Evaluation of Deep Migration Performance of Large Size Elastic Profile Control Particles

Abstract

In this paper, aiming at a millimeter scale large size elastic profile control particle used in field application, an evaluation experiment on the performance of deep migration was designed, the corresponding fracture model and replacement device were made and the relevant data solution method was proposed. The effects of the fracture width, particle mass fraction and particle injection velocity on the deep migration ability of the particles were evaluated respectively. At the same time, the plugging ability of the fractured filling particles for the water flow was evaluated. The fracture width has a great influence on the pressure threshold of the particle through the fracture, while the particle mass fraction and displacement injection velocity have a certain influence on the pressure threshold, but it is not very obvious. The particle plugging system is very poor in the ability of plugging and diversion. The water film bridge is formed in the interval between fractures and has great permeability to water flow. Compared with rigid particles, elastic particles increase the deep migration ability, but the pressure capacity of plugging is weakened, so it needs to be combined with other profile control systems in practical application.