Characteristics of Micropore-Throat Structures in Tight Oil Reservoirs: A Case Study of the Jiufotang Formation in the Houhe Region, NE China
Abstract
:1. Introduction
2. Geological Setting
3. Materials and Methods
3.1. Sample Information
3.2. Testing Methods
3.2.1. Petrological Analysis
3.2.2. Thin Sections, Dyed Thin Sections, and SEM Analyses
3.2.3. Analysis of Routine Physical Properties
3.2.4. CT Analysis
3.2.5. High-Pressure Mercury Intrusion Analysis
4. Results
4.1. Reservoir Petrology
4.2. Physical Characteristics of the Reservoir
4.3. Types of Reservoir Pore Spaces
4.4. Characterization of Pore-Throat Structures Based on Micron-Scale CT Scanning
4.5. Pore-Throat Structure Analysis Based on High-Pressure Mercury Intrusion Tests
5. Discussion
5.1. Classification of Pore-Throat Structures in the Tight Oil Reservoir
5.2. Analysis of Factors Controlling Tight Oil Reservoirs
5.2.1. Depositional Environment
5.2.2. Diagenesis
5.2.3. Tectonic Activity
6. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Parameters | φ (%) | K (mD) | Pd (MPa) | P50 (MPa) | VG | SHgmax (%) | Sk | R (μm) | Cn |
---|---|---|---|---|---|---|---|---|---|
φ (%) | 1.000 | 0.856 | −0.549 | −0.592 | 0.776 | 0.570 | 0.554 | 0.247 | 0.026 |
K (mD) | 0.856 | 1.000 | −0.229 | −0.527 | 0.714 | 0.730 | 0.725 | 0.288 | −0.026 |
Pd (MPa) | −0.549 | −0.229 | 1.000 | 0.353 | −0.489 | −0.228 | 0.188 | −0.506 | −0.431 |
P50 (MPa) | −0.592 | −0.527 | 0.353 | 1.000 | −0.535 | −0.812 | −0.606 | 0.212 | 0.392 |
VG | 0.776 | 0.714 | −0.489 | −0.535 | 1.000 | 0.649 | 0.563 | 0.170 | −0.142 |
SHgmax (%) | 0.570 | 0.730 | −0.228 | −0.812 | 0.649 | 1.000 | 0.630 | 0.042 | −0.270 |
Sk | 0.554 | 0.725 | 0.188 | −0.606 | 0.563 | 0.630 | 1.000 | −0.369 | −0.614 |
R (μm) | 0.247 | 0.288 | −0.506 | 0.212 | 0.170 | 0.042 | −0.369 | 1.000 | 0.924 |
Cn | 0.026 | −0.026 | −0.431 | 0.392 | −0.142 | −0.270 | −0.614 | 0.924 | 1.000 |
Type | φ (%) | K (mD) | VG | Sk | R (μm) |
---|---|---|---|---|---|
I | (9.6–23.2)/12.6 | (0.74–28.3)/2.81 | (0.69–1.72)/0.82 | (0.89–4.86)/2.44 | (2.08–56.50)/12.75 |
II | (6.4–12.3)/8.75 | (0.09–4.12)/0.30 | (0.91–2.06)/1.19 | (0.61–2.11)/1.31 | (0.60–23.41)/7.63 |
III | (2.83–9.91)/3.80 | (0.016–3.27)/0.08 | (1.45–3.47)/2.27 | (0.43–1.32)/0.87 | (0.26–12.92)/3.86 |
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Zhang, G.; Ma, C. Characteristics of Micropore-Throat Structures in Tight Oil Reservoirs: A Case Study of the Jiufotang Formation in the Houhe Region, NE China. Minerals 2024, 14, 918. https://doi.org/10.3390/min14090918
Zhang G, Ma C. Characteristics of Micropore-Throat Structures in Tight Oil Reservoirs: A Case Study of the Jiufotang Formation in the Houhe Region, NE China. Minerals. 2024; 14(9):918. https://doi.org/10.3390/min14090918
Chicago/Turabian StyleZhang, Guolong, and Chenglong Ma. 2024. "Characteristics of Micropore-Throat Structures in Tight Oil Reservoirs: A Case Study of the Jiufotang Formation in the Houhe Region, NE China" Minerals 14, no. 9: 918. https://doi.org/10.3390/min14090918