Pore Size Distribution Characterization by Joint Interpretation of MICP and NMR: A Case Study of Chang 7 Tight Sandstone in the Ordos Basin
Abstract
:1. Introduction
2. Materials and Methods
2.1. Geological Setting and Samples
2.2. MICP
2.3. NMR
3. Results
3.1. Petrology and Pore Characteristics
3.1.1. Petrology Characteristics
3.1.2. Pore Characteristics
3.2. MICP Curves and Parameters
3.3. NMR T2 Spectrum
4. Discussion
4.1. Comparison of Pore Volume and Size from MICP and NMR
4.1.1. Porosity
4.1.2. Pore and Pore Throat Size
4.2. Pore Size Distribution
4.2.1. Calibration of PSD
4.2.2. The PSD and PTD
4.3. The Difference between MICP-PTD and NMR-Derived PSD
4.3.1. The Pore Network Model
4.3.2. Difference of Pores and Throats
5. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Sample No. | So | Pc50 (MPa) | Pd (MPa) | rmax (μm) | Smax (%) | We (%) | PTR | φHg (%) | r2.5 (μm) | r25 (μm) | r75 (μm) |
---|---|---|---|---|---|---|---|---|---|---|---|
1 | 1.69 | 46.11 | 6.82 | 0.108 | 71.83 | 32.42 | 2.08 | 3.24 | 0.104 | 0.034 | 0.002 |
2 | 1.87 | 59.51 | 4.39 | 0.167 | 77.35 | 44.04 | 1.27 | 2.85 | 0.173 | 0.043 | 0.003 |
3 | 1.59 | 19.37 | 3.56 | 0.206 | 86.70 | 36.99 | 1.70 | 5.74 | 0.203 | 0.084 | 0.010 |
4 | 1.43 | 18.97 | 3.56 | 0.206 | 85.21 | 24.22 | 3.13 | 6.06 | 0.195 | 0.075 | 0.012 |
5 | 1.51 | 26.88 | 6.02 | 0.122 | 89.33 | 11.85 | 7.44 | 7.07 | 0.213 | 0.048 | 0.009 |
6 | 1.49 | 11.02 | 2.87 | 0.256 | 86.99 | 35.04 | 1.85 | 8.45 | 0.212 | 0.118 | 0.016 |
7 | 1.69 | 11.42 | 1.84 | 0.400 | 90.31 | 32.78 | 2.05 | 8.18 | 0.415 | 0.151 | 0.019 |
8 | 1.53 | 11.30 | 2.60 | 0.283 | 91.92 | 41.67 | 1.40 | 9.39 | 0.258 | 0.129 | 0.021 |
9 | 1.65 | 12.21 | 1.83 | 0.401 | 91.20 | 20.41 | 3.90 | 5.97 | 0.471 | 0.117 | 0.020 |
10 | 1.23 | 10.06 | 4.40 | 0.167 | 87.87 | 27.73 | 2.61 | 8.96 | 0.214 | 0.110 | 0.028 |
11 | 1.54 | 5.90 | 2.25 | 0.326 | 91.59 | 19.83 | 4.04 | 9.14 | 0.293 | 0.180 | 0.033 |
12 | 0.98 | 7.11 | 2.26 | 0.326 | 89.88 | 26.09 | 2.83 | 9.20 | 0.287 | 0.155 | 0.051 |
13 | 1.49 | 7.06 | 2.88 | 0.256 | 83.71 | 22.73 | 3.40 | 8.99 | 0.318 | 0.167 | 0.017 |
14 | 0.81 | 3.94 | 0.94 | 0.782 | 91.23 | 13.58 | 6.36 | 8.90 | 0.645 | 0.254 | 0.135 |
15 | 1.59 | 7.86 | 4.39 | 0.167 | 92.46 | 13.13 | 6.61 | 9.37 | 0.834 | 0.139 | 0.032 |
16 | 2.03 | 2.59 | 1.19 | 0.619 | 89.70 | 25.49 | 2.92 | 8.03 | 0.917 | 0.460 | 0.032 |
Sample No. | Sir* (%) | Sw* (%) | C (μm/ms) | R2.5 (μm) | R25 (μm) | R50 (μm) | R75 (μm) |
---|---|---|---|---|---|---|---|
1 | 67.99 | 32.01 | 0.027 | 0.151 | 0.037 | 0.022 | 0.013 |
2 | 58.57 | 41.43 | 0.047 | 0.068 | 0.025 | 0.016 | 0.010 |
3 | 56.80 | 43.20 | 0.034 | 0.153 | 0.053 | 0.029 | 0.017 |
4 | 56.47 | 43.53 | 0.024 | 0.491 | 0.096 | 0.040 | 0.021 |
5 | 63.85 | 36.15 | 0.006 | 0.826 | 0.261 | 0.090 | 0.034 |
6 | 53.02 | 46.98 | 0.027 | 0.525 | 0.077 | 0.038 | 0.019 |
7 | 58.87 | 41.13 | 0.019 | 0.954 | 0.123 | 0.046 | 0.023 |
8 | 58.37 | 41.63 | 0.011 | 0.630 | 0.221 | 0.084 | 0.030 |
9 | 40.80 | 59.20 | 0.027 | 1.019 | 0.175 | 0.066 | 0.026 |
10 | 42.26 | 57.74 | 0.015 | 1.318 | 0.177 | 0.064 | 0.028 |
11 | 52.47 | 47.53 | 0.009 | 1.184 | 0.308 | 0.092 | 0.032 |
12 | 55.57 | 44.43 | 0.014 | 1.224 | 0.229 | 0.085 | 0.038 |
13 | 39.60 | 60.40 | 0.017 | 1.347 | 0.310 | 0.083 | 0.034 |
14 | 44.94 | 55.06 | 0.012 | 1.680 | 0.381 | 0.122 | 0.038 |
15 | 26.83 | 73.17 | 0.024 | 0.954 | 0.306 | 0.069 | 0.024 |
16 | 15.06 | 84.94 | 0.057 | 3.414 | 0.419 | 0.128 | 0.032 |
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Li, C.; Liu, X.; You, F.; Wang, P.; Feng, X.; Hu, Z. Pore Size Distribution Characterization by Joint Interpretation of MICP and NMR: A Case Study of Chang 7 Tight Sandstone in the Ordos Basin. Processes 2022, 10, 1941. https://doi.org/10.3390/pr10101941
Li C, Liu X, You F, Wang P, Feng X, Hu Z. Pore Size Distribution Characterization by Joint Interpretation of MICP and NMR: A Case Study of Chang 7 Tight Sandstone in the Ordos Basin. Processes. 2022; 10(10):1941. https://doi.org/10.3390/pr10101941
Chicago/Turabian StyleLi, Chaozheng, Xiangbai Liu, Fuliang You, Peng Wang, Xinluo Feng, and Zhazha Hu. 2022. "Pore Size Distribution Characterization by Joint Interpretation of MICP and NMR: A Case Study of Chang 7 Tight Sandstone in the Ordos Basin" Processes 10, no. 10: 1941. https://doi.org/10.3390/pr10101941