Laboratory investigation of the relationship between static rock elastic parameters and low field nuclear magnetic resonance data

Abstract

The static rock elastic parameters are important in the petrophysical evaluation of unconventional reservoirs since many of them need the fracturing technology for development. However, it often fails to establish models of the static rock elastic parameters through geophysical well logging data. We developed a preliminary research to explore the relationship between the static elastic parameters and the low field Nuclear Magnetic Resonance (NMR) parameters based on joint measurements of the NMR responses and rock mechanical properties. The geometric mean, the arithmetic mean of the transversal relaxation time, the cutoff value, as well as the bin porosities are considered to investigate their relationships with the static rock elastic parameters. The result revealed that the static Young's modulus is strongly correlated with the NMR parameters, whereas the static Poisson's ratio is slightly influenced by the pore size properties. This study provides a new perspective in the application of the low field NMR data.