Pore Structure Characteristics and Permeability Stress Sensitivity of Jurassic Continental Shale of Dongyuemiao Member of Ziliujing Formation, Fuxing Area, Eastern Sichuan Basin
Abstract
:1. Introduction
2. Geological Setting
3. Methodology
3.1. Samples
3.2. Analytical Methods
4. Shale Reservoir Characteristics
4.1. Geochemical Characteristics
4.2. Petrological Characteristics
4.3. Reservoir Space Characteristics
4.3.1. Porosity and Permeability Distribution
4.3.2. Scanning Electron Microscopy
4.3.3. Pore Structure Characterization
4.3.4. Factors Influencing Reservoirs Properties
5. Stress Sensitivity Analysis of Continental Shale Permeability
5.1. Porosity–Permeability Characteristics of Continental Shale under Overburden Pressure
5.2. Stress Sensitivity Parameters of Permeability of Continental Shale Reservoir
5.3. Analysis of Influencing Factors on Permeability Stress Sensitivity
5.3.1. Effect of Petrological Characteristics on Permeability Stress Sensitivity
5.3.2. Effect of TOC Content on Permeability Stress Sensitivity
5.3.3. Effect of Pore Type on Permeability Stress Sensitivity
6. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Stratum | Lithologic Characters | Sample Depth (m) | Sample Number | ||
---|---|---|---|---|---|
Member | Sub- Member | Thin Layer | |||
Dongyuemiao Member | Dong1 | 7 | Dark gray and gray–black massive mudstone | 2751.0~2770.0 | 7 |
6 | 2770.0~2778.0 | 4 | |||
Dong2 | 5 | Gray–black argillaceous limestone | 2778.0~2784.5 | 5 | |
Dong3 | 4 | Gray–black shale intercalated shell limestone | 2784.5~2791.0 | 7 | |
3 | 2791.0~2797.5 | 5 | |||
2 | 2797.5~2806.0 | 6 | |||
1 | 2806.0~2812.5 | 4 |
Formation | Depth (m) | S1 (mg/g) | S2 (mg/g) | S1 + S2 (mg/g) | TOC (wt.%) | Tmax (°C) | HI |
---|---|---|---|---|---|---|---|
Dong3 | 2763.82 | 0.43 | 0.64 | 1.07 | 1.17 | 480 | 55 |
2765.68 | 0.51 | 0.69 | 1.2 | 1.14 | 480 | 61 | |
2771.24 | 0.7 | 0.84 | 1.54 | 1.35 | 472 | 62 | |
Dong2 | 2778.94 | 0.43 | 0.76 | 1.19 | 1.55 | 478 | 49 |
Dong1 | 2801.68 | 0.68 | 1.25 | 1.93 | 2.48 | 480 | 50 |
2802.56 | 0.59 | 0.86 | 1.45 | 1.74 | 478 | 49 | |
2835.69 | 0.24 | 0.15 | 0.39 | 0.68 | 464 | 22 | |
2839.7 | 0.94 | 1.34 | 2.28 | 3.19 | 487 | 42 | |
2847.41 | 0.5 | 0.81 | 1.31 | 1.71 | 492 | 47 | |
2853.49 | 0.35 | 0.44 | 0.79 | 0.71 | 493 | 62 | |
2856.57 | 0.45 | 0.71 | 1.16 | 1.74 | 494 | 41 | |
2857.05 | 0.27 | 0.62 | 0.89 | 1.58 | 476 | 39 | |
2857.2 | 0.25 | 0.46 | 0.71 | 1.22 | 494 | 38 | |
2857.83 | 0.33 | 0.56 | 0.89 | 1.63 | 493 | 34 | |
2857.94 | 0.37 | 0.7 | 1.07 | 1.96 | 495 | 36 | |
2858 | 0.46 | 0.71 | 1.17 | 2.05 | 492 | 35 | |
2864.05 | 0.42 | 0.75 | 1.17 | 1.89 | 494 | 40 |
Sample | Depth (m) | Lithofacies | TOC (wt.%) | Pore Volume | |||
---|---|---|---|---|---|---|---|
Micropore (10−3 cm3/g) | Mesopore (10−3 cm3/g) | Macropore (10−3 cm3/g) | Total Pore (10−3 cm3/g) | ||||
F-7-2 | 2760.05 | Silica-rich argillaceous shale | 0.59 | 0.8449 | 11.3092 | 3.2710 | 15.4250 |
F-6-1 | 2770.89 | Silica-rich argillaceous shale | 0.76 | 1.2198 | 12.6972 | 3.4071 | 17.3241 |
F-5-2 | 2779.9 | Mixed shale | 1.00 | 0.7447 | 8.5013 | 2.0862 | 11.3321 |
F-4-2 | 2787.96 | Argillaceous shale | 1.46 | 1.4264 | 11.0236 | 8.0161 | 20.4661 |
F-3-5 | 2791.45 | Mixed argillaceous shale | 1.70 | 1.7314 | 10.2266 | 5.9013 | 17.8593 |
F-2-4 | 2800.51 | Mixed argillaceous shale | 1.49 | 0.8956 | 8.3810 | 5.4010 | 14.6776 |
F-1-2 | 2807.35 | Silica-rich argillaceous shale | 1.04 | 0.7361 | 6.7610 | 3.7734 | 11.2705 |
Sample | Depth (m) | Length (cm) | Diameter (cm) | TOC (wt.%) | Mineralogical Composition (%) | |||
---|---|---|---|---|---|---|---|---|
Clay | Quartz | Feldspar | Calcite | |||||
F-27 | 2765.71 | 5.719 | 2.453 | 1.26 | 61.35 | 28 | 3.62 | 5.85 |
F-21 | 2782.01 | 5.880 | 2.462 | 1.36 | 25.66 | 11.44 | 0 | 61.86 |
F-16 | 2787.71 | 4.620 | 2.457 | 1.46 | 80.95 | 13.82 | 4.06 | 1.16 |
F-4 | 2805.84 | 5.792 | 2.459 | 1.59 | 69.08 | 21.58 | 5.55 | 3.78 |
F-33 | 2807.35 | 5.781 | 2.463 | 1.04 | 52.09 | 20.86 | 5.59 | 21.46 |
F-3 | 2809.15 | 5.875 | 2.459 | 1.53 | 69.31 | 20.68 | 4.05 | 6.14 |
Sample | Depth (m) | (Porosity (%))/(Permeability (×100 mD)) | |||||
---|---|---|---|---|---|---|---|
Confining Pressures (MPa) | |||||||
5 | 10 | 15 | 20 | 25 | 30 | ||
F-27 | 2765.71 | 1.244/0.3353 | 0.852/0.1368 | 0.715/0.0769 | 0.615/0.0512 | 0.552/0.0408 | 0.493/0.0298 |
F-21 | 2782.01 | 1.111/0.2905 | 0.730/0.1459 | 0.586/0.0709 | 0.492/0.0559 | 0.498/0.0452 | 0.427/0.0348 |
F-16 | 2787.71 | 3.244/2.1014 | 2.582/0.8597 | 1.836/0.4431 | 2.197/0.3011 | 2.004/0.2232 | 1.664/0.1742 |
F-4 | 2805.84 | 1.214/0.2474 | 0.898/0.1229 | 0.804/0.0689 | 0.720/0.0456 | 0.674/0.0283 | 0.633/0.0212 |
F-33 | 2807.35 | 0.661/0.8486 | 0.479/0.4054 | 0.371/0.2561 | 0.319/0.1875 | 0.323/0.1433 | 0.295/0.1134 |
F-3 | 2809.15 | 1.596/4.3607 | 1.185/1.7499 | 1.103/0.8590 | 1.029/0.5517 | 0.928/0.3688 | 0.890/0.2584 |
Sample | Depth (m) | (Permeability Damage Rate (%))/(Stress Sensitivity Coefficient (MPa−1)) | |||||
---|---|---|---|---|---|---|---|
Confining Pressures (MPa) | |||||||
5 | 10 | 15 | 20 | 25 | 30 | ||
F-27 | 2765.71 | 0.042/0.1381 | 0.609/0.0662 | 0.780/0.0235 | 0.854/0.0100 | 0.883/0.0060 | 0.915/0.0046 |
F-21 | 2782.01 | 0.063/0.1365 | 0.529/0.0674 | 0.771/0.0259 | 0.820/0.0081 | 0.854/0.0070 | 0.888/0.0052 |
F-16 | 2787.71 | 0.053/0.1466 | 0.613/0.0672 | 0.800/0.0234 | 0.864/0.0097 | 0.899/0.0056 | 0.922/0.0029 |
F-4 | 2805.84 | 0.202/0.1039 | 0.603/0.0548 | 0.778/0.0240 | 0.853/0.0131 | 0.909/0.0077 | 0.932/0.0052 |
F-33 | 2807.35 | 0.047/0.1118 | 0.544/0.0613 | 0.712/0.0236 | 0.789/0.0126 | 0.839/0.0083 | 0.873/0.0064 |
F-3 | 2809.15 | 0.135/0.0436 | 0.653/0.0175 | 0.830/0.0086 | 0.891/0.0055 | 0.927/0.0037 | 0.949/0.0026 |
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Yang, R.; Wang, F.; Yun, N.; Zeng, H.; Han, Y.; Hu, X.; Diao, N. Pore Structure Characteristics and Permeability Stress Sensitivity of Jurassic Continental Shale of Dongyuemiao Member of Ziliujing Formation, Fuxing Area, Eastern Sichuan Basin. Minerals 2022, 12, 1492. https://doi.org/10.3390/min12121492
Yang R, Wang F, Yun N, Zeng H, Han Y, Hu X, Diao N. Pore Structure Characteristics and Permeability Stress Sensitivity of Jurassic Continental Shale of Dongyuemiao Member of Ziliujing Formation, Fuxing Area, Eastern Sichuan Basin. Minerals. 2022; 12(12):1492. https://doi.org/10.3390/min12121492
Chicago/Turabian StyleYang, Rongyan, Furong Wang, Nianhan Yun, Hongbin Zeng, Yuanjia Han, Xing Hu, and Ninglin Diao. 2022. "Pore Structure Characteristics and Permeability Stress Sensitivity of Jurassic Continental Shale of Dongyuemiao Member of Ziliujing Formation, Fuxing Area, Eastern Sichuan Basin" Minerals 12, no. 12: 1492. https://doi.org/10.3390/min12121492