Gas Content Evaluation of Coalbed Methane Reservoir in the Fukang Area of Southern Junggar Basin, Northwest China by Multiple Geophysical Logging Methods
Abstract
:1. Introduction
2. Geological Settings
2.1. Structural Settings
2.2. Stratigraphic Characteristics
3. Methodology
3.1. Kim Method with Proximate Analysis Data
3.2. Langmuir Method
3.3. Well Logging Method
4. Results and Discussion
4.1. Gas Content Distribution
4.2. Geological Factors Affecting Gas Content
4.2.1. Geological Structure Controls
4.2.2. Coal Thickness and Burial Depth
4.2.3. Coal Metamorphism and Roof Lithology
4.3. Geological Controlling Scenarios of Gas Content
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Method | Name | Suitable Conditions | Specific Model |
---|---|---|---|
Statistical analysis method | Wang Z.W., 2010 | ||
Pan H.P., 1998 | |||
Fu X.H., 2009 | |||
Langmuir equation method | Hawkins J.M., 1992 | ||
If lack of Langmuir experiment data | |||
Conventional ash content measurement method | Kim A.G., 1977 | The maximum pressure is 930 psi | |
If is assumed to equal the hydrostatic head | |||
Assuming the pressure is homogeneous | |||
Mavor M.J., 1995 | |||
Mullen M.J., 1990 |
Well | Seam Number | Depth (m) | (%) | Measured (cm3/g) | Predicted QP (cm3/g) | (%) |
---|---|---|---|---|---|---|
C84 | 43 | 1165.6 | 71.5 | 11.65 | 11.03 | 5.32 |
1173.6 | 9.37 | 11.05 | 17.93 | |||
C131 | 42 | 989 | 45.1 | 8.63 | 7.16 | 17.03 |
43 | 1024.3 | 66.6 | 11.3 | 14.7 | 30.09 | |
1036.5 | 12.8 | 12.09 | 5.55 | |||
45-1 | 1076.5 | 41.5 | 9.65 | 7.56 | 21.86 | |
45-2 | 1122.9 | 47.1 | 9.13 | 9.01 | 1.31 | |
C161 | 43 | 1360.6 | 63.3 | 15.61 | 13.5 | 13.52 |
1377.6 | 15.25 | 13.57 | 11.02 | |||
45-1 | 1447.1 | 68.6 | 15.38 | 14.4 | 6.37 |
Well | Predicted Coalbed Gas Content, cm3/g | Samples | Correlation Coefficient | Residual Error | F |
---|---|---|---|---|---|
C161 | 12 | 0.94 | 1.50 | 789.72 | |
C153 | 9 | 0.96 | 0.18 | 2163.11 | |
C131 | 21 | 0.91 | 0.08 | 3231.81 | |
C84 | 6 | 0.98 | 0.02 | 13714.9 |
No. | Well | Measured QM | Predicted QP | Predicted QP | ||
---|---|---|---|---|---|---|
(cm3/ g) | 2 Variables | 5 Variables | 2 Variables | 5 Variables | ||
1 | C51 | 6.00 | 5.13 | 4.74 | 14.50 | 20.99 |
2 | C52 | 14.89 | 14.86 | 15.31 | 0.18 | 2.82 |
3 | C53 | 12.31 | 10.11 | 10.82 | 17.84 | 12.09 |
4 | C54 | 4.22 | 3.30 | 3.70 | 21.80 | 12.23 |
5 | C81 | 12.77 | 13.58 | 13.81 | 6.33 | 8.18 |
6 | C82 | 14.13 | 14.39 | 14.74 | 1.81 | 4.34 |
7 | C83 | 14.90 | 14.71 | 15.11 | 1.30 | 1.41 |
8 | C84 | 13.45 | 13.72 | 14.05 | 1.99 | 4.48 |
9 | C06V | 13.67 | 13.89 | 14.22 | 1.58 | 4.04 |
10 | C111 | 13.02 | 13.91 | 14.16 | 6.81 | 8.72 |
11 | C112 | 13.63 | 14.41 | 14.65 | 5.75 | 7.49 |
12 | C01 | 14.19 | 14.21 | 14.62 | 0.16 | 3.02 |
13 | C02 | 13.29 | 13.73 | 14.09 | 3.29 | 5.99 |
14 | C03 | 15.37 | 14.69 | 15.24 | 4.45 | 0.86 |
15 | C04 | 14.97 | 14.70 | 15.20 | 1.78 | 1.56 |
16 | C05 | 14.66 | 14.54 | 15.04 | 0.79 | 2.59 |
17 | C1H | 15.69 | 14.17 | 14.85 | 9.69 | 5.34 |
18 | C13X | 14.34 | 14.56 | 15.02 | 1.53 | 4.72 |
19 | C131 | 13.95 | 14.23 | 14.68 | 1.99 | 5.26 |
20 | C132 | 8.04 | 8.61 | 8.79 | 7.04 | 9.28 |
21 | C133 | 12.99 | 13.40 | 13.79 | 3.13 | 6.15 |
22 | C151 | 14.39 | 13.86 | 14.36 | 3.69 | 0.18 |
23 | C152 | 13.95 | 14.05 | 14.44 | 0.68 | 3.48 |
24 | C153 | 13.92 | 14.22 | 14.57 | 2.16 | 4.69 |
25 | C154 | 13.48 | 14.07 | 14.37 | 4.36 | 6.63 |
26 | C161 | 14.03 | 14.05 | 14.47 | 0.13 | 3.13 |
27 | C162 | 13.87 | 14.22 | 14.66 | 2.55 | 5.68 |
28 | C164 | 14.68 | 14.71 | 15.23 | 0.21 | 3.75 |
29 | C165 | 16.26 | 14.67 | 15.37 | 9.76 | 5.47 |
30 | C166 | 12.53 | 12.72 | 13.18 | 1.53 | 5.21 |
Well | Seam Number | Structural Type | Burial Depth (m) | Gas Content (Average) (m3/t) |
---|---|---|---|---|
C84 | 43 | wing | 1161–1178 | 9.37–13 (10.25) |
C03 | 43 | axis | 888–910 | 8.46–15.54 (13.56) |
C03 | 45-1 | axis | 968–986 | 8.43–14.17 (10.83) |
C13 | 43 | axis | 1020–1038 | 11.3–15.88 (13.27) |
C13 | 45-1 | axis | 1072–1081 | 9.65 |
C13 | 45-2 | axis | 1122–1125 | 9.13–10.09 (9.61) |
C16 | 43 | axis | 1357–1384 | 10.2–16.25 (14.4) |
C16 | 45-1 | axis | 1406–1413 | 15.78–16.18 (16.08) |
K1 | 43 | wing | 851–869 | 6.7–10.82 (8.26) |
K1 | 45-2 | wing | 948–971 | 6.66–11.21 (7.98) |
K2 | 43 | wing | 469–486 | 6.93–9.09 (7.8) |
K6 | 45-2 | wing | 1050–1070 | 7.56–8.14 (7.8) |
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Ge, X.; Liu, D.; Cai, Y.; Wang, Y. Gas Content Evaluation of Coalbed Methane Reservoir in the Fukang Area of Southern Junggar Basin, Northwest China by Multiple Geophysical Logging Methods. Energies 2018, 11, 1867. https://doi.org/10.3390/en11071867
Ge X, Liu D, Cai Y, Wang Y. Gas Content Evaluation of Coalbed Methane Reservoir in the Fukang Area of Southern Junggar Basin, Northwest China by Multiple Geophysical Logging Methods. Energies. 2018; 11(7):1867. https://doi.org/10.3390/en11071867
Chicago/Turabian StyleGe, Xu, Dameng Liu, Yidong Cai, and Yingjin Wang. 2018. "Gas Content Evaluation of Coalbed Methane Reservoir in the Fukang Area of Southern Junggar Basin, Northwest China by Multiple Geophysical Logging Methods" Energies 11, no. 7: 1867. https://doi.org/10.3390/en11071867