CN108659809A - A kind of concentration liquid making method based on continuous pressure break - Google Patents
A kind of concentration liquid making method based on continuous pressure break Download PDFInfo
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- CN108659809A CN108659809A CN201810381346.9A CN201810381346A CN108659809A CN 108659809 A CN108659809 A CN 108659809A CN 201810381346 A CN201810381346 A CN 201810381346A CN 108659809 A CN108659809 A CN 108659809A
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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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/64—Oil-based compositions
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Abstract
The invention discloses a kind of concentration liquid making methods based on continuous pressure break, are related to high salinity stratum slippery water fracturing technique field.Include the following steps and is prepared：1）The optimal selection of oily item；2) concentrate charging sequence is selected, charging sequence is followed successively by decentralized medium, and stabilizer, extracting and cutting agent, then friction reducer is emulsifier again；3）Optimal selection 3# white oils are 30% in the content of concentrate；4）Optimal selection stabilizer is 1.5% in the content of concentrate；5）Optimal selection extracting and cutting agent is 2% in the content of concentrate；6）Optimal selection friction reducer is 40% in the content of concentrate；7）Optimal selection emulsifier is 3% in the content of concentrate；8）It carries out producing concentrate by the proportioning content of above-mentioned steps.This method is prepared accurately, and proportioning is reasonable, and the concentrate stability prepared is good, and hydration rate is fast, and viscosity is low.
Description
Technical field
The present invention relates to high salinity stratum slippery water fracturing technique fields.
Background technology
Also in initial stage, the mining type of shale gas is mainly hydraulic fracturing technology for the exploitation of China's shale gas.This
Kind so-called hydraulic fracturing technology refers to then pressing off stratum and splitting by the way that fracturing fluid to be pressed into oil well, generates high water conservancy diversion
The fissure channel of ability reinjects proppant and props up crack, and then improves the recovery ratio of oil gas field.
Hydraulic fracturing technology has feature easy to operate, cheap.
All it is to transport to scene with tank car after in advance preparing fracturing fluid, then with massive hydraulic fracturing vehicle however, general fracturing fluid
Go down with pressing it into.In conventional aqueous fracturing fluid technology, often use hydroxypropyl guar dry powder as thickening agent,
Hydroxypropyl guar is added to after water, in order to allow its aquation completely and reach certain viscosity, is often sufficiently stirred,
And this process is quite time-consuming, this also shows this technology in two steps, and the first step is by guanidine glue and fracturing fluid additive
It is added to the water, then second step is that crosslinking agent and proppant are added after allowing it to be sufficiently stirred aquation to form fracturing fluid.It is this
Conventional fracturing fluid technology is commonly referred to as intermittent fracturing fluid technology, and this technology is mainly after present base prepares liquid, then transports
It is defeated to arrive well head, bottom is pressed by pressure break and is gone down, but because the hole condition in each place is different, for item under those Holes of Complicated Wells
The well of part or base apart from oil field it is far will result in some unnecessary wastes, include to preparing fracturing fluid material
Waste, the waste that also freight charges process is generated.Also first match and injects this intermittent fracturing fluid mode afterwards in harsh climate
Under should not also use because the dosage of guanidine glue dry powder is generally very big, Dust Capacity is big, and labor intensity is also very big, if temperature is improper
Or stirring is uneven, just easily causes flake, forms the local frozen glue of fracturing fluid.And this general tank bottom of feeding mode
There will be superfluous fracturing fluid, can not be recycled, this will result in larger waste.
Because there is variety of problems for intermittent fracturing technique, begins to study it both at home and abroad, then develop
Continuous fracturing technique is gone out.Continuous fracturing technique is called Quick mixing technology of doing, and this technology is conventional first to construct again with liquid
Fracturing technique make into it is a kind of while with liquid while carry out pump note continous way fracturing technique, all had been added in the process of construction
Various additives not only can debug raw material and formula for construction at the scene, can also be specific according to practice of construction
Situation can improve pressure break and apply come phenomena such as preparing liquid, the limitation of waste and construction of liquid will not thus occur
The efficiency of work.
The key of continuous water-based fracturing technology is the preparation of concentrate, and there are three marks for the performance of prepared concentrate
Standard, first, its stability, this is the most important condition that concentrate has configured, if stability is bad, will result in guanidine glue thickening agent
The phenomenon that sinking in water, concentrate made to be layered so that the fracturing fluid uneven concentration of formation can thus influence completely
Its fracturing effect keeps pressure break unsuccessful.Second is viscosity, its pumpability of the viscosity influence of concentrate, if viscosity is low, pumpability
It is good.Conversely, will then seriously affect its pumpability.Third performance standard is hydration rate.Hydration rate refers to concentrate
After liquid is added to the water, the speed of viscosity increasement of guanidine glue thickening agent in water, it is desirable to reach continuous water-based fracturing technology, hydration rate ten
Divide key.
Invention content
Technical problem to be solved by the invention is to provide a kind of concentration liquid making method based on continuous pressure break, this method
It prepares accurately, proportioning is reasonable, and the concentrate stability prepared is good, and hydration rate is fast, and viscosity is low.
In order to solve the above technical problems, the technical solution used in the present invention is：A kind of concentrate based on continuous pressure break
Preparation method follows the steps below preparation：
1）The optimal selection of oily item selects the 3# white oils of density minimum as the decentralized medium for preparing concentration fracturing fluid；
2) concentrate charging sequence is selected, charging sequence is followed successively by decentralized medium, stabilizer, extracting and cutting agent, friction reducer, then again
It is emulsifier；
3）Optimal selection 3# white oils are 30% in the content of concentrate；
4）Optimal selection stabilizer is 1.5% in the content of concentrate；
5）Optimal selection extracting and cutting agent is 2% in the content of concentrate；
6）Optimal selection friction reducer is 40% in the content of concentrate；
7）Optimal selection emulsifier is 3% in the content of concentrate；
8）It carries out producing concentrate by the proportioning content of above-mentioned steps.
The technical solution advanced optimized is the step 4）In stabilizer be organoclay polymer stabilizer.
The technical solution advanced optimized is the step 5）In extracting and cutting agent be triethylene glycol butyl ether.
The technical solution advanced optimized is the step 7）In emulsifier be composition be sorbitan fatty acid
This Pan 80 of ester.
It is using advantageous effect caused by above-mentioned technical proposal：The present invention combination prior art carries out researching and developing various examinations
The shared proportioning of agent finally selectes its fixed charging sequence and proportion by repetition test data comparison, and oil is first added
Phase（3# white oils）30%, add polymer stabilizer（Organoclay）1.5%, extracting and cutting agent（Triethylene glycol butyl ether）2%, friction reducer
40%, it is eventually adding emulsifier（span-80）3%.The concentrate that the present invention prepares return row it is efficient, up to 80 percent with
On, high temperature resistant anti-shear performance is good, and the requirement continuously constructed may be implemented, and encountering any problem in the construction process can be with
When stop, adjustability is high, environmental protection, it is possible to reduce the pollution of environment.
Description of the drawings
Fig. 1 is the preparation process figure of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, the invention discloses a kind of concentration liquid making methods based on continuous pressure break, according to the following steps into
Row is prepared：
1）The optimal selection of oily item selects the 3# white oils of density minimum as the decentralized medium for preparing concentration fracturing fluid；Its pressure break
The preparation of liquid generally uses 0# diesel oil, but the price of 0# diesel oil is more expensive than white oil, white oil it is cheap, source is wide.Therefore it selects
White oil is decentralized medium.And the type of white oil has, have 3# white oils, 5# white oils, 7# white oils, 10# white oils, 15# white oils, 26# white oils,
32# white oils, 36# white oils, 46# white oils, 68# white oils should select the 3# of density minimum to allow friction reducer to have good dissolubility
White oil, and 3# white oils is cheap, source is wide.Therefore, wide using source, cheap and low density 3# white oils, which are used as, matches
The decentralized medium of system concentration fracturing fluid.Because it is found that No. 3 white oils are industrial goods, effect is poor, therefore is purified using distillation.
2) concentrate charging sequence is selected, charging sequence is followed successively by decentralized medium, stabilizer, extracting and cutting agent, friction reducer, so
It is emulsifier again afterwards；It is for raw materials such as white oil, friction reducer, stabilizer, emulsifier, extracting and cutting agents, according to different charging sequence
It is tested, in addition to being white oil according to charging sequence, stabilizer, extracting and cutting agent, then friction reducer is emulsifier again, and others add
Material mode has little particle that cannot dissolve after being added resist.Its different phenomenon is observed, according to its separation time, viscosity etc.
Simple performance test selectes optimal charging sequence, takes preparation performance concentrate up to standard with this, so final determine charging
Sequence is white oil, and stabilizer, extracting and cutting agent, then friction reducer is emulsifier again.
3）Optimal selection 3# white oils are 30% in the content of concentrate；It is according to determining concentrate charging sequence, with white
Oil content is variable quantity, is tested the viscosity of concentrate, stability, finally determines a suitable white oil percentage and contains
Amount；There is the time being layered in the concentrate observation for preparing different white oil contents, and discovery is when the content of white oil is 25% and 30%
It waits, concentrate is layered soon, it may be possible to because oil phase content is very little, prevent stabilizer and friction reducer from abundant aquation, institute
To be layered soon.Separation time is not much different when the content of white oil is 40% and when percentage composition is 30%,
So stability is suitable, but the content that white oil is added is excessive, and the content of friction reducer is just opposite to be reduced, so in the preparation of concentrate
In, the content of white oil is more suitable 30% or so.When white oil content is 30%, there is lamination after 30h.
4）Optimal selection stabilizer is 1.5% in the content of concentrate；The effect of its polymer stabilizer has and can make friction reducer
Aquation makes friction reducer be soluble in concentrate and suspension effect, because containing a large amount of hydroxyl, these hydroxyls in its structure
Base can form hydrogen bond with the oil-phase medium of standing, stabilizer can be connected by hydrogen bond in oil-phase medium, therefore make dense
Contracting liquid becomes the substance of the reticular structure with certain viscosity.Theoretically the concentration of stabilizer is the bigger the better, but in an experiment because
To be limited by various conditions, so it is also critically important to select best polymer stabilizer concentration.With the dosage choosing principles of white oil
It is identical, under conditions of other compositions content is constant, different amounts of stabilizer is added, best percentage composition is obtained with this.It prepares
There is the time being layered in the concentrate of different stabilizers concentration, observation.With the increase of stabiliser content, concentrate is more and more steady
It is fixed, but polymer concentration is more than after 1.5%, and separation time shortens instead, it may be possible to because polymer stabilizer hinders drop
The effect of agent has had reached saturation state, so the suitable concentration of selective polymer stabilizer is 1.5%, when a concentration of 1.5%
When, the time of layering is 34 minutes.
5）Optimal selection extracting and cutting agent is 2% in the content of concentrate；It is added after polymer stabilizer stirring, because of stabilization
The density of agent is larger, therefore stabilizer can't completely suspend in a dispersion medium, this just needs certain specific substance to allow stabilization
Agent suspends, and the amount of selected extracting and cutting agent has decided on whether that polymer stabilizer can be uniformly distributed.Experimental method is to add
After entering stabilizer, be added different amounts of extracting and cutting agent, the static regular hour see stabilizer whether lower layer, selection suitably carries and cutting
The amount of agent carries out next step experiment again；The extracting and cutting agent of different content, influence of the observation extracting and cutting agent content to stabilizer is added.It is carrying
When cutting agent content less than 2%, the phenomenon that polymer stabilizer will appear sedimentation, but when suspending agent concentrations reach 2%, Neng Gourang
The polymer stabilizer of addition suspends completely, so the content for choosing extracting and cutting agent is 2%.
6）Optimal selection friction reducer is 40% in the content of concentrate；The friction reducer of different content is added to concentrate for it, with
The increase of friction reducer content, concentrate is increasingly stablized, and when friction reducer content reaches 50%, concentrate will be equally layered, but
When friction reducer content is 40%, layering is all not apparent within 3 days, so the content of friction reducer is selected as 40%.
7）Optimal selection emulsifier is 3% in the content of concentrate；
It selects suitable emulsifier
Because the HLB value of each emulsifier is different, their emulsifying effectiveness is also different.Suitable emulsifier can improve concentrate
Stability and viscosity.To Span-80, No. 1 emulsifier, master+auxiliary emulsifier, Tween-20, these four emulsifiers are selected.
Select suitable emulsifier ratio
According to the emulsifier having determined, the preparation steps of concentrate are constant, change the addition of various emulsifiers every time,
It is tested for the property to concentrate, finally determines a suitable emulsifier ratio so that make the best concentration of performance
Liquid.
After the different types of emulsifier of same amount is added, has a certain impact to the stability of concentrate, especially exist
After polysorbas20 is added, fast hierarchical, it is suitable to be added separation time after No. 1 emulsifier and master add auxiliary emulsifier, but is added
After Span-80, still without layering after 72h, so the emulsifier selected is Span-80.After determining emulsifier, it is controlled
His dosage of raw material is constant, changes the addition of emulsifier, finally finds, when emulsifier content is 3% or so, concentrate 80h
It is not layered, so choosing the content of emulsifier 3% or so.
8）It carries out producing concentrate by the proportioning content of above-mentioned steps.
The technical solution advanced optimized is the step 4）In stabilizer be organoclay polymer stabilizer.
The technical solution advanced optimized is the step 5）In extracting and cutting agent be triethylene glycol butyl ether.
The technical solution advanced optimized is the step 7）In emulsifier be composition be sorbitan fatty acid
This Pan 80 of ester.
In conclusion obtaining content of drug and charging sequence in concentrate and being：Oil phase is first added（3# white oils）30%, then
Polymer stabilizer is added（Organoclay）1.5%, extracting and cutting agent（Triethylene glycol butyl ether）2%, friction reducer 40%, be eventually adding emulsification
Agent（span-80）3%, product is layered after 10 days.
The present invention combination prior art carries out the shared proportioning of research and development various reagents, by repetition test data comparison, most
Its fixed charging sequence and proportion are selected eventually, and oil phase is first added（3# white oils）30%, add polymer stabilizer（Have
Machine soil）1.5%, extracting and cutting agent（Triethylene glycol butyl ether）2%, friction reducer 40%, be eventually adding emulsifier（span-80）3%.The present invention
The concentrate of preparation returns that row is efficient, and up to 80 or more percent, high temperature resistant anti-shear performance is good, may be implemented continuously to construct
Requirement, encountering any problem in the construction process can stop at any time, and adjustability is high, environmental protection, it is possible to reduce the dirt of environment
Dye.
Claims (4)
1. a kind of concentration liquid making method based on continuous pressure break, it is characterised in that：Follow the steps below preparation：
1）The optimal selection of oily item selects the 3# white oils of density minimum as the decentralized medium for preparing concentration fracturing fluid；
2) concentrate charging sequence is selected, charging sequence is followed successively by decentralized medium, stabilizer, extracting and cutting agent, friction reducer, then again
It is emulsifier；
3）Optimal selection 3# white oils are 30% in the content of concentrate；
4）Optimal selection stabilizer is 1.5% in the content of concentrate；
5）Optimal selection extracting and cutting agent is 2% in the content of concentrate；
6）Optimal selection friction reducer is 40% in the content of concentrate；
7）Optimal selection emulsifier is 3% in the content of concentrate；
8）It carries out producing concentrate by the proportioning content of above-mentioned steps.
2. a kind of concentration liquid making method based on continuous pressure break according to claim 1, it is characterised in that：The step
4）In stabilizer be organoclay polymer stabilizer.
3. a kind of concentration liquid making method based on continuous pressure break according to claim 1, it is characterised in that：The step
5）In extracting and cutting agent be triethylene glycol butyl ether.
4. a kind of concentration liquid making method based on continuous pressure break according to claim 1, it is characterised in that：The step
7）In emulsifier be this Pan 80 that composition is sorbitan fatty ester.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112724956A (en) * | 2021-03-30 | 2021-04-30 | 山东奥必通石油技术股份有限公司 | Preparation method of diesel-based thickening agent for fracturing |
| CN113372516A (en) * | 2021-08-16 | 2021-09-10 | 山东诺尔生物科技有限公司 | Thickener ultrafine powder, giant arm type thickener, preparation method and application thereof |
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