The Research for Delaying the Bottom Water Coning in Horizontal Wells Application Step Screen Pipe

When the horizontal well is applied to explore bottom water reservoir,oil wells will product water early and reduce the oil recovery without water,because bottom water cones to horizontal well too fast.The flow model inside wellbore of horizontal well has been developed to present a new method to delay bottom water coning through adopting step screen pipe to adjust fluid production in each division segment of the horizontal well.The method can enhance oil recovery without water through delaying the speed of bottom water coning.The actual oilfield calculation shows that the optimized arrangement step screen pipe can make the speed of bottom water coning in the horizontal identically,and delay the bottom water coning significantly.