Surface Scale Law and Prediction Model of Corrugated Plates in Oil Wells
In order to solve the scaling problem of downhole pump in oilfield development,the corrugated plate was used as the scaling component of pre-scaling device in front of the pump,and its scaling law was ana-lyzed.Based on the Kern-Seaton scaling rate model,a semiempirical formula for scale deposition was derived.Then,the turbulence-chemical interaction model and DPM model were used to simulate the scaling process of CaCO3 particles on the surface of corrugated plate in pipeline,and quantitatively analyze the influence of tempera-ture,flow rate and particle mass concentration multiple on the scaling rate.Finally,the downhole produced fluid was prepared for laboratory scaling experiment.The results show that there is a good consistency between numerical simulation and laboratory experiment.The increase in temperature and particle mass concentration promotes the scale deposition of calcium carbonate,while the increase in flow rate inhibits the scale deposition of calcium car-bonate.In the actual production process,the temperature and concentration of scale-forming ions in the well are uncontrollable.Therefore,the scaling of downhole pump can be alleviated by appropriately reduce the flow rate of produced fluid and thus increase the amount of scale buildup on the surface of the corrugated plate.The conclu-sions provide theoretical basis and new ideas for scale prevention and removal in oilfields.
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万方数据
维普
