CN105804738B - A kind of mud shale wellbore stability and integrality Visual evaluation device - Google Patents
A kind of mud shale wellbore stability and integrality Visual evaluation device Download PDFInfo
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- CN105804738B CN105804738B CN201610146026.6A CN201610146026A CN105804738B CN 105804738 B CN105804738 B CN 105804738B CN 201610146026 A CN201610146026 A CN 201610146026A CN 105804738 B CN105804738 B CN 105804738B
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- 238000011156 evaluation Methods 0.000 title claims abstract description 17
- 230000000007 visual effect Effects 0.000 title claims abstract description 16
- 239000012530 fluid Substances 0.000 claims abstract description 168
- 239000011435 rock Substances 0.000 claims abstract description 61
- 238000006243 chemical reaction Methods 0.000 claims abstract description 33
- 239000004615 ingredient Substances 0.000 claims abstract description 15
- 238000013170 computed tomography imaging Methods 0.000 claims abstract description 11
- 238000005553 drilling Methods 0.000 claims description 30
- 238000002474 experimental method Methods 0.000 claims description 28
- 230000033228 biological regulation Effects 0.000 claims description 11
- 230000008859 change Effects 0.000 claims description 11
- 238000004088 simulation Methods 0.000 claims description 7
- 239000012224 working solution Substances 0.000 claims description 7
- 238000012800 visualization Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 238000011160 research Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000008901 benefit Effects 0.000 claims description 3
- 238000009472 formulation Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 6
- 238000002591 computed tomography Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 235000015076 Shorea robusta Nutrition 0.000 description 1
- 244000166071 Shorea robusta Species 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011846 endoscopic investigation Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 150000002466 imines Chemical class 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
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- 238000009991 scouring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
- E21B49/087—Well testing, e.g. testing for reservoir productivity or formation parameters
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The present invention relates to a kind of mud shale wellbore stability and integrality Visual evaluation devices, it includes rock core reaction kettle body, filter plate, seal rubber cylinder, CT Scanner, computer, the filter plate for compressing rock core both ends and axis pressure piston is respectively set in upper port, the lower port of rock core reaction kettle body, a plunger is arranged in the center of each axis pressure piston, each plunger is connect with axis pressure controller, a zoom endoscope is additionally provided at each filter plate, confining pressure chamber connects confining pressure hydraulic pump by high pressure line；The outside for being close to rock core reaction kettle body is equipped with temperature sensor and strain gauge；The outside of seal rubber cylinder is provided with CT Scanner, and CT Scanner connects CT imaging processor, and upper fluid outlet, lower fluid outlet are connected to fluid ingredient analytical instrument；Fluid ingredient analytical instrument, CT imaging processor, strain testing instrument, temperature sensor, axis pressure controller, endoscope signal recorder are connect with computer.The present invention can simulate underground high temperature and high pressure environment and fluid flow conditions, more meet underground actual conditions.
Description
Technical field
The present invention relates to the experimental evaluation equipment of wellbore stability in oil drilling process, and in particular to a kind of mud shale borehole wall
Stable and integrality Visual evaluation device.
Background technique
Borehole well instability and wellbore integrity missing problem are problems generally existing in oil drilling and oil recovery process, especially
Be caused down hole problem and induction other down-hole accidents it is very harmful to petroleum drilling and mining.Borehole well instability be by it is a variety of because
Caused by element, such as the physical reaction between property of drilling fluid, the ingredient for constituting formation rock, the borehole wall and fluid, therefore studying
Pure mechanics or Chemical Problem are no longer merely regarded as when borehole well instability, it need to be from the angle analysis of coupling, so as to more realistically
Evaluate borehole well instability problem.
Wellbore Stability in drilling process, wellbore integrity problem when recovering the oil have extremely strong timeliness, this is just
It is required to be monitored in real time, accomplishes to predict in advance, find, handle as early as possible early.Therefore well can be simulated by developing one kind
The Lab-evaluation instrument that borehole fluid influences borehole well instability and integrality under lower high temperature and pressure and flox condition becomes especially to weigh
It wants.
Summary of the invention
The object of the present invention is to provide a kind of mud shale wellbore stability and integrality Visual evaluation device, this mud shales
Wellbore stability and integrality Visual evaluation device in the prior art ask borehole well instability evaluation shortage authenticity for solving
Topic.
The technical solution adopted by the present invention to solve the technical problems is: this mud shale wellbore stability and integrality are visual
Changing evaluating apparatus includes rock core reaction kettle body, filter plate, seal rubber cylinder, CT Scanner, computer, rock core reaction kettle body it is upper
The filter plate for compressing rock core both ends is respectively set in port, lower port, and sealing rock core reaction kettle body is respectively mounted at each filter plate
Axis presses piston, and a plunger is arranged in the center of each axis pressure piston, and each plunger is connect with axis pressure controller, each filter plate
Place is additionally provided with a zoom endoscope, and each zoom endoscope is connect with endoscope signal recorder；Rock core reaction kettle body
It occupy in seal rubber cylinder, the annular chamber between rock core reaction kettle body and seal rubber cylinder is confining pressure chamber, and confining pressure chamber passes through high pressure
Pipeline connects confining pressure hydraulic pump；The outside for being close to rock core reaction kettle body is equipped with temperature sensor and strain gauge；Seal rubber
The outside of cylinder is provided with CT Scanner, and CT Scanner connects CT imaging processor；The filter plate of rock core reaction kettle body upper end with it is upper
Fluid inlet is connected to upper fluid outlet, and the filter plate of rock core reaction kettle body lower end and lower fluid inlet and lower fluid outlet connect
Logical, upper fluid outlet, lower fluid outlet are connected to outflow fluid collecting pit and fluid ingredient analytical instrument；Fluid ingredient analytical
Instrument, CT imaging processor, strain testing instrument, temperature sensor, axis pressure controller, endoscope signal recorder connect with computer
It connects, transmits data-signal to computer.
In above scheme upper fluid entrance by be provided with upper fluid inlet gate valve pipeline and fluid temperature regulation device and
Electric hydraulic pump connection, lower fluid inlet is by being provided with the pipeline of lower fluid inlet gate valve and fluid temperature regulation device and electronic
Hydraulic pump connection, electric hydraulic pump are connected by being provided with the pipeline of fluid valve with outflow fluid collecting pit.
Filter plate is circular steel plate in above scheme, and for thickness in 8 mm or so, it is 1 mm's that multiple diameters are distributed with thereon
Aperture, it is more far from the center point distribution, it is distributed close to the center point less；The center point is provided with the circular hole that diameter is 1 cm.
The invention has the following advantages:
The present invention uses zoom endoscopic technique and computed tomography (CT), by Computerized analysis system,
Rock core sample can be tested and carry out real-time visual, real-time interception layer cross section analyzed, and precision is high；The present invention can be with
Underground high temperature and high pressure environment and fluid flow conditions are simulated, underground actual conditions are more met.By recording and analyzing drilling fluid pair
It is influenced caused by borehole well instability, experimental result can satisfy the needs of drillng operation safely and fast；The present invention can also carry out
Wellbore integrity is tested, working solution (such as fracturing fluid, acidulant) intrusion in simulated formation fluid or gas production, development process
Influence of the stratum to wellbore integrity, has the characteristics that a tractor serves several purposes, reduces the quantity of laboratory apparatus, saves experiment fees；And
The research that shale wellbore stability and wellbore integrity are carried out using the present invention, it is possible to prevente effectively from borehole well instability when drilling well is gentle
Wellbore integrity missing when hiding exploitation, improves the economic benefit of shale gas exploration and development.
When experiment, by selecting different stream sockets, wellbore stability and two kinds of wellbore integrity experiments can be carried out.
When carrying out wellbore stability experiment, drilling fluid is gone out by the entrance of upper fluid entrance, lower fluid outlet stream, and fluid is from rock core inner wall at this time
Percolation analyzes annular rock core inner wall and surrounding situation of change using visualization system, can carry out Study in Stability of Borehole Wall；It carries out
When wellbore integrity is tested, fluid is entered by lower fluid inlet, upper fluid outlet flows out, and fluid is out of rock core and casing at this time
Portion's seepage flow analyzes rock core interior change situation using visualization system, can carry out wellbore integrity research.
By changing the circulatory mediator in compression pump, different formulations can be carried out, the working solution fluid of heterogeneity (such as bores
Well liquid, fracturing fluid, acidifying solution etc.) experiment；By changing the revolving speed of compression pump, drilling fluid flow velocity comparative experiments can be carried out；It is logical
The temperature setting for changing fluid temperature regulation device is crossed, the drilling fluid under simulation different temperatures can be carried out and wash away borehole wall experiment；It is logical
The pressure setting for changing axis pressure system and confining pressure system is crossed, the drilling fluid under the conditions of simulation different pressures can be carried out and wash away the borehole wall
Experiment or wellbore integrity experiment；Fluid valve is opened, the circulation of drilling fluid in experimentation can be realized.
Detailed description of the invention
Fig. 1 is a kind of mud shale wellbore stability and integrality Visual evaluation schematic device.
Fig. 2 is a kind of mud shale wellbore stability and integrality Visual evaluation apparatus structure block diagram.
In figure: 1- confining pressure hydraulic pump；2- electric hydraulic pump；3- fluid temperature regulation device；4- endoscope signal recorder；5-
CT imaging signal processor；6-CT scanning machine；7- seal rubber cylinder；8- strain gauge；9- temperature sensor；10- flowing out stream
Body collecting pit；11- fluid ingredient analytical instrument；The upper zoom endoscope of 12-；The upper axis of 13- presses piston；Zoom endoscope under 14-；15-
Upper plug；16- rock core reaction kettle body；The upper filter plate of 17-；Plunger under 18-；19- upper fluid entrance；Fluid inlet under 20-；21-
Lower axle presses piston；22- upper fluid outlet；Fluid outlet under 23-；24- axis pressure controller；Filter plate under 25-；26- fluid circulation
Valve；27- computer；Fluid inlet gate valve under 28-；29- upper fluid inlet gate valve；30- upper fluid outlet gate valve；Fluid under 31-
Export gate valve.
Specific embodiment
The present invention will be further described below with reference to the drawings:
As shown in Figure 1 and Figure 2, this mud shale wellbore stability and integrality Visual evaluation device are analyzed by computer is
System, rock core visualization system, fluid control systems, rock core Stress Control system and five part of measuring system composition.Rock core is visual
Change system includes zoom endoscope and CT imaging system；Fluid control systems include electric hydraulic pump 2, fluid temperature regulation device 3
Deng；Rock core control pressurer system includes axis pressure system and confining pressure system；Measuring system includes strain gauge 8, temperature sensor 9
With fluid ingredient analytical instrument 11.When experiment, by selecting different stream sockets, wellbore stability can be carried out and pit shaft is complete
Property two kinds experiment.When carrying out wellbore stability experiment, drilling fluid is entered by upper fluid entrance 19, lower fluid outlet 23 flows out, and is led to
The circulatory mediator changed in compression pump is crossed, the experiment of different formulations drilling fluid can be carried out；By changing the revolving speed of compression pump, i.e.,
It can carry out drilling well flow velocity experiment.Fluid valve 26 is opened, the circulation of drilling fluid in experimentation can be realized.Carry out pit shaft
When integrality is tested, fluid is entered by lower fluid inlet 20, upper fluid outlet 22 flows out, and fluid seeps inside rock core at this time
Stream analyzes rock core interior change situation using visualization system, can carry out the complete Journal of Sex Research of the borehole wall.
The specific structure of this mud shale wellbore stability and integrality Visual evaluation device are as follows: it includes being set in rock core
The rock core reaction kettle body 16 of external tubular, rock core reaction kettle body 16 select the polyamides of high-temperature and high-presure resistent polytetrafluoroethyllining lining
Imines material, 16 upper and lower ends of rock core reaction kettle body are equipped with upper filter plate 17, the lower filter plate 25 for compressing rock core both ends, filtering
Plate is circular steel plate, and the aperture that multiple diameters are 1 mm is distributed in 8 mm or so in thickness thereon, far from the center point distribution compared with
It is more, it is distributed close to the center point less.The center point is provided with the circular hole that diameter is 1 cm.Filter plate outer diameter and rock core reaction kettle body 16
Internal diameter it is identical；Upper filter plate 17 is connected to upper fluid entrance 19 and upper fluid outlet 22, lower filter plate 25 and lower fluid inlet
20 are connected to lower fluid outlet 23, and zoom endoscope 12 is equipped on upper filter plate 17, is equipped with lower change on lower filter plate 25
Burnt endoscope 14, upper zoom endoscope 12 and lower zoom endoscope 14 constitute zoom endoscopic system, the top of upper filter plate 17
The upper axis pressure piston 13 for sealing the rock core reaction kettle body 16 and lower axle pressure piston 21 are installed respectively with the lower part of lower filter plate 25,
Upper plug 15 is installed in the through-hole of upper axis pressure piston 13, lower plunger 18, upper plug are installed in the through-hole of lower axle pressure piston 21
15 and lower plunger 18 and axis pressure controller 24 connect and compose axis pressure system, the outside for being close to rock core reaction kettle body 16 is equipped with temperature biography
Sensor 9 and strain gauge 8 are cased with seal rubber cylinder 7 in the outside of rock core reaction kettle body 16, and seal rubber cylinder 7 and rock core are anti-
The confining pressure chamber that sealing is formed between autoclave body 16 is answered, confining pressure chamber connects confining pressure hydraulic pump 1 by high pressure line.Seal rubber cylinder 7, rock
Heart reaction kettle body 16 and confining pressure hydraulic pump 1 form confining pressure system, and the outside of seal rubber cylinder 7 is provided with CT Scanner 6, CT scan
Machine 6 and CT imaging signal processor 5 connect and compose CT imaging system, and upper fluid entrance 19 is by being provided with upper fluid inlet gate valve
29 pipeline is connected to fluid temperature regulation device 3 and electric hydraulic pump 2, and upper fluid outlet 22 is by being provided with upper fluid outlet lock
The pipeline of valve 30 is connected to outflow fluid collecting pit 10 and fluid ingredient analytical instrument 11, and lower fluid inlet 20 is dirty by being provided with
The pipeline of body inlet gate valve 28 is connected to fluid temperature regulation device 3 and electric hydraulic pump 2, and lower fluid outlet 23 is by being provided with down
The pipeline of fluid outlet gate valve 31 is connected to outflow fluid collecting pit 10 and fluid ingredient analytical instrument 11, and electric hydraulic pump 2 passes through
The pipeline for being provided with fluid valve 26 is connected with outflow fluid collecting pit 10, and the selection of electric hydraulic pump 2 reaches as high as 100
The electric hydraulic pump of MPa；Fluid ingredient analytical instrument 11, CT imaging signal processor 5, strain testing instrument 8, temperature sensor 9, axis
Pressure controller 24, endoscope signal recorder 4 are connect with computer 27, transmit data-signal to computer 27.Strain testing
Instrument 8, temperature sensor 9, fluid ingredient analytical instrument 11 constitute measuring system.Computerized analysis system is installed in computer 27.
Experiment sample in the present invention as wellbore integrity should be the cementing intact rock core sample of inner wall casing.
1, wellbore stability experiment is carried out:
When carrying out wellbore stability experiment, starts computer 27 and each external equipment first, set temperature when experiment
With pressure (including axis pressure and confining pressure) parameter (parameter of setting can be definite value, can also be with function dynamic change).It will be to reality
The drilling fluid tested is connected by pipeline with electric hydraulic pump 2, and upper fluid inlet gate valve 29, lower fluid outlet gate valve 31 and stream are opened
Then body circulation valve 26 starts electric hydraulic pump 2, drilling fluid is pumped into pipeline by electric hydraulic pump 2, into fluid temperature regulation device
3, warm up/down processing is carried out to fluid, then fluid enters upper fluid entrance 19 by upper fluid inlet gate valve 29, into rock
It inside heart reaction kettle body 16, is in contact with rock core sample inner wall, this process is to imitate drilling fluid and page during actual well drilled
The contact on rock stratum.Then drilling fluid from lower fluid outlet 23 flow out rock core reaction kettle body 16, into outflow fluid collecting pit 10,
The drilling fluid of small part outflow enters fluid ingredient analytical instrument 11 through pipeline, after analysis drilling fluid and shale react fluid at
The situation of change divided.Most drilling fluid flows through fluid valve 26, is back to electric hydraulic pump 2 by pipeline, constitutes stream
The circulation of body, i.e., drilling fluid constantly recycles, washes away the process of shale formation during simulation actual well drilled.
2, wellbore integrity experiment is carried out:
When carrying out wellbore integrity experiment, the rock core sample inside and outside wall of simulated formation should be consolidated with casing.It is complete to carry out pit shaft
When whole property is tested, starting computer 27 and each external equipment first, set when experiment temperature and pressure (including axis pressure and
Confining pressure) parameter (parameter of setting can be definite value, can also be with function dynamic change).By working solution (such as pressure break to be tested
Liquid, flushing fluid etc.) or other reacting fluids (can be hydrogen sulfide, carbon dioxide) be connected with electric hydraulic pump 2 by pipeline,
Lower fluid inlet gate valve 28, upper fluid outlet gate valve 30 and fluid valve 26 are opened, electric hydraulic pump 2 is then started, it is electronic
Reacting fluid is pumped into pipeline by hydraulic pump 2, into fluid temperature regulation device 3, is carried out warm up/down processing to fluid, is then flowed
Body enters lower fluid inlet 20 by lower fluid inlet gate valve 28, into inside rock core reaction kettle body 16, inside rock core sample
It is in contact, from rock core sample inside, seepage flow passes through, this process is to imitate various fluids and casing in practical gas production production process
Contact.Then reacting fluid removes large particle by upper filter plate 17(, prevents blocking compression pump, Failure analysis instrument) from
Upper fluid outlet 22 flows out rock core reaction kettle body 16, and into outflow fluid collecting pit 10, the reacting fluid of small part outflow is through pipe
Line enters fluid ingredient analytical instrument 11, the variation of fluid composition after analysis reacting fluid and shale and the cementing place of casing react
Situation.Most reacting fluid flows through fluid valve 26, is back to electric hydraulic pump 2 by pipeline, constitutes following for fluid
Ring simulates reacting fluid in practical gas production production process and constantly washes away, seepage flow shale formation, corrodes casing and cement
Process.
The present invention can carry out rock core sample under conditions of simulating underground high temperature and high pressure environment and circulatory fluid flow
Drilling fluid or the damage test of other working solution fluid scourings.Pass through high-resolution zoom endoscope and computed tomography
(CT) degree and wall building situation that measurement and imaging means, in real time observation and the record simulation borehole wall wash away, the simulation borehole wall are external
Expanding, undergauge after fluid erosion and the degree to collapse.The present invention can also simulate working solution when carrying out gas production exploitation and (wash simultaneously
Well liquid, fracturing fluid, acidifying solution etc.) to the damage of shale reservoir integrality, it is overall merit oil gas field working solution to pit shaft
Influence provide new integrated test facility.The present invention can truer simulation subsurface environment, dynamic evaluation wellbore stability
With wellbore integrity situation, circulatory mediator can be changed, facilitate preferred drilling mode and drilling fluid system；It can the nearly well of overall merit
Wall stratum permeability and wellbore integrity；It realizes borehole wall real time imagery, observes more intuitive；It is practical, there is Repeatability
The features such as good, easy to operate, performance is stablized.
Claims (2)
1. a kind of mud shale wellbore stability and integrality Visual evaluation device, it is characterised in that: this mud shale wellbore stability
And integrality Visual evaluation device include rock core reaction kettle body (16), filter plate, seal rubber cylinder (7), CT Scanner (6),
The filter plate for compressing rock core both ends, each mistake is respectively set in computer (27), upper port, the lower port of rock core reaction kettle body (16)
The axis pressure piston of sealing rock core reaction kettle body (16) is respectively mounted at filter plate, a plunger is arranged in the center of each axis pressure piston, often
A plunger is connect with axis pressure controller (24), and a zoom endoscope is additionally provided at each filter plate, is peeped in each zoom
Mirror is connect with endoscope signal recorder (4)；Rock core reaction kettle body (16) occupy in seal rubber cylinder (7), rock core reaction kettle
Annular chamber between body (16) and seal rubber cylinder (7) is confining pressure chamber, and confining pressure chamber connects confining pressure hydraulic pump by high pressure line
(1)；The outside for being close to rock core reaction kettle body (16) is equipped with temperature sensor (9) and strain gauge (8)；Seal rubber cylinder (7)
Outside be provided with CT Scanner (6), CT Scanner (6) connect CT imaging signal processor (5)；On rock core reaction kettle body (16)
The filter plate at end is connected to upper fluid entrance (19) and upper fluid outlet (22), the filter plate of rock core reaction kettle body (16) lower end and
Lower fluid inlet (20) is connected to lower fluid outlet (23), upper fluid outlet (22), lower fluid outlet (23) with outflow fluid
Collecting pit (10) is connected to fluid ingredient analytical instrument (11)；Fluid ingredient analytical instrument (11), is answered at CT imaging signal processor (5)
Become measuring instrument (8), temperature sensor (9), axis pressure controller (24), endoscope signal recorder (4) to connect with computer (27)
It connects, transmits data-signal to computer (27)；
The upper fluid entrance (19) by be provided with upper fluid inlet gate valve (29) pipeline and fluid temperature regulation device (3)
Be connected to electric hydraulic pump (2), lower fluid inlet (20) by be provided with lower fluid inlet gate valve (28) pipeline and fluid temperature
Degree adjuster (3) be connected to electric hydraulic pump (2), electric hydraulic pump (2) by be provided with fluid valve (26) pipeline and
Outflow fluid collecting pit (10) is connected；
When experiment, by selecting different stream sockets, wellbore stability and two kinds of wellbore integrity experiments is carried out, the borehole wall is carried out
When stablizing experiment, drilling fluid is entered by upper fluid entrance, lower fluid outlet stream goes out, and fluid flows from rock core inner wall at this time, benefit
Annular rock core inner wall and surrounding situation of change are analyzed with visualization system, carries out Study in Stability of Borehole Wall；Carry out wellbore integrity
When experiment, fluid is entered by lower fluid inlet, upper fluid outlet flows out, and fluid is sharp from rock core and inside pipe casing seepage flow at this time
Rock core interior change situation is analyzed with visualization system, carries out wellbore integrity research；
By changing the circulatory mediator in electric hydraulic pump, the working solution fluid experiment of different formulations, heterogeneity is carried out；Pass through
Change the revolving speed of electric hydraulic pump, carries out the comparative experiments of drilling fluid flow velocity；By changing the temperature setting of fluid temperature regulation device,
It carries out the drilling fluid under simulation different temperatures and washes away borehole wall experiment.
2. mud shale wellbore stability according to claim 1 and integrality Visual evaluation device, it is characterised in that: described
Filter plate be circular steel plate, thickness in 8 mm, be distributed with thereon multiple diameters be 1 mm aperture, far from the center point distribution compared with
It is more, it is distributed close to the center point less；The center point is provided with the circular hole that diameter is 1 cm.
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| CN201610146026.6A CN105804738B (en) | 2016-03-15 | 2016-03-15 | A kind of mud shale wellbore stability and integrality Visual evaluation device |
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| CN201610146026.6A CN105804738B (en) | 2016-03-15 | 2016-03-15 | A kind of mud shale wellbore stability and integrality Visual evaluation device |
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| CN105804738B true CN105804738B (en) | 2019-04-19 |
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| CN106198928A (en) * | 2016-08-05 | 2016-12-07 | 西南石油大学 | Full-hole core acidizing wormhole growth simulation device and experimental technique |
| CN108397191A (en) * | 2018-03-28 | 2018-08-14 | 中海石油(中国)有限公司湛江分公司 | A kind of wellbore stability experimental provision of simulation oil/gas well underground actual condition |
| CN108661626B (en) * | 2018-08-02 | 2023-11-21 | 西南石油大学 | High-temperature high-pressure well wall water invasion simulation experiment device |
| CN111693428A (en) * | 2019-03-15 | 2020-09-22 | 中国石油化工股份有限公司 | Visual experimental device and method for measuring rock imbibition under stratum condition |
| CN110441159B (en) * | 2019-08-30 | 2024-06-07 | 湖南科技大学 | Simulation test device and method for well wall bearing characteristics under hydraulic coupling effect |
| CN111024584A (en) * | 2019-12-30 | 2020-04-17 | 中国石油大学(华东) | Acid rock reaction double-rock-plate fracture-cave simulation device and working method thereof |
| CN114658411B (en) * | 2022-03-17 | 2023-04-11 | 中国石油大学(华东) | Device and method for evaluating integrity of shaft after high-pressure oil and gas well pipe column is blocked |
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2016
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003174A (en) * | 2010-09-19 | 2011-04-06 | 中国海洋石油总公司 | Simulated experiment device of three-dimension radial flow sieve tube |
| CN201965076U (en) * | 2010-12-17 | 2011-09-07 | 中国石油天然气股份有限公司 | Anisotropic multilayer rock core gripper for CT (computerized tomography) scanning |
| CN103161455A (en) * | 2011-12-15 | 2013-06-19 | 长江大学 | High temperature and high pressure shale well wall stability evaluation device |
| CN203271733U (en) * | 2013-04-10 | 2013-11-06 | 西南石油大学 | Testing device used for evaluating stability of well wall in gas drilling process |
| CN103758513A (en) * | 2014-01-10 | 2014-04-30 | 西南石油大学 | Method for evaluating simulation of full-size well wall stability |
| CN103775070A (en) * | 2014-01-10 | 2014-05-07 | 西南石油大学 | Full-size well wall stable simulator |
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