A Temperature-Sensitive Polymeric Rheology Modifier Used in Water-Based Drilling Fluid for Deepwater Drilling
Abstract
:1. Introduction
2. Results and Discussion
2.1. Characterization of PNBAM
2.1.1. FT-IR
2.1.2. H-NMR Spectra
2.1.3. TGA
2.2. Performance of PNBAM
2.2.1. Rheological Performance of PNBAM
2.2.2. Temperature Resistance Analysis
2.2.3. Salt and Calcium Resistance Analysis
2.2.4. Performance of Drilling Fluid System
2.3. Mechanism Study
2.3.1. Influencing Factors of LCST
2.3.2. Particle Size Analysis
2.3.3. Zeta Potential Analysis
2.3.4. Mechanism Analysis
3. Conclusions
4. Materials and Methods
4.1. Materials
4.2. Experimental Methods
4.2.1. Synthesis of Rheology Modifier PNBAM
4.2.2. Characterization
- FT-IR
- 2.
- TGA
- 3.
- 1H-NMR spectra
4.2.3. Performance Evaluation
- Low temperature rheological performance tests
- 2.
- Temperature resistance tests
- 3.
- Salt and calcium resistance tests
- 4.
- Drilling fluid system tests
4.2.4. Mechanism Analysis
- LCST
- 2.
- Effect of PNBAM concentration on LCST
- 3.
- Effect of salt concentration on LCST
- 4.
- Particle size
- 5.
- Zeta potential
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Conflicts of Interest
References
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Parameter Ratios | BF | BF + 0.2 wt% XC | BF + 0.2 wt% PNABAM |
---|---|---|---|
AV4°C:AV25°C | 2.23 | 1.72 | 1.35 |
AV4°C:AV65°C | 4.75 | 3.31 | 2.25 |
PV4°C:PV25°C | 2.14 | 1.77 | 1.22 |
PV4°C:PV65°C | 5.00 | 3.20 | 2.44 |
YP4°C:YP25°C | 2.67 | 1.57 | 2.5 |
YP4°C:YP65°C | 4.00 | 3.67 | 1.67 |
Conditions | Density/g/cm3 | AV/mPa·s | PV/mPa·s | YP/Pa | G′/G″Pa | FLAPI/mL | FLHTHP/mL |
---|---|---|---|---|---|---|---|
Before ageing | 1.5 | 45 | 36 | 9 | 8/11 | 4 | - |
After 120 °C/16 h ageing | 1.5 | 62 | 44 | 18 | 3/8 | 4.4 | 10.4 |
Parameter Ratios | WBDF-1 | WBDF-2 |
---|---|---|
AV4°C:AV25°C | 1.36 | 1.27 |
AV4°C:AV65°C | 1.93 | 1.81 |
PV4°C:PV25°C | 1.40 | 1.19 |
PV4°C:PV65°C | 1.92 | 1.68 |
YP4°C:YP25°C | 1.14 | 1.42 |
YP4°C:YP65°C | 2.00 | 2.06 |
Temperature/°C | Particle Size | Particle Size Distribution Graph |
---|---|---|
25 | D10 = 177 nm D50 = 255 nm Dave = 337.4 nm | |
30 | D10 = 205 nm D50 = 648 nm Dave = 593.8 nm | |
35 | D10 = 1050 nm D50 = 1330 nm Dave = 1241 nm |
Component | Additions |
---|---|
water | 400 mL |
bentonite | 16 g |
Na2CO3 | 1.2 g |
Component | Function | Mass Fraction/wt% | |
---|---|---|---|
WBDF-1 | WBDF-2 | ||
bentonite | filtrate reducer and viscosifier | 4 | 4 |
PNBAM | rheology modifier | 0 | 0.2 |
XC | viscosifier | 0.2 | 0 |
PAC-LV | filtrate reducer | 1.5 | 1.5 |
AP-1 | shale inhibitor | 1 | 1 |
Methyl oleate | lubricants | 2 | 2 |
NaCl | hydrate inhibitor | 20 | 20 |
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Wang, Z.; Sun, J.; Zhang, K.; Lv, K.; Huang, X.; Wang, J.; Wang, R.; Meng, X. A Temperature-Sensitive Polymeric Rheology Modifier Used in Water-Based Drilling Fluid for Deepwater Drilling. Gels 2022, 8, 338. https://doi.org/10.3390/gels8060338
Wang Z, Sun J, Zhang K, Lv K, Huang X, Wang J, Wang R, Meng X. A Temperature-Sensitive Polymeric Rheology Modifier Used in Water-Based Drilling Fluid for Deepwater Drilling. Gels. 2022; 8(6):338. https://doi.org/10.3390/gels8060338
Chicago/Turabian StyleWang, Zhongyi, Jinsheng Sun, Kun Zhang, Kaihe Lv, Xianbin Huang, Jintang Wang, Ren Wang, and Xu Meng. 2022. "A Temperature-Sensitive Polymeric Rheology Modifier Used in Water-Based Drilling Fluid for Deepwater Drilling" Gels 8, no. 6: 338. https://doi.org/10.3390/gels8060338