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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Nuclear Magnetic Resonance and Sound Velocity Measurements of Chalk Saturated with Magnesium Rich Brine
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 precipitates forming extra internal surface in the sample. Sonic velocities were relatively low in the MgCl2 solution saturated plugs.
Nuclear Magnetic Resonance and Sound Velocity Measurements of Chalk Saturated with Magnesium Rich Brine
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 precipitates forming extra internal surface in the sample. Sonic velocities were relatively low in the MgCl2 solution saturated plugs.
Nuclear Magnetic Resonance and Sound Velocity Measurements of Chalk Saturated with Magnesium Rich Brine
Katika, K. (Autor:in) / Alam, M. M. (Autor:in) / Fabricius, I. L. (Autor:in)
Fifth Biot Conference on Poromechanics ; 2013 ; Vienna, Austria
Poromechanics V ; 678-684
18.06.2013
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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