The computer numerical simulation of applications of pseudo-tracer method to determine the direction of water-coming in oil wells

This paper gives the theoretical method to determine water-coming volume by using pseudo-tracer. According to the flow mechanism of tracer in reservoirs, the theoretical model of numerical simulation of tracer has been established. The method that is implicit to pressure and explicit to saturation for difference solution of model is used and a numerical simulation software has been designed. The calculation method to ascertain the direction and water-coming volume of pseudo-tracer has been given. The water-coming volumes of four injection wells in Xing 4 to 6 blocks of Daqing Oilfield has been calculated and the direction of water-coming has been estimated. The reasons for remaining oil and the potential exploitation measures have been put forward. The results show that the water-coming volume of injection well sj312 is 19.28 m3, which accounts for 43% of the total water volume. This well is the main inflow direction of this block. Therefore, this research can provide theoretical basis for the remaining oil potential of other blocks.