CN106479472A - A kind of fracturing fluid and preparation method thereof - Google Patents
A kind of fracturing fluid and preparation method thereof Download PDFInfo
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- CN106479472A CN106479472A CN201610766900.6A CN201610766900A CN106479472A CN 106479472 A CN106479472 A CN 106479472A CN 201610766900 A CN201610766900 A CN 201610766900A CN 106479472 A CN106479472 A CN 106479472A
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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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/68—Compositions based on water or polar solvents containing organic compounds
- C09K8/685—Compositions based on water or polar solvents containing organic compounds containing cross-linking agents
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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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/887—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
Abstract
The invention provides a kind of fracturing fluid, including base fluid and crosslinking agent, the base fluid includes following components：By weight percentage, 0.3% 0.4% thickening agents, 0.2% 2% sulfur eliminations, 0.1% 0.2% screeners, 0.1% 0.2% environmental protection bactericide, 0.3 0.5% clay stabilizers, 0.3% 0.4% cleanup additives, balance of water, the mass ratio of the base fluid and crosslinking agent is 100:0.3 1, the fracturing fluid has unique anti-salt property, disclosure satisfy that high salinity production water Quick cross-linking takes sand, with good temperature and shearing sustainability, outstanding grittiness can be strong, breaks glue thoroughly, and the impact of fracture flow conductivity is little, while water utilization rate is improve, reservoir reconstruction requirement within disclosure satisfy that 100 DEG C.
Description
Technical field
The present invention relates to oil-gas field fracturing technical field, and in particular to a kind of fracturing fluid and preparation method thereof.
Background technology
China's overwhelming majority oil field enters the stage of secondary, tertiary oil recovery at present, is generally improved using water filling supercharging
The recovery ratio of crude oil and oil field development efficiency.Therefore, on the one hand, in oil extraction process, substantial amounts of water source is needed to be noted
Water operation, so as to exacerbate the problem of water scarcity.On the other hand, the moisture content of oil field mining liquid is caused to rise year by year.Oil
Field production water refers to the water for wet crude being carried out processed and being separated by water-oil separating technique.Contain in production water
Some organic matters, bacterium, salt, various additives, and salinity is high, and outer discharge capacity is big, so unsuitable directly exhaust emission ring
Border.In recent years, it is contemplated that problem of both environmental protection and economic benefit, sewage disposal is carried out to oil produced water sharp again
With oil field is developed important strategic importance.It is current most domestic water preparing fracturing fluid to be produced using process
The direction of scholar's research, both can provide a kind of method for disposing polluted water in oil, while reduce fracturing work to freshwater resources again
Demand, reduce construction cost, realize the exploitation of oil field green economy.
Used plant gum fracturing fluid is prepared with clear water, and fracturing fluid enters stratum, with formation fluid compatibility
Difference, easily causes a series of quick reaction of water-sensitives, alkali, and extemporaneous preparation fracturing fluid needs substantial amounts of water resource, light for some
The region that water resource lacks, seriously constrains the efficiency of pressing crack construction, increases the cost of investment of manpower and materials.Given birth to using oil field
Produce the direct preparing fracturing fluid of water and alleviate above-mentioned contradiction.But produce high price mineral ion in water, bacterium, mechanical admixture, hang
Float content is generally significantly higher than regular industrial water, is directly dissolved in preparation guar gum fracturing fluid, viscous, layering can easily occur heavy
Form sediment, cannot be crosslinked, the problems such as dispergation is rapid, especially high price mineral ion is easily caused fracturing fluid viscosity rapid decrease.Therefore,
My company pointedly develops prepares plant gum fracturing fluid suitable for high salinity oil gas field production water, and fracturing fluid has uniqueness
Anti-salt property, within 80,000 being met salinity production water join liquid, can reduce routine fracturing fluid because change initial reservoir water environment
The injury for causing.
Content of the invention
In order to overcome, conventional fracturing fluid is easily putrid and deteriorated, salt resistant character is poor, viscosity reduction is rapid, the problem of reservoir compatibility difference,
The present invention proposes a kind of fracturing fluid and preparation method thereof.
A kind of fracturing fluid of offer is the technical scheme is that, including base fluid and crosslinking agent, the base fluid includes following groups
Point：By weight percentage, 0.3%-0.4% thickening agent, 0.2%-2% sulfur elimination, 0.1%-0.2% screener, 0.1%-
0.2% environmental protection bactericide, 0.3-0.5% clay stabilizer, 0.3%-0.4% cleanup additive, balance of water, the base fluid and crosslinking
The mass ratio of agent is 100:0.3-1.
The thickening agent is instant guar gum, and its preparation method is as follows：By the hydroxypropyl guar gum that mass percent is 30.3%
Add in flask, using mass percent as 42.4% ethanol as reaction medium, dropping mass percent is 9.1% mass concentration
25% sodium hydroxide solution carries out alkalizing swelling, stirs and is passed through nitrogen, be warming up to 60 DEG C, then be slowly added dropwise quality under normal temperature
Percentage be the solution of 18.2% mass fraction concentration 30%3- chlorine 2- hydroxypropyl-trimethyl ammonium chloride in ethanol, in the reaction
At a temperature of react 5h, be neutralized to pH=7～8 with glacial acetic acid after react, then washed with ethanol solution suction filtration, drying, crushing
Instant guar gum is obtained.
The sulfur elimination is FeCl3、ZnCl2、ZnSO4·7H2O、CuCl2, basic zinc carbonate, basic copper carbonate any one
Plant or arbitrarily compounding mixture in them or the aqueous solution.
The screener is five sodium of diethylene triamine pentamethylene phosphonic, ATMP, ATMP five
Sodium, ethylene diamine tetra methylene phosphonic acid sodium, five sodium of ethylene diamine tetra methylene phosphonic acid, hexapotassium, hexapotassium
Appoint in any one or they in the copolymer of six sylvite, organic phosphine carboxylic acid, 2- HPAA or phosphono-carboxylic acids
The mixture of meaning combination or the aqueous solution.
The environmental protection bactericide is dodecyl benzyl dimethyl ammonium chloride, DTAC, dodecane
Base dimethylbenzyl ammonium bromide, benzyl triphenyl phosphonium chloride phosphine, tetrahydroxy sulfuric acid phosphorus any one or in them arbitrarily compounding
Mixture or the aqueous solution.
The clay stabilizer be double (2- ethoxy) alkyl dimethyl ammonium chlorides with chlorination -2- ethoxy trimethylammonium in mass ratio
1:1 compound.
Preparing for the crosslinking agent is as follows：In the flask equipped with thermometer, water knockout drum and reflux condensing tube, sequentially add
Mass percent is 54.1% water, 5.6% triethanolamine, 21.4% boric acid and 1.7% NaOH, is warming up to 70 DEG C of stirrings anti-
1h is answered, boric acid complete hydrolysis are made, mass percent is subsequently adding for 17.2% ethylene glycol, is warming up to 120～130 DEG C, reaction 3～
4h can discharging.
A kind of preparation method of fracturing fluid, comprises the following steps：
Step 1) prepare following component：By weight percentage, 0.3%-0.4% thickening agent, 0.2%-2% sulphur removal
Agent, 0.1%-0.2% screener, 0.1%-0.2% environmental protection bactericide, 0.3-0.5% clay stabilizer, 0.3%-0.4% are helped
Row's agent, balance of water；
Step 2) by step 1) in the water that prepared add in Agitation Tank, then by step 1) in other components pump successively
Enter Agitation Tank, treat that liquid is mixed, form the base fluid of fracturing fluid；
Step 3) by step 2) in the base fluid for obtaining of institute and crosslinking agent with 100:The mass ratio of 0.3-1 is mixed to form pressure break
Liquid.
A kind of preparation method of fracturing fluid, comprises the following steps：
Step 1) prepare following component：By weight percentage, 0.3% thickening agent, 0.2% sulfur elimination, 0.1% shielding
Agent, 0.1% environmental protection bactericide, 0.3% clay stabilizer, 0.3% cleanup additive, 98.7% water；
Step 2) by step 1) in the water that prepared add in Agitation Tank, then by step 1) in other components pump successively
Enter Agitation Tank, treat that liquid is mixed, form the base fluid of fracturing fluid；
Step 3) by step 2) in the base fluid for obtaining of institute and crosslinking agent with 100:0.3 mass ratio is mixed to form pressure break
Liquid.
Beneficial effects of the present invention：
This fracturing fluid of the present invention has unique anti-salt property, disclosure satisfy that high salinity production water Quick cross-linking is taken
Sand, fracture flow conductivity affect little, reservoir reconstruction requirement within disclosure satisfy that 100 DEG C, the fracturing fluid can with stratum water or
The production water that simple removal of impurities is processed is prepared, and high water resource recycling rate of waterused mitigates environmental protection pressure, and the fracturing fluid system has
Good temperature and shearing sustainability, breaks glue thoroughly, and residue is few, and the injury to reservoir is less, solves conventional fracturing fluid easily corrupt
Shortcoming rotten, that salt resistant character is poor, viscosity reduction is rapid, reservoir compatibility is poor.
Description of the drawings
Fig. 1 is fracturing fluid described in the embodiment of the present invention 2 in the temperature and shearing sustainability in 85 DEG C of Oil/gas Wells；
Fig. 2 is fracturing fluid described in the embodiment of the present invention 3 in the temperature and shearing sustainability in 100 DEG C of Oil/gas Wells；
Fig. 3 is fracturing fluid described in the embodiment of the present invention 4 in the temperature and shearing sustainability in 100 DEG C of Oil/gas Wells；
Specific embodiment
Embodiment 1：
In order to overcome, conventional fracturing fluid is easily putrid and deteriorated, salt resistant character is poor, viscosity reduction is rapid, the problem of reservoir compatibility difference,
The present invention proposes a kind of fracturing fluid, and including base fluid and crosslinking agent, the base fluid includes following components：By weight percentage,
0.3%-0.4% thickening agent, 0.2%-2% sulfur elimination, 0.1%-0.2% screener, 0.1%-0.2% environmental protection bactericide,
0.3-0.5% clay stabilizer, 0.3%-0.4% cleanup additive, balance of water, the mass ratio of the base fluid and crosslinking agent is 100:
0.3-1.
The thickening agent is a kind of instant guar gum, is addition etherifying agent 3- chlorine 2- hydroxypropyl on the basis of hydroxypropyl guar gum
Trimethyl ammonium chloride modification is formed.It is prepared as follows：The hydroxypropyl guar gum that mass percent is 30.3% is added in flask,
Using mass percent as 42.4% ethanol as reaction medium, the hydrogen-oxygen that mass percent is 9.1% mass concentration 25% is dripped
Changing sodium solution carries out alkalizing swelling, stirs and be passed through nitrogen under normal temperature, is warming up to 60 DEG C, then is slowly added dropwise mass percent and is
The solution of 18.2% mass fraction concentration 30%3- chlorine 2- hydroxypropyl-trimethyl ammonium chloride is in ethanol, anti-under the reaction temperature
Answer 5h, after having reacted, be neutralized to pH=7～8 with glacial acetic acid, then washed with ethanol solution suction filtration, drying, crush obtain speed
Molten guar gum.
The sulfur elimination is FeCl3、ZnCl2、ZnSO4·7H2O、CuCl2, basic zinc carbonate, basic copper carbonate any one
Plant or arbitrarily compounding mixture in them or the aqueous solution.The screener is five sodium of diethylene triamine pentamethylene phosphonic, ammonia
Three methylenephosphonic acid of base, five sodium of ATMP, ethylene diamine tetra methylene phosphonic acid sodium, five sodium of ethylene diamine tetra methylene phosphonic acid, oneself two
Four methylenephosphonic acid of amine, six sylvite of hexapotassium, organic phosphine carboxylic acid, 2- HPAA or phosphono-carboxylic acids
In copolymer any one or in them be combined mixture or the aqueous solution.The environmental protection bactericide is dodecyl
Dimethyl benzyl ammonium chloride, DTAC, dodecyl dimethyl benzyl ammonium bromide, benzyl triphenyl phosphonium chloride
Any one or arbitrarily compounding mixture in them or the aqueous solution of phosphine, tetrahydroxy sulfuric acid phosphorus.Clay stabilizer is double (2-
Ethoxy) alkyl dimethyl ammonium chloride and chlorination -2- ethoxy trimethylammonium in mass ratio 1:1 compound.The cleanup additive is using pressure
Liquid cleanup additive is split, is not illustrated here.
The crosslinking agent is with boric acid as raw material, carries out network with ethylene glycol and triethanolamine under sodium hydroxide catalyzed effect
Close reaction to be prepared from.It is prepared as follows：In the flask equipped with thermometer, water knockout drum and reflux condensing tube, sequentially add
Mass percent is 5.6% triethanolamine, 21.4% boric acid and 1.7% sodium hydrate aqueous solution, is warming up to 70 DEG C of stirring reactions
About 1h, makes boric acid complete hydrolysis, is subsequently adding mass percent for 17.2% ethylene glycol, is warming up to 120～130 DEG C, and reaction 3～
4h can discharging.
The preparation method of this fracturing fluid of the present invention, comprises the following steps：
Step 1) prepare following component：By weight percentage, 0.3%-0.4% thickening agent, 0.2%-2% sulphur removal
Agent, 0.1%-0.2% screener, 0.1%-0.2% environmental protection bactericide, 0.3-0.5% clay stabilizer, 0.3%-0.4% are helped
Row's agent, balance of water；
Step 2) by step 1) in the water that prepared add in Agitation Tank, then by step 1) in other components pump successively
Enter Agitation Tank, treat that liquid is mixed, form the base fluid of fracturing fluid；
Step 3) by step 2) in the base fluid for obtaining of institute and crosslinking agent with 100:The mass ratio of 0.3-1 is mixed to form pressure break
Liquid.
This fracturing fluid of the present invention has unique anti-salt property, disclosure satisfy that high salinity production water Quick cross-linking is taken
Sand, with good temperature and shearing sustainability, hanging grittiness can be strong, breaks glue thoroughly, and the impact of fracture flow conductivity is little, while improving
Water utilization rate, reservoir reconstruction requirement within disclosure satisfy that 100 DEG C.
Embodiment 2：
A kind of fracturing fluid is present embodiments provided, by weight percentage, in Agitation Tank, adds 98.7% to produce at the scene
Water, under pump truck circulation, is slowly added to 0.3% instant guar gum, 0.2% sulfur elimination, 0.1% screener, 0.1% environmental protection successively and kills
Microbial inoculum, 0.3% clay stabilizer, 0.3% cleanup additive, continue cycling through 30 minutes, treat that liquid is sufficiently mixed uniformly, form fracturing fluid
Base fluid, in pressing crack construction by base fluid and crosslinking agent with 100：0.3 quality proportioning is mixed to form fracturing fluid gel in fracturing blender truck.
Wherein, the instant guar gum is prepared as follows：The hydroxypropyl guar gum that mass percent is 30.3% is added and is burnt
In bottle, using mass percent as 42.4% ethanol as reaction medium, it is 9.1% mass concentration 25% to drip mass percent
Sodium hydroxide solution carries out alkalizing swelling, stirs and is passed through nitrogen, be warming up to 60 DEG C, then be slowly added dropwise mass percent under normal temperature
For 18.2% mass concentration 30%3- chlorine 2- hydroxypropyl-trimethyl ammonium chloride solution in ethanol, under the reaction temperature react
5h, is neutralized to pH=7～8 with glacial acetic acid after having reacted, then washed with ethanol solution suction filtration, drying, crush obtain instant
Guar gum；
The sulfur elimination is FeCl3；The screener is five sodium of diethylene triamine pentamethylene phosphonic；The environmental protection bactericide
For dodecyl benzyl dimethyl ammonium chloride；The clay stabilizer is double (2- ethoxy) alkyl dimethyl ammonium chlorides and chlorination -2-
Ethoxy trimethylammonium in mass ratio 1:1 compound；The cleanup additive adopts fracturing fluid cleanup additive, does not do here concrete
Explanation；
The crosslinking agent is with boric acid as raw material, carries out network with ethylene glycol and triethanolamine under sodium hydroxide catalyzed effect
Close reaction to be prepared from.It is prepared as follows：In the flask equipped with thermometer, water knockout drum and reflux condensing tube, sequentially add
Mass percent is 5.6% triethanolamine, 21.4% boric acid and 1.7% sodium hydrate aqueous solution, is warming up to 70 DEG C of stirring reactions
About 1h, makes boric acid complete hydrolysis, is subsequently adding mass percent for 17.2% ethylene glycol, is warming up to 120～130 DEG C, and reaction 3～
4h can discharging.
The preparation method of fracturing fluid is with embodiment 1.
The fracturing fluid system formula is suitable for the fracturing reform of the Oil/gas Well within 85 DEG C.
Heatproof resistant to shearing test result of the fracturing fluid in 85 DEG C of Oil/gas Wells is as shown in figure 1, other performances such as table 1 below institute
Show：
Table other the performance test results of 1 fracturing fluid system
| Project name | Test result |
| Stratum water preparing fracturing fluid (80,000 mg/L) | Cross-linking, can hang |
| Residue content (mg/L) | 243.44 |
| Breaking glue solution viscosity (mPa s) | 3.42 |
| Core damage rate (%) | 21.32 |
Embodiment 3：
A kind of fracturing fluid is present embodiments provided, in Agitation Tank, adds 96.3% water is produced, under pump truck circulation, successively
Be slowly added to 0.4% instant guar gum, 2% sulfur elimination, 0.2% screener, 0.2% environmental protection bactericide, 0.5% clay stabilizer,
0.4% cleanup additive, continues cycling through 30 minutes, treats that liquid is sufficiently mixed uniformly, forms fracturing fluid base fluid, in pressing crack construction by base
Liquid and crosslinking agent are with 100：0.6 quality proportioning is mixed to form fracturing fluid gel in fracturing blender truck.
Wherein, the instant guar gum is prepared as follows：The hydroxypropyl guar gum that mass percent is 30.3% is added and is burnt
In bottle, using mass percent as 42.4% ethanol as reaction medium, it is 9.1% mass concentration 25% to drip mass percent
Sodium hydroxide solution carries out alkalizing swelling, stirs and is passed through nitrogen, be warming up to 60 DEG C, then be slowly added dropwise mass percent under normal temperature
For 18.2% mass concentration 30%3- chlorine 2- hydroxypropyl-trimethyl ammonium chloride solution in ethanol, under the reaction temperature react
5h, is neutralized to pH=7～8 with glacial acetic acid after having reacted, then washed with ethanol solution suction filtration, drying, crush obtain instant
Guar gum；
The sulfur elimination is FeCl3With ZnCl2According to 1：The mixture of 1 mass ratio, the screener are three methene of amino
Five sodium of phosphonic acids；The environmental protection bactericide is dodecyl dimethyl benzyl ammonium bromide；The clay stabilizer is double (2- hydroxyl second
Base) alkyl dimethyl ammonium chloride and chlorination -2- ethoxy trimethylammonium in mass ratio 1:1 compound；The cleanup additive is bored using river celebrating
Visit the cleanup additive of homemade model G517 of engineering and technological research institute of Engineering Co., Ltd；
The crosslinking agent is with boric acid as raw material, carries out network with ethylene glycol and triethanolamine under sodium hydroxide catalyzed effect
Close reaction to be prepared from.It is prepared as follows：In the flask equipped with thermometer, water knockout drum and reflux condensing tube, sequentially add
Mass percent is 5.6% triethanolamine, 21.4% boric acid and 1.7% sodium hydrate aqueous solution, is warming up to 70 DEG C of stirring reactions
About 1h, makes boric acid complete hydrolysis, is subsequently adding mass percent for 17.2% ethylene glycol, is warming up to 120～130 DEG C, and reaction 3～
4h can discharging.
The preparation method of fracturing fluid is with embodiment 1.
The fracturing fluid system formula is suitable for the fracturing reform of the Oil/gas Well within 100 DEG C.
Heatproof resistant to shearing test result of the fracturing fluid in 100 DEG C of Oil/gas Wells is as shown in Fig. 2 other performances such as table 2 below
Shown：
Table other the performance test results of 2 fracturing fluid system
| Project name | Test result |
| Stratum water preparing fracturing fluid (80,000 mg/L) | Cross-linking, can hang |
| Residue content (mg/L) | 296.53 |
| Breaking glue solution viscosity (mPa s) | 4.15 |
| Core damage rate (%) | 23.72 |
Embodiment 4：
A kind of fracturing fluid is present embodiments provided, in Agitation Tank, adds 97.6% water is produced, under pump truck circulation, successively
It is slowly added to 0.35% instant guar gum, 1% sulfur elimination, 0.15% screener, 0.15% environmental protection bactericide, 0.4% clay stabilization
Agent, 0.35% cleanup additive, continue cycling through 30 minutes, treat that liquid is sufficiently mixed uniformly, form fracturing fluid base fluid, in pressing crack construction
By base fluid and crosslinking agent with 100：1 quality proportioning is mixed to form fracturing fluid gel in fracturing blender truck.
Wherein, the instant guar gum is prepared as follows：The hydroxypropyl guar gum that mass percent is 30.3% is added and is burnt
In bottle, using mass percent as 42.4% ethanol as reaction medium, it is 9.1% mass concentration 25% to drip mass percent
Sodium hydroxide solution carries out alkalizing swelling, stirs and is passed through nitrogen, be warming up to mass concentration, then be slowly added dropwise quality hundred under normal temperature
Divide than the solution for 18.2% mass concentration 30%3- chlorine 2- hydroxypropyl-trimethyl ammonium chloride in ethanol, under the reaction temperature
Reaction 5h, be neutralized to pH=7～8 with glacial acetic acid after react, then washed with ethanol solution suction filtration, drying, crushing obtain
Instant guar gum；
The sulfur elimination is FeCl3；The screener is ethylene diamine tetra methylene phosphonic acid sodium；The environmental protection bactericide is 12
Zephiran and DTAC are according to 1：The mixture of 1 mass ratio；The clay is steady
Agent is determined for double (2- ethoxy) alkyl dimethyl ammonium chlorides and chlorination -2- ethoxy trimethylammonium in mass ratio 1:1 compound；Described help
Row's agent adopts fracturing fluid cleanup additive, does not illustrate here；
The crosslinking agent is with boric acid as raw material, carries out network with ethylene glycol and triethanolamine under sodium hydroxide catalyzed effect
Close reaction to be prepared from.It is prepared as follows：In the flask equipped with thermometer, water knockout drum and reflux condensing tube, sequentially add
Mass percent is 5.6% triethanolamine, 21.4% boric acid and 1.7% sodium hydrate aqueous solution, is warming up to 70 DEG C of stirring reactions
About 1h, makes boric acid complete hydrolysis, is subsequently adding mass percent for 17.2% ethylene glycol, is warming up to 120～130 DEG C, and reaction 3～
4h can discharging.
The preparation method of fracturing fluid is with embodiment 1.
The fracturing fluid system formula is suitable for the fracturing reform of the Oil/gas Well within 100 DEG C.
Heatproof resistant to shearing test result of the fracturing fluid in 100 DEG C of Oil/gas Wells is as shown in figure 3, other performances such as table 3 below
Shown：
Table other the performance test results of 3 fracturing fluid system
| Project name | Test result |
| Stratum water preparing fracturing fluid (80,000 mg/L) | Cross-linking, can hang |
| Residue content (mg/L) | 272.67 |
| Breaking glue solution viscosity (mPa s) | 4.37 |
| Core damage rate (%) | 22.87 |
Embodiment 5：
A kind of fracturing fluid is present embodiments provided, by weight percentage, in Agitation Tank, adds 98.7% to produce at the scene
Water, under pump truck circulation, is slowly added to 0.3% instant guar gum, 0.2% sulfur elimination, 0.1% screener, 0.1% environmental protection successively and kills
Microbial inoculum, 0.3% clay stabilizer, 0.3% cleanup additive, continue cycling through 30 minutes, treat that liquid is sufficiently mixed uniformly, form fracturing fluid
Base fluid, in pressing crack construction by base fluid and crosslinking agent with 100：0.3 quality proportioning is mixed to form fracturing fluid gel in fracturing blender truck.Its
In, the environmental protection bactericide is zephiran.
Embodiment 6：
A kind of fracturing fluid is present embodiments provided, in Agitation Tank, adds 96.3% water is produced, under pump truck circulation, successively
Be slowly added to 0.4% instant guar gum, 2% sulfur elimination, 0.2% screener, 0.2% environmental protection bactericide, 0.5% clay stabilizer,
0.4% cleanup additive, continues cycling through 30 minutes, treats that liquid is sufficiently mixed uniformly, forms fracturing fluid base fluid, in pressing crack construction by base
Liquid and crosslinking agent are with 100：0.6 quality proportioning is mixed to form fracturing fluid gel in fracturing blender truck.Wherein, the environmental protection bactericide is ten
Dialkyl dimethyl Benzylphosphonium Bromide ammonium.
Embodiment 7：
A kind of fracturing fluid is present embodiments provided, in Agitation Tank, adds 97.6% water is produced, under pump truck circulation, successively
It is slowly added to 0.35% instant guar gum, 1% sulfur elimination, 0.15% screener, 0.15% environmental protection bactericide, 0.4% clay stabilization
Agent, 0.35% cleanup additive, continue cycling through 30 minutes, treat that liquid is sufficiently mixed uniformly, form fracturing fluid base fluid, in pressing crack construction
By base fluid and crosslinking agent with 100：1 quality proportioning is mixed to form fracturing fluid gel in fracturing blender truck.Wherein, the environmental protection bactericide is
Dodecyl benzyl dimethyl ammonium chloride and DTAC are according to 1：The mixture of 1 mass ratio
To sum up described in embodiment 27, the production water that the fracturing fluid can be processed with stratum water or simple removal of impurities is prepared,
High water resource recycling rate of waterused, mitigates environmental protection pressure, and the fracturing fluid system has good temperature and shearing sustainability, breaks glue thorough
Bottom, residue are few, and the injury to reservoir is less.
Illustration only to the present invention exemplified as above, does not constitute the restriction to protection scope of the present invention, all
It is that design same or analogous with the present invention is belonged within protection scope of the present invention.
Claims (9)
1. a kind of fracturing fluid, it is characterised in that：Including base fluid and crosslinking agent, the base fluid includes following components：Percentage by weight
Than meter, 0.3%-0.4% thickening agent, 0.2%-2% sulfur elimination, 0.1%-0.2% screener, 0.1%-0.2% environmental protection are sterilized
Agent, 0.3-0.5% clay stabilizer, 0.3%-0.4% cleanup additive, balance of water, the mass ratio of the base fluid and crosslinking agent is
100:0.3-1.
2. a kind of fracturing fluid as claimed in claim 1, it is characterised in that：The thickening agent is instant guar gum, its preparation method
As follows：Hydroxypropyl guar gum that mass percent is 30.3% is added in flask, using mass percent as 42.4% ethanol as
Reaction medium, dripping the sodium hydroxide solution that mass percent is 9.1% mass concentration 25% carries out alkalizing swelling, stirs under normal temperature
Mix and nitrogen is passed through, 60 DEG C are warming up to, then mass percent is slowly added dropwise for 18.2% mass fraction concentration 30%3- chlorine 2- hydroxyl
The solution of hydroxypropyltrimonium chloride is reacted 5h under the reaction temperature, is neutralized to pH with glacial acetic acid after having reacted in ethanol
=7～8, then washed with ethanol solution suction filtration, drying, crush obtain instant guar gum.
3. a kind of fracturing fluid as claimed in claim 1, it is characterised in that：The sulfur elimination is FeCl3、ZnCl2、ZnSO4·
7H2O、CuCl2, basic zinc carbonate, any one or arbitrarily compounding mixture in them or the aqueous solution of basic copper carbonate.
4. a kind of fracturing fluid as claimed in claim 1, it is characterised in that：The screener is diethylene triamine pentamethylene phosphonic
Five sodium, ATMP, five sodium of ATMP, ethylene diamine tetra methylene phosphonic acid sodium, ethylene diamine tetra methylene phosphonic acid five
Sodium, hexapotassium, six sylvite of hexapotassium, organic phosphine carboxylic acid, 2- HPAA or phosphono
In the copolymer of yl carboxylic acid any one or in them be combined mixture or the aqueous solution.
5. a kind of fracturing fluid as claimed in claim 1, it is characterised in that：The environmental protection bactericide is dodecyl dimethyl benzyl
Ammonium chloride, DTAC, dodecyl dimethyl benzyl ammonium bromide, benzyl triphenyl phosphonium chloride phosphine, four hydroxyls
Any one or arbitrarily compounding mixture in them or the aqueous solution of base sulfuric acid phosphorus.
6. a kind of fracturing fluid as claimed in claim 1, it is characterised in that：The clay stabilizer is double (2- ethoxy) diformazans
Ammonium chloride and chlorination -2- ethoxy trimethylammonium in mass ratio 1:1 compound.
7. a kind of fracturing fluid as claimed in claim 1, it is characterised in that：Preparing for the crosslinking agent is as follows：Temperature is being housed
In meter, the flask of water knockout drum and reflux condensing tube, sequentially add mass percent for 54.1% water, 5.6% triethanolamine,
21.4% boric acid and 1.7% NaOH, are warming up to 70 DEG C of stirring reactions 1h, make boric acid complete hydrolysis, be subsequently adding quality hundred
Divide than being 17.2% ethylene glycol, 120～130 DEG C are warming up to, 3～4h of reaction can discharge.
8. a kind of preparation method of fracturing fluid, it is characterised in that：Comprise the following steps：
Step 1) prepare following component：By weight percentage, 0.3%-0.4% thickening agent, 0.2%-2% sulfur elimination,
0.1%-0.2% screener, 0.1%-0.2% environmental protection bactericide, 0.3-0.5% clay stabilizer, 0.3%-0.4% help row
Agent, balance of water；
Step 2) by step 1) in the water that prepared add in Agitation Tank, then by step 1) in other components pump into successively and join
Flow container, treats that liquid is mixed, and forms the base fluid of fracturing fluid；
Step 3) by step 2) in the base fluid for obtaining of institute and crosslinking agent with 100:The mass ratio of 0.3-1 is mixed to form fracturing fluid.
9. a kind of preparation method of fracturing fluid as claimed in claim 8, it is characterised in that：Comprise the following steps：
Step 1) prepare following component：By weight percentage, 0.3% thickening agent, 0.2% sulfur elimination, 0.1% screener,
0.1% environmental protection bactericide, 0.3% clay stabilizer, 0.3% cleanup additive, 98.7% water；
Step 2) by step 1) in the water that prepared add in Agitation Tank, then by step 1) in other components pump into successively and join
Flow container, treats that liquid is mixed, and forms the base fluid of fracturing fluid；
Step 3) by step 2) in the base fluid for obtaining of institute and crosslinking agent with 100:0.3 mass ratio is mixed to form fracturing fluid.
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| CN115678530A (en) * | 2022-10-28 | 2023-02-03 | 四川瑞都石油工程技术服务有限公司 | Shielding agent suitable for high-salinity water quality, guanidine gum fracturing fluid system and preparation method |
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