CN110396396A - A kind of includes the drying agent nanoscale ultramicro powder production method that ionic type metal carbide is applied to compact reservoir - Google Patents
A kind of includes the drying agent nanoscale ultramicro powder production method that ionic type metal carbide is applied to compact reservoir Download PDFInfo
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- CN110396396A CN110396396A CN201910721766.1A CN201910721766A CN110396396A CN 110396396 A CN110396396 A CN 110396396A CN 201910721766 A CN201910721766 A CN 201910721766A CN 110396396 A CN110396396 A CN 110396396A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
Abstract
It is disclosed by the invention it is a kind of include ionic type metal carbide be applied to compact reservoir drying agent nanoscale ultramicro powder production method, including (1) will dehydrated alcohol, ionic type metal carbide merging high-temperature high-pressure reaction kettle in；(2) carbon dioxide is injected from the injection end of reaction kettle, the temperature of reaction kettle, pressure is reached and/or more than CO 2 supercritical state；(3) material for being dissolved in supercritical carbon dioxide is sprayed by ultrasonic wave atomizing nozzle, while nano-scale particle is precipitated in pressure decline.The advantage of the invention is that, the nanoscale drying agent particle that the present invention makes considers the influence of the micropore structure of water lock tight gas reservoir, solves the difficulty of microscopic void drying agent injection, injectability of the drying agent in fine and close Water-bearing Gas Reservoir based on ionic type metal carbide is improved, also the preparation for ionic type metal carbide nano-grade ultramicro powder provides a kind of new method.
Description
Technical field
The invention belongs to nanoscale ultramicro powder manufacture technology fields, and specially one kind includes ionic type metal carbide
Drying agent nanoscale ultramicro powder production method applied to compact reservoir.
Background technique
China's tight gas resource extent is huge, and geological resources are about 22.88 × 1012m3, it is that China's natural gas persistently increases
Long mainstay by the reliever relay for becoming China's conventional gas and oil resource and ensures one of the leading role that China's petroleum resources are supplied.
However, tight gas reservoir reservoir usually original water saturation with higher and easily generation water blocking damage, so as to cause gas phase
Permeability is lower, and cost of winning is larger.By experiment test discovery, the permeability of the dry rock core of tight gas reservoir reservoir is original aqueous
Therefore if can inject certain drying agent chemical reaction life occurs with water flooding for 10 times or more of rock core in tight gas reservoir reservoir
At gas and heat to consume water flooding, then reservoir water saturation can be greatly lowered, release compact reservoir water lock wound
Evil, to improve gas flow ability.Currently, a kind of Chinese patent " reduction compact reservoir of Publication No. CN107459981A
The drying agent of water-blocking effect " one kind is proposed by Al4C3And C2The desiccation host agent of HNa composition carries out desiccation to compact reservoir.So
And tight gas reservoir reservoir pore throat is smaller, reservoir space main body is nanoscale pore throat system, and pore-size distribution is 40~700nm, because
This, it is necessary to is using the minimum Al of partial size4C3And C2HNa nanoscale microparticle can be just injected into compact reservoir hole, and in mesh
Under precondition, ionic type metal carbide desiccation host agent Al4C3Granular size in the micron-scale, partial size is excessive effectively to be infused
Enter the microscopic void of compact reservoir, and existing technology can not also prepare a nanometer drying agent particle, so research preparation nanometer
The method of grade desiccation particle just seems particularly necessary.
Summary of the invention
In order to solve in the prior art as the ionic type metal carbide of the drying agent host agent of tight gas reservoir reservoir and dry
Catalyst particles size remains in the micron order stage, can not be efficiently injected into the defect of the microscopic void of compact reservoir, and the present invention mentions
It has supplied a kind of to include drying agent nanoscale ultramicro powder production method of the ionic type metal carbide applied to compact reservoir, it is real
Existing purpose is that by this method, available nanoscale ionic type metal carbide, also available nanoscale is dry
Agent is solved the problems, such as not injecting for the microscopic void drying agent of compact reservoir at present, be improved with ionic carbide
For injectability of the drying agent in fine and close Water-bearing Gas Reservoir of host agent, ionic type metal carbide broader practice model has been expanded
It encloses.
To achieve the goals above, one kind provided by the invention includes that ionic type metal carbide is applied to compact reservoir
Drying agent nanoscale ultramicro powder production method, include the following steps:
It (1) will be in dehydrated alcohol, ionic type metal carbide merging high-temperature high-pressure reaction kettle；
(2) by the reaction kettle it is closed after, from the injection end of reaction kettle inject carbon dioxide, to reaction kettle temperature, pressure
When power reaches and/or is more than CO 2 supercritical state, reaction kettle injection end is closed；
(3) outlet end that reaction kettle is connected to ultrasonic wave atomizing nozzle is opened, the material of supercritical carbon dioxide is dissolved in
It is sprayed by ultrasonic wave atomizing nozzle, while nano-scale particle is precipitated in pressure decline, nano-scale particle passes through gravitational differentiation
It is deposited on the collecting board of lower section and is collected.
Further, dehydrated alcohol in the step (1), ionic type metal carbide mass ratio be 1:30.
It further, further include the desiccation agent aid being used cooperatively with ionic type metal carbide, institute in the step (1)
The molar ratio for stating desiccation agent aid and ionic type metal carbide is 1-2:1-2.
Further, the ionic type metal carbide is aluminium carbide, calcium carbide, lithium carbide, sodium acetylide etc..
Further, desiccation agent aid is sodium ethoxide in the step (1).
Further, the concrete operation method of the step (2) is to inject carbon dioxide from reaction kettle inlet, and use
Booster pump is pressurized carbon dioxide, so that the pressure carbon dioxide of injection is more than the critical pressure 7MPa of carbon dioxide, and increase
Stop injection carbon dioxide after to 15MPa, closes the injection end of reaction kettle；Reaction kettle is opened while injecting carbon dioxide
Heating device, temperature are adjusted to the critical-temperature higher than carbon dioxide, and institute's temperature regulating is 60 DEG C, reach setting to pressure and temp
It is required that the balance rotor stirring that starting is placed in reaction kettle, makes material preferably dissolve each other with supercritical carbon dioxide.
Further, step (3) concrete operation method are as follows: 90 DEG C are risen to temperature, opens reaction kettle outlet end, this
When ultrasonic wave atomizing nozzle spray the nano-scale particle that is precipitated from supercritical carbon dioxide, be deposited on powder collection plate, when
Reacting kettle inner pressure closes outlet end after being down to supercritical carbon dioxide critical pressure 7MPa, stops injection output.
By adopting the above technical scheme, beneficial effect includes: the nanoscale drying agent particle consideration that the present invention makes to the present invention
The influence of the micropore structure of water lock tight gas reservoir, solves the difficulty of microscopic void drying agent injection, improve with from
Injectability of the drying agent in fine and close Water-bearing Gas Reservoir based on subtype metal carbides is also ionic type metal carbide nanometer
The preparation of grade ultramicro powder provides a kind of new method.
Detailed description of the invention
Fig. 1 is equipment schematic diagram employed in the method for the present invention；
Fig. 2 is to be scanned electronic microscopic characterization test chart to the finally obtained nano particle of the present invention；
Fig. 3 is to obtained nanoparticles of the invention through transmission electron microscope characterization test figure；
Fig. 4 is obtained nanoparticles of the invention through EDS energy spectrum analysis figure；
Fig. 5 is obtained nanoparticles of the invention through XRD characterization test chart.
Specific embodiment
The present invention is further illustrated with reference to embodiments.
Embodiment one: it is provided by the invention it is a kind of include ionic type metal carbide be applied to compact reservoir drying agent
Nanoscale ultramicro powder production method, ionic type metal carbide (such as aluminium carbide), includes the following steps:
It (1) will be in dehydrated alcohol, aluminium carbide merging high-temperature high-pressure reaction kettle；
(2) by the reaction kettle it is closed after, from the injection end of reaction kettle inject carbon dioxide, to reaction kettle temperature, pressure
When power reaches and/or is more than CO 2 supercritical state, reaction kettle injection end is closed；
(3) outlet end that reaction kettle is connected to ultrasonic wave atomizing nozzle is opened, the carbonization of supercritical carbon dioxide is dissolved in
Aluminium is sprayed by ultrasonic wave atomizing nozzle, while nanoscale carbonization alumina particles are precipitated in pressure decline, and nanoscale carbonization alumina particles are logical
Cross gravitational differentiation be deposited in lower section collecting board on be collected.
Further, in the step (1) dehydrated alcohol, ionic type metal carbide mass ratio 1:30.
Finally obtained the present embodiment is nanoscale aluminium carbide, which passes through frequently as the desiccation for being applied to compact reservoir
The principal component of agent, it is possible to can since principal component is nanoscale by the ingredient and other auxiliary agents injection compact reservoir
To be injected into the microscopic void of compact reservoir well, so that chemical reaction, which occurs, with water flooding generates gas and heat to disappear
Water flooding is consumed, then reservoir water saturation can be greatly lowered, release compact reservoir water blocking damage, to improve gas flow
Ability promotes gas phase permeability, reduces the cost to extract natural gas.
Embodiment two: provided by the invention includes the drying agent nanometer that ionic type metal carbide is applied to compact reservoir
Grade ultramicro powder production method, such as ionic type metal carbonization inaction aluminium carbide, desiccation agent aid are sodium ethoxide, aluminium carbide and second
The molar ratio of sodium alkoxide is 1:2, and this method comprises the following steps:
(1) dehydrated alcohol, aluminium carbide and sodium ethoxide are placed in high-temperature high-pressure reaction kettle, certainly, the aluminium carbide of use can
Think micron-sized；
(2) by the reaction kettle it is closed after, from the injection end of reaction kettle inject carbon dioxide, to reaction kettle temperature, pressure
When power reaches and/or is more than CO 2 supercritical state, reaction kettle injection end is closed；
(3) outlet end that reaction kettle is connected to ultrasonic wave atomizing nozzle is opened, the material of supercritical carbon dioxide is dissolved in
It is sprayed by ultrasonic wave atomizing nozzle, while nano-scale particle is precipitated in pressure decline, nano-scale particle passes through gravitational differentiation
It is deposited on the collecting board of lower section and is collected.
Specifically, in the step (1) dehydrated alcohol, ionic type metal carbide mass ratio 1:30.
Specifically, the concrete operation method of the step (2) is carbon dioxide to be injected from reaction kettle inlet, and use increasing
Press pump is pressurized carbon dioxide, so that the pressure carbon dioxide of injection is more than the critical pressure 7MPa of carbon dioxide, and increase to
Stop injection carbon dioxide after 15MPa, closes the injection end of reaction kettle；Adding for reaction kettle is opened while injecting carbon dioxide
Thermal, temperature are adjusted to more than CO2Critical-temperature (such as 60 DEG C), reach sets requirement to pressure and temp, starting is placed on anti-
It answers the balance rotor in kettle to stir, ionic type metal carbide is made preferably to dissolve each other in supercritical carbon dioxide.
Specifically, step (3) concrete operation method are as follows: open reaction kettle outlet end, outlet end passes through high pressure resistant pipe
The ultrasonic nozzle moment of line connection ejects the ultra micro being precipitated in pressure reduction after supercritical carbon dioxide dissolution aluminium carbide
Particle, and so that extra ethyl alcohol is obtained flash evapn in the environment by being in high temperature oven, 90 DEG C are risen to oven temperature, this
When ultrasonic wave atomizing nozzle spray the particle that is precipitated from supercritical carbon dioxide, be deposited on powder collection plate, work as reaction kettle
Interior pressure closes outlet end after being down to supercritical carbon dioxide critical pressure 7MPa, stops injection output.
The present embodiment is that principal component aluminium carbide is obtained nanoscale drying agent through the method for the present invention together with auxiliary agent, is passed through
Electron microscope, transmission electron microscope, EDS energy spectrum analysis and XRD characterization test are scanned to the particle of collection, this
Equipment employed in inventive method is shown as shown in Figure 1, being scanned electronic to the finally obtained nano particle of the present invention
The figure of micro mirror characterization test is as shown in Fig. 2, by obtained nanoparticles of the invention through transmission electron microscope characterization test
Figure as shown in figure 3, figure by the obtained nanoparticles of the present invention through EDS energy spectrum analysis as shown in figure 4, the present invention is obtained
Figure that nanoparticles are tested through XRD characterization as shown in figure 5, determine obtain ultramicro powder is nanoscale drying agent, substance group
As aluminium, carbon, sodium, oxygen element, main component Al4C3。
Embodiment three: provided by the invention includes the drying agent nanometer that ionic type metal carbide is applied to compact reservoir
Grade ultramicro powder production method, such as ionic type metal carbonization inaction calcium carbide, desiccation agent aid are sodium ethoxide, calcium carbide and second
The molar ratio of sodium alkoxide is 1:1, and this method comprises the following steps:
(1) dehydrated alcohol, calcium carbide and sodium ethoxide are placed in high-temperature high-pressure reaction kettle, certainly, the calcium carbide of use can
Think micron-sized；
(2) by the reaction kettle it is closed after, from the injection end of reaction kettle inject carbon dioxide, to reaction kettle temperature, pressure
When power reaches and/or is more than CO 2 supercritical state, reaction kettle injection end is closed；
(3) outlet end that reaction kettle is connected to ultrasonic wave atomizing nozzle is opened, the material of supercritical carbon dioxide is dissolved in
It is sprayed by ultrasonic wave atomizing nozzle, while nano-scale particle is precipitated in pressure decline, nano-scale particle passes through gravitational differentiation
It is deposited on the collecting board of lower section and is collected.
Specifically, in the step (1) dehydrated alcohol, ionic type metal carbide mass ratio 1:30.
Specifically, the concrete operation method of the step (2) is carbon dioxide to be injected from reaction kettle inlet, and use increasing
Press pump is pressurized carbon dioxide, so that the pressure carbon dioxide of injection is more than the critical pressure 7MPa of carbon dioxide, and increase to
Stop injection carbon dioxide after 15MPa, closes the injection end of reaction kettle；Adding for reaction kettle is opened while injecting carbon dioxide
Thermal, temperature are adjusted to more than CO2Critical-temperature (such as 60 DEG C), reach sets requirement to pressure and temp, starting is placed on anti-
It answers the balance rotor in kettle to stir, ionic type metal carbide is made preferably to dissolve each other in supercritical carbon dioxide.
Specifically, step (3) concrete operation method are as follows: open reaction kettle outlet end, outlet end passes through high pressure resistant pipe
The ultrasonic nozzle moment of line connection ejects the ultra micro being precipitated in pressure reduction after supercritical carbon dioxide dissolution aluminium carbide
Particle, and so that extra ethyl alcohol is obtained flash evapn in the environment by being in high temperature oven, 90 DEG C are risen to oven temperature, this
When ultrasonic wave atomizing nozzle spray the particle that is precipitated from supercritical carbon dioxide, be deposited on powder collection plate, work as reaction kettle
Interior pressure closes outlet end after being down to supercritical carbon dioxide critical pressure 7MPa, stops injection output.
Example IV: provided by the invention includes the drying agent nanometer that ionic type metal carbide is applied to compact reservoir
Grade ultramicro powder production method, such as ionic type metal carbide is lithium carbide, desiccation agent aid is sodium ethoxide, lithium carbide and second
The molar ratio of sodium alkoxide is 2:1, and this method comprises the following steps:
(1) dehydrated alcohol, lithium carbide and sodium ethoxide are placed in high-temperature high-pressure reaction kettle, certainly, the lithium carbide of use can
Think micron-sized；
(2) by the reaction kettle it is closed after, from the injection end of reaction kettle inject carbon dioxide, to reaction kettle temperature, pressure
When power reaches and/or is more than CO 2 supercritical state, reaction kettle injection end is closed；
(3) outlet end that reaction kettle is connected to ultrasonic wave atomizing nozzle is opened, the material of supercritical carbon dioxide is dissolved in
It is sprayed by ultrasonic wave atomizing nozzle, while nano-scale particle is precipitated in pressure decline, nano-scale particle passes through gravitational differentiation
It is deposited on the collecting board of lower section and is collected.
Specifically, in the step (1) dehydrated alcohol, ionic type metal carbide mass ratio 1:30.
Specifically, the concrete operation method of the step (2) is carbon dioxide to be injected from reaction kettle inlet, and use increasing
Press pump is pressurized carbon dioxide, so that the pressure carbon dioxide of injection is more than the critical pressure 7MPa of carbon dioxide, and increase to
Stop injection carbon dioxide after 15MPa, closes the injection end of reaction kettle；Adding for reaction kettle is opened while injecting carbon dioxide
Thermal, temperature are adjusted to more than CO2Critical-temperature (such as 60 DEG C), reach sets requirement to pressure and temp, starting is placed on anti-
It answers the balance rotor in kettle to stir, ionic type metal carbide is made preferably to dissolve each other in supercritical carbon dioxide.
Specifically, step (3) concrete operation method are as follows: open reaction kettle outlet end, outlet end passes through high pressure resistant pipe
The ultrasonic nozzle moment of line connection ejects the ultra micro being precipitated in pressure reduction after supercritical carbon dioxide dissolution aluminium carbide
Particle, and so that extra ethyl alcohol is obtained flash evapn in the environment by being in high temperature oven, 90 DEG C are risen to oven temperature, this
When ultrasonic wave atomizing nozzle spray the particle that is precipitated from supercritical carbon dioxide, be deposited on powder collection plate, work as reaction kettle
Interior pressure closes outlet end after being down to supercritical carbon dioxide critical pressure 7MPa, stops injection output.
Embodiment five: provided by the invention includes the drying agent nanometer that ionic type metal carbide is applied to compact reservoir
Grade ultramicro powder production method, such as ionic type metal carbonization inaction sodium acetylide, desiccation agent aid are sodium ethoxide, sodium acetylide and second
The molar ratio of sodium alkoxide is 1:1, and this method comprises the following steps:
(1) dehydrated alcohol, sodium acetylide and sodium ethoxide are placed in high-temperature high-pressure reaction kettle, certainly, the sodium acetylide of use can
Think micron-sized；
(2) by the reaction kettle it is closed after, from the injection end of reaction kettle inject carbon dioxide, to reaction kettle temperature, pressure
When power reaches and/or is more than CO 2 supercritical state, reaction kettle injection end is closed；
(3) outlet end that reaction kettle is connected to ultrasonic wave atomizing nozzle is opened, the material of supercritical carbon dioxide is dissolved in
It is sprayed by ultrasonic wave atomizing nozzle, while nano-scale particle is precipitated in pressure decline, nano-scale particle passes through gravitational differentiation
It is deposited on the collecting board of lower section and is collected.
Specifically, in the step (1) dehydrated alcohol, ionic type metal carbide mass ratio 1:30.
Specifically, the concrete operation method of the step (2) is carbon dioxide to be injected from reaction kettle inlet, and use increasing
Press pump is pressurized carbon dioxide, so that the pressure carbon dioxide of injection is more than the critical pressure 7MPa of carbon dioxide, and increase to
Stop injection carbon dioxide after 15MPa, closes the injection end of reaction kettle；Adding for reaction kettle is opened while injecting carbon dioxide
Thermal, temperature are adjusted to more than CO2Critical-temperature (such as 60 DEG C), reach sets requirement to pressure and temp, starting is placed on anti-
It answers the balance rotor in kettle to stir, ionic type metal carbide is made preferably to dissolve each other in supercritical carbon dioxide.
Specifically, step (3) concrete operation method are as follows: open reaction kettle outlet end, outlet end passes through high pressure resistant pipe
The ultrasonic nozzle moment of line connection ejects the ultra micro being precipitated in pressure reduction after supercritical carbon dioxide dissolution aluminium carbide
Particle, and so that extra ethyl alcohol is obtained flash evapn in the environment by being in high temperature oven, 90 DEG C are risen to oven temperature, this
When ultrasonic wave atomizing nozzle spray the particle that is precipitated from supercritical carbon dioxide, be deposited on powder collection plate, work as reaction kettle
Interior pressure closes outlet end after being down to supercritical carbon dioxide critical pressure 7MPa, stops injection output.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of includes the drying agent nanoscale ultramicro powder production method that ionic type metal carbide is applied to compact reservoir,
It is characterized in that, this method comprises the following steps:
It (1) will be in dehydrated alcohol, ionic type metal carbide merging high-temperature high-pressure reaction kettle；
(2) by the reaction kettle it is closed after, from the injection end of reaction kettle inject carbon dioxide, temperature, pressure to reaction kettle reach
When arriving and/or being more than CO 2 supercritical state, reaction kettle injection end is closed；
(3) outlet end that reaction kettle is connected to ultrasonic wave atomizing nozzle is opened, the material for being dissolved in supercritical carbon dioxide passes through
Ultrasonic wave atomizing nozzle sprays, while nano-scale particle is precipitated in pressure decline, and nano-scale particle is settled by gravitational differentiation
It is collected on the collecting board of lower section.
2. according to claim 1 includes that ionic type metal carbide is super applied to the drying agent nanoscale of compact reservoir
Microparticle production method, which is characterized in that dehydrated alcohol in the step (1), ionic type metal carbide mass ratio be 1:
30。
3. according to claim 1 includes that ionic type metal carbide is super applied to the drying agent nanoscale of compact reservoir
Microparticle production method, which is characterized in that further include the desiccation being used cooperatively with ionic type metal carbide in the step (1)
The molar ratio of agent aid, the desiccation agent aid and ionic type metal carbide is 1-2:1-2.
4. according to claim 1 includes that ionic type metal carbide is super applied to the drying agent nanoscale of compact reservoir
Microparticle production method, which is characterized in that the ionic type metal carbide is aluminium carbide, calcium carbide, lithium carbide, acetylene
Sodium.
5. according to claim 1 includes that ionic type metal carbide is super applied to the drying agent nanoscale of compact reservoir
Microparticle production method, which is characterized in that step (1) the desiccation agent aid is sodium ethoxide.
6. according to claim 1 includes that ionic type metal carbide is super applied to the drying agent nanoscale of compact reservoir
Microparticle production method, which is characterized in that the concrete operation method of the step (2) is to inject titanium dioxide from reaction kettle inlet
Carbon, and carbon dioxide is pressurized using booster pump, make the pressure carbon dioxide of injection more than the critical pressure of carbon dioxide
7MPa, and stop injection carbon dioxide after increasing to 15MPa, close the injection end of reaction kettle；It is beaten while injecting carbon dioxide
The heating device of reaction kettle is opened, temperature is adjusted to the critical-temperature higher than carbon dioxide, and institute's temperature regulating is 60 DEG C, to pressure temperature
Degree reaches sets requirement, starts the balance rotor stirring being placed in reaction kettle, make material preferably with supercritical carbon dioxide
It dissolves each other.
7. according to claim 1 includes that ionic type metal carbide is super applied to the drying agent nanoscale of compact reservoir
Microparticle production method, which is characterized in that step (3) concrete operation method are as follows: rise to 90 DEG C to temperature, open reaction kettle
Outlet end, at this moment ultrasonic wave atomizing nozzle sprays the nano-scale particle being precipitated from supercritical carbon dioxide, is deposited in particle receipts
Collect on plate, outlet end is closed after reacting kettle inner pressure is down to supercritical carbon dioxide critical pressure 7MPa, stops injection output.
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| CN201910721766.1A CN110396396A (en) | 2019-08-06 | 2019-08-06 | A kind of includes the drying agent nanoscale ultramicro powder production method that ionic type metal carbide is applied to compact reservoir |
| NL2026222A NL2026222B1 (en) | 2019-08-06 | 2020-08-05 | Method for preparing ultrafine nanopartical used in tight reservoir for drying agent containing ionic metal carbide |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112080266A (en) * | 2020-09-25 | 2020-12-15 | 西南石油大学 | Compact reservoir composite drying agent for improving salt resistance and preparation method thereof |
| CN113201320A (en) * | 2021-04-30 | 2021-08-03 | 西南石油大学 | Preparation method of high-purity modified nano drying agent for compact gas reservoir |
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| NL2026222A (en) | 2021-02-16 |
| NL2026222B1 (en) | 2021-09-17 |
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