CN206671293U - One kind is used to determine CO2The device of multicomponent system minimum miscibility pressure - Google Patents
One kind is used to determine CO2The device of multicomponent system minimum miscibility pressure Download PDFInfo
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- CN206671293U CN206671293U CN201720334259.9U CN201720334259U CN206671293U CN 206671293 U CN206671293 U CN 206671293U CN 201720334259 U CN201720334259 U CN 201720334259U CN 206671293 U CN206671293 U CN 206671293U
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- hanging drop
- hthp
- densitometer
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Abstract
The utility model belongs to CO2Drive and improve oil well recovery efficiency technique field, specifically disclose a kind of for determining CO2The device of multicomponent system minimum miscibility pressure, the device include：Crude supply system, carbon dioxide feed system, auxiliary agent feed system, HTHP densitometer and the pumped vacuum systems being connected respectively with HTHP hanging drop interfacial tensimeter；Wherein, the HTHP densitometer can CO in on-line determination HTHP hanging drop interfacial tensimeter2The density of multicomponent system, the pumped vacuum systems are used for the vacuum of control device.CO can be determined using device of the present utility model2The minimum miscibility pressure of multicomponent system.
Description
Technical field
The utility model belongs to CO2Drive and improve oil well recovery efficiency technique field, and in particular to one kind is used to determine CO2It is multigroup
The device of split system minimum miscibility pressure.
Background technology
At present, CO is determined2Mainly there are three kinds with the experimental provision of crude oil minimum miscibility pressure：Long tubule, hanging drop interface
Power instrument and liter bubble instrument.Wherein, more authoritative is to determine CO using long tubule2(Cao Yin contains bis- with the minimum miscibility pressure of crude oil
Experimental study [J] oilfield chemistries of carbonoxide minimum miscibility pressure influence factor, 1986,3 (3)：159-166), the experiment fills
Put is to carry out CO using long thin tube model2The displacement of reservoir oil, displacement pressure when displacement multiple reaches 1.2PV, oil displacement efficiency is more than 90%
It is considered CO2With the minimum miscibility pressure of crude oil, but determine minimum miscibility pressure using the device and method time-consuming.And
Rise easier (Guo Ping, Yang Xuefeng, Ran Xin power reservoir gas injections minimum miscibility pressure research [M] the Beijing of bubble instrument apparatus operation：Oil
Industrial publishing house, 2005), but it can only determine evaporation gas drive miscible pressure, by qualitatively judging, lack quantitative analysis.
CO is determined using sessile drop method2It is to utilize the observation of hanging drop interfacial tensimeter, measure CO with crude oil minimum miscibility pressure2With
Pressure when interface disappears between crude oil oil droplet is CO2(Peng is precious young, Luo Hu, Chen Guangjin, grandson's length with the minimum miscibility pressure of crude oil
Space determines CO with interfacial tension method2With minimum miscibility pressure [J] petroleum journals of crude oil, 2007,28 (3)), the device only needs
Heavy phase, the density of light phase are inputted, until boundary disappears, analyzed by data and curves, handle and can just quantify, device simplicity,
Operation is quick.Wherein, heavy phase is that the density of crude oil is determined using PVT, light phase CO2Density calculated using BWRS state equations
Arrive.However, when light phase is CO2With the mixture (CO of other components2Multicomponent system) when, its density can not be calculated by formula
Obtain, moreover, CO2There is also from non-mixed phase to mixed phase in itself during whole testing research with the mixture of other components
Dynamic process, the determination of its density is less useful for, therefore, CO can not be extrapolated using original interfacial tension test system2It is more
The minimum miscibility pressure of components system.
Utility model content
In order to solve the above-mentioned problems in the prior art, the utility model provides a kind of for determining CO2Multicomponent
The device of system minimum miscibility pressure, by setting HTHP densitometer in interfacial tension test system, can directly it read
Take CO2The density of multicomponent system, obtain CO under different pressures2The interfacial tension of multicomponent system, and then extrapolate CO2It is multigroup
The minimum miscibility pressure of split system.
The solution that the utility model uses is as follows：The utility model provides a kind of for determining CO2Multicomponent system
The device of minimum miscibility pressure, the device include：The crude supply system that is connected respectively with HTHP hanging drop interfacial tensimeter,
Carbon dioxide feed system, auxiliary agent feed system, HTHP densitometer and pumped vacuum systems；Wherein, the HTHP is close
Degree meter is used for CO in on-line determination HTHP hanging drop interfacial tensimeter2The density of multicomponent system, the pumped vacuum systems are used
In the vacuum of control device.
According to the utility model, the HTHP hanging drop interfacial tensimeter is the conventional selection in this area, according to one kind
Preferred embodiment, the HTHP hanging drop interfacial tensimeter include the hanging drop room provided with visual windows, amplifying camera system
And Computerized image processing system, the indoor top of the hanging drop room is provided with the probe for connecting the crude supply system, described
Picture signal is transmitted in the Computerized image processing system by amplifying camera system in the image of oil droplet on shooting probe.
It is further preferred that the HTHP hanging drop interfacial tensimeter also includes muff, the hanging drop room is arranged at
Outside.
According to the utility model, the crude supply system, carbon dioxide feed system, auxiliary agent feed system can refer to
Prior art selects, as long as can be transported to the hanging drop room and have the function that to control respective components inlet amount.
Preferably, the crude oil that the crude supply system includes being sequentially connected turns sample pump and crude oil sampling pump.
Preferably, the carbon dioxide feed system includes the booster pump and CO 2 vessels being sequentially connected, titanium dioxide
Carbon vessel is connected with the HTHP hanging drop interfacial tensimeter, and is connected with carbon dioxide gas on the CO 2 vessels
Bottle.
Preferably, the auxiliary agent feed system includes manual injector.
Preferably, the pumped vacuum systems includes vent line and vavuum pump, is connected with hanging drop room pipeline.
Preferably, the HTHP densitometer has two pipelines, and a by-pass line is connected to hanging drop room, another by-pass line
It is connected on the pipeline that pumped vacuum systems is connected with hanging drop room.
CO can be realized using device of the present utility model2The measure of multicomponent system minimum miscibility pressure, due to mixed phase
During CO2The density of multicomponent system does not follow linear rule, can not be calculated with empirical equation, pass through HTHP
The setting of densitometer, the CO of poised state under any temperature, pressure can be realized2The on-line determination of multicomponent system density, can
Directly read to obtain, obtain CO under different pressures2The interfacial tension of multicomponent system, and then calculate and obtain CO2Multicomponent system is most
Small miscible pressure.
Other features and advantages of the utility model will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
The utility model illustrative embodiments are described in more detail in conjunction with the accompanying drawings, it is of the present utility model on
State and other purposes, feature and advantage will be apparent.
Fig. 1 is a kind of embodiment of the present utility model for determining CO2Multicomponent system minimum miscibility pressure
The schematic diagram of device.
Fig. 2 is the graph of a relation of the pressure that Application Example 1 measures and interfacial tension.
Fig. 3 is the graph of a relation of the pressure that Application Example 2 measures and interfacial tension.
Fig. 4 is the graph of a relation of the pressure that Application Example 3 measures and interfacial tension.
Description of reference numerals
1st, crude supply system；2nd, carbon dioxide feed system；3rd, HTHP hanging drop interfacial tensimeter；4th, HTHP
Densitometer；5th, pumped vacuum systems；6th, auxiliary agent feed system；7th, crude oil turns sample pump；8th, crude oil sampling pump；9th, booster pump；10th, dioxy
Change carbon vessel；11st, dioxide bottle；12nd, hanging drop room；13rd, probe；14 visual windows；15th, light source；17th, amplifying camera system
System；18th, Computerized image processing system；19th, vent line；20th, vavuum pump；21st, manual injector.
Embodiment
To make the utility model easier to understand, it is new to describe this practicality in detail below in conjunction with embodiment
Type, these embodiments only serve illustrative, are not limited to the utility model.
According to exemplary for determining CO2The device of multicomponent system minimum miscibility pressure, as shown in figure 1, the device
By be connected respectively with HTHP hanging drop interfacial tensimeter 3 crude supply system 1, carbon dioxide feed system 2, auxiliary agent supply
System 6, HTHP densitometer 4 and pumped vacuum systems 5 form；Wherein, the HTHP densitometer 4 can on-line determination high temperature
CO in high pressure hanging drop interfacial tensimeter 32The density of multicomponent system, the pumped vacuum systems 5 are used for the vacuum of control device.
HTHP hanging drop interfacial tensimeter 3 includes the hanging drop room 12 provided with visual windows 14, the and of amplifying camera system 17
Computerized image processing system 18, the indoor top of hanging drop room 12 are provided with the probe 13 of connection crude oil sampling pump 8, amplifying camera system
System 17 can shoot the image of oil droplet on probe 13 through visual windows 14, and picture signal is transmitted in into Computer Image Processing system
System 18.
There is heater block can provide temperature needed for test for itself in hanging drop room 12, but in order to further avoid heat
The influence to test accuracy is lost in, muff (not shown) is set in the outside of hanging drop room 12.
The crude oil that crude supply system 1 includes being sequentially connected turns sample pump 7 and crude oil sampling pump 8.
Carbon dioxide feed system 2 includes the booster pump 9 and CO 2 vessels 10 being sequentially connected, and CO 2 vessels
Dioxide bottle 11 is connected with 10, CO 2 vessels 10 are connected to hanging drop room 12.
Pumped vacuum systems 5 includes vent line 19 and vavuum pump 20, is connected with the pipeline of hanging drop room 12.
HTHP densitometer 4 has two pipelines, and a by-pass line is connected to hanging drop room 12, and another by-pass line, which is connected to, to be taken out
On the pipeline that vacuum system 5 is connected with hanging drop room 12.
Auxiliary agent feed system 6 includes manual injector 21, is connected to hanging drop room 12.
In addition, also including pressure gauge and valve in device of the present utility model, it is configured, belongs to specific reference to needs
The conventional selection of this area, wherein, pressure gauge is used for the pressure of detection means, and by operating the switch of valve in an orderly manner, energy
Normal charging, blowing and emptying of enough realization devices etc..
In the utility model, each specific part can be the conventional selection of this area in device, will not be repeated here.
The specifically used method of Fig. 1 shown devices can include：
Device is vacuumized, and by by CO2Introducing device and discharge is multiple, to remove the air of remaining；Set high temperature
The measurement temperature of high pressure hanging drop interfacial tensimeter 3, when the temperature of hanging drop room 12 reaches design temperature, manually injector 21
Auxiliary agent is injected in hanging drop room 12, by CO2Introduce hanging drop room 12 and be forced into required pressure with booster pump 9, then slowly by crude oil
Hanging drop room 12 is pressed into, small oil droplet is formed at probe 13, when oil droplet soon comes off probe 13, is taken by amplifying camera system 17
Oil droplet picture, picture signal is reached into Computerized image processing system 18, in addition, remaining that HTHP hangs in experimentation
The connection of interfacial tensimeter 3 and HTHP densitometer 4 is dripped, the system for the treatment of reaches stable state and (often changes temperature or pressure reaches
At least balanced during one test point 30 minutes), CO is directly read from the display of HTHP densitometer 42Multicomponent system
Density value, and the density of crude oil can before mixed phase individually on HTHP densitometer 4 pass through bypath system sample-adding test.
In the application of the utility model device, CO2The determination method of multicomponent system interfacial tension and this area routine
Sessile drop method is identical, and the droplet formation parameter of probe tip is suspended on particular by measure, face is selected using propositions such as Andreas
Method calculates interfacial tension.Its mathematical modeling is
γ=Δ ρ de 2g/H(1)
1/H=f (ds/de)(2)
In formula：deFor the maximum gauge of hanging drop drop；G is gravity constant；Δ ρ is two-phase density contrast；dsIt is straight for selection face
Footpath, it is defined as being equal to d with hanging drop summit vertical rangeeWhen maximum gauge parallel lines meet at the length of droplet formation curve
Degree；1/H can be by ds/deValue is looked into tables of data and obtained.
Wherein, deAnd dsObtained by Computerized image processing system 18；Δ ρ is heavy phase (crude oil) and light phase (CO2It is more
Components system) density contrast, density of the heavy phase under different temperatures pressure can be by bypath system on HTHP densitometer
Measured in advance；The density of light phase can be directly read from HTHP densitometer.
The above-mentioned parameter for measuring or checking under same temperature and pressure is substituted into formula (1), this temperature can be calculated
With the two-phase interface tension value under pressure, and then calculate obtain CO2Multicomponent system minimum miscibility pressure.
In the application of the utility model device, auxiliary agent can be arbitrarily to CO2Minimum miscibility pressure has influential examination
Agent, for example, the auxiliary agent can be by C2-C6One or more of compositions formed in fatty alcohol, its can reduce crude oil with
CO2Minimum miscibility pressure.
Specifically, the auxiliary agent can be the group that following two or two or more components are sufficiently stirred mixing at 30-50 DEG C
Compound (material in each component is measured by percentage to the quality)：
Component 1：Ethanol 10-70%, propyl alcohol 30-90%；
Component 2：Ethanol 50-80%, amylalcohol 20-50%；
Component 3：Ethanol 20-33%, isopropanol 34-70%, hexanol 10-33%；
Component 4：Ethanol 50-90%, butanol 10-50%.
According to the application of the utility model device, the auxiliary agent is in CO2Mass concentration in multicomponent is 0~10%.
It will be illustrated below by test effect of the specific Application Example to the utility model device.
In following Application Example and Comparison study example：
The model FTA100 of HTHP interfacial tensimeter, purchased from ST companies.
The model DMA HP of HTHP densitometer, purchased from Anton Paar company, its be applied to 0~200 DEG C, 0~
70MPa。
CO2Produced by Beijing Hai Pubeifen gases Co., Ltd, purity 99.99%.
Crude oil is the dehydration degassed crude for being derived from waist English platform Oil Field.
Auxiliary agent is that the group that 30min obtains is stirred at 50 DEG C by ethanol, isopropanol and hexanol that mass ratio is the ︰ 1 of 2 ︰ 7
Compound, ethanol, isopropanol and hexanol therein are purchased from lark prestige Science and Technology Ltd., purity 99.7%.
Application Example 1
CO is determined using Fig. 1 shown devices2Minimum miscibility pressure, measure object are crude oil and CO2, 90 DEG C of temperature, pressure by
8MPa is increased to 27MPa, and specific test result is shown in Fig. 2, wherein, according to the interfacial tension under each pressure measured, calculate
To crude oil and CO2Minimum miscibility pressure is 26.86MPa.
Application Example 2
CO is determined using Fig. 1 shown devices2Multicomponent system minimum miscibility pressure, measure object are crude oil, CO2With concentration
For 1.3wt% auxiliary agent, 90 DEG C of temperature, pressure is increased to 20MPa by 8MPa, and specific test result is shown in Fig. 3, wherein, according to
Interfacial tension under each pressure measured, reckoning obtain crude oil and CO2The minimum miscibility pressure of multicomponent system is 19.29MPa.
Application Example 3
CO is determined using Fig. 1 shown devices2Multicomponent system minimum miscibility pressure, measure object are crude oil, CO2With concentration
For 8.8wt% auxiliary agent, 90 DEG C of temperature, pressure is increased to 12MPa by 8MPa, and specific test result is shown in Fig. 4, wherein, according to
Interfacial tension under each pressure measured, reckoning obtain crude oil and CO2The minimum miscibility pressure of multicomponent system is 11.02MPa.
Comparison study example 1
CO is determined using long tubule2With the minimum miscibility pressure of crude oil, it is specific determine device and method referring to (Xu Hanyuan,
Bear treasure slim-tube test methods determine that method [J] the inland rivers of minimum miscibility pressure are scientific and technological, 2012,6：92-93), measure object is original
Oil and CO2, determine crude oil and CO2Minimum miscibility pressure is 26.63MPa.
The CO measured using the utility model device2Minimum miscibility pressure (Application Example 1) using long tubule with being measured
Pressure value compare, both deviations are 0.23MPa, it was demonstrated that the accuracy of the utility model device, and this practicality is new
The device of type is equally applicable to CO2The measure of multicomponent system minimum miscibility pressure.
It is described above embodiment of the present utility model, described above is exemplary, and non-exclusive, and
It is also not necessarily limited to disclosed embodiment.In the case of the scope and spirit without departing from illustrated embodiment, led for this technology
Many modifications and changes will be apparent from for the those of ordinary skill in domain.
Claims (8)
1. one kind is used to determine CO2The device of multicomponent system minimum miscibility pressure, it is characterised in that the device includes：Respectively with
The crude supply system (1) of HTHP hanging drop interfacial tensimeter (3) connection, carbon dioxide feed system (2), auxiliary agent supply system
System (6), HTHP densitometer (4) and pumped vacuum systems (5)；Wherein, the HTHP densitometer (4) can on-line determination height
CO in warm high pressure hanging drop interfacial tensimeter (3)2The density of multicomponent system, the pumped vacuum systems (5) are used for control device
Vacuum.
2. device according to claim 1, it is characterised in that the HTHP hanging drop interfacial tensimeter (3) includes setting
There are hanging drop room (12), amplifying camera system (17) and the Computerized image processing system (18) of visual windows (14),
The indoor top of the hanging drop room (12) is provided with the probe (13) for connecting the crude supply system (1), and the amplification is taken the photograph
Picture system (17) is used for the image for shooting oil droplet on probe (13), and picture signal is transmitted in into the Computer Image Processing system
Unite (18).
3. device according to claim 2, it is characterised in that the HTHP hanging drop interfacial tensimeter (3) also includes
Muff, it is arranged at the outside of the hanging drop room (12).
4. according to the device described in any one in claim 1-3, it is characterised in that the crude supply system (1) includes
The crude oil being sequentially connected turns sample pump (7) and crude oil sampling pump (8).
5. according to the device described in any one in claim 1-3, it is characterised in that the carbon dioxide feed system (2)
Including the booster pump (9) and CO 2 vessels (10) being sequentially connected, CO 2 vessels (10) and the HTHP hanging drop
Interfacial tensimeter (3) is connected, and dioxide bottle (11) is connected with the CO 2 vessels (10).
6. according to the device described in any one in claim 1-3, it is characterised in that the auxiliary agent feed system (6) includes
Manual injector (21).
7. the device according to Claims 2 or 3, it is characterised in that the pumped vacuum systems (5) includes vent line (19)
With vavuum pump (20), it is connected with hanging drop room (12) pipeline.
8. device according to claim 7, it is characterised in that the HTHP densitometer (4) has two pipelines, and one
By-pass line is connected to hanging drop room (12), and another by-pass line is connected to the pipeline that pumped vacuum systems (5) is connected with hanging drop room (12)
On.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108562585A (en) * | 2018-06-26 | 2018-09-21 | 青岛科技大学 | A kind of measurement CO2The new method of mass tranfer coefficient between oil phase |
| WO2019144877A1 (en) * | 2018-01-23 | 2019-08-01 | 北京大学 | Method for evaluating mixing effect of co2 oil-displacing and mixing agent and method for screening co2 oil-displacing and mixing agent |
| RU2787871C2 (en) * | 2018-01-23 | 2023-01-13 | Пекин Юниверсити | Method for assessment of effect from mixing of agent for exclusion and mixing of oil, using co2, and method for selection of agent for exclusion and mixing of oil, using co2 |
-
2017
- 2017-03-31 CN CN201720334259.9U patent/CN206671293U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019144877A1 (en) * | 2018-01-23 | 2019-08-01 | 北京大学 | Method for evaluating mixing effect of co2 oil-displacing and mixing agent and method for screening co2 oil-displacing and mixing agent |
| US11506651B2 (en) | 2018-01-23 | 2022-11-22 | Peking University | Method for evaluating mixing effect of CO2 oil-displacing and mixing agent and method for screening CO2 oil-displacing and mixing agent |
| RU2787871C2 (en) * | 2018-01-23 | 2023-01-13 | Пекин Юниверсити | Method for assessment of effect from mixing of agent for exclusion and mixing of oil, using co2, and method for selection of agent for exclusion and mixing of oil, using co2 |
| CN108562585A (en) * | 2018-06-26 | 2018-09-21 | 青岛科技大学 | A kind of measurement CO2The new method of mass tranfer coefficient between oil phase |
| CN108562585B (en) * | 2018-06-26 | 2023-06-23 | 青岛科技大学 | Determination of CO 2 New method for mass transfer coefficient between oil phase and oil phase |
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