U.S. Geological Survey Open-File Report 03-041
Version 1.0
Table 2A
Table 2A: Molecular composition of gases from NPRA wells sampled by USGS, 1998 to 2001. | ||||||||||||||
Field | Well | Test No. | Depth, ft. | CO2 | N2 | CH4 | C2H6 | C3H8 | i-C4H10 | n-C4H10 | i-C5H12 | n-C5H12 | C6+ | |
Gubik | Gubic Test Well No. 2 | 27180 | 1834.0 | 0.12 | 1.76 | 96.88 | 0.73 | 0.035 | 0.0082 | 0.049 | 0.033 | 0.0056 | 0.013 | |
Simpson | Simpson Core Test 27 | 22201 | 1500.0 | 0.23 | 0.91 | 98.73 | 0.031 | 0.005 | ||||||
Simpson | Simpson Core Test 30/30A | 27181 | 701.0 | 0.11 | 2.28 | 97.52 | 0.015 | 0.0006 | ||||||
Simpson | Simpson Core Test 31 | 27182 | 355.0 | 0.15 | 1.52 | 98.26 | 0.017 | 0.0005 | ||||||
Umiat | Umiat No. 8 | 98RCB30 | 1312.0 | 0.08 | 0.19 | 97.3 | 1.89 | 0.22 | 0.034 | 0.14 | 0.051 | 0.028 | 0.052 | |
Wolf Creek | Wolf Creek No. 1 | 27179 | 1500.0 | 0.31 | 0.55 | 98.79 | 0.17 | 0.012 | 0.0081 | 0.0057 | ||||
Wolf Creek | Wolf Creek No. 1 | 21478 | 1500.0 | 0.31 | 0.25 | 99.2 | 0.17 | 0.014 | 0.0085 | 0.0018 | ||||
Walakpa | Walakpa No. 2 | 34477 | 2618.0 | 0.01 | 0.16 | 97.54 | 1.72 | 0.38 | 0.052 | 0.051 | 0.014 | 0.0061 | 0.047 | |
E. Barrow | East Barrow No. 14 | 35430 | 2038.5 | 0.05 | 1.4 | 97.96 | 0.46 | 0.011 | 0.0011 | 0.019 | 0.009 | 0.0066 | 0.039 | |
E. Barrow | East Barrow No. 21 | 35431 | 2012.0 | 0.2 | 4.93 | 94.04 | 0.38 | 0.033 | 0.0065 | 0.11 | 0.06 | 0.022 | 0.04 | |
E. Barrow | East Barrow No. 19 | 35433 | 2031.0 | 0.18 | 2.32 | 96.73 | 0.44 | 0.032 | 0.0083 | 0.089 | 0.048 | 0.019 | 0.037 | |
E. Barrow | East Barrow No. 15 | 35432 | 2102.5 | 0.09 | 0.77 | 98.1 | 0.87 | 0.048 | 0.026 | 0.014 | 0.0092 | 0.0036 | 0.037 | |
S. Barrow | South Barrow No. 8 | 35436 | 2309.5 | 0.06 | 0.55 | 98.46 | 0.85 | 0.024 | 0.011 | 0.007 | 0.0033 | 0.002 | 0.0088 | |
S. Barrow | South Barrow No. 13 | 35425 | 2296.0 | 0.13 | 0.71 | 98.11 | 0.94 | 0.031 | 0.021 | 0.012 | 0.0065 | 0.0034 | 0.01 | |
S. Barrow | South Barrow No. 11 | 35428 | 2265.0 | 0.19 | 0.6 | 97.98 | 1.13 | 0.029 | 0.022 | 0.01 | 0.0059 | 0.0033 | 0.014 | |
S. Barrow | South Barrow No. 10 | 35429 | 2300.0 | 0.27 | 0.72 | 97.93 | 0.97 | 0.026 | 0.023 | 0.0089 | 0.0061 | 0.0031 | 0.016 | |
S. Barrow | South Barrow NSB No1 | 35427 | 2299.5 | 0.27 | 0.73 | 97.93 | 0.96 | 0.026 | 0.023 | 0.0092 | 0.0061 | 0.0036 | 0.015 | |
S. Barrow | South Barrow No. 6 | 35434 | 2309.5 | 0.27 | 0.72 | 97.93 | 0.97 | 0.026 | 0.023 | 0.0092 | 0.006 | 0.003 | 0.018 | |
S. Barrow | South Barrow No 9 | 35435 | 2414.5 | 0.27 | 0.72 | 97.92 | 0.98 | 0.027 | 0.023 | 0.0092 | 0.0062 | 0.0032 | 0.018 | |
S. Barrow | South Barrow NSB No. 2 | 35426 | 2226.0 | 0.06 | 0.84 | 97.95 | 1.01 | 0.027 | 0.017 | 0.012 | 0.0052 | 0.003 | 0.0049 | |
Notes: | ||||||||||||||
Test No. is laboratory identification number | ||||||||||||||
Depth is in feet to mid-point of perforation or bottom of casing. | ||||||||||||||
Composition is in mole %. Trace amounts of He, H2, Ar, and O2 are not included. | ||||||||||||||
Empty cells indicate that component was not detected. | ||||||||||||||
C6+ indicates the quantity of hexane and higher hydrocarbons. |