CAPILLARY PRESSURE GRAVIMETRIC SYSTEM GROUP UNIT Russian patent published in 2018 - IPC G01N15/08 

FIELD: measuring equipment.

SUBSTANCE: invention relates to the measurement equipment, namely, it can be used to determine the pore space in rock samples residual water saturation by the desaturation method using the semipermeable ceramic membranes in the wells geological and technological research computerized stations and in petrophysical laboratories. Capillary pressure gravimetric system group unit contains desaturation chambers 1, standby compressor 2, booster 3, receiver 4, gas humidifiers 5. Each of desaturation chamber 1 input is connected to the individual low pressure sensor 6 via the shut-off valve 7, high pressure sensor 8 and is equipped with the individual reducer with the pressure gauge 9. Standby compressor 2 is installed on the low pressure line 10. Booster 3 and receiver 4 are installed on the high pressure line 11. Receiver 4 is equipped with the drain valve 12. Gas humidifiers 5 are located upstream of the desaturation chambers 1 and are installed on the low and high pressure lines 10, 11, respectively. Low pressure line 10 is equipped with the standby compressor 2, the shut-off valve 13 and the check valve 14. At the input, the low pressure line 10 is connected to the mainline compressor. Upstream of the booster 3 and the receiver 4 the high pressure line 11 is equipped with reducers with the pressure gauges 15. Downstream of the backup compressor 2, at the input the high pressure line 11 is embedded into the low pressure line 11. At the output, the low 10 and the high pressure lines 11, via the multi-chamber splitters 16, are connected to the individual reducers with pressure gauges 9, to which, in turn, each desaturation chamber 1 individual low 6 and high 8 pressure sensors are connected. At that, each multi-chamber splitter 16 interconnects the desaturation chambers 1 to the low pressure 10 or high pressure 11 operating lines. Each desaturation chamber 1 is a container with the cover 17, with installed inside a ceramic semi-permeable membrane 18, on which surface the filter paper 19 is placed to improve the contact between it and the core sample 20, wherein the membranes 18 have different operating pressures and are selected depending on the core samples 20 permeability. Desaturation chambers are made of stainless steel. All connections are made with collet composite connections, low-pressure line pipes are made from polyurethane materials, and high-pressure line pipes are made from Teflon.

EFFECT: enabling the possibility of the pore space in rock samples residual water saturation simultaneous determination by the desaturation method using the semipermeable membranes of different operating pressure, no need for constant dismantling operations, the control circuit simplification, increase in the device operation safety.

1 cl, 2 dwg