| |
Oil Properties |
Reservoir Characteristics |
Detail
Table
in Ref.
16 |
EOR
Method |
Gravity
(°API) |
Viscosity
(cp) |
Composition |
Oil
Saturation
(%PV) |
Formation
Type |
Net
Thickness
(ft) |
Average
Permeability
(md) |
Depth
(ft) |
Temperature
(°F) |
Gas Injection Methods (Miscible) |
| 1 |
Nitrogen and flue
gas |
>35↗48↗ |
>0.4↘0.2↘ |
High percent
of C1 to C7 |
>40↗75↗ |
Sandstone or
carbonate |
Thin unless
dipping |
NC |
>6,000 |
NC |
| 2 |
Hydrocarbon |
>23↗41↗ |
<3↘0.5↘ |
High percent
of C2 to C7 |
>30↗80↗ |
Sandstone or
carbonate |
Thin unless
dipping |
NC |
>4,000 |
NC |
| 3 |
CO2 |
>22↗36↗a |
<10↘1.5↘ |
High percent
of C5 to C12 |
>20↗55↗ |
Sandstone or
carbonate |
Wide range |
NC |
>2,500a |
NC |
| 1-3 |
Immiscible gases |
>12 |
<600 |
NC |
>35↗70↗ |
NC |
NC if dipping
and/or good
vertical
permeability |
NC |
>1,800 |
NC |
(Enhanced) Waterflooding |
| 4 |
Micellar/Polymer,
ASP and Alkaline
Flooding |
>20↗35↗ |
<35↘13↘ |
Light,
intermediate,
some organic
acids for
alkaline floods |
>35↗53↗ |
Sandstone
preferred |
NC |
>10↗450↗ |
>9,000↘3,250 |
>200↘80 |
| 5 |
Polymer Flooding |
>15 |
<150>10 |
NC |
>50↗80↗ |
Sandstone
preferred |
NC |
>10↗800↗b |
>9,000 |
>200↘140 |
Thermal/Mechanical |
| 6 |
Combustion |
>10↗16→? |
<5,000
↓
1,200 |
Some
asphaltic
component |
>50↗72↗ |
High-porosity
sand/sandstone |
>10 |
>50c |
<11,500
↘3,500 |
>100↗135 |
| 7 |
Steam |
>8 to
13.5→? |
<200,000
↓
4,700 |
NC |
>40↗66↗ |
High-porosity
sand/sandstone |
>20 |
>200↗2,540↗d |
<4,500 ↘1,500 |
NC |
| - |
Surface mining |
7 to 11 |
Zero cold
flow |
NC |
>8 wt%
sand |
Mineable tar
sand |
>10e |
NC |
>3:1
overburden to
sand ratio |
NC |
NC=Not Critical
Underlined values represent the approximate mean or average for current field projects
aSee Table 3 Ref. 16.
b> 3md from some carbonate reservoirs if the intent is to sweep only the fracture system
cTransmissibility >20 md-ft/cp
dTransmissibility >50 md-ft/cp
eSee depth. |
