CN110358514A - A kind of accumulation type water solubility diverting agent and preparation method thereof - Google Patents
A kind of accumulation type water solubility diverting agent and preparation method thereof Download PDFInfo
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- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
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Abstract
The present invention provides a kind of accumulation type water solubility diverting agent and preparation method thereof, the raw material composition of accumulation type water solubility diverting agent includes: the paratoluenesulfonic acid sodium salt of 10.0%-15.0% in mass ratio, the cocamidopropyl propyl amide hydroxy sulfo lycine of 5.0%-10.0%, the myristyl ammonium benzene sulfonate of 12.0%-15.0%, the methyl sodiosul foaliphatate of 10.0%-15.0%, the N- ethoxy ethamine triacetic acid ammonium of 10.0%-15.0%, the butyl glycol ether of 10.0%-15.0%, surplus is water.Accumulation type water solubility diverting agent of the invention, which mixes the chemical particle generated with acid solution and can be evenly distributed in water, to be assembled, at the temporary stifled particle that partial size is controllable；The sealing ratiod of generation can reach 90% or more；The accumulation type grain diameter of generation is uniformly and partial size type is more, meets the requirement of inhomogeneous formation distributary acid.After temporary plugging function is realized, in later period the injecting process, diverting agent can gradually dissolve, and dredge duct again, not influence later period water filling.
Description
Technical field
The present invention relates to a kind of oil field water-soluble diverting agents and preparation method thereof, and in particular to a kind of accumulation type is water-soluble
Diverting agent and preparation method thereof can be used for filling the water well profile adjustment field.
Background technique
One key factor of matrix acidifying job success is exactly the appropriate storing of acid solution, it is therefore an objective to allow all payzones all
It can be touched with sufficient acid solution.If reservoir heterogeneity is stronger, acid solution will preferentially be flowed into high permeability zone, and hyposmosis
Layer is not processed then.Therefore, it is necessary to carry out turning to shunting processing, to guarantee that entire stratum has carried out acidification.It turns to
The effect of shunting is to balance acid solution flowing, so that the stratum of different permeabilities can reach acidification.
Current main steering shunting process technology mainly has: mechanical delamination technology, chemical particle dividing technology, foam point
Flow Technique, Thickened Acid dividing technology etc..Down-hole mechanical hierarchically dividing tool can relatively accurately realize the shunting of acid solution, but its
Complex process, period are long, require the condition of complete well, well cementation very strict；It is gradually improved using the technique that thickening acid solution shunts,
The gelling of high polymer crosslinking turns to acid and Surfactant Used in Viscoelastic Fracturing Fluids self-diverting acid is fast-developing, but all exist to some extent at
The problems such as this is higher, construction is complicated and is not easy the row of returning.Foam dividing technology is current more novel developing direction, but it is existing
Field application needs special equipment, and operating process is complicated.Therefore field application it is more be chemical particle dividing technology.But chemistry is micro-
Grain shunting is that a kind of chemical particle that oil is molten and non-aqueous is added in acid solution (to oil well).Therefore need to develop a kind of water filling
The water-soluble and non-oil molten chemical particle of well, cooperation acidification are used together, and complete to reach adjustment to the distributary acid of water injection well
The purpose of section.
Summary of the invention
In order to overcome the problems, such as that existing acidification is uneven and closure can be poor, the present invention provides a kind of accumulation type water solubility diverting agent
And preparation method thereof, the mechanism of action is that acidization is exactly by diverting agent and the mixed liquor of acid solution injection stratum, and diverting agent exists
Chemical particle is formed in acidic environment, will preferentially enter the lesser high permeability formation of flow resistance, forms shielding bridge blinding.Plugged zone control
Into the acid solution flow of high permeability formation, it is acidified low-permeability layer effectively.Diverting agent particle is hypertonic with water filling thoroughly dissolution after acidification
Layer permeability is restored, to solve the problems, such as that water filling well acidizing is uneven, to the shut-off capacity of high permeability formation reach 90% with
On.
The technical solution adopted by the present invention are as follows:
The raw material composition of a kind of accumulation type water solubility diverting agent, accumulation type water solubility diverting agent includes: 10.0%- in mass ratio
15.0% paratoluenesulfonic acid sodium salt, the cocamidopropyl propyl amide hydroxy sulfo lycine of 5.0%-10.0%, the tetradecane of 12.0%-15.0%
Base ammonium benzene sulfonate, the methyl sodiosul foaliphatate of 10.0%-15.0%, the N- ethoxy ethamine triacetic acid ammonium of 10.0%-15.0%,
The butyl glycol ether of 10.0%-15.0%, surplus are water.
The raw material composition of the accumulation type water solubility diverting agent includes: 12.0% paratoluenesulfonic acid sodium salt in mass ratio,
8.0% cocamidopropyl propyl amide hydroxy sulfo lycine, 13.0% myristyl ammonium benzene sulfonate, 13.0% fatty acid methyl ester sulfonic acid
Sodium, 13.0% N- ethoxy ethamine triacetic acid ammonium, 13.0% butyl glycol ether, surplus is water.
A kind of preparation method of accumulation type water solubility diverting agent, it is characterised in that: specific steps are as follows:
Sequentially add toluenesulfonic acid sodium salt, myristyl ammonium benzene sulfonate, methyl sodiosul foaliphatate, N- hydroxyl in proportion in a kettle
Ethyl ethamine triacetic acid ammonium, cocamidopropyl propyl amide hydroxy sulfo lycine and water, stirring at least after twenty minutes, are added 58-62 DEG C instead
It answers and reacts at least half an hour in kettle, be finally proportionally added into butyl glycol ether and continue stirring 10-15 minutes, be down to room temperature and obtain institute
State accumulation type water solubility diverting agent.
Described sequentially adds toluenesulfonic acid sodium salt, myristyl ammonium benzene sulfonate, fatty acid methyl ester in proportion in a kettle
Sodium sulfonate, N- ethoxy ethamine triacetic acid ammonium, cocamidopropyl propyl amide hydroxy sulfo lycine and water, stirring at least after twenty minutes, add
Enter in 60 DEG C of reaction kettles and reacts at least half an hour.
The room temperature is 20 DEG C.
The paratoluenesulfonic acid sodium salt, the fine particle for being slightly soluble in acid can be formed by meeting salinity water, and the partial size of formation is in 3-
Between 10 microns, after the completion of acidification, the chemical particle of formation can be gradually dissolved in water.
The myristyl ammonium benzene sulfonate, the fine particle for being slightly soluble in acid, the partial size of formation can be formed by meeting salinity water
Between 10-30 microns, after the completion of acidification, the chemical particle of formation can be gradually dissolved in water.
The accumulation type water solubility diverting agent is work-in-progress control additive, after meeting acid, forms particle, it is high to play closure
Infiltration layer makes acid solution shunt the effect turned to.
The invention has the benefit that
After accumulation type water solubility diverting agent of the invention and acid solution mixing, the particle of formation reaches 90% to the sealing ratiod of high permeability formation
More than.The chemical particle that accumulation type water solubility diverting agent of the invention mixes generation with acid solution, which can be evenly distributed in water, to carry out
Aggregation, at the temporary stifled particle that partial size is controllable；The sealing ratiod of generation can reach 90% or more；The accumulation type grain diameter of generation
Uniformly and partial size type is more, meets the requirement of inhomogeneous formation distributary acid.After temporary plugging function is realized, in later period the injecting process
In, diverting agent can gradually dissolve, and dredge duct again, not influence later period water filling.
Specific embodiment
Embodiment 1
In order to which overcome the problems, such as that existing acidification is uneven and block can be poor, the present invention provide a kind of accumulation type water solubility diverting agent and its
Preparation method, the mechanism of action are that acidization is exactly by diverting agent and the mixed liquor of acid solution injection stratum, and diverting agent is in acidity
Chemical particle is formed in environment, will preferentially enter the lesser high permeability formation of flow resistance, forms shielding bridge blinding.Plugged zone control enters
The acid solution flow of high permeability formation, is acidified low-permeability layer effectively.Diverting agent particle is seeped with water filling thoroughly dissolution, high permeability formation after acidification
Saturating rate is restored, to solve the problems, such as that water filling well acidizing is uneven, reaches 90% or more to the shut-off capacity of high permeability formation.
The raw material composition of a kind of accumulation type water solubility diverting agent, accumulation type water solubility diverting agent includes: 10.0% in mass ratio
Paratoluenesulfonic acid sodium salt, 5.0% cocamidopropyl propyl amide hydroxy sulfo lycine, 12.0% myristyl ammonium benzene sulfonate, 10.0%
Methyl sodiosul foaliphatate, 10.0% N- ethoxy ethamine triacetic acid ammonium, 10.0% butyl glycol ether, surplus is water.
In the present embodiment, prepare the specific steps of this accumulation type water solubility diverting agent are as follows: in a kettle in proportion according to
Secondary addition toluenesulfonic acid sodium salt, myristyl ammonium benzene sulfonate, methyl sodiosul foaliphatate, N- ethoxy ethamine triacetic acid ammonium, cocounut oil
Amido propyl hydroxy sulfo lycine and water, stirring at least after twenty minutes, are added in 58-62 DEG C of reaction kettle and react at least half an hour,
It is finally proportionally added into butyl glycol ether and continues stirring 10-15 minutes, be down to room temperature and obtain the accumulation type water solubility diverting agent.
In the present invention, paratoluenesulfonic acid sodium salt, the fine particle for being slightly soluble in acid can be formed by meeting salinity water, and the partial size of formation exists
Between 3-10 microns, after the completion of acidification, the chemical particle of formation can be gradually dissolved in water.Cocamidopropyl propyl amide hydroxyl sulfobetaines
Alkali forms viscoelastic surfactant in acid solution, the chemical particle for the different-grain diameter which forms can be captured in one
It rises and forms biggish particle, and the particle of formation can be uniformly dispersed in liquid.Myristyl ammonium benzene sulfonate meets mine
Change degree water can form the fine particle for being slightly soluble in acid, and the partial size of formation is between 10-30 microns, after the completion of acidification, the change of formation
Learning particle can gradually be dissolved in water.N- ethoxy ethamine triacetic acid ammonium, meets acid and can be formed and be slightly soluble in the soluble easily in water tiny of acid
Particle, after the completion of acidification, the chemical particle of formation can be gradually dissolved in water, and can be pressed down in water with chelates ferric ions, barium ions etc.
The generation for making precipitating, extends the validity period of acidification.Butyl cellosolve, main rise eliminate the formation blocking of stratum organic deposition.This is poly-
Integrate type water solubility diverting agent as work-in-progress control additive, after meeting acid, forms particle, play closure high permeability formation, shunt acid solution
The effect of steering.After the accumulation type water solubility diverting agent and acid solution mixing, the particle of formation reaches 90% to the sealing ratiod of high permeability formation
More than.
Acidization of the invention is exactly by diverting agent and the mixed liquor of acid solution injection stratum, and diverting agent is in acidic environment
Chemical particle is formed, the lesser high permeability formation of flow resistance will be preferentially entered, forms shielding bridge blinding.Plugged zone control enters high permeability formation
Acid solution flow, be acidified low-permeability layer effectively.With water filling, thoroughly dissolution, high permeability permeability obtain diverting agent particle after acidification
To recovery, to solve the problems, such as that water filling well acidizing is uneven, 90% or more is reached to the shut-off capacity of high permeability formation.
Embodiment 2:
A kind of accumulation type water solubility diverting agent, the raw material composition of accumulation type water solubility diverting agent include: 12.0% pair in mass ratio
Toluenesulfonic acid sodium salt, 8.0% cocamidopropyl propyl amide hydroxy sulfo lycine, 13.0% myristyl ammonium benzene sulfonate, 13.0% fat
Sour methyl ester sulfonate, 13.0% N- ethoxy ethamine triacetic acid ammonium, 13.0% butyl glycol ether, surplus is water.
In the present embodiment, prepare the specific steps of this accumulation type water solubility diverting agent are as follows: in a kettle in proportion according to
Secondary addition toluenesulfonic acid sodium salt, myristyl ammonium benzene sulfonate, methyl sodiosul foaliphatate, N- ethoxy ethamine triacetic acid ammonium, cocounut oil
Amido propyl hydroxy sulfo lycine and water, stirring at least after twenty minutes, are added in 58-62 DEG C of reaction kettle and react at least half an hour,
It is finally proportionally added into butyl glycol ether and continues stirring 10-15 minutes, be down to room temperature and obtain the accumulation type water solubility diverting agent.
In the present invention, paratoluenesulfonic acid sodium salt, the fine particle for being slightly soluble in acid can be formed by meeting salinity water, and the partial size of formation exists
Between 3-10 microns, after the completion of acidification, the chemical particle of formation can be gradually dissolved in water.
Cocamidopropyl propyl amide hydroxy sulfo lycine, forms viscoelastic surfactant in acid solution, can be by the medicament shape
At the chemical particle of different-grain diameter be captured in and be formed together biggish particle, and the particle of formation can uniformly be dispersed
In a liquid.
Myristyl ammonium benzene sulfonate, the fine particle for being slightly soluble in acid can be formed by meeting salinity water, and the partial size of formation is in 10-30
Between micron, after the completion of acidification, the chemical particle of formation can be gradually dissolved in water.N- ethoxy ethamine triacetic acid ammonium, meeting acid can
The fine particle soluble easily in water for being slightly soluble in acid is formed, after the completion of acidification, the chemical particle of formation can be gradually dissolved in water, in water
In can with chelates ferric ions, barium ions etc., inhibit precipitating generation, extend the validity period of acidification.
In the present invention, butyl cellosolve, main rise eliminates the formation blocking of stratum organic deposition.The accumulation type is water-soluble temporarily stifled
Agent is work-in-progress control additive, after meeting acid, forms particle, plays the role of closure high permeability formation, shunts acid solution and turns to.This is poly-
After collection type water solubility diverting agent and acid solution mixing, the particle of formation reaches 90% or more to the sealing ratiod of high permeability formation.
Accumulation type water solubility diverting agent of the invention mixes the chemical particle generated with acid solution and can be evenly distributed in water
Assembled, at the temporary stifled particle that partial size is controllable；The sealing ratiod of generation can reach 90% or more；The accumulation type particle of generation
Uniform particle sizes and partial size type is more, meet the requirement of inhomogeneous formation distributary acid.After temporary plugging function is realized, filled the water in the later period
In the process, diverting agent can gradually dissolve, and dredge duct again, not influence later period water filling.
Embodiment 3:
A kind of accumulation type water solubility diverting agent, the raw material composition of accumulation type water solubility diverting agent include: 15.0% pair in mass ratio
Toluenesulfonic acid sodium salt, 10.0% cocamidopropyl propyl amide hydroxy sulfo lycine, 15.0% myristyl ammonium benzene sulfonate, 15.0% rouge
Fatty acid methyl esters sodium sulfonate, 15.0% N- ethoxy ethamine triacetic acid ammonium, 15.0% butyl glycol ether, surplus is water.
Sequentially add toluenesulfonic acid sodium salt in proportion in a kettle, myristyl ammonium benzene sulfonate, methyl sodiosul foaliphatate,
At least after twenty minutes, 58-62 is added in N- ethoxy ethamine triacetic acid ammonium, cocamidopropyl propyl amide hydroxy sulfo lycine and water, stirring
At least half an hour is reacted in DEG C reaction kettle, butyl glycol ether is finally proportionally added into and continues stirring 10-15 minutes, be down to room temperature and obtain
To the accumulation type water solubility diverting agent.
Preferably, described to sequentially add toluenesulfonic acid sodium salt, myristyl ammonium benzene sulfonate, fat in proportion in a kettle
Sour methyl ester sulfonate, N- ethoxy ethamine triacetic acid ammonium, cocamidopropyl propyl amide hydroxy sulfo lycine and water stir at least 20 minutes
Afterwards, it is added in 60 DEG C of reaction kettles and reacts at least half an hour.
Preferably, the room temperature is 20 DEG C.
Preferably, the paratoluenesulfonic acid sodium salt, the fine particle for being slightly soluble in acid, the grain of formation can be formed by meeting salinity water
Diameter is between 3-10 microns, and after the completion of acidification, the chemical particle of formation can be gradually dissolved in water.
Preferably, the myristyl ammonium benzene sulfonate, the fine particle for being slightly soluble in acid can be formed by meeting salinity water, be formed
Partial size between 10-30 microns, after the completion of acidification, the chemical particle of formation can be gradually dissolved in water.
Preferably, the accumulation type water solubility diverting agent is work-in-progress control additive, after meeting acid, forms particle, rises
To high permeability formation is blocked, acid solution is made to shunt the effect turned to.
Accumulation type water solubility diverting agent of the invention mixes the chemical particle generated with acid solution and can be evenly distributed in water
Assembled, at the temporary stifled particle that partial size is controllable；The sealing ratiod of generation can reach 90% or more；The accumulation type particle of generation
Uniform particle sizes and partial size type is more, meet the requirement of inhomogeneous formation distributary acid.After temporary plugging function is realized, filled the water in the later period
In the process, diverting agent can gradually dissolve, and dredge duct again, not influence later period water filling.
Embodiment 4:
A kind of accumulation type water solubility diverting agent is provided in this implementation, raw material composition includes: 10.0% paratoluenesulfonic acid sodium salt,
5.0% cocamidopropyl propyl amide hydroxy sulfo lycine, 12.0% myristyl ammonium benzene sulfonate, 10.0% fatty acid methyl ester sulfonic acid
Sodium, 10.0% N- ethoxy ethamine triacetic acid ammonium, 10.0% butyl glycol ether, surplus is water.
The present embodiment additionally provides the preparation method of above-mentioned accumulation type water solubility diverting agent, specifically includes the following steps:
Toluenesulfonic acid sodium salt, myristyl ammonium benzene sulfonate, methyl sodiosul foaliphatate, N- ethoxy second are sequentially added in a kettle
Amine triacetic acid ammonium, cocamidopropyl propyl amide hydroxy sulfo lycine are blunged after twenty minutes, and it is small that reaction half in 60 DEG C of reaction kettles is added
When, butyl glycol ether is added and continues stirring 10 minutes, is down to room temperature and obtains the accumulation type water solubility diverting agent.
The performance of the above-mentioned inhibitor of the present embodiment is tested indoors.Its quality and technical index is as follows:
Appearance: being colourless transparent liquid under room temperature；
PH value: 8.0；
Specific gravity: 1.07；
It is water-soluble: to be completely dissolved
Ultimately form particle size range: 50-100um
To reservoir sealing ratiod: 92%
Field test situation:
In April, 2017, accumulation type water solubility diverting agent carry out field test in the oil field HJ for the first time.Test well H42-36 is to cut open flatly
Face water suction is uneven and the water injection well shorted, and when carrying out water absorption test early period, perforated interval upper layer does not absorb water, and (water absorption is
0), lower layer's needle pattern water suction (100%) has carried out the well for this temporarily to block up distributary acid processing.
2000 meters of the well well depth, complete 15 meters of well perforated interval thickness, 6 meters of upper layer, 9 meters of lower layer；Permeability is 3mD, porosity
When being 12%, due to underground layer needle pattern water suction, and be under-injected well, therefore designing distributary acid scheme, select main body acid solution for chela
Close sour 20 sides, 3 side of accumulation type water solubility diverting agent.Work progress are as follows: first infuse preposition 3 side of acid solution slug, to pit shaft and borehole into
Row pretreatment；Acid solution and water-soluble diverting agent are then injected simultaneously, and injection rate 1:1 makes acid solution and water-soluble diverting agent exist
It is sufficiently mixed in pit shaft, and gradually assembles, different-grain diameter particle is formed, to block to high permeability formation；Continue thereafter with injection
Remaining acid solution, is acidified less permeable layer, starts low-permeability layer.Intake profile is retested after construction, is compared.Number
According to display, after measure, water injection rate increases, and meets injection allocation requirement, while upper layer starts to absorb water, water absorption 45%, lower layer's water absorption
It reduces, is 55%, effect is obvious, plays augmented injection and improves the purpose of section.
Embodiment 5:
A kind of accumulation type water solubility diverting agent is provided in this implementation, raw material composition includes: 15.0% paratoluenesulfonic acid sodium salt,
10.0% cocamidopropyl propyl amide hydroxy sulfo lycine, 15.0% myristyl ammonium benzene sulfonate, 15.0% fatty acid methyl ester sulfonic acid
Sodium, 15.0% N- ethoxy ethamine triacetic acid ammonium, 15.0% butyl glycol ether, surplus is water.
The performance of the above-mentioned inhibitor of the present embodiment is tested indoors.Its quality and technical index is as follows:
Appearance: being colourless transparent liquid under room temperature；
PH value: 8.2；
Specific gravity: 1.08；
It is water-soluble: to be completely dissolved
Ultimately form particle size range: 30-50um
To reservoir sealing ratiod: 95%
Field test situation:
In August, 2017, accumulation type water solubility diverting agent carry out field test in the oil field JY.Test well D214-16 is a bite section
Absorb water uneven water injection well, when carrying out water absorption test early period, the weak water suction (water absorption 15%) in perforated interval upper layer, and lower layer
Finger-like absorbs water (85%), has carried out blocking up distributary acid processing to the well temporarily for this.
2500 meters of the well well depth, complete 20 meters of well perforated interval thickness, 8 meters of upper layer, 12 meters of lower layer；Permeability is 0.8mD, hole
Degree is 10%, due to underground layer finger-like water suction, therefore when design distributary acid scheme, selects main body acid solution for 22 side of chelated acid, gathers
4 side of collection type water solubility diverting agent.Work progress are as follows: first infuse preposition 4 side of acid solution slug, pit shaft and borehole are pre-processed；With
Inject acid solution and water-soluble diverting agent simultaneously afterwards, injection rate 1:1 keeps acid solution and water-soluble diverting agent sufficiently mixed in the wellbore
It closes, and gradually assembles, different-grain diameter particle is formed, to block to high permeability formation；The remaining acid solution of injection is continued thereafter with, to low
Permeable formation is acidified, and low-permeability layer is started.Intake profile is retested after construction, is compared.Data show, measure
Afterwards, water injection rate increases, and meets injection allocation requirement, while upper layer starts to absorb water, water absorption 42%, and lower layer's water absorption is reduced, and is 58%,
Effect is obvious, plays augmented injection and improves the purpose of section.
The foregoing examples are only illustrative of the present invention, does not constitute the limitation to protection scope of the present invention, all
It is within being all belonged to the scope of protection of the present invention with the same or similar design of the present invention.It is the technique of detailed description in the present invention
And additive is the prior art, will be no longer further detailed in the present invention.
Claims (8)
1. a kind of accumulation type water solubility diverting agent, it is characterised in that: the raw material composition of accumulation type water solubility diverting agent is in mass ratio
It include: the paratoluenesulfonic acid sodium salt of 10.0%-15.0%, the cocamidopropyl propyl amide hydroxy sulfo lycine of 5.0%-10.0%, 12.0%-
15.0% myristyl ammonium benzene sulfonate, the methyl sodiosul foaliphatate of 10.0%-15.0%, the N- ethoxy second of 10.0%-15.0%
Amine triacetic acid ammonium, the butyl glycol ether of 10.0%-15.0%, surplus are water.
2. a kind of accumulation type water solubility diverting agent according to claim 1, it is characterised in that: the accumulation type is water-soluble
The raw material composition of diverting agent includes: 12.0% paratoluenesulfonic acid sodium salt, 8.0% cocamidopropyl propyl amide hydroxyl sulfobetaines in mass ratio
Alkali, 13.0% myristyl ammonium benzene sulfonate, 13.0% methyl sodiosul foaliphatate, 13.0% N- ethoxy ethamine triacetic acid
Ammonium, 13.0% butyl glycol ether, surplus are water.
3. the preparation method of any one accumulation type water solubility diverting agent according to claim 1 to 2, it is characterised in that: tool
Body step are as follows:
Sequentially add toluenesulfonic acid sodium salt, myristyl ammonium benzene sulfonate, methyl sodiosul foaliphatate, N- hydroxyl in proportion in a kettle
Ethyl ethamine triacetic acid ammonium, cocamidopropyl propyl amide hydroxy sulfo lycine and water, stirring at least after twenty minutes, are added 58-62 DEG C instead
It answers and reacts at least half an hour in kettle, be finally proportionally added into butyl glycol ether and continue stirring 10-15 minutes, be down to room temperature and obtain institute
State accumulation type water solubility diverting agent.
4. a kind of preparation method of accumulation type water solubility diverting agent according to claim 3, it is characterised in that: it is described
Toluenesulfonic acid sodium salt, myristyl ammonium benzene sulfonate, methyl sodiosul foaliphatate, N- ethoxy second are sequentially added in reaction kettle in proportion
Amine triacetic acid ammonium, cocamidopropyl propyl amide hydroxy sulfo lycine and water, stirring at least after twenty minutes, are added in 60 DEG C of reaction kettles and react
At least half an hour.
5. a kind of preparation method of accumulation type water solubility diverting agent according to claim 3, it is characterised in that: the room
Temperature is 20 DEG C.
6. a kind of preparation method of accumulation type water solubility diverting agent according to claim 3, it is characterised in that: pair
Toluenesulfonic acid sodium salt, the fine particle for being slightly soluble in acid can be formed by meeting salinity water, and the partial size of formation has been acidified between 3-10 microns
The chemical particle of Cheng Hou, formation can be gradually dissolved in water.
7. a kind of preparation method of accumulation type water solubility diverting agent according to claim 3, it is characterised in that: described ten
Tetraalkyl ammonium benzene sulfonate, meet salinity water can be formed is slightly soluble in acid fine particle, the partial size of formation between 10-30 microns,
After the completion of acidification, the chemical particle of formation can be gradually dissolved in water.
8. a kind of preparation method of accumulation type water solubility diverting agent according to claim 3, it is characterised in that: described is poly-
Integrate type water solubility diverting agent as work-in-progress control additive, after meeting acid, forms particle, play closure high permeability formation, shunt acid solution
The effect of steering.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111019618A (en) * | 2019-11-18 | 2020-04-17 | 中国石油天然气股份有限公司 | Temperature-sensitive shunt temporary plugging agent and preparation method thereof |
| CN111088002A (en) * | 2019-11-22 | 2020-05-01 | 中国石油天然气股份有限公司 | Acidity-sensitive shunt temporary plugging agent and preparation method and application thereof |
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