Title
Estimating the distribution of salt cavern squeeze using subsidence measurements
Author
Fokker, P.A.
Visser, J.
Contributor
Detournay, E. (editor)
Sterling, R. (editor)
Petersen, L. (editor)
Labuz, J.F. (editor)
Pettitt, W. (editor)
Publication year
2014
Abstract
We report a field study on solution mining of magnesium chloride from bischofite layers in the Netherlands at depths between 1500 and 1850 m. Subsidence that was observed in the area is due to part of the brine production being realized by cavern squeeze; some of which were connccted. Wc used an earlier developed inversion scheme to quantify the distribution of the squeeze volumes from the subsidence measurements. We incorporated in it the creep behavior of the rock salt as a convolution between the time-dependent response of a squeeze event and the actual production history. With a Maxwell viscoelastic behavior in the salt with realistic time constant, we achieved a good result for the subsidence values and for the observed ratio between subsidence bowl volume and squeeze volume. With the new understanding we created physics-based forecasts for different production scenarios and provided an estimate for the remaining time and the producible volumes before the maximum allowed amount of subsidence is reached. After completely stopping production, our model predicted a rebound of the subsidence. Copyright © 2014 ARMA.
Subject
Earth / Environmental
PG - Petroleum Geosciences
ELSS - Earth, Life and Social Sciences
Geo Energy
Geosciences
Energy
Chlorine compounds
Geomechanics
Rock mechanics
Salt deposits
Creep behaviors
Inversion scheme
Time-dependent response
Visco-elastic behaviors
Subsidence
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http://resolver.tudelft.nl/uuid:81315f32-6abf-4d40-9cae-62a5321de9a3
TNO identifier
524722
Publisher
American Rock Mechanics Association (ARMA)
ISBN
9781634395236
Source
48th US Rock Mechanics / Geomechanics Symposium 2014, 3, 2014-2023
Document type
conference paper