Analysis of permeability enhancement effect of coal seam water injection based on polymer permeability enhancers
In order to improve the wettability of coal body and water injection permeability effect,on the basis of natural polymer perme-ability enhancer prepared by ourselves,starting from the reaction process,molecular structure,microcrystalline structure,as well as the effect on coal surface morphology and wetting mechanism of natural polymer permeability enhancers,the mechanism of enhancing coal permeability was studied.At the same time,molecular dynamics simulation was used to study the microscopic mechanism of interaction between permeability enhancers and coal powder.The results showed that the wettingability of water to coal was greatly improved after the addition of polymer permeability enhancers,and the experimental group with the addition of polymer permeability enhancer at the same time showed the best permeability effect.Molecular dynamics simulation obtained that the interaction strength between the permea-bility enhancer and coal system was-232.19 eV,while the interaction strength between water and coal system was-34.60 eV,indi-cating that water molecules in the solution system with the addition of permeability enhancer are more likely to adhere to the surface of coal molecules,and the intermolecular interaction force is enhanced,which will make the molecular structure attached to the coal surface more stable and more conducive to the wetting of the coal surface.The research results provide a reference basis for the development and application of coal seam water injection permeability enhancers,which helps to further improve the dust suppression effect of coal seam water injection.
coal seam water injectionpermeability enhancermolecular modificationpenetration mechanismwettability
万方数据
维普
