CN108982292A - Device and method based on Density Detection viscous crude stability - Google Patents
Device and method based on Density Detection viscous crude stability Download PDFInfo
- Publication number
- CN108982292A CN108982292A CN201810933594.XA CN201810933594A CN108982292A CN 108982292 A CN108982292 A CN 108982292A CN 201810933594 A CN201810933594 A CN 201810933594A CN 108982292 A CN108982292 A CN 108982292A
- Authority
- CN
- China
- Prior art keywords
- viscous crude
- density
- stability
- sample
- container
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/36—Analysing materials by measuring the density or specific gravity, e.g. determining quantity of moisture
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The present invention proposes a kind of device based on Density Detection viscous crude stability, including the container and penetron for holding viscous crude sample；The penetron includes at least one measuring probe, and is communicated with measuring probe to obtain the controller of measurement data.The present invention further provides a kind of methods based on Density Detection viscous crude stability the following steps are included: viscous crude to be measured is contained in container；Measuring probe is goed deep into container, the density of different depth viscous crude to be measured is measured；Upper layer viscous crude and the density absolute value of the difference of lower layer's viscous crude and the average value of density are calculated, the two is compared, with the stability for obtaining ratio characterization viscous crude.The present invention overcomes existing products cannot directly carry out the deficiency of Stability Determination to the viscous crude containing conductivity additive, for a kind of device and method for quickly, directly characterizing viscous crude stability.
Description
Technical field
The present invention relates to petroleum and petrochemical industry technical fields, are related to the characterization apparatus and method of a kind of viscous crude density stability, tool
Body is a kind of characterization apparatus and method based on Density Detection viscous crude stability.
Background technique
Currently, the colloform texture for viscous crude has been reached common understanding substantially, asphalitine constitutes the glue core of micelle, colloid absorption
Peptization is played in asphalitine, aromatic hydrocarbon is fine dispersion agent, and saturated hydrocarbons is poor solvent, is in outermost.Viscous crude conduct
One continuously distributed dynamic stability colloidal dispersion, in its exploitation, transport and last handling process, viscous crude colloidal dispersion stability
It is more easily damaged, asphalitine is caused to precipitate, blocking oil reservoir pore throat, oil well and pipeline cause reservoir damage, and recovery ratio reduces
And production cost is significantly increased.In petroleum refining process, in order to promote economic benefit, generally require poor thick of property
Oil and the preferable viscous crude of property carry out blending processing.It therefore, can letter using a kind of method in petrochemical industry scientific research, production process
Just the colloid-stabilised implementations for symbolizing viscous crude system quickly and accurately are of great significance.
Viscous crude appearance is black, and translucency is very poor, and very sticky, so it is relatively difficult to characterize its colloidal stability.
It is opaque for viscous crude at present, the problems such as to the asphaltene precipitation inconvenient observation wherein generated, generallys use and be added into viscous crude
N-alkane is diluted viscous crude sample, asphaltene precipitation is come out as precipitating reagent.Research and utilization precipitating reagent destroys viscous crude
Stability, the weight ratio of the n-alkane and viscous crude that are added when being collapsed with viscous crude system stability, asphalitine coagulation occurred is (just
Structure alkane/viscous crude oil sample) the colloidal stability parameter as mink cell focus, but the colloid still without characterization heavy oil-proofness at present
The direct method of stability, and the colloidal stability parameter is a relative value.
Frequently with method mainly drip diffusion method and Mass fraction normalized conductivity method etc..Drop diffusion method be it is a kind of can simply just
The prompt method for determining viscous crude colloidal stability observes oil sample drop on filter paper, if it is equal that a color is presented on filter paper
Even spot, then the oil sample is to stablize oil sample；If forming the concentric circles that internal color is deep, exterior color is shallow on filter paper, say
Bright asphalitine has occurred and that coagulation, oil sample are unstable.Although it is easy to drip diffusion method, rely on eye-observation, subjective factor is big.
Electrically charged asphalitine micelle makes viscous crude have certain electric conductivity, and electrical conductivity method is exactly to utilize conductivity in system
Variation judge the generation of coagulation point.Normal heptane is added into viscous crude to be diluted, will lead to the decline of viscous crude solution viscosity,
All increase the conductivity of system, mass fraction normalized conductivity.Only when asphalitine coagulation, the mass fraction normalized conductivity of system is
It can decline.Therefore, the maximum value of mass fraction normalized conductivity can be used as viscous crude system asphalitine coagulation and indicate.But for
The low oil sample of asphalt content, signal response intensity is lower, and for the oil containing surfactant and various additives
Sample is also not suitable for, because various additives and auxiliary agent will affect the response of its signal.
In conclusion the method for current characterization viscous crude colloidal stability all has some disadvantages, also need further to study
It improves, finds a kind of method for capableing of quick, convenient, accurate measurement viscous crude colloidal stability.
Summary of the invention
It is an object of the invention to be directed to the deficiency for being directed to viscous crude stability characterizing method in the prior art in the prior art,
It is proposed that a kind of monitoring is convenient, the accurate viscous crude stability characterizing method of result.
To achieve the goals above, the present invention provides the following technical scheme that
Based on the device of Density Detection viscous crude stability, including the container and penetron for holding viscous crude sample；
The penetron includes at least one measuring probe, and is communicated with measuring probe to obtain the controller of measurement data.
As preferred: device further comprises for carrying out temperature controlled temperature control device to container.
As preferred: container is tubulose, and tube wall is double-layer structure, is cavity, tube wall between inner layer tube wall and outer wall
On be provided with the liquid entrance being connected to cavity and liquid outlet, intracavitary to be provided with liquid, temperature control device is connect with lumen, with control
Make the temperature of intracavitary liquid.
As preferred: device further comprises support frame, is provided with support rod on support frame as described above, the measuring probe with
Support rod connection.
As preferred: support boom end includes a bell and spigot joint, and bell and spigot joint is set on the support frame, so that support rod can be along branch
The lifting of support short transverse, can further make measuring probe go deep into the different depth of container.
As preferred: being provided with mounting rope sling on measuring probe, mounting rope sling can be hung on support rod.
Based on the method for Density Detection viscous crude stability, it is based on above-mentioned apparatus, comprising the following steps:
Viscous crude to be measured is contained in container；
Measuring probe is goed deep into container, the density of different depth viscous crude to be measured is measured；
Upper layer viscous crude and the density absolute value of the difference of lower layer's viscous crude and the average value of density are calculated, the two is compared, with obtaining
Obtain the stability of ratio characterization viscous crude.
As preferred: before further including steps of measurement viscous crude density, carrying out temperature control to container, reach viscous crude
Experimental temperature.
As preferred: further including steps of after viscous crude reaches experimental temperature, carry out the static place of constant temperature to container
Reason.
As preferred: if the ratio of the average value A of the density contrast and density of upper layer viscous crude and lower layer's viscous crude is less than setting
Threshold value, then it is assumed that viscous crude is stablized.
Compared with prior art, the advantages and positive effects of the present invention are:
(1) the present invention overcomes existing products cannot directly carry out Stability Determination to the viscous crude containing conductivity additive
Deficiency, provide it is a kind of quickly, the method for directly characterization viscous crude stability.System according to upper and lower level under viscous crude static conditions
Composition will change, thus upper and lower level density will also generate the substantive characteristics of difference, to the density values of viscous crude upper and lower level into
Row measurement compares, to characterize viscous crude system stability.
(2) test temperature has the density of viscous crude system and significantly affects.Therefore devise can be to upper and lower level body by the present invention
System carries out the heating system of constant temperature and control, and the device of detection temperature and the device of control temperature are provided in heating system, from
And realize and the temperature of system is accurately controlled, keep the temperature of the upper and lower layer of test system identical, it can also be real using the present apparatus
Now under different temperatures, in the case where the diluted situation of n-alkane is not added, the progress of the stability of viscous crude is directly characterized.
(3) present invention research realizes at a certain temperature, directly, quickly utilizes the method for oil sample upper and lower level density variation
Viscous crude stability is characterized, it is easy to operate, and can be used for real time on-line monitoring.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is structural schematic diagram of the invention；
Fig. 3 is measurement bottom sample structural schematic diagram；
Fig. 4 is that electrical conductivity method characterizes colloidal stability experimental result picture.
Wherein: 1, sample cell；2, measuring probe；3, controller；4, conducting wire；5, temperature control device；6, support frame；601, it supports
Bar；602, bell and spigot joint；7, rope sling is mounted.
Specific embodiment
Hereinafter, a specific embodiment of the invention is further described in conjunction with attached drawing.
Viscous crude stability characterization problems are the hot issues of viscous crude research field.In the colloform texture of viscous crude, asphalitine
And the part solvent on its surface is adsorbed on as dispersed phase, remaining solvent is made as decentralized medium, entire viscous crude system
For a continuously distributed dynamic stability colloidal dispersion, the upper and lower level of oil sample should be the state of stable homogeneous at this time, oil sample it is upper
Lower layer density value is identical or there are fine differences.Asphalitine is most heavy as viscous crude middle-molecular-weihydroxyethyl, the maximum component of polarity, is easy hair
Raw aggregation, when more and more asphaltene aggregations become larger and since gravity settles downwards, the asphalitine on oil sample upper layer at this time
Content tails off, and oil sample lower layer deposited a large amount of asphalitine, and the upper and lower layer density of oil sample should will appear significant difference, on oil sample
Layer density value is greater than oil sample lower layer density value.
Present invention firstly provides a kind of device based on Density Detection viscous crude stability, structure with specific reference to Fig. 1 extremely
Fig. 3.
Device based on Density Detection viscous crude stability includes the container and penetron for holding viscous crude sample.
In the present embodiment, it is sample cell 1 that container, which uses, and the tube wall of sample cell 1 is double-layer structure, inner layer tube wall and outer layer
It is cavity 101 between tube wall, the liquid entrance 102 being connected to cavity 101 and liquid outlet 103, cavity 101 is provided on tube wall
It is provided with liquid in cavity, in the present embodiment, using is liquid water.
Penetron includes at least one measuring probe 2, and communicates with measuring probe 2 to obtain the control of measurement data
Device 3.It is connected between measuring probe 2 and controller 3 by conducting wire 4.
When test, the density value on oil sample upper layer, the close of one step surveying oil sample lower layer of going forward side by side are measured by measuring probe 2 first
Angle value measures the upper and lower layer density value difference of oil sample by using densimeter to indicate the coagulation of viscous crude system asphalitine, to characterize
The colloidal stability of viscous crude.
In order to keep measurement result more acurrate, device further comprises for carrying out temperature controlled temperature control device 5 to container.
Temperature control device 5 is connect with lumen in the present embodiment, with the temperature of liquid in control chamber.Specifically, it is arranged inside temperature control device 5
There are pipeline and heating apparatus, pipeline and liquid entrance 102 and liquid outlet 103 are connected, so that liquid can be in 5 He of temperature control device
It circulates between sample cell 1, and then guarantees the liquid constant temperature in official jargon 101.
Further, in order to solve the problems, such as that measuring probe 2 is arranged, device further comprises support frame 6, support frame 6
On be provided with support rod 601, measuring probe 2 is connect with support rod 601.
A kind of liftable support rod is further designed with reference to Fig. 1 in order to solve the problems, such as measurement different layers viscous crude data
601 structure, 601 end of support rod include a bell and spigot joint 602, and bell and spigot joint is sleeved on support frame 6, so that support rod 601 can
It is gone up and down along 6 short transverse of support frame, this structure can further allow measuring probe 2 go deep into the different depth of container.
Referring to figs. 2 and 3, the mobile embodiment of another measuring probe 2 is further additionally provided.Measuring probe is enterprising
A mounting rope sling 7 is arranged in one step, and mounting rope sling 7 can be hung on support rod 601.When measuring upper layer viscous crude density, mounting rope
Set 7 keeps hanging on support rod 601；When measuring lower layer's viscous crude density, mounting rope sling 7 is taken from support rod 601, and measurement is visited
First 2 lean on the length of conducting wire 4, can go deep into 1 lower layer of sample cell.
Based on apparatus above, invention further provides a kind of methods based on Density Detection viscous crude stability, including
Following steps:
(1) viscous crude to be measured is contained in container；Heavy oil sample amount can use 350mL or so.
(2) before measuring viscous crude density, temperature control is carried out to container, viscous crude is made to reach experimental temperature.In order to not influence viscous crude spy
Property, and making it that preferable colloidality can be presented, measurement temperature takes 30 DEG C and 40 DEG C.
After viscous crude reaches experimental temperature, the static processing of constant temperature is carried out to container, stablizes it further.Constant temperature processing
Time at 15 minutes or more, makes the viscous crude sample in sample cell reach equilibrium state.
(3) measuring probe is goed deep into container, measures the density of different depth viscous crude to be measured；And upper layer viscous crude is calculated under
The layer density contrast of viscous crude and the average value of density, the two is compared, with the stability for obtaining ratio characterization viscous crude.If upper layer viscous crude
It is less than the threshold value of setting with the ratio of the average value of the density contrast and density of lower layer viscous crude, then it is assumed that viscous crude is stablized.
The method of the difference of view apparatus structure, measurement is different.Specifically, if the structure of mounting rope sling 7, upper layer is measured
When density, mounting rope sling 7 is kept to hang on support rod 601, when measuring lower layer density, mounting rope sling 7 is removed, is prevented in sample
In pipe 1.If not mounting the structure of rope sling 7, when measuring the upper and lower density, need to adjust the position of bell and spigot joint 602.
The core of the method for density characterization is the stable calculation for carrying out sample cell the upper and lower viscous crude oil sample: taking and is surveyed
Difference and sample cell upper layer and the sample cell lower layer density numerical value of the density values on the sample cell upper layer and sample cell lower layer oil sample that obtain
And average value between ratio (i.e. the relative quantity of density variation) measure in sample cell viscous crude in the case where setting heating temperature
Stability.
Calculation formula is as follows:
ρ1--- density measurement of the densimeter measuring probe 2 on 1 upper layer of sample cell；
ρ2--- density measurement of the densimeter measuring probe 2 in 1 lower layer of sample cell；
|ρ1-ρ2| embody the otherness of density measurement between 1 lower layer of 1 upper layer of sample cell and sample cell.
The average value of density measurement between 1 lower layer of 1 upper layer of sample cell and sample cell.Δ numerical value embodies
For oil sample upper and lower level difference to the relative scale of oil sample upper and lower level density measure average value, it is relative density difference that we, which define Δ,.Δ
Numerical value is smaller, shows that the difference of oil sample upper and lower level is smaller, i.e., oil sample is stabilising system, system layering does not occur；Δ numerical value is got over
Greatly, show that the difference of oil sample upper and lower level is bigger, i.e., oil sample is Unstable Systems, system layering phenomenon occurs.
In the research process, the density of sample is measured using the portable density measuring instrument of high precision, instrument
Resolution ratio is 0.0001g/cm3.To the oil sample studied, the stability of oil sample density can be analyzed using two methods, the
One: when oil sample upper layer and oil sample lower layer density numerical value difference are less than 0.0030g/cm3Show the density contrast of the upper and lower layer of the system
It is different smaller, then it is assumed that for viscous crude system studies on asphaltene there is no apparent coagulation, viscous crude system is relatively stable；Second: on oil sample
When layer and oil sample lower layer density relative different ratio are less than 0.38%, also indicate that viscous crude system is relatively stable；When oil sample upper layer
It is greater than 0.0030g/cm with oil sample lower layer density numerical value difference3Or oil sample upper layer and oil sample lower layer density relative different ratio are greater than
When 0.38%, show that the density variation of the upper and lower layer of the system is larger, then it is assumed that viscous crude system studies on asphaltene has occurred that bright
Aobvious coagulation, and since gravity continues to settle downwards, viscous crude system is unstable.
In order to verify the reliability of this method, take identical oil sample, be heated to identical temperature, by method of the invention with
Traditional drop method of diffusion is compared.
Drip the specific practice of diffusion method are as follows: viscous crude is stirred evenly, takes one after another drop of at filter paper center, drop will be diffused as justifying
Shape.If this is diffused on diffusion shape and color intensity and is consistent, show that mink cell focus is more stable；When viscous crude studies on asphaltene goes out
When existing coagulation, then asphalitine cannot be mobile with oil sample, will occur asphalitine flocculation on filter paper, is a pitch among diffuser
The aterrimus that matter coagulation body is formed is round, and outside is the light color circle formed by solvent in viscous crude.
Four kinds of viscous crude oil sample A, B, C, D are prepared, the steadiness of four kinds of oil samples are measured using drop diffusion method, wherein A, B
To stablize oil sample (i.e. without asphaltene deposits phenomenon), C, D are unstable oil sample (i.e. apparent asphaltene deposits have occurred for oil sample).
Embodiment 1
It takes certain original viscous crude oil sample 124.35g to be fitted into sample cell 1, takes 272ml normal heptane to be packed into examination with graduated cylinder correct amount
In agent bottle.30 DEG C of heating temperature are set by temperature control device 5, the temperature of the liquid in 1 lumen 101 of sample cell and temperature control is kept to fill
It is identical to set the temperature set in 5, to realize the heating of viscous crude oil sample and constant temperature processing in sample cell.The examination of normal heptane will be housed
Agent bottle and the densitometer probe 2 after being wrapped up with waterproof plastic are put into together in temperature control device 5, realize normal heptane solvent and densimeter
The heated constant temperature processing of probe 2.Constant temperature is carried out to viscous crude oil sample, normal heptane solvent and densitometer probe 2 to handle 30 minutes, will be added
Heat to 30 DEG C of normal heptane solvent is slowly added drop-wise in oil sands bitumen oil sample, is stirred evenly when being added dropwise with glass bar, thus
Viscous crude oil sample A has been made.
Test carries out upper and lower layer density values measurement using to oil sample A obtained, reads densitometer probe 2 respectively in oil
When sample upper layer and oil sample lower layer, data shown by portable density instrument.
1 sample A related data of table
Embodiment 2
It takes original viscous crude oil sample 124.65g to be fitted into sample cell 1, takes 273ml normal heptane to be packed into reagent with graduated cylinder correct amount
In bottle.40 DEG C of heating temperature are set by thermostatic water bath, keeps the temperature and thermostatic water bath of the liquid in 1 lumen 101 of sample cell
The temperature of interior setting is identical, to realize the heating of viscous crude oil sample and constant temperature processing in sample cell.The reagent of normal heptane will be housed
Bottle and the densitometer probe 2 after being wrapped up with waterproof plastic are put into together in temperature control device 5, realize that normal heptane solvent and densimeter are visited
First 2 heated constant temperature processing.Constant temperature is carried out to oil sands bitumen oil sample, normal heptane solvent and densitometer probe 2 to handle 30 minutes, it will
It is heated to 40 DEG C of normal heptane solvent to be slowly added drop-wise in oil sands bitumen oil sample, be stirred evenly when being added dropwise with glass bar, from
And viscous crude oil sample B is made.
Test carries out upper and lower layer density values measurement using to oil sample B obtained, reads densitometer probe 2 respectively in oil
When sample upper layer and oil sample lower layer, data shown by portable density instrument.
2 sample B related data of table
Embodiment 3
It takes original viscous crude oil sample 83.73g to be fitted into sample cell 1, takes 305ml normal heptane to be packed into reagent bottle with graduated cylinder correct amount
In.30 DEG C of heating temperature are set by thermostatic water bath, keep the temperature and constant temperature of the liquid in the peripheral temperature control device 5 of sample cell 1
The temperature set in sink is identical, to realize the heating of viscous crude oil sample and constant temperature processing in sample cell.Normal heptane will be housed
Reagent bottle and the densitometer probe 2 after being wrapped up with waterproof plastic are put into thermostatic water bath together, realize normal heptane solvent and density
The heated constant temperature processing of instrument probe 2.Constant temperature is carried out to oil sands bitumen oil sample, normal heptane solvent and densitometer probe 2 and handles 30 points
Clock would be heated to 30 DEG C of normal heptane solvent and slowly be added drop-wise in oil sands bitumen oil sample, be stirred when being added dropwise with glass bar
It is even, so that viscous crude oil sample C be made.
Test carries out upper and lower layer density values measurement using to oil sample C obtained, reads densitometer probe 2 respectively in oil
Data shown by portable density instrument when sample upper layer and oil sample lower layer.
3 sample C related data of table
Embodiment 4
It takes original viscous crude oil sample 83.97g to be fitted into sample cell 1, takes 306ml normal heptane to be packed into reagent bottle with graduated cylinder correct amount
In.40 DEG C of heating temperature are set by thermostatic water bath, is kept in temperature and the temperature control device 5 of the liquid in 1 lumen 101 of sample cell
The temperature of setting is identical, to realize the heating of viscous crude oil sample and constant temperature processing in sample cell.The reagent bottle of normal heptane will be housed
It is put into temperature control device 5 together with the densitometer probe 2 after being wrapped up with waterproof plastic, realizes normal heptane solvent and densitometer probe
2 heated constant temperature processing.Constant temperature is carried out to oil sands bitumen oil sample, normal heptane solvent and densitometer probe 2 to handle 30 minutes, will be added
Heat to 40 DEG C of normal heptane solvent is slowly added drop-wise in oil sands bitumen oil sample, is stirred evenly when being added dropwise with glass bar, thus
Viscous crude oil sample D has been made.
Test carries out upper and lower layer density values measurement using to oil sample D obtained, reads densitometer probe 2 respectively in oil
Data shown by portable density instrument when sample upper layer and oil sample lower layer.
4 sample D related data of table
Determine four kinds of colloidal stabilities different oil sample A, B, C, D respectively from embodiment 1 to embodiment 4, wherein A and B
To stablize oil sample (not having asphalitine coagulation in system), C and D are that unstable oil sample (has a large amount of asphalitine coagulation analysis in system
Out).
For these four samples, A, B are to stablize oil sample, and the upper and lower density values difference of A and B oil sample is less than
0.0030g/cm3, the upper and lower layer density relative different of oil sample is less than 0.38%；C and D oil sample belongs to Unstable Sample, they
The upper and lower density values difference is greater than 0.0030g/cm3, and the upper and lower layer density relative different of oil sample is greater than 0.38%.
Therefore when oil sample upper layer or oil sample lower layer density numerical value difference are less than under 0.0030g/cm3 or oil sample upper layer and oil sample
When layer density relative different ratio is less than 0.38%, show that the density variation of the upper and lower layer of the system is smaller, then it is assumed that viscous crude body
It is relatively stable；When oil sample upper layer or oil sample lower layer density numerical value difference are greater than 0.0030g/cm3 or oil sample upper layer and oil sample
When lower layer density relative different ratio is greater than 0.38%, show that the density variation of the upper and lower layer of the system is larger, then it is assumed that viscous crude
System is unstable.
By the various embodiments described above as it can be seen that using experimental rig established by the present invention, may be implemented to stablize viscous crude sample,
The characterization of the colloidal stability of unstable viscous crude sample, characterization result and the drop diffusion method for using this research field to accept extensively
Characterization result is consistent.Show that the present invention is feasible.
Embodiment 5
E, F viscous crude sample containing additive are chosen, first with the stability of drop diffusion method study sample, discovery E is steady
Random sample product；F is Unstable Sample.
Fully according to the step and method in embodiment 4, the density value of the two kinds of viscous crude oil sample the upper and lower E, F is obtained,
Viscous crude oil sample upper and lower level density variation value is calculated and compared.
For the present embodiment unlike embodiment before, E, F sample contain a certain amount of ionic surfactant ---
Neopelex since neopelex has certain electric conductivity, cannot utilize quality in the case
Score electrical conductivity method characterizes the colloidal stability of sample, is characterized using the densimetry that the present invention establishes, and ties
Fruit discovery still can use the densimetry that the present invention establishes and characterized even if containing conductive surface's activating agent in sample:
5 sample E, F related data of table
Using drop diffusion method research shows that: E be stablize sample；F is Unstable Sample.
When oil sample is to stablize sample, the density difference of upper and lower level is less than 0.0030g/cm3, upper and lower level density variation rate
Less than 0.38%；
When oil sample is Unstable Sample, the density difference of upper and lower level is greater than 0.0030g/cm3, upper and lower level density variation
Rate is greater than 0.38%.
I.e. this method research shows that: E be stablize sample；F and G is Unstable Sample.It is consistent with the drop result of diffusion method.
The oil-sand drip containing conductivity additive and without containing conductivity additive is characterized using Mass fraction normalized conductivity method
The colloidal stability of green oil sample, measurement result are as shown in Figure 2.
From fig. 4, it can be seen that normal heptane ought be added to not being added in the oil sands bitumen of conductivity additive, under the viscosity of system
The mass fraction normalized conductivity of drop, system increases；When normal heptane ratio is 2.17 times, matter caused by system studies on asphaltene coagulation
The influence that score conductivity decline degree is greater than system viscosity is measured, thus the mass fraction normalized conductivity of system declines, it should (just
Heptane/oil sample) ratio can be used as the colloidal stability parameter of system.Because system is more stable, the stability of the system is destroyed
(normal heptane/oil sample) ratio when needing to be added the normal heptane of greater proportion, thus mass fraction normalized conductivity maximum value occur can
Using the colloidal stability parameter as the oil sample.
And the oil sands bitumen sample for joined conductivity additive, due in system containing conductive additive,
Thus during with normal heptane dilute sample, the electric conductivity of system is other than from oil sample, and there are also parts from leading
The mass fraction conductance of the oil sands bitumen oil sample of neopelex is added by can be seen that in figure for the contribution of electrical additive
The oil sands bitumen oil sample of neopelex is not added significantly greater than in rate value, illustrates that neopelex also has one
Determine electric conductivity, so that oil sample system quality score conductivity value is higher, influences the measurement of asphalitine coagulation point, that is, use mass fraction
Conductivity cannot characterize the oil sample containing conductivity additive.
The above described is only a preferred embodiment of the present invention, being not that the invention has other forms of limitations, appoint
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
It imitates embodiment and is applied to other fields, but without departing from the technical solutions of the present invention, according to the technical essence of the invention
Any simple modification, equivalent variations and remodeling to the above embodiments, still fall within the protection scope of technical solution of the present invention.
Claims (10)
1. the device based on Density Detection viscous crude stability, it is characterised in that: including container for holding viscous crude sample and close
Spend measuring instrument；The penetron includes at least one measuring probe, and communicates with measuring probe to obtain measurement data
Controller.
2. the device as described in claim 1 based on Density Detection viscous crude stability, it is characterised in that: described device is further
Including for carrying out temperature controlled temperature control device to container.
3. the device based on Density Detection viscous crude stability as described in right wants 2, it is characterised in that: the container is tubulose,
Tube wall is double-layer structure, is cavity between inner layer tube wall and outer wall, is provided with the liquid entrance being connected to cavity on tube wall
It is exported with liquid, intracavitary to be provided with liquid, temperature control device is connect with lumen, with the temperature of liquid in control chamber.
4. the device as described in claim 1 based on Density Detection viscous crude stability, it is characterised in that: described device is further
Including support frame, support rod is provided on support frame as described above, the measuring probe is connect with support rod.
5. the device as claimed in claim 4 based on Density Detection viscous crude stability, it is characterised in that: the support boom end
Including a bell and spigot joint, bell and spigot joint is set on the support frame, so that support rod can be gone up and down along support frame short transverse, can further make
Measuring probe gos deep into the different depth of container.
6. the device as claimed in claim 4 based on Density Detection viscous crude stability, it is characterised in that: be arranged on measuring probe
There is mounting rope sling, mounting rope sling can be hung on support rod.
7. special based on device described in any one of claim 1 to 6 based on the method for Density Detection viscous crude stability
Sign is, comprising the following steps:
Viscous crude to be measured is contained in container；
Measuring probe is goed deep into container, the density of different depth viscous crude to be measured is measured；
Upper layer viscous crude and the density absolute value of the difference of lower layer's viscous crude and the average value of density are calculated, the two is compared, with acquisition ratio
The stability of value characterization viscous crude.
8. the method as claimed in claim 7 based on Density Detection viscous crude stability, which is characterized in that further comprise following
Step: before measurement viscous crude density, temperature control is carried out to container, viscous crude is made to reach experimental temperature.
9. the method as claimed in claim 8 based on Density Detection viscous crude stability, which is characterized in that further comprise following
Step: after viscous crude reaches experimental temperature, the static processing of constant temperature is carried out to container.
10. the method as claimed in claim 7 based on the original stability of Density Detection, which is characterized in that if upper layer viscous crude with
The ratio of the average value of the density contrast and density of lower layer's viscous crude is less than the threshold value of setting, then it is assumed that viscous crude is stablized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810933594.XA CN108982292A (en) | 2018-08-16 | 2018-08-16 | Device and method based on Density Detection viscous crude stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810933594.XA CN108982292A (en) | 2018-08-16 | 2018-08-16 | Device and method based on Density Detection viscous crude stability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108982292A true CN108982292A (en) | 2018-12-11 |
Family
ID=64552822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810933594.XA Pending CN108982292A (en) | 2018-08-16 | 2018-08-16 | Device and method based on Density Detection viscous crude stability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108982292A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112082903A (en) * | 2020-08-11 | 2020-12-15 | 西安工程大学 | Method for detecting heat sensitivity of substance |
| CN114076782A (en) * | 2020-08-20 | 2022-02-22 | 中国石油化工股份有限公司 | Method and device for representing stability of crude oil emulsion |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788738A (en) * | 2012-09-03 | 2012-11-21 | 北京理工大学 | Ultrasonic array detection method for multi-phase liquid density and concentration |
| CN102818881A (en) * | 2012-08-21 | 2012-12-12 | 中国石油大学(北京) | High-density oil testing work liquid sedimentation stability test device and method |
| CN103868959A (en) * | 2014-04-04 | 2014-06-18 | 中国石油大学(华东) | Device and method for representing stability of heavy oil |
| CN104764678A (en) * | 2015-04-14 | 2015-07-08 | 中国石油大学(华东) | Method for judging storage stability of heavy oil |
| CN206638626U (en) * | 2017-04-27 | 2017-11-14 | 中国石油大学(华东) | A kind of device based on ultrasound detection heavy oil-proofness |
| CN108267506A (en) * | 2016-12-30 | 2018-07-10 | 中国石油天然气股份有限公司 | Device and method for representing stability of heavy oil |
-
2018
- 2018-08-16 CN CN201810933594.XA patent/CN108982292A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818881A (en) * | 2012-08-21 | 2012-12-12 | 中国石油大学(北京) | High-density oil testing work liquid sedimentation stability test device and method |
| CN102788738A (en) * | 2012-09-03 | 2012-11-21 | 北京理工大学 | Ultrasonic array detection method for multi-phase liquid density and concentration |
| CN103868959A (en) * | 2014-04-04 | 2014-06-18 | 中国石油大学(华东) | Device and method for representing stability of heavy oil |
| CN104764678A (en) * | 2015-04-14 | 2015-07-08 | 中国石油大学(华东) | Method for judging storage stability of heavy oil |
| CN108267506A (en) * | 2016-12-30 | 2018-07-10 | 中国石油天然气股份有限公司 | Device and method for representing stability of heavy oil |
| CN206638626U (en) * | 2017-04-27 | 2017-11-14 | 中国石油大学(华东) | A kind of device based on ultrasound detection heavy oil-proofness |
Non-Patent Citations (1)
| Title |
|---|
| 孙云峰: ""重质油胶体稳定性表征方法探索"", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112082903A (en) * | 2020-08-11 | 2020-12-15 | 西安工程大学 | Method for detecting heat sensitivity of substance |
| CN114076782A (en) * | 2020-08-20 | 2022-02-22 | 中国石油化工股份有限公司 | Method and device for representing stability of crude oil emulsion |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108627533A (en) | Fluid employs the nuclear magnetic resonance experiment method and device of feature in a kind of measurement porous media | |
| Torsæter et al. | Experimental reservoir engineering laboratory workbook | |
| CN108982292A (en) | Device and method based on Density Detection viscous crude stability | |
| CN112986097B (en) | Experimental measurement method for determining relative permeability curve of tight reservoir steady state method | |
| CN207280981U (en) | A kind of portable crude oil water containing analytical equipment | |
| CN104142290A (en) | Rock sample bulk volume and variable density determination apparatus and method thereof | |
| CN109254134B (en) | Novel method and equipment for measuring rock resistance and indicating oil gas breakthrough pressure | |
| CN106525664B (en) | A kind of capillary effect automatically determines equipment | |
| CN216284777U (en) | Test device capable of measuring soil moisture and rock collapse resistance | |
| CN108169079A (en) | The dynamic measurement method of interfacial tension between two kinds of liquid | |
| CN103868959B (en) | The device and method that a kind of mink cell focus stability characterizes | |
| CN108267506A (en) | Device and method for representing stability of heavy oil | |
| CN110487835B (en) | Novel method for calculating reservoir saturation index of compact oil and gas reservoir | |
| CN108226192A (en) | Method for acquiring morphological characteristics of acid-etched cracks | |
| JP2003329625A (en) | Method of detecting soil pollution caused by organic liquid substance | |
| CN206696134U (en) | A kind of engine motor oil viscosity detecting device of detectable assigned temperature | |
| US3508148A (en) | In-place soil water conductivity tester | |
| Wistuba et al. | Adhesion of bitumen: Screening and evaluating laboratory testing techniques | |
| Fadeeva et al. | Investigation of the phosphoric acid-N, N-dimethylformamide system as potential solvent for cellulose | |
| CN218726371U (en) | Asphalt kinematic viscosity detector | |
| CN109212004A (en) | Hydrogen experimental detection device and detection method are surveyed in the quick-fried performance drain of glassed steel squama | |
| CN206848131U (en) | Imbibition experimental provision and its system | |
| CN202195999U (en) | Device for measuring height difference between liquid levels | |
| CN207423862U (en) | A kind of pipe type oil water mixing continuous monitoring device | |
| RU2333482C1 (en) | Method for testing depth of concrete articles impregnation and device to this effect |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181211 |
|
| RJ01 | Rejection of invention patent application after publication |