Some aspects of air-entrainment on decay rates in hydraulic pulse tests

A. P S Selvadurai, Yasuaki Ichikawa

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Important factors that can influence interpretation of the pulse tests include the compressibility and viscosity of the fluid that either saturates the pore space of the rock or is used to pressurize the chamber, which generates the pressure pulse. Fluid compressibility can be influenced by entrained air. This paper examines theoretically, the influence of compressibility and viscosity variations in both the interstitial pore water and within the pressurizing chamber, on the performance of the hydraulic pulse test. Convenient analytical results can be derived to account for variations in compressibility and viscosity resulting from entrained air. Theoretical results indicate that the entrained gas content can have an appreciable influence on the pressure decay curves, and particularly high volume fractions of the entrained air can influence the estimation of the permeability from hydraulic pulse tests. The paper concludes with a brief discussion of the influence of dissolved air on the performance of pulse tests.

Original languageEnglish
Pages (from-to)38-45
Number of pages8
JournalEngineering Geology
Volume165
DOIs
Publication statusPublished - Oct 24 2013

Fingerprint

Air entrainment
compressibility
Compressibility
entrainment
Hydraulics
hydraulics
viscosity
air
Viscosity
Air
porewater
Fluids
fluid
Pressurization
pore space
Volume fraction
Rocks
permeability
rate
test

Keywords

  • Air-entrainment
  • Compressibility of pore fluid
  • Hydraulic pulse tests
  • Permeability measurement
  • Pulse decay patterns
  • Rocks with gassy fluids

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geology

Cite this

Some aspects of air-entrainment on decay rates in hydraulic pulse tests. / Selvadurai, A. P S; Ichikawa, Yasuaki.

In: Engineering Geology, Vol. 165, 24.10.2013, p. 38-45.

Research output: Contribution to journalArticle

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