CN104152122A - Viscosity reducer for oil-based drilling fluid and preparation method thereof - Google Patents

Viscosity reducer for oil-based drilling fluid and preparation method thereof Download PDF

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Publication number
CN104152122A
CN104152122A CN201410341661.0A CN201410341661A CN104152122A CN 104152122 A CN104152122 A CN 104152122A CN 201410341661 A CN201410341661 A CN 201410341661A CN 104152122 A CN104152122 A CN 104152122A
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China
Prior art keywords
viscosity
drilling fluid
depression agent
oil
reaction
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CN201410341661.0A
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CN104152122B (en
Inventor
黄伟
李英敏
冯杰
惠保同
赵家乐
王建华
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China National Petroleum Corp
CNPC Engineering Technology R&D Co Ltd
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China National Petroleum Corp
CNPC Drilling Research Institute Co Ltd
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Priority to CN201410341661.0A priority Critical patent/CN104152122B/en
Priority claimed from CN201410341661.0A external-priority patent/CN104152122B/en
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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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/34—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives
    • C08G65/48—Polymers modified by chemical after-treatment
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2650/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G2650/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule characterized by the type of post-polymerisation functionalisation
    • C08G2650/04—End-capping
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2650/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G2650/28—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule characterised by the polymer type
    • C08G2650/50—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule characterised by the polymer type containing nitrogen, e.g. polyetheramines or Jeffamines(r)

Abstract

The invention provides a viscosity reducer for oil-based drilling fluid and a preparation method thereof. The viscosity reducer is a superpolymer surfactant, and is prepared by the steps of: synthesizing a terpolymer from polyethylene glycol, maleic anhydride and polyethylene polyamine, wherein the molar ratio of polyethylene glycol to maleic anhydride to polyethylene polyamine is (1-3) to (2-4) to (3-8); cooling after reacting. The viscosity reducer has significant diluting and viscosity-reducing functions on the oil-based drilling fluid.

Description

Viscosity-depression agent and preparation method thereof for a kind of oil base drilling fluid
Technical field
The present invention relates to viscosity-depression agent and preparation method thereof for a kind of oil base drilling fluid, belong to drilling technique field.
Background technology
Drilling fluid in use, usually, because temperature raises, invade by salt contamination or calcium, and the reasons such as solid load increase or treatment agent inefficacy, strengthen the reticulated structure that drilling fluid forms, and drilling fluid viscosity, shear force increase.Viscosity, shear force cross conference cause turn on pump difficulty, drilling cuttings to be difficult to remove or drilling process in the problems such as surge pressure is excessive, when serious, also can cause the various complexcase in down-hole to occur.Therefore, in drilling fluid operation and maintenance process, often need to add viscosity-depression agent, to reduce viscosity and the shear force of system, make it have suitable rheological.
Water-base drilling fluid viscosity-depression agent mainly contains tannin class, lignin sulfonate, XY-27 etc. at present.But the relevant report of relevant oil base drilling fluid viscosity-depression agent but seldom.
Summary of the invention
For solving the problems of the technologies described above, the object of the present invention is to provide a kind of oil base drilling fluid viscosity-depression agent.Viscosity-depression agent of the present invention has the effect of significant dilution viscosity reduction to oil base drilling fluid.
The present invention also aims to provide the preparation method of above-mentioned oil base drilling fluid with viscosity-depression agent.
For achieving the above object, the invention provides a kind of oil base drilling fluid viscosity-depression agent, wherein, this viscosity-depression agent comprises the terpolymer being comprised of polyoxyethylene glycol, MALEIC ANHYDRIDE and polyethylene polyamine; Three's mol ratio is 1-3:2-4:3-8.
In above-mentioned viscosity-depression agent, preferably, the molecular weight of the polyoxyethylene glycol adopting is 200-2000.
The present invention also provides the preparation method of above-mentioned oil base drilling fluid with viscosity-depression agent, and the method comprises the following steps:
A, using diesel oil as solvent, polyoxyethylene glycol and MALEIC ANHYDRIDE are added in solvent and mixed, under whipped state, be heated to 85 ℃, reaction 6h, obtains ester compound;
B, in above-mentioned ester compound, add polyethylene polyamine, till pH ﹥ 7, reaction 6h, obtains terpolymer.
Advantage of the present invention is: contain-OH of this product ,-COO-,-CONH-group, these groups can with organophilic clay in organic group form hydrogen bond, thereby can effectively break the interaction between organic group and oil in organophilic clay, and this series products can and oil between have good consistency, thereby can be dispersed in oil base drilling fluid well, and then reduce the viscosity of oil base drilling fluid.
Embodiment
For technical characterictic of the present invention, object and beneficial effect being had more clearly, understand, existing technical scheme of the present invention is carried out to following detailed description, but can not be interpreted as restriction that can practical range of the present invention.
Embodiment 1
The present embodiment provides a kind of oil base drilling fluid viscosity-depression agent, and it is prepared by following steps:
(1) use polyoxyethylene glycol and MALEIC ANHYDRIDE synthesizing ester compound:
Take diesel oil as solvent, get 30mL diesel oil in reactor, adding molecular weight is 600 polyoxyethylene glycol liquid 300g, add again white solid MALEIC ANHYDRIDE 70g, under whipped state, be heated to 85 ℃ of reaction 6h, system color becomes yellow solution from colourless solution rapidly, and white particle constantly reduces, finally obtain ester compound.
(2) terpolymer is synthetic:
On the basis of above-mentioned (1) synthetic ester compound, slowly also constantly add polyethylene polyamine (molar mass is 439g/mol) to react, constantly survey its pH value simultaneously, until pH value is greater than 7, now the add-on of polyethylene polyamine is 413g, and after reaction 6h, normal temperature is down in reaction, obtain terpolymer, i.e. oil base drilling fluid viscosity-depression agent.
Embodiment 2
The present embodiment provides a kind of oil base drilling fluid viscosity-depression agent, and it is prepared by following steps:
(1) use polyoxyethylene glycol and MALEIC ANHYDRIDE synthesizing ester compound:
Take diesel oil as solvent, get 30mL diesel oil in reactor, adding molecular weight is 600 polyoxyethylene glycol liquid 300g, add again white solid MALEIC ANHYDRIDE 49g, under whipped state, be heated to 85 ℃ of reaction 6h, system color becomes yellow solution from colourless solution rapidly, and white particle constantly reduces, finally obtain ester compound.
(2) terpolymer is synthetic:
On the basis of above-mentioned (1) synthetic ester compound, slowly also constantly add polyethylene polyamine (molar mass is 439g/mol) to react, constantly survey its pH value simultaneously, until pH value is greater than 7, now the add-on of polyethylene polyamine is 293g, and after reaction 6h, normal temperature is down in reaction, obtain terpolymer, i.e. oil base drilling fluid viscosity-depression agent.
Embodiment 3
The present embodiment provides a kind of oil base drilling fluid viscosity-depression agent, and it is prepared by following steps:
(1) use polyoxyethylene glycol and MALEIC ANHYDRIDE synthesizing ester compound:
Take diesel oil as solvent, get 30mL diesel oil in reactor, adding molecular weight is 600 polyoxyethylene glycol liquid 300g, add again white solid MALEIC ANHYDRIDE 33g, under whipped state, be heated to 85 ℃ of reaction 6h, system color becomes yellow solution from colourless solution rapidly, and white particle constantly reduces, finally obtain ester compound.
(2) terpolymer is synthetic:
On the basis of above-mentioned (1) synthetic ester compound, slowly also constantly add polyethylene polyamine (molar mass is 439g/mol) to react, constantly survey its pH value simultaneously, until pH value is greater than 7, now the add-on of polyethylene polyamine is 366g, and after reaction 6h, normal temperature is down in reaction, obtain terpolymer, i.e. oil base drilling fluid viscosity-depression agent.
Embodiment 4
The present embodiment provides a kind of oil base drilling fluid viscosity-depression agent, and it is prepared by following steps:
(1) use polyoxyethylene glycol and MALEIC ANHYDRIDE synthesizing ester compound:
Take diesel oil as solvent, get 30mL diesel oil in reactor, adding molecular weight is 300 polyoxyethylene glycol liquid 150g, add again white solid MALEIC ANHYDRIDE 70g, under whipped state, be heated to 85 ℃ of reaction 6h, system color becomes yellow solution from colourless solution rapidly, and white particle constantly reduces, finally obtain ester compound.
(2) terpolymer is synthetic:
On the basis of above-mentioned (1) synthetic ester compound, slowly also constantly add polyethylene polyamine (molar mass is 439g/mol) to react, constantly survey its pH value simultaneously, until pH value is greater than 7, now the add-on of polyethylene polyamine is 413g, and after reaction 6h, normal temperature is down in reaction, obtain terpolymer, i.e. oil base drilling fluid viscosity-depression agent.
Embodiment 5
The present embodiment provides a kind of oil base drilling fluid viscosity-depression agent, and it is prepared by following steps:
(1) use polyoxyethylene glycol and MALEIC ANHYDRIDE synthesizing ester compound:
Take diesel oil as solvent, get 30mL diesel oil in reactor, adding molecular weight is 300 polyoxyethylene glycol liquid 150g, add again white solid MALEIC ANHYDRIDE 49g, under whipped state, be heated to 85 ℃ of reaction 6h, system color becomes yellow solution from colourless solution rapidly, and white particle constantly reduces, finally obtain ester compound.
(2) terpolymer is synthetic:
On the basis of above-mentioned (1) synthetic ester compound, slowly also constantly add polyethylene polyamine (molar mass is 439g/mol) to react, constantly survey its pH value simultaneously, until pH value is greater than 7, now the add-on of polyethylene polyamine is 293g, and after reaction 6h, normal temperature is down in reaction, obtain terpolymer, i.e. oil base drilling fluid viscosity-depression agent.
Embodiment 6
The present embodiment provides a kind of oil base drilling fluid viscosity-depression agent, and it is prepared by following steps:
(1) use polyoxyethylene glycol and MALEIC ANHYDRIDE synthesizing ester compound:
Take diesel oil as solvent, get 30mL diesel oil in reactor, adding molecular weight is 300 polyoxyethylene glycol liquid 150g, add again white solid MALEIC ANHYDRIDE 33g, under whipped state, be heated to 85 ℃ of reaction 6h, system color becomes yellow solution from colourless solution rapidly, and white particle constantly reduces, finally obtain ester compound.
(2) terpolymer is synthetic:
On the basis of above-mentioned (1) synthetic ester compound, slowly also constantly add polyethylene polyamine (molar mass is 439g/mol) to react, constantly survey its pH value simultaneously, until pH value is greater than 7, now the add-on of polyethylene polyamine is 413g, and after reaction 6h, normal temperature is down in reaction, obtain terpolymer, i.e. oil base drilling fluid viscosity-depression agent.
Test case:
The oil base drilling fluid as follows embodiment of the present invention 1-6 being provided carries out performance test with viscosity-depression agent:
1, tested object:
Blank sample: oil-water mixture (diesel oil: the CaCl that concentration is 20wt% 2=360mL:40mL)+4.0% primary emulsion+4.0% co-emulsifier+2% organophilic clay+4% fluid loss agent+3% alkalinity regulator CaO+ barite increases the weight of (950g);
Control sample: add viscosity-depression agent in above-mentioned drilling fluid (blank sample), the quality that adds of this kind of viscosity-depression agent is 2% of described drilling fluid quality;
Test specimens 1-6: test specimens 1-6 is respectively the viscosity-depression agent that in above-mentioned drilling fluid, interpolation is provided by embodiment of the present invention 1-6, and the add-on of described viscosity-depression agent is 2% of described drilling fluid quality.
2, testing method:
(1) mensuration of rheological property and filter loss:
Tested object high-speed stirring, after 20 minutes, is sealed and carries out maintenance in 24 hours, and high-speed stirring 10 minutes again after maintenance, surveys its apparent viscosity, plastic viscosity and yield value.
Then tested object is packed in digestion tank into heat at 150 ℃ and roll 16 hours, be cooled to room temperature, move into stirred pot high speed and stir 20 minutes, survey its rheological property.
3, viscosity reducing effect represents:
Viscosity-depression agent viscosity reducing effect represents with parameter DI, and its calculation formula is as follows:
DI＝[(Ф600 0-Ф600)]/Ф600 0]×10％
In formula, DI-viscosity break ratio, %;
Ф 600 0-with Ф 600 readings of viscosity-depression agent drilling fluid;
Ф 600-add Ф 600 readings of viscosity-depression agent drilling fluid;
Rheological property is measured according to the method for GB GB/T16783.1-2006 regulation, and determination data is referring to table 1.
Table 1
From above-mentioned 6 embodiment, can find out, when the add-on of viscosity-depression agent is 2%, viscosity break ratio reaches as high as more than 30%, and this viscosity-depression agent has kept good thermostability in the time of 150 ℃.Viscosity-depression agent in the present invention is a kind of novel oil base drilling fluid viscosity-depression agent, and this viscosity-depression agent is with low cost, and applied range has been widened the range of application of oil base drilling fluid, has greatly made up the blank of domestic oil base drilling fluid viscosity-depression agent.

Claims (3)

1. an oil base drilling fluid viscosity-depression agent, wherein, this viscosity-depression agent comprises by the synthetic terpolymer of polyoxyethylene glycol, MALEIC ANHYDRIDE and polyethylene polyamine; Three's mol ratio is 1-3:2-4:3-8.
2. viscosity-depression agent according to claim 1, wherein, the molecular weight of described polyoxyethylene glycol is 200-2000.
3. the preparation method of viscosity-depression agent according to claim 1 and 2, the method comprises the following steps:
A, using diesel oil as solvent, polyoxyethylene glycol and MALEIC ANHYDRIDE are added in solvent and mixed, under whipped state, be heated to 85 ℃, reaction 6h, obtains ester compound;
B, in described ester compound, add polyethylene polyamine, till pH ﹥ 7, reaction 6h, obtains terpolymer.
CN201410341661.0A 2014-07-17 A kind of oil base drilling fluid thinner and preparation method thereof Active CN104152122B (en)

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Application Number Priority Date Filing Date Title
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CN104152122B CN104152122B (en) 2017-01-04

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
CN105950124A (en) * 2016-05-09 2016-09-21 中国石油天然气集团公司 Diluent for oil-based drilling fluid, preparation method and application thereof
CN106281264A (en) * 2016-08-08 2017-01-04 东营华力石油技术股份有限公司 A kind of compound heavy crude heat extraction thinner and preparation method thereof
CN106753281A (en) * 2016-11-09 2017-05-31 中国石油集团长城钻探工程有限公司 A kind of oil base drilling fluid low temperature rheological behaviour modifier and preparation method thereof
CN112358857A (en) * 2020-11-11 2021-02-12 中石化石油工程技术服务有限公司 Viscosity reducer for oil-based drilling fluid and preparation method and application thereof

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105950124A (en) * 2016-05-09 2016-09-21 中国石油天然气集团公司 Diluent for oil-based drilling fluid, preparation method and application thereof
CN105950124B (en) * 2016-05-09 2018-08-10 中国石油天然气集团公司 A kind of diluent of oil base drilling fluid and its preparation method and application
CN106281264A (en) * 2016-08-08 2017-01-04 东营华力石油技术股份有限公司 A kind of compound heavy crude heat extraction thinner and preparation method thereof
CN106753281A (en) * 2016-11-09 2017-05-31 中国石油集团长城钻探工程有限公司 A kind of oil base drilling fluid low temperature rheological behaviour modifier and preparation method thereof
CN106753281B (en) * 2016-11-09 2019-04-02 中国石油集团长城钻探工程有限公司 A kind of oil base drilling fluid low temperature rheological behaviour modifier and preparation method thereof
CN112358857A (en) * 2020-11-11 2021-02-12 中石化石油工程技术服务有限公司 Viscosity reducer for oil-based drilling fluid and preparation method and application thereof

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