Study On The Degradable Ball Sealer Movement Rule In The Wellbore And Plugging Process In The Perforation

With the exploration and development,deep reservoirs as the main development object,the characteristics of high temperature,high pressure and reservoir thickness,development is high difficulty.To improve single well production,layered fracturing is the necessary means.In this paper,we study the layered fracturing.In this paper,the view of the uncertainty of pitching layered fracture in the field construction problems,through the theoretical analysis and laboratory experiments and mathematical simulation methods,to study the the ball sealer migration mechanism,and puts forward guidelines for the field construction.Simulation well for ball sealer diversion was established in this paper.Experiments under different conditions were conducted in the laboratory.The device can be from pumping displacement,ball sealer diameter and quantity,the nature of the carrier fluid and approach of plugging ball sealer,to find the optimal solution,namely the priority use liquid as a carrier fluid viscosity,input the number of ball sealer is consistent with the number of perforation,pumping the liquid displacement is greater than 0.1m~3/min.By high-speed camera recording to block the ball migration path,and calculate the ball sealer conveyance speed in the wellbore.It is concluded that the improved formula of velocity and judge the experience formula of the plugging efficiency.By Fluent software to simulate the flow field and particle migration path,change the pump into the liquid velocity and then observe the plugging efficiency compared with the experimental results,to prove the reliability of the simulation.Through the above conclusion,finally write calculation software about ball sealer layered fracture.