Research Article
Light Hydrocarbon Geochemistry of Oils in the Alpine Foreland Basin: Impact of Geothermal Fluids on the Petroleum System
Table 1
Sample list with selected reservoir conditions, chemistry, and isotopic composition of reservoir water.
| Sample code | Sample type | Res. age | Depth | Res. temp. | °API | Mch/Tol | Ch/B | C15−/ | Water chemistry [mg/l] | Water [V-SMOW] | [m] | [°C] | C15+ | Li+ | Na+ | K+ | Mg2+ | Ca2+ | F− | Cl− | Br− | J− | | | H | O |
| A | OA | Eo | | | 31.8 | 85.7 | 257.1 | 2.6 | | | | | | | | | | | | | | B1 | OA | Eo | | | | 19.1 | 72.1 | 4.2 | | | | | | | | | | | | | | B2 | OA | Eo | | | | 23.3 | 174.2 | 3.3 | | | | | | | | | | | | | | B3 | OA | Eo | | | | 15.5 | 98.4 | 3.5 | | | | | | | | | | | | | | C | O, W | Eo | 1151 | | 36.1 | 10.2 | 28.2 | 4.3 | 0.2 | 1965 | 12 | 12 | 44 | 8.5 | 2910 | 22.2 | 5.2 | 0 | 11 | | | D1 | OA | Eo | 1059 | | | 83.7 | 904.0 | 2.7 | | | | | | | | | | | | | | D2 | O, W | Eo | 1142 | 55 | 32.6 | 79.9 | 517.3 | 3.3 | 0.2 | 1335 | 7 | 7 | 36 | 10.0 | 1945 | 13.1 | 2.2 | 1 | 5 | | | D3 | OA | Eo | | | | 98.2 | 40.1 | 2.2 | | | | | | | | | | | | | | D4 | O, W | Eo | 1048 | 48 | 32.6 | 82.7 | 209.7 | 2.8 | 0.6 | 1626 | 12 | 9 | 25 | 9.0 | 2104 | 15.2 | 3.7 | 0 | 1 | | −7.1 | E1 | OA | Eo | | | | 4.5 | 6.3 | 3.6 | | | | | | | | | | | | | | E2 | O | Eo | 1869 | 65 | 33.1 | 3.3 | 3.8 | 3.4 | | | | | | | | | | | | | | F1 | O | Eo + Ce | 2030 | | 34.8 | 3.3 | 4.2 | 4.2 | | | | | | | | | | | | | | F2 | O | Ce | 2381 | | 33.1 | 3.8 | 5.2 | 4.0 | | | | | | | | | | | | | | G1 | OA | Ce | | | | 5.1 | 8.9 | 3.5 | | | | | | | | | | | | | | G2 | OA | Eo | | | | 2.4 | 2.6 | 4.0 | | | | | | | | | | | | | | H | OA | Eo | | | | 3.3 | 3.3 | 3.3 | | | | | | | | | | | | | | I1 | O, W | Eo | 2463 | 86 | 32.1 | 2.4 | 3.2 | 3.4 | 3.2 | 4357 | 47 | 25 | 215 | 2.7 | 6862 | 59.8 | 9.9 | 3 | 45 | −24.6 | −0.6 | I2 | O | Eo | 2465 | 86 | 32.1 | 2.8 | 3.6 | 4.2 | | | | | | | | | | | | | | J1 | O | Eo | 2058 | 68 | 35.3 | 1.7 | 3.0 | 3.8 | 1.3 | 6337 | 51 | 38 | 472 | 6.1 | 9498 | 102.4 | 24.3 | 0 | 75 | | | J2 | O | Eo | 2118 | 80 | 37.1 | 1.8 | 2.3 | 0.5 | | | | | | | | | | | | | | J3 | WA | Eo | | | | | | | 1.2 | 4002 | 58 | 24 | 194 | 2.1 | 6562 | 50.4 | 9.3 | 1 | 1 | −39.6 | −4.3 | J4 | WA | Eo | | | | | | | 0.9 | 4073 | 53 | 20 | 168 | 2.3 | 6769 | 38.2 | 7.1 | 1 | 22 | −39.5 | −2.7 | J5 | O | Eo | 2067 | 79 | 35.3 | 1.9 | 3.0 | 3.9 | | | | | | | | | | | | | | J6 | O | Eo | 2106 | 69 | 35.8 | 1.9 | 2.4 | 4.0 | | | | | | | | | | | | | | J7 | WA | Eo | | | | | | | 1.2 | 5028 | 74 | 29 | 365 | 2.8 | 8804 | 43.0 | 7.6 | 1 | 128 | −29.1 | −3.45 | K | O | Ce | 2341 | 71 | 33.2 | 6.8 | 6.4 | 3.4 | | | | | | | | | | | | | | L1 | OA | Eo | | | | 2.8 | 4.1 | 3.5 | | | | | | | | | | | | | | L2 | O, W | Eo | 2059 | 69 | 36.6 | 2.0 | 2.7 | 4.9 | | | | | | | | | | | | −23.1 | −1.3 | L3 | O, W | Eo | 2038 | 69 | 36.6 | 2.2 | 2.7 | 5.2 | | | | | | | | | | | | −12.9 | 0.6 | M | OA | Eo | | | | 3.0 | 6.4 | 3.1 | | | | | | | | | | | | | | N1 | O | Eo | 1700 | 62 | 36.4 | 2.1 | 3.6 | 3.2 | | | | | | | | | | | | | | N2 | O | Eo | 1754 | 62 | 36.4 | 2.6 | 3.4 | 4.7 | | | | | | | | | | | | | | N3 | O | Eo | 1752 | 62 | 36.4 | 2.7 | 3.5 | 4.8 | | | | | | | | | | | | | | N4 | O, W | Eo | 1683 | 62 | 36.4 | 2.4 | 3.3 | 5.6 | 2.4 | 5926 | 45 | 53 | 212 | 1.5 | 9299 | 74.6 | 18.2 | 2 | | −30.6 | −2.2 | N5 | O | Eo | 1694 | 62 | 36.4 | 2.3 | 3.7 | 3.6 | | | | | | | | | | | | | | N6 | O, W | Eo | 1761 | 62 | 36.4 | 2.4 | 3.3 | 4.9 | 3.0 | 6758 | 47 | 84 | 338 | 2.1 | 10748 | 96.5 | 24.7 | 1 | 2 | −23.0 | −0.4 | O | O | Eo | 1620 | 60 | 37.8 | 3.0 | 4.4 | 5.3 | | | | | | | | | | | | | | P | O | Eo | 1706 | 58 | 37.2 | 2.5 | 5.2 | 8.1 | | | | | | | | | | | | | | Q | OA | Ce | | | 34.4 | 5.8 | 9.4 | 3.8 | | | | | | | | | | | | | | R | OA | Eo | | | 33.4 | 3.8 | 6.0 | 3.0 | | | | | | | | | | | | | | S1 | OA | Eo | | | | 6.5 | 15.7 | 3.0 | | | | | | | | | | | | | | S2 | O | Ce | 2754 | 90 | 31.7 | 6.4 | 4.4 | 2.6 | | | | | | | | | | | | | | S3 | O | Eo | 2230 | 85 | 31.9 | 9.6 | 7.7 | 3.4 | | | | | | | | | | | | | | T | O | Eo | | | | 8.3 | 11.4 | 4.5 | | | | | | | | | | | | | | U1 | OA | Ce | | | | 59.3 | 130.2 | 1.6 | | | | | | | | | | | | | | U2 | O, W | Ce | 1611 | 62 | 30.2 | 45.9 | 30.2 | 2.1 | 0.2 | 929 | 19 | 5 | 17 | 8.4 | 888 | 4.7 | 1.2 | 1 | 19 | | | U3 | O, W | Ce | 1577 | 57 | 30.2 | 56.5 | 38.9 | 2.4 | | | | | | | | | | | | −51.4 | −5.8 | U4 | O, W | Ce | 1574 | 57 | 30.2 | 43.1 | 30.6 | 2.2 | 0.5 | 1990 | 30 | 5 | 24 | 0.6 | 1821 | 5.0 | 1.7 | 116 | 30 | −41.4 | −4.8 | V | OA | Ce | | | | 50.4 | 88.8 | 1.9 | | | | | | | | | | | | | | W | O | Eo | 2780 | 87 | 34.7 | 1.7 | 2.7 | 3.0 | | | | | | | | | | | | | | X | O | Eo | 3342 | 110 | 31.4 | 2.2 | 2.9 | 3.3 | | | | | | | | | | | | | | Y | O, W | Eo | 2240 | 85 | 32.8 | 3.5 | 4.4 | 2.7 | 1.7 | 4994 | 41 | 30 | 70 | 1.8 | 7557 | 51.2 | 6.5 | | 159 | | | Z | OA | Eo | | | 33 | 4.6 | 15.1 | 4.1 | | | | | | | | | | | | | | AA1 | O, W | Eo | 1819 | 70 | 35.5 | 3.3 | 9.8 | 3.4 | 2.0 | 2681 | 40 | 18 | 49 | 4.1 | 3433 | 26.1 | 6.8 | 3 | 192 | | | AA2 | O, W | Eo | 1810 | 73 | 35.6 | 2.8 | 4.9 | 3.1 | | | | | | | | | | | | −36.5 | −2.5 | AA3 | O, W | Eo | 1855 | 71 | 35.3 | 3.3 | 10.3 | 4.1 | 2.0 | 3117 | 33 | 12 | 20 | 4.7 | 4155 | 31.8 | 9.1 | 18 | 76 | −48.3 | −4.2 | AA4 | OA | Ce | | | | 6.1 | 18.5 | 2.6 | | | | | | | | | | | | | | AB | O, W | Eo | 1408 | 63 | 35.5 | 4.5 | 15.0 | 3.0 | 1.1 | 4143 | 83 | 55 | 139 | 2.0 | 5823 | 54.0 | 15.1 | 1 | 3 | | | AC | O | Eo | 2197 | 85 | 34.5 | 3.1 | 9.3 | 4.3 | | | | | | | | | | | | | | AD | O | Eo | 2503 | 86 | 33.5 | 2.0 | 4.9 | 4.1 | | | | | | | | | | | | | |
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True vertical depth subsurface. Ratio calculated based on all peaks above chromatographic baseline. O, oil; OA, oil archival; W, water; WA, water archival; Res. age, reservoir age; Ce, Cenomanian; Eo, Eocene; Res. temp., reservoir temperature; Mch, methylcyclohexane; Tol, toluene; Ch, cyclohexane; B, benzene.
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