CN103409120A - Polymer nano intercalation composite plugging agent as well as preparation method and application thereof - Google Patents
Polymer nano intercalation composite plugging agent as well as preparation method and application thereof Download PDFInfo
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- CN103409120A CN103409120A CN2013102821732A CN201310282173A CN103409120A CN 103409120 A CN103409120 A CN 103409120A CN 2013102821732 A CN2013102821732 A CN 2013102821732A CN 201310282173 A CN201310282173 A CN 201310282173A CN 103409120 A CN103409120 A CN 103409120A
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Abstract
The invention relates to a polymer nano intercalation composite plugging agent as well as a preparation method and an application thereof. The plugging agent is formed by compounding a nano intercalation polymer solution and a crosslinking agent, wherein the nano intercalation polymer solution is generated by carrying out solution intercalation on polyacrylamide and organic bentonite intercalation materials. A plugging agent system prepared from oilfield sewage with degree of mineralization of 0-40000mg/L comprises 3000-5000mg/L of nano intercalation polymer solution and 800-3500mg/L of crosslinking agent and can form stable gel at 50-140 DEG C. The plugging agent has the beneficial effects that as the characteristics of the polymer are improved by the nano intercalation materials, the temperature, salt and scouring resistance of the plugging agent is improved; compared with the conventional polymer gel, the plugging agent has substantially improved water phase plugging rate and plugging strength and expanded application range and conditions.
Description
Technical field
The present invention relates to a kind of chemical plugging agent and preparation method thereof and application, specifically a kind of polymer nanocomposite intercalation composite material blocking agent and preparation method thereof and application.
Background technology
Along with oil-field development deepens continuously, well water is on the rise, profile control and water plugging technology has become the leading technique of high water-cut stage water and oil control, it has alleviated between the well that on waterflooding phase plane, liquid flow point cloth inequality causes the contradiction of disturbing, vertically go up development degree difference generation in interlayer and layer, increased reservoir water drive development degree, thereby improve such reservoir water drive exploitation recovery ratio, improve whole economic efficiency and the production level in oil field.
The blocking agent (plugging agent) of research and development application both at home and abroad has following a few class at present, respectively has different characteristics.
(1) sedimentation type inorganic salts blocking agent.As water glass calcium chloride blocking agent plugging agent, milk of lime amendment etc.After this class chemical agent injects stratum, can form precipitation duct, tamper shutoff stratum.Because this reactant is all the aqueous solution, and viscosity lower (near with water), thereby can optionally enter high water accepting layer, in stratum, after reaction, most permeable zone is produced to more effective ponding.
(2) Ploymer Gel Plugging Agent.As polyacrylamide Gelling Water-plugging amendment HPAM-Cr
3+, the acrylic amide frozen glue TP-910 amendment that underground polymerization is crosslinked and polyacrylamide copolymer class water plugging profile control agent etc.Gel-type amendment and plugging agent, it is by take the physical clogging of polymer gel as main that water is resulted in blockage, and has absorption and residual resistive concurrently, strengthens the effect of water plugging effect.
(3) particulate species blocking agent.Mainly comprise great soil group, as clay, the Yellow River soil etc.; Non-volume expansion type granular, as shell, milk of lime, bluestone powder etc.; Volume expansion type granular, as lightly crosslinked polyacrylamide, polyvinyl alcohol powder and pre-crosslinked gel particle etc.The mechanism of action of this class blocking agent is mainly the physical clogging effect, comprises trapping effect, throwing out etc.The volume expansion type granular water-swellable, strengthened its shut-off capacity, is more suitable for the shutoff of crack and macropore.
(4) foam class blocking agent.According to the composition of foaming liquid, be divided into two-phase foam and three-phase froth.Three-phase froth is than two-phase foam stabilization.The profile control mechanism of three-phase froth is to rely on stable aerated fluid in the water filling layer, to produce the Jamin effect of superposition, change seepage direction and intake profile in water accepting layer, thereby the pasta of sweeping that enlarges injected water amasss, slow down water-front advance velocity and the water regain of main water (flow) direction, improve the swept volume of injected water.
(5) change rock wettability class blocking agent.Mainly comprise cats product and silicomethane plugging agent.Wherein: 1. cats product.Because rock surface is electronegative property, use cats product, its positively charged part is adsorbed mutually and is made its hydrophobic end outwardly with rock surface, even rock surface is covered with the alkyl layer of one deck oleophylic, thereby increased permeability to oil, reduce water phase permeability, thereby had plugging function.As quaternary ammonium salt etc.2. silicomethane plugging agent.Under formation condition, silicomethane and water mutual effect generation polycondensation, make rock surface set up the hydrophobic effect.For example, the trimethoxy-benzene base silane, can form effective hydrophobic nature at rock surface, simultaneously on the blowhole surface, good adhesivity is arranged, can also interact and form the polymeric film with hydrophobic nature with primary pent-up water in oil reservoir, oil stream is enlarged to the free area in duct relatively, and the opposite phase permeability that can limit or stop the mobile of water and reduce water, reach the selectively blocking off local water effectively.Cyanogen coagulates plugging agent, active viscous crude plugging agent also belongs to this type of.
(6) resene blocking agent.Comprise resol, epoxy resin, furfuryl alcohol resin and thermoplastic polymer.After the resin dilution, enter stratum, cured strength is high under stiffening agent and formation temperature effect, and duct " is blocked ".Be suitable for envelope and alter leak stopping and high-temperature stratum.The high non-selectivity of the method price, be difficult to process after mistake is stifled, applies now less.
(7) microbiology class blocking agent.As dextran coccus, sulphate reducing bacteria etc.To the down-hole bacterial classification, provide essential nutritive medium, make bacterium in stratum, breed growth, macropore or most permeable zone are formed to obstruction, reach the purpose of water plugging and profile controlling.
(8) other class blocking agent.As the cement class, comprise the plugging agents such as oil base cement, superfine cement, foamed cement; The complex class blocking agent, according to the characteristics of oil reservoir, adopt several chemical agents to be used in combination, to meet the demand of water plugging and profile controlling.
The oilwell water shutoff technology is short as a kind of working cycle, the measure of instant effect comes into one's own always, but due to the intensity of blocking agent poor selectivity or non-selectivity and blocking agent material exist limitation (as high as cement class inorganic materials intensity, be difficult to enter earth formation deep; The organogel class easily enters earth formation deep, but after plastic, body intensity is little, poor toughness, easily broken), cause water plugging effect poor.In addition, along with oil-field development enters the middle and later periods, the exploitation difficulty continues to increase, and hole condition is also more complicated.The well of high temperature, high salinity geologic condition constantly occurs.High salinity can have a strong impact on the overall performance of gel, makes the intensity of gel not to be effectively guaranteed, and then affects the validity period of gel in stratum, affects the ultimate recovery factor in oil field.
Summary of the invention
One object of the present invention is to provide a kind of blocking agent that can be applicable to the type material under the high temperature and high salt oil deposit condition, the deficiencies such as the flushing resistance that has the polyacrylamide gel blocking agent now is poor to overcome, heat-resistant salt-resistant poor performance.
Another object of the present invention is to provide the preparation method of the blocking agent of described type material, prepare with simple, gentle operation the blocking agent that crosslinked ability is strong, flushing resistance strong, the heat-resistant salt-resistant performance is good.
Another object of the present invention is to provide the application of described blocking agent, particularly apply the method that described water plugging profile control agent carries out water plugging and profile controlling.
On the one hand, the invention provides a kind of blocking agent of type material, it is mainly to comprise the polymer nanocomposite intercalation composite material, in the present invention, is referred to as polymer nanocomposite intercalation composite material blocking agent.
The polymer nanocomposite intercalation composite material is an emerging research field that has development potentiality.It ideally combines the toughness of the rigidity of inorganic silicate wafer, dimensional stability and thermostability and polymkeric substance, workability etc., the mechanical strength of this material is high, good toughness, good heat resistance, quality is light, easy to process, as structured material, by people, accepted extensively, can be applicable to numerous industrial occasions.In the present invention, be these characteristics of utilizing the polymer nanocomposite intercalation composite material, using it as a kind of novel high strength water plugging and profile controlling material.
According to the specific embodiment of the invention scheme, the invention provides a kind of polymer nanocomposite intercalation composite material blocking agent, this blocking agent is comprised of nano intercalated polymers soln and crosslinker compounding, wherein, described nano intercalated polymers soln is to utilize polyacrylamide and organobentonite intercalation material carry out solution intercalation and generate.
In the present invention, utilize polyacrylamide (HPAM) and intercalation material (organobentonite) to carry out solution intercalation, generate a kind of nano intercalated polymers soln, under the effect of linking agent, can form gel plugging agent, this blocking agent has than the stronger heat-resistant salt-resistant performance of non-nano intercalation polymeric thing frozen glue, and stronger flushing resistance, can overcome the deficiency that has the polyacrylamide gel blocking agent now, can be used as a kind of blocking agent that can be applicable under the high temperature and high salt oil deposit condition.
According to the specific embodiment of the invention scheme, in polymer nanocomposite intercalation composite material blocking agent of the present invention, described nano intercalated polymers soln prepares in accordance with the following methods:
Sodium bentonite (smectite content is greater than 70%) mixes with water, is warming up to 50～90 ℃, adds cetyl trimethylammonium bromide or Dodecyl trimethyl ammonium chloride, and 50～90 ℃ of stirrings of holding temperature 1～5 hour, obtain organobentonite intercalation material solution; Perhaps, the organobentonite intercalation material is dispersed in Virahol and directly is mixed with organobentonite intercalation material solution;
Organobentonite intercalation material solution and polyacrylamide solution are carried out to solution intercalation, obtain nano intercalated polymers soln.
More specifically, the mixing quality ratio of wherein said sodium bentonite and water is (3～10): 100; The weight ratio of described cetyl trimethylammonium bromide or Dodecyl trimethyl ammonium chloride and sodium bentonite is (2～4): 5.
More specifically, the organobentonite intercalation material being dispersed in the process of preparation organobentonite intercalation material solution in Virahol, is that organobentonite is dispersed in Virahol and is mixed with 50000～100000mg/L organobentonite intercalation material solution.According to the specific embodiment of the invention scheme, in this process for preparation, organobentonite used adopts and is purchased common organobentonite and gets final product, in the present invention using it as intercalation material.
Except indicating especially, ratio described in the present invention and content are mass ratio and content.
Preferably, by sodium bentonite with after water mixes, can first stir 2 hours, make the sodium bentonite water suction fully expand, be dispersed in water, and the temperature that progressively raises is until 50～90 ℃, and then adding cetyl trimethylammonium bromide, 50～90 ℃ of continuation of holding temperature were stirred 1～5 hour, obtained organobentonite intercalation material solution.
Next organobentonite intercalation material solution is mixed with polyacrylamide solution, stir, can prepare and obtain nano intercalated polymers soln.Wherein, in described polyacrylamide solution, the polyacrylamide mass concentration is 0.5%～3.0%, and this polyacrylamide solution is 1000:8～120 with the mixed volume ratio of organobentonite intercalation material solution.According to the preferred embodiments of the invention, described polyacrylamide is the partially hydrolyzed polyacrylamide of degree of hydrolysis 12%～26%, and molecular weight is 1,000 ten thousand～18,000,000.
According to the specific embodiment of the invention scheme, in polymer nanocomposite intercalation composite material blocking agent of the present invention, nano intercalated polymers soln mass concentration is 3000～5000mg/L; Described linking agent can be phenolic resin crosslinking agent (water-soluble resol) or organic chromium linking agent (Chromic lactate), and in polymer nanocomposite intercalation composite material blocking agent, the linking agent mass concentration is 800～3500mg/L.
On the other hand, the present invention also provides the preparation method of described polymer nanocomposite intercalation composite material blocking agent, and the method comprises:
Utilize polyacrylamide and organobentonite intercalation material to carry out solution intercalation and generate nano intercalated polymers soln;
Nano intercalated polymers soln and linking agent are mixed with to polymer nanocomposite intercalation composite material blocking agent.
According to the specific embodiment of the invention scheme, the preparation method of polymer nanocomposite intercalation composite material blocking agent of the present invention comprises step:
(1) preparation method one of organobentonite intercalation material solution: sodium bentonite mixes with water, be warming up to 50～90 ℃, add cetyl trimethylammonium bromide or Dodecyl trimethyl ammonium chloride, 50～90 ℃ of stirrings of holding temperature 1～5 hour, obtain organobentonite intercalation material solution; Wherein, preferably, the mixing quality ratio of described sodium bentonite and water is (3～10): 100; The weight ratio of described cetyl trimethylammonium bromide or Dodecyl trimethyl ammonium chloride and sodium bentonite is (2～4): 5;
(2) preparation method two of organobentonite intercalation material solution: take the organobentonite intercalation material and be dispersed in Virahol, preparation 50000～100000mg/L organobentonite intercalation material solution stirs;
(3) preparation of nano intercalated polymers soln: above-mentioned resulting organobentonite intercalation material solution is mixed with polyacrylamide solution, obtain nano intercalated polymers soln; Wherein, preferably, in described polyacrylamide solution, the polyacrylamide mass concentration is 0.5%～3.0%, and polyacrylamide quality and the organobentonite intercalation material mass ratio of this polyacrylamide solution and organobentonite intercalation material solution are 10:(1～6);
(4) preparation of polymer nanocomposite intercalation composite material blocking agent: by nano intercalated polymers soln and crosslinker compounding, be mixed with polymer nanocomposite intercalation composite material blocking agent; Wherein, preferably, described linking agent is phenolic resin crosslinking agent or organic chromium linking agent, and in polymer nanocomposite intercalation composite material blocking agent, the linking agent mass concentration is 800～3500mg/L.
The preparation method who contains the polymers soln of nano intercalated material provided by the invention, simple to operate, the reaction conditions gentleness, be easy to control, to production unit without particular requirement.
In a specific embodiments of the present invention, the raw material for preparing polymer nanocomposite intercalation composite material blocking agent of the present invention comprises: polymkeric substance (HPAM), sodium bentonite, cetyl trimethylammonium bromide, Dodecyl trimethyl ammonium chloride and distilled water (or injected water) etc.Concrete operations are as follows:
(1) prepare intercalation material solution: in the 250mL there-necked flask, add the 5.0g sodium bentonite, after adding 100mL distilled water, stirred 2 hours by electric blender, and the temperature that progressively raises is until 70 ℃, add 3.0g cetyl trimethylammonium bromide or Dodecyl trimethyl ammonium chloride, under 70 ℃, continue stirring and got final product in 4 hours;
(2) prepare nano intercalated polymers soln: in the 1%HPAM of 1L solution, add 8～120mL intercalation material solution, stir and get final product;
(3) prepare polymer nanocomposite intercalation composite material blocking agent: get the nano intercalated polymers soln of 30～50mL, the organic chromium linking agent of 0.10～0.35mL or the phenolic resin crosslinking agent of 0.08～0.35mL, adding water to cumulative volume is 100mL, stirs and gets final product.
On the other hand, the present invention also provides the application of described polymer nanocomposite intercalation composite material blocking agent in the oilwell water shutoff profile control.Blocking agent of the present invention has heatproof (see figure 3), salt tolerant (in Table 3) and flushing resistance (see figure 5), can increase substantially sealing ratiod and the plugging strength (see figure 4) of polymer nanocomposite intercalation composite material blocking agent to water.
On the other hand, the present invention also provides the method that described polymer nanocomposite intercalation composite material blocking agent is carried out water plugging and profile controlling of applying, the method comprises: according to blocking agent formulating of recipe ratio, during the on-the-spot sewage that calculates the polymer nanocomposite intercalation solution of volume and cross-linking agent solution and join certain volume is filled with, after being uniformly mixed, pumping into the processing layer position and get final product.This blocking agent can be used for the oil well of 50～140 ℃.The salinity of preparation blocking agent water is 0～40000mg/L.
In sum, the invention provides a kind of polymer nanocomposite intercalation composite material blocking agent and preparation method thereof and application, in the present invention, be based on the solution intercalation technology, with sodium bentonite, prepare organobentonite solution through particular procedure, perhaps with commercially available organobentonite, be dispersed in Virahol and be mixed with organobentonite solution, using such organobentonite solution as intercalation material solution, further with polymkeric substance and intercalation material, interact and prepare nano intercalated polymers soln, nano intercalated polymers soln and linking agent effect, can be used to prepare polymer gel, as a kind of plugging agent, for existing polymer gel blocking agent has increased new kind.Due to nano intercalated material, improved the characteristic of polymkeric substance, can improve heatproof, salt tolerant and the flushing resistance of polymer gel, further increased substantially sealing ratiod and the plugging strength of polymer nanocomposite intercalation composite material blocking agent to water, for it, select application to create condition under the different operating state, its range of application and application conditions are expanded.
The accompanying drawing explanation
Fig. 1 is PICA-1/ phenolic resin system viscosity graphic representation over time in the specific embodiment of the invention.
Fig. 2 is PICA-2/ organic chromium system viscosity graphic representation over time in the specific embodiment of the invention.
Fig. 3 is the heat resistance graphic representation of polymer nanocomposite intercalation composite material blocking agent in the specific embodiment of the invention.
Fig. 4 is polymer nanocomposite intercalation composite material blocking agent and conventional polymer gel plugging agent intensity contrast graphic representation in the present invention's one specific embodiment.
Fig. 5 is the flushing resistance correlation curve figure of polymer nanocomposite intercalation composite material blocking agent and conventional polymer gel plugging agent in the present invention's one specific embodiment.
Embodiment
Below by specific embodiment, describe technology of the present invention and characteristics in detail, but these embodiment are not in order to limit protection scope of the present invention.
Take the 5.0g sodium bentonite and be placed in the there-necked flask that is equipped with agitator and prolong, after adding 100mL distilled water in bottle, stirred 2 hours by electric blender, and the temperature that progressively raises is until 70 ℃, add the 3.0g cetyl trimethylammonium bromide, under 70 ℃, continue to stir 4 hours, can obtain intercalation material solution (ICA-1).
The HPAM that takes 10.0g is dispersed in the water of 1L (tap water or on-the-spot sewage), stirs 2 hours; To the intercalation material solution (ICA-1) that adds 40mL in 1% HPAM solution, electric blender stirred 1 hour, obtained nano intercalated polymers soln (PICA-1).
Take the 5.0g sodium bentonite and be placed in the there-necked flask that is equipped with agitator and prolong, after adding 100mL distilled water in bottle, stirred 2 hours by electric blender, and the temperature that progressively raises is until 70 ℃, add the 3.0g Dodecyl trimethyl ammonium chloride, under 70 ℃, continue to stir 4 hours, can intercalation material solution (ICA-2).
The HPAM that takes 10.0g is dispersed in the water of 1L (tap water or on-the-spot sewage), stirs 2 hours; To the intercalation material solution (ICA-2) that adds 20mL in 1% HPAM solution, electric blender stirred 1 hour, obtained nano intercalated polymers soln (PICA-2).
Embodiment 3
Take 16.0g organobentonite intercalation material, and pour in the glass cylinder of 200mL Virahol, stirred 1 hour with agitator, obtain 80000mg/L organobentonite intercalation material solution (ICA-3).
The HPAM that takes 10.0g is dispersed in the water of 1L (tap water or on-the-spot sewage), stirs 2 hours; To the intercalation material solution (ICA-3) that adds 20mL in 1% HPAM solution, electric blender stirred 1 hour, obtained nano intercalated polymers soln (PICA-3).
Performance one: the cross-linking properties of nano intercalated polymers soln and phenolic resin crosslinking agent
The PICA-1 mass concentration is 3000mg/L, the pH value is 8.5, the system salinity is 9000mg/L, change phenolic resin crosslinking agent (water-soluble resol) mass concentration (being respectively 800mg/L, 1500mg/L, 2000mg/L and 2500mg/L), 65 ℃ of lower system viscosities are over time in Table 1.Along with crosslinker concentration increases, the crosslinking reaction speed of polymer nanocomposite intercalation composite material blocking agent cross-linking system is accelerated, and crosslinking time shortens, and intensity enhancing.
The impact of table 1 phenolic resin crosslinking agent on polymer nanocomposite intercalation composite material blocking agent system viscosity
Fixedly phenolic resin crosslinking agent concentration is 1000mg/L, and the pH value is 8.5, and the system salinity is 9000mg/L, and PICA-1 concentration is 1500mg/L, 2000mg/L, 2500mg/L and 3500mg/L, and 65 ℃ of lower system viscosities are shown in Fig. 1 over time.The viscosity of polymer nanocomposite intercalation composite material blocking agent cross-linking system changes all will be through a first rising, raise rapidly again, the process finally tended to be steady, the rate of crosslinking of this explanation blocking agent cross-linking system has passed through the process of " slowly increasing-raise rapidly-tend to be steady ".When nano intercalated polymer solution concentration is 1500mg/L, 2000mg/L, 2500mg/L and 3500mg/L, initial crosslinking time and the crosslinked deadline of polymer nanocomposite intercalation composite material blocking agent cross-linking system are basically identical, and the viscosity of cross-linking system while stablizing has a great difference, increase with the increase of nano intercalated polymer solution concentration.
Performance two: the cross-linking properties of nano intercalated polymers soln and organic chromium linking agent
The PICA-2 mass concentration is 3000mg/L, the pH value is 8.5, the system salinity is 9000mg/L, changes organic chromium linking agent (Chromic lactate) mass concentration (being respectively 1000mg/L, 1500mg/L, 2000mg/L and 2500mg/L), and 65 ℃ of lower system viscosities are over time in Table 2.Cross-linking properties and phenolic resin crosslinking agent system are basically identical, and the intensity crosslinker concentration of polymer nanocomposite intercalation composite material blocking agent cross-linking system increases.
The impact of table 2 organic chromium linking agent on polymer nanocomposite intercalation composite material blocking agent system viscosity
Fixing organic chromium cross linker concentration is 1000mg/L, and the pH value is 8.5, and the system salinity is 9000mg/L, and PICA-2 concentration is 1500mg/L, 2000mg/L, 2500mg/L and 3500mg/L, and 65 ℃ of lower system viscosities are shown in Fig. 2 over time.The Crosslinking regulation of PICA-2/ organic chromium system is similar to the PICA-1/ phenolic resin system, and namely the viscosity of polymer nanocomposite intercalation composite material blocking agent cross-linking system increases with the increase of nano intercalated polymer solution concentration.
Performance three: the heat resistance of polymer nanocomposite intercalation composite material blocking agent
The blocking agent system of preparation 3000～5000mg/L polymer nanocomposite intercalation solution (PICA-2) and 2000～3500mg/L organic chromium linking agent, have good cross-linking properties under 50～140 ℃.Table 3 is listed the polymer nanocomposite intercalation composite plugging agent of 5000mg/LPICA-2+3500mg/L organic chromium and the conventional polymer blocking agent of 5000mg/L HPAM+3500mg/L organic chromium forms gel strength under 65～140 ℃.
The heat resistance of table 3 polymer nanocomposite intercalation composite material blocking agent and conventional polymer blocking agent
The matrix material blocking agent that the 3000mg/L polymer nanocomposite intercalation solution (PICA-2) that plastic is good+2000mg/L organic chromium linking agent (Chromic lactate) forms is placed in 85 ℃ of constant temperature ovens, measured the stability under formation temperature of polymer nanocomposite intercalation composite material blocking agent, result as shown in Figure 3, blocking agent intensity drops to 32.8KPa from initial 34.2KPa in 60 days, fall is 4%, shows that the heatproof of polymer nanocomposite intercalation composite material blocking agent has good stability.
Performance four: the anti-salt property of polymer nanocomposite intercalation composite material blocking agent
The PICA-2 mass concentration is 3000mg/L, organic chromium linking agent (Chromic lactate) mass concentration is 2000mg/L, crosslinking temperature is 65 ℃, the pH value is 8.5, change system salinity is 10000mg/L, 20000mg/L and 40000mg/L, measure the viscosity of the cross-linking system under different salinities over time, in Table 4.Along with salinity increases, the gelation time of system extends, and gelling strength slightly has reduction.This is because the too high polymer molecular chain that causes of salinity is tending towards curling, and the amide group quantity that makes to participate in crosslinking reaction reduces, thereby gelation time is extended, and gelling strength slightly has reduction, but final viscosity surpasses>=10
5MPas.Anti-salt experimental result shows that this blocking agent has good salt resistant character.
Under the different salinities of table 4, gelling system viscosity over time
Performance five: the sealing characteristics of polymer nanocomposite intercalation composite material blocking agent
This investigation experiment has been compared at the plugging strength of 65 ℃ of lower polymer nanocomposite intercalation composite material blocking agents (PICA-2 and organic chromium linking agent) with polymer gel blocking agent (HPAM and organic chromium linking agent), and result as shown in Figure 4.The intensity of polymer nanocomposite intercalation composite material blocking agent is better than the conventional polymer gel plugging agent, under identical polymkeric substance and linking agent working concentration, after nano intercalation compounding blocking agent plastic intensity be after general polymer blocking agent plastic more than 1.5 times.
Performance six: the flushing resistance of polymer nanocomposite intercalation composite material blocking agent
In rate of permeation, be in the fill out sand tube of 1.200 darcies, compared the flushing resistance of polymer nanocomposite intercalation blocking agent (the organic chromium linking agent of the PICA-2 of 5000mg/L and 3500mg/L) with conventional polymer gel plugging agent (the organic chromium linking agent of the HPAM of 5000mg/L and 3500mg/L), result as shown in Figure 5.The flushing resistance of polymer nanocomposite intercalation composite material blocking agent is better than the conventional polymer gel plugging agent.
Claims (10)
1. polymer nanocomposite intercalation composite material blocking agent, this blocking agent is comprised of nano intercalated polymers soln and crosslinker compounding, wherein, described nano intercalated polymers soln is to utilize polyacrylamide and organobentonite intercalation material carry out solution intercalation and generate.
2. polymer nanocomposite intercalation composite material blocking agent according to claim 1, wherein, described nano intercalated polymers soln prepares in accordance with the following methods:
Sodium bentonite mixes with water, is warming up to 50～90 ℃, adds cetyl trimethylammonium bromide or Dodecyl trimethyl ammonium chloride, and 50～90 ℃ of stirrings of holding temperature 1～5 hour, obtain organobentonite intercalation material solution; Perhaps, the organobentonite intercalation material is dispersed in the Virahol of certain volume, stirs and directly be mixed with organobentonite intercalation material solution;
Organobentonite intercalation material solution and polyacrylamide solution are carried out to solution intercalation, obtain nano intercalated polymers soln.
3. polymer nanocomposite intercalation composite material blocking agent according to claim 2, wherein:
With sodium bentonite, prepare in the process of organobentonite intercalation material solution, the blending ratio of described sodium bentonite and water is (3～10): 100; The weight ratio of described cetyl trimethylammonium bromide or Dodecyl trimethyl ammonium chloride and sodium bentonite is (2～4): 5;
Perhaps, the organobentonite intercalation material is dispersed in the process of preparation organobentonite intercalation material solution in Virahol, the concentration of polymer solution of described organobentonite intercalation material is 50000～100000mg/L.
4. according to the described polymer nanocomposite intercalation composite material of claim 2 or 3 blocking agent, wherein, in described polyacrylamide solution, the polyacrylamide mass concentration is 0.5%～3.0%, and polyacrylamide quality and the organobentonite intercalation material mass ratio of this polyacrylamide solution and organobentonite intercalation material solution are 10:(1～6).
5. polymer nanocomposite intercalation composite material blocking agent according to claim 1, wherein, described polyacrylamide is the partially hydrolyzed polyacrylamide of degree of hydrolysis 12%～26%, molecular weight is 1,000 ten thousand～1,800 ten thousand.
6. polymer nanocomposite intercalation composite material blocking agent according to claim 1, wherein, described linking agent is phenolic resin crosslinking agent or organic chromium linking agent, in polymer nanocomposite intercalation composite material blocking agent, the linking agent mass concentration is 800～3500mg/L.
7. the preparation method of the described polymer nanocomposite intercalation composite material of claim 1～6 any one blocking agent, the method comprises:
Utilize polyacrylamide and organobentonite intercalation material to carry out solution intercalation and prepare nano intercalated polymers soln;
By nano intercalated polymers soln and linking agent prepared polymer nano intercalation compounding material blocking agent.
8. the application of the described polymer nanocomposite intercalation composite material of claim 1～6 any one blocking agent in the oilwell water shutoff profile control.
9. application according to claim 8, wherein, become the blocking agent system of the nano intercalated polymers soln of 3000～5000mg/L and 800～3500mg/L linking agent with the Oil Field waste water that salinity is 0～40000mg/L, carry out the oilwell water shutoff profile control.
10. application rights requires the described polymer nanocomposite intercalation composite material of 1～6 any one blocking agent to carry out the method for water plugging and profile controlling, the method comprises: according to blocking agent formulating of recipe ratio, to calculate in the polymer nanocomposite intercalation solution of volume and on-the-spot Water Tank that cross-linking agent solution joins certain volume, after being uniformly mixed, pump into the processing layer position; Preferably, described blocking agent is the oil well for 50～140 ℃.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105368424A (en) * | 2015-10-20 | 2016-03-02 | 西南石油大学 | Intercalation delay in-situ polymerization water shutoff gel for high-temperature oil reservoir |
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| CN111410945A (en) * | 2020-03-24 | 2020-07-14 | 中国石油天然气股份有限公司 | Capsule temporary plugging well killing fluid and preparation method thereof |
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Cited By (11)
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| CN105368424A (en) * | 2015-10-20 | 2016-03-02 | 西南石油大学 | Intercalation delay in-situ polymerization water shutoff gel for high-temperature oil reservoir |
| CN107118751A (en) * | 2017-06-10 | 2017-09-01 | 大庆东油睿佳石油科技有限公司 | A kind of inorganic gel profile control agent and its application method for being applicable oil recovery by heating |
| CN107384343A (en) * | 2017-06-27 | 2017-11-24 | 任丘市泰华石油科技有限公司 | A kind of high temperature resistant oil reservoir profile-controlling and plugging agent |
| CN108504341A (en) * | 2018-04-17 | 2018-09-07 | 中国海洋石油集团有限公司 | A kind of gelation coating particles profile control agent and its online preparation method and use method |
| CN108504341B (en) * | 2018-04-17 | 2020-11-10 | 中国海洋石油集团有限公司 | Gelled coated particle profile control agent and online preparation and use method thereof |
| CN108641692A (en) * | 2018-04-23 | 2018-10-12 | 中国地质大学（北京） | A kind of phenolic resin liquid rubber plug and its application |
| CN108641692B (en) * | 2018-04-23 | 2019-05-17 | 中国地质大学（北京） | A kind of phenolic resin liquid rubber plug and its application |
| CN113388382A (en) * | 2020-03-12 | 2021-09-14 | 中国石油天然气股份有限公司 | Polymer modified bentonite foam stabilizer and preparation method thereof |
| CN113388382B (en) * | 2020-03-12 | 2022-10-04 | 中国石油天然气股份有限公司 | Polymer modified bentonite foam stabilizer and preparation method thereof |
| CN111410945A (en) * | 2020-03-24 | 2020-07-14 | 中国石油天然气股份有限公司 | Capsule temporary plugging well killing fluid and preparation method thereof |
| CN114163984A (en) * | 2021-12-13 | 2022-03-11 | 西南石油大学 | Selection of selective water shutoff agent for oil well and water shutoff method |
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