DETERMINATION OF ROCK WATER SATURATION Russian patent published in 2015 - IPC G01N23/00 

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to oil production and can be used for determination of reservoir properties of fractured rocks. This method is designed to define the rock specimen maximum moisture content c_rock. It consists in placing in retort chamber of metallic imitator in volume equal to that of rock specimen, said chamber being heated to 140-150°C to define initial moisture content c₀ in said retort. Defined are the retort calibration ratio and constant factor α, universal for used retort. Water is evaporated from rock specimen at 140-150°C in closed retort. Rock specimen water content is calculated by the formula: $$S_w=\frac{({с}_{rock}-{с}_0)(V_0-V_{spec})}{\alpha V_{pore}}(1)$$ , where S_w is specimen water saturation; c_rock is measured maximum moisture content of said specimen; c₀ is moisture content in retort without specimen defined directly before evaporation at 140-150°C; V₀ is volume of retort with feed components; V_spec is volume of rock specimen; α is constant factor, universal for this retort; V_pore is the volume of specimen pores.

EFFECT: higher validity and accuracy.

3 cl, 2 dwg, 2 tbl