探究水力空蚀物理清洗的清洗效果及数值模拟

摘要

The principle of cavitation cleaning technology and advantages, and ultra-low permeability ping 42-291 well group in ansai oilfield set tubing by cavitation erosion physical cleaning were introduced, the construction process and cleaning results were discussed in details. Based on the existing theoretical basis and practical application in oilfields to simulate the hydraulic cavitation erosion physical cleaning equipment structure, the washer was provided using CFX software flow field simulation calculation, among them, the pressure and velocity were the main factors influencing the cavitation condition, therefore, change operating parameters, with different speed and different pressure to explore the influence of cavitation effect. The results confirmed that faster, stronger the negative pressure zone, range was larger. Greater the inlet pressure, greater the blade gap flow velocity, the greater the negative pressure was higher. The structure of a cavitation jet cleaning provided the basis for further development.%介绍了空蚀清洗技术的原理及优点，并对安塞油田超低渗坪42-291井组集油管采用空蚀物理清洗，详细说明了施工过程和清洗结果。依据现有的理论依据与油田实际应用情况对水力空蚀物理清洗设备进行结构模拟，使用 CFX软件对该清洗器进行流场的模拟计算，其中，压力和流速是影响空化情况的主要因素，故改变操作参数，对不同速度和不同压力对空化效果的影响进行探究。结果证实了速度越快，负压区越强，范围越大。进口压力越大，叶片缝隙流速越大，负压也越高。对空穴射流清洗结构的进一步发展提供依据。