Carboxymethyl Hydroxypropyl Xanthan Gum and Its Rheological Properties

LIU Shuang; ZHANG Hong; FANG Bo; LU Yongjun; QIU Xiaohui; ZHAI Wen

doi:10.3969/j.issn.1001-5620.2017.05.020

Volume 34 Issue 5

Sep. 2017

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LIU Shuang, ZHANG Hong, FANG Bo, LU Yongjun, QIU Xiaohui, ZHAI Wen. Carboxymethyl Hydroxypropyl Xanthan Gum and Its Rheological Properties[J]. DRILLING FLUID & COMPLETION FLUID, 2017, 34(5): 106-110,116. doi: 10.3969/j.issn.1001-5620.2017.05.020

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LIU Shuang, ZHANG Hong, FANG Bo, LU Yongjun, QIU Xiaohui, ZHAI Wen. Carboxymethyl Hydroxypropyl Xanthan Gum and Its Rheological Properties[J]. DRILLING FLUID & COMPLETION FLUID, 2017, 34(5): 106-110,116. doi: 10.3969/j.issn.1001-5620.2017.05.020

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Carboxymethyl Hydroxypropyl Xanthan Gum and Its Rheological Properties

doi: 10.3969/j.issn.1001-5620.2017.05.020

1. Chemical Engineering Research Center, East China University of Science and Technology, Shanghai 200237;
2. Langfang Branch of PetroChina Research Institute of Petroleum Exploration and Development, Langfang, Hebei 065007

Received Date: 2017-06-23
Publish Date: 2017-09-30

Abstract

Abstract

To broaden the application scope of xanthan gum, a carboxymethyl hydroxypropyl xanthan gum (CMHPXG) has been developed withepoxy propane, sodium chloroacetate and xanthan gum (XG) in alcohol solvent. The CMHPXG synthesized was studied for its rheological properties (shearing thinning characteristics, viscoelasticity and thixotropy) and its basic performance (sand carrying capacity, high temperature resistance and shearing resistance) as a fracturing fluid. The study showed that the apparent viscosity of a 0.5% CMHPXG water solution was 3.35 times of that of an XG water solution of the same concentration, and the CMHPXG solution had elastic modulus, viscous modulus and thixotropy loop area obviously greater than the XG solution. The settling velocity of haydite in CMHPXG solution was far less than that in XG solution, greatly improving sand carrying capacity of fracturing fluids. A 0.4% XG solution had apparent viscosity of 43.1 mPa·s, while a 0.4% CMHPXG solution, after being sheared 90 min at 120℃ and 170 s^-1, had apparent viscosity of 64 mPa·s, indicating that CMHPXG had better high temperature resistance and shearing resistance. The flow curves of XG solution and CMHPXG solution can be characterized with Cross constitutive equation, and the simulated rheological values were well fitted with the experimental ones. Compared with xanthan gum, the CMHPXG developed has basic properties that are greatly improved.
- Xanthan gum,
- Modification,
- Rheological property,
- Fracturing fluid

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References(20)

References

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Carboxymethyl Hydroxypropyl Xanthan Gum and Its Rheological Properties

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