复合吸水颗粒深部液流转向剂注入性研究

THE STUDY ON INJECTION PERFORMANCE OF WATER ABSORBING PARTICLES IN-DEPTH FLUID DIVERSION AGENT

由于吸水网络与控制网络的互穿结构,复合吸水材料颗粒具有吸水膨胀速度可控、吸水后强度高的特点。通过填砂管模型、变径管模型研究了复合吸水颗粒深部液流转向剂的注入特性、吸水后在孔喉中的运移情况。实验结果表明:在粒径小于孔喉尺寸的前提下,未吸水膨胀前颗粒可以顺利注入;吸水后即使颗粒直径大于孔喉直径也可以通过拉伸变形顺利通过,通过后立即恢复原状。注入过程中填砂管渗透率降低,颗粒膨胀后渗透率进一步降低,颗粒膨胀后在驱替压力足够大的情况下依然可以在填砂管微孔中运移。

The water swelling materials with molecule interpenetrating networks structure have many excellent characteristics,such as controllable swelling speed and super intension after swelling.The injection performance and the migration characteristics after swelling of water absorbing particles in-depth fluid diversion agent are studied by physical simulation experiment of sand packed model and telescoping pipeline model.The experiment results indicate that the particles before swelling can be injected successfully when the diameter of particles is less than that of pore throat.After particles swell,they can successfully pass the pore throats whose diameter is more than that of particles by extending deformation.The deformation can be immediately restored after passing.The permeability of sand packed model decreases during injection process of particles.The permeability is less after particles swell.The swelling particles can pass through pore throat when the displacement pressure is enough.