通过实验研究了影响体膨颗粒膨胀能力的主要因素。 结果表明：对于同类型颗粒，粒径越小，吸水膨胀能力越强；对于不同类型颗粒，吸水膨胀速度差异较大；温度对体膨颗粒吸水膨胀能力的影响不大；随着 pH 值增大，体膨颗粒的吸水膨胀能力增强；矿化度对体膨颗粒吸水膨胀能力的影响主要体现在 Ca2+ 和 Mg2+ 的浓度上，与总矿化度关系不大，具体表现为 Ca2+ 和 Mg2+ 的浓度越大，体膨颗粒的吸水膨胀能力越弱；聚合物浓度对体膨颗粒的吸水膨胀能力没有明显影响，但是对于同类型颗粒，加入聚合物后，吸水膨胀速度减慢，悬浮能力增强，且聚合物浓度越高，吸水膨胀速度下降幅度越大，悬浮能力越强。该研究结果为现场利用体膨颗粒配制高强度调驱剂进行深部调驱提供了实验依据。

Through the experiment, this paper studied the main influencing factors of swelling capacity of swellable particle. The result shows that for the same kind of particles, the smaller the particle size is, the stronger the water swelling capacity is; for different types of particles, the water swelling rate is quite different. Temperature has little effect on the swelling capacity of swellable particle. With the pH value increasing, the water swelling capacity of swellable particle is enhanced. The influence of salinity on water swelling ability of swellable particle is mainly reflected in the concentration of Ca2+ and Mg2+. The greater the concentration of Ca2+ and Mg2+ is, the weaker the water swelling capacity of the particles is. The polymer concentration has no significant effect on the water swelling capacity of swellable particle, but for the same type of particles, if added polymer, the water swelling rate slows down, and the suspending ability is enhanced. The higher the concentration of the polymer is, the greater the water swelling rate declines, and the stronger the suspending ability is. This result can provide experimental basis for the use of profile control agent by swellable particle for deep profile control.