CN209247767U - A kind of simulation CO2The experimental provision of water rock chemical reaction - Google Patents
A kind of simulation CO2The experimental provision of water rock chemical reaction Download PDFInfo
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- CN209247767U CN209247767U CN201822089924.XU CN201822089924U CN209247767U CN 209247767 U CN209247767 U CN 209247767U CN 201822089924 U CN201822089924 U CN 201822089924U CN 209247767 U CN209247767 U CN 209247767U
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Abstract
A kind of simulation CO provided by the utility model2The experimental provision of water rock chemical reaction, including reactor tank and insulating box, wherein reactor tank is placed in insulating box；Lower half is filled with water flooding in the inner cavity of reactor tank, and the upper half is filled with supercritical CO2, bottom is placed with rock sample, and the rock sample is coated in water flooding；The structure is simple, overcomes existing simulator existing security hidden trouble when dismantling sampling.
Description
Technical field
The utility model belongs to coal field, and in particular to a kind of simulation CO2The experimental provision of water rock chemical reaction.
Background technique
CO2After fracturing fluid injects stratum, after being dissolved into water flooding formation carbonic acid, interact with reservoir rock, Ke Yirong
The unstable mineral (such as calcite, dolomite) in reservoir rock is lost, thus to rock property (such as mineral composition, hole knot
Structure, hole blend mechanical property etc.) it has an impact, and the variation of rock property will affect fracturing effect, and then influence oil/gas well
Yield.Thus, study CO2Water-rock acts on the influence to rock property, for studying CO2Fracturing yield increasing mechanism has important meaning
Justice.To simulate CO2Fracturing fluid inject stratum after with reservoir rock interaction process, it is necessary to a kind of simulation CO of utility model2-
Water-rock effect experimental provision and method.
Existing device is real to limit the sliding of sealing cover in the axial direction generally by the fastening lid being threadedly coupled with autoclave body
Now seal.When disassembly, sealing cover need to be taken out by pressurizeing into cavity；Pressure medium is injected instead by high pressure hand-operated metering pump
It answers in the pressurizing chamber of kettle, pressure medium pushes piston by CO2Pressurization.For this kind of device in disassembly, caping will be sealed by existing to build the pressure
Security risk out；The seal member of reaction kettle inner piston is easy by high temperature and pressure CO2Corrosion and damage loses sealing performance；And
Rock sample damage experiment process is not illustrated.Therefore, a kind of safe and efficient simulation CO of utility model2Water-rock effect reality
Experiment device and method are this field technical problems urgently to be resolved.
Summary of the invention
The purpose of this utility model is to provide a kind of simulation CO2The experimental provision of water rock chemical reaction solves existing
Some simulation CO2There is security risk in disassembly in water-rock effect experimental provision.
In order to achieve the above object, the technical solution adopted in the utility model is:
A kind of simulation CO provided by the utility model2The experimental provision of water rock chemical reaction, including reactor tank and constant temperature
Case, wherein reactor tank is placed in insulating box；Lower half is filled with water flooding in the inner cavity of reactor tank, and the upper half is filled with
Supercritical CO2, bottom is placed with rock sample, and the rock sample is coated in water flooding.
Preferably, supercritical CO is provided in reactor tank2Injection hole, supercritical CO2Injection hole is connected with supercritical CO2Hair
Generating apparatus.
Preferably, supercritical CO2Generating device includes CO2Piston container, cold bath and CO2Steel cylinder, wherein reactor tank
Supercritical CO2Injection hole connects CO2The liquid CO of piston container2Outlet, CO2The liquid CO of piston container2Entrance connects low temperature
The CO of bath2Gas vent, the CO of cold bath2Gas feed connects CO2The outlet of steel cylinder.
Preferably, CO2Piston container connects cold bath by second pipe, and the second temperature is provided on the second pipe
Spend sensor, second pressure sensor and the second valve；Wherein, the 2nd 1 temperature sensor is connected with second temperature table；Second
Pressure sensor is connected with second pressure gauge.
Preferably, reactor tank and CO2It is connected between piston container by first pipe, is provided in the described first pipe
First temperature sensor, first pressure sensor and the first valve；Wherein, the first temperature sensor is connected with the first thermometer；
First pressure sensor is connected with first pressure gauge.
Preferably, lid is installed, the lid is step axle construction, and small end is loaded on the open end in reactor tank
The open end of reactor tank.
Preferably, the open end of reactor tank is provided with outer, and the big end of the outer and lid is fastenedly connected.
Preferably, annular groove is offered on the small end of lid, and fluorine-containing rubber circle is installed in the annular groove.
Compared with prior art, the utility model has the beneficial effects that
A kind of simulation CO provided by the utility model2The experimental provision of water rock chemical reaction, using insulating box to injection
There are the reactor tank of water flooding, rock sample to be heated, then to being injected with liquid CO2CO2Piston container is heated, so that CO2Shape
At supercritical CO2, by supercritical CO2It is injected into reactor tank, it can be to CO2Fracturing fluid injects the phase behind stratum with reservoir rock
Interaction is simulated；Meanwhile environment needed for simulation is controlled by insulating box, which has fully considered CO2Pressure
Split CO in work progress2The interaction process of fracturing fluid and reservoir rock；And when dismantling sampling, carbon dioxide is released, instead
It answers tank to cool down, takes out rock sample；The structure is simple, overcomes existing simulator existing security risk when dismantling sampling and asks
Topic.
Detailed description of the invention
Fig. 1 is the experimental provision structural schematic diagram of the utility model；
Fig. 2 is installation diagram between reactor tank and lid；
Fig. 3 is the top view of lid；
Wherein, 1, reactor tank 2, water flooding 3, rock sample 4, supercritical CO25a, the first valve 6a, the first temperature sensing
Device 7a, first pressure sensor 5b, the second valve 6b, second temperature sensor 7b, second pressure sensor 5c, third
Valve 6c, third temperature sensor 5d, the 4th valve 5e, the 5th valve 8, CO2Piston container 9, distilled water 10, low temperature
Bath 11, CO2Steel cylinder 12, constant speed and constant pressure pump 13, insulating box 14, the first threaded hole 15, lid 16, fluorine-containing rubber circle
17, water flooding injection hole 18, liquid CO2Injection hole 19, the second threaded hole.
Specific embodiment
With reference to the accompanying drawing, the utility model is further described.
As shown in Figure 1 to Figure 3, a kind of simulation CO provided by the utility model2The experimental provision of water rock chemical reaction is used
In to CO2It is simulated behind fracturing fluid injection stratum with the interaction of reservoir rock.
Including reactor tank 1, water flooding 2, rock sample 3, CO2Liquid 4, the first valve 5a, the first temperature sensor 6a, the first pressure
Force snesor 7a, the second valve 5b, second temperature sensor 6b, second pressure sensor 7b, third valve 5c, third temperature pass
Sensor 6c, the 4th valve 6d, the 5th valve 6e, CO2Piston container 8, distilled water 9, cold bath 10, CO2Steel cylinder 11, constant speed are permanent
Press pump 12, insulating box 13, the first threaded hole 14, lid 15, fluorine-containing rubber circle 16, water flooding injection hole 17, CO2Liquid injection hole
18 and second threaded hole 19, wherein
Reactor tank 1 and CO2Piston container 8 is both placed in insulating box 13, wherein reactor tank 1 and CO2Between piston container 8
It is connected by first pipe, the first temperature sensor 6a, first pressure sensor 7a and is provided in the described first pipe
One valve 5a；
CO2Piston container 8 connects cold bath 10 by second pipe, and second temperature biography is provided on the second pipe
Sensor 6b, second pressure sensor 7b and the second valve 5b；
Cold bath 10 connects CO by third pipeline2Steel cylinder 11 is provided with third valve 5c on the third pipeline.
CO2The bottom of piston container 8 is connected with constant speed and constant pressure pump 12 by the 4th pipeline, is provided on the 4th pipeline
4th valve 5d.
Water flooding 2 is injected in reactor tank 1, the rock sample 3 is placed on the bottom of reactor tank 1, and seals up for safekeeping in water flooding 2
It is interior；The upper half of reactor tank 1 is injected with CO2Liquid 4.
Third temperature sensor and the 5th valve 5e are provided on the water flooding flow in pipes of reactor tank 1.
CO2The lower half of piston container 8 is injected with distilled water 9, and the upper half is injected with CO2Liquid 4.
Open end in reactor tank 1 is provided with outer 101, offers several along its circumferential direction on the outer 101
First threaded hole 14.
Lid 15 is installed, the lid 15 is step axle construction, and small end is loaded on instead on the open end in reactor tank 1
Answer the open end of tank 1；Offered in its big end along its circumferential direction offer it is equal with the first threaded hole number and communicate
Two threaded holes 19.
Annular groove is offered on the small end of lid 15, and fluorine-containing rubber circle 16 is installed in the annular groove.
Water flooding injection hole 17 and CO are offered on the lid 152Liquid injection hole 18.
Reactor tank 1 is Hastelloy material, has very strong acid resistance；Cold bath 10 can be by CO2It is changed into liquid；
Insulating box 13 is used for simulated formation temperature；Constant speed and constant pressure pump 12 is for CO2Pressurization, and CO in real-time tracking reactor tank 12Pressure,
To maintain pressure in reactor tank 1 constant, thus simulated formation pressure；CO2Piston container 8 is for CO needed for preserving experiment2；CO2Steel
Bottle 11 tests required CO for providing2。
The maximum working pressure of reactor tank 1 is 70MPa.
1 size of reactor tank can according to need flexible design, and general recommended size intracavity diameter is 5cm, depth 8cm,
Volume is 157cm3。
10 minimum operating temperature of cold bath is subzero 10 DEG C, can be by CO2It is completely transformed into liquid.
13 maximum temperature of insulating box is greater than 200 DEG C, is used for simulated formation temperature.
It is 70MPa that constant speed and constant pressure, which pumps 12 maximum working pressure (MWP)s,.
First temperature sensor 6a, second temperature sensor 6b and third temperature sensor be separately connected the first thermometer,
Second temperature table and third thermometer.
First pressure sensor 7a and second pressure sensor 7b are separately connected first pressure gauge and second pressure gauge.
The course of work:
A, a certain amount of water flooding 2 is fitted into reactor tank 1, and reactor tank 1 and rock sample 3 is put into the constant temperature for setting temperature
Certain time, the Standard rock sample that rock sample is generally diameter 25mm, length is 50mm are heated in case 13, rock sample size can flexibly be set
Meter；
B, start cold bath 10,10 cryogenic temperature of cold bath is set as 0 DEG C or 0 DEG C hereinafter, general about 30min
Afterwards, third valve 5c is opened, by CO2From CO2Steel cylinder 11 imports cold bath 10, CO after about 0.5 hour2For liquid；It opens at this time
Second valve 5b, by liquid CO2It send to CO2In piston container 8.
C, by CO2Piston container 8 is put into insulating box 13, sets the temperature of insulating box 13, will fill CO2Piston hold
Device 8 heats certain time, makes CO2As above-critical state；
D, rock sample 3 is placed in reactor tank 1, lid small end is assembled to the opening of reactor tank 1, it is then that screw 19 is right
Quasi- threaded hole 14, and screw 19 is tightened, finally reactor tank 1 is placed in insulating box 13；
E, the first valve 5a is opened, by the CO after heating2Import reactor tank 1, at this point, use constant speed and constant pressure pump 12 with
The discharge capacity constant speed of 100mL/min is to CO2Piston lower vessel portion pressurizing chamber injects distilled water 9, until pressure is in reactor tank 1
Until 20MPa；
F, constant speed and constant pressure pumps pressure in 12 real-time tracking reactor tanks 1, and pressure in reactor tank 1 is made to maintain 20MPa, CO2Water
Solution impregnates rock sample after a certain period of time, and reactor tank 1 is taken out from insulating box 13, releases the CO in reactor tank 12；
G, rock sample 3 is taken out, and measures the fluid sample of certain volume, other subsequent tests is done, generally comprises rock after immersion
The chemical composition etc. of fluid sample after the Basic Physical Properties and mechanical property of sample, and test immersion.
The above various embodiments is only to illustrate the technical solution of the utility model, rather than its limitations；Although referring to aforementioned
The utility model is described in detail in embodiment, those skilled in the art should understand that: it still can be right
Technical solution documented by previous embodiment is modified, or is equally replaced to some or all of the technical features
It changes；And these are modified or replaceed, the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution
Range.
Claims (8)
1. a kind of simulation CO2The experimental provision of water rock chemical reaction, which is characterized in that including reactor tank (1) and insulating box
(13), wherein reactor tank (1) is placed in insulating box (13)；Lower half is filled with water flooding (2) in the inner cavity of reactor tank (1),
Its upper half is filled with supercritical CO2(4), bottom is placed with rock sample (3), and the rock sample (3) is coated in water flooding (2).
2. a kind of simulation CO according to claim 12The experimental provision of water rock chemical reaction, which is characterized in that reactor tank
(1) supercritical CO is provided on2Injection hole, supercritical CO2Injection hole is connected with supercritical CO2Generating device.
3. a kind of simulation CO according to claim 22The experimental provision of water rock chemical reaction, which is characterized in that overcritical
CO2Generating device includes CO2Piston container (8), cold bath (10) and CO2Steel cylinder (11), wherein reactor tank (1) it is overcritical
CO2Injection hole connects CO2The liquid CO of piston container (8)2Outlet, CO2The liquid CO of piston container (8)2Entrance connects low temperature bath
The CO of slot (10)2Gas vent, the CO of cold bath (10)2Gas feed connects CO2The outlet of steel cylinder (11).
4. a kind of simulation CO according to claim 32The experimental provision of water rock chemical reaction, which is characterized in that CO2It is living
It fills in container (8) and cold bath (10) is connected by second pipe, be provided with second temperature sensor, second on the second pipe
Pressure sensor and the second valve；Wherein, the 2nd 1 temperature sensor is connected with second temperature table；The connection of second pressure sensor
There is second pressure gauge.
5. a kind of simulation CO according to claim 32The experimental provision of water rock chemical reaction, which is characterized in that reactor tank
(1) and CO2It is connected between piston container (8) by first pipe, is provided with the first temperature sensor in the described first pipe
(6a), first pressure sensor (7a) and the first valve (5a)；Wherein, the first temperature sensor (6a) is connected with the first temperature
Table；First pressure sensor (7a) is connected with first pressure gauge.
6. a kind of simulation CO according to claim 12The experimental provision of water rock chemical reaction, which is characterized in that reactor tank
(1) it is equipped on the open end on lid (15), the lid (15) is step axle construction, and small end is loaded on reactor tank (1)
Open end.
7. a kind of simulation CO according to claim 62The experimental provision of water rock chemical reaction, which is characterized in that reactor tank
(1) open end is provided with outer (101), and the outer (101) and the big end of lid (15) are fastenedly connected.
8. a kind of simulation CO according to claim 62The experimental provision of water rock chemical reaction, which is characterized in that lid
(15) annular groove is offered on small end, and fluorine-containing rubber circle (16) are installed in the annular groove.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822089924.XU CN209247767U (en) | 2018-12-12 | 2018-12-12 | A kind of simulation CO2The experimental provision of water rock chemical reaction |
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|---|---|---|---|
| CN201822089924.XU CN209247767U (en) | 2018-12-12 | 2018-12-12 | A kind of simulation CO2The experimental provision of water rock chemical reaction |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110879271A (en) * | 2019-12-13 | 2020-03-13 | 大连理工大学 | CO under simulated formation condition2Experimental device and method for water-rock reaction |
| CN112730023A (en) * | 2019-10-14 | 2021-04-30 | 中国石油化工股份有限公司 | Experimental device and method for researching long-term soaking-corrosion effects of shale and supercritical carbon dioxide |
-
2018
- 2018-12-12 CN CN201822089924.XU patent/CN209247767U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112730023A (en) * | 2019-10-14 | 2021-04-30 | 中国石油化工股份有限公司 | Experimental device and method for researching long-term soaking-corrosion effects of shale and supercritical carbon dioxide |
| CN110879271A (en) * | 2019-12-13 | 2020-03-13 | 大连理工大学 | CO under simulated formation condition2Experimental device and method for water-rock reaction |
| CN110879271B (en) * | 2019-12-13 | 2021-08-20 | 大连理工大学 | CO under simulated formation condition2Experimental device and method for water-rock reaction |
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