Rules for Flight Paths and Time of Flight for Flows in Porous Media with Heterogeneous Permeability and Porosity

Figure 14

Two central clay or shale walls obstruct flow, except for sand filled fractures that leave a high permeability conduit for the flood advance across the two central low permeability walls. Low permeability walls also occur above and below the well arrays. (a) The streamlines (red curves) and flood flight times (rainbow colors for TOF scaled in unit of days) for case of Figure 12(a), where sand porosity is 5%; clay is 20%; permeability everywhere equals 100 mD. (b) The streamlines (red curves) and flood flight times (rainbow colors for TOF scaled in unit of days) for case of Figure 12(b), where sand porosity is 5%; clay is 20%; permeability everywhere equals 100 mD.

(a)

(b)