Gas sorption and diffusion damages by guar-based fracturing fluid for CBM reservoirs

Qiming Huang, Shimin Liu, Gang Wang, Bing Wu, Yun Yang, Yu Liu

Research output: Contribution to journalArticle

Abstract

The fracturing fluid is commonly used in the CBM reservoir. Long-term field applications show that the fracturing fluids can have adverse impacts on gas transport and flow capacity for CBM reservoirs. In this study, we investigate the effect of guar-based fracturing fluid on gas sorption capacity and diffusion under different fracturing fluid treatment conditions. The Illinois coal samples were initially treated by guar-based fracturing fluid followed by isotherm sorption and diffusion experiments. We also conducted microscopic observation and 13C nuclear magnetic resonance to characterize the guar-coating effect and geochemical evolution of coal microstructures. Our experimental results show that the residue of the guar-based fracturing fluid can result in damages of gas sorption and diffusion because of the guar-coating. The degree of damages does not correlate with concentration of hydroxypropyl guar (HPG). The Langmuir pressure of the guar gel treated coal samples were significantly reduced which hinders gas desorption during the well depletion. The gas diffusivity in the macropore of the coal matrix was damaged significantly after the guar gel treatment. It was also observed that the water washing can effectively recover the gas sorption capacity and diffusivity which implies that the flowback can remove the residual guar during the flow back period after the stimulation. Based on the microscopic observation and NMR results, it was found that the HPG can coat on the coal particles and hinder the gas sorption and diffusion, but no obvious functional group change on the coal surface with the treatment. The findings of this work can provide valuable data for the guar-gel fracturing stimulation optimization for CBM reservoirs.

Original languageEnglish (US)
Pages (from-to)30-44
Number of pages15
JournalFuel
Volume251
DOIs
StatePublished - Sep 1 2019

Fingerprint

Fracturing fluids
Coal
Sorption
Gases
Gels
Nuclear magnetic resonance
Coatings
Washing
Functional groups
Isotherms
Desorption
Microstructure
Water

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry

Cite this

Huang, Qiming ; Liu, Shimin ; Wang, Gang ; Wu, Bing ; Yang, Yun ; Liu, Yu. / Gas sorption and diffusion damages by guar-based fracturing fluid for CBM reservoirs. In: Fuel. 2019 ; Vol. 251. pp. 30-44.
@article{ddc9fe13393149e79f6538e8bc75ab38,
title = "Gas sorption and diffusion damages by guar-based fracturing fluid for CBM reservoirs",
abstract = "The fracturing fluid is commonly used in the CBM reservoir. Long-term field applications show that the fracturing fluids can have adverse impacts on gas transport and flow capacity for CBM reservoirs. In this study, we investigate the effect of guar-based fracturing fluid on gas sorption capacity and diffusion under different fracturing fluid treatment conditions. The Illinois coal samples were initially treated by guar-based fracturing fluid followed by isotherm sorption and diffusion experiments. We also conducted microscopic observation and 13C nuclear magnetic resonance to characterize the guar-coating effect and geochemical evolution of coal microstructures. Our experimental results show that the residue of the guar-based fracturing fluid can result in damages of gas sorption and diffusion because of the guar-coating. The degree of damages does not correlate with concentration of hydroxypropyl guar (HPG). The Langmuir pressure of the guar gel treated coal samples were significantly reduced which hinders gas desorption during the well depletion. The gas diffusivity in the macropore of the coal matrix was damaged significantly after the guar gel treatment. It was also observed that the water washing can effectively recover the gas sorption capacity and diffusivity which implies that the flowback can remove the residual guar during the flow back period after the stimulation. Based on the microscopic observation and NMR results, it was found that the HPG can coat on the coal particles and hinder the gas sorption and diffusion, but no obvious functional group change on the coal surface with the treatment. The findings of this work can provide valuable data for the guar-gel fracturing stimulation optimization for CBM reservoirs.",
author = "Qiming Huang and Shimin Liu and Gang Wang and Bing Wu and Yun Yang and Yu Liu",
year = "2019",
month = "9",
day = "1",
doi = "10.1016/j.fuel.2019.04.031",
language = "English (US)",
volume = "251",
pages = "30--44",
journal = "Fuel",
issn = "0016-2361",
publisher = "Elsevier BV",

}

Gas sorption and diffusion damages by guar-based fracturing fluid for CBM reservoirs. / Huang, Qiming; Liu, Shimin; Wang, Gang; Wu, Bing; Yang, Yun; Liu, Yu.

In: Fuel, Vol. 251, 01.09.2019, p. 30-44.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Gas sorption and diffusion damages by guar-based fracturing fluid for CBM reservoirs

AU - Huang, Qiming

AU - Liu, Shimin

AU - Wang, Gang

AU - Wu, Bing

AU - Yang, Yun

AU - Liu, Yu

PY - 2019/9/1

Y1 - 2019/9/1

N2 - The fracturing fluid is commonly used in the CBM reservoir. Long-term field applications show that the fracturing fluids can have adverse impacts on gas transport and flow capacity for CBM reservoirs. In this study, we investigate the effect of guar-based fracturing fluid on gas sorption capacity and diffusion under different fracturing fluid treatment conditions. The Illinois coal samples were initially treated by guar-based fracturing fluid followed by isotherm sorption and diffusion experiments. We also conducted microscopic observation and 13C nuclear magnetic resonance to characterize the guar-coating effect and geochemical evolution of coal microstructures. Our experimental results show that the residue of the guar-based fracturing fluid can result in damages of gas sorption and diffusion because of the guar-coating. The degree of damages does not correlate with concentration of hydroxypropyl guar (HPG). The Langmuir pressure of the guar gel treated coal samples were significantly reduced which hinders gas desorption during the well depletion. The gas diffusivity in the macropore of the coal matrix was damaged significantly after the guar gel treatment. It was also observed that the water washing can effectively recover the gas sorption capacity and diffusivity which implies that the flowback can remove the residual guar during the flow back period after the stimulation. Based on the microscopic observation and NMR results, it was found that the HPG can coat on the coal particles and hinder the gas sorption and diffusion, but no obvious functional group change on the coal surface with the treatment. The findings of this work can provide valuable data for the guar-gel fracturing stimulation optimization for CBM reservoirs.

AB - The fracturing fluid is commonly used in the CBM reservoir. Long-term field applications show that the fracturing fluids can have adverse impacts on gas transport and flow capacity for CBM reservoirs. In this study, we investigate the effect of guar-based fracturing fluid on gas sorption capacity and diffusion under different fracturing fluid treatment conditions. The Illinois coal samples were initially treated by guar-based fracturing fluid followed by isotherm sorption and diffusion experiments. We also conducted microscopic observation and 13C nuclear magnetic resonance to characterize the guar-coating effect and geochemical evolution of coal microstructures. Our experimental results show that the residue of the guar-based fracturing fluid can result in damages of gas sorption and diffusion because of the guar-coating. The degree of damages does not correlate with concentration of hydroxypropyl guar (HPG). The Langmuir pressure of the guar gel treated coal samples were significantly reduced which hinders gas desorption during the well depletion. The gas diffusivity in the macropore of the coal matrix was damaged significantly after the guar gel treatment. It was also observed that the water washing can effectively recover the gas sorption capacity and diffusivity which implies that the flowback can remove the residual guar during the flow back period after the stimulation. Based on the microscopic observation and NMR results, it was found that the HPG can coat on the coal particles and hinder the gas sorption and diffusion, but no obvious functional group change on the coal surface with the treatment. The findings of this work can provide valuable data for the guar-gel fracturing stimulation optimization for CBM reservoirs.

UR - http://www.scopus.com/inward/record.url?scp=85064009113&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85064009113&partnerID=8YFLogxK

U2 - 10.1016/j.fuel.2019.04.031

DO - 10.1016/j.fuel.2019.04.031

M3 - Article

VL - 251

SP - 30

EP - 44

JO - Fuel

JF - Fuel

SN - 0016-2361

ER -