CN107722957A - A kind of Application of weak gel profile agent based on cleaning fracturing outlet liquid - Google Patents
A kind of Application of weak gel profile agent based on cleaning fracturing outlet liquid Download PDFInfo
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- CN107722957A CN107722957A CN201711003885.0A CN201711003885A CN107722957A CN 107722957 A CN107722957 A CN 107722957A CN 201711003885 A CN201711003885 A CN 201711003885A CN 107722957 A CN107722957 A CN 107722957A
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- Prior art keywords
- fracturing outlet
- outlet liquid
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- cleaning
- weak gel
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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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/5083—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/516—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls characterised by their form or by the form of their components, e.g. encapsulated material
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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
Abstract
The invention discloses a kind of Application of weak gel profile agent based on cleaning fracturing outlet liquid, its mass percent composition is：PAMC 0.3~0.5%, methenamine 0.05%~0.1%, oxalic acid 0.005%~0.02%, phenol 0.05%~0.1%, resorcinol 0.01%~0.04%, sodium carbonate 0.01%~0.05%, stabilizer 0.01%~0.02%, remaining is cleaning fracturing outlet liquid.The present invention uses the Weak Gels salt resistance of cleaning fracturing outlet liquid preparation, stability good, sealing ratiod reaches more than 90%, profile improvement rate reaches more than 85%, with stronger profile control plugging effect, displacement of reservoir oil rate improves 14.8%~38.7%, for medium temperature transfer drive, fracturing outlet liquid processing pressure can be alleviated, realize comprehensive utilization target.
Description
Technical field
The invention belongs to the utilization technology field that oil gas field production clean fracturing fluid returns discharge opeing, and in particular to Yi Zhongli
The Application of weak gel profile agent prepared with cleaning fracturing outlet liquid.
Background technology
The wide variety of aqueous fracturing fluid in domestic and international oil field can be divided into natural and synthesis plant gum fracturing fluid, cellulose pressure break
Liquid, the type of polymer fracturing fluid 3.Contain a large amount of residues in above-mentioned several system pressure break breaking glue solutions, reduce in-place permeability,
Influence fracturing effect.
Clean fracturing fluid rheological characteristic is good, prop-carrying capacity is strong, good without residue, flowback effect, can be in purpose in pressing crack construction
Oil-gas Layer causes more preferably fracture length, keeps higher fracture condudtiviy after pressure break, can both improve the recovery ratio of Oil/gas Well,
The injury to stratum can be reduced again.
Pressure break terminates a large amount of fracturing outlet liquids of rear reversal.The main methods of fracturing outlet liquid include：Solidification method, change
Learn Coagulation Method, chemical oxidization method, high-level oxidation technology, micro-electrolysis method, electrode method, absorption method and bioanalysis.
Fracturing outlet liquid handling process is comparatively laborious, and processing equipment is complicated, investment is big, and medicament expends excessive, processing cost
It is too high；The wastewater treatment cycle is long, treating capacity is smaller, it is difficult to adapts to field operation.
For high salinity, high chloride ion, high COD, high pollution fracturing outlet liquid waste liquid, some contamination indexs have been difficult to
Full up sufficient state sewage emission standard, easily causes secondary pollution；Fracturing outlet liquid complicated component, system are changeable, do not form one
Fixed and perfect handling process is covered to deal with all or most types of waste liquid.
Clean fracturing fluid is mainly made up of viscoelastic surfactant and other additives.It is returned in discharge opeing containing a certain amount of
Surfactant, fracturing outlet liquid has the characteristics that viscosity is big, has the potential quality as profile control agent.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of Application of weak gel profile agent based on cleaning fracturing outlet liquid.
Application of weak gel profile agent is prepared by the raw material of following percent mass proportionings used by solving the above problems：Sun from
Sub- polyacrylamide 0.2%~0.6%, methenamine 0.03%~0.12%, oxalic acid 0.003%~0.025%, phenol
0.02%~0.12%, resorcinol 0.005%~0.05%, alkali 0.01%~0.05%, stabilizer 0.01%~0.03%,
Remaining is cleaning fracturing outlet liquid.
Application of weak gel profile agent of the invention based on cleaning fracturing outlet liquid is preferably by the raw material system of following percent mass proportionings
It is standby to form：PAMC 0.3%~0.5%, methenamine 0.05%~0.1%, oxalic acid 0.005%~
0.02%th, phenol 0.05%~0.1%, resorcinol 0.01%~0.04%, alkali 0.01%~0.05%, stabilizer 0.01%
~0.02%, remaining is cleaning fracturing outlet liquid.
The cationic degree 10%~20% of above-mentioned PAMC, molecular weight are 1000~15,000,000.
Above-mentioned stabilizer is sodium sulfite or thiocarbamide.
Above-mentioned alkali is any one in sodium carbonate, potassium carbonate, sodium hydroxide, potassium hydroxide.
The preparation method of the Application of weak gel profile agent based on cleaning fracturing outlet liquid of the invention is：Match somebody with somebody according to above-mentioned quality percentage
Than adding PAMC into cleaning fracturing outlet liquid, stirring 60~120min post curing 24h, then add crow
Lip river tropine, oxalic acid, phenol, resorcinol, sodium carbonate, stabilizer, be well mixed, at 60~80 DEG C constant temperature stand 72~
120h, obtain Application of weak gel profile agent.
The present invention prepares Application of weak gel profile agent, cleaning fracturing outlet liquid and cation polypropylene using cleaning fracturing outlet liquid
Acid amides compatibility is good, methenamine (60~80 DEG C) generation formaldehyde, Ran Houjia under acid medium Catalyzed by Oxalic Acid heating condition
Aldehyde and phenol, resorcin reaction generation hydroxymethylphenol, amide groups and formaldehyde, hydroxyl first in partial cation polyacrylamide
Condensation cross-linking reaction occurs under 60~80 DEG C of medium temperature conditions for base phenol and the relatively low phenolic resin of molecular mass, is formed weak solidifying
Glue profile control agent.
Application of weak gel profile agent salt resistance of the present invention, stability are good, placed under medium temperature the viscosity conservation rate of 30 days for 75% with
On, sealing ratiod reaches more than 90%, and profile improvement rate reaches more than 85%, has stronger profile control plugging effect, and displacement of reservoir oil rate carries
It is high by 14.8%~38.7%, it can avoid fluctuating larger, the larger influence to caused by gel-forming of salinity deviation with liquid pH, use
In medium temperature transfer drive, oil recovery factor is both remarkably improved, a large amount of fracturing outlet liquid processing pressures can be alleviated again, realize clean fracturing
Return discharge opeing and turn waste into wealth, green target.
Brief description of the drawings
Fig. 1 is the stability of the Application of weak gel profile agent of embodiment 1~3.
Embodiment
The present invention is described in more detail with reference to the accompanying drawings and examples, but protection scope of the present invention is not limited only to
These embodiments.
Embodiment 1
1000mL cleaning fracturing outlet liquids (salinity 20000mg/L, pH 6.5, suspension 1200mg/L) are taken, are added
Into 1000ml port grinding bottle；Then add 3g cationic degrees be 20%, the PAMC that molecular weight is 12,000,000,
120min is stirred, dissolves complete post curing 24h；0.7g methenamines, 0.2g oxalic acid, 0.7g benzene are slowly added under stirring condition
Phenol, 0.2g resorcinols, 0.3g sodium carbonate, 0.2g thiocarbamides, constant temperature 96h in 60 DEG C of baking ovens is put into after sealing, obtains weak gel profile
Drive agent.
Embodiment 2
1000mL cleaning fracturing outlet liquids (salinity 20000mg/L, pH 6.5, suspension 1200mg/L) are taken, are added
Into 1000ml port grinding bottle；Then add 3g cationic degrees be 20%, the PAMC that molecular weight is 12,000,000,
120min is stirred, dissolves complete post curing 24h；0.7g methenamines, 0.2g oxalic acid, 0.7g benzene are slowly added under stirring condition
Phenol, 0.2g resorcinols, 0.3g sodium carbonate, 0.2g thiocarbamides, constant temperature 96h in 70 DEG C of baking ovens is put into after sealing, obtains weak gel profile
Drive agent.
Embodiment 3
1000mL cleaning fracturing outlet liquids (salinity 20000mg/L, pH 6.5, suspension 1200mg/L) are taken, are added
Into 1000ml port grinding bottle；Then add 3g cationic degrees be 20%, the PAMC that molecular weight is 12,000,000,
120min is stirred, dissolves complete post curing 24h；0.7g methenamines, 0.2g oxalic acid, 0.7g benzene are slowly added under stirring condition
Phenol, 0.2g resorcinols, 0.3g sodium carbonate, 0.2g thiocarbamides, constant temperature 96h in 80 DEG C of baking ovens is put into after sealing, obtains weak gel profile
Drive agent.
Embodiment 4
1000mL cleaning fracturing outlet liquids (salinity 50000mg/L, pH 6.35, suspension 1050mg/L) are taken, are added
Enter into 1000ml port grinding bottle；Then add 5g cationic degrees be 20%, the cation polypropylene acyl that molecular weight is 12,000,000
Amine, 120min is stirred, dissolves complete post curing 24h；0.5g methenamines, 0.05g oxalic acid, 0.5g are slowly added under stirring condition
Phenol, 0.1g resorcinols, 0.1g sodium carbonate, 0.1g thiocarbamides, constant temperature 96h in 80 DEG C of baking ovens is put into after sealing, obtains Weak Gels
Profile control agent.
Embodiment 5
1000mL cleaning fracturing outlet liquids (salinity 80000mg/L, pH 6.67, suspension 1150mg/L) are taken, are added
Enter into 1000ml port grinding bottle；Then add 4g cationic degrees be 20%, the cation polypropylene acyl that molecular weight is 12,000,000
Amine, 120min is stirred, dissolves complete post curing 24h；1.0g methenamines, 0.1g oxalic acid, 1.0g are slowly added under stirring condition
Phenol, 0.4g resorcinols, 0.5g sodium carbonate, 0.2g thiocarbamides, constant temperature 96h in 70 DEG C of baking ovens is put into after sealing, obtains Weak Gels
Profile control agent.
Embodiment 6
1000mL cleaning fracturing outlet liquids (salinity 100000mg/L, pH 6.85, suspension 1320mg/L) are taken, are added
Enter into 1000ml port grinding bottle；Then add 2g cationic degrees be 20%, the cation polypropylene acyl that molecular weight is 12,000,000
Amine, 120min is stirred, dissolves complete post curing 24h；0.3g methenamines, 0.25g oxalic acid, 0.1g are slowly added under stirring condition
Phenol, 0.5g resorcinols, 0.5g sodium carbonate, 0.3g thiocarbamides, constant temperature 96h in 80 DEG C of baking ovens is put into after sealing, obtains Weak Gels
Profile control agent.
In order to prove beneficial effects of the present invention, inventor has carried out substantial amounts of laboratory research experiment, has specifically tested feelings
Condition is as follows：
1st, Application of weak gel profile agent salt resistant character is tested
The cleaning pressure that 1000mL salinities are 20000mg/L, 50000mg/L, 80000mg/L, 100000mg/L is taken respectively
Split and return discharge opeing, then add 3g cationic degrees be 20%, the PAMC that molecular weight is 12,000,000, stirring
120min, dissolve complete post curing 24h；Be slowly added under stirring condition 0.7g methenamines, 0.2g oxalic acid, 0.7g phenol,
0.2g resorcinols, 0.3g sodium carbonate, 0.2g thiocarbamides, constant temperature 96h in 60 DEG C of baking ovens is put into after sealing.Result of the test is shown, is adopted
Weak Gels can be formed with the cleaning fracturing outlet liquid of different salinities.By cleaning fracturing outlet liquid salinity from small to large
The viscosity of the Weak Gels of formation is followed successively by 8500mPas, 8920mPas, 9210mPas, 9540mPas, illustrates this hair
Bright Application of weak gel profile agent salt resistant character is strong.
2nd, the heat stability testing of Application of weak gel profile agent
Application of weak gel profile agent prepared by embodiment 1~3 continues viscosimetric after constant temperature is placed 30 days, as a result sees Fig. 1.From figure
1 understands that as standing time extends after plastic, viscosity has declined, the viscosity conservation rate after 30 days at 60 DEG C, 70 DEG C, 80 DEG C
86.4%, 81.9%, 76% is respectively reached, can ensure that Weak Gels have higher glue in the long period at the formation temperature
Degree, be advantageous to expand swept volume, improve oil recovery factor.
3rd, the section of Application of weak gel profile agent improves ability
Carrying out profile control using core flow test device improves testing experiment.Weak Gels are in the different infiltrations in stratum different layers position
Shut-off capacity under rate is differential, is evaluated with profile improvement rate.Simulation stratum condition, by the different rock core of two permeabilities simultaneously
Connection, the profile control agent (uncrosslinked) of injection 0.5PV embodiments 3, places 96h at 80 DEG C, and height before and after transfer drive is determined after forming gel
The water absorption of less permeable layer, can calculate section improves situation, and result of the test is shown in Table 1.
The Weak Gels section of table 1 improves aptitude tests result
As can be seen from Table 1, when the rock core parallel connection of different permeabilities, Weak Gels that the larger rock core of permeability enters compared with
More, sealing ratiod is higher；Water seldom enters Low Permeable Cores before note profile control agent；After injecting profile control agent, into Low Permeable Cores
Water showed increased.Illustrate that profile control agent of the present invention can improve the assignment of traffic of height permeable layer very well, there is certain selection
Property shut-off capacity, section improve ability more than 85%.
4th, the oil-displacement capacity of Application of weak gel profile agent
Oil displacement test is carried out using core flow test device.Weak Gels stratum different layers position oil-displacement capacity, with simultaneously
Total raising oil displacement efficiency of connection rock core is evaluated.Simulation stratum condition, the different rock core of two permeabilities is in parallel, constant
With simulated formation water drive to not fuel-displaced under flow；The profile control agent (uncrosslinked) of 0.5PV embodiments 3 is injected, is placed at 80 DEG C
96h, continue water drive under same traffic to not fuel-displaced.The displacement of reservoir oil rate before and after injection profile control agent is calculated, total displacement of reservoir oil can be calculated and carried
High rate, result of the test are shown in Table 2.
The oil-displacement capacity of the Weak Gels of table 2
As shown in Table 2, when the rock core parallel connection of different permeabilities, in the differential lower water drive of high permeability, less permeable layer is difficult
Employ, employ high permeability zone completely.Oil displacement efficiency can be improved after injection profile control agent, and when permeability grade is larger, injection is adjusted
The raising value of total oil displacement efficiency is bigger after drive agent.Illustrate that profile control agent preferentially enters high permeability formation, it is effectively sealed
Stifled, Low Permeable Cores, raising oil displacement efficiency can more be entered by causing to be subsequently implanted into water；And permeability grade is bigger, enter
The gel content of high permeability rock core is more, and its plugging effect is better, and the ability of improving ecology sweep efficiency is stronger, and oil displacement efficiency carries
High level is bigger.
Claims (5)
1. a kind of Application of weak gel profile agent based on cleaning fracturing outlet liquid, it is characterised in that the Application of weak gel profile agent is by following quality
The raw material of per distribution ratio is prepared：PAMC 0.2%~0.6%, methenamine 0.03%~0.12%, grass
Acid 0.003%~0.025%, phenol 0.02%~0.12%, resorcinol 0.005%~0.05%, alkali 0.01%~
0.05%th, stabilizer 0.01%~0.03%, remaining is cleaning fracturing outlet liquid.
2. the Application of weak gel profile agent according to claim 1 based on cleaning fracturing outlet liquid, it is characterised in that the Weak Gels
Profile control agent is prepared by the raw material of following percent mass proportionings：PAMC 0.3%~0.5%, methenamine
0.05%~0.1%, oxalic acid 0.005%~0.02%, phenol 0.05%~0.1%, resorcinol 0.01%~0.04%, alkali
0.01%~0.05%, stabilizer 0.01%~0.02%, remaining is cleaning fracturing outlet liquid.
3. the Application of weak gel profile agent according to claim 1 or 2 based on cleaning fracturing outlet liquid, it is characterised in that：It is described
The cationic degree 10%~20% of PAMC, molecular weight are 1000~15,000,000.
4. the Application of weak gel profile agent according to claim 1 or 2 based on cleaning fracturing outlet liquid, it is characterised in that：It is described
Stabilizer be sodium sulfite or thiocarbamide.
5. the Application of weak gel profile agent according to claim 1 or 2 based on cleaning fracturing outlet liquid, it is characterised in that：It is described
Alkali be sodium carbonate, potassium carbonate, sodium hydroxide, any one in potassium hydroxide.
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| CN201711003885.0A CN107722957A (en) | 2017-10-24 | 2017-10-24 | A kind of Application of weak gel profile agent based on cleaning fracturing outlet liquid |
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| CN201711003885.0A CN107722957A (en) | 2017-10-24 | 2017-10-24 | A kind of Application of weak gel profile agent based on cleaning fracturing outlet liquid |
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Cited By (3)
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| CN109401740A (en) * | 2018-12-24 | 2019-03-01 | 陕西明德石油科技有限公司 | Oil field composite modified resin is crosslinked strong gel water-plugging profile control agent |
| CN115305071A (en) * | 2021-05-08 | 2022-11-08 | 中国石油天然气股份有限公司 | Phenolic aldehyde system weak gel profile control and flooding agent, modifier and preparation method thereof |
| CN116218497A (en) * | 2023-02-22 | 2023-06-06 | 中国石油化工股份有限公司 | Gel profile control composition, gel profile control agent and application thereof |
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