Study On The Technology Of Pressure Pulse Plugging Removal And Numerical Simulation Of Its Oscillating Field

In oil-field development process oil well plugging influence oil well output seriously. At present, there are many methods can remove the oil well plugging. Because the technology of pressure pulse plugging removal uses the equipment few and operates simply, it will has very high application prospects in the future. In order to further study the theories, numerical calculation is very necessary. In this paper, the focus is on the study of the process of pressure stress pulse plugging removal to the well and the strata from several possible causes of the stratum damage and several physical plugging removal technology at home and abroad so far, and come to the impact factors of the depth of plugging removal.The process of technology of pressure pulse plugging removal can be divided into two parts to examine: first, when the pressure pulse generator open, it causes water hammer, and generated water hammer wave spread from the spread of liquid to the bottom of the well; second, water hammer wave spread from the bottom of the well to stratum. For the shaft of water hammer phenomenon, this article derives the characteristics of difference method from the characteristic line method for solving the basic equations of water hammer, come to the characteristics of the derived difference method, and the use of commercial software Matlab for easy pipeline to carry out numerical calculation of water hammer, so analyzes the impact factors of water hammer stress from the calculation results. For the pressure pulse wave at the spread of the process of the stratum, this article set up the acoustic waves spread in the stratum of the mathematical model from the basic fluid dynamics and acoustic wave theory, calculates the removal radius of different frequency sound waves under the conditions of a certain strata. Finally, analyzes the impact parameters of the pressure pulse wave spread in the stratum by the construction process of pressure pulse plugging removal parameters and the data of strata. From field application of the pressure pulse plugging removal in sieve tube sand control well, it can arrive at that this technique is an economical and practical technology, and it has broad application prospects.