A New Model Of Heavy Oil Vibration Viscosity Reduction And Plug Removal

The development of science and technology and social progress are inseparable from the petroleum industry.With the continuous exploitation of oil and the continuous adoption of new technologies,new methods,new tools and new processes,some unconventional oil resources have also entered people’s vision.Heavy oil is a widely distributed unconventional petroleum resource with large reserves and wide distribution range,but it has been neglected for a long time because of its high viscosity,poor fluidity,and difficulty in exploitation.In this paper,by summarizing the impact of natural earthquakes on oilfield production,it is found that vibration waves can increase the formation pressure of the oil layer with clear directionality,and this directionality is verified by formula derivation,combined with the advantages and disadvantages of traditional heavy oil production technology,and in On this basis,it is proposed to use pressure pulses to transfer the periodic vibration wave energy into the heavy oil layer to achieve the effect of reducing the viscosity of the heavy oil layer.The following four aspects have been studied:Combining the natural seismic data of Daqing Oilfield in the past two decades and more than 2,000 production abnormal wells,and the relationship between the underground porosity and permeability of Daqing Oilfield,it was found that the seismic waves generated by natural earthquakes will drive the underground fluid to move in the direction of seismic wave When the subsurface fluid enters the small pores from the large pores,it will cause the formation pressure to increase and increase the production of oil wells.This is the theoretical basis of the research in this paper,and the content of this research has not been reported in China.By analyzing the solid-liquid two-phase coupling model of the heavy oil reservoir,the displacement and pressure of the fluid in the pore,the displacement and stress of the solid skeleton,and the changes in the seepage velocity of the pore fluid with time and space can be seen.It is found that when the low-frequency pressure pulse wave propagates in the heavy oil reservoir,a certain pressure anomaly can be formed in the heavy oil reservoir.The effects of mechanical vibration on the viscosity and interfacial tension of crude oil are summarized through experiments.It is found that under mechanical vibration conditions,the greater the viscosity of crude oil,the greater the decrease in viscosity,the greater the frequency of mechanical vibration,and the greater the change in surface tension,that is,the mechanical Vibration can change some physical properties of heavy oil in underground reservoirs,which can help reduce viscosity and remove plugging of heavy oil.The ANSYS fluid mechanics simulation software was used to simulate the viscous viscosity reduction and deblocking production model of heavy oil.From the pressure cloud diagram and velocity cloud diagram obtained from the simulation results,it can be seen that when a low-frequency hydraulic oscillation wave is applied to the heavy oil reservoir,There can be obvious water vortices on both sides of the perforation,there can be a shake-out phenomenon of heavy oil layer to reduce viscosity and plug,reduce the viscosity of heavy oil,can greatly reduce the interfacial tension between oil and water,and can deposit the aging colloid on the rock 1.Asphalt plays a role of dispersing and decomposes the macromolecular bond structure into a low viscosity,easy-flowing small molecular bond structure,which can promote the production of heavy oil.