Reservoir Petrofacies Predicted Using Logs Data: A Study of Shale Oil from Seven Members of the Upper Triassic Yanchang Formation, Ordos Basin, China
Abstract
:1. Introduction
2. Geological Background
3. Materials and Methods
3.1. Materials and Experiments
3.2. The Multi-Resolution Graph-Based Clustering (MRGC) Algorithms
4. Results
4.1. Petrofacies
4.2. Electrofacies
4.2.1. Electrofacies from Interpreted Logs
4.2.2. Electrofacies from Raw Well Logs
5. Discussion
6. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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NO. | POR (%) | TOC (%) | BIbm (%) | PF | NO. | POR (%) | TOC (%) | BIbm (%) | PF |
---|---|---|---|---|---|---|---|---|---|
1 | 1.25 | 1.44 | 36.28 | PF D | 25 | 1.86 | 3.59 | 29.43 | PF D |
2 | 1.77 | 3.21 | 36.67 | PF D | 26 | 2.33 | 3.16 | 29.87 | PF D |
3 | 0.68 | 3.45 | 28.81 | PF D | 27 | 1.79 | 3.87 | 24.82 | PF D |
4 | 0.70 | 2.84 | 29.29 | PF D | 28 | 1.40 | 2.68 | 24.33 | PF D |
5 | 0.96 | 1.48 | 43.85 | PF D | 29 | 0.39 | 2.12 | 20.89 | PF D |
6 | 2.03 | 3.75 | 26.75 | PF B | 30 | 1.15 | 0.88 | 50.67 | PF D |
7 | 1.47 | 4.12 | 24.21 | PF B | 31 | 1.15 | 0.88 | 32.503 | PF C |
8 | 1.87 | 4.77 | 25.21 | PF D | 32 | 1.40 | 4.89 | 33.917 | PF C |
9 | 2.08 | 4.43 | 34.12 | PF B | 33 | 1.80 | 6.11 | 26.619 | PF C |
10 | 2.58 | 2.89 | 34.38 | PF B | 34 | 1.10 | 5.22 | 22.703 | PF B |
11 | 1.61 | 4.93 | 27.19 | PF C | 35 | 1.70 | 5.16 | 30.889 | PF B |
12 | 2.12 | 4.55 | 25.73 | PF B | 36 | 1.90 | 7.26 | 24.224 | PF C |
13 | 1.61 | 4.18 | 32.19 | PF B | 37 | 0.90 | 7.93 | 21.579 | PF B |
14 | 1.05 | 3.34 | 30.78 | PF D | 38 | 1.90 | 3.11 | 38.167 | PF D |
15 | 2.24 | 2.9 | 25.77 | PF A | 39 | 1.40 | 6.19 | 10.254 | PF C |
16 | 1.82 | 3.23 | 30.66 | PF A | 40 | 3.70 | 9.19 | 38.946 | PF B |
17 | 1.91 | 4.49 | 27.82 | PF A | 41 | 1.40 | 7.87 | 23.333 | PF B |
18 | 1.56 | 5.61 | 31.22 | PF B | 42 | 2.10 | 6.38 | 28.549 | PF B |
19 | 2.12 | 5.19 | 27.84 | PF C | 43 | 1.50 | 5.2 | 29.125 | PF D |
20 | 1.87 | 3.74 | 25.5 | PF C | 44 | 2.00 | 6.7 | 22.759 | PF C |
21 | 2.19 | 4.92 | 21.33 | PF C | 45 | 1.60 | 6.62 | 17.123 | PF B |
22 | 1.48 | 5.38 | 28.31 | PF B | 46 | 2.60 | 7.03 | 26.764 | PF B |
23 | 1.56 | 5.97 | 37.2 | PF C | 47 | 1.50 | 6.13 | 33.026 | PF D |
24 | 1.95 | 2.29 | 36.84 | PF C | 48 | 1.70 | 3.2 | 26.964 | PF D |
Petrofacies | Characterization | SEM | XRD |
---|---|---|---|
PF A | High porosity, high TOC, and high brittleness index; clay mineral interlayer pores and fractures, and interparticle pores. | ||
PF B | Median porosity, median TOC, and high brittleness index; interparticle pores and intraparticle pores. | ||
PF C | Low porosity, median TOC, and low brittleness index; clay mineral interlayer pores and fractures, and sparsely developed interparticle and intraparticle pores. | ||
PF D | Ultra-low porosity, low TOC, and high brittleness index; clay mineral interlayer pores and fractures. |
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Meng, K.; Wang, M.; Zhang, S.; Xu, P.; Ji, Y.; Meng, C.; Zhan, J.; Yu, H. Reservoir Petrofacies Predicted Using Logs Data: A Study of Shale Oil from Seven Members of the Upper Triassic Yanchang Formation, Ordos Basin, China. Processes 2023, 11, 3131. https://doi.org/10.3390/pr11113131
Meng K, Wang M, Zhang S, Xu P, Ji Y, Meng C, Zhan J, Yu H. Reservoir Petrofacies Predicted Using Logs Data: A Study of Shale Oil from Seven Members of the Upper Triassic Yanchang Formation, Ordos Basin, China. Processes. 2023; 11(11):3131. https://doi.org/10.3390/pr11113131
Chicago/Turabian StyleMeng, Kun, Ming Wang, Shaohua Zhang, Pengye Xu, Yao Ji, Chaoyang Meng, Jie Zhan, and Hongyan Yu. 2023. "Reservoir Petrofacies Predicted Using Logs Data: A Study of Shale Oil from Seven Members of the Upper Triassic Yanchang Formation, Ordos Basin, China" Processes 11, no. 11: 3131. https://doi.org/10.3390/pr11113131