Table 1. Elemental concentration of carbon and oxygen in various reservoir constituents.
| Reservoir constituent |
Chemical formula |
Bulk
density (g/cm3) |
Elemental
concentrations ( 1022
atoms/cm3) |
||
|---|---|---|---|---|---|
| Carbon | Oxygen | ||||
Gas hydrate structure-I |
7.598CH4+46H2O |
0.9 |
0.439988 |
2.662037 |
|
Methane gas |
CH4 (2.580 MPa, 273.15 K) |
(1.209 mol/dm3) |
0.072807 |
0 |
|
Pure water |
H2O |
1.0 |
0 |
3.342758 |
|
Ice |
H2O |
0.92 |
0 |
3.008482 |
|
Quartz |
SiO2 |
2.65 |
0 |
5.311965 |
|
Calcite |
CaCO3 |
2.71 |
1.630520 |
4.891559 |
|
Illite |
K1-1.5Al4(Si6.5-7Al1-1.5)O20 (OH)4 |
2.53 |
0 |
4.938860* |
|
Smectite |
(Montmorillonite) (Ca,Na)7(Al,Mg,Fe)4(Si,Al)8O20(OH)4 |
2.12 |
0 |
4.637710* |
|
Kaolinite |
Al4(Si4O10)(OH)8 |
2.42 |
0 |
5.059320 |
|
Chlorite |
(Mg,Al,Fe)6(Si,Al)4 O10(OH)8 |
2.77 |
0 |
4.938860 |
|
Pure carbon (organic) |
C |
1.2 |
6.016530 |
0 |
|
Note: * = oxygen elemental concentrations do not include bound water.