Research on Simulation Method of Dynamic Killing Through Relief Well Based on Multi-phase Flow Theory
At present,most of the simulation methods of relief well dynamic killing are software simulation,while few of their reliability have been verified by field experiment.Besides,for the relief well dynamic killing experi-ment,there are problems such as lack of simulation model and having difficulty in experiment design.Therefore,a simulation method of relief well dynamic killing based on dynamic multi-phase flow theory is established,which can be used for the whole process simulation of relief well dynamic killing,as well as the scheme design of relief well dynamic killing and experiment.This method establishes a simulation model of relief well dynamic killing,which is built by well structure,mud,surface equipment and other data,and embedded with a number of function-al modules to realize downhole safety monitoring(casing shoe pressure,pipe string stress)during the simulation process,intelligent over-pressure protection of surface pumping equipment,integration of simulated killing process,etc.It provides simulation support for the scheme design of relief well dynamic killing.Simulation results indicate that high killing pump rate and killing mud with high density can help save killing time.The experiment results show that the simulation results of this method are in good agreement with the measured data.Both of the average relative errors of whole experiment process simulation and dynamic killing stage are less than 10%,verif-ying the rationality and reliability of the simulation method.The simulation method of relief well dynamic killing is of great significance for scientific and effective relief well dynamic killing and improving the success rate of relief well dynamic killing.
dynamic killingrelief welldynamic killing experimentwell control software simulation
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