CN107880868A - A kind of pressure break control water nanoemulsions and preparation method thereof - Google Patents
A kind of pressure break control water nanoemulsions and preparation method thereof Download PDFInfo
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- CN107880868A CN107880868A CN201711088800.3A CN201711088800A CN107880868A CN 107880868 A CN107880868 A CN 107880868A CN 201711088800 A CN201711088800 A CN 201711088800A CN 107880868 A CN107880868 A CN 107880868A
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- 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
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- 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
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Abstract
The invention provides a kind of pressure break control water nanoemulsions and preparation method thereof.In tight gas wells fracturing process, pressure break control water nanoemulsions inject tight gas reservoir with fracturing fluid, pressure break control water nanoemulsions have hydrophobicity and stable adsorptivity, absorption is on blowhole surface after into stratum, it is water-fastness to wash away, water phase permeability can be greatly lowered, reduction amplitude reaches more than 70%；Very little is influenceed on gas phase permeability, there is selection to sexually revise the characteristic mutually oozed, controls water positive effect；Viscosity is small, and surface tension is low, easily injection, and be particularly suitable for use in tight gas reservoir；Good with reservoir fluid compatibility, shear stability, heat endurance and salt-stable are good.In the case where influenceing very little to gas phase permeability, the purpose of control water is realized.
Description
Technical field
The present invention relates to technical field of oilfield chemistry, in particular to a kind of pressure break control water nanoemulsions and its system
Preparation Method.
Background technology
Hypotonic tight gas reservoir is difficult to obtain industrial gas, the hypotonic tight gas of High water cut before the storey increase designs such as pressure break are not carried out
Can the man-made fracture that well pressure break is formed be easily caused that gas well is aqueous to be risen fast, solve simultaneously after tight gas reservoir gas well fracturing containing waterborne
Rise soon with oil/gas well stimulation problem, this is that domestic and international gas field worker generally wants to solve the problems, such as.As tight gas reservoir reserves exist
Proportion in natural gas energy resource increases severely with day, and the exploitation of compact sandstone gas turns into one of hot issue, is this domestic and international gas field
Worker also increases the research dynamics to tight gas reservoir exploitation.For tight gas wells, if pressure break efficiently control can be developed
Water material, it can control the output water brought by fracturing fracture while pressure break is carried out to gas well, can not only improve gas well
Yield, increase economic benefit, but also the technology for being avoided that the follow-up environmental problem caused by a large amount of output waters and bringing is difficult
Topic.
Fracturing fluid with efficient control water function is one of key issue that tight gas wells implement control water fracturing methods, domestic
Outer associated mechanisms are directed to the research and application of tight gas reservoir control water fracturing technique always.At present, mainly include：Improved polymerization
Thing crosslinking control water fracturing fluid system, to meet the jelly system of water viscosity reduction control of the sand as part proppant is covered as fracturing fluid and using wax
Water Fracturing Technology etc., such as CN101476452A (CN200910020940.6) disclose a kind of oil gas well control hydraulic pressure and split increasing
Production method, it is in pressing crack construction, by the way of chemical degradation cladding blocks, plugged zone, chemical reaction weight is formed in underground
Measuring proportioning is：20~40 parts of 1000 parts of water, paraffin or microwax, 180~360 parts of sand, 3~4 parts of thickening agent, crosslinking agent 7~
9 parts, 0.29~6.6 part of additive.CN102120929A (CN201010609172.0) discloses a kind of preparation of gas-well water controlling agent
Method, including：A, PAMA, cationic polymer and the XY type univalent metal salt cosolvent aqueous solution are mixed equal
Even, stirring forms polymer compositional solution to being completely dissolved；Described PAMA molecular weight be 6,000,000~
20000000；Molecular weight 3,000,000~9,000,000 of described cationic polymer；B, by organic acid esters, carbonate and step a institutes shape
Into polymer compositional solution according to (0.05~0.5)：(0.5~1)：100 mass ratioes compound, and obtain gas-well water controlling agent.
Existing control water fracturing fluid host is mostly high molecular weight polymers, and tight gas reservoir reservoir properties are poor, pore scale
For micro/nano level, and crosslinked polymer system or jelly system particle diameter is big, viscosity is big, thus be not suitable for being used as tight gas reservoir control
Water fracturing fluid.
The content of the invention
In view of this, a kind of the defects of the technical problem to be solved in the present invention is to overcome prior art, there is provided pressure break
Control water nanoemulsions.In pressure break control water nanoemulsions, by weight, including：
20~40 parts of oil phase,
10~30 parts of emulsifying agent,
1~20 part of assistant for emulsifying agent.
In some embodiments, by weight, the oil phase includes 20~40 parts of dialkyl polydimethylsiloxanes；
The molecular weight of the dialkyl polydimethylsiloxane is 3800~50000；Its hydroxy radical content is：6.0~
12.0%.
In some embodiments, by weight, the oil phase includes 25~35 parts of dialkyl polydimethylsiloxanes；
The molecular weight of the dialkyl polydimethylsiloxane is 16000~28000；Its hydroxy radical content is：8.0~
10.0%,
In some embodiments, by weight, the emulsifying agent include 15~20 parts of APESs and
The compound of polyoxyethylene carboxylate；The mass ratio of the APES and the polyoxyethylene carboxylate
Scope is：4:1~1:2.
In some embodiments, the APES includes any one in NP-10, NP-12, NP-13
Kind or any several combination.
In some embodiments, the polyoxyethylene carboxylate includes OEO-103 and/or OEO-105.
In some embodiments, the APES is NP-10；The polyoxyethylene carboxylate is
OEO-103；
The NP-10 and the OEO-103 mass ratio range is：5:2~5:3.
In some embodiments, the cosolvent includes any one in normal propyl alcohol, n-butanol, n-propylamine, n-butylamine
Kind is any several.
In some embodiments, by weight, the cosolvent includes 5 parts of normal propyl alcohols.
The preparation method of this kind of pressure break control water nanoemulsions, comprises the following steps：Emulsifying agent, assistant for emulsifying agent are added to
In oil phase, 20~40min is stirred under room temperature, 100r/min；Then, will under 20~80 DEG C, 200~800r/min stirrings
Deionized water is uniformly instilled in 10~20min in the oil phase mixed, continues 30~60min of stirring, that is, obtains pressure break control water
Use nanoemulsions.
Beneficial effects of the present invention are as follows：
Become the heat of exploration and development with the unconventionaloil pool such as continuous decline, hypotonic tight gas of conventional gas and oil yield
Point, the hypotonic tight gas aboundresources in China, it is concentrated mainly on the Main Basins such as Erdos, pine the Liao Dynasty, Sichuan and Tarim Basin, technology
Mining resources amount reaches 12 × 1013m3。
Hypotonic tight gas reservoir shows the features such as low-porosity, low-permeability, high-moisture, high capillary pressure.High water cut
Generally there is the problem of aqueous rising is fast, production decline is rapid after pressure break in hypotonic tight gas wells.Pressure break control provided by the invention
Water can effectively solve the contradiction for controlling water and pressure break with nanoemulsions.The output water that fracturing fracture is brought not only can be effectively controlled,
Gas well yield can also be improved, increases economic benefit, avoids the problem of a large amount of output water process.
In tight gas wells fracturing process, pressure break control water nanoemulsions inject tight gas reservoir, nanometer control water with fracturing fluid
Emulsion has hydrophobicity, into stratum after absorption in rock surface, water phase permeability can be greatly lowered, reduction amplitude reaches
More than 70%；Very little is influenceed on gas phase permeability, there is selection to sexually revise the characteristic mutually oozed, controls water positive effect；Viscosity is small, table
Face tension force is low, easily injection, and be particularly suitable for use in tight gas reservoir；It is good with reservoir fluid compatibility, shear stability, heat endurance and salt
Have good stability.While gas phase permeability is not influenceed, the purpose of control water is realized.
Generally, there is following technical advantage in pressure break control water nanoemulsions provided by the invention：
1. hydrophobicity, control water effect is high, and water phase permeability reduces amplitude and reaches more than 70%
2. surface tension is low
3. endurance of cutting and flushing resistance are good
4. temperature tolerance and good salt tolerance.
In summary, the special structure of pressure break control water nanoemulsions of the present invention, it has the advantages of above-mentioned many and reality
With value, and it there are no similar method in like product and publish or use and really belong to innovation, generate handy and real
Effect, the preparation method of more existing control water material have the multinomial effect promoted, so as to more be suitable to practicality, and had
Extensive industrial value.
Brief description of the drawings
It should be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore it is not construed as to model
The restriction enclosed, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these
Accompanying drawing obtains other related accompanying drawings.
Fig. 1 is the electromicroscopic photograph of the embodiment of the present invention 1.
Embodiment
Hereinafter, the disclosure is described more fully with embodiment.The disclosure can have various embodiments, and can be at it
In adjust and change.It should be understood, however, that：It is limited to particular implementation disclosed herein in the absence of by the various embodiments of the disclosure
The intention of example, but the disclosure should be interpreted as to covering all tune in the spirit and scope for the various embodiments for falling into the disclosure
Whole, equivalent and/or alternative.
Hereinafter, disclosed in the term " comprising " that can be used in the various embodiments of the disclosure or " may include " instruction
Function, operation or the presence of element, and do not limit the increase of one or more functions, operation or element.In addition, such as exist
Used in the various embodiments of the disclosure, term " comprising ", " having " and its cognate are meant only to represent special characteristic, number
Word, step, operation, the combination of element, component or foregoing item, and be understood not to exclude first one or more other
Feature, numeral, step, operation, element, component or foregoing item combination presence or one or more features of increase, numeral,
Step, operation, element, component or foregoing item combination possibility.
In the various embodiments of the disclosure, stating "or" or " at least one in A or/and B " includes what is listed file names with
Any combinations of word or all combinations.For example, " A or B " or " at least one in A or/and B " may include A, Ke Bao for statement
Include B or may include A and B both.
The statement (" first ", " second " etc.) used in the various embodiments of the disclosure can be modified in various implementations
Various element in example, but respective sets can not be limited into element.For example, presented above be not intended to limit the suitable of the element
Sequence and/or importance.The purpose presented above for being only used for differentiating an element and other elements.For example, the first user fills
Put and indicate different user device with second user device, although the two is all user's set.For example, each of the disclosure is not being departed from
In the case of the scope of kind embodiment, the first element is referred to alternatively as the second element, and similarly, the second element is also referred to as first
Element.
It should be noted that：, can be by the first composition member if an element ' attach ' to another element by description
Part is directly connected to the second element, and " connection " the 3rd can be formed between the first element and the second element
Element.On the contrary, when an element " being directly connected to " is arrived into another element, it will be appreciated that be in the first element
And second be not present the 3rd element between element.
The term used in the various embodiments of the disclosure is only used for describing the purpose of specific embodiment and not anticipated
In the various embodiments of the limitation disclosure.As used herein, singulative is intended to also include plural form, unless context is clear
Chu it is indicated otherwise.Unless otherwise defined, all terms (including the technical term and scientific terminology) tool being otherwise used herein
There is the implication identical implication that the various embodiment one skilled in the art with the disclosure are generally understood that.The term
(term such as limited in the dictionary typically used) is to be interpreted as having and the situational meaning in correlative technology field
Identical implication and the implication with Utopian implication or overly formal will be not construed as, unless in the various of the disclosure
It is clearly defined in embodiment.
The invention provides pressure break control water nanoemulsions, by weight, including：
20~40 parts of oil phase,
10~30 parts of emulsifying agent,
1~20 part of assistant for emulsifying agent,
20~80 parts of deionized water.
In tight gas wells fracturing process, pressure break control water nanoemulsions provided by the invention inject tight gas with fracturing fluid
Hide, pressure break control water nanoemulsions have hydrophobicity and strong adsorptivity, into stratum after absorption in rock surface, can significantly drop
Low water phase permeability, reduction amplitude reach more than 70%；Very little is influenceed on gas phase permeability, there is selection to sexually revise the spy mutually oozed
Property, control water positive effect；Viscosity is small, and surface tension is low, easily injection, and be particularly suitable for use in tight gas reservoir；With reservoir fluid compatibility
Good, shear stability, heat endurance and salt-stable are good.While gas phase permeability is not influenceed, the mesh of control water is realized
's.
In some embodiments of the invention, by weight, the oil phase includes 20~40 parts of dihydroxy polydimethyl silicon
Oxygen alkane；
The molecular weight of the dialkyl polydimethylsiloxane is 3800~50000；Its hydroxy radical content is：6.0~
12.0%.
In some embodiments of the invention, by weight, the oil phase includes 25~35 parts of dihydroxy polydimethyl silicon
Oxygen alkane；
The molecular weight of the dialkyl polydimethylsiloxane is 16000~28000；Its hydroxy radical content is：8.0~
10.0%,
In some embodiments of the invention, by weight, the emulsifying agent includes 15~20 parts of alkylphenol-polyethenoxies
The compound of ether and polyoxyethylene carboxylate；The quality of the APES and the polyoxyethylene carboxylate
Proportion is：4:1~1:2.
In some embodiments of the invention, the APES includes appointing in NP-10, NP-12, NP-13
Anticipate a kind of or any several combination.
In some embodiments of the invention, the polyoxyethylene carboxylate includes OEO-103 and/or OEO-105.
In some embodiments of the invention, the APES is NP-10；The polyoxyethylene carboxylate
For OEO-103；
The NP-10 and the OEO-103 mass ratio range is：5:2~5:3.
In some embodiments of the invention, the cosolvent includes appointing in normal propyl alcohol, n-butanol, n-propylamine, n-butylamine
Anticipate a kind of or any several.
In some embodiments of the invention, by weight, the cosolvent includes 5 parts of normal propyl alcohols.
Present invention also offers the preparation method of this kind of pressure break control water nanoemulsions, comprise the following steps：By emulsifying agent,
Assistant for emulsifying agent is added in oil phase, and 20~40min is stirred under room temperature, 100r/min；Then at 20~80 DEG C, 200~800r/
Under min stirrings, deionized water is uniformly instilled in 10~20min in the oil phase mixed, continues 30~60min of stirring, i.e.,
Obtain pressure break control water nanoemulsions.
Embodiment 1
At room temperature, 20.0g dialkyl polydimethylsiloxanes are taken, hydroxy radical content is：8.0%, molecular weight 16000 will
5.0g APESs NP-10,2.0g polyoxyethylene carboxylate OEO-103,5.0g normal propyl alcohol is added to dihydroxy
In dimethyl silicone polymer, 30min is stirred under 100r/min, then at 50 DEG C, under 400r/min stirrings, by 33.0g go from
Sub- water is uniformly instilled in oil phase in 15min, obtains transparent homogeneous liquid, as pressure break control water nanoemulsions.
Embodiment 2
At room temperature, 20.0g dialkyl polydimethylsiloxanes are taken, hydroxy radical content is：12.0%, molecular weight 50000 will
6.2g APESs NP-10,3.0g polyoxyethylene carboxylate OEO-103,6.0g n-butanol is added to dihydroxy
In dimethyl silicone polymer, 30min is stirred under 100r/min, then at 80 DEG C, under 800r/min stirrings, by 40.0g go from
Sub- water is uniformly instilled in oil phase in 15min, obtains transparent homogeneous liquid, as pressure break control water nanoemulsions.
Embodiment 3
At room temperature, 20.0g dialkyl polydimethylsiloxanes are taken, hydroxy radical content is：8.0%, molecular weight 50000 will
4.0g APESs NP-12,4.0g polyoxyethylene carboxylate OEO-103,3.0g n-propylamine is added to dihydroxy
In dimethyl silicone polymer, 25min is stirred under 100r/min, then at 40 DEG C, under 500r/min stirrings, by 35.0g go from
Sub- water is uniformly instilled in oil phase in 20min, obtains transparent homogeneous liquid, as pressure break control water nanoemulsions.
Embodiment 4
At room temperature, 20.0g dialkyl polydimethylsiloxanes are taken, hydroxy radical content is：10.0%, molecular weight 16000 will
2.0g APESs NP-10,2.0g APES NP-12,3.3g polyoxyethylene carboxylate OEO-
103,2.0g normal propyl alcohols, 3.0 n-propylamines are added in dialkyl polydimethylsiloxane, 20min are stirred under 100r/min, so
Afterwards under 30 DEG C, 300r/min stirrings, 28.0g deionized waters are uniformly instilled in oil phase in 10min, obtained transparent homogeneous
Liquid, as pressure break control water nanoemulsions.
Embodiment 5
At room temperature, 20.0g dialkyl polydimethylsiloxanes are taken, hydroxy radical content is：12.0%, molecular weight 35000 will
2.0g APESs NP-12,1.0g APES NP-13,3.0g polyoxyethylene carboxylate OEO-
103,2.0g normal propyl alcohols, 2.0 n-butylamines are added in dialkyl polydimethylsiloxane, 35min are stirred under 100r/min, so
Afterwards under 60 DEG C, 300r/min stirrings, 31.0g deionized waters are uniformly instilled in oil phase in 10min, obtained transparent homogeneous
Liquid, as pressure break control water nanoemulsions.
Experimental result is as follows：
1st, pressure break control water nanoemulsions basic performance：
Take 0.3 part of pressure break control water of embodiment 1~5 to be added with nanoemulsions into 100 parts of water, be well mixed, obtain homogeneous
Transparent liquid, difference mini-frac liquid particle diameter distribution, surface tension, endurance of cutting energy, heat resistance, salt resistant character and drag reduction
Performance, experiment condition and the experimental results are shown inthe following table, wherein, normal saline solution formula is：2%KCl+5.5%NaCl+0.45%
MgCl2+ 0.55%CaCl2。
Pressure break control water is small with nanoemulsions particle diameter it can be seen from table, and surface tension is low, shows excellent endurance of cutting
Energy, heat resistance and salt resistant character.
2nd, pressure break control water nano-emulsion hydraulic control water effect
0.3 part of pressure break control water of embodiment 1~5 is taken to be added with nanoemulsions into 100 parts of water, to pressure break control water nano-emulsion
Liquid is evaluated the effect of gas well control water, and experimental method is according to professional standard SY/T5358-2012《Reservoir sensitivity flows
Experimental evaluation method》
Carry out, the experimental results are shown inthe following table.
Entered by pressure break control water it can be seen from table with nanoemulsions behind stratum and adsorbed on blowhole surface, can larger amplitude
Degree reduces water phase permeability, decreases by more than 70%；And it is smaller on gas phase permeability influence, fall is controlled below 5%,
With preferable control water effect.
Claims (10)
- A kind of 1. pressure break control water nanoemulsions, it is characterised in that：By weight, including：20~40 parts of oil phase,10~30 parts of emulsifying agent,1~20 part of assistant for emulsifying agent,20~80 parts of deionized water.
- 2. pressure break control water nanoemulsions as claimed in claim 1, it is characterised in that：By weight, the oil phase includes 20~40 parts of dialkyl polydimethylsiloxanes；The molecular weight of the dialkyl polydimethylsiloxane is 3800~50000；Its hydroxy radical content is：6.0~12.0%.
- 3. pressure break control water nanoemulsions as claimed in claim 2, it is characterised in that：By weight, the oil phase includes 25~35 parts of dialkyl polydimethylsiloxanes；The molecular weight of the dialkyl polydimethylsiloxane is 16000~28000；Its hydroxy radical content is：8.0~10.0%.
- 4. pressure break control water nanoemulsions as claimed in claim 1, it is characterised in that：By weight, the emulsifying agent bag Include the compound of 15~20 parts of APESs and polyoxyethylene carboxylate；The APES and institute The mass ratio range for stating polyoxyethylene carboxylate is：4:1~1:2.
- 5. pressure break control water nanoemulsions as claimed in claim 4, it is characterised in that：The APES includes Any one in NP-10, NP-12, NP-13 or any several combination.
- 6. pressure break control water nanoemulsions as claimed in claim 4, it is characterised in that：The polyoxyethylene carboxylate includes OEO-103 and/or OEO-105.
- 7. pressure break control water nanoemulsions as claimed in claim 4, it is characterised in that：The APES is NP-10；The polyoxyethylene carboxylate is OEO-103；The NP-10 and the OEO-103 mass ratio range is：5:2~5:3.
- 8. pressure break control water nanoemulsions as claimed in claim 1, it is characterised in that：The cosolvent includes normal propyl alcohol, just In butanol, n-propylamine, n-butylamine any one or it is any several.
- 9. pressure break control water nanoemulsions as claimed in claim 8, it is characterised in that：By weight, the cosolvent bag Include 5 parts of normal propyl alcohols.
- A kind of 10. preparation method of pressure break control water nanoemulsions, it is characterised in that：Comprise the following steps：By emulsifying agent, help breast Agent is added in oil phase, and 20~40min is stirred under room temperature, 100r/min；Then at 20~80 DEG C, 200~800r/min Under stirring, deionized water is uniformly instilled in 10~20min in the oil phase mixed, continues 30~60min of stirring, that is, obtains Pressure break control water nanoemulsions.
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| CN110344803A (en) * | 2019-06-18 | 2019-10-18 | 中国石油天然气股份有限公司 | A kind of control water fracturing yield increasing method of rock-fragment sandstone bottom water gas-bearing formation |
| CN111236882A (en) * | 2020-01-13 | 2020-06-05 | 西南石油大学 | Capillary blocking completion fluid optimization method protected by dense gas layer |
| CN112280549A (en) * | 2020-09-28 | 2021-01-29 | 长江大学 | Nano emulsion and fracturing method |
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| CN109386252A (en) * | 2018-09-29 | 2019-02-26 | 北京大德广源石油技术服务有限公司 | Water-control fracturing yield increasing method for oil gas well |
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| CN112280549A (en) * | 2020-09-28 | 2021-01-29 | 长江大学 | Nano emulsion and fracturing method |
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