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Quantify the effect of temperature on the electrical resistivity, yield stress, and HPHT fluid loss of the bentonite-clay drilling mud modified with acrylamide polymer

Quantify the effect of temperature on the electrical resistivity, yield stress, and HPHT fluid... In this study, the effect of acrylamide polymer modified bentonite on the fluid loss and yield stress of water-based drilling mud at different temperatures up 85 °C were studied. Bentonite content in the drilling mud was varied from 2 to 8% by the weight of water. The polymer content was varied between 0 and 0.24% by the weight of bentonite. The bentonite and polymer were characterized using X-ray analysis and thermal gravimetric analysis (TGA). Based on the X-ray diffraction analyses the major constituents of the bentonite were montmorillonite (MMT), (Na, Ca)0.33(Al, Mg)2(Si4O10)(OH)2·nH2O), feldspar (Albite) (NaAlSi3O8), kaolinite (Al2Si2O5(OH4)), Beidellite (Na, Ca0.5)0.3Al((Si, Al)4O10)(OH)2·nH2O and quartz (SiO2), also it was shown the major constituents of acrylamide polymer were ammonium hydroxide carbonate amine ((NH4)·CH3CONH2) and ammonia hydrate (2NH3H2O). The results showed that the polymer-modified bentonite decreased the fluid loss of the drilling mud by 28–52% based on the bentonite content and temperature in drilling mud. TGA analyses showed a notable reduction in the weight of bentonite between 600 and 800 °C. Modifying the bentonite using 0.24% of polymer reduced the total weight loss at 800 °C from 6.42 to 1.26%. an 80% reduction. The polymer modification decreased the yield stress (τo) of drilling mud by 30–60% based on the bentonite content and temperature. The results showed that fluid loss decreased with an increasing amount of polymer. The electrical resistivity of the drilling mud decreased from 8.5 to 3.9 Ω-m, a 53% reduction when the bentonite content increased from 2 to 8% at room temperature. The electrical resistivity of the filter cake formation of the bentonite drilling mud modified with 0.24% polymer decreased by 33–57% based on the bentonite content and temperature. The polymer is an excellent potential additive for reducing the fluid loss and yield stress of drilling muds. The effects of bentonite and polymer content on the model parameters have been quantified using a nonlinear model (NLM). The NLM quantified the effect of polymer treatment on all the model parameters. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Building Pathology and Rehabilitation Springer Journals

Quantify the effect of temperature on the electrical resistivity, yield stress, and HPHT fluid loss of the bentonite-clay drilling mud modified with acrylamide polymer

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References (50)

Publisher
Springer Journals
Copyright
Copyright © Springer Nature Switzerland AG 2020
ISSN
2365-3159
eISSN
2365-3167
DOI
10.1007/s41024-020-00085-z
Publisher site
See Article on Publisher Site

Abstract

In this study, the effect of acrylamide polymer modified bentonite on the fluid loss and yield stress of water-based drilling mud at different temperatures up 85 °C were studied. Bentonite content in the drilling mud was varied from 2 to 8% by the weight of water. The polymer content was varied between 0 and 0.24% by the weight of bentonite. The bentonite and polymer were characterized using X-ray analysis and thermal gravimetric analysis (TGA). Based on the X-ray diffraction analyses the major constituents of the bentonite were montmorillonite (MMT), (Na, Ca)0.33(Al, Mg)2(Si4O10)(OH)2·nH2O), feldspar (Albite) (NaAlSi3O8), kaolinite (Al2Si2O5(OH4)), Beidellite (Na, Ca0.5)0.3Al((Si, Al)4O10)(OH)2·nH2O and quartz (SiO2), also it was shown the major constituents of acrylamide polymer were ammonium hydroxide carbonate amine ((NH4)·CH3CONH2) and ammonia hydrate (2NH3H2O). The results showed that the polymer-modified bentonite decreased the fluid loss of the drilling mud by 28–52% based on the bentonite content and temperature in drilling mud. TGA analyses showed a notable reduction in the weight of bentonite between 600 and 800 °C. Modifying the bentonite using 0.24% of polymer reduced the total weight loss at 800 °C from 6.42 to 1.26%. an 80% reduction. The polymer modification decreased the yield stress (τo) of drilling mud by 30–60% based on the bentonite content and temperature. The results showed that fluid loss decreased with an increasing amount of polymer. The electrical resistivity of the drilling mud decreased from 8.5 to 3.9 Ω-m, a 53% reduction when the bentonite content increased from 2 to 8% at room temperature. The electrical resistivity of the filter cake formation of the bentonite drilling mud modified with 0.24% polymer decreased by 33–57% based on the bentonite content and temperature. The polymer is an excellent potential additive for reducing the fluid loss and yield stress of drilling muds. The effects of bentonite and polymer content on the model parameters have been quantified using a nonlinear model (NLM). The NLM quantified the effect of polymer treatment on all the model parameters.

Journal

Journal of Building Pathology and Rehabilitation – Springer Journals

Published: Jun 6, 2020

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