Abstract:Q nonlinear mapping method works by mapping high-dimensional data into low-dimensional data, with data interrelation unchanged. This method is used in lateral reservoir analysis. Two theoretical models are described to show the characters and correct calculation procedure of Q nonlinear mapping method. Real data analysis is made. The real data are taken from the time window where reservoir is at mid position. The statistics of six characteristic values are obtained. Six-dimensional data are mapped into two-dimensional data by using Q nonlinear mapping tiiethod, so that we can make lateral reservoir analysis. Compared with well data, the analysis result is satisfactory.