Abstract
Horizontal wells open hole staged fracturing technology has become an important technology of horizontal well increase production. The ball seat is an important part of the whole process, directly related to the effect of fracturing. Established a geometric model for the horizontal open hole staged fracturing ball seat, used FLUENT software to study influence of the ball seat on the level of pressure drop. Analysis results show that when production is less than 20t/d, influence of the ball seat on pressure drop can negligible; and when the production is greater than 30t/d, influence of the ball seat on pressure drop is larger, and with the increase of production, the pressure drop increases parabolically. If the ball seat is in bottom hole and production is different, horizontal section pressure drop is parabola relationship with well depth, and the greater the flow, parabola correlation is more obvious; with the increase of production, the same wellbore pressure drop increases significantly increased. Field test was carried out in 131 wells and Ma 57 well in Xinjiang oil field. The test results were in agreement with the simulation results, which indicates the research conclusion is reliable.
