Shale hydration damage captured by nuclear magnetic resonance

Ping Wang, Zhan Qu, Elli-Maria Charalampidou

Research output: Contribution to journalArticle

Abstract

Wellbore instability could restrict the efficient development of unconventional petroleum resources in shales as drilling fluids may influence the integrity of shales by causing hydration damage. In this work we study the impact of hydration on shale samples from Xi Feng formations using Nuclear Magnetic Resonance. Samples were saturated in distilled water for different durations and then samples’ T2 relaxation time and the spectrum area were analyzed using NMR. Damage variable, which can not only interpret the hydration damage in shales quantitatively but has also a key importance to build the damage theory, was defined with NMR T2 spectrum area, according to a relationship between the T2 relaxation time and the size of damage. Accuracy of the defined damage variable was verified by NMR images.GRAPHICAL ABSTRACT (Figure presented.).

Original languageEnglish
JournalJournal of Dispersion Science and Technology
Early online date8 Oct 2018
DOIs
Publication statusE-pub ahead of print - 8 Oct 2018

Fingerprint

Shale
Hydration
hydration
Nuclear magnetic resonance
damage
nuclear magnetic resonance
shales
Relaxation time
Drilling fluids
Petroleum
relaxation time
Crude oil
crude oil
drilling
integrity
Water
resources
fluids
water

Keywords

  • Damage variable
  • hydration damage
  • NMR
  • shale

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Polymers and Plastics

Cite this

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Shale hydration damage captured by nuclear magnetic resonance. / Wang, Ping; Qu, Zhan; Charalampidou, Elli-Maria.

In: Journal of Dispersion Science and Technology, 08.10.2018.

Research output: Contribution to journalArticle

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AB - Wellbore instability could restrict the efficient development of unconventional petroleum resources in shales as drilling fluids may influence the integrity of shales by causing hydration damage. In this work we study the impact of hydration on shale samples from Xi Feng formations using Nuclear Magnetic Resonance. Samples were saturated in distilled water for different durations and then samples’ T2 relaxation time and the spectrum area were analyzed using NMR. Damage variable, which can not only interpret the hydration damage in shales quantitatively but has also a key importance to build the damage theory, was defined with NMR T2 spectrum area, according to a relationship between the T2 relaxation time and the size of damage. Accuracy of the defined damage variable was verified by NMR images.GRAPHICAL ABSTRACT (Figure presented.).

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