CN104234676B - Method for deep profile control by utilizing ASP (alkaline/surfactant/polymer) combination flooding produced sewage - Google Patents
Method for deep profile control by utilizing ASP (alkaline/surfactant/polymer) combination flooding produced sewage Download PDFInfo
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- CN104234676B CN104234676B CN201410432759.7A CN201410432759A CN104234676B CN 104234676 B CN104234676 B CN 104234676B CN 201410432759 A CN201410432759 A CN 201410432759A CN 104234676 B CN104234676 B CN 104234676B
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- combination flooding
- cationic polyelectrolyte
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- extraction sewage
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Abstract
The invention provides a method for deep profile control by utilizing ASP (alkaline/surfactant/polymer) combination flooding produced sewage, and belongs to the technical field of oilfield enhanced oil production. The method comprises the following steps that ASP combination flooding produced sewage is injected into an oil deposit stratum, a cationic polyelectrolyte solution is injected into the oil deposit stratum, cationic polyelectrolyte is epoxy chloropropane-amine polycondensate or dimethyl diallyl ammonium chloride polymers, the injection volume of the cationic polyelectrolyte solution accounts for 0.5 percent to 5 percent of the volume of the injected ASP combination flooding produced sewage, and a viscoelastic gel type profile control agent is generated. The method has the advantages that the cationic polyelectrolyte and various chemical agents in the sewage take reactions such as electrical neutralization, flocculation and crosslinking, and the viscoelastic gel type profile control agent is generated, so the oil production increasing and water reduction and the efficient treatment and reutilization of the ASP combination flooding produced sewage are realized through deep profile control on the ASP combination flooding produced sewage, in addition, the cost of sewage treatment equipment and agentia is greatly reduced, and the popularization and the application of an ASP combination flooding technology are promoted.
Description
Technical field
The present invention relates to a kind of method utilizing ternary combination flooding extraction sewage to carry out deep profile controlling, belong to oil field strengthening and adopt
Oil tech field.
Background technology
Ternary composite driving utilizes the compound system of alkali, surfactant and polyacrylamide can significantly carry as oil displacement agent
High oil recovery factor, is the important tertiary oil recovery technology of high water cut oil field development late stage, strong base ternary composite driving therein and weak
Alkali ternary composite driving technology is all achieved with preferable development effectiveness.
But field test shows, owing to ternary combination flooding extraction sewage containing big weight polyacrylamide, anionic surface
Activating agent, alkali and oil emulsion, sewage disposal difficulty is very big, and sewage with oil and suspended solid often do not reach re-injection index.
Tables 1 and 2 is the trace analysis result of four ternary produced water treatment experimental station sewage fundamental propertys.Can see
Going out, when in ternary composite flooding water extraction, the concentration of polymer gradually rises to 1000mg/L, surfactant concentration can be corresponding
Be increased to 80mg/L, cause oil content and suspended solids content to exceed standard.
The each stage characteristic in table 1 strong base ternary produced water treatment station
The each stage characteristic in table 2 weak base ternary produced water treatment station
Why ternary composite flooding water extraction is difficult to processes, mainly due to the impact remaining a large amount of chemical agent in sewage.
Wherein, the effect such as the absorption of anionic acrylamide causes the sterically hindered increase between oil droplet and suspended solid, electrostatic repulsion forces
Increasing, coalescence difficulty, also result in sewage viscosity and increase, oil droplet floating slows with suspended solid sedimentation.Surfactant
The effect such as absorption cause the surface tension of oil droplet and suspended solid to reduce, electrostatic repulsion increases, emulsion stability enhancing.Alkali makes
PH value of sewage water increases, and corrosion stratum makes incrustation ion concentration in water increase, and scaling tendency strengthens, and suspended solids content increases.
Summary of the invention
The present invention solves in existing ternary composite flooding water extraction containing big weight polyacrylamide, anion surface active
The problem of the chemical agents such as agent, alkali and oil emulsion, and then propose one and utilize ternary combination flooding extraction sewage to carry out deep profile controlling
Method, specifically include following technical scheme:
A kind of method utilizing ternary combination flooding extraction sewage to carry out deep profile controlling, described method includes:
Described ternary combination flooding extraction sewage is injected to reservoir formation；
Injecting cationic polyelectrolyte solution in described reservoir formation, described cationic polyelectrolyte is epoxy chloropropionate
Alkane-amine condensation polymer or dimethyl diallyl ammonium chloride polymer, the injected slurry volume of described cationic polyelectrolyte solution is note
Enter the 0.5%～5% of described ternary combination flooding extraction sewage volume, generate and there is viscoelastic gel-type profile control agent.
The molecular weight of cationic polyelectrolyte of the present invention is 500-10000, described cationic polyelectrolyte concentration
It is 1%～20%.
Epoxychloropropane of the present invention-amine condensation polymer has a following structure:
R1 and R2 is respectively the alkyl of carbon number >=1, and n value is 3～200.
Epoxychloropropane of the present invention-amine condensation polymer includes epichlorohydrin-dimethylamine condensation polymer, epoxy chloropropionate
Alkane-dimethylamine-ethylenediamine condensation polymer or epoxychloropropane-diethylamine condensation polymer.
Dimethyl diallyl ammonium chloride polymer of the present invention includes dimethyl diallyl ammonium chloride homopolymer
Or dimethyl diallyl ammonium chloride-acrylamide copolymer.
Containing partially hydrolyzed polyacrylamide (PHPA), surfactant, breast in ternary combination flooding extraction sewage of the present invention
Carburetion and float.
In terms of the weight of ternary combination flooding extraction sewage of the present invention, the concentration of described partially hydrolyzed polyacrylamide (PHPA)
Scope is 200-1000mg/L.
Method of the present invention injects additive while being additionally included in the cationic polyelectrolyte injecting predetermined concentration
Step, described additive includes at least one in zinc sulfate, zinc chloride, aluminum chloride, aluminum sulfate or aluminium polychlorid, described
The implantation quality of additive is 1:1～1:5 with the mass ratio of described polyelectrolyte.
In sum, the present invention, by by ternary combination flooding extraction sewage re-injection reservoir formation, is then injected into cation and gathers
Electrolyte, makes the chemistry such as PAMA, anion surfactant and oil emulsion in cationic polyelectrolyte and sewage
Agent generation charge neutrality, flocculate, the reaction such as crosslinking, generate and there is viscoelastic gel-type profile control agent, thus by tri compound
Drive extraction sewage carries out deep profile controlling to realize oil increasing precipitation and efficiently processing and recycling ternary combination flooding extraction sewage,
And significantly reduce sewage disposal device and medicament cost savings production cost, promote the popularization of ternary composite driving technology
Application.
Accompanying drawing explanation
The polyelectrolyte that Fig. 1 provides for this detailed description of the invention makes polyacrylamide amine molecule crosslink by positive charged group
The principle schematic of reaction.
Detailed description of the invention
This detailed description of the invention is to be clearly and completely described technical scheme, and embodiment therein is only
It is only a part of embodiment of the present invention, and is not whole embodiments.Based on the embodiment in the present invention, art technology
Personnel broadly fall into the protection model of the present invention at other embodiments all not obtained on the premise of creative work
Enclose.
This detailed description of the invention provides a kind of method utilizing ternary combination flooding extraction sewage to carry out deep profile controlling, accordingly
Method include:
Step 1, to reservoir formation inject described ternary combination flooding extraction sewage.
Concrete, containing partially hydrolyzed polyacrylamide (PHPA) HPAM, surface activity in corresponding ternary combination flooding extraction sewage
Agent, oil emulsion, float etc., the concentration range of described HPAM is 200-1000mg/L.
Step 2, in described reservoir formation, inject the cationic polyelectrolyte of predetermined concentration, generate have viscoelastic solidifying
Glue-type profile control agent.
Concrete, corresponding cationic polyelectrolyte can include epoxychloropropane-amine condensation polymer or dimethyl two allyl
Ammonium chloride polymer.
Corresponding epoxychloropropane-amine condensation polymer can use epichlorohydrin-dimethylamine condensation polymer, epoxychloropropane-two
Methylamine-ethylenediamine condensation polymer or epoxychloropropane-diethylamine condensation polymer.The molecular weight of corresponding epoxychloropropane-amine condensation polymer
For 500-10000, and ionize with positive charge in water.Corresponding dimethyl diallyl ammonium chloride polymer can use two
Methyl diallyl ammonium chloride homopolymer or dimethyl diallyl ammonium chloride-acrylamide copolymer.
Corresponding epoxychloropropane-amine condensation polymer is generally of following molecular structure:
R1 and R2 therein be carbon number >=alkyl.
And corresponding epichlorohydrin-dimethylamine condensation polymer can have a following structure:
While the corresponding cationic polyelectrolyte injecting predetermined concentration, it is also possible to inject and include zinc sulfate, chlorination
The additive of at least one in zinc, aluminum chloride, aluminum sulfate or aluminium polychlorid, the Main Function of additive is to strengthen cation
The charge neutrality ability of polyelectrolyte, thus reduce reagent cost.
The work of the method that ternary combination flooding extraction sewage carries out deep profile controlling that what this detailed description of the invention provided utilize is former
Reason includes: with the group of multiple positively chargeds on cationic polyelectrolyte strand, and gathering in ternary combination flooding extraction sewage
Then having a large amount of electronegative hydroxy-acid group on acrylamide molecules chain, polyelectrolyte makes polyacrylamide amine molecule by positive charged group
Crosslinking reaction, form build gel, reaction principle is as shown in Figure 1.Polyacrylamide gel gradually forms, along with poly-
Electrolyte concentration increases, and the turbidity of system is gradually increased, and the polyacrylamide gel particles now formed is the most tiny, works as polyelectrolyte
Concentration when reaching marginal value, polyacrylamide just can form big gel.On the other hand, ternary combination flooding extraction sewage carries
The surfactant of negative electricity, oil emulsion, suspended solid etc. and polyelectrolyte generation charge neutrality, bridge formation, generate flco, these flcos
Forming process is reacted with polyacrylamide gel and is produced simultaneously, and flco and gel are bundled together generation gel-type profile control agent.
Below by specific embodiment, ternary combination flooding extraction sewage is utilized to carry out deep profile controlling offer of the present invention
Method be described in detail.
Embodiment 1
Corresponding cationic polyelectrolyte selects epichlorohydrin-dimethylamine condensation polymer (EPI-DMA), and is made into the denseest
The aqueous solution of degree, joins in the on-the-spot ternary combination flooding extraction sewage that HPAM concentration is 800mg/L, and stirring, solution gradually becomes
Muddiness, ultimately forms and has viscoelastic gel profile control agent.
As seen from Table 3, when EPI-DMA (can be made into the solution that mass concentration is 2% during use) is in ternary composite driving extraction
When concentration in sewage is less than marginal value 400mg/L, turbidity of sewage gradually rises, and Zeta potential is gradually shuffled.Concentration reaches to face
During dividing value, form gel.Concentration continues to raise, and system change is little.
The impact on system plastic of the table 3 EPI-DMA concentration
| Numbering | EPI-DMA concentration (mg/L) | Turbidity of sewage (NTU) | Zeta potential (mv) | System changes |
| 1 | 0 | 89.5 | -41.2 | Turbid solution |
| 2 | 100 | 124.6 | -36.4 | Turbidity increases |
| 3 | 200 | 213.8 | -30.6 | Turbidity increases |
| 4 | 300 | 387.0 | -23.2 | Turbidity increases |
| 5 | 400 | 25.4 | 2.3 | Generate gel |
| 6 | 500 | 25.8 | 2.7 | Without significant change |
As seen from Table 4, within the temperature range of 25～45 DEG C, add the polyelectrolyte of 400mg/L, all can form gel,
Therefore temperature is little on the impact of system plastic.
The impact on system plastic of table 4 temperature
Table 5 is the fill out sand tube flowing experiment result of profile control system.Experiment uses long 50.0cm, internal diameter to be the back-up sand of 2.5cm
Pipe.By parallel core evacuation, saturation water respectively, calculate porosity, inject formation water and measure rock core effective permeability, then depend on
Fill out sand tube two ends are sealed tight, keep at 45 DEG C by secondary injection ternary combination flooding extraction sewage, EPI-DMA solution in rock core
12h, reinjects formation water displacement parallel core, measures rock core effective permeability.It can be seen that profile control system is to high less permeable layer
The adjustment of intake profile can play significantly effect.
Table 5 fill out sand tube flow test in parallel
Note: production fluid Volume fraction is the ratio of high permeability zone production fluid volume fraction and less permeable layer
Embodiment 2
Corresponding cationic polyelectrolyte selects epichlorohydrin-dimethylamine condensation polymer (EPI-DMA), corresponding additive
Selecting zinc sulfate, (mass concentration of EPI-DMA is 2%, and the addition of zinc sulfate is all to be made into whose solution certain density
150mg/L), joining in the on-the-spot ternary combination flooding extraction sewage that HPAM concentration is 800mg/L, stirring, solution gradually becomes muddy
Turbid, ultimately form and there is viscoelastic gel profile control agent.
As seen from Table 6, when in sewage, HPAM concentration is 800mg/L, add 300mg/L EPI-DMA polyelectrolyte and
The ZnSO of 150mg/L4, gel can be formed.
The impact on system plastic of table 6 additive
In sum, the present invention, by by ternary combination flooding extraction sewage re-injection reservoir formation, is then injected into cation and gathers
Electrolyte, makes the chemistry such as PAMA, anion surfactant and oil emulsion in cationic polyelectrolyte and sewage
Agent generation charge neutrality, flocculate, the reaction such as crosslinking, generate and there is viscoelastic gel-type profile control agent, thus by tri compound
Drive extraction sewage carries out deep profile controlling to realize oil increasing precipitation and efficiently processing and recycling ternary combination flooding extraction sewage,
And significantly reduce sewage disposal device and medicament cost savings production cost, promote the popularization of ternary composite driving technology
Application.
The foregoing is only illustrative, rather than be restricted person.Any spirit and scope without departing from the present invention, and to it
The equivalent modifications carried out or change, all should be included in claim.
Claims (6)
1. one kind utilizes the method that ternary combination flooding extraction sewage carries out deep profile controlling, it is characterised in that described method includes:
Described ternary combination flooding extraction sewage is injected to reservoir formation；
Injecting cationic polyelectrolyte solution in described reservoir formation, described cationic polyelectrolyte is epoxychloropropane-amine
Condensation polymer or dimethyl diallyl ammonium chloride polymer, the injected slurry volume of described cationic polyelectrolyte solution is described for injecting
The 0.5%～5% of ternary combination flooding extraction sewage volume, generates and has viscoelastic gel-type profile control agent；
The molecular weight of described cationic polyelectrolyte is 500-10000, and the concentration of described cationic polyelectrolyte solution is 1-
20%；
The method injects the step of additive, described interpolation while being additionally included in the cationic polyelectrolyte injecting predetermined concentration
Agent includes at least one in zinc sulfate, zinc chloride, aluminum chloride, aluminum sulfate or aluminium polychlorid, the injection matter of described additive
Amount is 1:1～1:5 with the mass ratio of described polyelectrolyte.
Utilize the method that ternary combination flooding extraction sewage carries out deep profile controlling the most as claimed in claim 1, it is characterised in that institute
State epoxychloropropane-amine condensation polymer and there is following structure:
R1 and R2 is respectively the alkyl of carbon number >=1, and n value is 3～200.
Utilizing the method that ternary combination flooding extraction sewage carries out deep profile controlling the most as claimed in claim 1 or 2, its feature exists
In, described epoxychloropropane-amine condensation polymer includes epichlorohydrin-dimethylamine condensation polymer, epichlorohydrin-dimethylamine-second two
Amine condensation polymer or epoxychloropropane-diethylamine condensation polymer.
Utilize the method that ternary combination flooding extraction sewage carries out deep profile controlling the most as claimed in claim 1, it is characterised in that institute
State dimethyl diallyl ammonium chloride polymer and include dimethyl diallyl ammonium chloride homopolymer or dimethyl diallyl chlorine
Change ammonium-acrylamide copolymer.
Utilize the method that ternary combination flooding extraction sewage carries out deep profile controlling the most as claimed in claim 1, it is characterised in that institute
State in ternary combination flooding extraction sewage containing partially hydrolyzed polyacrylamide (PHPA), surfactant, oil emulsion and float.
Utilize the method that ternary combination flooding extraction sewage carries out deep profile controlling the most as claimed in claim 5, it is characterised in that with
The weight meter of described ternary combination flooding extraction sewage, the concentration range of described partially hydrolyzed polyacrylamide (PHPA) is 200-1000mg/
L。
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| CN106044879B (en) * | 2016-07-07 | 2019-06-28 | 中国海洋石油集团有限公司 | A method of improving macromolecule transfer drive system injection |
| CN106281270A (en) * | 2016-07-26 | 2017-01-04 | 中国石油天然气股份有限公司 | A kind of cross-linking water plugging profile control agent of low cost flocculation-type |
| CN113234425B (en) * | 2021-04-09 | 2023-02-28 | 中国石油大学(华东) | Composite aluminum gel plugging agent for deep profile control of medium-low permeability oil reservoir and preparation method and application thereof |
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| CN100587021C (en) * | 2006-06-27 | 2010-02-03 | 中国石化股份胜利油田分公司孤岛采油厂 | Preparation of shift drive agent of self cross-linked polymer and application method |
| CN100537455C (en) * | 2006-08-15 | 2009-09-09 | 中国石油天然气股份有限公司 | Ternary combination flooding produced liquid oil-containing sewage treatment technique |
| FR2938842B1 (en) * | 2008-11-27 | 2012-09-21 | Snf Sas | NOVEL PROCESS FOR THE PREPARATION OF ACRYLAMIDE COPOLYMERS BY HOFMANN DEGRADATION REACTION |
| CN102174317A (en) * | 2011-03-09 | 2011-09-07 | 大庆润海科技发展有限公司 | Profile control agent suitable for ASP flooding |
| CN102850480B (en) * | 2011-06-30 | 2014-08-27 | 中国石油化工股份有限公司 | Polymer and its preparation method and application, and processing method for oily sewage |
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