Study On Regularity Of The Pressure Pulse Plugging Removal Technology Of Water Injection Wells

With the development and production of oil field.plugging is one of the most critical influences on oil and water wells production capacity.There are a lot of methods to remove the oil and water wells plug,because the advantage of operating easily, constructing simply and obviously effect on removing plug,the pressure pulse plugging removal is widely used in the middle and high permeability zone.the experience of construction has been abundant, but a few of theoretical recognition about pressure pulse plugging removal technology, it needs to be further researched.So it is necessary to do numerical simulation about pressure pulse plugging removal technology.We perform numerical simulations through OLGA software that can simulate the instantaneous motion of oil,gas and water in well,pipeline and treatment facility.The simulation of pressure pulse plugging removal can be divided into two parts to examine:first, after the pressure pulse generator opened,it causes water hammer,we research the fluctuation rules of water in wellbore and analyze the influence of wellhead pressure,the diameter of tubing,the time of opening pulse generator on fluctuation;second,water hammer wave spread in the stratum of near well,researching the pressure droop in near well stratum,analyzing the factors of affecting the range of pressure pulse plugging removal technology.We analyze and summarize the simulation results,determine the sweeping scope and radius of pressure pulse plugging removal technology.The research can lay the theory foundation for pressure pulse plugging removal technology and provide reference for construction.