Oil & Gas Geology ›› 2023, Vol. 44 ›› Issue (1): 46-54.doi: 10.11743/ogg20230104
• Petroleum Geology • Previous Articles Next Articles
Hui TIAN1,2(), Zijin WU1, Haifeng GAI1,2, Xing WANG1,2
Received:
2022-06-06
Revised:
2022-11-19
Online:
2023-01-14
Published:
2023-01-13
CLC Number:
Hui TIAN, Zijin WU, Haifeng GAI, Xing WANG. Experimental study on late gas generation characteristics of the Middle Devonian sapropelic source rocks of in Northwestern Sichuan Basin[J]. Oil & Gas Geology, 2023, 44(1): 46-54.
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Table 1
Basic geochemical parameters of the Middle Devonian Guanwushan Formation source rocks in Northwestern Sichuan Basin"
样品名称 | TOC/% | S1/(mg·g-1 ) | S2/(mg·g-1 ) | Tmax/℃ | HI/(mg·g-1 ) | δ13C/‰ |
---|---|---|---|---|---|---|
D2G-1 | 2.75 | 0.72 | 4.19 | 450 | 152 | -28.8 |
D2G-2 | 2.67 | 0.78 | 4.15 | 453 | 155 | -28.5 |
D2G-3 | 3.57 | 1.09 | 5.43 | 450 | 152 | -28.5 |
D2G-4 | 1.90 | 0.48 | 2.47 | 453 | 130 | -28.6 |
D2G-5 | 2.20 | 1.10 | 3.17 | 451 | 144 | -28.3 |
D2G-6 | 2.27 | 1.18 | 3.33 | 450 | 147 | -29.4 |
K-5 | 69.75 | 23.96 | 91.16 | 450 | 131 | -28.3 |
Table 2
Gas yield and methane carbon isotopic compositions in gold tube pyrolysis experiments of kerogen from the Middle Devonian Guanwushan Formation source rocks in Northwestern Sichuan Basin"
模拟 温度/℃ | *EqVRo/% | 气体产率/(mL·g-1) | 干燥系数/% | δ13C1/‰ | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
CH4 | C2H6 | C3H8 | iC4 | nC4 | iC5 | nC5 | C2-5 | C1-5 | ||||
384 | 1.10 | 10.91 | 4.81 | 1.83 | 0.37 | 0.31 | 0.08 | 0.03 | 9.17 | 23.55 | 46.33 | -44.4 |
408 | 1.32 | 33.19 | 11.54 | 4.07 | 0.54 | 0.64 | 0.15 | 0.09 | 17.03 | 50.22 | 66.09 | -43.0 |
432 | 1.58 | 61.55 | 15.21 | 4.23 | 0.73 | 0.46 | 0.21 | 0.04 | 20.87 | 82.43 | 74.67 | -40.2 |
456 | 1.87 | 95.65 | 13.98 | 1.85 | 0.42 | 0.12 | 0.04 | — | 16.41 | 112.06 | 85.36 | -36.9 |
480 | 2.20 | 134.03 | 7.74 | 0.26 | 0.03 | 0.01 | 0.01 | — | 8.03 | 142.06 | 94.35 | -34.6 |
504 | 2.54 | 165.37 | 1.66 | 0.05 | — | — | — | — | 1.71 | 167.07 | 98.98 | -32.6 |
528 | 2.87 | 188.98 | 0.50 | 0.01 | — | — | — | — | 0.52 | 189.50 | 99.73 | -31.7 |
552 | 3.15 | 208.35 | 0.34 | 0.01 | — | — | — | — | 0.35 | 208.70 | 99.83 | -30.3 |
576 | 3.39 | 216.41 | 0.30 | — | — | — | — | — | 0.31 | 216.72 | 99.86 | -29.4 |
600 | 3.58 | 219.60 | 0.29 | — | — | — | — | — | 0.29 | 219.90 | 99.86 | -28.8 |
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