CN105694831A - High-temperature-resistant and salt-resistant viscosity reducer and preparation method and application thereof - Google Patents
High-temperature-resistant and salt-resistant viscosity reducer and preparation method and application thereof Download PDFInfo
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- CN105694831A CN105694831A CN201610152931.2A CN201610152931A CN105694831A CN 105694831 A CN105694831 A CN 105694831A CN 201610152931 A CN201610152931 A CN 201610152931A CN 105694831 A CN105694831 A CN 105694831A
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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
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/22—Synthetic organic compounds
- C09K8/24—Polymers
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Abstract
The invention discloses a high-temperature-resistant and salt-resistant viscosity reducer and a preparation method and application thereof. The high-temperature-resistant and salt-resistant viscosity reducer is formed by compounding a copolymer obtained after 15-20 parts by weight of fumaric acid, 10-15 parts by weight of 2-acrylamido-2-methyl propane sulfonic acid and 10-15 parts by weight of sodium p-styrene sulfonate are copolymerized under the effect of an initiator, and 10-15 parts of ethylenediaminetetraacetic acid. The method has the advantages that the process is simple, and industrial production is easy, and the obtained viscosity reducer is resistant to high temperature of 200 DEG C and resistant to salt till saturation is achieved.
Description
Technical field
The present invention relates to petroleum gas field, more particularly to a kind of loss additive for drilling thinner。
Background technology
Thinner is the indispensable additive for drilling fluid of well drilling operation site, and adjustment drilling fluid rheology, raising bit speed are played very important effect by it。Drilling fluid in use, usually due to temperature raise, salt contamination or calcium is invaded, solid concentration increases or the reason such as inorganic agent inefficacy, make the network structure that drilling fluid is formed strengthen, the increase of drilling fluid viscosity, shear force。If viscosity, shear force are excessive, then can cause turn on pump difficulty。The phenomenon such as drilling cuttings is difficult to remove or in drilling process pressure is excessive, can cause various down hole problem time serious。Although solid control equipment can effectively remove the various solid phases in drilling fluid, but solid control equipment use at the scene at present is unsatisfactory, therefore, in drilling fluid operation and maintenance process, it is frequently necessary to add thinner, to reduce viscosity and the shear force of system so that it is have suitable rheological characteristic。And along with the development of petroleum industry and the continuous of oil demand increase, oil-gas exploration and development is gradually to deep formation and marine development, temperature resistance and saline-alkaline tolerance to thinner are had higher requirement, the product looked for novelty can bear the high temperature of more than 200 DEG C, simultaneously can anti-saturation salt, to meet the exploration needs of deep & ultra-deep well, but the temperature resistance of current most of thinner and salt-resistance can not meet requirement。
Summary of the invention
It is an object of the invention to provide a kind of novel high-temperature resisting and salt-resisting thinner material and preparation method thereof, the problem poor to solve existing water-base drilling fluid thinner heat and salinity tolerance ability。
The present invention is achieved through the following technical solutions:
A kind of high-temperature resisting and salt-resisting thinner, is formed by 15-20 part fumaric acid, 10-15 part 2-acrylamide-2-methyl propane sulfonic, 10-15 part Sodium styrene sulfonate copolymer that copolymerization is formed under the effect of initiator are composite with the ethylenediaminetetraacetic acid of 10-15 part。
Described initiator is selected from following any one or two or more mixture: Ammonium persulfate., potassium peroxydisulfate, azo diisobutyl amidine dihydrochloride。The preparation method of this high-temperature resisting and salt-resisting thinner, comprises the steps:
(1) described fumaric acid is added in deionized water, 70～75 DEG C of stirring and dissolving, obtain homogeneous phase solution；
(2) in described homogeneous phase solution, add 2-acrylamide-2-methyl propane sulfonic and Sodium styrene sulfonate, after being completely dissolved, under nitrogen protection, be slowly added to initiator, 70～85 DEG C reacting by heating 4-6 hour, obtain glue；
(3) in described glue, add ethylenediaminetetraacetic acid, 70-85 DEG C of heated and stirred 1h, obtain glue solution of sticky shape；
(4) in described glue solution of sticky shape, add appropriate sodium hydroxide, regulate pH value of water solution to 9-11, then carry out spray drying, obtain described high-temperature resisting and salt-resisting thinner。
In above-mentioned preparation method, the deionized water of addition and the weight portion of initiator are as follows:
Deionized water: 100,
Initiator: 0.1-5。
Described initiator is selected from following any one or two or more mixture: Ammonium persulfate., potassium peroxydisulfate, azo diisobutyl amidine dihydrochloride。
The operation principle of high-temperature resisting and salt-resisting thinner provided by the invention and providing the benefit that: the copolymer molecule chain being made up of fumaric acid, 2-acrylamide-2-methyl propane sulfonic and Sodium styrene sulfonate can be adsorbed in the place that clay edge aquation is weak, its hydrophilic group increases the hydrated sheath in these places, weaken or break the network structure that clay particle is constituted, release Free water, reduce the flowage friction resistance between clay particle, make shear force and the decrease in viscosity of drilling fluid；Also adsorbable in drilling cuttings surface, it is suppressed that drilling cuttings hydration swelling and dispersion, reduce solid particle number, reduce drilling fluid viscosity, improve mobility。The sulfonation group contained in 2-acrylamide-2-methyl propane sulfonic and Sodium styrene sulfonate molecular structure, and the phenyl ring contained in Sodium styrene sulfonate molecular structure, all can improve temperature resistance and the saline-alkaline tolerance of copolymer。Meanwhile, the addition of ethylenediaminetetraacetic acid, it is possible to shelter the harmful metal ion in drilling fluid, improves the viscosity reduction efficiency of high-temperature resisting and salt-resisting thinner。The method has the advantages that technique is simple, be prone to industrialized production, and gained thinner resists 200 DEG C of high temperature, and anti-salt is to saturated。
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further elaborated, but the present invention is not limited to following example。Described method is conventional method if no special instructions。In following each embodiment, described part is parts by weight。Described reactant all can obtain from open commercial sources if no special instructions。
Embodiment 1
1) in equipped with the four-hole bottle of mechanical agitator, add 15 parts of fumaric acid, 100 parts of deionized waters, 70 DEG C of stirring and dissolving, obtain homogeneous phase solution；
2) in described homogeneous phase solution, add 10 parts of 2-acrylamide-2-methyl propane sulfonics and 10 parts of Sodium styrene sulfonate, after being completely dissolved, under nitrogen protection, be slowly added to 0.1 part of Ammonium persulfate., 70 DEG C of reacting by heating 4 hours, obtain glue；
3) in described glue, add 10 parts of ethylenediaminetetraacetic acid, 75 DEG C of heated and stirred 1h, obtain glue solution of sticky shape；
4) adding appropriate sodium hydroxide in described glue solution of sticky shape, regulate pH value of water solution to 9, then carry out spray drying, obtain described high-temperature resisting and salt-resisting thinner, specific performance is listed in table 1。
Embodiment 2
1) in equipped with the four-hole bottle of mechanical agitator, add 18 parts of fumaric acid, 100 parts of deionized waters, 75 DEG C of stirring and dissolving, obtain homogeneous phase solution；
2) in described homogeneous phase solution, add 15 parts of 2-acrylamide-2-methyl propane sulfonics and 10 parts of Sodium styrene sulfonate, after being completely dissolved, under nitrogen protection, be slowly added to 1 part of Ammonium persulfate., 75 DEG C of reacting by heating 4 hours, obtain glue；
3) in described glue, add 12 parts of ethylenediaminetetraacetic acid, 85 DEG C of heated and stirred 1h, obtain glue solution of sticky shape；
4) adding appropriate sodium hydroxide in described glue solution of sticky shape, regulate pH value of water solution to 10, then carry out spray drying, obtain described high-temperature resisting and salt-resisting thinner, specific performance is listed in table 1。
Embodiment 3
1) in equipped with the four-hole bottle of mechanical agitator, add 15 parts of fumaric acid, 100 parts of deionized waters, 70 DEG C of stirring and dissolving, obtain homogeneous phase solution；
2) in described homogeneous phase solution, add 10 parts of 2-acrylamide-2-methyl propane sulfonics and 15 parts of Sodium styrene sulfonate, after being completely dissolved, under nitrogen protection, be slowly added to 1 part of Ammonium persulfate., 80 DEG C of reacting by heating 5 hours, obtain glue；
3) in described glue, add 12 parts of ethylenediaminetetraacetic acid, 85 DEG C of heated and stirred 1h, obtain glue solution of sticky shape；
4) adding appropriate sodium hydroxide in described glue solution of sticky shape, regulate pH value of water solution to 11, then carry out spray drying, obtain described high-temperature resisting and salt-resisting thinner, specific performance is listed in table 1。
Embodiment 4
1) in equipped with the four-hole bottle of mechanical agitator, add 20 parts of fumaric acid, 100 parts of deionized waters, 75 DEG C of stirring and dissolving, obtain homogeneous phase solution；
2) in described homogeneous phase solution, add 10 parts of 2-acrylamide-2-methyl propane sulfonics and 15 parts of Sodium styrene sulfonate, after being completely dissolved, under nitrogen protection, be slowly added to 3 parts of Ammonium persulfate .s, 70 DEG C of reacting by heating 6 hours, obtain glue；
3) in described glue, add 15 parts of ethylenediaminetetraacetic acid, 70-85 DEG C of heated and stirred 1h, obtain glue solution of sticky shape；
4) adding appropriate sodium hydroxide in described glue solution of sticky shape, regulate pH value of water solution to 11, then carry out spray drying, obtain described high-temperature resisting and salt-resisting thinner, specific performance is listed in table 1。
Embodiment 5
1) in equipped with the four-hole bottle of mechanical agitator, add 10 parts of fumaric acid, 100 parts of deionized waters, 70 DEG C of stirring and dissolving, obtain homogeneous phase solution；
2) in described homogeneous phase solution, add 10 parts of 2-acrylamide-2-methyl propane sulfonics and 10 parts of Sodium styrene sulfonate, after being completely dissolved, under nitrogen protection, be slowly added to 5 parts of Ammonium persulfate .s, 70～85 DEG C of reacting by heating 6 hours, obtain glue；
3) in described glue, add 15 parts of ethylenediaminetetraacetic acid, 85 DEG C of heated and stirred 1h, obtain glue solution of sticky shape；
4) adding appropriate sodium hydroxide in described glue solution of sticky shape, regulate pH value of water solution to 9, then carry out spray drying, obtain described high-temperature resisting and salt-resisting thinner, specific performance is listed in table 1。
Described high-temperature resisting and salt-resisting thinner is carried out performance evaluation in the water base slurry of saturated salt, to investigate its temperature resistance and anti-salt property。
1) being placed in specimen cup by 350ml saturated brine, add 1.23g natrium carbonicum calcinatum, 35.00g drilling fluid test bentonite with slurry, 63.00g evaluates soil, 350g barite, high-speed stirred 20min, period interrupts 2 times, to scrape the material sticked on container wall of cup。25 ± 1 DEG C of curing in airtight condition 24h, obtain the water base slurry of saturated salt；High-speed stirred 10min, measures its aging front performance (see table 1) by the regulation of GB/T16783.1；Then pour base slurry into 200 DEG C of aging 16h in ageing can, high-speed stirred 10min after taking-up, measure its aged properties (see table 1)。
2) in the specimen cup fill base slurry, add the high-temperature resisting and salt-resisting thinner of 0.5%, high-speed stirred 20min, its aging front performance is measured by the regulation of GB/T16783.1, then drilling fluid is poured into 200 DEG C of aging 16h in ageing can, high-speed stirred 10min after taking-up, measures its aged properties (see table 1)。
The performance evaluation of table 1. high-temperature resisting and salt-resisting thinner
Note: the apparent viscosity of viscosity break ratio=(apparent viscosity of the apparent viscosity-Ji slurry of embodiment)/base slurry。
From evaluation result it can be seen that described high-temperature resisting and salt-resisting thinner is saturated brine, after 200 DEG C of aging 16h, still there is good viscosity reducing effect, wherein optimum with embodiment 3 effect, described thinner heat and salinity tolerance excellent effect is described。
Claims (6)
1. a high-temperature resisting and salt-resisting thinner, it is characterised in that: formed by 15-20 part fumaric acid, 10-15 part 2-acrylamide-2-methyl propane sulfonic, 10-15 part Sodium styrene sulfonate copolymer that copolymerization is formed under the effect of initiator are composite with the ethylenediaminetetraacetic acid of 10-15 part。
2. high-temperature resisting and salt-resisting thinner according to claim 2, described initiator is selected from following any one or two or more mixture: Ammonium persulfate., potassium peroxydisulfate, azo diisobutyl amidine dihydrochloride。
3. the preparation method of the high-temperature resisting and salt-resisting thinner described in claim 1, it is characterised in that comprise the steps:
(1) described fumaric acid is added in deionized water, 70～75 DEG C of stirring and dissolving, obtain homogeneous phase solution；
(2) in described homogeneous phase solution, add 2-acrylamide-2-methyl propane sulfonic and Sodium styrene sulfonate, after being completely dissolved, under nitrogen protection, be slowly added to initiator, 70～85 DEG C reacting by heating 4-6 hour, obtain glue；
(3) in described glue, add ethylenediaminetetraacetic acid, 70-85 DEG C of heated and stirred 1h, obtain glue solution of sticky shape；
(4) in described glue solution of sticky shape, add appropriate sodium hydroxide, regulate pH value of water solution to 9-11, then carry out spray drying, obtain described high-temperature resisting and salt-resisting thinner。
4. method according to claim 3, in described method, the deionized water of addition and the mass parts of initiator are as follows:
Deionized water: 100,
Initiator: 0.1-5。
5. method according to claim 3, described initiator is selected from following any one or two or more mixture: Ammonium persulfate., potassium peroxydisulfate, azo diisobutyl amidine dihydrochloride。
6. an application process for high-temperature resisting and salt-resisting thinner, adds the high-temperature resisting and salt-resisting thinner described in the claim 1 of 0.1-2% to base in starching。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610152931.2A CN105694831A (en) | 2016-03-17 | 2016-03-17 | High-temperature-resistant and salt-resistant viscosity reducer and preparation method and application thereof |
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| CN201610152931.2A CN105694831A (en) | 2016-03-17 | 2016-03-17 | High-temperature-resistant and salt-resistant viscosity reducer and preparation method and application thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106832115A (en) * | 2016-12-30 | 2017-06-13 | 汪逸凡 | A kind of drilling fluid preparation method of high temperature resistant thinner |
| CN107033284A (en) * | 2017-05-14 | 2017-08-11 | 张芸 | A kind of preparation method of drilling fluid extracting and cutting agent |
| CN107201218A (en) * | 2017-06-16 | 2017-09-26 | 中国石油集团渤海钻探工程有限公司 | A kind of water base bentonite viscosity depressant for drilling fluid and preparation method thereof |
| CN109111906A (en) * | 2018-09-19 | 2019-01-01 | 中国石油化工股份有限公司 | A kind of emulsifying and viscosity-reducing agent for condensed oil |
| CN109135709A (en) * | 2018-09-19 | 2019-01-04 | 中国石油化工股份有限公司 | A kind of viscosity reduction oil displacement agent and oil displacement system suitable for heavy crude reservoir |
| CN112111253A (en) * | 2019-06-19 | 2020-12-22 | 中国石油化工股份有限公司 | Dispersant for water-based drilling fluid, preparation method and application thereof |
| CN108395885B (en) * | 2017-02-08 | 2021-03-09 | 中国石油化工股份有限公司 | Sand carrying liquid for sand prevention of unconsolidated sandstone heavy oil reservoir |
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| CN1155630C (en) * | 2001-02-27 | 2004-06-30 | 北京燕山石油化工公司研究院 | Copolymer latex for reinforcing oil well and its prepn |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106832115A (en) * | 2016-12-30 | 2017-06-13 | 汪逸凡 | A kind of drilling fluid preparation method of high temperature resistant thinner |
| CN108395885B (en) * | 2017-02-08 | 2021-03-09 | 中国石油化工股份有限公司 | Sand carrying liquid for sand prevention of unconsolidated sandstone heavy oil reservoir |
| CN107033284A (en) * | 2017-05-14 | 2017-08-11 | 张芸 | A kind of preparation method of drilling fluid extracting and cutting agent |
| CN107201218A (en) * | 2017-06-16 | 2017-09-26 | 中国石油集团渤海钻探工程有限公司 | A kind of water base bentonite viscosity depressant for drilling fluid and preparation method thereof |
| CN107201218B (en) * | 2017-06-16 | 2019-12-03 | 中国石油集团渤海钻探工程有限公司 | A kind of water base bentonite viscosity depressant for drilling fluid and preparation method thereof |
| CN109111906A (en) * | 2018-09-19 | 2019-01-01 | 中国石油化工股份有限公司 | A kind of emulsifying and viscosity-reducing agent for condensed oil |
| CN109135709A (en) * | 2018-09-19 | 2019-01-04 | 中国石油化工股份有限公司 | A kind of viscosity reduction oil displacement agent and oil displacement system suitable for heavy crude reservoir |
| CN109135709B (en) * | 2018-09-19 | 2020-10-13 | 中国石油化工股份有限公司 | Viscosity-reducing oil displacement agent and oil displacement system suitable for heavy oil reservoir |
| CN109111906B (en) * | 2018-09-19 | 2020-10-13 | 中国石油化工股份有限公司 | Thick oil emulsifying viscosity reducer |
| CN112111253A (en) * | 2019-06-19 | 2020-12-22 | 中国石油化工股份有限公司 | Dispersant for water-based drilling fluid, preparation method and application thereof |
| CN112111253B (en) * | 2019-06-19 | 2022-08-12 | 中国石油化工股份有限公司 | Dispersant for water-based drilling fluid, preparation method and application thereof |
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Application publication date: 20160622 |