Study on Plugging Microfracture by Using High-Temperature Emulsified Bitumen
Abstract
:1. Introduction
2. Experimental
2.1. General Procedure for Preparing High-Temperature Emulsified Bitumen (HTEB)
2.2. General Procedure for Obtaining Drilling Fluid
2.3. General Method for Obtaining Rheological Measurements of Drilling Mud
2.4. General Method for Obtaining Static Filtration
2.5. General Procedure for Obtaining Lubrication
2.6. General Procedure for Obtaining Core Inflation Inhibitory
3. Results and Discussion
3.1. The Microfracture Plugging Size Analysis
3.2. The Viscosity of Drilling Mud with Different Additives
3.3. The Static Filtration of Drilling Fluid with Different Additives
3.4. The Lubricating Properties of Drilling Fluid with Different Additives
3.5. Comparative Analysis of Microscopic Morphology after Plugging
3.6. The Core Expansion Properties of Drilling Fluid with Different Additives
4. Conclusions
- (1)
- When the content of WEP reaches 4%, it can effectively raise the softening point of the asphalt to 136 °C, which meets the specification requirement (120 °C). Between the nano and micro levels, the size of HTEB can comprehensively fill the microcracks, which indicates that HTEB can be used for drilling fluid modification.
- (2)
- The addition of different additives will increase the viscosity of the mud, thereby reducing the rheology of the mud, among which the influence of HTEB is the smallest, with almost no difference; at the same time, this degree of thickening can achieve a gradual reduction in the static filtration and ensure the stability of the drilling fluid performance.
- (3)
- The addition of different additives can effectively reduce the extreme pressure lubrication coefficient and viscous coefficient. Among them, the WEP in HTEB forms a kind of three-dimensional network structure to give a strong adhesion ability, and the emulsified asphalt substrate in HTEB has lubricity, meaning that the HTEB has the best lubricating performance.
- (4)
- Compared with the drilling fluids of FT-3000 and SAS, HTEB forms a high-quality mud cake, which has the advantages of a dense, thin, and smooth surface; the drilling fluid with HTEB can well fill the microcracks and inhibit the core expansion coefficient rate.
- (5)
- With the increase in dosage, the drilling fluid with HTEB always shows excellent performance, and the optimal dosage is 4% when in combination with economic cost considerations.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
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Additives | Treatment | AV /mPa·s | PV /mPa·s | Yp /Pa | Cutting/Pa | |
---|---|---|---|---|---|---|
Beginning | Final | |||||
Blank | a | 31 | 28 | 1.5 | 1.5 | 1.5 |
b | 20 | 17 | 3 | 1.5 | 2 | |
SAS | a | 55 | 53 | 2 | 2 | 2 |
b | 32.5 | 28 | 2.5 | 2.5 | 2.5 | |
FT-3000 | a | 43.5 | 42 | 1.5 | 1.5 | 1.5 |
b | 24 | 20 | 1.5 | 1.5 | 1.5 | |
HTEB | a | 37 | 36 | 1 | 1 | 1 |
b | 24 | 20 | 1.5 | 1.5 | 1.5 |
Additives | Static Filtration/L | |
---|---|---|
Blank | - | 0.0258 |
SAS | 3% | 0.0234 |
FT-3000 | 3% | 0.0218 |
HTEB | 2% | 0.0221 |
3% | 0.0188 | |
4% | 0.0176 | |
5% | 0.0172 |
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Yang, L.; Chen, X.; Gu, L.; Chen, Y.; Shi, S. Study on Plugging Microfracture by Using High-Temperature Emulsified Bitumen. Coatings 2024, 14, 387. https://doi.org/10.3390/coatings14040387
Yang L, Chen X, Gu L, Chen Y, Shi S. Study on Plugging Microfracture by Using High-Temperature Emulsified Bitumen. Coatings. 2024; 14(4):387. https://doi.org/10.3390/coatings14040387
Chicago/Turabian StyleYang, Liang, **ang Chen, Linhao Gu, Yan Chen, and Shuang Shi. 2024. "Study on Plugging Microfracture by Using High-Temperature Emulsified Bitumen" Coatings 14, no. 4: 387. https://doi.org/10.3390/coatings14040387