Fig. 6. The upper-right quarter of the contour map of steady-state normalized vertical mass flux q_z/q_0z across the uncovered surface, where q_0z = -ß. The dashed line from x_D = 0 to 2 represents half of the horizontal well screen (another half is from x_D = -2 to 0). (a) The horizontal well is at z_wD = 0.2, and (b) the horizontal well is at z_wD = 0.6.