CN109456747A - The production system and method for the high stability foam of graphitiferous particle - Google Patents
The production system and method for the high stability foam of graphitiferous particle Download PDFInfo
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- CN109456747A CN109456747A CN201811266821.4A CN201811266821A CN109456747A CN 109456747 A CN109456747 A CN 109456747A CN 201811266821 A CN201811266821 A CN 201811266821A CN 109456747 A CN109456747 A CN 109456747A
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- foam
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- graphite
- agitator tank
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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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/584—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific surfactants
Abstract
A kind of production system and method for the high stability foam of graphitiferous particle, comprising: agitator tank, particulate charge mouth, the liquid inlet opening being connected with the feed end of agitator tank；The agitator tank is divided into upper and lower part, is provided with Vltrasonic device on the inner wall on top；Lower part is provided with pipeline to be sequentially connected with external surge tank, pump, foam-making apparatus.The system can a set of flow process can produce the dispersion of Sheet Graphite particle or lamella graphite oxide particle compound surfactant.And after the foam maker on ground generates foam, suspended particulate that can be more stable, technical ability stable foam is also able to achieve the suspension of itself particle in the wellbore, so that smoothly injection stratum carries out profile control closure.
Description
Technical field
The present invention relates to the production systems and method of a kind of high stability foam of graphitiferous particle, belong to oil exploitation and grind
The technical field studied carefully.
Background technique
Foam flooding is widely used as a kind of technological means for improving oil recovery factor, has there is nearly application in 60 years so far
History.Foam can cause the reduction of gas phase relative permeability, delay gas fingering.Foam quality is to determine foam flooding efficiency
Key factor.However foam, as a kind of thermodynamically unstable dispersion, this unstability applies band to foam
Tremendous influence is carried out.Scholars both domestic and external have conducted extensive research around how improving foam stability, it was also proposed that many
Method.
Researching and developing novel foaming agent is a kind of important method.Chinese patent document ZL201210223060.0 discloses one
The composite foam system and preparation method thereof of kind oil gas field addition nano particle.Composite foam system is by anion surface active
Agent, modified silica nanoparticle, counter ion salt and water composition.The foam generated using the composite foam system, than common
The stable half foam life period of surfactant is long, but again bigger than the foaming volume of foam stabilizer generation foam is added.But the body
Nano particle preparation process used is complicated in system, involves great expense, can not be in oil-gas field development field large-scale application.
Chinese patent document ZL201510600689.6 discloses a kind of oil gas field novel inorganic subparticle enhanced foam
Foam system and preparation method thereof.Novel inorganic subparticle used in this method is to trap partial size≤2.5 μ screened in atmosphere
The fine particle of m, the surfactant compound that can give sasanguasaponin and sodium lauroyl glutamate composition form stable foam
System, and such subparticle is from a wealth of sources, mostly coal-burning power plant's solid waste, are applied to agent for improving oilfield recovery
Its resource utilization can be achieved, but such subparticle is influenced more by each batch coal kind, ingredient and burning degree
Obviously, complex changeable at being grouped as, so that it cooperates with the effect of stable foam to be difficult to control with surfactant compound.
In view of the above shortcomings of the prior art, 108165248 A of Chinese patent CN discloses steady based on graphite particle collaboration
Fixed strengthening foam system and preparation method thereof is that the graphite after anion and cationic surfactant are dual modified is thin
Piece can improve the mechanical strength of liquid film with adsorbed close on the gas-liquid interface of liquid film, while the graphite flake layer phase inside liquid film
Skeleton staggeredly mutually can be formed, delays thinning of liquid film, greatly improves the stability of foam system；Foam will be vanished the day after tomorrow in the earth formation
Right graphite is small to formation contaminant, and short grained graphite flake can be adsorbed onto formation pore surface, changes the wetability of reservoir, makes original
Oil is easier to produce；Composite foam system preparation process of the present invention is simple, it can be achieved that extensive quickly preparation, is adapted for oil/gas well
The foam system of application can significantly improve recovery ratio, volume increase, environmental protection.
It is used for however, can be realized efficient, continuous production there has been no a matched integration production injection device at present
Improve the foam system containing graphite particle and graphite oxide particle.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of production system of the high stability foam of graphitiferous particle.
The present invention also provides the injection integral methods of above-mentioned production system.
Technical scheme is as follows:
A kind of production system and method for the high stability foam of graphitiferous particle, comprising: agitator tank, with agitator tank into
Expect the connected particulate charge mouth in end, liquid inlet opening；The agitator tank is divided into upper and lower part, is provided on the inner wall on top
Vltrasonic device；Lower part is provided with pipeline to be sequentially connected with external surge tank, pump, foam-making apparatus.
It is preferred according to the present invention, filter membrane is provided in the agitator tank, the agitator tank is divided by the filter membrane
Upper and lower part.
It is preferred according to the present invention, the feeding inlet for cationic surfactant is added is provided on the surge tank.
Preferred according to the present invention, the foam-making apparatus is foam maker or magnetic agitation tank.
Using the integral method of the injection graphite particle of above-mentioned production system, comprise the following steps that
1) anionic surfactant solution, configuration cationic surfactant solution are configured；Prepare graphite particle；
2) it feeds: agitator tank is added along the liquid inlet opening in anionic surfactant solution；By graphite particle edge
Agitator tank is added in the particulate charge mouth；
3) agitator tank using agitating paddle and ultrasonic generator to the anionic surfactant solution and graphite particle into
Row ultrasonic disperse and stirring form mixed material；
4) mixed material is filtered through filter membrane, graphite dispersing solution is obtained after filtering, graphite in graphite dispersing solution
Concentration is 0.5~1.0wt.%；
5) it is pumped to foam-making apparatus after surge tank adds cationic surfactant, the foam finally generated is infused
Enter target oil well.
It is preferred according to the present invention, in step 5), foam liquid has been stirred using Waring Blender method
Bubble.Stable strengthening foam system is cooperateed with up to graphite particle.
Preferred according to the present invention, the concentration of the anionic surfactant solution is 0.3~1wt.%.
It is preferred according to the present invention, in step 3), the condition of ultrasonic disperse be 1-3h the time；Ultrasonic power is 500-
1000W。
Preferred according to the present invention, the filter membrane is that the graphite particle piece diameter in graphite dispersing solution can be made less than 5 microns,
Thickness is less than 20nm.
Preferred according to the present invention, the concentration of the cationic surfactant is 0.2~1wt.%.
It is preferred according to the present invention, magnetic agitation, the condition of magnetic agitation are carried out using magnetic agitation tank in step 5)
For time 0.5-1h, temperature is 25 DEG C -30 DEG C.
Preferred according to the present invention, in step 5), the Waring Blender method is that 8000rpm is stirred 3 minutes.
The gas source of the foam-making apparatus is air, nitrogen or carbon dioxide gas.
Using the integral method of the injection graphite oxide particle of above-mentioned production system, comprise the following steps that
1) cationic surfactant solution is configured；Prepare graphite oxide particle, dispersing agent；
2) it feeds: agitator tank is added along the liquid inlet opening in cationic surfactant solution；By graphite oxide
Agitator tank is added along the particulate charge mouth in grain；
3) agitator tank is using agitating paddle and ultrasonic generator to the cationic surfactant solution and graphite oxide
Grain carries out ultrasonic disperse and stirring, obtains sheet graphite oxide dispersion；
4) by the dispersing agent by addition in the graphite oxide dispersion, stirring obtains compounding dispersion liquid；
5) dispersion liquid being compounded after surge tank and being pumped to foam-making apparatus, the foam finally generated is by injection target oil
Well.
It is preferred according to the present invention, in step 5), compounding dispersion liquid is stirred using Waring Blender method
Mix blistering.
It is preferred according to the present invention, 0.3~0.7 part of the cationic surfactant, 0.1~0.3 part of dispersing agent, oxidation
0.2~0.5 part of graphite particle, 100 parts of water；Wherein, cationic surfactant is cetyl trimethylammonium bromide.
Preferred according to the present invention, the dispersing agent is sodium lignin sulfonate；The water is distilled water.
It is 3-5 μm that the preferred graphite oxide particle, which is 100 mesh flaky graphite partial sizes, according to the present invention, to the profit of water
Wet angle is 30 °~50 °.
Preferred according to the present invention, the mass concentration of the graphite oxide is 0.2~0.5wt.%.
Preferred according to the present invention, the condition of the ultrasonic disperse is time 2h, ultrasonic power 500-1000W.
Preferred according to the present invention, the mass concentration of the cetyl trimethylammonium bromide is 0.3~0.7wt.%；Wood
The mass concentration of quality sodium sulfonate is 0.1~0.3wt.%.
Preferred according to the present invention, the condition of stirring is 25 DEG C -30 DEG C of temperature, time 0.5-1h.
Preferred according to the present invention, compounding the contact angle of sheet graphite oxide and water in dispersion liquid is 80 °~90 °.
It is preferred according to the present invention, it is stirred 3 minutes in the Waring Blender method with the speed of 8000rpm.
Present invention has an advantage that
The present invention discloses the production system and method for a kind of high stability foam of graphitiferous particle, which can be a set of
Flow process can produce the dispersion of Sheet Graphite particle or lamella graphite oxide particle compound surfactant.And
After the foam maker on ground generates foam, suspended particulate that can be more stable, technical ability stable foam also can be real in the wellbore
The suspension of itself existing particle, so that smoothly injection stratum carries out profile control closure.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of system of the present invention；
In Fig. 1, agitator tank 1；Particulate charge mouth 2；Liquid inlet opening 3；Top 1-1；Lower part 1-2；Vltrasonic device 4；Pipe
Line 5；Surge tank 6；Pump 7；Foam-making apparatus 8；Filter membrane 9；Feeding inlet 10；Target oil well 11；The agitating paddle 12. of agitator tank.
Specific embodiment
The present invention is described in detail below with reference to embodiment and Figure of description, but not limited to this.
As shown in Figure 1.
Embodiment 1,
A kind of production system and method for the high stability foam of graphitiferous particle, comprising: agitator tank 1, with agitator tank 1
The connected particulate charge mouth 2 of feed end, liquid inlet opening 3；The agitator tank 1 divides for top 1-1 and lower part 1-2, in top 1-1
Inner wall on be provided with Vltrasonic device 4；In lower part, 1-2 is provided with pipeline 5 and external surge tank 6, pump 7, foam-making apparatus 8
It is sequentially connected.
Filter membrane 9 is provided in the agitator tank 1, the agitator tank is divided into top 1-1 and lower part 1- by the filter membrane 9
2.The feeding inlet 10 for cationic surfactant is added is provided on the surge tank.The foam-making apparatus is foam
Generator or magnetic agitation tank.
Embodiment 2,
Using the integral method of the injection graphite particle of production system described in embodiment 1, comprise the following steps that
1) anionic surfactant solution, configuration cationic surfactant solution are configured；Prepare graphite particle；
2) it feeds: agitator tank is added along the liquid inlet opening in anionic surfactant solution；By graphite particle edge
Agitator tank is added in the particulate charge mouth；
3) agitator tank using agitating paddle and ultrasonic generator to the anionic surfactant solution and graphite particle into
Row ultrasonic disperse and stirring form mixed material；
4) mixed material is filtered through filter membrane, graphite dispersing solution is obtained after filtering, graphite in graphite dispersing solution
Concentration is 0.5~1.0wt.%；
5) it is pumped to foam-making apparatus after surge tank adds cationic surfactant, the foam finally generated is infused
Enter target oil well.
In step 5), blistering is stirred to foam liquid using Waring Blender method.Up to graphite particle association
With stable strengthening foam system.
The concentration of the anionic surfactant solution is 0.3~1wt.%.
In step 3), the condition of ultrasonic disperse be 1-3h the time；Ultrasonic power is 500-1000W.
The filter membrane is that the graphite particle piece diameter in graphite dispersing solution can be made less than 5 microns, and thickness is less than 20nm.
The concentration of the cationic surfactant is 0.2~1wt.%.
Magnetic agitation is carried out using magnetic agitation tank in step 5 punching, the condition of magnetic agitation is time 0.5-1h, and temperature is
25℃-30℃。
In step 5), the Waring Blender method is that 8000rpm is stirred 3 minutes.The foam-making apparatus
Gas source be air, nitrogen or carbon dioxide gas.
Embodiment 3,
Using the integral method of the injection graphite oxide particle of production system as described in Example 1, comprise the following steps that
1) cationic surfactant solution is configured；Prepare graphite oxide particle, dispersing agent；
2) it feeds: agitator tank is added along the liquid inlet opening in cationic surfactant solution；By graphite oxide
Agitator tank is added along the particulate charge mouth in grain；
3) agitator tank is using agitating paddle and ultrasonic generator to the cationic surfactant solution and graphite oxide
Grain carries out ultrasonic disperse and stirring, obtains sheet graphite oxide dispersion；
4) by the dispersing agent by addition in the graphite oxide dispersion, stirring obtains compounding dispersion liquid；
5) dispersion liquid being compounded after surge tank and being pumped to foam-making apparatus, the foam finally generated is by injection target oil
Well.
In step 5), blistering is stirred to compounding dispersion liquid using Waring Blender method.
0.3~0.7 part of the cationic surfactant, 0.1~0.3 part of dispersing agent, graphite oxide particle 0.2~0.5
Part, 100 parts of water；Wherein, cationic surfactant is cetyl trimethylammonium bromide.
The dispersing agent is sodium lignin sulfonate；The water is distilled water.
The graphite oxide particle is 100 mesh flaky graphites, and partial size is 3-5 μm, and the angle of wetting to water is 30 °~50 °.
The mass concentration of the graphite oxide is 0.2~0.5wt.%.
The condition of the ultrasonic disperse is time 2h, ultrasonic power 500-1000W.
The mass concentration of the cetyl trimethylammonium bromide is 0.3~0.7wt.%；The quality of sodium lignin sulfonate
Concentration is 0.1~0.3wt.%.
The condition of stirring is 25 DEG C -30 DEG C of temperature, time 0.5-1h.
Compounding the contact angle of sheet graphite oxide and water in dispersion liquid is 80 °~90 °.
It is stirred 3 minutes in the Waring Blender method with the speed of 8000rpm.
Claims (10)
1. a kind of production system and method for the high stability foam of graphitiferous particle, which is characterized in that the production system packet
It includes: agitator tank, particulate charge mouth, the liquid inlet opening being connected with the feed end of agitator tank；The agitator tank is divided into top under
Portion is provided with Vltrasonic device on the inner wall on top；Lower part is provided with pipeline to fill with external surge tank, pump, foam
It sets and is sequentially connected.
2. the production system and method for a kind of high stability foam of graphitiferous particle according to claim 1, feature
It is, filter membrane is provided in the agitator tank, and the agitator tank is divided into upper and lower part by the filter membrane.
3. the production system and method for a kind of high stability foam of graphitiferous particle according to claim 1, feature
It is, the feeding inlet for cationic surfactant is added is provided on the surge tank.
4. the production system and method for a kind of high stability foam of graphitiferous particle according to claim 1, feature
It is, the foam-making apparatus is foam maker or magnetic agitation tank.
5. using the integral method of the injection graphite particle of production system as described in claim 1-4 any one, feature
It is, the method includes the steps as follows:
1) anionic surfactant solution, configuration cationic surfactant solution are configured；Prepare graphite particle；
2) it feeds: agitator tank is added along the liquid inlet opening in anionic surfactant solution；By graphite particle described in
Agitator tank is added in particulate charge mouth；
3) agitator tank surpasses the anionic surfactant solution and graphite particle using agitating paddle and ultrasonic generator
Sound dispersion and stirring, form mixed material；
4) mixed material is filtered through filter membrane, graphite dispersing solution is obtained after filtering, the concentration of graphite in graphite dispersing solution
For 0.5~1.0wt.%；
5) it is pumped to foam-making apparatus after surge tank adds cationic surfactant, the foam finally generated is by injection mesh
Mark oil well；
In step 5), blistering is stirred to foam liquid using Waring Blender method；
The concentration of the anionic surfactant solution is 0.3~1wt.%；
In step 3), the condition of ultrasonic disperse be 1-3h the time；Ultrasonic power is 500-1000W；
The filter membrane is that the graphite particle piece diameter in graphite dispersing solution can be made less than 5 microns, and thickness is less than 20nm；
The concentration of the cationic surfactant is 0.2~1wt.%；
Step 5 punching use magnetic agitation tank carry out magnetic agitation magnetic agitation condition for time 0.5-1h, temperature for 25 DEG C-
30℃；
In step 5), the Waring Blender method is that 8000rpm is stirred 3 minutes.
6. using the integral method of the injection graphite particle of production system as described in claim 1-4 any one, feature
It is, comprises the following steps that
1) cationic surfactant solution is configured；Prepare graphite oxide particle, dispersing agent；
2) it feeds: agitator tank is added along the liquid inlet opening in cationic surfactant solution；By graphite oxide particle edge
Agitator tank is added in the particulate charge mouth；
3) agitator tank using agitating paddle and ultrasonic generator to the cationic surfactant solution and graphite oxide particle into
Row ultrasonic disperse and stirring obtain sheet graphite oxide dispersion；
4) by the dispersing agent by addition in the graphite oxide dispersion, stirring obtains compounding dispersion liquid；
5) dispersion liquid being compounded after surge tank and being pumped to foam-making apparatus, the foam finally generated is by injection target oil well.
7. the integral method of injection graphite particle as claimed in claim 6, which is characterized in that in step 5), utilize
Waring Blender method is stirred blistering to compounding dispersion liquid.
8. the integral method of injection graphite particle as claimed in claim 6, which is characterized in that the cationic surfactant
0.3~0.7 part, 0.1~0.3 part of dispersing agent, 0.2~0.5 part of graphite oxide particle, 100 parts of water；Wherein, cationic surface is living
Property agent be cetyl trimethylammonium bromide；
The dispersing agent is sodium lignin sulfonate；The water is distilled water；
The graphite oxide particle is 100 mesh flaky graphites, and partial size is 3-5 μm, and the angle of wetting to water is 30 °~50 °；
The mass concentration of the graphite oxide is 0.2~0.5wt.%；
The condition of the ultrasonic disperse is time 2h, ultrasonic power 500-1000W.
9. the integral method of injection graphite particle as claimed in claim 6, which is characterized in that the cetyl trimethyl bromine
The mass concentration for changing ammonium is 0.3~0.7wt.%；The mass concentration of sodium lignin sulfonate is 0.1~0.3wt.%；
The condition of stirring is 25 DEG C -30 DEG C of temperature, time 0.5-1h.
10. the integral method of injection graphite particle as claimed in claim 6, which is characterized in that piece in the compounding dispersion liquid
The contact angle of layered graphite oxide and water is 80 °~90 °；
It is stirred 3 minutes in the Waring Blender method with the speed of 8000rpm.
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| CN201811266821.4A CN109456747A (en) | 2018-10-29 | 2018-10-29 | The production system and method for the high stability foam of graphitiferous particle |
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| CN201811266821.4A CN109456747A (en) | 2018-10-29 | 2018-10-29 | The production system and method for the high stability foam of graphitiferous particle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110898741A (en) * | 2019-12-12 | 2020-03-24 | 中国石油大学(北京) | Oil field is with fly ash reinforcing foam forming device and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104549021A (en) * | 2015-01-13 | 2015-04-29 | 中国石油大学(华东) | Device for preparing hydrophobic nanoparticles and surfactant compounded dispersoid and application of hydrophobic nanoparticles and surfactant compounded dispersoid |
| CN108165248A (en) * | 2018-03-05 | 2018-06-15 | 中国石油大学(华东) | Based on stable strengthening foam system of graphite particle collaboration and preparation method thereof |
| CN108410441A (en) * | 2018-03-05 | 2018-08-17 | 中国石油大学(华东) | Based on the strengthening foam system and preparation method thereof that the collaboration of graphite oxide particle is stable |
-
2018
- 2018-10-29 CN CN201811266821.4A patent/CN109456747A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104549021A (en) * | 2015-01-13 | 2015-04-29 | 中国石油大学(华东) | Device for preparing hydrophobic nanoparticles and surfactant compounded dispersoid and application of hydrophobic nanoparticles and surfactant compounded dispersoid |
| CN108165248A (en) * | 2018-03-05 | 2018-06-15 | 中国石油大学(华东) | Based on stable strengthening foam system of graphite particle collaboration and preparation method thereof |
| CN108410441A (en) * | 2018-03-05 | 2018-08-17 | 中国石油大学(华东) | Based on the strengthening foam system and preparation method thereof that the collaboration of graphite oxide particle is stable |
Non-Patent Citations (2)
| Title |
|---|
| 付美龙: "《油田应用化学》", 31 December 2005, 武汉:武汉大学出版社 * |
| 刘一江: "《化学调剖堵水技术》", 30 November 1999, 北京:石油工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110898741A (en) * | 2019-12-12 | 2020-03-24 | 中国石油大学(北京) | Oil field is with fly ash reinforcing foam forming device and application thereof |
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Application publication date: 20190312 |