The Ultrasonic Vibration Recovery of Rock Permeability Damaged by Filtration of Crude Oil

High-frequency oscillations have a good effect on the ability of geomaterials to pass fluid through themselves in the presence of paraffins in the filtered liquid. To assess the influence of high-frequency vibrations on changes in the permeability of rocks through which paraffin oil is filtered, it is necessary to create conditions and a scale similar to well conditions. According to these conditions, the influx of waxy oil coming from the formation into the production well must be modeled in conjunction with ultrasonic vibrations emanating from the well and propagating in the opposite direction to the fluid flow and passing through the rock matrix and fluid. To bridge the gap between small-scale studies and field observations, studies were performed on core samples of three different permeabilities. The laboratory bench is a modified core flooding system that allows you to create a fluid flow through the geomaterial (simulating the flow of oil from the reservoir to the well) in a field of high-frequency loads. The fluid outflow chamber has been improved. To generate high-frequency loading, a Langevin-type piezoelectric actuator is used. When the drive is turned on, the lid oscillates and loads the liquid in the chamber, resulting in a wave of compression and discharge through the cone. Ultrasonic vibration leads to displacement of pore cavities, deformation of paraffin wax and their movement towards the cavities. The force threshold of adhesion of deposits to the wall with the help of oscillatory acceleration, paraffin and asphaltene particles break off and are pushed further along the channel by the oil flow. The ultrasonic vibration on the rock, through which paraffinic oil is filtered, helps to restore the oil permeability coefficient for samples of medium and high permeability. The force threshold for the adhesion of paraffins to cavities is overcome by vibrations of the paraffin matrix and the deposits are pushed by the liquid in the direction of the well. The impact of high-frequency vibrations on the geomaterial through which formation fluid flows helps restore the oil permeability coefficient for geomaterials of medium and high permeability.