NEW EXPERIMENTAL AND THEORETICAL BASE FOR RESERVOIR THERMAL PROPERTIES DETERMINATION AND PORE SPACE CHARACTERIZATION

摘要

New and complex research into thermal petrophysics includes an experimental and theoretical basis developed to determine the thermal conductivity,thermal diffusivity and volumetric heat capacity of dense and highly porous and fractured rocks at normal and formation thermodynamical conditions.The equipment used includes:(1) a set of nondestructive and contactless optical scanning instruments to record the variations of thermal conductivity and diffusivity along the inhomogeneous samples in dry and fluidsaturated states,with high precision and accuracy;(2) instruments for the measurement of rock thermal properties with simultaneous influences of temperature(up to 250 degC), pore pressure,and two components of lithostatic pressure(up to 200 MPa);(3) instruments for the measurement of linear thermal expansion coefficient;(4) instruments for fluid thermal conductivity measurements. Our complex research provides numerous high-precision measurements on a representative collection of full size cores and core plugs.As a result of the complex application,an extended database on rock thermal properties was created and the correlations between thermal,reservoir and other physical properties were established.