CN110483690A - A kind of energy CO absorption2The acidification retardant and preparation method of formation separation layer and application - Google Patents
A kind of energy CO absorption2The acidification retardant and preparation method of formation separation layer and application Download PDFInfo
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- CN110483690A CN110483690A CN201910720970.1A CN201910720970A CN110483690A CN 110483690 A CN110483690 A CN 110483690A CN 201910720970 A CN201910720970 A CN 201910720970A CN 110483690 A CN110483690 A CN 110483690A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/56—Acrylamide; Methacrylamide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/58—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide containing oxygen in addition to the carbonamido oxygen, e.g. N-methylolacrylamide, N-(meth)acryloylmorpholine
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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
- C09K8/72—Eroding chemicals, e.g. acids
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- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
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Abstract
The present invention relates to oil/gas well deep acid fracturing fields, and in particular to a kind of energy CO absorption2Acidification retardant and preparation method and the application for forming separation layer, on the basis of overcoming that existing acid fluid system viscosity is big, construction friction is big and combining live quick liquid-confecting construction requirement, by polymerization reaction prepare it is a kind of can CO absorption2The acid solution retardant of separation layer is formed, the sulfonic acid ionized in acid fluid system reduces acid-rock reaction rate, while the fluorocarbon chain part in molecule can CO absorption with that can adsorb rock surface2A kind of effective separation layer is formed on surface, H+ diffusion is effectively reduced, achievees the effect that deep acidification.
Description
Technical field
The present invention relates to oil/gas well deep acid fracturing fields, and in particular to a kind of energy CO absorption2The acidification for forming separation layer is slow
Fast agent and preparation method and application.
Background technique
It is to improve one of acid fracturing yield important way by increasing the effective penetration range of acidfracturing treatment.Excellent acid solution
System should have the ability that H+ is spread to rock surface in control liquid phase to realize uniform cloth to reduce acid-rock reaction rate first
Acid, retarded acidizing achieve the purpose that deep acidification to increase acidification seepage distance.
The universal viscous acid of application, gel acid limit the convection current of acid solution and rock by the viscosity of increase acid solution at present,
Hydrogen ion transmitting is only limitted to spread, to effectively delay reaction speed, reduces the depletion rate of acid, improves acid fracturing
EFFECTIVE RANGE.But it needs to be added gel breaker in such acid fluid system work progress to degrade, is not easy the row of returning, reservoir damage
Greatly.
In addition, emulsified acid and foam acid system are also a kind of particularly important slow acid fluid system, increase both for passing through
Add system phase to delay acid-rock reaction rate.Emulsified acid is that acid and oil are made into oily packet yogurt shape under emulsifier existence condition
Liquid, oil separates acid solution and surface of stratum when stablizing, and acid solution is allow to enter reservoir deep, carries out depth to reservoir and changes
It makes, its advantage is that filter loss is small, retardative property is good, can enter earth formation deep；The disadvantage is that construction friction is higher, it is high compared with common acids,
Cause acid fracturing operation pressure high, discharge capacity is low.Foamed acid is by acid solution, gas, foaming agent, foam stabilizer, functional surfactant etc.
Composition, system is by replacing conventional acid solution with the acid solution inflated or gasified, and to reduce acid-rock reaction rate, realizes deep wear
Thoroughly, but under the high temperature conditions, the stability of foamed acid quickly reduces, to influence retarded acidizing effect.
Excellent slow acid fluid system should have the ability that H+ is spread to rock surface in control liquid phase first, to reduce acid
Rock reaction rate realizes that uniform acid distribution, retarded acidizing achieve the purpose that deep acidification to increase acidification seepage distance.Simultaneously
Excellent slow acid fluid system should also have compared with low viscosity and suitable construction friction, and to improve acid solution injection efficiency, raising is applied
Work efficiency rate.
Summary of the invention
The deficiency that the present invention overcomes existing acid fluid system viscosity is big, construction friction is big is constructed in conjunction with live quick liquid-confecting
It is required that providing a kind of energy CO absorption with compared with low viscosity and suitable construction friction2Form the energy CO absorption of separation layer2Shape
At the acidification retardant and preparation method of separation layer and application.
Technical problem solved by the invention can be realized using following technical scheme:
A kind of energy CO absorption2The acidification retardant of separation layer is formed, which is by monomer solution and initiator
Composition,
The monomer solution material ratio are as follows: acrylamide 4.0~6.0wt%, 2- acrylamide-2-methyl propane sulfonic
8.0~10.0wt%, perfluoroalkyl amido propyl 0.1~1.0wt% of dimethylallylammonium chloride, ammonium sulfate 1.0~
10.0wt%, 5~25wt% of sodium hydroxide solution that mass percent concentration is 10%, surplus is water；
The initiator is 1.0% potassium peroxydisulfate by mass percent concentration and mass percent concentration is 1.0%2,3,
5,6- tetrahydroxy -2- hexenoic acid -4- lactones form redox initiation system, dosage be respectively 2.0~6.0wt% and 1.0~
4.0wt%.
A kind of energy CO absorption2The molecular structural formula for forming the acidification retardant of separation layer is as follows:
Wherein, X, Y, Z are respectively the molal quantity of corresponding units, X, Y, Z molal quantity ratio are as follows:
X:Y:Z=(6-10): (4-6): (0.01-0.3).
A kind of energy CO absorption2Formed separation layer acidification retardant preparation method, the preparation method include with
Lower step:
Step 1: by acrylamide, 2- acrylamide-2-methyl propane sulfonic, perfluoroalkyl amido propyl dimethallyl
Ammonium chloride and ammonium sulfate are made into aqueous solution in proportion；
Step 2: aqueous solution obtained in the sodium hydroxide solution regulating step one for being 10% with mass percent concentration makes
PH value obtains monomer solution for 5.5~6.5；
Step 3: and then lead to after nitrogen deoxygenation 30min to the monomer solution in step 2 and initiator is added into polymerization reaction,
Obtain acidification retardant.
The polymerization reaction, 35~50 DEG C of polymerization temperature, polymerization time is 5~10h.
The acidification retardant apparent viscosity < 200cps, intrinsic viscosity are 1.5~3.5dL/g.
The acidification that concentration is 3.0g/100mL is added in the HCl that mass percent concentration is 15% in the acidification retardant
After retardant, carbonate rock static state erosion rate is reduced to 0.0019g/s by 0.0216g/s in 60min.
A kind of energy CO absorption in summary2The acidification retardant for forming separation layer is acidified in oil/gas well carbonate reservoir
Application in stimulation work.
The beneficial effects of the present invention are:
It is prepared for poly- (AM-APMS) of low molecular weight by polymerization reaction, while introducing fluorine-containing Long carbon chain, acid solution and rock
When stone reacts, hydrophilic radical is adsorbed on rock surface in polymerization, produces CO2It, can quilt due to the characteristic of the hydrophobic close gas of fluorocarbon chain
It captures around fluorocarbon chain, so that the liquid/gas interface of rock and acid solution forms one layer of CO2Acid solution and rock can be isolated in adsorbed film
Stone eventually reduces acid-rock reaction degree, reaches the effect of slow acidification.
The present invention is that existing acid fluid system viscosity is big, construction friction is big and live quick liquid-confecting construction is combined to want overcoming
On the basis of asking, a kind of energy CO absorption is prepared by polymerization reaction2The acid solution retardant for forming separation layer, it is electric in acid fluid system
From sulfonic acid reduce acid-rock reaction rate with rock surface can be adsorbed, while the fluorocarbon chain part in molecule can CO absorption2
A kind of effective separation layer is formed on surface, H+ diffusion is effectively reduced, achievees the effect that deep acidification.
Specific embodiment
Embodiment 1:
A kind of energy CO absorption2The acidification retardant of separation layer is formed, which is by monomer solution and initiator
Composition,
The monomer solution material ratio are as follows: acrylamide 4.0~6.0wt%, 2- acrylamide-2-methyl propane sulfonic
8.0~10.0wt%, perfluoroalkyl amido propyl 0.1~1.0wt% of dimethylallylammonium chloride, ammonium sulfate 1.0~
10.0wt%, 5~25wt% of sodium hydroxide solution that mass percent concentration is 10%, surplus is water；
The initiator is 1.0% potassium peroxydisulfate by mass percent concentration and mass percent concentration is 1.0%2,3,
5,6- tetrahydroxy -2- hexenoic acid -4- lactones form redox initiation system, dosage be respectively 2.0~6.0wt% and 1.0~
4.0wt%.
A kind of energy CO absorption2Formed separation layer acidification retardant preparation method, the preparation method include with
Lower step:
Step 1: by acrylamide, 2- acrylamide-2-methyl propane sulfonic, perfluoroalkyl amido propyl dimethallyl
Ammonium chloride and ammonium sulfate are made into aqueous solution in proportion；
Step 2: aqueous solution obtained in the sodium hydroxide solution regulating step one for being 10% with mass percent concentration makes
PH value obtains monomer solution for 5.5~6.5；
Step 3: and then lead to after nitrogen deoxygenation 30min to the monomer solution in step 2 and initiator is added into polymerization reaction,
Obtain acidification retardant.
The polymerization reaction, 35~50 DEG C of polymerization temperature, polymerization time is 5~10h.
The acidification retardant apparent viscosity < 200cps, intrinsic viscosity are 1.5~3.5dL/g.
The acidification that concentration is 3.0g/100mL is added in the HCl that mass percent concentration is 15% in the acidification retardant
After retardant, carbonate rock static state erosion rate is reduced to 0.0019g/s by 0.0216g/s in 60min.
A kind of energy CO absorption in summary2The acidification retardant for forming separation layer is acidified in oil/gas well carbonate reservoir
Application in stimulation work.
The sulfonic acid that the acidification retardant obtained by this method ionizes in acid fluid system is dropped with that can adsorb rock surface
Low acid-rock reaction rate, while the fluorocarbon chain part in molecule can CO absorption2A kind of effective separation layer is formed on surface, is had
Effect reduces H+ diffusion, achievees the effect that deep acidification.
Embodiment 2:
On the basis of embodiment 1, a kind of energy CO absorption2Form the molecular structure of the acidification retardant of separation layer
Formula is as follows:
Wherein, X, Y, Z are respectively the molal quantity of corresponding units, X, Y, Z molal quantity ratio are as follows:
X:Y:Z=(6-10): (4-6): (0.01-0.3).
The following are actual implementations to apply mode:
Embodiment 3:
In 2000mL three-necked flask be added acrylamide 5wt%, 2- acrylamide-2-methyl propane sulfonic 10.0wt%,
Perfluoroalkyl amido propyl dimethylallylammonium chloride 0.1wt%, ammonium sulfate 4.90wt% and 40.0wt% water open stirring
Completely to dissolution, the molten 20.0wt% of sodium hydroxide that mass percent concentration is 10% is added, adjusts pH=6.35, supplements water
20.0wt% obtains monomer solution；
Lead to nitrogen 30min deoxygenation to monomer solution at 25 DEG C of temperature, it is 1.0% mistake that mass percent concentration, which is then added,
Potassium sulfate solution 4.0wt%, continues logical nitrogen 5min, and addition mass percent concentration is 1.0%2,3,5,6- tetrahydroxy -2-
Aqueous solution of ester 2.0wt% in hexenoic acid -4-, temperature increases after reaction starts, and viscosity increases, after temperature is greater than 45 DEG C, water
50 DEG C of heating reaction 8h are bathed, colorless and transparent acidification retardant is obtained.
Embodiment 4:
In 2000mL three-necked flask be added acrylamide 6.0wt%, 2- acrylamide-2-methyl propane sulfonic 9.0wt%,
Perfluoroalkyl amido propyl dimethylallylammonium chloride 0.05wt%, ammonium sulfate 4.95wt% and 40.0wt% water, unlatching are stirred
It mixes to dissolution completely, addition mass percent concentration is 10% sodium hydroxide solution 16.5wt%, adjusts pH=6.15, supplements water
23.5wt% obtains monomer solution；
Lead to nitrogen 30min deoxygenation to monomer solution at 25 DEG C of temperature, then plus mass percent concentration is 1.0% over cure
Sour aqueous solutions of potassium 5.0wt% continues logical nitrogen 5min, be added mass percent concentration be 1.0%2,3,5,6- tetrahydroxy -2- oneself
Aqueous solution of ester 2.5wt% in olefin(e) acid -4-, temperature increases after reaction starts, and viscosity increases, after temperature is greater than 45 DEG C, water-bath
8h is reacted in 50 DEG C of heating, obtains colorless and transparent acidification retardant.
Embodiment 5:
Acrylamide 6.0wt%, 2- acrylamide-2-methyl propane sulfonic are added in 2000mL three-necked flask
10.0wt%, perfluoroalkyl amido propyl dimethylallylammonium chloride 0.05wt%, ammonium sulfate 9.95wt% and 40.0wt%
Water opens stirring to dissolving completely, and addition mass percent concentration is 10% sodium hydroxide solution 20.0wt%, adjusts pH=
6.35, supplement water 14.0wt% obtains monomer solution；
Lead to nitrogen 30min deoxygenation to monomer solution at 25 DEG C of temperature, it is 1.0% mistake that mass percent concentration, which is then added,
Potassium sulfate solution 4.0wt%, continues logical nitrogen 5min, and addition mass percent concentration is 1.0%2,3,5,6- tetrahydroxy -2-
Aqueous solution of ester 2.5wt% in hexenoic acid -4-, temperature increases after reaction starts, and viscosity increases, after temperature is greater than 45 DEG C, water
50 DEG C of heating reaction 8h are bathed, colorless and transparent acidification retardant is obtained.
Embodiment 6:
1) the acidification retardant for preparing embodiment 3-5 uses BROOKFIELD DV-III+Pro viscosity apparatus, selects s64
Model rotor, revolving speed 15r/min test out the viscosity number at 25 DEG C, totally three set products；
| Embodiment 3 | Embodiment 4 | Embodiment 5 | |
| Product viscosity/cps | 185 | 175 | 125 |
2) acidification retardant prepared by embodiment 3-5 is tested into its intrinsic viscosity with capillary viscometer, totally three set products；
| Embodiment 3 | Embodiment 4 | Embodiment 5 | |
| Intrinsic viscosity/dL/g | 2.05 | 2.66 | 2.95 |
3) the acidification retardant tap water for preparing embodiment 3-5 prepares 3.0wt% solution, with drop resistance analyzer test
It is with respect to the resistance-reducing yield of clear water, and contrast groups are 15wt%HCl solution, totally three groups of acid fluid systems；
| Embodiment 3 | Embodiment 4 | Embodiment 5 | |
| Resistance-reducing yield/% | 47.5 | 42.1 | 45.3 |
4) the acidification retardant 15wt%HCl for preparing embodiment 3-5 prepares 3.0wt% solution, tests its viscosity, altogether
Three groups of acid solutions；
| Embodiment 3 | Embodiment 4 | Embodiment 5 | |
| Acid liquid viscosity/cps | 1.8619 | 2.1023 | 1.9504 |
5) the acidification retardant 15wt%HCl for preparing embodiment 3-5 prepares 3.0wt% solution, and contrast groups are
15wt%HCl solution, totally four groups of acid solutions, using its CO absorption of TOC (organic carbon analyzer) instrument test2Amount；
5) In Carbonate Rock is prepared intoCore column, then with acidproof silicone adhesive by rock core bottom
With it is sealed around, core column is put into vertically in above-mentioned four kinds of acid solutions, volume 250mL, 90 DEG C of water-bath, acidification reaction 60min takes
It weighs out, calculates accumulated static acid solution erosion rate in 60min.
| Contrast groups | Embodiment 3 | Embodiment 4 | Embodiment 5 | |
| Acid liquid viscosity/mPa.s | 1.0825 | 1.8619 | 2.1023 | 1.9504 |
| Static acid solution erosion rate/g/s | 0.0216 | 0.0023 | 0.0019 | 0.0029 |
Embodiments of the present invention are described in detail above, but present invention is not limited to the embodiments described above, In
Those of ordinary skill in the art within the scope of knowledge, can also make various without departing from the purpose of the present invention
Variation, all in the protection scope of the technology.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention
In explaining relative positional relationship, motion conditions etc. between component each under a certain particular pose, if the particular pose occurs
When change, then directionality instruction also correspondingly changes correspondingly.
Technical solution between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energy
It is enough realize based on, will be understood that the knot of this technical solution when conflicting or cannot achieve when occurs in the combination of technical solution
Conjunction is not present, also not the present invention claims protection scope within.
Claims (7)
1. a kind of can CO absorption2Form the acidification retardant of separation layer, it is characterized in that: the acidification retardant be by monomer solution and
Initiator composition,
The monomer solution material ratio are as follows: acrylamide 4.0~6.0wt%, 2- acrylamide-2-methyl propane sulfonic 8.0~
10.0wt%, perfluoroalkyl amido propyl 0.1~1.0wt% of dimethylallylammonium chloride, 1.0~10.0wt% of ammonium sulfate,
5~25wt% of sodium hydroxide solution that mass percent concentration is 10%, surplus is water；
The initiator is 1.0% potassium peroxydisulfate by mass percent concentration and mass percent concentration is 1.0%2,3,5,6-
Tetrahydroxy -2- hexenoic acid -4- lactone form redox initiation system, dosage be respectively 2.0~6.0wt% and 1.0~
4.0wt%.
2. a kind of energy CO absorption according to claim 12The acidification retardant of separation layer is formed, it is characterized in that: the acidification is slow
The molecular structural formula of fast agent is as follows:
Wherein, X, Y, Z are respectively the molal quantity of corresponding units, X, Y, Z molal quantity ratio are as follows: X:Y:Z=(6-10): (4-6):
(0.01-0.3)。
3. a kind of energy CO absorption according to claim 12Form the preparation method of the acidification retardant of separation layer, feature
Be: the preparation method the following steps are included:
Step 1: by acrylamide, 2- acrylamide-2-methyl propane sulfonic, perfluoroalkyl amido propyl dimethyl-allyl chlorine
Change ammonium and ammonium sulfate is made into aqueous solution in proportion；
Step 2: aqueous solution obtained in the sodium hydroxide solution regulating step one for being 10% with mass percent concentration makes pH value
Monomer solution is obtained for 5.5~6.5；
Step 3: and then lead to after nitrogen deoxygenation 30min to the monomer solution in step 2 and initiator is added into polymerization reaction, it obtains
It is acidified retardant.
4. a kind of energy CO absorption according to claim 32Form the preparation method of the acidification retardant of separation layer, feature
Be: the polymerization reaction, 35~50 DEG C of polymerization temperature, polymerization time is 5~10h.
5. a kind of energy CO absorption according to claim 32Form the preparation method of the acidification retardant of separation layer, feature
Be: the acidification retardant apparent viscosity < 200cps, intrinsic viscosity are 1.5~3.5dL/g.
6. a kind of according to claim 3-5 any one can CO absorption2Form the preparation side of the acidification retardant of separation layer
Method, it is characterized in that: it is 3.0g/100mL's that concentration, which is added, in the HCl that mass percent concentration is 15% in the acidification retardant
After being acidified retardant, carbonate rock static state erosion rate is reduced to 0.0019g/s by 0.0216g/s in 60min.
7. a kind of described in -6 any one according to claim 1 can CO absorption2The acidification retardant of separation layer is formed in oil/gas well
Application in carbonate reservoir acid stimulation operation.
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| CN111004618A (en) * | 2019-12-27 | 2020-04-14 | 西南石油大学 | Acidification diversion agent and preparation method thereof |
| CN115805004A (en) * | 2022-11-15 | 2023-03-17 | 大唐环境产业集团股份有限公司 | Application of 4-amino-1-piperidinepropanol as carbon dioxide absorbent |
| CN117986458A (en) * | 2024-04-02 | 2024-05-07 | 成都劳恩普斯科技有限公司 | High-temperature-resistant deep penetration molecular diaphragm acid copolymer and preparation method thereof |
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| CN117986458A (en) * | 2024-04-02 | 2024-05-07 | 成都劳恩普斯科技有限公司 | High-temperature-resistant deep penetration molecular diaphragm acid copolymer and preparation method thereof |
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