STDUY ON TRANSITION OF GAS LIQUID TWO-PHASE VARIABLE MASS FLOW IN HORIZONTAL WELLBORE

Due to similarities and difference between gas-liquid two-phase flow in a regular horizontal pipe and in a horizontal wellbore, it is anticipated that some transition mechanisms valid for regular pipe flow need modification or extension for wellbore flow. According to the mechanism of the rapid growth of waves, considering the influence of wall inflow/outflow, obtain a method to judge the transition from stratified to non-stratified flow pattern of gas-liquid two-phase variable mass flow in horizontal wellbore,and a new method to judge the transition from dispersed bubble to intermittent flow pattern of gas liquid two phase variable mass flow in horizontal wellbore by force analyzing of dispersed bubble.