METHOD AND DEVICE FOR MEASURING EFFICIENT POROSITY OF ROCKS Russian patent published in 2007 - IPC G01N24/08 

FIELD: measuring technique.

SUBSTANCE: coefficient of open porosity K_po of core is measured. Then total curve of spin-grating relaxation (SGR) is measured automatically received from threshold fluid in sample. Measured curve is subject to component-analytical mathematical processing and correspond group/phase contents of residual water in rock-selector is measured by means of relaxation/volumetric transparency from component values of relaxation times. Coefficient of total residual water content K_wa of core is determined by summing products of component/part saturations W_i with phase/group content of residual water K_wai in it from relation K_wa=n_ixW_ixK_wai, where n_i is number of component/group/phases in collector. After that coefficient of effective porosity K_poef of rock/collector is measured automatically by means of specific values of open porosity coefficients K_po and residual water saturation K_wa for sample of core from relation of K_poef=K_po(1-K_wa).

EFFECT: reduced time for measurements; improved precision; higher truth of results.

19 cl, 1 dwg