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Title: Advanced Self-Healing Polymer-Cement Composites for Geothermal Wellbore Application at 300 °C

Abstract

Polymer-cement composites were formulated using two base cements and three polymers and evaluated as potential alternatives to conventional geothermal wellbore cementitious material. To mimic geothermal conditions these cement composites were cured at 300 °C and their mechanical properties, including compressive strength, Young modulus, shear bond strength to steel casing, and self-healing and re-adhering (to steel) capability were tested. To test thermal stability the samples were cured at 300 °C for up to 30 days followed by analysis of their mineralogy and chemical composition by X-ray diffraction spectroscopy (XRD), 13C NMR, and total organic carbon (TOC). These tests showed that all polymer composites formulated were thermally stable as supported by almost 100% TOC of the 300 ?C cured samples and presence of all the polymer signals in 13C NMR permeability tests performed before and after healing a longitudinal fracture base cements and polymer-cement composites gave lower (2nd/1st) permeability ratios with respect to base cements which suggests that introduction polymers result in self-healing composite materials. Curing two of the best performing polymer-cement composites for a period of 30 days at 300 °C maintained the self-healing capability. These advanced polymer-cement composites with higher mechanical stability, ductility and self-healing capability are promising alternatives tomore » wellbore cement materials for geothermal and fossil energy applications.« less

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [1];  [1]; ORCiD logo [1];  [2]
  1. BATTELLE (PACIFIC NW LAB)
  2. Battelle, PNNL
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1644263
Report Number(s):
PNNL-SA-141973
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Conference
Resource Relation:
Conference: Proceedings World Geothermal Congress 2020, April 26-May 2, 2020, Reykjavik, Iceland
Country of Publication:
Germany
Language:
English
Subject:
polymer-cement, composite, wellbore, self-healing, ductile

Citation Formats

Koech, Phillip K., Fernandez, Carlos A., Rod, Kenton A., Dai, Gao L., Huerta, Nicolas J., Burton, Sarah D., Miller, Quin RS, and Resch, Charles T. Advanced Self-Healing Polymer-Cement Composites for Geothermal Wellbore Application at 300 °C. Germany: N. p., 2020. Web.
Koech, Phillip K., Fernandez, Carlos A., Rod, Kenton A., Dai, Gao L., Huerta, Nicolas J., Burton, Sarah D., Miller, Quin RS, & Resch, Charles T. Advanced Self-Healing Polymer-Cement Composites for Geothermal Wellbore Application at 300 °C. Germany.
Koech, Phillip K., Fernandez, Carlos A., Rod, Kenton A., Dai, Gao L., Huerta, Nicolas J., Burton, Sarah D., Miller, Quin RS, and Resch, Charles T. 2020. "Advanced Self-Healing Polymer-Cement Composites for Geothermal Wellbore Application at 300 °C". Germany.
@article{osti_1644263,
title = {Advanced Self-Healing Polymer-Cement Composites for Geothermal Wellbore Application at 300 °C},
author = {Koech, Phillip K. and Fernandez, Carlos A. and Rod, Kenton A. and Dai, Gao L. and Huerta, Nicolas J. and Burton, Sarah D. and Miller, Quin RS and Resch, Charles T.},
abstractNote = {Polymer-cement composites were formulated using two base cements and three polymers and evaluated as potential alternatives to conventional geothermal wellbore cementitious material. To mimic geothermal conditions these cement composites were cured at 300 °C and their mechanical properties, including compressive strength, Young modulus, shear bond strength to steel casing, and self-healing and re-adhering (to steel) capability were tested. To test thermal stability the samples were cured at 300 °C for up to 30 days followed by analysis of their mineralogy and chemical composition by X-ray diffraction spectroscopy (XRD), 13C NMR, and total organic carbon (TOC). These tests showed that all polymer composites formulated were thermally stable as supported by almost 100% TOC of the 300 ?C cured samples and presence of all the polymer signals in 13C NMR permeability tests performed before and after healing a longitudinal fracture base cements and polymer-cement composites gave lower (2nd/1st) permeability ratios with respect to base cements which suggests that introduction polymers result in self-healing composite materials. Curing two of the best performing polymer-cement composites for a period of 30 days at 300 °C maintained the self-healing capability. These advanced polymer-cement composites with higher mechanical stability, ductility and self-healing capability are promising alternatives to wellbore cement materials for geothermal and fossil energy applications.},
doi = {},
url = {https://www.osti.gov/biblio/1644263}, journal = {},
number = ,
volume = ,
place = {Germany},
year = {Tue Jun 02 00:00:00 EDT 2020},
month = {Tue Jun 02 00:00:00 EDT 2020}
}

Conference:
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