CN106092830A - A kind of devices and methods therefor studying carbon dioxide diffusion leading edge - Google Patents
A kind of devices and methods therefor studying carbon dioxide diffusion leading edge Download PDFInfo
- Publication number
- CN106092830A CN106092830A CN201610647251.8A CN201610647251A CN106092830A CN 106092830 A CN106092830 A CN 106092830A CN 201610647251 A CN201610647251 A CN 201610647251A CN 106092830 A CN106092830 A CN 106092830A
- Authority
- CN
- China
- Prior art keywords
- carbon dioxide
- diffusion
- leading edge
- interface
- formula
- 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
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
Abstract
The invention provides a kind of devices and methods therefor studying carbon dioxide diffusion leading edge.The device of this research carbon dioxide diffusion leading edge includes carbon dioxide injection system, detecting system and liquid injection system；Described carbon dioxide injection system includes dioxide bottle；Described detecting system includes transparent detection pipe and for the interface connected with exterior tubing, and described interface includes first interface and the second interface；Described liquid injection system includes liquid container；Wherein, described gas cylinder connects with first interface, and described first interface connects with one end of transparent detection pipe, the other end of described transparent detection pipe and the second orifice, and described second interface connects with liquid container.This experimental provision can be implemented in line and measures, and has the advantages that speed is fast, highly sensitive, provides new approach for desk research carbon dioxide dispersal behavior.
Description
Technical field
The invention belongs to oil extraction in oil field gas field of engineering technology, particularly relate to a kind of dress studying carbon dioxide diffusion leading edge
Put and method.
Background technology
The dispersal behavior of carbon dioxide carbon dioxide injection at the scene raising recovery ratio and safe Geological storage thereof rise emphatically
The effect wanted, forefathers have done substantial amounts of work.Just determining temperature as far back as Renner in 1988 is 38 DEG C, pressure
Power is carbon dioxide diffusion coefficient in the NaCl solution that concentration is 0.25N when 1544-5833KPa, and L.-S.Wang etc. exists
Within 1996, obtain carbon dioxide diffusion coefficient in NaCl solution and octane at different temperatures and pressures by experiment,
Within 2008, M.Bahar and K.Liu has obtained carbon dioxide diffusion system in formation water by the drop of pressure in diffusion process
Number, Min Hao etc. combines nuclear magnetic resonance technique, has obtained carbon dioxide diffusion coefficient in porous media.
In diffusion process, diffusion coefficient no doubt plays an important role, but carbon dioxide along journey concentration distribution and
Monitoring to leading edge is also very important.On the one hand monitoring carbon dioxide migration and displacing front can be deepened carbon dioxide
Drive the understanding improving recovery ratio, effect that carbon dioxide for a long time bury is more accurately predicted；On the other hand can also be oil field
Solution formulation foundation is provided, reach to improve the maximum recovery ratio of displacement efficiency and sweep efficiency, acquisition and carbon dioxide buried
Amount, the purpose of prediction carbon dioxide breakthrough time.Regrettably there is presently no pertinent literature and relate in this respect, this is to research
Carbon dioxide dispersal behavior is a vacancy the biggest.
Summary of the invention
For solving the problems referred to above, it is an object of the invention to provide a kind of device studying carbon dioxide diffusion leading edge and side thereof
Method.
For reaching above-mentioned purpose, the invention provides a kind of device studying carbon dioxide diffusion leading edge, this device includes
Carbon dioxide injection system, detecting system and liquid injection system；Described carbon dioxide injection system includes dioxide bottle；
Described detecting system include transparent detection pipe and for interface connect with exterior tubing, described interface include first interface with
Second interface；Described liquid injection system includes liquid container；Wherein, described gas cylinder connects with first interface, and described
One interface connects with one end of transparent detection pipe, the other end of described transparent detection pipe and the second orifice, and described second connects
Mouth connects with liquid container.
In the device of the studies above carbon dioxide diffusion leading edge, before gas injection, can first the detection solution containing Herba Cladoniae rangiferinae be noted
Enter in liquid container, the most again the detection liquid in liquid container is got in transparent detection pipe；Two are opened during gas injection
Carbonoxide steel cylinder carbon dioxide injection in transparent detection pipe (does not typically pass under liquid level, but can also be passed through liquid if desired
Test under face), along with carbon dioxide diffusion in detection solution, (carbon dioxide is met Herba Cladoniae rangiferinae solution and is become to produce metachromasia
Color), may indicate that the position of carbon dioxide diffusion leading edge.
After tested, the device of the research carbon dioxide diffusion leading edge that the present invention provides can reflect low concentration dioxy exactly
Change the existence of carbon, therefore there is the highest sensitivity, provide good equipment for the research in terms of carbon dioxide diffusion leading edge
Condition.With the device of the research carbon dioxide diffusion leading edge that the present invention provides, it is possible to measure under different condition, different diffusion coefficients
Corresponding diffusion leading edge translational speed.So, by the chromogenic reaction of indicator (Herba Cladoniae rangiferinae), can reach carbon dioxide is existed
The purpose that diffusion leading edge in salt aqueous phase, oil phase and hole is monitored and predicts.
In the device studying carbon dioxide diffusion leading edge that the present invention provides, those skilled in the art can be according to reality
Situation arranges corresponding valve on pipeline, repeats no more when describing assembly of the invention.
In the device of the studies above carbon dioxide diffusion leading edge, it is preferable that described carbon dioxide injection system also includes
Pressure buffer portion, described pressure buffer portion is located on the pipeline that gas cylinder connects with first interface, gas in steady pipeline
Fluctuation.It is further preferred that described pressure buffer portion includes at least one surge tank；Surge tank can be to rise in prior art
To the conventional equipment of gas pressure cushioning effect, it addition, connect into the device of research carbon dioxide diffusion leading edge for surge tank
In mode there is no particular/special requirement yet.Specifically, the surge tank used in the present invention can be the tank body that one end has through hole, institute
Stating through hole and be provided with the pipeline being in communication with the outside, described tank body is connected to gas cylinder by the pipeline of through hole and connects with first interface
Pipeline on.Now, the node formed when can gas cylinder, first interface and tank body be interconnected is designated as primary nodal point.This
The surge tank of bright middle use can also have the tank body of through hole for two ends, and described tank body is in a series arrangement or parallel way is connected to
On the pipeline that described gas cylinder connects with first interface.
In the device of the studies above carbon dioxide diffusion leading edge, it is preferable that described carbon dioxide injection system also includes
Pressure transducer, described pressure transducer is for detecting the gas pressure entering described detection components.One provided in the present invention
Plant in preferred implementation, pressure transducer is arranged at primary nodal point.
In the device of the studies above carbon dioxide diffusion leading edge, it is preferable that this device also includes pumped vacuum systems, described
Gas in pumped vacuum systems pipeline, transparent detection pipe and liquid container in withdrawing device.During specific experiment,
The pipeline in pumped vacuum systems withdrawing device and the air in transparent detection pipe can be first passed through, more individually to molten equipped with detection
The liquid container of liquid carries out evacuation (can preferably control to detect the dissolved gas in solution).For obtaining different solution gas
The detection solution of content, can be arranged as required to carry out liquid container the condition of evacuation.For pumped vacuum systems
It is connected into the mode of device, without particular/special requirement, can determine according to practical situation.
In a kind of preferred implementation that the present invention provides, described pumped vacuum systems includes vacuum pump；Described vacuum pump
It is located on the pipeline that the second interface connects with liquid container.Now, can be by the second interface, liquid container and vacuum
The node formed when pump is interconnected is designated as secondary nodal point；In a kind of preferred implementation that the present invention provides, evacuation system
Pressure vacuum gauge in system is also disposed at secondary nodal point.
In the device of the studies above carbon dioxide diffusion leading edge, it is preferable that described liquid container is that top is provided with
Through hole, bottom is the tank body that piston type injects parts；The bottom of described tank wall is provided with can inject piston type parts and carry out
Fixing fixture；Described liquid container is connected with fluid injection pipeline by top through hole.It addition, detection liquid can pass through
The through hole at tank body top injects, it is also possible to set up liquid hand-hole at tank body top.In order to meet the liquid equipped with detection liquid
Body stores the needs of container vacuum-pumping, can be provided for fixed piston formula in the bottom of tank wall and inject the fixing of parts
Part, such as, be screwed, snap close fixes or latch is fixing etc..
In the device of the studies above carbon dioxide diffusion leading edge, transparent detection pipe can be permissible according to the requirement of experimental pressure
Selecting different materials, quartz ampoule common for the experiment under low-pressure environment just can meet, optional gem under high-pressure situations
Level quartz glass tube.In order to use safety, rustless steel sleeve can be set up in the outside of transparent detection pipe, and at described rustless steel
The form along transparent detection length of tube direction is had on sleeve.In a kind of preferred implementation that the present invention provides, a kind of band
The parameter having the transparent detection of rustless steel sleeve to manage (as illustrated in figs. ia and ib) is: quartz pipe range 1m, external diameter 3cm, wall thickness
1.2cm, it is possible to the maximum pressure born is 8MPa；Sleeve material is 316L rustless steel, long 1m, internal diameter 3.1cm, wall thickness 0.5cm,
Pressure-bearing 10MPa, for the ease of observation, opens downwards regarding of two long 90cm arc length 1cm symmetrically at distance sleeve top 5cm
Window.
In the device of the studies above carbon dioxide diffusion leading edge, for the ease of calculating the propelling of carbon dioxide diffusion leading edge
Situation, can arrange graduation mark at the form of transparent detection pipe or rustless steel sleeve.
In the device of the studies above carbon dioxide diffusion leading edge, in order to meet the needs of pressurization carbon dioxide injection, respectively manage
Pressure stainless steel tubing preferably selected by line.
In the device of the studies above carbon dioxide diffusion leading edge, first interface and the second interface in detecting system are permissible
Select custom interface in this area.In a kind of preferred implementation that the present invention provides, described interface is stainless steel
Plug-in flange, is provided with at least one sealing rubber ring in the one end being used for filling in transparent detection pipe.
In a kind of preferred implementation that the present invention provides, six-way valve A is set at primary nodal point, makes described air injection pipe
Line, pressure transducer, first interface are connected by six-way valve A with pressure surge tank；And arrange at described secondary nodal point
Six-way valve B, makes described second interface, liquid container be connected by six-way valve B with vacuum pump.
For reaching above-mentioned purpose, present invention also offers a kind of side utilizing said apparatus research carbon dioxide diffusion leading edge
Method, the method comprises the following steps: utilizes the device of the studies above carbon dioxide diffusion leading edge to test, makes carbon dioxide exist
Test solution containing Herba Cladoniae rangiferinae is diffused, by observing the test solution color change feelings along carbon dioxide injection direction
Condition, it is thus achieved that the diffusion advance distance of leading edge, the data of carbon dioxide injection time；According to the data obtained, carbon dioxide is spread
Leading edge is studied.
Utilize the present invention provide research carbon dioxide diffusion leading edge device, can by monitoring carbon dioxide injection during not
The color change of agent indicated at co-located, and then qualitatively judge the existence of carbon dioxide, obtain spreading the propelling situation of leading edge.
In the method for the studies above carbon dioxide diffusion leading edge, general Herba Cladoniae rangiferinae is at the mass percent concentration of test solution
Sensitive display advancing front is got final product more than 0.01%；In a kind of preferred implementation that the present invention provides, detection solution
Basal liquid is the NaCl solution of 0.8mol/L, and Herba Cladoniae rangiferinae mass percent concentration in detection solution is 0.02%.
In the method for the studies above carbon dioxide diffusion leading edge, it is preferable that according to the data obtained, carbon dioxide is expanded
The concrete steps that scattered leading edge carries out studying include:
(1) pushing away of diffusion leading edge is set up according to the acquisition diffusion advance distance of leading edge, the data of carbon dioxide injection time
Enter distance and the relation curve of carbon dioxide injection time；
(2) carbon dioxide diffusion mould is set up according to one-dimensional and unsteady state equation, the initial condition of diffusion model and boundary condition
Type, by solving carbon dioxide diffusion model, it is thus achieved that in diffusion process gas concentration lwevel in time with the change of the liquid phase degree of depth
Change relational expression；
(3) gas concentration lwevel is obtained by pressure depletion experiments different with in the variation relation formula of the liquid phase degree of depth in time
The variant diffusion coefficient in moment.
In the method for the studies above carbon dioxide diffusion leading edge, it is preferable that the described one-dimensional and unsteady state side in step (2)
Journey is shown in formula I:
Initial condition and the boundary condition of diffusion model are as follows:
H=0, t0＜ t ＜ teq C(t,h)=CeqFormula (II-1),
0 ＜ h ＜ H, t=0 C(t,h)=0 formula (II-2),
In diffusion process, gas concentration lwevel variation relation formula with the liquid phase degree of depth in time is shown in formula III:
In above-mentioned formula I, formula (II-1), formula (II-2), formula (II-3) and formula III,
T diffusion time, s；
t0Initial time, s；
Distance between a certain position of h and liquid level, m；
H liquid phase height, m；
teqThe balance time used, s；
C(t,h)Carbon dioxide is at t, the concentration of h distance, mol/L；
CeqThe concentration of carbon dioxide, mol/L in liquid phase during balance；
D diffusion coefficient, m2/s。
Compared with prior art, the devices and methods therefor of the research carbon dioxide diffusion leading edge that the present invention provides has following
Advantage:
(1) realize on-line measurement, overcome the disturbance that experiment process is caused by sampling process, it is to avoid sampling, monitoring process
The result distortion that the escape of middle carbon dioxide causes.
(2) very rapid due to metachromasia, and then can quick obtaining experimental result.
(3) indicator used in the present invention is the sensitiveest, and Herba Cladoniae rangiferinae reaches during variable color lower limit the concentration of carbon dioxide in water
It is 2.326 × 10-4mol/L.Relative to the certainty of measurement of Raman spectrum, the precision of indicator has exceeded an order of magnitude.
Accompanying drawing explanation
Fig. 1 a is the structural representation of a kind of transparent detection pipe with rustless steel sleeve；
Fig. 1 b is the top view of Fig. 1 a rustless steel sleeve；
Fig. 2 is the structural representation of the device studying carbon dioxide diffusion leading edge in embodiment 1；
Fig. 3 is to spread frontal movement distance, time chart in embodiment 2；
Gas concentration lwevel scattergram when Fig. 4 is 398s in embodiment 2；
Gas concentration lwevel scattergram when Fig. 5 is 4122s in embodiment 2；
Fig. 6 is that in embodiment 2, pressure exhaustion method pressure changes over figure；
Fig. 7 is pressure exhaustion method injection rate the most in the same time in embodiment 2；
Drawing reference numeral illustrates: 1 computer, 2 pressure vacuum gauges, 3 vacuum pumps, 4 six-way valve A, 5 six-way valve B, 6 fluid storage are held
Device, 7 quartz ampoules, 8 dioxide bottles, 9 Pressure gauges, 10 pressure transducers, 11 six-way valve C, 12 pressure surge tanks, 13 Gem Grades
Quartz glass tube, 14 rustless steel sleeves, 15 forms.
Detailed description of the invention
In order to the technical characteristic of the present invention, purpose and beneficial effect are more clearly understood from, the existing skill to the present invention
Art scheme carries out described further below, but it is not intended that to the present invention can the restriction of practical range.
Embodiment 1
Present embodiments providing a kind of device studying carbon dioxide diffusion leading edge, this device is by carbon dioxide injection system
System, pressure buffer portion, detecting system, liquid injection system and pumped vacuum systems composition；
Described carbon dioxide injection system is made up of dioxide bottle 8 and pressure transducer 10；
Described pressure buffer portion is pressure surge tank 12, and this pressure surge tank is the tank body that one end has through hole, through hole
It is provided with the pipeline being in communication with the outside；
Described detecting system includes quartz ampoule 7 (long 1m, internal diameter 2.2cm, wall thickness 0.4cm), first interface and the second interface；
First interface is installed on the upper port of quartz ampoule, the second interface is installed on the lower port of quartz ampoule；First interface and the second interface
For the plug-in flange of stainless steel, it is provided with two sealing rubber rings in the one end being used for filling in transparent detection pipe；
Described liquid injection system includes liquid container 6, and this liquid container is that top is provided with through hole, and bottom is
Piston type injects the tank body of parts；Being screwed that piston type can be injected parts are fixed it is provided with in the bottom of tank wall
Part；
Described pumped vacuum systems is made up of vacuum pump 3 and pressure vacuum gauge 2；
It addition, this device also includes stainless steel tubing, computer 1, the air relief valve 9 of dioxide bottle, six-way valve etc.；Clematis stem
Valve is three, including (six-way valve A) 4, (six-way valve B) 5 and (six-way valve C) 11；
Wherein, dioxide bottle 8, first interface, pressure surge tank 12 and pressure transducer 10 are connected to six
(4 in 6 ports of six-way valve are selected) on logical valve C；The other end of pressure transducer 10 is connected with computer 1；Second interface and
Liquid container 6 is connected on six-way valve B (select 6 ports of six-way valve in 2), six-way valve B also with six-way valve C
Connecting, on six-way valve C, connection has vacuum pump 3 and pressure vacuum gauge 2.
The structure of the device of the research carbon dioxide diffusion leading edge in the present embodiment is as shown in Figure 2.
Embodiment 2
Present embodiments provide a kind of method studying carbon dioxide diffusion leading edge, the method use in embodiment 1
Device, concretely comprises the following steps:
(1) device using the research carbon dioxide diffusion leading edge in embodiment 1 carries out the diffusion experiment of carbon dioxide, with
Obtain the diffusion advance distance of leading edge, the data of carbon dioxide injection time；Step includes:
1. the detection solution (NaCl solution of 0.8mol/L, wherein containing 0.02% Herba Cladoniae rangiferinae) prepared is injected fluid storage
In container；
2., after opening and closing respective valves, open vacuum pump and device is carried out evacuation 4 hours to liquid container；
3. the detection solution in liquid container is injected in quartz ampoule；
4. the output pressure of dioxide bottle being set as 200KPa, (after gas injection starts, 30 seconds left to proceed by gas injection
Right color starts change, illustrates that this device reaction is sensitive, feasible)；
5., after gas injection 4500 seconds, experiment is terminated.
Injection length and the data of diffusion frontal movement distance in record experiment, and data creating is become curve, it is specifically shown in
Fig. 3.
(2) carbon dioxide diffusion mould is set up according to one-dimensional and unsteady state equation, the initial condition of diffusion model and boundary condition
Type, by solving carbon dioxide diffusion model, it is thus achieved that in diffusion process gas concentration lwevel in time with the change of the liquid phase degree of depth
Change relational expression；Particularly as follows:
One-dimensional and unsteady state diffusion equation is
Initial condition and the boundary condition of diffusion model are as follows:
H=0, t0＜ t ＜ teq C(t,h)=CeqFormula (II-1),
0 ＜ h ＜ H, t=0 C(t,h)=0 formula (II-2),
By diffusion model is solved, in available diffusion process concentration in time with the change of the liquid phase degree of depth:
In above-mentioned formula I, formula (II-1), formula (II-2), formula (II-3) and formula III,
T diffusion time, s；
t0Initial time, s；
Distance between a certain position of h and liquid level, m；
H liquid phase height, m；
teqThe balance time used, s；
C(t,h)Carbon dioxide is at t, the concentration of h distance, mol/L；
CeqThe concentration of carbon dioxide, mol/L in liquid phase during balance；
D diffusion coefficient, m2/s。
Spreading leading edge gas concentration lwevel in this experiment is 2.326 × 10-4Mol/L, interface gas concentration lwevel is assumed
Just reaching balance when experiment just starts, and no longer change, trying to achieve its value according to Henry's law is 0.0668mol/L.
(3) gas concentration lwevel is obtained by pressure depletion experiments different with in the variation relation formula of the liquid phase degree of depth in time
The variant diffusion coefficient in moment；Particularly as follows:
Along with the carrying out of diffusion, carbon dioxide dispersal behavior in the solution is continually changing, so the expansion in formula III
Scattered coefficient should use variant diffusion coefficient, uses the change diffusion the most corresponding that pressure depletion experiments calculates herein
Coefficient, concrete tables of data 1.
The variant diffusion coefficient the most in the same time that table 1 pressure exhaustion method is tried to achieve
| Time (s) | 398 | 613 | 1450 | 2827 | 4122 |
| Diffusion coefficient (m<sup>2</sup>/s) | 6.77E-8 | 6.87E-8 | 8.0E-8 | 1.0E-7 | 1.1E-7 |
According to experimental data, leading edge displacement the most in the same time can be obtained, utilize Matlab software to compile in conjunction with above formula
Journey, in available solution the most in the same time, gas concentration lwevel is with the scattergram of distance, and partial results is shown in Fig. 4 and Fig. 5.
Utilize Matlab software that curve is fitted and be integrated to spread edge, titanium dioxide the most in the same time can be obtained
The injection rate of carbon, the results are shown in Table 2.
Table 2 leading edge monitoring method carbon dioxide injection amount the most in the same time
| Time (s) | 398 | 613 | 1450 | 2827 | 4122 |
| Injection rate (mol) | 5.40E-4 | 7.07E-4 | 1.28E-3 | 2.13E-3 | 2.80E-3 |
In order to verify the reasonability of this device research carbon dioxide dispersal behavior, by this result and pressure depletion experiments result
Contrast.
Pressure depletion experiments condition: in the calorstat that temperature is 25 DEG C, injects in the intermediate receptacle of 100ml
50ml0.8mol/L NaCl solution (liquid level height 5.4cm), extracts out upper air vacuum pump, and reinjecting pressure is 200KPa
Carbon dioxide, now cut off source of the gas, intrinsic pressure by intermediate receptacle in pressure transducer record carbon dioxide diffusion process
The change of power.
Time dependent for pressure data are processed, take the time interval identical with spreading leading edge visualized experiment,
Pressure data is depicted as curve such as Fig. 6.
For the PVT container of whole closing, from material balance principle, the CO reduced in gas phase2Amount and liquid phase increase
The CO added2Measure equal.By the state equation of gas, actual gas can be calculated from original state (P0, t0) to certain for the moment
Carve (Pt, ti) CO that reduced in gas phase2Amount Δ nt。
N in formula0、ntFor initial time and be diffused into CO in t gas phase2Amount；R is gas constant, Z0、ZtFor actual gas
Compressibility factor.In this process, the calculating of the compressibility factor of gas is to be obtained by critical blank holder force method, due to diffusion
During, from initial time to poised state, the change of pressure causes Gas Compression Factor change little, the compression in equation
The factorTake the meansigma methods of original state and poised state.
Formula (5) is utilized to obtain the amount of material of the carbon dioxide being diffused into the most in the same time in liquid phase, such as Fig. 7.
Difference in view of pressure depletion experiments and leading edge monitoring experimental liquid height causes the difference of injection rate, by result
Being normalized, obtain relative injection rate the most in the same time, comparing result is shown in Table 3.
Table 3 pressure exhaustion method contrasts table with leading edge monitoring method relative to injection rate
From table 3 it is observed that the relative injection rate that pressure exhaustion is monitored with leading edge is closely, it was demonstrated that this device energy
The frontal movement situation of enough carbon dioxide diffusions of monitoring accurately.
Claims (10)
1. studying a device for carbon dioxide diffusion leading edge, this device includes carbon dioxide injection system, detecting system and liquid
Body injected system；
Described carbon dioxide injection system includes dioxide bottle；
Described detecting system includes transparent detection pipe and for the interface connected with exterior tubing, and described interface includes that first connects
Mouth and the second interface；
Described liquid injection system includes liquid container；
Wherein, described gas cylinder connects with first interface, and described first interface connects with one end of transparent detection pipe, described transparent inspection
The other end of test tube and the second orifice, described second interface connects with liquid container.
The device of research carbon dioxide the most according to claim 1 diffusion leading edge, wherein, described carbon dioxide injection system
Also including pressure buffer portion, described pressure buffer portion is located on the pipeline that gas cylinder connects with first interface, in steady pipeline
The fluctuation of gas.
Research carbon dioxide the most according to claim 1 diffusion leading edge device, wherein, described pressure buffer portion include to
A few surge tank；
Described surge tank is the tank body that one end has through hole, and described through hole is provided with the pipeline being in communication with the outside, and described tank body leads to
The pipeline crossing through hole is connected on the pipeline that gas cylinder connects with first interface；Or,
Described surge tank is the tank body that two ends have through hole, and described tank body is in a series arrangement or parallel way is connected to described gas cylinder
On the pipeline connected with first interface.
The device of research carbon dioxide the most according to claim 1 diffusion leading edge, wherein, this device also includes evacuation system
System, the gas in described pumped vacuum systems pipeline, transparent detection pipe and liquid container in withdrawing device.
The device of research carbon dioxide the most according to claim 4 diffusion leading edge, wherein, described pumped vacuum systems includes very
Empty pump；Described vacuum pump is located on the pipeline that the second interface connects with liquid container.
The device of research carbon dioxide the most according to claim 1 diffusion leading edge, wherein, described liquid container is top
Portion is provided with through hole, and bottom is the tank body that piston type injects parts；The bottom of described tank wall is provided with can inject portion by piston type
The fixture that part is fixed；
Described liquid container is connected with fluid injection pipeline by top through hole.
The device of research carbon dioxide the most according to claim 1 diffusion leading edge, wherein, the outside of described transparent detection pipe
It is provided with rustless steel sleeve, described rustless steel sleeve has the form along transparent detection length of tube direction.
8. utilize the method that the device research carbon dioxide described in any one of claim 1-7 spreads leading edge, the method bag
Include following steps:
The device utilizing described research carbon dioxide diffusion leading edge is tested, and makes carbon dioxide at the test solution containing Herba Cladoniae rangiferinae
In be diffused, by observing test solution along the color situation of change in carbon dioxide injection direction, it is thus achieved that pushing away of diffusion leading edge
Enter distance, the data of carbon dioxide injection time；According to the data obtained, carbon dioxide diffusion leading edge is studied.
The method of research carbon dioxide the most according to claim 8 diffusion leading edge, wherein, according to the data obtained to dioxy
The concrete steps that change carbon diffusion leading edge carries out studying include:
(1) according to obtaining the diffusion advance distance of leading edge, the advancing distance of the data of carbon dioxide injection time foundation diffusion leading edge
From the relation curve with the carbon dioxide injection time；
(2) carbon dioxide diffusion model is set up according to one-dimensional and unsteady state equation, the initial condition of diffusion model and boundary condition, logical
Cross and carbon dioxide diffusion model solved, it is thus achieved that in diffusion process gas concentration lwevel in time with the variation relation of the liquid phase degree of depth
Formula；
(3) by pressure depletion experiments obtain gas concentration lwevel in time with the variation relation formula of the liquid phase degree of depth in the most in the same time
Variant diffusion coefficient.
The method of research carbon dioxide the most according to claim 9 diffusion leading edge, wherein, described one-dimensional in step (2)
Unsteady equation is shown in formula I:
Initial condition and the boundary condition of diffusion model are as follows:
H=0, t0<t<teq C(t,h)=CeqFormula (II-1),
0 < h < H, t=0 C (t,h)=0 formula (II-2),
In diffusion process, gas concentration lwevel variation relation formula with the liquid phase degree of depth in time is shown in formula III:
In above-mentioned formula I, formula (II-1), formula (II-2), formula (II-3) and formula III,
T diffusion time, s；
t0Initial time, s；
Distance between a certain position of h and liquid level, m；
H liquid phase height, m；
teqThe balance time used, s；
C(t,h)Carbon dioxide is at t, the concentration of h distance, mol/L；
CeqThe concentration of carbon dioxide, mol/L in liquid phase during balance；
D diffusion coefficient, m2/s。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610647251.8A CN106092830A (en) | 2016-08-09 | 2016-08-09 | A kind of devices and methods therefor studying carbon dioxide diffusion leading edge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610647251.8A CN106092830A (en) | 2016-08-09 | 2016-08-09 | A kind of devices and methods therefor studying carbon dioxide diffusion leading edge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106092830A true CN106092830A (en) | 2016-11-09 |
Family
ID=57455984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610647251.8A Pending CN106092830A (en) | 2016-08-09 | 2016-08-09 | A kind of devices and methods therefor studying carbon dioxide diffusion leading edge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106092830A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108106970A (en) * | 2017-12-15 | 2018-06-01 | 中国石油大学(北京) | Visual heat resisting and pressure resisting device, gas-liquid interface mass transfer dissolving measuring device and method |
| CN111305801A (en) * | 2020-03-09 | 2020-06-19 | 中国石油化工股份有限公司 | Carbon dioxide flooding front edge description method |
| CN113075093A (en) * | 2021-03-29 | 2021-07-06 | 青岛科技大学 | Gas-phase component mutual diffusion coefficient measuring device under non-normal pressure condition at very high temperature |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101490556A (en) * | 2006-07-11 | 2009-07-22 | 保罗·奈杰尔·布罗克韦尔 | Indicator system for determining analyte concentration |
| CN103544361A (en) * | 2013-11-04 | 2014-01-29 | 西北大学 | Evaluation method of CO2 geological sequestration potential in oil-gas field development |
-
2016
- 2016-08-09 CN CN201610647251.8A patent/CN106092830A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101490556A (en) * | 2006-07-11 | 2009-07-22 | 保罗·奈杰尔·布罗克韦尔 | Indicator system for determining analyte concentration |
| CN103544361A (en) * | 2013-11-04 | 2014-01-29 | 西北大学 | Evaluation method of CO2 geological sequestration potential in oil-gas field development |
Non-Patent Citations (3)
| Title |
|---|
| 刘爱贤: "二氧化碳在水中扩散系数的实验测定和计算", 《石油化工高等学校学报》 * |
| 杨多兴: "纳米流体注入过程中咸水层二氧化碳迁移数值分析", 《地球物理学进展》 * |
| 赵仁保等: "二氧化碳气体的流动及反应特性研究:从微管到多孔介质", 《科学通报》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108106970A (en) * | 2017-12-15 | 2018-06-01 | 中国石油大学(北京) | Visual heat resisting and pressure resisting device, gas-liquid interface mass transfer dissolving measuring device and method |
| CN108106970B (en) * | 2017-12-15 | 2019-09-24 | 中国石油大学(北京) | Visual heat resisting and pressure resisting device, gas-liquid interface mass transfer dissolution measuring device and method |
| CN111305801A (en) * | 2020-03-09 | 2020-06-19 | 中国石油化工股份有限公司 | Carbon dioxide flooding front edge description method |
| CN111305801B (en) * | 2020-03-09 | 2021-12-14 | 中国石油化工股份有限公司 | Carbon dioxide flooding front edge description method |
| CN113075093A (en) * | 2021-03-29 | 2021-07-06 | 青岛科技大学 | Gas-phase component mutual diffusion coefficient measuring device under non-normal pressure condition at very high temperature |
| CN113075093B (en) * | 2021-03-29 | 2022-09-23 | 青岛科技大学 | Measuring method of gas-phase component mutual diffusion coefficient measuring device under very-temperature non-normal-pressure condition |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110296921B (en) | Testing device and testing method for shale gas permeability under reservoir conditions in steady state method | |
| CN202814960U (en) | Physical simulation experimental device for water invasion performance of fissured gas reservoir with bottom water | |
| CN104897543A (en) | Multi-phase permeameter and rock permeability determination method | |
| CN102830214B (en) | Dynamic physical simulation experiment method for water invasion of fractured gas reservoir with bottom water and device thereof | |
| CN112730196B (en) | High-temperature high-pressure microscopic visual flowing device and experimental method | |
| CN104374683A (en) | Device and method for testing core pore compressibility | |
| CN103245597B (en) | Hypotonic rock transient state pneumatic pressure pulses permeability survey method | |
| CN108119132B (en) | Tight sandstone gas reservoir near-wellbore-zone radial seepage water saturation simulation device and method | |
| CN110346261B (en) | Self-balancing type coal rock triaxial loading seepage and displacement test instrument and method | |
| CN106092830A (en) | A kind of devices and methods therefor studying carbon dioxide diffusion leading edge | |
| CN112858628A (en) | Microcosmic visual experiment device for simulating fluid displacement under high-temperature and high-pressure conditions | |
| CN104297126A (en) | Device and method applied to measurement of low-permeability reservoir gas seepage start-up pressure gradient | |
| CN105784054A (en) | System and method suitable for calibrating volume of gas cavity in irregular shape | |
| CN109239310A (en) | A kind of seepage force size and its measuring device and method that stratum effective stress is influenced | |
| CN108871876B (en) | Gas production column for monitoring carbon dioxide flux of soil in gas-filled zone of gas injection oil displacement well site | |
| CN203249841U (en) | Hypotonic rock transient air pressure pulse permeability measuring device | |
| CN104007041A (en) | Device for determining content of hydrogen sulfide in coal bed | |
| JP6604625B2 (en) | Flow measuring device | |
| CN204964496U (en) | Water conservancy measure is to physical simulation test device of coal body gas seepage flow characteristic influence | |
| CN212410387U (en) | Imbibition experimental device for simulating formation pressure condition | |
| CN202196054U (en) | Imbibition instrument | |
| Zhu et al. | An experimental apparatus for supercritical CO2 fracturing of shale: system design and application tests | |
| CN213478283U (en) | Underground oil pipe leakage simulation system | |
| CN109655391B (en) | Rock-soil body material gas breakthrough/permeability characteristic double-module control test system | |
| CN209990484U (en) | Giant magnetostrictive forced vibration permeability increasing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161109 |