CN110055043A - Multistage targeting Compound-acid and preparation method thereof - Google Patents
Multistage targeting Compound-acid and preparation method thereof Download PDFInfo
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- CN110055043A CN110055043A CN201910410471.2A CN201910410471A CN110055043A CN 110055043 A CN110055043 A CN 110055043A CN 201910410471 A CN201910410471 A CN 201910410471A CN 110055043 A CN110055043 A CN 110055043A
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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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
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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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/528—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
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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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/32—Anticorrosion additives
Abstract
The present invention provides a kind of multistage targeting Compound-acid and preparation method thereof, and according to mass percent, multistage targeting Compound-acid includes following components: inorganic acid 14%~22%, organic acid 10%~15%, surfactant 1%~3%, stabilizer 1%~3%, acidification corrosion inhibitor 1%~3%, surplus are water.Each component is weighed when preparation in proportion, inorganic acid, organic acid, stabilizer, acidification corrosion inhibitor are added to the water, after mixing, surfactant is added, is uniformly mixed again, obtains multistage targeting Compound-acid.The balanced synthesis solvability improved to clay mineral and quartz substrate of Compound-acid energy can preferably improve extra-low-permeability reservoir acidification plugging removal effect.
Description
Technical field
The present invention relates to petroleum technology fields, in particular to a kind of multistage targeting Compound-acid and preparation method thereof.
Background technique
Acidification is to inject acid solution to bottom by oil-water well, the tamper and storage in the operations such as dissolution drilling well, complete well, well workover
Collect layer rock forming mineral, restores and improve the permeance property of reservoir, to reach the measure of the volume increase in oil field, augmented injection.
In the development process in ultra-low penetration oil field, due to stratum quartz content itself is high, physical property poor (low hole, hypotonic),
The reasons such as sensitive minerals content height lead to conventional acidulation not and can effectively solve such oil-water well production contradiction, influence oil well increasing
It produces, water injection well stimulation effect, it is inefficient so as to cause oil well low yield, cause water injection well seriously to short even note not into final to influence
The recovery ratio in oil field.
Meanwhile currently used acidifying solution (such as mud acid) is fast there are action time, the short drawback of operating distance, thus be acidified
Effect is generally poor, not can effectively solve oil reservoir low yield energy, water injection well high pressure caused by matrix reason short or infuse not into etc. ask
Topic.
It should be noted that the information in the invention of above-mentioned background technology part is only used for reinforcing the reason to background of the invention
Solution, therefore may include the information not constituted to the prior art known to persons of ordinary skill in the art.
Summary of the invention
The purpose of the present invention is to provide a kind of multistage targeting Compound-acids and preparation method thereof, solve existing acidifying solution and are directed to
The ineffective problem of ultra-low penetration acidification of oil field.
According to an aspect of the present invention, a kind of multistage targeting Compound-acid is provided, according to mass percent, including with the following group
Point:
Inorganic acid 14%~22%, organic acid 10%~15%, surfactant 1%~3%, stabilizer 1%~3%,
Acidification corrosion inhibitor 1%~3%, surplus are water.
In a kind of exemplary embodiment of the invention, the inorganic acid includes hydrochloric acid, hydrofluoric acid, phosphoric acid, nitrous acid, fluorine
One of boric acid is a variety of.
In a kind of exemplary embodiment of the invention, the inorganic acid includes hydrochloric acid, hydrofluoric acid and phosphoric acid, each component point
10%, 2%~3% and the 5% of the multistage targeting Compound-acid gross mass is not accounted for.
In a kind of exemplary embodiment of the invention, the inorganic acid further includes fluoboric acid, and the fluoboric acid accounts for described
The 4% of multistage targeting Compound-acid gross mass.
In a kind of exemplary embodiment of the invention, the organic acid includes phosphonic acids, sulfamic acid, acetic acid, monoxone
One of or it is a variety of.
In a kind of exemplary embodiment of the invention, the organic acid includes phosphonic acids, sulfamic acid, acetic acid, monoxone
In any two kinds, the gross mass of any two kinds of components accounts for the 10% of the multistage targeting Compound-acid gross mass.
In a kind of exemplary embodiment of the invention, the surfactant includes fluorine carbon, betaines, polyethers
One of class, sulfonated species are a variety of.
In a kind of exemplary embodiment of the invention, the stabilizer includes ethylenediamine tetra-acetic acid, ethylenediamine tetra-acetic acid
One of sodium salt, citric acid, oxalic acid are a variety of.
In a kind of exemplary embodiment of the invention, the acidification corrosion inhibitor include poly-aspartate, in propilolic alcohol extremely
Few one kind.
According to another aspect of the present invention, a kind of preparation method of multistage targeting Compound-acid is provided, comprising:
According to mass percent, following each component: inorganic acid 14.0%~22.0% is weighed respectively, organic acid 10.0%~
15.0%, surfactant 1.0%~3.0%, stabilizer 1.0%~3.0%, acidification corrosion inhibitor 1.0%~3.0%, surplus
For water；
The inorganic acid, organic acid, stabilizer, acidification corrosion inhibitor are added in the water, after mixing, added
The surfactant, is uniformly mixed again, obtains the multistage targeting Compound-acid.
Multistage targeting Compound-acid of the invention is compounded with organic acid and inorganic acid, and living added with stabilizer, surface
Property agent and acidification corrosion inhibitor.On the one hand, multistage targeting Compound-acid has multiple ionization property, is able to maintain work in operation process
The low ph value of liquid long period, to extend the acidification time, i.e. extension acidification distance, expansion is acidified plug removal radius,
Prevent or reduce acidification secondary precipitation injury.On the other hand, multistage targeting Compound-acid balanced can be improved to clay mineral and stone
The synthesis solvability of English matrix can preferably improve ultra-low penetration oil in particular for the dissolution of ultra-low penetration quartz substrate
Hiding acidification plugging removal effect.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
It can the limitation present invention.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.It should be evident that the accompanying drawings in the following description is only the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the preparation method flow chart of the multistage targeting Compound-acid of the present invention；
Fig. 2 multistage targets Compound-acid pH with the variation of lye dosage；
Fig. 3, which is that the present invention is multistage, targets Compound-acid true core dissolved corrosion test.
In figure: 1, high pressure constant-flux pump；2, high-viscosity pump；3, intermediate receptacle；4, rock core chucking device；5, effluent receives
Device；6, pressure sensor；7, pressure display instrument；8, manograph；9, insulating box.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the present invention will
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Identical attached drawing in figure
Label indicates same or similar structure, thus the detailed description that will omit them.
Current oil field ultra-low penetration oil field oil water well acidizing block releasing technique is analyzed, common problem mainly has following three
Point: first is that with sour contradictory problems.Acid solution is mainly consumed in reacts with clay, and the acidizing effect for quartz substrate is caused to become
Difference may cause excessive corrosion of the acid solution to cement if increasing substantially acid strength and dosage, cause formation sand production,
The secondary injuries such as collapsing.Second is that sour rock Chemical Kinetics and the anti-row's problem of residual acid.Working solution must be to stratum clay, calking
Object and quartz have stronger solvability, therefore, general in working solution all to use hydrofluoric acid, still, when the work of hydrofluoric acid containing
Make liquid and above-mentioned reactant reaction to a certain extent, with the consumption of acid solution, working liquid ph will constantly rise, and surpass when pH value rises
Certain value is crossed, will originally be formed and precipitated in the ionic compound (such as fluoride) of free state, cause more serious secondary precipitation
Therefore injury keeps the low ph value of working solution long period and efficiently the residual anti-drainage technique of acid solution shows important especially.Third is that ultra-low penetration
Generally low hole, hypotonic, matrix are the soil based on " hydrochloric acid+hydrofluoric acid " the main reason for causing oil-water well to produce contradiction in oil field
The drawbacks such as acid solution is fast there are action time, operating distance is short, thus acidizing effect is generally poor, not can effectively solve matrix original
Because caused by oil reservoir low yield energy, fill the water short or infuse into high pressure not into the problems such as.
A kind of multistage targeting Compound-acid is provided in embodiment of the present invention, according to mass percent, including following components:
Inorganic acid 14%~22%, organic acid 10%~15%, surfactant 1%~3%, stabilizer 1%~3% are acidified inhibition
Agent 1%~3%, surplus are water.
On the one hand multistage targeting Compound-acid is able to maintain the low pH system environment of acidization long period, extend acid solution and make
Therefore it can preferably be overcome with time and acidification distance and use sour contradiction, especially there is better " deep to quartz substrate
Etching " effect, and low ph conditions can effectively prevent fluoride two, three times precipitating blocking.On the other hand, addition uses in acid solution
Surfactant, stabilizer and corrosion inhibiter play the formation acidification by-product such as improve the anti-row's effect of residual acid, prevent iron gel
And inhibition protection pit shaft and downhole tool, acid filling tool etc..In another aspect, the preparation method of multistage targeting Compound-acid is simple,
Using effect is good, especially for ultra-low penetration oil field, can be realized oil-water well increasing yield and injection, to improve oil recovery.
The multistage targeting Compound-acid of embodiment of the present invention is described in detail below:
In the present embodiment, inorganic acid can be below one or more: hydrochloric acid, hydrofluoric acid, phosphoric acid, nitrous acid,
Fluoboric acid.Organic acid can be below one or more: phosphonic acids, sulfamic acid, acetic acid, monoxone.Surfactant can be with
It is below one or more: fluorine carbon, betaines, polyethers, sulfonated species.Stabilizer can be it is below a kind of or
It is a variety of: edta and its sodium salt, citric acid, oxalic acid.Acidification corrosion inhibitor can be below one or more: poly- asparagus fern
Propylhomoserin, propilolic alcohol.
Inorganic acid and organic acid are main components in Compound-acid.The inorganic acid of present embodiment is acid strong, and solution ration is strong,
There is stronger solvability to sulfide, corrosion product, carbonate tamper.On the one hand the organic acid of present embodiment is used for
Hydrogen ion is provided, acidization of sandstone is played the role of, prevents calcium ion from forming calcium carbonate, is on the other hand then to play slow releasing function,
Achieve the purpose that removing clog in deep reservoir.The surfactant of present embodiment can change surface tension, change reservoir wettability, promote
Anti- row, prevents acid sludge from generating.The stabilizer of present embodiment can ensure that there is Compound-acid preferable temperature stability and pH to stablize
Property, no precipitating generates.For the acidification corrosion inhibitor of present embodiment for alleviating corrosion of the acid solution to pipeline, corrosion mitigating effect is good, and matches
5 property are good.Surfactant, stabilizer and acidification corrosion inhibitor play jointly to be improved the anti-row's effect of residual acid, prevents the acid such as iron gel
Change formation and the inhibition protection pit shaft and downhole tool, acid filling tool etc. of by-product.
Present embodiment additionally provides the preparation method of above-mentioned multistage targeting Compound-acid, referring to Fig.1, specifically according to following step
It is rapid to implement:
Step S100 weighs following each component: inorganic acid 14.0%~22.0% according to mass percent respectively, organic
Acid 10.0%~15.0%, surfactant 1.0%~3.0%, stabilizer 1.0%~3.0%, acidification corrosion inhibitor 1.0%~
3.0%, surplus is water.
Inorganic acid, organic acid, stabilizer, acidification corrosion inhibitor are added to the water by step S200, after mixing, then plus
Enter surfactant, be uniformly mixed again, obtains multistage targeting Compound-acid.
Inorganic acid employed in present embodiment, organic acid, surfactant, stabilizer, acidification corrosion inhibitor are work
Industry grade.Various reagents can be bought by market, can also be prepared by laboratory.
It is titrated and is shown by NaOH solution, the multistage targeting Compound-acid of present embodiment has multiple ionization property, such as Fig. 2
It is shown, it by multiple ionization, can keep for a long time working solution low ph value (being shown in Table 1), extend the reaction time, it is molten to improve rock core
Solution rate improves acidizing effect (being shown in Table 2).
The multistage targeting Compound-acid core damage process pH value measurement test of table 1
1 test result of table explanation, the multistage targeting Compound-acid of the present invention can gradually discharge H+, long period maintenance acid fluid system
Low ph environment improve acidizing effect so as to avoid the generation of the secondary precipitations such as iron ion and fluoride.
Ultra-low penetration block rock core is chosen to crush, filtering, dry, it will be sour under conditions of rock core/acid solution is 1.0g/10ml
Liquid and rock core are placed in closed container, are sufficiently reacted at 60 DEG C, 60r/min, and residual acid solution after a certain period of time is dried with oneself, claimed
The quantitative filter paper of weight filters out solid, calculates rock core dissolution rate.Experiment carries out in constant water bath box.This test points five groups into
Row measures the rock core dissolution rate after acid-rock reaction 1.0h, 2.0h, 3.0h, 4.0h, 5.0h respectively, the results are shown in Table 2.
The test of table 2 differential responses time rock core dissolution rate
By data in table 2 it is found that (1) acid-rock reaction 2.0h, dissolution of the mud acid (+3% hydrofluoric acid of 12% hydrochloric acid) to rock core
Rate height (49.2%), multistage targeting Compound-acid are relatively low to rock core dissolution rate (37.6%)；(2) after acid-rock reaction 2.0h, soil
Acid almost no longer changes rock core solvability, and multistage targeting Compound-acid then continues to keep the solvability to rock core, 4.0h
Dissolution rate is basicly stable afterwards；(3) finally, multistage targeting Compound-acid is higher than mud acid to rock core dissolution rate (61.7%)
(49.7%)；(4) illustrate that multistage targeting Compound-acid action time is longer, operating distance is farther, acidizing effect is more preferable.
Meanwhile multistage targeting Compound-acid provided by the present invention has compared with current conventional soil acid acidizing to quartz
Better solvability, so matrix acidifying effect is more preferable.In general, formation rock mainly contains quartz, feldspar, clay pit
Object etc..Quartz (SiO2) mainly contain Si, and feldspar (Si3AlO8) and clay (Al KNa4Si4O10(OH)8) contain Si, K, Na；Sour rock is anti-
Ying Hou, if detecting Si in the residual acid solution of multistage targeting acid4+Concentration is higher with respect to the residual acid solution of mud acid, and K+、Na+Content is basic
Quite, then illustrate that multistage targeting Compound-acid has better solvability (being shown in Table 3) to quartz.
The different acid solutions of table 3 are to quartz and clay solvability contrast table
As shown in Table 3, each ion concentration variation before and after multistage targeting Compound-acid, mud acid acid-rock reaction: (1) K+And Na+It is total dense
It is substantially suitable to spend increment rate；(2) after multistage targeting Compound-acid acid-rock reaction, Si in solution4+The unconventional mud acid acid of concentration increment rate
Si in solution after rock reaction4+Concentration increment rate.Illustrate: multistage targeting Compound-acid provided by the present invention and conventional mud acid phase
Than having to the better solvability of quartz, so matrix acidifying effect is more preferable.
Therefore, the multistage targeting Compound-acid of the present invention is more suitable for the oil reservoir with following characteristics or oil-water well: reservoir rock
Quartz content is high, permeability is low, ultralow permeability sandstone oil reservoir that porosity is small (such as: quartz content >=30%, permeability≤
0.1×10-3MPa.s, porosity≤12%)；Abnormal low yield Fluid at Poor Oil Well in block；Stake i.e. short or infuse not into or bet
Afterwards water injection pressure rapid increase cause to short or infuse not into water injection well.
The specific practice employed in actual oil field operation is usually: it is compound to prepare multistage targeting in complex acid place
Acid, and shipped with dedicated tank car to construction well site, it is continuously pumped into purpose well (layer) using the dedicated topping-up pump in oil field, at least
Acid solution is headed into earth formation deep by the displacement fluid of 2 times of wellbore volumes, until using clear water after the defined reaction time (generally 2~4h)
Huge discharge (such as: >=500L/min) anti-flushing well, it is almost the same for qualification to be washed till purpose well import and export water quality, after well-flushing, to well head
Without overflow, operating tool string, lower pump production or recovery water filling can be played out.
Several specific embodiments of present embodiment multistage targeting Compound-acid are given below.
Embodiment 1
The multistage targeting Compound-acid of the present embodiment is grouped as by following mass percent group: 10% concentrated hydrochloric acid, 3% hydrogen fluorine
Acid, 5% phosphoric acid, 2% ethylene diamine tetra methylene phosphonic acid, 5% acetic acid, 5% sulfamic acid, 1% dodecyl dimethyl sulfopropyl sweet tea
Dish alkali, 3% citric acid, 1% poly-aspartate, surplus are water.
Wherein, concentrated hydrochloric acid is the hydrochloric acid solution of 31wt%, hydrofluoric acid solution that hydrofluoric acid is 40wt%, phosphoric acid 85wt%
Phosphoric acid solution, acetic acid be 75wt% acetic acid solution.
Embodiment 2
The multistage targeting Compound-acid of the present embodiment is grouped as by following mass percent group: 8% concentrated hydrochloric acid, 2% hydrofluoric acid,
4% phosphoric acid, 3% ethylene diamine tetra methylene phosphonic acid, 5% acetic acid, 7% sulfamic acid, 2% dodecyl dimethyl sulfopropyl beet
Alkali, 3% citric acid, 2% poly-aspartate, surplus are water.
Embodiment 3
The multistage targeting Compound-acid of the present embodiment is grouped as by following mass percent group: 12% concentrated hydrochloric acid, 5% hydrogen fluorine
Acid, 5% phosphoric acid, 2% ethylene diamine tetra methylene phosphonic acid, 3% acetic acid, 7% sulfamic acid, 3% dodecyl dimethyl sulfopropyl sweet tea
Dish alkali, 1% citric acid, 3% poly-aspartate, surplus are water.
Embodiment 4
The multistage targeting Compound-acid of the present embodiment is grouped as by following mass percent group: 10% concentrated hydrochloric acid, 2% hydrogen fluorine
Acid, 5% phosphoric acid, 4% fluoboric acid, 2% ethylene diamine tetra methylene phosphonic acid, 5% monoxone, 5% sulfamic acid, 1.5% heavy alkyl benzene
Sodium sulfonate, 3% oxalic acid, 1.5% propilolic alcohol, surplus are water.
Embodiment 5
The multistage targeting Compound-acid of the present embodiment is grouped as by following mass percent group: 8% concentrated hydrochloric acid, 2% hydrofluoric acid,
3% phosphoric acid, 2% fluoboric acid, 2% ethylene diamine tetra methylene phosphonic acid, 5% monoxone, 6% sulfamic acid, 2% fluorocarbon surfactant
(abbreviation FC-3), 3% ethylenediamine tetra-acetic acid, 2% propilolic alcohol, surplus are water.
Embodiment 6
The multistage targeting Compound-acid of the present embodiment is grouped as by following mass percent group: 12% concentrated hydrochloric acid, 2% nitrous
Acid, 3% phosphoric acid, 3% fluoboric acid, 3% ethylene diamine tetra methylene phosphonic acid, 6% acetic acid, 6% sulfamic acid, 1% alkyl phenol polyoxy second
Alkene ether, 2% ethylenediamine tetra-acetic acid, 2.5% propilolic alcohol, surplus are water.
True core is carried out using the multistage targeting Compound-acid of rock core test device as shown in Figure 3 to the embodiment of the present invention
Dissolved corrosion test, to further illustrate beneficial effects of the present invention.
Test process are as follows: acid solution is delivered to rock core folder using high pressure constant-flux pump 1 and high-viscosity pump 2 after intermediate receptacle 3
Holding equipment 4 makes it successively pass through two blocks of concatenated ultra-low penetration block rock cores, receives each rock core by effluent receiver 5
Effluent calculates permeability.It can use the internal pressure that pressure sensor 6 tests each rock core and pipeline in test, pass through pressure
Power display instrument 7 is shown, and is recorded by manograph 8.Two true cores are respectively positioned in insulating box 9, guarantee acidization
It carries out under constant temperature conditions.
(1) control group is mud acid, including 12% hydrochloric acid, 3% hydrofluoric acid, surplus are water.Experimental group is the more of embodiment 1
Grade targeting Compound-acid.
Test process is as follows:
1. being saturated water flooding, survey water phase permeability (K1)；Control group mud acid is infused, keeps the temperature 5.0 hours in 50 DEG C of insulating boxs；Again
Secondary saturation water flooding is surveyed water phase permeability (K2).Calculate note mud acid reaction front and back permeability increment rate；Parallel laboratory test three times, is counted
Calculate mean permeability increment rate.
2. being saturated water flooding, survey water phase permeability (K1)；It infuses experimental group multistage and targets Compound-acid, kept the temperature in 50 DEG C of insulating boxs
5.0 hour；It is saturated water flooding again, surveys water phase permeability (K2).Note multistage targeting Compound-acid reaction front and back permeability is calculated to increase
Add rate；Parallel laboratory test three times, calculates mean permeability increment rate.Test result is shown in Table 4.
4 true sandstone core corrosion test result of table
As seen from Table 4, the mean permeability of multistage targeting Compound-acid increases multiple higher than mud acid (+3% hydrogen of 12% hydrochloric acid
Fluoric acid), the mean permeability of especially second block rock core increases multiple and is much higher than mud acid, i.e., remote to second piece of rock core acidizing effect
Better than mud acid (+3% hydrofluoric acid of 12% hydrochloric acid), illustrate that multistage targeting Compound-acid acidification radius is big, long action time, acidification
Effect is more preferable.
(2) control group is mud acid, including 15% hydrochloric acid, 5% hydrofluoric acid, surplus are water.Experimental group is the more of embodiment 1
Grade targeting Compound-acid.Test method is the same as test (one).Test result is shown in Table 5.
5 true sandstone core corrosion test result of table
As seen from Table 5, multistage targeting Compound-acid is much higher than mud acid to the mean permeability increase multiple of second block of rock core,
Mud acid (+5% hydrofluoric acid of 12% hydrochloric acid) is much better than to second piece of rock core acidizing effect, illustrates that multistage targeting Compound-acid acidification is made
With radius is big, long action time, acidizing effect are more preferable.
(3) control group is mud acid, including 12% hydrochloric acid, 3% hydrofluoric acid, surplus are water.Experimental group is the more of embodiment 4
Grade targeting Compound-acid.Test method is the same as test (one).Test result is shown in Table 6.
6 true sandstone core corrosion test result of table
As seen from Table 6, multistage targeting Compound-acid increases multiple much higher than mud acid to the mean permeability of second block of rock core
(+5% hydrofluoric acid of 12% hydrochloric acid) is much better than mud acid (+5% hydrofluoric acid of 12% hydrochloric acid) to second piece of rock core acidizing effect, says
It is more preferable that bright multistage targets big Compound-acid acidification radius, long action time, acidizing effect.
(4) control group is mud acid, including 15% hydrochloric acid, 5% hydrofluoric acid, surplus are water.Experimental group is the more of embodiment 4
Grade targeting Compound-acid.Test method is the same as test (one).Test result is shown in Table 7.
7 true sandstone core corrosion test result of table
As seen from Table 7, multistage targeting Compound-acid increases multiple much higher than mud acid to the mean permeability of second block of rock core
(+5% hydrofluoric acid of 15% hydrochloric acid) is much better than mud acid (+5% hydrofluoric acid of 15% hydrochloric acid) to second piece of rock core acidizing effect, says
It is more preferable that bright multistage targets big Compound-acid acidification radius, long action time, acidizing effect.
Compbined test (one) to (four), when mud acid de-plugging, if increasing hydrochloric acid and hydrofluoric acid in mud acid uses concentration, although the
One piece of rock core acidizing effect accordingly enhances, but second piece of rock core acidizing effect is then deteriorated, and illustrates to have formd in first block of rock core
More serious secondary precipitation injury influences displacement effect of the subsequent acid solution to second block of rock core.And multistage targeting Compound-acid is secondary
Depositing damage is weaker, and it is still relatively strong to second piece of rock core acidizing effect to show as it.Above-mentioned test result absolutely proves: compared to
Mud acid, multistage targeting Compound-acid acidification radius is big, long action time, secondary precipitation injury is small, deep acidification effect is good, fits
Close the plugging removal and stimulation augmented injection operation of ultra-low penetration oil field oil water well acidizing.
Although the term of relativity, such as "upper" "lower" is used to describe a component of icon for another in this specification
The relativeness of one component, but these terms are in this manual merely for convenient, for example, with reference to the accompanying drawings described in show
The direction of example.It is appreciated that, if making it turn upside down the device overturning of icon, the component described in "upper" will
As the component in "lower".When certain structure is at other structures "upper", it is possible to refer to that certain structural integrity is formed in other structures
On, or refer to that certain structure is " direct " and be arranged in other structures, or refer to that certain structure is arranged by the way that another structure is " indirect " in other knots
On structure.
Term "one", " one ", "the", " described " and "at least one" be to indicate that there are one or more elements/groups
At part/etc.；Term " comprising " and " having " is to indicate the open meaning being included and refer in addition to listing
Element/component part/also may be present except waiting other element/component part/etc..
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by appended
Claim is pointed out.
Claims (10)
1. a kind of multistage targeting Compound-acid, which is characterized in that according to mass percent, including following components:
Inorganic acid 14%~22%, organic acid 10%~15%, surfactant 1%~3%, stabilizer 1%~3%, acidification
Corrosion inhibiter 1%~3%, surplus are water.
2. multistage targeting Compound-acid according to claim 1, which is characterized in that the inorganic acid include hydrochloric acid, hydrofluoric acid,
One of phosphoric acid, nitrous acid, fluoboric acid are a variety of.
3. multistage targeting Compound-acid according to claim 2, which is characterized in that the inorganic acid includes hydrochloric acid, hydrofluoric acid
And phosphoric acid, each component account for 10%, 2%~3% and the 5% of the multistage targeting Compound-acid gross mass respectively.
4. multistage targeting Compound-acid according to claim 3, which is characterized in that the inorganic acid further includes fluoboric acid, institute
State fluoboric acid accounts for the multistage targeting Compound-acid gross mass 4%.
5. multistage targeting Compound-acid according to claim 1, which is characterized in that the organic acid includes phosphonic acids, amino sulphur
One of acid, acetic acid, monoxone are a variety of.
6. multistage targeting Compound-acid according to claim 4, which is characterized in that the organic acid includes phosphonic acids, amino sulphur
Acid, acetic acid, any two kinds in monoxone, the gross mass of any two kinds of components account for the multistage targeting Compound-acid gross mass
10%.
7. multistage targeting Compound-acid according to claim 1, which is characterized in that the surfactant include fluorine carbon,
One of betaines, polyethers, sulfonated species are a variety of.
8. multistage targeting Compound-acid according to claim 1, which is characterized in that the stabilizer includes ethylenediamine tetrem
One of acid, disodium edta, citric acid, oxalic acid are a variety of.
9. multistage targeting Compound-acid according to claim 1, which is characterized in that the acidification corrosion inhibitor includes poly- asparagus fern ammonia
At least one of acid, propilolic alcohol.
10. a kind of preparation method of multistage targeting Compound-acid characterized by comprising
According to mass percent, following each component: inorganic acid 14.0%~22.0% is weighed respectively, organic acid 10.0%~
15.0%, surfactant 1.0%~3.0%, stabilizer 1.0%~3.0%, acidification corrosion inhibitor 1.0%~3.0%, surplus
For water；
The inorganic acid, organic acid, stabilizer, acidification corrosion inhibitor are added in the water, after mixing, added described
Surfactant is uniformly mixed again, obtains the multistage targeting Compound-acid.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111808592A (en) * | 2020-08-06 | 2020-10-23 | 核工业北京化工冶金研究院 | Chemical well flushing agent and well flushing method for in-situ leaching uranium mining |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102433111A (en) * | 2010-09-29 | 2012-05-02 | 中国石油化工股份有限公司 | Acid liquid for acid fracturing and preparation method thereof |
| CN102775980A (en) * | 2012-07-17 | 2012-11-14 | 大庆井升伟业油田技术服务有限公司 | Acidizing block remover suitable for complex lithologic reservoir |
| CN104371684A (en) * | 2014-10-27 | 2015-02-25 | 西安石油大学 | Polyhydroxyl hydrolyzed micelle acidolysis blockage removal agent and blockage removal technology |
| CN106811186A (en) * | 2017-01-12 | 2017-06-09 | 大庆市杰森钻采助剂厂 | A kind of acidification blocking remover |
| CN107892908A (en) * | 2017-11-23 | 2018-04-10 | 克拉玛依新科澳石油天然气技术股份有限公司 | Water injection well unblocking and injection increasing agent and preparation method thereof |
-
2019
- 2019-05-17 CN CN201910410471.2A patent/CN110055043A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102433111A (en) * | 2010-09-29 | 2012-05-02 | 中国石油化工股份有限公司 | Acid liquid for acid fracturing and preparation method thereof |
| CN102775980A (en) * | 2012-07-17 | 2012-11-14 | 大庆井升伟业油田技术服务有限公司 | Acidizing block remover suitable for complex lithologic reservoir |
| CN104371684A (en) * | 2014-10-27 | 2015-02-25 | 西安石油大学 | Polyhydroxyl hydrolyzed micelle acidolysis blockage removal agent and blockage removal technology |
| CN106811186A (en) * | 2017-01-12 | 2017-06-09 | 大庆市杰森钻采助剂厂 | A kind of acidification blocking remover |
| CN107892908A (en) * | 2017-11-23 | 2018-04-10 | 克拉玛依新科澳石油天然气技术股份有限公司 | Water injection well unblocking and injection increasing agent and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 王贯中: "低渗透酸敏性地层酸化技术研究", 《石油与天然气学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111808592A (en) * | 2020-08-06 | 2020-10-23 | 核工业北京化工冶金研究院 | Chemical well flushing agent and well flushing method for in-situ leaching uranium mining |
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