Nuclear magnetic resonance and sound velocity measurements of chalk saturated with magnesium rich brine

Konstantina Katika, Mohammad Monzurul Alam, Ida Lykke Fabricius

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The use of low field Nuclear Magnetic Resonance (NMR) to determine petrophysical properties of reservoirs has proved to be a good technique. Together with sonic and electrical resistivity measurements, NMR can contribute to illustrate the changes on chalk elasticity due to different pore water composition. In this study we relate NMR data to changes in P-wave velocity and electrical resistivity. Core plugs from outcrop Stevns chalk, of 44% porosity, were divided into groups of three and saturated with deionized water, calcite equilibrated water, as well as sodium chloride and magnesium chloride solutions of the same ionic strength. Saturation with a solution that contained divalent ions caused a major shift on the distribution of the relaxation time. The changes were probably due to precipitats forming extra internal surface in the sample. Sonic velocities were relatively low in the MgCl2 solution saturated plugs.

Original languageEnglish
Title of host publicationPoromechanics V : Proceedings of the Fifth Biot Conference on Poromechanics
Number of pages7
PublisherAmerican Society of Civil Engineers
Publication date2013
ISBN (Print)978-0-7844-1299-2
Publication statusPublished - 2013
Event5th BIOT Conference on Poromechanics (BIOT-5) - Vienna University of Technology (TU Wien), Vienna, Austria
Duration: 10 Jul 201312 Jul 2013
Conference number: 5


Conference5th BIOT Conference on Poromechanics (BIOT-5)
LocationVienna University of Technology (TU Wien)
Internet address

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