Page 109 - Gas Wettability of Reservoir Rock Surfaces with Porous Media

Gas-wetting Alteration Agent and Gas-wetting CHAPTER 3 93

Table 3.9 Effect of Ethanol on Gas Wettability Alteration of Cores
Ethanol Concentration (%) 0 1 3 5 7 10 15 20 25
Contact angle ( ) Water 142 142 146 146 145 139 139 145 112

Oil 101 90 90 104 101 95 93 97 63

Table 3.10 Effect of Isopropanol on Gas Wettability Alteration of Cores
Isopropanol Concentration (%) 0 1 3 5 7 10 15 20 25

Contact angle ( ) Water 142 138 142 143 142 138 142 123 70
Oil 101 96 101 102 106 102 63 50 30

Table 3.11 Effect of Ethanediol on Gas Wettability Alteration of Cores
Concentration (%) 0 1 5 10 15 20 25 30 40 50

Contact angle ( ) Water 142 142 142 142 142 140 140 140 140 140
Oil 101 95 100 100 94 96 95 95 93 93

Table 3.12 Effect of Glycerol on Gas Wettability Alteration of Cores
Glycerol 0 1 3 5 7 10 15 20 25 40 50
Concentration (%)
Contact Water 142 144 146 145 145 148 144 145 143 135 125
angle ( ) Oil 101 103 101 98 97 96 93 70 92 93 70

3. Effect of isopropanol on gas wettability alteration of rock sample
surface

It can be seen from Table 3.10 that when the concentration of isopropanol in
the solution is increased to 15%, gas wettability of the treated core reduces
rapidly until it is no longer gas wettable.
4. Effect of ethanediol on gas wettability alteration of rock sample surface
It can be seen from Table 3.11 that when ethanediol is added to the treatment
solution, gas wettability of the cores is relatively unchanged. Hence, ethane-
diol doesn’t affect gas wettability alteration of cores.
5. Effect of glycerol on gas wettability alteration of cores

It can be seen from Table 3.12 that adding glycerol has little effect on gas wet-
tability alteration of cores. Thus, polyalcohol has little effect on gas wettability
alteration of cores.