Experimental research on settlement and migration law of pulverized coal in vertical well of coalbed methane

Abstract

In view of the serious problem of pulverized coal production in the process of coalbed methane development, the experimental conditions were set up by using the production characteristics of coalbed gas wells, and the static sedimentation experiments and dynamic sedimentation and migration experiments of pulverized coal particles in the wellbore of coalbed methane wells were carried out. The static settling velocities of pulverized coal particles with different sizes were obtained in the static settling experiment of pulverized coal. Discovery by dynamic transport experiments, when the drainage speed is greater than 0.035m/s, 40-400 mesh pulverized coal will be carried and transported. The research results have important guiding significance for optimizing on-site drainage and mining parameters.