Numerical Investigation on Gas Accumulation and Gas Migration in the Wavy Horizontal Sections of Horizontal Gas Wells

Figure 8

Flow conditions at different velocities when there are two wavy horizontal sections. (a) Drilling fluid flow velocity is 2 m/s. (b) Drilling fluid flow velocity is 1.6 m/s. (c) Drilling fluid flow velocity is 1.2 m/s. (d) Drilling fluid flow velocity is 1 m/s.

(a)

(b)

(c)

(d)