CN104388061A - High-temperature-resistant salt-resistant polymer filtrate reducer used in water-based drilling fluid and preparation method thereof - Google Patents
High-temperature-resistant salt-resistant polymer filtrate reducer used in water-based drilling fluid and preparation method thereof Download PDFInfo
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- CN104388061A CN104388061A CN201410513354.6A CN201410513354A CN104388061A CN 104388061 A CN104388061 A CN 104388061A CN 201410513354 A CN201410513354 A CN 201410513354A CN 104388061 A CN104388061 A CN 104388061A
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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
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/035—Organic additives
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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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- 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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- 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
- C08F220/585—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide containing oxygen in addition to the carbonamido oxygen, e.g. N-methylolacrylamide, N-(meth)acryloylmorpholine and containing other heteroatoms, e.g. 2-acrylamido-2-methylpropane sulfonic acid [AMPS]
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Abstract
The invention relates to a high-temperature-resistant salt-resistant polymer filtrate reducer used in a water-based drilling fluid and a preparation method thereof. The technical scheme mainly solves the problems that a drilling fluid in a deep well or a superdeep well is low in viscosity retention rate after the drilling fluid resists temperature, salts and high-temperature ageing. The filtrate reducer comprises the compositions in parts by weight: 8-39 parts of N-vinylcaprolactam, 20-100 parts of 2-acrylamide-2-methylpropanesulfonic acid, 20-50 parts of acrylic acid, 10-45 parts of N,N-dimethylacrylamide, and 100-200 parts of water. The concrete preparation method comprises: neutralizing an acidic monomer with sodium hydroxide, controlling the pH value of the system to be 7.0-11.0, then adding a nonionic monomer, stirring for dissolving, taking an oxidation-reduction initiation system as an initiator, performing water solution polymerization in the presence of a molecular-weight regulator, and controlling the reaction temperature to be 25-60 DEG C and the reaction time to be 4-6 h, so as to obtain a colloidal product, baking the colloidal product, and crushing to obtain the polymer filtrate reducer. The high-temperature-resistant salt-resistant polymer filtrate reducer used in the water-based drilling fluid is capable of reducing drilling-fluid filter loss by 50-80% after being subjected to 260 DEG C high-temperature high-pressure ageing.
Description
Technical field
The present invention relates to a kind of fluid loss agent in oilfield chemistry drilling technique field, especially a kind of water-base drilling fluid high-temperature resisting and salt-resisting polymer filtrate reducer and preparation method thereof.
Background technology
Water-base drilling fluid polymer class fluid loss agent, major part forms with vinylsulfonate and this two classes monomer polymerization of vinyl amide.This base polymer roughly comprises vinyl sulfonate monomers and derivative thereof, as: 2-acrylamide-2-methylpro panesulfonic acid (AMPS) and vinyl amide monomer and derivative thereof, as: acrylamide (AM).
At present, a lot of bibliographical information relevant with AM base polymer High Temperature High Pressure fluid loss agent to water-base drilling fluid AMPS and commerical prod is had both at home and abroad.Bibliographical information is as the polymer filtrate reducer of: horse happiness equality development, Heat stability is good in drilling fluid, heat and salinity tolerance ability is strong, with its filter loss still lower (Chongqing University of Science and Technology journal (natural science edition) after drilling fluid 200 DEG C of high temperature ageings of this fluid loss agent process, 2013,15 (2): 123-125).US Patent No. 5789349 discloses a kind of modified version water base drilling fluid system containing Controllable cross-linking polymkeric substance water retaining, there is good thermostability, wherein Controllable cross-linking polymkeric substance is formed by acrylamide, non-sulfonic group monomer containing sulfonic monomer, anionic and certain density linking agent copolymerization, and temperature resistance can reach 200 DEG C.Commerical prod is as KEMSEAL, the DURALON of MI company and the DRISCAL-D of Phillips Petroleum Company of external Baker Hughes Inc.The products such as HS600, HS300 of domestic Henan auxiliary agent company limited of Huixian Hang Seng.Above-mentioned polymer filtrate reducer at least includes these two kinds of monomers of AMPS and AM, and its molecular structure can be divided into line style and cross-linking type two kinds.Its mechanism of action is mainly: introduce the sulfonic acid group of anti-salt hydration in polymer molecule and have strong adsorbing amide group, impelling polymer molecule and clay particle to adsorb.Thus thickened the hydration shell on clay particle surface, contribute to preventing the oarse-grained formation of clay, maintain fine grain content in drilling fluid, make drilling fluid easily form comparatively fine and close mud cake, thus reach the object of filtrate reducing.
But existing polymer filtrate reducer can meet the drilling well demand within 200 DEG C substantially, cannot solve under ultra-high temperature condition, the problem that after the drilling fluid temperature resistance especially in deep-well, ultra deep well, anti-salt, high temperature ageing, viscosity retention ratio is low.
Summary of the invention
The invention reside in and overcome Problems existing in background technology, and a kind of water-base drilling fluid high-temperature resisting and salt-resisting polymer filtrate reducer and preparation method thereof is provided.This water-base drilling fluid high-temperature resisting and salt-resisting polymer filtrate reducer, can reduce drilling fluid filtration 50-80% after 260 DEG C of High Temperature High Pressure are aging, can meet the needs of the safety drilling construction under ultrahigh-temperature or hypersaline environment.Present invention also offers the preparation method of this polymer filtrate reducer simultaneously.
The present invention solves its problem and reaches by following technical scheme: a kind of water-base drilling fluid high-temperature resisting and salt-resisting polymer filtrate reducer, its component and proportioning are as follows by weight: N-caprolactam 8 ~ 39 parts, 2-acrylamide-2-methylpro panesulfonic acid 20 ~ 100 parts, 20 ~ 50 parts, vinylformic acid, N, N-2 Methacrylamide 10 ~ 45 parts, 100 ~ 200 parts, water.
A preparation method for water-base drilling fluid high-temperature resisting and salt-resisting polymer filtrate reducer, comprises the following steps:
(1) 100 ~ 200 parts of water are added reactor, add 2-acrylamide-2-methylpro panesulfonic acid 20 ~ 100 parts, 20 ~ 50 parts, vinylformic acid successively, pH=7.0 ~ 11.0 are neutralized to alkali, add N-caprolactam 8 ~ 39 parts and N again, N-2 Methacrylamide 10 ~ 45 parts, is stirred well to dissolving;
(2) pass into nitrogen after 30 minutes, add 0.01 ~ 0.6 part of molecular weight regulator under agitation, 0.1 ~ 1.5 part of oxidation-reduction initiator, polymeric reaction temperature is 25 ~ 60 DEG C, and the maintenance reaction times is 4 ~ 6h, finally obtains gelatinoid;
(3) namely gelatinoid is obtained polymer filtrate reducer after broken, oven dry, pulverizing.
In described oxidation-reduction initiator, oxygenant is the one in Potassium Persulphate, ammonium persulphate and hydrogen peroxide, and reductive agent is the one in sodium bisulfite, Sodium Pyrosulfite, iron protochloride and ferrous sulfate; Described molecular weight regulator is Virahol or lauryl mercaptan.
The present invention can have following beneficial effect compared with above-mentioned background technology: this water-base drilling fluid high-temperature resisting and salt-resisting polymer filtrate reducer product good water solubility, aqueous solution polymerization mode is adopted to prepare, reaction process easily controls, simple to operate, constant product quality, environmentally safe; Both there is stronger filtrate reducing effect, there is very strong saline-alkaline tolerance simultaneously, bottom temperature can have been met higher than 260 DEG C, the needs of safety drilling construction under high salt (saturated salt) environment.It is few that product of the present invention has dosage, can be mixed in fresh-water drilling fluid use by the amount of 0.3% ~ 2%, and not thickening.The effect played due to temperature resistance group in molecular structure is stronger, effectively prevent high temperature to the Degradation of fluid loss agent, its adsorption group is also stronger, effectively prevent treatment agent at high operating temperatures with clay particle generation desorption, thus viscosity retention ratio is higher after weathering to make drilling fluid, the effect that fluid loss agent continues is also longer.
Embodiment:
Below in conjunction with specific embodiment, the invention will be further described:
Embodiment 1
Four-hole boiling flask is fixed on the heating, agitator and reflux condensing tube is installed, adds and need water gaging, under agitation by acid monomer and vinylformic acid 20g, 2-acrylamide-2-methylpro panesulfonic acid 83g, be stirred to whole dissolving; Then add sodium hydroxide 28g, fully stir; Then add 30gN-caprolactam and N, N-2 Methacrylamide 40g, stir and make it dissolve; With the aqueous sodium hydroxide solution of massfraction 20 ~ 40%, the pH value of system is adjusted to 8; After passing into high pure nitrogen 30min to system, under agitation add relative nonlinear error Virahol 5g, initiator ammonium persulfate 0.6g, reductive agent sodium bisulfite 0.3g successively, after stirring, system is heated to 40 DEG C, react and obtain jelly after 5 hours, by jelly through broken, dry, pulverize and obtain ultrahigh-temperature polymer filtrate reducer.
The step of embodiment 2 ~ 7 is identical with embodiment 1, and concrete reactant and reaction conditions are in table 1.
Table 1 reactive material dosage and synthesis condition
1, temperature resistance and filtrate reducing effect assessment
Fresh-water drilling fluid consists of 3% bentonite slurry+3% sulfonated gilsonite+0.5%NaOH.Salt-water drilling fluid consists of 3% bentonite slurry+3% sulfonated gilsonite+0.5%NaOH+1%XJ viscosity-depression agent+0.1%Span80 tensio-active agent+4%NaCl; Saturated salt-water drilling fluid consists of 3% bentonite slurry+3% sulfonated gilsonite+1%NaOH+1%XJ viscosity-depression agent+0.1%Span80 tensio-active agent+NaCl to saturated.Above drilling fluid composition all increases the weight of to 1.3g/cm with ground barium sulfate
3.Drilling fluid is aging 16h under 260 DEG C of conditions, after high-speed stirring 20min, at 60 DEG C, measures property of drilling fluid, and high temperature and high pre ssure filtration (FLHTHP), in 220 DEG C, records under pressure reduction 3.5MPa.Fluid loss agent performance prepared in above-described embodiment 1 is in table 2.
Table 2 property of drilling fluid
Above test result shows, the fluid loss agent of the present invention has good rheological and filtrate reducing effect in fresh water, 4.0wt% salt solution and saturated salt-water drilling fluid system, still maintains good stability after 260 DEG C of heat roll 16h.Therefore this fluid loss agent product can meet the needs of bottom temperature higher than the safety drilling construction under 260 DEG C and high salt (saturated salt) environment.
2, with the performance comparison of common polymer fluid loss agent
Using the polymkeric substance in embodiment 3 as reference sample, carry out performance comparison test with external previous generation product DRISCAL-D and home products HS600, verify the superiority of synthetic polymer fluid loss agent product of inventing.Experiment condition is in fresh water and 4.0wt% brine system, adds the fluid loss agent of equal in quality, all with ground barium sulfate increase the weight of to density be 1.3g/cm
3.After 260 DEG C of high temperature ageing 16h, pyrometry high pressure (220 DEG C) filter loss.Experimental data is in table 3:
Table 3 high temperature and high pre ssure filtration contrasts
Above test result shows, the high-temperature resisting and salt-resisting fluid loss agents of the present embodiment has good rheological and filtrate reducing effect in fresh water and 4.0wt% salt-water drilling fluid base slurry, and 260 DEG C of heat are rolled property retention after 16 hours and stablized, and are obviously better than similar filtrate reducing product.Therefore, this fluid loss agents product uses under being suitable for deep-well, ultra deep well high-temperature and high-pressure conditions.
Claims (4)
1. a water-base drilling fluid high-temperature resisting and salt-resisting polymer filtrate reducer, its component and proportioning are as follows by weight: N-caprolactam 8 ~ 39 parts, 2-acrylamide-2-methylpro panesulfonic acid 20 ~ 100 parts, 20 ~ 50 parts, vinylformic acid, N, N-2 Methacrylamide 10 ~ 45 parts, 100 ~ 200 parts, water.
2. a preparation method for water-base drilling fluid high-temperature resisting and salt-resisting polymer filtrate reducer according to claim 1, is characterized in that: comprise the following steps:
(1) 100 ~ 200 parts of water are added reactor, add 2-acrylamide-2-methylpro panesulfonic acid 20 ~ 100 parts, 20 ~ 50 parts, vinylformic acid successively, be neutralized to pH=7.0 ~ 11.0 with alkali, then add N-caprolactam 8 ~ 39 parts and N, N-2 Methacrylamide 10 ~ 45 parts, is stirred well to dissolving;
(2) pass into nitrogen after 30 minutes, add 0.01 ~ 0.6 part of molecular weight regulator under agitation, 0.1 ~ 1.5 part of oxidation-reduction initiator, polymeric reaction temperature is 25 ~ 60 DEG C, and the maintenance reaction times is 4 ~ 6h, finally obtains gelatinoid;
(3) namely gelatinoid is obtained polymer filtrate reducer after broken, oven dry, pulverizing.
3. a kind of water-base drilling fluid high-temperature resisting and salt-resisting polymer filtrate reducer according to claim 2 and preparation method thereof, it is characterized in that: in described oxidation-reduction initiator, oxygenant is the one in Potassium Persulphate, ammonium persulphate and hydrogen peroxide, and reductive agent is the one in sodium bisulfite, Sodium Pyrosulfite, iron protochloride and ferrous sulfate.
4. a kind of water-base drilling fluid high-temperature resisting and salt-resisting polymer filtrate reducer according to claim 2 and preparation method thereof, is characterized in that: described molecular weight regulator is Virahol or lauryl mercaptan.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104927803A (en) * | 2015-04-24 | 2015-09-23 | 中国石油大学(华东) | Polymeric filtrate loss reducer with high temperature and high pressure resistances for drilling fluid |
| WO2016178669A1 (en) * | 2015-05-05 | 2016-11-10 | Halliburton Energy Services, Inc. | Activators for inorganic oxide breakers |
| CN109293829A (en) * | 2018-10-23 | 2019-02-01 | 四川泓华油气田工程科技有限公司 | A kind of anti-divalent salts fluid loss additive of drilling fluid high temperature and preparation method thereof |
| CN111285964A (en) * | 2020-03-10 | 2020-06-16 | 长江大学 | Temperature-resistant and salt-resistant micro-crosslinked fluid loss additive for drilling fluid and preparation method thereof |
| WO2020257002A1 (en) * | 2019-06-18 | 2020-12-24 | M-I L.L.C. | Crosslinked synthetic polymer-based reservoir drilling fluid |
| CN112341550A (en) * | 2019-08-08 | 2021-02-09 | 中国石油天然气集团有限公司 | Modified polymer, preparation method thereof and high-salt-content water-based waste drilling fluid gel breaker |
| CN112679648A (en) * | 2020-12-25 | 2021-04-20 | 中国石油集团渤海钻探工程有限公司 | High-temperature-resistant filtrate reducer for drilling fluid and preparation method thereof |
| CN113527575A (en) * | 2021-07-29 | 2021-10-22 | 长江大学 | Hyperbranched polymer filtrate reducer synthesized from pentaerythritol polyene monomer and preparation method thereof |
| CN115595129A (en) * | 2022-10-10 | 2023-01-13 | 南方海洋科学与工程广东省实验室（湛江）（Cn） | Preparation method of metal oxide-loaded clay flow pattern regulator, clay flow pattern regulator and water-based drilling fluid |
| CN115678518A (en) * | 2022-10-19 | 2023-02-03 | 中国石油大学(华东) | Environment-friendly high-temperature-resistant saturated saline water high-density polymer drilling fluid system and preparation method and application thereof |
| CN116162213A (en) * | 2023-04-23 | 2023-05-26 | 山东得顺源石油科技有限公司 | Nitrile-ketone copolymer filtrate reducer for drilling fluid and preparation method thereof |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104927803A (en) * | 2015-04-24 | 2015-09-23 | 中国石油大学(华东) | Polymeric filtrate loss reducer with high temperature and high pressure resistances for drilling fluid |
| WO2016178669A1 (en) * | 2015-05-05 | 2016-11-10 | Halliburton Energy Services, Inc. | Activators for inorganic oxide breakers |
| US10563115B2 (en) | 2015-05-05 | 2020-02-18 | Halliburton Energy Services, Inc. | Activators for inorganic oxide breakers |
| CN109293829A (en) * | 2018-10-23 | 2019-02-01 | 四川泓华油气田工程科技有限公司 | A kind of anti-divalent salts fluid loss additive of drilling fluid high temperature and preparation method thereof |
| GB2599571B (en) * | 2019-06-18 | 2023-12-20 | Schlumberger Technology Bv | Crosslinked synthetic polymer-based reservoir drilling fluid |
| WO2020257002A1 (en) * | 2019-06-18 | 2020-12-24 | M-I L.L.C. | Crosslinked synthetic polymer-based reservoir drilling fluid |
| GB2599571A (en) * | 2019-06-18 | 2022-04-06 | Schlumberger Technology Bv | Crosslinked synthetic polymer-based reservoir drilling fluid |
| CN112341550A (en) * | 2019-08-08 | 2021-02-09 | 中国石油天然气集团有限公司 | Modified polymer, preparation method thereof and high-salt-content water-based waste drilling fluid gel breaker |
| CN111285964A (en) * | 2020-03-10 | 2020-06-16 | 长江大学 | Temperature-resistant and salt-resistant micro-crosslinked fluid loss additive for drilling fluid and preparation method thereof |
| CN111285964B (en) * | 2020-03-10 | 2022-09-02 | 长江大学 | Temperature-resistant and salt-resistant micro-crosslinked fluid loss additive for drilling fluid and preparation method thereof |
| CN112679648A (en) * | 2020-12-25 | 2021-04-20 | 中国石油集团渤海钻探工程有限公司 | High-temperature-resistant filtrate reducer for drilling fluid and preparation method thereof |
| CN113527575A (en) * | 2021-07-29 | 2021-10-22 | 长江大学 | Hyperbranched polymer filtrate reducer synthesized from pentaerythritol polyene monomer and preparation method thereof |
| CN115595129B (en) * | 2022-10-10 | 2023-07-14 | 南方海洋科学与工程广东省实验室(湛江) | Preparation method of clay flow pattern regulator loaded with metal oxide, clay flow pattern regulator and water-based drilling fluid |
| CN115595129A (en) * | 2022-10-10 | 2023-01-13 | 南方海洋科学与工程广东省实验室（湛江）（Cn） | Preparation method of metal oxide-loaded clay flow pattern regulator, clay flow pattern regulator and water-based drilling fluid |
| CN115678518A (en) * | 2022-10-19 | 2023-02-03 | 中国石油大学(华东) | Environment-friendly high-temperature-resistant saturated saline water high-density polymer drilling fluid system and preparation method and application thereof |
| CN115678518B (en) * | 2022-10-19 | 2023-10-13 | 中国石油大学(华东) | Environment-friendly high-temperature-resistant saturated brine high-density polymer drilling fluid and preparation and application thereof |
| CN116162213A (en) * | 2023-04-23 | 2023-05-26 | 山东得顺源石油科技有限公司 | Nitrile-ketone copolymer filtrate reducer for drilling fluid and preparation method thereof |
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Application publication date: 20150304 |