基于多孔介质中聚合物弹性的相渗曲线研究

发布时间：2018-03-14 09:37

本文选题：聚驱　切入点：相对渗透率　出处：《西南石油大学学报(自然科学版)》2017年04期 　论文类型：期刊论文

【摘要】：聚驱相对渗透率曲线对进一步认识聚合物驱的渗流规律具有重要意义,但现有研究并未充分考虑聚合物在多孔介质中的弹性,因此对传统计算方法的聚合物弹性进行修正。设计了一种弹性恢复实验,测定消除弹性后的纯黏压差,来计算聚合物在岩芯中的弹性黏度。将聚合物的弹性以弹性黏度的形式引入相对渗透率曲线的计算。结果表明不考虑弹性黏度,计算的水相相对渗透率偏小。测定了不同分子量和不同浓度聚合物的相对渗透率曲线。结果表明分子量越大,弹性黏度越大;浓度越高,弹性黏度越大。弹性黏度的增大会使油相相对渗透率增大,水相相对渗透率降低,残余油饱和度也随之降低。另外,此方法与传统J.B.N.方法相比,计算的相对渗透率曲线不受到流速的影响,计算结果更加可靠。
[Abstract]:The relative permeability curve of polymer flooding is of great significance for further understanding the percolation law of polymer flooding, but the present research has not fully considered the elasticity of polymer in porous media. Therefore, the elasticity of polymer is modified by traditional calculation method. An elastic recovery experiment is designed to determine the pure viscosity pressure difference after eliminating elasticity. To calculate the elastic viscosity of polymer in core. The elasticity of polymer is introduced into the calculation of relative permeability curve in the form of elastic viscosity. The results show that elastic viscosity is not considered. The calculated relative permeability of aqueous phase is small. The relative permeability curves of polymer with different molecular weight and concentration are measured. The results show that the higher the molecular weight, the greater the elastic viscosity and the higher the concentration, The higher the elastic viscosity is, the higher the relative permeability of oil phase is, the lower the relative permeability of water phase is, and the lower the residual oil saturation is. In addition, compared with the traditional J.B.N. method, this method can increase the relative permeability of oil phase, decrease the relative permeability of water phase and decrease the saturation of residual oil. The calculated relative permeability curve is not affected by the velocity of flow, and the calculated results are more reliable.
【作者单位】：中国石油化工股份有限公司石油勘探开发研究院;中国石油大学(北京)提高采收率研究院;
【分类号】：TE357.46

【相似文献】