CN106350048A - Oil washing agent for oil well fracturing as well as preparation method and application of oil washing agent - Google Patents
Oil washing agent for oil well fracturing as well as preparation method and application of oil washing agent Download PDFInfo
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/584—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific surfactants
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Abstract
The invention provides an oil washing agent for oil well fracturing. The oil washing agent comprises a sulfonate type anionic surfactant, a cationic Gemini surfactant, a polyoxyethylene ether type nonionic surfactant and water. The oil washing agent has the characteristics of simple formula, easy preparation, low surface tension, good compatibility with fracturing fluid, high economy and efficiency, and the like, and can achieve excellent oil washing effect by adding a small amount (about 0.1 wt%) to the fracturing fluid. The invention also provides a preparation method and application of the oil washing agent.
Description
Technical field
The present invention relates to technical field of petrochemical industry is and in particular to one kind detergent used in wellfracturing and its system
Preparation Method and application.
Background technology
China's unconventional petroleum resources rich reserves, its exploration and development increasingly receives publicity.Unconventional reservoir hole hole
Road is little, and capillary force is big, during slit formation waterflood development of low-permeability reservoirs, generally passes through to add suitable surfactant,
Using it, there is the effects such as reduction interfacial tension, wettability reversal, emulsion dispersion, so that the water in crack is incited somebody to action in the presence of capillary force
Crude oil in substrate cements out, and this effect is referred to as imbibition effect.
For compact oil reservoir, extensive volume fracturing is one of key technology that fine and close oil and gas reservoir is successfully developed, in a large number
Fracturing fluid huge discharge injection stratum in the process, form complicated man-made fracture.Compared with conventional pressure break, extensive volume
Pressure break often appears as the row of returning and leads low (often below 50%), the row's of returning time length (up to the several months).
Although oil recovery technique, in constantly progress, there is no the spontaneous imbibition phenomena compact oil reservoir and pressure break skill at present
The precedent that art effectively combines, remains on the urgent needss existing to improving displacement efficiency, the method for pressure break efficiency, especially right
Exploitation in unconventional oil well.
Content of the invention
It is an object of the invention to provide a kind of detergent for wellfracturing, the preparation method of this detergent, and
The application of this detergent, and the fracturing process described detergent being applied to compact oil reservoir is provided.
According to an aspect of the present invention, there is provided a kind of wellfracturing detergent, including sulfonate type anionic surface
Activating agent, cationic gemini (Shuangzi) surfactant, Polyoxyethylene Ether Nonionic Surfactant and water.
According to some preferred implementations of the present invention, described detergent is by sulfonate type anion surfactant, sun
Ion-type gemini surfactant, Polyoxyethylene Ether Nonionic Surfactant and water composition.
According to the preferred embodiment of the present invention, based on described detergent weight meter, described detergent comprises:
The detergent of the present invention is to be compounded by anion, cation gemini surfactant and nonionic surfactant
Form, especially uniquely with sulfonate type anion surfactant, cationic gemini (Shuangzi) surfactant and
Polyoxyethylene Ether Nonionic Surfactant carry out compounding form, active high, the features such as displacement efficiency is high.This detergent
Overcome anion surfactant salt-resistance poor, inefficient the shortcomings of, and make use of sulfonate type anion with sun from
The Strong synergy that sub- Gemini surface active agent has, can realize relatively low oil water interfacial tension at low concentrations, add
The distinctive wettability of Composed of Non-ionic Surfactant, penetration, washability and low bubble effect, make the detergent compounding out not only
The interfacial tension of profit can be reduced additionally it is possible to change wettability of rock surface, so that glossy wet, weak water-wet rock surface is become
For weak water-wet and strong water-wet, reduce the contact angle in rock surface for the water, increase driving force produced by liquid self-absorbing, and then
Greatly improve the washing oil rate of fracturing fluid.
According to some preferred implementations of the present invention, based on described detergent weight meter, described detergent comprises:
Sulfonate type anion surfactant 20～40wt%, preferably 25～35wt%, more preferably 26-33wt%；
Cationic gemini surfactant 2～15wt%, preferably 3～12wt%, more preferably 4-8wt%；
Polyoxyethylene Ether Nonionic Surfactant 2～20wt%, preferably 3～12wt%, more preferably 4-8wt%；With
The water of surplus.
Tests prove that, the detergent with this content composition has outstanding washing oil effect.
According to some preferred implementations of the present invention, in described detergent, described sulfonate type anionic surface is lived
Property agent: cationic gemini surfactant: the weight of Polyoxyethylene Ether Nonionic Surfactant is than being (3.6～7):
(0.8～1.8): 1, preferably (5-6.5): (0.8～1.6): 1.
In some preferred implementations of the present invention, described sulfonate type anion surfactant: cationic
The weight of gemini surfactant is than for 3.7～6.5: 1, preferably 4.5～6.0: 1.
According to further preferred embodiment of the present invention, based on described detergent weight meter, described detergent comprises:
According to a particularly preferred embodiment of the present, based on described detergent weight meter, described detergent comprises:
According to the present invention, described sulfonate type anion surfactant is preferably selected from octyl sulfonic acid salt, detergent alkylate
At least one in sulfonate, petroleum sulfonate, heavy alkylbenzene sulfonate and α olefin sulfonate, preferably octyl sulfonic acid salt, ten
At least one in dialkyl benzene sulfonate and petroleum sulfonate.Aforementioned salt is preferably sodium salt.Described sulfonate type anion table
Face activating agent is more preferably dodecylbenzene sodium sulfonate and/or petroleum sodium sulfonate.
According to the present invention, described cationic gemini surfactant be preferably selected from the own diammonium of bromination dimethyl, double ten
Six alkyl dimethyl ammonium bromide, double dodecyldimethylamine base ammonium bromide, double dodecyl dimethyl ammonium chloride, two bromos-two (two
Methyl dodecyl) at least one in fourth diammonium and two bromo-two (dimethyl dodecyl base) propane-diammoniums；Preferably double hexadecanes
Base trimethylammonium bromide and two bromo-two (dimethyl dodecyl base) fourth diammonium, more preferably DHAB.
According to the present invention, described Polyoxyethylene Ether Nonionic Surfactant be preferably selected from alkylphenol polyoxyethylene,
At least one in fatty alcohol-polyoxyethylene ether, propylene glycol polyoxyethylene poly-oxygen propylene aether and alkylolamideses polyoxyethylene ether,
Be preferably selected from NPE (op-10), fatty alcohol (c12-c16 Cortex cocois radiciss oleyl alcohol) polyoxyethylene (7) ether (aeo-7) and
At least one in laureth, more preferably NPE (op-10).
For conventional fracturing fluid, add detergent in 0.1wt% about when, oil water interfacial tension generally can be in 1-10mn/m
Scope, contact angle generally can be in 2-30 ° of scope.
The detergent that the present invention provides, make use of sulfonate, Gemini surface active agent and three kinds of nonionic surfactant
The compound of material, the ultralow surface and interface tension force of not simple pursuit, but opened by the comprehensive oil-water interfaces reducing fracturing fluid
Power and raising to significantly improve displacement efficiency in factor of both wettability of rock surface.
Can be by its component be carried out mixing preparing according to the detergent that the present invention provides.Can be by each component to appoint
Meaning order mixing, or to mix according to a graded, preferably the latter.
Therefore, according to the second aspect of the invention, there is provided the preparation method of above-mentioned detergent, comprising: by sulfonate
Type anion surfactant and cationic gemini surfactant are added to the water, stirring certain time, preferred 20-
After 60min, add Polyoxyethylene Ether Nonionic Surfactant, continue stirring, preferred 20-60min, obtain described washing oil
Agent.The compound prepared in this way will have more preferable washing oil effect.This preparation process can be carried out in a kettle..
The water using in the present invention can be tap water, oil field reinjection water etc..
According to the third aspect of the present invention, there is provided a kind of fracturing fluid, carry including basic fracturing fluid with according to the present invention
For detergent as above.
Described basis fracturing fluid refers to Common fracturing fluid used in prior art.
According to the preferred embodiment of the present invention, described fracturing fluid includes being calculated as 0.05- based on described fracturing fluid weight
The described detergent of 0.2wt%.
In present invention further optimization embodiment, described fracturing fluid includes being calculated as based on described fracturing fluid weight
The described detergent of 0.08-0.14wt%.
In the still more preferably embodiment of the present invention, described fracturing fluid includes being calculated as based on described fracturing fluid weight
The described detergent of 0.085-0.125wt%.
As an innovation of the present invention, the present invention devises detergent as above, and detergent is added
Fracturing fluid uses.Using the Strong synergy of sulfonate type anion and cation Gemini surfactant, make to compound out
Detergent not only can reduce fracturing fluid oil water interfacial tension additionally it is possible to change the wettability to rock surface for the fracturing fluid,
Reduce the contact angle in rock surface for the water, increase driving force produced by liquid self-absorbing, and then greatly improve the washing oil of fracturing fluid
Rate.
The fracturing fluid being provided according to the present invention, by adding the detergent that the present invention provides, its interfacial tension can be reduced to
Less than 10mn/m, for example, 2-10mn/m；It can decrease below 30 ° in the contact angle of rock surface, such as 10-25 °.Described
The washing oil rate of fracturing fluid is up to more than 30wt%, such as 32-46wt%.
It is to add appropriate basis in Common fracturing fluid (i.e. described basis fracturing fluid) according to the fracturing fluid that the present invention provides
The detergent providing is provided and is obtained.Applicable Common fracturing fluid is not particularly limited, and can be existing any fracturing fluid.
According to certain embodiments of the present invention, described basis fracturing fluid comprises: hydroxypropyl guar gum or modified polypropene acyl
Amine: 0.05～0.15wt%；Clay stabilizer: 0.3～1.2wt%；Cleanup additive: 0.3～1.0wt%；Regulator: 0～
1.2wt%；And cross-linking agent: 0～1.2wt%.
Wherein, clay stabilizer, cleanup additive, regulator and cross-linking agent can be commonly used in the art, can be by this area
Technical staff is selected as needed.
The detergent being provided according to the present invention, only need to add in fracturing fluid little amount (0.1wt% about) i.e. up to
To preferable washing oil effect.Because interfacial tension is low, the detergent that the present invention provides even can substitute cleanup additive and use, and meet pressure
Split the technical requirements of liquid.
Rock core after vacuum saturation is put in different washing oil agent solutions, after one week, observes washing oil effect.By the present invention
Contrast on effect when detergent and other Common surface activating agents are used alone, test result indicate that, this detergent can will be washed
Oil cut rate raising reaches more than 30%.
According to the fourth aspect of the invention, there is provided according to the present invention provide detergent wellfracturing construction, especially
It is the application in compact oil reservoir volume fracturing, particularly in compact oil reservoir, trap remaining oil is displaced by imbibition effect
Application in construction.According to another aspect of the invention, there is provided a kind of compact oil reservoir volume fracturing method, walk including following
Rapid:
I prepares basic fracturing fluid；
The detergent being provided according to the present invention is added in the fracturing fluid of described basis by ii with the amount of 0.05-0.2wt%；
Iii carries out pressing crack construction according to conventional-volume fracturing procedures, and fracturing fluid described in ii is pumped to stratum, and construction terminates
After carry out the row's of returning operation.Described volume fracturing program can select the volume fracturing program of routine.
Described in step i, basic fracturing fluid is same as above, and wherein preferably its composition comprises: hydroxypropyl guar gum or modified poly- third
Acrylamide: 0.05～0.15wt%；Clay stabilizer: 0.3～1.2wt%；Cleanup additive: 0.1～1.0wt%；Regulator: 0～
0.2wt%；Cross-linking agent: 0～1.2wt%.
This detergent is added in the basic fracturing fluid of volume fracturing, in conventional-volume pressure break, by storing up to oil gas
The 3 D stereo transformation of collection lithosphere, forms man-made fracture cubic network, realizes fracturing fracture swept volume in reservoir and maximizes,
Greatly improve reservoir effective permeability.In fracturing process, stratum becomes seam web frame, and fracturing fluid enters in stratum therewith, root
The spontaneous imbibition function having according to detergent, makes the trap remaining oil that cannot produce in stratum by imbibition out, with fracturing fluid
Return and be discharged to ground.The recovery ratio up to more than 30% that this imbibition effect improves, substantially increases volume fracturing efficiency.
Preferably, described fracturing fluid is heated to 50-180 DEG C to be passed into again in fracturing stratum using.Through heating
Fracturing fluid can improve displacement efficiency, and improves washing oil rate.The source of heat energy can select as the case may be, for example, can
With using the heat being inevitably generated during execute-in-place.
The present invention passes through the detergent being provided is added in fracturing fluid, using volume fracturing liquid measure is big, the row's of returning time
Long the features such as, rely on the imbibition effect of surfactant to produce trap remaining oil, increase washing oil rate, improve final pressure break effect
Really.
Non-exhaustively, the present invention has the advantage that.
1. formula simply effectively, preparation method is simple.
2. pass through the compounding of three kinds of main active component, detergent of the present invention has reduction interfacial tension, improves wettability
Effect, dosage few (0.1% about) can reach preferable washing oil effect.This detergent has that compatibility is good, high financial profit
The features such as.
3. in compact oil reservoir, trap remaining oil is displaced by imbibition effect because the detergent that the present invention provides has
Ability, in compact oil reservoir volume fracturing, add detergent of the present invention can significantly improve fracturing effect.
Specific embodiment
With reference to specific embodiment, the present invention will be further described it should be appreciated that the scope of the present invention is not limited to
This.
In the following Examples and Comparative Examples, referring to Chinese patent cn201233391, it is whole for washing oil effect evaluating device
Content is herein incorporated by reference.
Embodiment 1
In 2m3Reactor in, add 600kg tap water, be stirred at room temperature, disposable add double hexadecyl diformazan
Base ammonium bromide (Yixing City Chemistry Plant) 50kg, (the auspicious ocean in Guangzhou surfactant has NPE -10 (op-10)
Limit company) 50kg, after stirring 30 minutes, add 300kg dodecylbenzene sodium sulfonate (the auspicious ocean in the Guangzhou limited public affairs of surfactant
Department), continuous stirring 30 minutes, that is, obtain detergent product of the present invention.
Take this detergent product appropriate, be added in fracturing fluid (containing hydroxypropyl guar gum: 0.05wt%～0.15wt%；Viscous
Soil stabilizer: 0.3wt%～1.2wt%；Cleanup additive: 0.3wt%～1.0wt%；And water), make the washing oil agent concentration be
0.1wt%.It is 3mn/m using the interfacial tension that full-automatic surface tension instrument k100c (German kruss company) measures fracturing fluid,
It is 9 ° using contact angle measurement jc2000c (Shanghai Zhongchen digital technology equipment Co., Ltd) measurement contact angle.By fracturing fluid
It is added to containing saturated core (core parameters: sandstone, diameter 25.01mm, length 50.19mm, permeability 1.1637md, hole
Degree 12.18%) device for washing oil in, after imbibition one week, washing oil rate is 42%.
Comparative example 1
Without the detergent of the present invention in the fracturing fluid that embodiment 1 uses, criticize rock core (rock core using same with embodiment 1
Parameter: sandstone, diameter 25.03mm, length 50.22mm, permeability 1.132md, porosity 12.32%) to be tested, interface is opened
Power is 12mn/m, and contact angle is 31 ° of washing oil rates measuring fracturing fluid under the same conditions is 15%.
From embodiment 1 and comparative example 1 results contrast, fracturing fluid adds the detergent of a small amount of present invention, its
Displacement efficiency improves 27%.
Comparative example 2
Similar to Example 1, criticize rock core (core parameters: sandstone, diameter 25.08mm, length using same with embodiment 1
50.07mm, permeability 1.2086md, porosity 12.09%) to be tested, difference is, is added without in detergent preparation
DHAB.The interfacial tension measuring the fracturing fluid after adding this detergent is 8.7mn/m, and contact angle is
19 °, washing oil rate is 27%.
Comparative example 3
Similar to Example 1, criticize rock core (core parameters: sandstone, diameter 25.00mm, length using same with embodiment 1
50.11mm, permeability 1.1875md, porosity 12.31%) to be tested, difference is, is added without in detergent preparation
op-10.The interfacial tension measuring the fracturing fluid after adding this detergent is 5.6mn/m, and contact angle is 22 °, and washing oil rate is 21%.
Comparative example 4
Similar to Example 1, criticize rock core (core parameters: sandstone, diameter 25.01mm, length using same with embodiment 1
50.10mm, permeability 1.1875md, porosity 12.31%) to be tested, difference is, is added without in detergent preparation
Dodecylbenzene sodium sulfonate.The interfacial tension measuring the fracturing fluid after adding this detergent is 7.7mn/m, and contact angle is 22 °, washes
Oil cut rate is 20%.
Embodiment 2
In 2m3Reactor in, add 500kg oil field reinjection water, be stirred at room temperature, disposably add double hexadecyl
Ditallowdimethyl ammonium bromide 50kg, op-1050kg, after stirring 40 minutes, add 300kg sodium petroleum sulfonate (ShaoXing,ZheJiang county south
Petrochemical industry company limited), continuous stirring 30 minutes, that is, obtain detergent product of the present invention.
Take this detergent product, be added in fracturing fluid, make washing oil agent concentration be 0.1wt%.The interface of measurement fracturing fluid
Tension force is 4.5mn/m, and contact angle is 12 °.By fracturing fluid be added to containing with embodiment 1 with batch saturated core (core parameters:
Sandstone, diameter 24.99mm, length 49.98mm, permeability 1.1346md, porosity 12.83%) device for washing oil in, imbibition one
After week, washing oil rate is 38%.
Embodiment 3
In 2m3Reactor in, add 500kg tap water, be stirred at room temperature, simultaneously disposably add double hexadecyl
Ditallowdimethyl ammonium bromide 80kg, aliphatic alcohol polyethenoxy (7) ether (aeo-7) (Guangzhou Rui Yang surfactant company limited) 50kg
After stirring 20 minutes, add 300kg octyl sulfonic acid salt (Guangzhou Rui Yang surfactant company limited), 40 points of continuous stirring
Clock, that is, obtain detergent product of the present invention.
Take this detergent product appropriate, be added in fracturing fluid, make washing oil agent concentration be 0.12wt%.Measurement fracturing fluid
Interfacial tension is 5.2mn/m, and contact angle is 18 °.By fracturing fluid be added to containing saturated core (core parameters: carbonate rock, directly
Footpath 25.02mm, length 50.33mm, permeability 0.1637md, porosity 8.31%) device for washing oil in, washing oil after imbibition one week
Rate is 31%.
Comparative example 5
Without the detergent of the present invention in the fracturing fluid that embodiment 3 uses, criticize rock core (rock cores using same with embodiment 3
Parameter: carbonate rock, diameter 25.04mm, length 51.19mm, permeability 0.1845md, porosity 7.18%) tested,
The washing oil rate measuring fracturing fluid under the same terms is 16%.
Embodiment 3 and comparative example 5 take tight carbonate as experiment rock core using scene.With the addition of detergent of the present invention
The displacement efficiency of fracturing fluid improves 15% than the washing oil rate of comparative example 6 fracturing fluid.It can be seen that, this detergent is to sandstone and carbonate
Rock core all can improve washing oil rate.
Embodiment 4
In 2m3Reactor in, add 500kg tap water, be stirred at room temperature, disposable add two bromo-two (diformazan
Base dodecyl) fourth diammonium (Yixing City Chemistry Plant) 60kg, laureth (Shandong Pai Ni Chemical Co., Ltd.)
70kg, after stirring 30 minutes, addition 340kg sodium heavy alkyl benzene sulfonate (Hua Li Chemical Co., Ltd.), continuous stirring 30 minutes, that is,
Obtain detergent product of the present invention.
Take this detergent product appropriate, be added in fracturing fluid, make washing oil agent concentration be 0.085wt%.Measurement fracturing fluid
Interfacial tension be 5.3mn/m, contact angle be 13 °.Fracturing fluid is added to containing saturated core (core parameters: sandstone, diameter
25.05mm, length 50.87mm, permeability 1.1254md, porosity 12.23%) device for washing oil in, washing oil after imbibition one week
Rate is 33%.
Embodiment 5
With the addition of fracturing fluid and the test rock core (core parameters: sandstone, diameter of detergent using embodiment 4 identical
25.21mm, length 50.20mm, permeability 1.2486md, porosity 12.35%), simply fracturing fluid is added to containing saturation
It is heated to 60 DEG C, at such a temperature washing oil rate 40% after imbibition one week before the device for washing oil of rock core.
Embodiment 6
In 2m3Reactor in, add 500kg tap water, be stirred at room temperature, disposable add double dimethyl
Ammonium chloride (Yixing City Chemistry Plant) 60kg, (the auspicious ocean in Guangzhou surfactant has aliphatic alcohol polyethenoxy (7) ether (aeo-7)
Limit company) 50kg, after stirring 30 minutes, add 320kg α-sodium olefin sulfonate (Taiyuan Fa Kai Chemical Co., Ltd.), continuous stirring
40 minutes, that is, obtain detergent product of the present invention.
Take this detergent product appropriate, be added in fracturing fluid, make washing oil agent concentration be 0.13wt%.Measurement fracturing fluid
Interfacial tension is 4.9mn/m, and contact angle is 16 °.Fracturing fluid is added to containing saturated core (core parameters: sandstone, diameter
25.00mm, length 50.46mm, permeability 1.2137md, porosity 13.03%) device for washing oil in, washing oil after imbibition one week
Rate is 35%.
Embodiment 7
The detergent of above-described embodiment 1 is used for long *-* * well pressing crack construction.3940 meters of this well depth, is tight sand storage
Layer, mean permeability in below 0.1md, all no obvious effect of increasing production of this block Lin Jing 3 mouthfuls of pressure break.This well was on April 4th, 1
Carry out pressure break, pressure break formula of liquid contains: the detergent of 0.3wt% hydroxypropyl guar gum hydroxyl (hpg)+0.3wt% embodiment 1 preparation+
0.5wt% clay stabilizer+0.01wt% regulator, total liquid measure 1809.6m of constructing3, total sand amount 62.6m3, maximum pressure of constructing
82.1mpa, operational discharge capacity 4.3-6.5m3/ min, open flow discharge opeing after pressure, current 3mm oil nozzle, oil pressure 4mpa, produces liquid 8m daily3/ d, contains
Water rate 45%.Add up oil-producing 102 side, current stable yields is in 3m after January3/ d, effect of increasing production and stable yields effect substantially, are this operation areas
Effect of increasing production well is obtained after reservoir first pressure.
From above example and comparative example result, the detergent that the present invention provides has reduction interfacial tension and pressure
Split that liquid compatibility is good, high financial profit the features such as, only can need to be shown using minimal amount (in fracturing fluid interpolation 0.1wt% about)
Write and improve washing oil effect.
Although the present invention is described in detail, it will be understood by those skilled in the art that in spirit and scope of the invention
Modification will be apparent from.However, it should be understood that each side of present invention record, different specific embodiment
Each several part and the various features enumerated can be combined or all or part of exchange.In each above-mentioned specific embodiment, that
A little embodiments with reference to another embodiment can suitably be combined with other embodiment, and this is by by this area skill
Art personnel are to understand.Additionally, it will be understood to those of skill in the art that description above is only the mode of example, not purport
Limiting the present invention.
Claims (12)
1. a kind of wellfracturing detergent, lives including sulfonate type anion surfactant, cationic gemini surface
Property agent, Polyoxyethylene Ether Nonionic Surfactant and water.
2. detergent according to claim 1 is it is characterised in that be based on described detergent weight meter, described detergent bag
Contain:
3. detergent according to claim 2 is it is characterised in that be based on described detergent weight meter, described detergent bag
Contain:
Sulfonate type anion surfactant 20～40wt%, preferably 25～36wt%；
Cationic gemini surfactant 2～15wt%, preferably 3～12wt%；
Polyoxyethylene Ether Nonionic Surfactant 2～20wt%, preferably 3～12wt%；With
The water of surplus.
4. the detergent according to any one of claim 1-3 is it is characterised in that be based on described detergent weight meter, institute
State sulfonate type anion surfactant: cationic gemini surfactant: Polyoxyethylene Ether non-ionic surface is lived
Property agent weight than be (3.6～7): (0.8～1.8): 1；Preferably sulfonate type anion surfactant: cationic
The weight of gemini surfactant is than for 3.7～6.5: 1.
5. the detergent according to any one of claim 1-4 is it is characterised in that be based on described detergent weight meter, institute
State detergent to comprise:
Sulfonate type anion surfactant 28～32wt%；
Cationic gemini surfactant 4～8wt%；
Polyoxyethylene Ether Nonionic Surfactant 4～8wt%；With
The water of surplus.
6. the detergent according to any one of claim 1-5 it is characterised in that
Described sulfonate type anion surfactant is selected from octyl sulfonic acid salt, dodecyl benzene sulfonate, petroleum sulfonate, weight
At least one in alkylbenzenesulfonate and α olefin sulfonate, preferably octyl sulfonic acid salt, dodecyl benzene sulfonate and oil
At least one in sulfonate, more preferably dodecyl benzene sulfonate；
Described cationic gemini surfactant be selected from the own diammonium of bromination dimethyl, DHAB,
Double dodecyldimethylamine base ammonium bromide, double dodecyl dimethyl ammonium chloride, two bromo-two (dimethyl dodecyl base) fourth diammonium
With at least one in two bromo-two (dimethyl dodecyl base) propane-diammoniums, preferably double hexadecyl trimethylammonium bromide and two
Bromo-two (dimethyl dodecyl base) fourth diammonium, more preferably DHAB；And/or
Described Polyoxyethylene Ether Nonionic Surfactant be selected from alkylphenol polyoxyethylene, fatty alcohol-polyoxyethylene ether, third
At least one in glycol polyoxyethylene poly-oxygen propylene aether and alkylolamideses polyoxyethylene ether, is preferably selected from polyoxyethylene nonyl phenyl second
At least one in alkene ether, aliphatic alcohol polyethenoxy (7) ether and laureth, more preferably Nonyl pheno
Ether.
7. the preparation method of the detergent according to any one of claim 1-6, comprising: by sulfonate type anionic surface
Activating agent and cationic gemini surfactant are added to the water, and after stirring certain time, preferred 20-60min, add poly-
Oxygen vinyl ether type nonionic surfactant, continues stirring, obtains described detergent.
8. a kind of fracturing fluid, including basic fracturing fluid and the detergent as any one of claim 1-6, preferably includes base
It is calculated as the described detergent of 0.05-0.2wt% in described fracturing fluid weight, more preferably include being calculated as based on described fracturing fluid weight
The described detergent of 0.08-0.14wt%.
9. fracturing fluid according to claim 8 it is characterised in that described fracturing fluid oil water interfacial tension 10mn/m with
Under, described fracturing fluid is in rock surface contact angle below 30 °.
10. fracturing fluid according to claim 8 or claim 9 is it is characterised in that described basis fracturing fluid comprises:
Hydroxypropyl guar gum or modified polyacrylamide: 0.05～0.15wt%,
Clay stabilizer: 0.3～1.2wt%,
Cleanup additive: 0.3～1.0wt%,
Regulator: 0～1.2wt%, and
Cross-linking agent: 0～1.2wt%.
11. detergents according to any one of claim 1-6 are in wellfracturing construction, especially in compact oil reservoir volume
Application in pressure break, displaces the application in the construction of trap remaining oil particularly in compact oil reservoir by imbibition effect.
A kind of 12. compact oil reservoir volume fracturing methods, comprise the following steps:
The basic fracturing fluid of i configuration；
Detergent according to any one of claim 1-6 is added to described basis pressure with the amount of 0.05-0.2wt% by ii
Split in liquid；
Iii carries out pressing crack construction according to volume fracturing program, and the described fracturing fluid that step ii is obtained is pumped to stratum, and pressure break is applied
Work carries out the row's of returning operation after terminating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610584259.4A CN106350048B (en) | 2016-07-22 | 2016-07-22 | A kind of wellfracturing detergent and its preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610584259.4A CN106350048B (en) | 2016-07-22 | 2016-07-22 | A kind of wellfracturing detergent and its preparation method and application |
Publications (2)
| Publication Number | Publication Date |
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| CN106350048A true CN106350048A (en) | 2017-01-25 |
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| CN108485627B (en) * | 2018-04-28 | 2020-06-09 | 西南石油大学 | Preparation of clay anti-swelling agent with oil washing effect for water injection |
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| CN115851251A (en) * | 2021-09-23 | 2023-03-28 | 中国石油天然气股份有限公司 | Fracturing oil displacement agent and preparation method and application thereof |
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