DEVICE FOR EVALUATION OF DYNAMICS OF PROCESS OF STRAIGHT-FLOW CAPILLARY SATURATION OF ROCK SAMPLES Russian patent published in 2013 - IPC E21B49/00 G01N15/08 

FIELD: oil and gas industry.

SUBSTANCE: device for evaluation of dynamics of a process of straight-flow capillary saturation of rock samples refers to petrophysical investigations. The device is designed for determination of dynamics of variation of weight of rock sample during capillary straight-flow saturation and calculation based on obtained data of some petrophysical parameters, and namely amount of trapped gas. The device implements automatic preservation of level of liquid without stiff or elastic connection, which contacts the sample and has a buffer capacity saturating a reference chamber with water. This allows performing, almost without any error, constant weighing of the reference chamber with the sample that constantly increases its weight during water absorption owing to capillary saturation. The data on the change of weight in time, which is fixed with electronic weighs, is processed by means of a computer.

EFFECT: improving evaluation accuracy of dynamics of rock saturation due to hydrodynamic connection of a reference chamber and a buffer capacity.

2 cl, 2 dwg