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| Influence of virtual mass force on two-phase wave velocity in acid gas and mud |
| Received:April 09, 2013 Revised:July 23, 2013 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201405013 |
| KeyWord:virtual mass force acid gas pressure wave velocity drilling mud gas and liquid two-phase |
| Author | Institution |
| 孔祥伟 |
大庆师范学院 化学化工学院, 大庆 ;西南石油大学 油气藏地质及开发工程国家重点实验室, 成都 |
| 林元华 |
西南石油大学 油气藏地质及开发工程国家重点实验室, 成都 |
| 邱伊婕 |
西南石油大学 油气藏地质及开发工程国家重点实验室, 成都 |
| 董龙 |
大庆师范学院 化学化工学院, 大庆 |
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| Abstract: |
| With consideration of interphase virtual mass force,viscous shearing force,narrow interphase momentum exchange,interphae resistance,a mathematical model for predicting the propagation velocity of pressure wave in two-phase flow of acid gas and drilling fluid was proposed based on the two-fluid model and equation of state for acid gas and drilling fluid.The p mathematical model was solved by using the small perturbation theory,and a model concerning wave number K was derived to calculate the wave velocity.Calculation results indicate that the influence of virtual mass force becomes more prominent with the increase of angular frequency and void fraction within a certain range.At high void fraction,the influence of virtual mass force appears a weakening trend with the increase of pressure.Both the increase of density and incompressibility of two-phase fluid contribute to the increase of pressure wave velocity.It is the prolongation of gas-liquid exchange time and decrease of fluctuation frequency that supply sufficient time for momentum exchange,and slow down the pressure wave velocity accordingly. |
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