徐德龙;王秀明;宋延杰;丛健生;陈德华;

• 1:大庆石油学院地球科学学院,中国科学院声学研究所,大庆石油学院地球科学学院,大庆石油学院地球科学学院,大庆石油学院地球科学学院 黑龙江大庆163318,中国科学院声学研究所,北京100080,北京100080,黑龙江大庆163318,黑龙江大庆163318,黑龙江大庆163318

摘要：

基于共振声谱法,研究油中存在气体时引起圆柱谐振腔共振频率偏移的问题;求取单相油存在时圆柱谐振腔的声势与共振频率的表达式;采用等效速度和等效密度的方法,研究气体存在时谐振腔共振频率的偏移,并得出理论模拟曲线.结果表明:随着圆柱谐振腔内气体积分数的增大,谐振腔的共振频率明显降低;当气体体积分数增大到30%左右时,谐振腔内气的影响是主要的.此时谐振腔的共振频率与谐振腔内完全充满气体时的共振频率差别不大.该结果可解决油井内多相流问题,特别是对气体流量的测量有重要意义.

关键词： 气体;共振频率;多相流;谐振腔;数值模拟

Abstract: In this paper,the acoustic resonant frequency shift of a cylindrical cavity caused by the existence of gas in liquid is discussed on the basis of the resonance acoustic spectroscopy.Firstly,analytical expressions of the acoustic pressure and resonant frequency of the cylindrical with oil medium are derived.And then the acoustic resonant frequency shift of the cylindrical cavity with gas and liquid two-phase medium is obtained by means of the equivalent velocity and density model.And the theoretical simulation curve is calculated.Results show that the resonant frequency of the cavity decreases with the increase of the gas content(Sg),and when Sgas increases to 30%,the effect of gas is primary.At this moment,the resonant frequency of the cavity is almost the same with that in the cavity filled with gas.The conclusions of this paper are of importance to a variety of problems in multi-phase flow measurement,especially for the gas flow rate measurement in oil wells

Keywords: gases;resonant frequency;multi-phase flow;resonant cavity;numerical simulation

基金项目: 国家自然科学基金(49974024);; 黑龙江省自然科学基金(A2004-3);; 大庆油田有限责任公司研究生基金(2006)

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