160

160

120

120

80

80

m/day

55

¶‚

0

5

10

15

20

0 5 10 15 20Beidellit-Ca (volume%)

0 31.5

Day 20

Specify chemical composition of fluid and formation minerals from the Initial pane.

Set initial temperature Set starting and ending times

A preexponential factor and activation energy allow reaction rate to vary with temperature.

“nucleus density” allows minerals not present initially to form.

Specify kinetic rate laws for mineral precipitation and dissolution from the Reactants pane.

Set permeability to reflect changes in porosity and mineral volume.

Formation of clay mineral scale around the wellbore alters reservoir porosity and permeability.