CN104034745B - A kind of high pressure nuclear magnetic resonance CO2geological storage model assay systems - Google Patents
A kind of high pressure nuclear magnetic resonance CO2geological storage model assay systems Download PDFInfo
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Abstract
The invention discloses a kind of high pressure nuclear magnetic resonance CO2Geological storage model assay systems, load control system is connected with sample visual inspection system by pipeline, fluid control systems is connected with the core holding unit in sample visual inspection system by fluid injection conduit road, axial compression sensor in data acquisition processing system, confined pressure sensor is separately mounted to load control system axis press pump, on the pipeline that confined pressure pump is connected with core holding unit, left part hydraulic pressure sensor in data acquisition processing system, right part hydraulic pressure sensor is connected on the pipeline that in fluid control systems, left part salt water injection pump is connected with core holding unit with right part salt water injection pump, gas injection pressure sensor in data acquisition processing system, flowmeter is connected to CO in fluid control systems2On the pipeline that injection pump is connected with core holding unit.CO under research different temperatures, different vertical stress and varying level stress condition2The Distortion Disciplinarian of migration rule, reservoir and cap rock in reservoir and cap rock.
Description
Technical field
The present invention relates to a kind of model assay systems, particularly relate to a kind of high pressure nuclear magnetic resonance CO2Geological storage model tries
Check system, it is applicable to simulate CO under true environment2Geological storage process, is additionally operable to study different temperatures, different primary stress
Under the conditions of CO2Migration rule in reservoir and cap rock and reservoir and the Distortion Disciplinarian of cap rock.
Background technology
CO2Geological storage technology is when former very effective greenhouse-gas control means.Substantial amounts of CO2Inject stratum
Can cause the increase of pore pressure, thus cause the reduction of rock mass effective stress, meanwhile, the change of effective stress in turn can shadow
The porosity of phonolite body, permeability and capillary pressure, and then to CO2Migration produce impact.In this seepage flow-mechanics phase interaction
During with, it is possible to a series of mechanics problems such as activation causing the unstability of cap rock, tomography, also can result in CO simultaneously2
Leakage, therefore, study CO2Migration rule and the Distortion Disciplinarian of storage, cap rock rock mass in storage, cap rock have important
Engineering significance.
Research great majority for the problems referred to above concentrate on numerical simulation aspect at present, and study very in terms of laboratory test
Few.Nuclear magnetic resonance technique is at CO2Research in terms of geological storage is concentrated mainly on the two-phase fluid displacement experiment of rock core yardstick, right
Less in the test considering mechanics influence, and the test simultaneously simulating storage, cap rock system variant destruction and seepage flow change there is no.
Summary of the invention
The invention aims to overcome the deficiency of current research means, be to there are provided a kind of high pressure nuclear magnetic resonance
CO2Geological storage model assay systems, the present invention is used for CO2The study mechanism that geological storage seepage flow-mechanics interacts, specifically
In fact, the CO under research different temperatures, different vertical stress and varying level stress condition2Migration rule in reservoir and cap rock
Rule, reservoir and the Distortion Disciplinarian of cap rock.Means are visualized, it is possible to observe CO by nuclear magnetic resonance2In storage, cap rock system
In migration process and storage, the process of deformation and failure of cap rock, meanwhile, CO can be studied2Rock mass porosity in injection process, full
Change with degree, permeability and capillary pressure etc. and the deformation displacement of storage cap rock, study maximum allowable injection pressure, research storage,
The mechanical stability of cap rock (containing tomography) and integrality, for heightened awareness CO2The seepage flow of geological storage process-mechanics interacts
A kind of new research means is provided.
In order to realize above-mentioned purpose, the present invention uses techniques below measure:
Its technology is conceived:
1, sample analog material pours, and is shaped as cuboid, is divided into upper, middle and lower-ranking, and centre is reservoir, upper and lower part
It is divided into cap rock, and keeps symmetrical, prevent from applying sample eccentric bending during xial feed.In process of the test, specimen surface heat
Heat-Shrinkable Tubings parcel pyrocondensation fastening, prevent fluid from forming surface stream.Specimen shape is as shown in Figure 1.
2, the confined pressure circulating heater of design can the simultaneously temperature of adjusting sample and confined pressure, to simulate real stratum
Pressure and temperature；The horizontal charger of design can apply different horizontal loadings to sample, to simulate different horizontal structures
Make stress.
3, the salt water injection pump on left and right both sides provides level pressure or constant flow boundary condition, CO to the left and right end of sample2Inject
Pump injects CO toward reservoir2, and with integrated flow in flow sensor and pressure sensor record injection process and injection pressure with
The variation tendency of time.
4, CO is observed with nuclear magnetic resonance technique2Migration and the deformation failure of storage cap rock, and determine sample by inverting
Porosity, permeability, capillary pressure, saturation degree, each to the isoparametric change of displacement.
A kind of high pressure nuclear magnetic resonance CO2Geological storage model assay systems, it is by sample visual inspection system, load control
System processed, fluid control systems and data acquisition processing system composition, the annexation between each system is: load controls system
System is connected with sample visual inspection system by pipeline, is provided by pipeline core holding unit in visual inspection system
Need axial compression and the confined pressure being applied on sample；Fluid control systems is by fluid injection conduit road and sample visual inspection system
In core holding unit connect, by core holding unit salt water needed for sample injection testing and CO2；Data acquisition process system
Axial compression sensor in system, confined pressure sensor are separately mounted to load control system axis press pump, confined pressure pump and core holding unit
On the pipeline being connected, force value is also passed to information acquisition card by data wire by monitoring axial compression pump, the pressure of confined pressure pump；Data acquisition
Left part hydraulic pressure sensor in collection processing system, right part hydraulic pressure sensor are connected to left part salt water note in fluid control systems
Enter on the pipeline that pump is connected with core holding unit with right part salt water injection pump, monitoring left part hydraulic pressure sensor, right part hydraulic pressure sensing
Force value is also passed to information acquisition card by data wire by the pressure of device；Gas injection pressure sensor in data acquisition processing system,
Flowmeter is connected to CO in fluid control systems2On the pipeline that injection pump is connected with core holding unit, monitor CO2Injection pump injects
Pressure and flow force value is passed to information acquisition card by data wire；Difference gauge two ends in data acquisition processing system
It is connected on the pipeline that left part salt water injection pump is connected with core holding unit with right part salt water injection pump, monitors left and right two
The difference of the fluid pressure that end injects, and the pressure differential recorded is passed to information acquisition card.In sample visual inspection system
NMR connected the computer in data acquisition processing system by data wire.
Sample visual inspection system includes: sample, core holding unit, thermal shrinkable sleeve, cushion block, NMR.Connect and close
System is: sample keeps the consistent adjacent docking of center line with cushion block.Thermal shrinkable sleeve is enclosed within sample and cushion block outer pyrocondensation fastening.Thermal shrinkable sleeve,
Sample and cushion block are inserted in specimen holder.Specimen holder is placed horizontally in the probe coil of NMR.Rock core presss from both sides
Holder passes through cushion block to test pressure axial compressive force or injected media.Thermal shrinkable sleeve prevents from forming surface stream.NMR is used for
Observation fluid migration in the sample.
Load control system includes: axial compression pump, confined pressure pump, temperature control circulator.Axial compression pump is made for applying level to sample
Firmly, axial compression pump and confined pressure pump are without being directly connected to, and axial compression pump and temperature control circulator are without being directly connected to.Confined pressure pump is for executing to sample
Add hoop active force.Temperature control circulator is connected by pipeline with confined pressure pump, by controlling the medium temperature in pipeline, in permanent confined pressure
Under the conditions of provide different temperature conditions to sample.
Fluid control systems includes: left part salt water injection pump, right part salt water injection pump, CO2Injection pump, fluid temperature control dress
Putting, its annexation is: left part salt water injection pump and core holding unit are connected by salt water flow in pipes.Right part salt water injection pump
Connected by salt water flow in pipes with core holding unit.CO2Injection pump and core holding unit pass through CO2Flow in pipes connects.Fluid
Attemperating unit by add hot channel respectively with left part salt water injection pump, right part salt water injection pump and CO2Injection pump connects.Left part is salty
Water injection pump and right part salt water injection pump apply constant voltage or constant flow boundary condition, CO to respectively the left and right two ends of sample2Inject
Pump injects CO bottom the reservoir of sample2To simulate supercritical CO2The process of displacement salt water, fluid attemperating unit is used for controlling whole
The temperature of individual ambient fluid pipeline.
Data acquisition processing system includes: axial compression sensor, confined pressure sensor, left part hydraulic pressure sensor, right part hydraulic pressure pass
Sensor, gas injection pressure sensor, flowmeter, difference gauge, information acquisition card, computer, its annexation is: axial compression sensor, confined pressure
Sensor, left part hydraulic pressure sensor, right part hydraulic pressure sensor, gas injection pressure sensor, flowmeter and difference gauge pass through data respectively
Line is connected with information acquisition card, and information acquisition card is connected with computer by data wire.Axial compression sensor is used for monitoring axial compression pump to be executed
Add to the active force of sample, and by the pressure transmission that records to information acquisition card.Confined pressure sensor is used for monitoring confined pressure pump and applies
To the active force of sample, and by the pressure transmission that records to information acquisition card.Left part hydraulic pressure sensor and right part hydraulic pressure sensor
It is respectively used to monitor the fluid pressure that left part salt water injection pump and right part salt water injection pump inject respectively to the left and right two ends of sample,
And by the pressure transmission that records to information acquisition card.Gas injection pressure sensor and flowmeter are respectively used to monitor CO2Injection pump is to examination
The CO that sample injects2Pressure and flow, and the pressure recorded and flow are passed to information acquisition card.Difference gauge is used for monitoring left part
Salt water injection pump and right part salt water injection pump give the difference of fluid pressure that the left and right two ends of sample are injected respectively, and will record
Pressure differential passes to information acquisition card.Information acquisition card is used for concentrating axial compression sensor, confined pressure sensor, left part hydraulic pressure to sense
Device, right part hydraulic pressure sensor, gas injection pressure sensor, flowmeter and the pressure of difference gauge monitoring or flow value, unification sends electricity to
Brain.Computer is used for recording and show axial compression sensor, confined pressure sensor, left part hydraulic pressure sensor, right part hydraulic pressure sensor, gas injection
Pressure sensor, flowmeter and the pressure of difference gauge monitoring or flow value.
The present invention has the advantages that:
(1) experimental condition close to engineering reality can be provided.Sample design layered is stored up with simulated field, cap rock knot
Structure；Confined pressure and axial compression device are to simulate initial field stress condition；Temperature control EGR can be with the formation temperature bar of simulated field
Part；Salt water injection pump can be with the boundary condition of seepage flow of simulated field；Gas injection pump can inject or constant flow with the level pressure of simulated field
Injection mode.
(2) non-destructive monitoring.NMR can utilize the nmr phenomena of hydrogen atom in hydrone to observe that water exists
Migration phenomenon in sample, such that it is able to observe CO2The process of deformation and failure of migration, reservoir and cap rock；Additionally by profit
By relaxation time spectrum and the nuclear magnetic signal intensity of hydrogen atom, can be with inverting two phase saturation, permeability, capillary pressure etc..Above-mentioned
Monitoring process, without destroying sample, can complete under normal test conditions.
(3) seepage flow-Coupling with Mechanics process can be simulated.CO2Injection cause storage, the change of effective seal rock stress, and then
Cause it to deform, meanwhile, storage, cap rock ess-strain also can be to CO2Migration produce impact.The present invention had both included load
Control system, includes again fluid control systems, can simulate the process that seepage flow-mechanics interacts simultaneously.
(4) it can be considered that the geologic body such as tomography, crack.Sample forms by manually pouring, and therefore, it can in storage, cap rock
Comprise the geologic body such as tomography, crack.
(5) there is several functions.Research CO2Migration rule and storage overburden deformation failure law；Research gas-injection pressure control；
Research storage, cap rock and tomography stability；Research CO2Geological storage capacity etc..
In a word, the present invention is at CO2Geological storage study mechanism aspect has the strongest applicability, simultaneously as can be true
Real simulated field physical condition, therefore, it may have engineer applied is worth.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of sample.
Fig. 2 is a kind of high pressure nuclear magnetic resonance CO2Geological storage model assay systems schematic diagram.
Fig. 3 is a kind of core holding unit skiagraph schematic diagram.
Fig. 4 is the overall structure schematic front view of a kind of core holding unit.
Fig. 5 is a kind of high pressure nuclear magnetic resonance CO2The structural representation of geological storage model assay systems.
Fig. 6 is the concrete structure schematic diagram of Fig. 5.
In figure:
1000 sample visual inspection systems:
1100 sample 1101 sample cap rock 1102 sample reservoir 1103 sample cap rock 1200 rocks
Heart clamp holder 1300 thermal shrinkable sleeve 1500 NMR (MacroMR12-150H)
2000 load control systems:
2100 axial compression pumps (ISCO-65D measuring pump) 2200 confined pressure pump (ISCO-E500 measuring pump) 2300
Temperature control circulator (thermostatic oil bath FC94Y)
3000 fluid control systems:
3100 left part salt water injection pump (ISCO-E500 measuring pump) 3200 right part salt water injection pump (ISCO-E500
Measuring pump) 3300 CO2Injection pump (ISCO-260D measuring pump) 3400 fluid attemperating unit (FC300A Water Tank with Temp.-controlled)
4000 data acquisition processing systems:
4100 axial compression sensor (SETRA-C20450cpgg311e2s00) 4200 confined pressure sensor (SETRA-
C20450cpgg311e2s00) 4300 left part hydraulic pressure sensor (SETRA-C20450cpgg311e2s00) 4400
Right part hydraulic pressure sensor (SETRA-C20450cpgg311e2s00) 4500 gas injection pressure sensor (SETRA-
C20450cpgg311e2s00) 4600 flowmeters (Bronkhorst-M13-IP65) 4700 difference gauge 4800
Information acquisition card 4900 computer.
Detailed description of the invention
Embodiment 1:
A kind of high pressure nuclear magnetic resonance CO2Geological storage model assay systems, by sample visual inspection system 1000, load
Control system 2000, fluid control systems 3000 and data acquisition processing system 4000 form, and its annexation is: load controls
System 2000 is connected with sample visual inspection system 1000, by pipeline in visual inspection system 1000 by pipeline
Core holding unit 1200 provides to be needed to be applied to the axial compression on sample 1100 and confined pressure.Fluid control systems 3000 is noted by fluid
Enter pipeline and the sample downstream water injection hole 1203 of core holding unit 1200 in sample visual inspection system 1000, sample downstream
Water injection hole 1205 and CO2Hand-hole 1220 connects, by the core holding unit 1200 salt water needed for sample 1100 injection testing
And CO2.Axial compression sensor 4100, confined pressure sensor 4200 in data acquisition processing system 4000 are separately mounted to load control
On the pipeline that system 2000 axis press pump (2100), confined pressure pump 2200 are connected with core holding unit 1200, monitoring axial compression pump 2100,
Force value is also passed to information acquisition card 4800 by data wire by the pressure of confined pressure pump 2200.In data acquisition processing system 4000
Left part hydraulic pressure sensor 4300, right part hydraulic pressure sensor 4400 be connected in fluid control systems 3000 left part salt water note
Enter on the pipeline that pump 3100 is connected with core holding unit 1200 with right part salt water injection pump 3200, monitor left part hydraulic pressure sensor
4300, the pressure of right part hydraulic pressure sensor 4400 force value passed to information acquisition card 4800 by data wire.Data acquisition
Gas injection pressure sensor 4500, flowmeter 4600 in processing system 4000 are connected to CO in fluid control systems 30002Injection pump
On 3300 pipelines being connected with core holding unit 1200, monitor CO2The pressure (pressure limit 0-25MPa) that injection pump 3300 injects
With flow and by data wire, force value passed to information acquisition card 4800.Difference gauge in data acquisition processing system 4000
4700, two ends are connected to left part salt water injection pump 3100 and are connected with core holding unit 1200 with right part salt water injection pump 3200
Pipeline on, monitor the difference of fluid pressure that left and right two ends are injected, and the pressure differential recorded passed to information acquisition card
4800.NMR 1500 in sample visual inspection system 1000 connects data acquisition processing system by data wire
Computer 4900 in 4000.
Sample visual inspection system 1000 includes: sample 1100, core holding unit 1200, thermal shrinkable sleeve 1300, nuclear-magnetism are common
Vibration Meter 1500, its annexation is: sample 1100 is placed in core holding unit 1200, and under sample upstream cushion block 1215, sample
Trip cushion block 1217 keeps the consistent adjacent docking of center line.Thermal shrinkable sleeve 1300 is enclosed within sample upstream cushion block 1215, sample 1100 and examination
The outer pyrocondensation of sample downstream cushion block 1217 fastens.Thermal shrinkable sleeve 1300, sample 1100 and sample upstream cushion block 1215, sample downstream cushion block
1217 are inserted in specimen holder 1200.Specimen holder 1200 is placed horizontally in the probe coil of NMR 1500.
Core holding unit 1200 is pressed axial compressive force or note to sample 1100 by sample upstream cushion block 1215, sample downstream cushion block 1217
Enter salt water.Thermal shrinkable sleeve 1300 prevents from forming surface stream.NMR 1500 is for observing fluid migration in sample 1100.
Core holding unit 1200 includes: clamper end cap 1201, fixing stifled 1202, sample downstream water injection hole 1203, stack shell
1204, sample upstream water injection hole 1205, oil cylinder downstream oil filler point 1206, oil cylinder upstream oil filler point 1207, cylinder cover 1208, position
Displacement sensor pillar 1209, WYDC-10L type pressure lever type displacement transducer 1210(range 10mm, precision ± 0.1%F.S, size ф
20 × 205mm), sealing ring 1211, oil cylinder 1212, piston 1213, circulation hydraulic oil inlet 1214, sample upstream cushion block 1215,
Sample downstream cushion block 1217, circulation hydraulic oil outlet 1218, bolt 1219, CO2Hand-hole 1220.
The concrete connected mode of core holding unit 1200 is as follows:
1. clamper end cap 1201 is connected with bolt 1219 with fixing stifled 1202.Circulation hydraulic oil outlet 1218 is for fixing stifled
Perforate within 1202, fixes stifled 1202 with stack shell 1204 with threadeding.Stack shell 1204 with oil cylinder 1212 with threadeding.Oil
Cylinder downstream oil filler point 1206, oil cylinder upstream oil filler point 1207 and circulation hydraulic oil inlet 1214 are the perforate within oil cylinder 1212,
Oil cylinder 1212, and is sealed by sealing ring 1211 with threadeding with cylinder cover 1208, and sample upstream water injection hole 1205 is sample
Perforate within upstream cushion block 1215.Sample upstream cushion block 1215 is inserted directly into piston 1213 and is attached, the water filling of sample downstream
Hole 1203 is the perforate within sample downstream cushion block 1217.Sample downstream cushion block 1217 is inserted directly into clamper end cap 1201 to be carried out
Connect.Core sample 1100 is placed between sample upstream cushion block 1215 and sample downstream cushion block 1217, makes upstream cushion block 1215, rock
Heart sample 1100 keeps consistent with downstream cushion block 1217 center line, puts heat-shrink tube the most outside, and is allowed to heat with heat gun
Tighten solid.Displacement transducer pillar 1209 with piston 1213 with threadeding.Displacement transducer pillar 1209 and pressure lever type displacement
Sensor 1210 clamping connects.
2. what stack shell 1204, sample upstream cushion block 1215 and sample downstream cushion block 1217 all used without nuclear magnetic signal is high-strength
PEEK materials processing forms, and can transmit enough loads, and again without interference with the nuclear magnetic signal in experimentation, other parts are equal
Process for stainless steel material.Sample downstream cushion block 1217 and sample upstream cushion block 1215 are positioned at the left and right two ends of sample 1100,
Centre is machined with sample downstream water injection hole 1203 and sample upstream water injection hole 1205, and on the transverse plane that it presses close to sample 1100
It is carved with circumferential groove.Downstream water injection hole 1203 and sample upstream water injection hole 1205 pipeline and left part salt water injection pump 3100 and the right side
Portion's salt water injection pump 3200 is connected.Therefore, downstream water injection hole 1203 and sample upstream water injection hole 1205 can be used to transmit axial lotus
Carry and apply border pore pressure power to sample 1100.
3. circulation hydraulic oil inlet 1214 and circulation hydraulic oil outlet 1218 are connected with external heating, pressurized circulation system,
Apply confined pressure and control temperature to sample 1100.Oil cylinder upstream oil filler point 1207 is connected with external pump, injects toward oil cylinder 1212
Oil body, when promoting piston 1213 to advance, applies xial feed to core sample 1100 by sample upstream cushion block 1215, position simultaneously
Displacement sensor pillar 1209 and pressure lever type displacement transducer 1210 are followed piston 1213 and are moved, and measure the axial of core sample 1100
Deformation.；Oil cylinder downstream oil filler point 1206 is connected with external pump, can be used for promoting piston 1213 backhaul, it addition, before piston 1213
When feeding core sample 1100 applies axial compression, oil cylinder downstream oil filler point 1206 also can be used to get rid of oil body.Sample downstream water injection hole
1203, sample upstream water injection hole 1205 is connected with external pump, for injecting fluid or application well flanging to core sample 1100
The sample upstream water injection hole 1205 inside boundary's condition, oil cylinder 1212 and sample upstream cushion block 1215 PEEK without nuclear magnetic signal manages
It is connected；CO2Hand-hole 1220 is in identical section with sample upstream water injection hole 1205, circulation hydraulic oil inlet 1214, and
Three's shape is identical.
4. sample upstream cushion block 1215 is all processed into barrel band form with the afterbody of sample downstream cushion block 1217, inserts respectively
Enter in the groove of clamper end cap 1201 and piston 1213, can freely dismantle and install；Under sample upstream cushion block 1215 and sample
The main part of trip cushion block 1217 can be processed into circular or square, and variable-length moves, for difformity and the examination of size
Sample, it addition, the cross section of main part is bigger than afterbody cross section, the xial feed applied for loading piston 1213.
Load control system 2000 includes: axial compression pump 2100, confined pressure pump 2200, temperature control circulator 2300, its annexation
It is: axial compression pump 2100 for applying the axial compressive force of 0 ~ 330kN to sample 1100, and axial compression pump 2100 and confined pressure pump 2200 are without directly
Connecting, axial compression pump 2100 and temperature control circulator 2300 are without being directly connected to.Confined pressure pump 2200 is made for applying hoop to sample 1100
Firmly.Temperature control circulator 2300 is connected by pipeline with confined pressure pump 2200, by controlling the medium temperature in pipeline, in permanent confined pressure
Under the conditions of provide different temperature conditions to sample 1100.
Fluid control systems 3000 includes: left part salt water injection pump 3100, right part salt water injection pump 3200, CO2Injection pump
3300, fluid attemperating unit 3400, its annexation is: left part salt water injection pump 3100, right part salt water injection pump 3200, CO2
Injection pump 3300, fluid attemperating unit 3400, annexation is: left part salt water injection pump 3100 and the examination of core holding unit 1200
Sample downstream water injection hole 1203 is connected by salt water flow in pipes.Right part salt water injection pump 3200 and the sample of core holding unit 1200
Upstream water injection hole 1205 is connected by salt water flow in pipes.CO2Injection pump 3300 and the CO of core holding unit 12002Hand-hole
1220 pass through CO2Flow in pipes connects.Fluid attemperating unit 3400 by add hot channel respectively with left part salt water injection pump 3100,
Right part salt water injection pump 3200 and CO2Injection pump 3300 connects.Left part salt water injection pump 3100 and right part salt water injection pump 3200
Apply constant voltage or constant flow boundary condition, CO to respectively the left and right two ends of sample 11002Injection pump 3300 is toward the storage of sample 1100
CO is injected bottom Ceng2To simulate supercritical CO2The process of displacement salt water, fluid attemperating unit 3400 is used for controlling whole circumferential flux
The temperature of body pipeline.
Data acquisition processing system 4000 includes: axial compression sensor 4100, confined pressure sensor 4200, left part hydraulic pressure sensor
4300, right part hydraulic pressure sensor 4400, gas injection pressure sensor 4500, flowmeter 4600, difference gauge 4700, information acquisition card 48,
Computer 49, its annexation is: axial compression sensor 4100, confined pressure sensor 4200, left part hydraulic pressure sensor 4300, right part hydraulic pressure
Sensor 4400, gas injection pressure sensor 4500, flowmeter 4600 and difference gauge 4700 are respectively by data wire and information acquisition card
4800 connect, and information acquisition card 4800 is connected with computer 4900 by data wire.Axial compression sensor 4100 is used for monitoring axial compression pump
2100 active forces being applied to sample 1100, and by the pressure transmission that records to information acquisition card 4800.Confined pressure sensor 4200
The active force of sample 1100 it is applied to for monitoring confined pressure pump 2200, and by the pressure transmission that records to information acquisition card 4800.
Left part hydraulic pressure sensor 4300 and right part hydraulic pressure sensor 4400 are respectively used to monitor left part salt water injection pump 3100 and right part is salty
Water injection pump 3200 gives the fluid pressure that the left and right two ends of sample 1100 are injected respectively, and the pressure transmission recorded is adopted to information
Truck 4800.Gas injection pressure sensor 4500 and flowmeter 4600 are respectively used to monitor CO2Injection pump 3300 injects to sample 1100
CO2Pressure and flow, and the pressure recorded and flow are passed to information acquisition card 4800.Difference gauge 4700 is used for monitoring a left side
Portion's salt water injection pump 3100 and right part salt water injection pump 3200 give the difference of the fluid pressure of sample 1100 left and right two ends injection respectively
Value, and the pressure differential recorded is passed to information acquisition card 4800.Information acquisition card 4800 be used for concentrating axial compression sensor 4100,
Confined pressure sensor 4200, left part hydraulic pressure sensor 4300, right part hydraulic pressure sensor 4400, gas injection pressure sensor 4500, flowmeter
4600 and the pressure of difference gauge 4700 monitoring or flow value, unified send computer 4900 to.Computer 4900 is used for recording and showing
Axial compression sensor 4100, confined pressure sensor 4200, left part hydraulic pressure sensor 4300, right part hydraulic pressure sensor 4400, note air pressure transmission
Sensor 4500, flowmeter 4600 and the pressure of difference gauge 4700 monitoring or flow value.
The present invention is used for CO2The study mechanism of the seepage flow of geological storage-mechanics interaction process, in conjunction with Fig. 5, Fig. 6 couple
Concrete operations flow process is described in detail:
1. it is similarly configured material, and pours into cuboid sample 1100, after steam curing sample reaches the intensity of regulation,
Sample is put into vacuum drying chamber and vacuumizes dry.
2. connect the ascending pipe joint of each position of sample 1100, coat fluid sealant, then on four water chestnut limits of sample
Put heat-shrink tube 1300 to sample, and make heat-shrink tube pyrocondensation shape with hair dryer, be close to sample.
3. sample 1100 is loaded specimen holder 1200, be placed in sample upstream cushion block 1215 and sample downstream cushion block
Between 1217, open F2 and F3, with axial compression pump 2100, sample is applied a less axial compression, it is ensured that sample can be with when keeping flat
Sample upstream cushion block 1215, sample downstream cushion block 1217 inside core holding unit 1200 are closely coupled.
4. open F4 and F7, close F5 and F6, by the confined pressure pump 2200 circulation hydraulic oil inlet by clamper 1200
1214 toward injecting fluorocarbon oil in specimen holder 1200, and to control confined pressure be certain fixed value.
5. F5 and F6, ON cycle temperature controller 2300, continuous circulating-heating are opened, until the temperature of the circulatory system reaches
Certain fixed value.
6. regulation axial compression pump 2100, increases axial compressive force and remains certain fixed value, and lives with displacement transducer record
The initial displacement value of plug.
7. regulation fluid attemperating unit 3400, left part salt water injection pump 3100, right part salt water injection pump 3200, CO2 note
Enter pump 3300 and fluid piping system is heated to certain value and keeps constant.
8. open F12, F14, F17 and F20, close F15, F18 and F19, with left part salt water injection pump (3100) from sample
NaCl solution is slowly injected in one end of 1100, and unlatching NMR 1500 monitors the change of nuclear magnetic signal intensity simultaneously, treats
The nuclear magnetic signal intensity of whole sample keep constant after, i.e. after the saturated NaCl solution of sample, open F15, regulation left part salt water note
Enter pump 3100 and right part salt water injection pump 3200 pressure to a certain fixed value, and keep both as far as possible pressure equal.Open F18 and
F19, closes F15, measures two ends pressure reduction with difference gauge 4700, constantly regulation two ends salt water injection pump, and the reading making difference gauge is
Zero.
9. CO is used2Injection pump 3300 injects CO with constant voltage mode or constant flow pattern toward reservoir2, sense with gas injection pressure
Device 4500 and flowmeter 4600 record injection process integrated flux and inject pressure change procedure；With displacement transducer record piston
Displacement.
10. the CO of whole injection process is recorded with NMR 15002Migration process and storage overburden deformation destructive process.
Below in conjunction with the accompanying drawings relevant functional part is described in detail:
One, sample visual inspection system 1000:
Sample visual inspection system 1000 includes: sample 1100, specimen holder 1200, thermal shrinkable sleeve 1300, nuclear-magnetism are common
Vibration Meter 1500.
1, sample 1100:
As it is shown in figure 1, sample is rectangular structure, it is divided into upper, middle and lower-ranking with the storage in simulation Practical Project, cap rock
System, sample analog material pours and forms, and can build tomography, crack in the sample.
2, specimen holder 1200:
Such as Fig. 3, Fig. 4, core holding unit 1200 includes: holder end cap 1201, fixing stifled 1202, sample downstream water injection hole
1203, stack shell 1204, sample upstream water injection hole 1205, oil cylinder downstream oil filler point 1206, oil cylinder upstream oil filler point 1207, oil cylinder end
Lid 1208, displacement transducer pillar 1209, WYDC-10L type pressure lever type displacement transducer 1210(range 10mm, precision ± 0.1%
F.S, size ф 20 × 205mm), sealing ring 1211, oil cylinder 1212, piston 1213, circulation hydraulic oil inlet 1214, sample upstream
Cushion block 1215, sample downstream cushion block 1217, circulation hydraulic oil outlet 1218, bolt 1219, CO2Hand-hole 1220.Clamper cylinder
Body 1204 and sample upstream cushion block 1215, sample downstream cushion block 1217 are all formed by the PEEK materials processing without nuclear magnetic signal, its
Its part is all stainless steel material；Use screw thread even between clamper stack shell 1204 and fixing stifled 1202 and piston oil-cylinder 1212
Connect, fixing stifled 1202 with bolts with left part end cap 1201；Clamper stack shell 1204 and sample upstream cushion block 1215, sample
Gap between downstream cushion block 1217 is full of the fluorocarbon oil without nuclear magnetic signal, is used for applying confined pressure and heating to sample 1100；Piston
1213 left and right movement can apply xial feed to sample 1100；Displacement transducer 1210 is connected by an elongate rod with piston 1213,
CO can be measured2The displacement of piston 1205 in injection process；It addition, be machined with thin inside fixing stifled 1202 and piston oil-cylinder 1212
Hole, is used for noting CO2, note salt water and note fluorocarbon oil.
3, thermal shrinkable sleeve 1300:
As it is shown in figure 5, thermal shrinkable sleeve 1300 is enclosed within sample 1100 and sample upstream cushion block 1215, sample downstream cushion block 1217 table
Face, makes thermal shrinkable sleeve 1300 pyrocondensation fasten with heat gun, prevents from mixing with the fluid in sample 1100 for the fluorocarbon oil applying confined pressure.
5, NMR 1500:
As shown in Figure 4, NMR 1500 probe is the cylindrical drum that left and right is penetrating, and specimen holder 1200 fills in cylinder
Middle.NMR 1500 is utilized to test relaxation time and the nuclear magnetic signal intensity of hydrogen atom, according to characteristic nmr
With the correlation of porosity, saturation degree, permeability, flow velocity, capillary pressure etc., measure CO2The change of parameters in injection process
Change, utilize nmr imaging technique, visual inspection CO simultaneously2Migration and storage, the deformation failure of cap rock.
Two, load control system 2000:
Load control system 2000 includes: axial compression pump 2100, confined pressure pump 2200, temperature control circulator 2300.
As shown in Figure 4, temperature control circulator 2300 is connected with confined pressure pump 2200, and the former has circulation of fluid (fluorocarbon oil) and convection current concurrently
Body (fluorocarbon oil) carries out the function of temperature control heating, and the latter is then the device applying confined pressure.Confined pressure pump 2200 and axial compression pump 2100 are all
Precision metering pump, can realize constant flow and load and constant voltage loading.
Three, fluid control systems 3000:
Fluid control systems 3000 includes: left part salt water injection pump 3100, right part salt water injection pump 3200, CO2Injection pump
3300, fluid attemperating unit 3400.
As shown in Figure 4, left part salt water injection pump 3100, right part salt water injection pump 3200 and CO2Injection pump 3300 is all essence
Close measuring pump, uses level pressure or constant flow mode to inject fluid, and the temperature of three measuring pumps and whole system of pipe and valve is by fluid
Attemperating unit 3400 regulates, and this device uses the mode of heating water bath.
Four, data acquisition processing system 4000:
Data acquisition processing system 4000 includes: axial compression pressure sensor 4100, confined pressure sensor 4200, left part hydraulic pressure pass
Sensor 4300, right part hydraulic pressure sensor 4400, gas injection pressure sensor 4500, flowmeter 4600, difference gauge 4700, information acquisition card
4800, computer 4900.
As shown in Figure 4, all of sensor all uses the most standardized element, and wherein axial compression sensor 4100 is for essence
Really measure the xial feed suffered by sample, i.e. horizontal structural s tress；Confined pressure sensor 4200 is used for accurately measuring the confined pressure of sample,
I.e. strata pressure；Left part hydraulic pressure sensor 4300 and right part hydraulic pressure sensor 4400 are for accurately measuring the pore pressure perimeter strip of sample
Part；, gas injection pressure sensor 4500 and flowmeter 4600 be for accurately measuring CO2The change of injection process pressure and integrated flow；, letter
Breath capture card 4800 and computer 4900 are used for gathering above-mentioned signal and analyzing and processing data.
Claims (3)
1. a high pressure nuclear magnetic resonance CO2 geological storage model assay systems, by sample visual inspection system (1000), load
Control system (2000), fluid control systems (3000) and data acquisition processing system (4000) composition, it is characterised in that: load
Control system (2000) is connected with sample visual inspection system (1000) by pipeline, and fluid control systems (3000) is by stream
Body flow in pipes is connected with the core holding unit (1200) in sample visual inspection system (1000), data acquisition processing system
(4000) axial compression sensor (4100), confined pressure sensor (4200) in are separately mounted to axial compression in load control system (2000)
On the pipeline that pump (2100), confined pressure pump (2200) are connected with core holding unit (1200), in data acquisition processing system (4000)
Left part hydraulic pressure sensor (4300), right part hydraulic pressure sensor (4400) be connected to left part in fluid control systems (3000)
On the pipeline that salt water injection pump (3100) is connected with core holding unit (1200) with right part salt water injection pump (3200), data acquisition
Gas injection pressure sensor (4500), flowmeter (4600) in processing system (4000) are connected in fluid control systems (3000)
On the pipeline that CO2 injection pump (3300) is connected with core holding unit (1200), the differential pressure in data acquisition processing system (4000)
Meter (4700) two ends are connected to left part salt water injection pump (3100) and right part salt water injection pump (3200) and core holding unit
(1200), on the pipeline being connected, the NMR (1500) in sample visual inspection system (1000) is connected by data wire
Computer (4900) in data acquisition processing system (4000)；
Core holding unit (1200) includes that clamper end cap (1201), fixing stifled (1202), stack shell (1204), displacement transducer prop up
Post (1209), oil cylinder (1212), sample upstream cushion block (1215), clamper end cap (1201) uses bolt with fixing stifled (1202)
(1219) connecting, circulation hydraulic oil outlet (1218) is the perforate that fixing stifled (1202) are internal, fixing stifled (1202) and stack shell
(1204) connecting, stack shell (1204) is connected with oil cylinder (1212), oil cylinder downstream oil filler point (1206), oil cylinder upstream oil filler point
(1207) and circulation hydraulic oil inlet (1214) is the perforate of oil cylinder (1212), oil cylinder (1212) is with cylinder cover (1208) even
Connecing, and sealed by sealing ring (1211), sample upstream water injection hole (1205) is the perforate of sample upstream cushion block (1215), on sample
Trip cushion block (1215) is inserted directly into piston (1213) and connects, and sample downstream water injection hole (1203) is sample downstream cushion block (1217)
Perforate, sample downstream cushion block (1217) is inserted directly into clamper end cap (1201) and connects, and core sample (1100) is placed on sample
Between trip cushion block (1215) and sample downstream cushion block (1217), displacement transducer pillar (1209) is connected with piston (1213), position
Displacement sensor pillar (1209) is connected with pressure lever type displacement transducer (1210), and sample visual inspection system (1000) including:
Sample (1100), core holding unit (1200), thermal shrinkable sleeve (1300), NMR (1500), sample (1100) and rock core folder
Sample upstream cushion block (1215), sample downstream cushion block (1217) center line in holder (1200) unanimously dock, thermal shrinkable sleeve
(1300) sample upstream cushion block (1215), sample (1100) and sample downstream cushion block (1217) outer pyrocondensation fastening, thermal shrinkable sleeve it are enclosed within
(1300), sample (1100) and sample upstream cushion block (1215), sample downstream cushion block (1217) are inserted in specimen holder (1200)
In, specimen holder (1200) is placed horizontally in the probe coil of NMR (1500), and core holding unit (1200) leads to
Cross sample upstream cushion block 1215, sample downstream cushion block 1217 to test (1100) pressure axial compressive force or injected media,
Data acquisition processing system (4000) including: axial compression sensor (4100), confined pressure sensor (4200), left part hydraulic pressure sense
Device (4300), right part hydraulic pressure sensor (4400), gas injection pressure sensor (4500), flowmeter (4600), difference gauge (4700), letter
Breath capture card (4800), computer (4900), axial compression sensor (4100), confined pressure sensor (4200), left part hydraulic pressure sensor
(4300), right part hydraulic pressure sensor (4400), gas injection pressure sensor (4500), flowmeter (4600) and difference gauge (4700) are respectively
Being connected with information acquisition card (4800) by data wire, information acquisition card (4800) is connected with computer (4900) by data wire.
2. a kind of high pressure nuclear magnetic resonance CO2 geological storage model assay systems as described in claim 1, it is characterised in that: institute
The load control system (2000) stated including: axial compression pump (2100), confined pressure pump (2200), temperature control circulator (2300), axial compression pump
(2100) with confined pressure pump (2200) without being directly connected to, axial compression pump (2100) and temperature control circulator (2300) nothing are directly connected to, temperature control
Circulator (2300) is connected by pipeline with confined pressure pump (2200).
3. a kind of high pressure nuclear magnetic resonance CO2 geological storage model assay systems as described in claim 1, it is characterised in that: institute
The fluid control systems (3000) stated including: left part salt water injection pump (3100), right part salt water injection pump (3200), CO2 inject
Pump (3300), fluid attemperating unit (3400), left part salt water injection pump (3100) passes through salt water flow in pipes and core holding unit
(1200) sample downstream water injection hole (1203) connects, and right part salt water injection pump (3200) is pressed from both sides by salt water flow in pipes and rock core
Sample upstream water injection hole (1205) of holder (1200) connects, and CO2 injection pump (3300) is clamped by CO2 flow in pipes and rock core
The CO2 hand-hole (1220) of device (1200) connects, and fluid attemperating unit (3400) is noted with left part salt water respectively by adding hot channel
Enter pump (3100), right part salt water injection pump (3200) and CO2 injection pump (3300) to connect.
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