relation: https://episodesplatform.eu/eprints/2140/
title: Acoustic monitoring of thermo-mechanical tests in a salt mine
creator: Cyrille, Balland
creator: Anne, Raingeard
creator: Joël, Billiotte
creator: Bruno, Tessier
creator: Emmanuel, Hertz
creator: Grégoire, Hévin,
subject: Other-additional study
subject: France
subject: Underground storage of fluids
description: The  natural  gas  storage  in  salt  caverns  requires  faster  injection  cycles  /  racking  due  to  the  increasing   dynamics of the energy market. These cycles induce rapid changes in the internal pressure of the stored   gas  causing  important  temperature  changes  that  can  damage  the  rock  salt  mass.  Several  theoretical   studies have been conducted to estimate this type of damage (Brouard et al, 2011; Sicsic and Berest,   2014).  To  experimentally  observe  this  damage,  the  Solution  Mining  Research  Institute  (SMRI)  has   cofounded the Starfish project between 2013 to 2016 and led by Storengy in partnership with the Ecole   des Mines de Paris, the Salins du Midi and INERIS. The main objective of this project was to initiate and   characterize the damage by purely thermal stresses at the surface of a large bloc of salt partially slotted   in  a  rock  mass  of  the  salt  Mine  of  Varangéville  (France).  This  was  to  determine  the  type  of  failure   mechanism involved, the nature and extent of the cracks induced, as well as amplification of the damage   of the solid mass with repeated cooling cycles.   The salt being favorable to the generation of Acoustic Emissions (AE) and the propagation of the stress   waves,  the  acoustic  monitoring  method  has  been  chosen  to  follow  the  impact  of  the  salt  cooling.  In   addition  to  thermal  and  mechanical  sensors,  an  acoustic  monitoring  device  consisting  of  16  ultrasonic   sensors has been installed on the free surface and in boreholes. It enabled to record and locate a large   number of AE (58426) with good accuracy (2.5 cm). Those AE can be correlated to the evolution of salt   fracturing. Acoustic monitoring provided a very good insight in the physics of the damaging process.
date: 2016
type: Conference or Workshop Item
type: NonPeerReviewed
format: text
language: en
identifier: https://episodesplatform.eu/eprints/2140/1/Balland_et_al_%202016.pdf
identifier:   Cyrille, Balland and Anne, Raingeard and Joël, Billiotte and Bruno, Tessier and Emmanuel, Hertz and Grégoire, Hévin,  (2016) Acoustic monitoring of thermo-mechanical tests in a salt mine.  In: SMRI Spring 2016 Technical Conference, 25 – 26 April 2016, Galveston, Texas, USA.