U.S. Geological Survey Open-File Report 03-041
Version 1.0
Table 2B
| Table 2B: Stable isotope compositions of gases from NPRA wells sampled by USGS, 1998 to 2001. | ||||||||||||||
| Field | Well | Test No. | Depth, ft. | d13C, CO2 | d13C, CH4 | dD, CH4 | d13C, C2H6 | d13C, C3H8 | d13C, n-C4H10 | |||||
| Gubik | Gubic Test Well No. 2 | 27180 | 1834.0 | -42.19 | -194.5 | -30.60 | ||||||||
| Simpson | Simpson Core Test 27 | 22201 | 1500.0 | -21.16 | -57.53 | -230.8 | ||||||||
| Simpson | Simpson Core Test 30/30A | 27181 | 701.0 | -57.92 | -222.4 | |||||||||
| Simpson | Simpson Core Test 31 | 27182 | 355.0 | -56.56 | -222.6 | |||||||||
| Umiat | Umiat No. 8 | 98RCB30 | 1312.0 | -41.28 | -167.6 | -31.38 | -29.33 | -27.88 | ||||||
| Wolf Creek | Wolf Creek No. 1 | 27179 | 1500.0 | -45.05 | -232.3 | -30.25 | ||||||||
| Wolf Creek | Wolf Creek No. 1 | 21478 | 1500.0 | -44.83 | -233.9 | -30.26 | ||||||||
| Walakpa | Walakpa No. 2 | 34477 | 2618.0 | -38.12 | -162.1 | -32.73 | -30.63 | |||||||
| E. Barrow | East Barrow No. 14 | 35430 | 2038.5 | -41.76 | -178.9 | -32.30 | -32.8 | |||||||
| E. Barrow | East Barrow No. 21 | 35431 | 2012.0 | -41.07 | -170.0 | -34.18 | -32.4 | |||||||
| E. Barrow | East Barrow No. 19 | 35433 | 2031.0 | -41.05 | -175.5 | -34.52 | -32.3 | |||||||
| E. Barrow | East Barrow No. 15 | 35432 | 2102.5 | -40.18 | -176.9 | -35.97 | -30.2 | |||||||
| S. Barrow | South Barrow No. 8 | 35436 | 2309.5 | -40.85 | -182.8 | -34.88 | -30.4 | |||||||
| S. Barrow | South Barrow No. 13 | 35425 | 2296.0 | -39.77 | -172.2 | -36.52 | -28.6 | |||||||
| S. Barrow | South Barrow No. 11 | 35428 | 2265.0 | -39.77 | -175.4 | -36.45 | -27.5 | |||||||
| S. Barrow | South Barrow No. 10 | 35429 | 2300.0 | 11.11 | -39.95 | -176.0 | -36.17 | -26.7 | ||||||
| S. Barrow | South Barrow NSB No. 1 | 35427 | 2299.5 | 11.27 | -39.96 | -174.9 | -36.18 | -26.3 | ||||||
| S. Barrow | South Barrow No. 6 | 35434 | 2309.5 | 11.94 | -39.94 | -176.8 | -36.17 | -26.1 | ||||||
| S. Barrow | South Barrow No. 9 | 35435 | 2414.5 | 11.20 | -39.96 | -176.4 | -36.18 | -26.0 | ||||||
| S. Barrow | South Barrow NSB No. 2 | 35426 | 2226.0 | -39.68 | -173.7 | -36.45 | ||||||||
| Notes: | ||||||||||||||
| Test No. is laboratory identification number | ||||||||||||||
| Depth is in feet to mid-point of perforation or bottom of casing. | ||||||||||||||
| Isotopic composition in standard per mil notation, carbon relative to PDB and hydrogen relative to VSMOW. See text. | ||||||||||||||
| Empty cells indicate that component concentration was too low for reliable stable isotope measurements. | ||||||||||||||