出现返转。

In the field of the development process which, if the reservoir water injection profile appeared reversed, would have a negative impact on the development of reservoirs. Thus, a full understanding of the reservoir and the mechanism of occurrence sectional reversal understanding, able to effectively prevent cross-sectional reversal appears to provide a theoretical basis. In this paper, Darcy＇ s law is derived dynamic resistance coefficient calculation methods, indoor parallel core physical simulation experiment. Found through experiments ： wraparound sectional reservoirs occur, the most fundamental reason is because the polymer solution flooding at high and low permeability core dynamic drag coefficient of performance among different laws of low permeability reservoirs drag coefficient the rate of change showed rising, while the higher penetration rate of change of permeability resistance coefficient of performance of continuous decrease, when the two values are equal, the reservoir water injection profile which will appear wraparound.