The flow patterns of oilwater two phase flow in concentrating type tool of production profile logging of horizontal well usually present complex polymorphism, and understanding the flow pattern transition is very useful for improving the precision of flow measurement underground. The oilwater two phase flow pattern in concentrating type tool was characterized by using the nonlinear time series recurrence plots based on impedance and capacitance signals acquired from the flow loop test. The research shows that in different flow rate and water cut, there is a corresponding relation between recurrence plot texture feature and flow pattern, which could be used in identifying the flow pattern of horizontal oilwater two phase flow.