CN105675449B - The monitoring device and method of exploitation of gas hydrates well sand grains lateral migration rule - Google Patents
The monitoring device and method of exploitation of gas hydrates well sand grains lateral migration rule Download PDFInfo
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- CN105675449B CN105675449B CN201610070178.2A CN201610070178A CN105675449B CN 105675449 B CN105675449 B CN 105675449B CN 201610070178 A CN201610070178 A CN 201610070178A CN 105675449 B CN105675449 B CN 105675449B
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- 239000004576 sand Substances 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000013508 migration Methods 0.000 title claims abstract description 31
- 230000005012 migration Effects 0.000 title claims abstract description 31
- 150000004677 hydrates Chemical class 0.000 title claims abstract description 20
- 238000012806 monitoring device Methods 0.000 title claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 87
- 239000002184 metal Substances 0.000 claims abstract description 87
- 239000007787 solid Substances 0.000 claims abstract description 33
- 238000006073 displacement reaction Methods 0.000 claims abstract description 26
- 238000005259 measurement Methods 0.000 claims abstract description 26
- 238000000926 separation method Methods 0.000 claims abstract description 16
- 238000007781 pre-processing Methods 0.000 claims abstract description 14
- 238000012544 monitoring process Methods 0.000 claims abstract description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 32
- 239000007788 liquid Substances 0.000 claims description 24
- 239000002245 particle Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000011148 porous material Substances 0.000 claims description 15
- 238000002474 experimental method Methods 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 11
- 238000004458 analytical method Methods 0.000 claims description 10
- 238000005070 sampling Methods 0.000 claims description 10
- 230000006837 decompression Effects 0.000 claims description 9
- 150000003839 salts Chemical class 0.000 claims description 6
- 238000004088 simulation Methods 0.000 claims description 6
- NUXZAAJDCYMILL-UHFFFAOYSA-K trichlorolanthanum;hydrate Chemical compound O.Cl[La](Cl)Cl NUXZAAJDCYMILL-UHFFFAOYSA-K 0.000 claims description 6
- 238000004064 recycling Methods 0.000 claims description 4
- 239000012267 brine Substances 0.000 claims description 3
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000011161 development Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000006698 induction Effects 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011549 displacement method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N15/0205—Investigating particle size or size distribution by optical means
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a kind of monitoring devices of exploitation of gas hydrates well sand grains lateral migration rule, including metal tube module, one end of metal tube module is connected with displacement pump and feed flow module in turn by pipeline, gas supply module is also connected with by pipeline in feed flow module, the other end of metal tube module is connected with back pressure module, solid separation module and preprocessing module in turn by pipeline;Metal tube module is also connected with collecting measurement data module, and gas supply module and solid separation module is also respectively connected in collecting measurement data module.The invention also discloses a kind of monitoring methods of exploitation of gas hydrates well sand grains lateral migration rule, this method can be depressured exploitation induction sand migration mechanism study for hydrate and provide measuring technology and experimental data support, the duration is adopted with important reference significance for increasing hydrate runin, promotes the development of hydrate commercialization production technique.
Description
Technical field
The invention belongs to untraditional reservoir Development Engineering technical fields, and in particular to a kind of exploitation of gas hydrates well
The monitoring device of sand grains lateral migration rule, the invention further relates to a kind of exploitation of gas hydrates well sand grains lateral migration rules
Monitoring method.
Background technique
Gas hydrates are considered as 21 century important one of alternative energy source, cause domestic and international government department and section
Grind the extensive concern of institutes.In recent years, domestic and foreign scholars especially pay attention to the research of hydrate exploitation technology, it has been proposed that heat injection
The technologies such as method, voltage drop method, injection chemical-agent technique, displacement method and solid process.Wherein, voltage drop method is by reducing formation pore pressure
To hydrate phase balance pressure, so that solid-state decomposition of hydrate be made to generate methane gas, this method is considered as passing through the most
Help effective production technique, and has applied to the Canadian MacKenzie delta (Mackenzie) and beauty under frozen soil ground environment
Item is adopted in the hydrate runin of Japan's Nankai trough under state Alaska (Alaska) the north sloped region and deep water ground environment
Mesh." Mallik 2002 " and " Mallik 2006-2008 " runin of Canadian MacKenzie delta Mallik permafrost region is adopted
It is because " problem of shaking out " leads to depressurization pump sucking silt particle and damage, and then field test is caused to be forced to stop;Japanese Nankai
In the ocean deepwater stratum of trough, hydrate runin is adopted when carrying out to the 6th day, and recovery well well head pours in a large amount of black suddenly
Silt particle, serious " problem of shaking out " cause depressurization pump to be damaged, and then cause field test with regard to this termination." problem of shaking out " is hydration
Object runin, which is adopted, is forced the main reason for stopping, and seriously limits the runing time of field test.Sea area hydrate formation is usually located
In deficient concretion state and bury shallower, voltage drop method exploitation hydrate will make pore-fluid generate biggish shearing work to formation particles
Firmly, it along with cementing power between decomposition of hydrate weakening sand grains, eventually leads to fine grained silt particle and migrates and assemble in the earth formation,
Sand control installation and pipeline are blocked, depressurization pump is damaged.
In view of the limitation of core-taking technology in situ and field test cost, hydrate exploitation technology is studied with simulating lab test
Based on.Domestic and foreign scholars have developed imitative experimental appliance in multi-room and study for hydrate exploitation technology, pay close attention to hydration
Object decomposes the experiment simulation for producing gas and producing the Parameters variations situation such as regimen condition and temperature, pressure and hydrate concentration, rarely has
It is exploited for hydrate and induces the simulation work of sand migration process spread, matched hydrate exploitation induces the experiment of sand migration
Also there is not been reported for test method, seriously limits and carries out mould to the technical problem (" problem of shaking out ") in hydrate recovery process
Draft experiment work, leading to experimental data can not be directly hydrate exploitation service.
Summary of the invention
The object of the present invention is to provide a kind of monitoring devices of exploitation of gas hydrates well sand grains lateral migration rule.
It is a further object of the present invention to provide a kind of monitoring sides of exploitation of gas hydrates well sand grains lateral migration rule
Method effectively simulating hydrate decompression can exploit the formation pore sand grains migration process induced, pass through sand after test exploitation
The maximum magnitude that the situation of change and sand grains of grain size distribution are migrated for hydrate decompression exploitation sanding mechanism and its is prevented
It controls technical research and support is provided.
First technical solution of the present invention is, a kind of exploitation of gas hydrates well sand grains lateral migration rule
One end of monitoring device, including metal tube module, metal tube module is connected with displacement pump and feed flow module in turn by pipeline, supplies
Gas supply module is also connected with by pipeline in liquid module, the other end of metal tube module is connected with back pressure mould in turn by pipeline
Block, solid separation module and preprocessing module;Metal tube module is also connected with collecting measurement data module, collecting measurement data mould
Gas supply module and solid separation module is also respectively connected in block;Metal tube module, gas supply module, back pressure module, is consolidated feed flow module
Body separation module, preprocessing module and DATA REASONING acquisition module are all set in temperature control module.
Further, metal tube module includes four metal tubes being connected in turn, and the both ends of metal tube pass through respectively leads
Line is connected with displacement pump and back pressure module;Sand control screens are provided on metal tube and with back pressure module connection, are set on metal tube
It is equipped with sampling hole;Collecting measurement data module is provided on metal tube.
Further, back pressure module is back pressure valve.
Further, feed flow module includes passing through the sequentially connected saturation vessel of pipeline, high-pressure filling pump and the first liquid
Container;Saturation vessel is connected by pipeline with displacement pump;Gas supply module include the gas booster pump that is connected by pipeline and
Methane gas cylinder, gas booster pump are connected by pipeline with saturation vessel.
Further, solid separation module is connected to solid separator and second liquid container including being connected by pipeline, Gu
Body separator is connected separately with back pressure valve and preprocessing module.
Further, preprocessing module includes vibrating screen, laser particle analyzer and electronic balance;Laser particle analyzer and electronics day
Flat to be connected, laser particle analyzer is connected with solid separator.
Further, collecting measurement data module includes pressure sensor, first gas flowmeter, second gas flow
Meter, fluid flowmeter, capture card and industrial personal computer, capture card pass through conducting wire respectively and are connected with industrial personal computer, pressure sensor, the first gas
Flowmeter body, second gas flowmeter and fluid flowmeter;Pressure sensor is set on metal tube;Gas booster pump and saturation
First gas flowmeter is provided between container;Second gas flowmeter is connected on solid separator;Solid separator and
Fluid flowmeter is provided between two liquid containers.
Second technical solution of the present invention is, a kind of exploitation of gas hydrates well sand grains lateral migration rule
Monitoring method, using the monitoring device of above-mentioned exploitation of gas hydrates well sand grains lateral migration rule, comprising the following steps:
1) sand sample gradation measures: the grading curve of measurement experiment sand sample, the initial value as sand migration analysis;
2) metal tube back-up sand:
2.1) 4 metal tubes are cleaned, and it is put into constant temperature oven at least 12 hours dry, temperature with experiment sand sample simultaneously
Degree control is 105 DEG C, takes out simultaneously cooled to room temperature later;
2.2) one end and sampling hole of 4 metal tubes are sealed, it is then vertical to place metal tube, using electronic balance weighing sand
Sand sample is packed into 4 metal tubes by sample quality, and control porosity is setting value, later the other end of sealed metal tube;
2.3) metal tube of 4 back-up sands is connected by flange, and connected in experimental system;
3) experimental system is hunted leak: connecting line, and into experimental system, water filling makes pore pressure not less than 10MPa, stands 12
Hour, experimental system airtight performance is good if pore pressure is stablized, and otherwise searches leakage point and hunts leak again;
4) lanthanum chloride hydrate:
4.1) methane gas, the hole water volume of record displacement discharge are injected to metal tube;
4.2) temperature is reduced with synthesized hydrate;
4.3) when pore pressure no longer reduces, the lanthanum chloride hydrate stage is completed;
5) it is depressured displacement:
5.1) salt water of over-saturation methane gas is prepared;
5.2) back pressure valve is adjusted to pressure is set, which is less than hydrate phase balance pressure, into metal tube
The salt water of over-saturation methane gas is pumped, realizes the brine recycling between metal tube and saturation vessel, hydrate decompression is carried out and opens
Adopt the simulation for inducing sand migration process, the situation of change of real-time measurement metal tube inner pore pressure;
5.3) sand sample that fixed time intervals come out displacement measures analysis, including quality and partial size;
5.4) after hydrate decomposes completely, the decompression displacement stage is completed;
6) experiment terminates: slow pressure release, takes out part sand sample from metal tube aperture using sampling instrument, analyzes sand grains grade
The Axial changes situation of metal tube is fitted over, instrument removal simultaneously cleans arrangement.
The beneficial effects of the present invention are: easily and effectively measurement hydrate decompression exploitation induces sand migration process sand grains
The situation of change of gradation and the sand controlling result for evaluating different size sand control screens.This method can induce for hydrate decompression exploitation
Sand migration mechanism study provides measuring technology and experimental data is supported, adopts the duration with weight for increasing hydrate runin
The reference significance wanted promotes the development of hydrate commercialization production technique.
Detailed description of the invention
Fig. 1 is the structural block diagram of the monitoring device of exploitation of gas hydrates well sand grains lateral migration rule of the present invention;
Fig. 2 is the structural schematic diagram of the monitoring device of exploitation of gas hydrates well sand grains lateral migration rule of the present invention;
Fig. 3 is the work flow diagram of the monitoring method of exploitation of gas hydrates well sand grains lateral migration rule of the present invention.
In figure, 1. metal tubes;2. methane gas cylinder;3. gas booster pump;4. first gas flowmeter;5. saturation vessel;6.
First liquid container;7. high-pressure filling pump;8. displacement pumps;9. pressure sensor;10. back pressure valve;11. solid separator;12.
Laser particle analyzer;13. electronic balance;14. second gas flowmeter;15. fluid flowmeter;16. second liquid container;17. vibration
Dynamic sieve;18. data collecting card;19. industrial personal computer;20. sand control screens;21. walk-in type freezer;22. metal tube module;23. feed flow mould
Block;24. supplying module;25. back pressure module;26. solid separation module;27. preprocessing module;28. collecting measurement data module;
29. temperature control module.
Specific embodiment
The present invention is described in detail With reference to embodiment.
The present invention provides a kind of monitoring device of exploitation of gas hydrates well sand grains lateral migration rule, as shown in Figure 1,
Including metal tube module 22, one end of metal tube module 22 is connected with displacement pump 8 and feed flow module 23, feed flow in turn by pipeline
Gas supply module 24 is also connected with by pipeline in module 23, the other end of metal tube module 22 is connected with back pressure in turn by pipeline
Module 25, solid separation module 26 and preprocessing module 27;Metal tube module 22 is also connected with collecting measurement data module 28, number
Gas supply module 24 and solid separation module 26 is also respectively connected according to measurement acquisition module 28;Metal tube module 22, feed flow module
23, module 24, back pressure module 25, solid separation module 26, preprocessing module 27 and DATA REASONING acquisition module 28 is supplied to be all provided with
It is placed in temperature control module 29.
As shown in Fig. 2, metal tube module 22 includes four metal tubes 1 being connected in turn, the both ends of metal tube 1 lead to respectively
It crosses conducting wire and is connected with displacement pump 8 and back pressure module 25, wherein the main function of displacement pump 8 is exactly will saturation from saturation vessel 5
Water is pumped into metal tube 1;Sand control screens 20 are provided on metal tube 1 and with 25 connection of back pressure module, are arranged on metal tube 1
There is sampling hole, the position of sampling hole and the position of pressure sensor 9 correspond;Collecting measurement data is provided on metal tube 1
Module 28.
Back pressure module 25 is back pressure valve 10.In order to guarantee in metal tube 1 in a certain constant pressure drop item in experimentation
Body simulation test is carried out under part, therefore the pressure at liquid outlet end directly cannot be vented to form atmospheric pressure, it is inconvenient permanent in this way
The foundation of level pressure difference, therefore the main function of back-pressure valve 10 is that the pressure difference of 20 front and back of sieve is maintained to be in a certain steady state value.
Feed flow module 23 includes passing through the sequentially connected saturation vessel 5 of pipeline, high-pressure filling pump 7 and the first liquid container 6,
Wherein, the main function of saturation vessel 5 be by methane gas cylinder 2 and the first liquid container 6 gas and liquid be sufficiently mixed, shape
At the saturated water of saturated gas;Correspondingly, the effect of high-pressure filling pump 7 is to be pumped into the light water in the first liquid container 6
In the middle of saturation vessel 5;Saturation vessel 5 is connected by pipeline with displacement pump 8;Supplying module 24 includes being connected by pipeline
Gas booster pump 3 and methane gas cylinder 2, gas booster pump 3 be connected with saturation vessel 5 by pipeline.
Solid separation module 26 includes being connected to be connected to solid separator 11 and second liquid container 16 by pipeline, solid point
Back pressure valve 10 and preprocessing module 27 are connected separately with from device 11, wherein the partial size that test the sieve by sieve 20, it must
The fluid in sand, liquid mixture must be removed first;In addition, due in entire circulation process liquid be eventually returned to the second liquid
Body container 16, recovery experiment water needs to remove sand or like solid before, therefore the main function of solid separator 11
It is: by the solid sedimentation separation in mixture, so that the recycling for next step sand grain diameter measurement and water is prepared.
Preprocessing module 27 include vibrating screen 17, laser particle analyzer 12 and electronic balance 13, the effect of vibrating screen 17 and swash
As the effect actually of light particle size analyzer 12, the particle diameter distribution for being provided to measurement output sand is regular, but vibrating screen
The sand amount needed is relatively more, and needs sand dry, thus actually vibrating screen with the component in Fig. 2 without actually connecting
It connects, but in Fig. 2, needs to collect the sand of output after being terminated with the measurement of electronic balance 13 weight, be vibrated after complete
Sieve 17 screen analysises;In addition, the most important function of vibrating screen is " sand sample with grade measure ", before the experiments, needs to know and be loaded into gold
Belong to the particle size distribution law of the sand in pipe 1, it is therefore desirable to the sand for meeting certain grain size distribution range is precipitated with Vibration Screen,
Then it is loaded;Laser particle analyzer 12 is connected with electronic balance 13, and laser particle analyzer 12 is connected with solid separator 11;
The main function of laser particle size particle size analyzer is to carry out grain size analysis to the sand of output, therefore laser particle analyzer is separated with solid
What device 11 was connected.
Collecting measurement data module 28 includes pressure sensor 9, first gas flowmeter 4, second gas flowmeter 14, liquid
Flowmeter body 15, capture card 18 and industrial personal computer 19, capture card 18 respectively by conducting wire be connected with industrial personal computer 19, pressure sensor 9,
First gas flowmeter 4, second gas flowmeter 14 and fluid flowmeter 15;Pressure sensor 9 is set on metal tube 1;Gas
First gas flowmeter 4 is provided between body booster pump 3 and saturation vessel 5;Second gas stream is connected on solid separator 11
Meter 14;Fluid flowmeter 15 is provided between solid separator 11 and second liquid container 16.
The present invention provides a kind of monitoring method of exploitation of gas hydrates well sand grains lateral migration rule, as shown in figure 3,
Using the monitoring device of above-mentioned exploitation of gas hydrates well sand grains lateral migration rule, comprising the following steps:
1) sand sample gradation measures: the grading curve of measurement experiment sand sample, the initial value as sand migration analysis;
2) metal tube back-up sand:
2.1) 4 metal tubes 1 are cleaned, and it is put into drying at least 12 hours in constant temperature oven with experiment sand sample simultaneously,
Temperature control is 105 DEG C, takes out simultaneously cooled to room temperature later;
2.2) one end and sampling hole of 4 metal tubes 1 are sealed, it is then vertical to place metal tube 1, claimed using electronic balance 13
Sand sample is packed into 4 metal tubes 1 by heavy sand sample quality, and control porosity is setting value, later the other end of sealed metal tube 1;
2.3) metal tube 1 of 4 back-up sands is connected by flange, and the entrance of metal tube 1 and displacement is pumped 8
The metal pipe line of outlet end connects, and the outlet end of metal tube 2 is connected with the portal metal pipeline of back-pressure valve 10;
3) experimental system is hunted leak: connecting line, into entire circulation line, water filling makes pore pressure not less than 10MPa, quiet
It sets 12 hours, experimental system airtight performance is good if pore pressure is stablized, and otherwise searches leakage point and hunts leak again;
4) lanthanum chloride hydrate:
4.1) methane gas, the hole water volume of record displacement discharge are injected to metal tube 1;Second liquid container 16 is containing quarter
Degree, therefore the interstitial water total volume excluded in gas injection process can be measured, furthermore it is also possible to be driven by the measurement of fluid flowmeter 15
For the flow of liquid in the process, the pore water total volume excluded during note methane then can be obtained by multiplied by the displacement time.
4.2) temperature is reduced with synthesized hydrate;
4.3) when pore pressure no longer reduces, the lanthanum chloride hydrate stage is completed;
5) it is depressured displacement:
5.1) salt water of over-saturation methane gas is prepared;
5.2) back pressure valve 10 is adjusted to setting pressure, which is less than hydrate phase balance pressure, to metal tube 1
The salt water of interior pumping over-saturation methane gas, realizes the brine recycling between metal tube 1 and saturation vessel 5, carries out hydrate drop
Press off the simulation adopted and induce sand migration process, the situation of change of 1 inner pore pressure of real-time measurement metal tube;
5.3) sand sample that fixed time intervals come out displacement measures analysis, including quality and partial size;Wherein, partial size
Analysis is realized by laser particle analyzer 12 and vibrating screen 20;Quality is measured by electronic balance 13;
5.4) after hydrate decomposes completely, the decompression displacement stage is completed;
6) experiment terminates: slow pressure release, takes out part sand sample from metal tube aperture using sampling instrument, analyzes sand grains grade
The Axial changes situation of metal tube is fitted over, instrument removal simultaneously cleans arrangement.
Embodiments of the present invention are explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned embodiment party
Formula can also make many variations to it within the knowledge of one of ordinary skill in the art.
Claims (7)
1. a kind of monitoring method of exploitation of gas hydrates well sand grains lateral migration rule, which is characterized in that
Using a kind of monitoring device of exploitation of gas hydrates well sand grains lateral migration rule, which includes metal tube module
(22), one end of the metal tube module (22) is connected with displacement pump (8) and feed flow module (23), the confession in turn by pipeline
Gas supply module (24) is also connected with by pipeline in liquid module (23), the other end of the metal tube module (22) by pipeline according to
It is secondary to be connected with back pressure module (25), solid separation module (26) and preprocessing module (27);The metal tube module (22) also connects
It is connected to collecting measurement data module (28), the collecting measurement data module (28) is also respectively connected gas supply module (24) and consolidates
Body separation module (26);The metal tube module (22), feed flow module (23), gas supply module (24), back pressure module (25), solid
Separation module (26), preprocessing module (27) and DATA REASONING acquisition module (28) are all set in temperature control module (29);
The following steps are included:
1) sand sample gradation measures: the grading curve of measurement experiment sand sample, the initial value as sand migration analysis;
2) metal tube back-up sand:
2.1) 4 metal tubes (1) are cleaned, and it is put into constant temperature oven at least 12 hours dry, temperature with experiment sand sample simultaneously
Degree control is 105 DEG C, takes out simultaneously cooled to room temperature later;
2.2) one end and sampling hole of 4 metal tubes (1) are sealed, it is then vertical to place metal tube (1), using electronic balance (13)
It weighs sand sample quality, sand sample is packed into 4 metal tubes (1), control porosity is setting value, later sealed metal tube (1)
The other end;
2.3) metal tube (1) of 4 back-up sands is connected by flange, and connected in experimental system;
3) experimental system is hunted leak: connecting line, and into experimental system, water filling makes pore pressure not less than 10MPa, stands 12 hours,
Experimental system airtight performance is good if pore pressure is stablized, and otherwise searches leakage point and hunts leak again;
4) lanthanum chloride hydrate:
4.1) methane gas, the hole water volume of record displacement discharge are injected to metal tube (1);
4.2) temperature is reduced with synthesized hydrate;
4.3) when pore pressure no longer reduces, the lanthanum chloride hydrate stage is completed;
5) it is depressured displacement:
5.1) salt water of over-saturation methane gas is prepared;
5.2) back pressure valve (10) are adjusted to setting pressure, which is less than hydrate phase balance pressure, to metal tube (1)
The salt water of interior pumping over-saturation methane gas, realizes the brine recycling between metal tube (1) and saturation vessel (5), is hydrated
Object decompression exploitation induces the simulation of sand migration process, the situation of change of real-time measurement metal tube (1) inner pore pressure;
5.3) sand sample that fixed time intervals come out displacement measures analysis, including quality and partial size;
5.4) after hydrate decomposes completely, the decompression displacement stage is completed;
6) experiment terminates: slow pressure release, part sand sample is taken out from metal tube aperture using sampling instrument, analysis sand-grading exists
The Axial changes situation of metal tube, instrument removal simultaneously clean arrangement.
2. being connected in turn the method according to claim 1, wherein the metal tube module (22) includes four
Metal tube (1), the both ends of the metal tube (1) pass through conducting wire respectively and are connected with displacement pump (8) and back pressure module (25);It is described
It is provided with sand control screens (20) on metal tube (1) and with back pressure module (25) connection, is provided with sampling on the metal tube (1)
Hole;Collecting measurement data module (28) are provided on the metal tube (1).
3. according to the method described in claim 2, it is characterized in that, the back pressure module (25) is back pressure valve (10).
4. according to the method described in claim 3, it is characterized in that, the feed flow module (23) includes being sequentially connected by pipeline
Saturation vessel (5), high-pressure filling pump (7) and the first liquid container (6);The saturation vessel (5) is pumped by pipeline and displacement
(8) it is connected;Gas supply module (24) includes the gas booster pump (3) being connected by pipeline and methane gas cylinder (2), described
Gas booster pump (3) is connected by pipeline with saturation vessel (5).
5. according to the method described in claim 4, it is characterized in that, the solid separation module (26) includes being connected by pipeline
It is connected to solid separator (11) and second liquid container (16), the solid separator (11) is connected separately with back pressure valve (10)
With preprocessing module (27).
6. according to the method described in claim 5, it is characterized in that, the preprocessing module (27) includes vibrating screen (17), swashs
Light particle size analyzer (12) and electronic balance (13);The laser particle analyzer (12) is connected with electronic balance (13), the laser grain
Degree instrument (12) is connected with solid separator (11).
7. according to the method described in claim 6, it is characterized in that, the collecting measurement data module (28) includes pressure sensing
Device (9), first gas flowmeter (4), second gas flowmeter (14), fluid flowmeter (15), capture card (18) and industrial personal computer
(19), the capture card (18) is connected with industrial personal computer (19), pressure sensor (9), first gas flowmeter by conducting wire respectively
(4), second gas flowmeter (14) and fluid flowmeter (15);The pressure sensor (9) is set on metal tube (1);Institute
It states and is provided with first gas flowmeter (4) between gas booster pump (3) and saturation vessel (5);On the solid separator (11)
It is connected with second gas flowmeter (14);Liquid flow is provided between the solid separator (11) and second liquid container (16)
Meter (15).
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CN201610070178.2A CN105675449B (en) | 2016-02-01 | 2016-02-01 | The monitoring device and method of exploitation of gas hydrates well sand grains lateral migration rule |
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CN105675449B true CN105675449B (en) | 2019-01-25 |
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