Patent ID: 11940367
Assignee: SOUTHWEST PETROLEUM UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC G  Y | IPC G

Claim 0:
1. A device for simulating carbon dioxide (CO2) storage in a deep saline aquifer, comprising:
a CO2 gas source;
a first valve;
a second valve;
a first pressure pump;
a second pressure pump;
a first pressure gauge;
a second pressure gauge;
a third pressure gauge;
a water storage tank;
a stimulation box;
a first flow meter;
a gas-liquid separator;
a recycling tank;
a microcomputer-display assembly;
a structure plate;
a plurality of core holders;
an injection pipeline;
a connection pipeline;
a baffle;
a piezometer;
a second flow meter;
a heater;
a lifter; and
an acoustic logging tool;
wherein the CO2 gas source, the first valve, the first pressure pump and the first pressure gauge are arranged on a first pipe for gas injection; the water storage tank, the second pressure pump and the second pressure gauge are arranged on a second pipe for water injection; and the second valve, the third pressure gauge, the first flow meter, the gas-liquid separator and the recycling tank are arranged on a third pipe to form an output pipeline; the stimulation box is connected to the first pressure gauge, the second pressure gauge and the second valve, and is located at a junction of the first pipe, the second pipe and the output pipeline; the microcomputer-display assembly is connected with the stimulation box, and is configured to save and display injection rates of the first pressure pump and the second pressure pump and values of the piezometer, the second flow meter and the heater; the structure plate, the baffle, the heater, the lifter and the acoustic logging tool are arranged in the stimulation box to form an anticline structure with stable shape and temperature to monitor movement of a gas-water interface;
the plurality of core holders, the connection pipeline and the injection pipeline are placed on the structure plate, and the plurality of core holders are fixed by the baffle; the lifter is configured to lift the structure plate to form the anticline structure; the lifter has an independent adjustment ability, and is capable of simulating various structural forms; the injection pipeline is directly connected with the connection pipeline between the plurality of core holders to inject carbon dioxide gas into a top of the deep saline aquifer; the piezometer and the second flow meter are arranged on the connection pipeline between the plurality of core holders to monitor gas-water flow between the plurality of core holders; and
each of the plurality of core holders is composed of a core holder body and a cover; a first end of the core holder body is non-detachably connected with the connection pipeline, and a second end of the core holder body is configured to enable tri-axial core holding, and is threadedly connected with the cover; the plurality of core holders are communicated with the connection pipeline so that the plurality of core holders have the same pressure; a first side of the simulation box is connected with the second pipe to maintain stable pressure inside the plurality of core holders, and a second side of the simulation box is connected with the output pipeline to discharge gas and liquid inside the simulation box; and the second valve, the third pressure gauge, the first flow meter, the gas-liquid separator and the recycling tank are arranged on a fourth pipe to separate and recycle a fluid produced in the simulation box.