可动微凝胶调驱体系室内评价

为了认识可动微凝胶这一新型调驱体系的物理化学性质,指导矿场调驱实施工作,采用激光纳米粒度测量仪、布氏黏度计及人造岩心,对可动微凝胶这一新型调驱体系进行了室内实验评价,研究了可动微凝胶的表观形态、粒径大小、黏度及封堵性能.结果表明,纳米级可动微凝胶其初始粒径为几十纳米,水化10d后粒径溶胀为几百纳米,粒径随溶胀时间增加而...

Laboratory evaluation of profile control system for soft microgel

In order to understand the physical and chemical properties of this new type of profile control system for soft micro-gel （SMG） and guide the field work, the laser particle sizing, brookfield viscometer and artificial core were adopted to measure the shape, particle size, viscosity and plugging property of SMG and evaluate the new profile control system in laboratory. The results show that the initial size of SMG is tens of nanometers, it can reach hundreds of nanometers ＇after hydrating for 10 days, and the particle diameter of SMG system increases with dilatation time. The viscosity is low and is almost invariable with the concentration, but the viscosity decreases with the increasing temperature. The plugging property of SMG is associated with permeability strongly and the certain size of system can make effective plugging in a certain degree, having the properties of in-depth profile control step by step of plugging, breakthrough, deepening and plugging again in the core. The experimental results show that SMG can expand when it contacts with water and it can block high permeability layers after expansion of SMG, so it has a good effect on in-depth profile control.