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A device and method for online measurement of gas injection crude oil volume coefficient and solubility

A technology of volume coefficient and solubility, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of bulky, high instrument prices, and high prices, and achieve the effect of improving automation, high precision, and ensuring accuracy

Active Publication Date: 2019-01-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the price of the instrument is high, the price is generally between 700,000 and 1.6 million yuan, and the volume is large
For petroleum workers who only need to measure the solubility of gas in crude oil, volume coefficient and other parameters, the price of existing PVT instruments is too high

Method used

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  • A device and method for online measurement of gas injection crude oil volume coefficient and solubility
  • A device and method for online measurement of gas injection crude oil volume coefficient and solubility
  • A device and method for online measurement of gas injection crude oil volume coefficient and solubility

Examples

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Embodiment 1

[0041] like figure 1 As shown, a device for online measurement of gas injection crude oil volume coefficient and solubility includes a gas supply system, a buffer system, a test system, a gas phase analysis system and a data acquisition system, the gas supply system includes a gas cylinder 1; the buffer system Including a high-pressure buffer container 3, the input port of the buffer container 3 is connected to the gas cylinder 1 through a pipeline with a first gate valve 2, and the output port is connected to the input port of a high-pressure reaction vessel 5 through a pipeline with a second gate valve 4; The test system includes a high-pressure reaction vessel 5, a temperature controller 9 arranged on the high-pressure reaction vessel 5; the gas phase analysis system includes a gas chromatograph 11 for component analysis of the gas composition in the high-pressure reaction vessel 5; The shown data acquisition system includes a computer 13, a data collector 12 and a temperat...

Embodiment 2

[0048] In this example, CO 2Taking gas as an example, the volume of the high-pressure reactor 5 in the test (PVT) system is known to be 380.06mL (the diameter of the high-pressure reactor 5 is D=4.65cm, and the height H=22.38cm). The test temperature is 60°C, and the oil samples are taken from Block Qi 40 of Liaohe Oilfield.

[0049] Measure about 200mL of dehydrated crude oil and inject it into the high-pressure reactor, and the liquid level sensor 8 shows the oil sample height H 1 =11.78cm, after calculation, the volume of crude oil is V 1 =200.05mL, the rest is CO 2 The volume of the gas, ie V 11 = 180.01mL; After purging the gas to discharge the air in the high-pressure reactor, inject CO at room temperature 2 Gas to a given pressure, P 1 =3.00MPa, gas temperature is T 1 =298.15K, the gas component is pure CO 2 Gas, under the temperature and pressure conditions at this time, the compressibility factor Z 1 =0.8186394; raise the temperature to the test temperature of...

Embodiment 3

[0052] In this embodiment, the simulated flue gas (expressed in volume mole fraction, where CO 2 30%, N 2 70%) as an example, the volume of the high pressure reactor 5 in the test (PVT) system is known to be 380.06mL (high pressure reactor 5 diameter D=4.65cm, height H=22.38cm), and the test temperature is 60°C.

[0053] Measure about 200mL of dehydrated crude oil and inject it into the high-pressure reactor, and the liquid level sensor 8 shows the oil sample height H 1 =11.78cm, after calculation, the volume of crude oil is V 1＝ 200.05mL, the rest is the volume of simulated flue gas, namely V 11 =180.01mL; After purging the gas to discharge the air in the high-pressure reactor, inject the simulated flue gas at room temperature to a given pressure, which is P 1 =3.00MPa, gas temperature is T 1 =298.15K, the composition of simulated flue gas obtained by gas chromatography analysis is CO 2 30.5%, N 2 is 69.5%, under the conditions of temperature and pressure at this time, ...

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Abstract

The invention discloses a device for online measurement of a gas injection crude oil volume factor and solubility.The device comprises a gas supply system, a buffer system, a testing system, a gas phase analysis system and a data collection system.The gas supply system comprises a gas cylinder.The buffer system comprises a high pressure buffer container.The buffer container is connected with a gas cylinder high pressure reaction container.The testing system comprises a high pressure reaction container and a temperature controller arranged on the high pressure reaction container.The gas phase analysis system comprises a gas chromatograph.The data collection system comprises a computer, a data collector and a temperature sensor, a pressure sensor and a liquid level sensor which are arranged on the high pressure reaction container.The invention further discloses a method for online measurement of the gas injection crude oil volume factor and solubility.Online testing of PVT data of crude oil before and after gas injection can be achieved, the measured PVT data is utilized for working out the crude oil volume factor and solubility parameters, and convenience and rapidness are achieved.

Description

technical field [0001] The invention relates to a test device in the technical field of oil recovery in oilfields, in particular to a device and method for on-line measurement of the volume coefficient and solubility of gas-injected crude oil. Background technique [0002] Thermal oil recovery (steam huff and puff and steam flooding) is to inject a certain amount of gas into the formation from the oil casing annulus of the oil well. Crude oil is easy to extract. After half a century of research and application, thermal oil recovery technology is recognized as one of the most feasible and effective methods. Before the actual industrial application of thermal oil recovery, it is necessary to use the PVT instrument to measure the physical properties of crude oil, such as the solubility of gas in crude oil, volume coefficient, viscosity and other parameters. The value of PVT testing of crude oil is that it can provide parameters for steam injection operations in reservoirs, pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/28
CPCG01N33/2823
Inventor 樊栓狮杨召令郎雪梅王燕鸿
Owner SOUTH CHINA UNIV OF TECH
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