Information Technology Journal1812-56381812-5646Asian Network for Scientific Information10.3923/itj.2011.2350.2356LiYing-Wei XieNa KongLing-Fu 1220111012In this study, the conductance fluctuating signals of oil/gas/water were analyzed by using nonlinear chaotic recurrence, were obtained four kinds of recurrence quantification indicator, recurrence rate, determinism, average length of diagonal segment, entropy which got the transition law of the oil/gas/water three-phase flow patterns in vertical upward pipe. Specific process was: Firstly the C-C algorithm was used to determine phase space embedding dimension and time delay of nonlinear time series, then the method of using the time series data generated by the Lorenz equation to verify the sensitivity of recurrence quantification analysis was presented, finally the chaotic recurrence analysis method was used to identify three-phase flow patterns. The results show that: the texture of chaotic recurrence plot can reflect the oil/gas/water three-phase flow pattern evolution, the recurrence quantification indicator with the phase flow are more sensitive.]]>Ningde, J. and C. Wanpeng,200657274280Bochuan, C., H. Bei, H. Chunyan, Z. Ling,200216415420Zhong, W., X. Wang, Q. Li, B. Jin, M. Zhang, R. Xiao and Y. Huang,200987220227Eckman, J.P., S.O. Kamphorst and D. Ruelle,19874973977Zbilut, J.P. and C.L. Webber, Jr.,1992171199203JiKang, Z. and S. Zhihuai,200218241245Yang, J.Y., Z.L. Peng, Z.G. Yu, R.J. Zhang, V. Anh and D. Wang,2009257618626Jin, N., G. Zheng and W. Chen,20075811721179Jin-Hu, L.V., L.U. Jun-An and C. Shi-Hua,2001pp: 66-71pp: 66-71Lorenz, E.N.,196320130141Li, Y.W. and X.T. Guo,2010291516