supercritical co 2 Flowmeter calibration device and calibration method thereof
A calibration device and flowmeter technology, applied in measuring devices, test/calibration devices, liquid/fluid solid measurement, etc., can solve problems such as unreachable temperature conditions, unachievable, no temperature adjustment mechanism, etc., to achieve stable pressure fluctuations Problems, the effect of ensuring measurement accuracy
A calibration device and flowmeter technology, applied in measuring devices, test/calibration devices, liquid/fluid solid measurement, etc., can solve problems such as unreachable temperature conditions, unachievable, no temperature adjustment mechanism, etc., to achieve stable pressure fluctuations Problems, the effect of ensuring measurement accuracy
CN104568082BActive Publication Date: 2017-10-17CHINA PETROLEUM & CHEM CORP +1
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[0027] The working state of the flowmeter used for downhole measurement of layered CO2 injection gas wells is a high temperature and high pressure environment. The temperature is generally between 50 and 150 ° C, and the pressure is generally above 10 MPa. This range is the supercritical state of CO2. Commercially purchased CO2 is in a liquid tank, the temperature is about -20°C to -30°C, and the pressure inside the tank is generally about 2MPa. According to this condition, in order to change the liquid CO2 into a supercritical state, the experimental device needs to increase the temperature and pressure of the liquid CO2.
[0028] see figure 1 Supercritical CO 2 Schematic diagram of the flow meter calibration device, the metering tank 3 is installed on the weighing device 4, and the gas storage tank 1, the pouring pump 2, the metering tank 3, the valve 1, the liquid feeding pump 8, and the booster pump 10 are connected in sequence with the pipeline 13 , heat exchanger 14, s...
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The invention relates to a supercritical CO2 flowmeter calibration device and a calibration method thereof, which are used for supercritical CO2 flowmeter calibration. A metering tank is arranged at the upper surface of a weighing device; a gas storage tank, a liquid pouring pump, the metering tank, a valve I, a liquid feeding pump, a booster pump, a heat exchanger, a surge tank, a valve III, a clamper, a throttle nozzle, a regulating valve II and a waste gas emptying device are sequentially connected by virtue of pipelines; one end of a valve II is connected with the gas storage tank, and the other end of the valve II is connected between the valve I and the liquid feeding pump. The calibration method comprises the following steps: closing the valves, regulating the regulating valve and mounting a flowmeter; regulating a gas nozzle; operating the heat exchanger; injecting liquid CO2 into the metering tank from the gas storage tank; opening the valve II, operating the liquid feeding pump and the booster pump, regulating the flow, and when the pressure reaches a designed value, opening the valve III; regulating the regulating valve II to enable the pressure to reach a calibration value; closing the valve II, opening the valve I, recording the mass and time of the metering tank, and calculating mass flow. The device is capable of realizing CO2 flow calibration under a supercritical environment.
Description
technical field [0001] The invention relates to the technical field of flowmeter calibration, in particular to supercritical CO 2 Flow meter calibration device and calibration method. Background technique [0002] Currently, by injecting CO into the formation 2 Oil flooding has been paid more and more attention by the industry. On the one hand, it is the need of oilfield development, and on the other hand, it is the need of reducing greenhouse gas emissions. CO 2 Oil displacement technology has been developed for many years, but the current gas injection technology is mainly all-well co-injection. Due to the difference in gas absorption capacity of formations, better oil displacement effect will be achieved by layered gas injection. In order to measure the gas injection volume of the stratification, downhole flowmeters are needed, however, the downhole flowmeters currently in use are not suitable for measuring CO 2 The flow rate, therefore need to develop specially for ...
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Patent Timeline
17 Oct 2017
Publication
CN104568082B
- IPC
- G01F25/00
- Inventors
- 王世杰; 魏伟