High temperature resistant oil-based drilling fluid emulsifier and preparation method thereof

An oil-based drilling fluid and emulsifier technology, applied in the field of oil drilling, can solve the problems of poor high-temperature emulsification effect, large gap, and large amount of addition, and achieves the ability to ensure emulsification stability, good emulsification, and strong high temperature resistance. Effect

Active Publication Date: 2017-02-08
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most domestic oil-based drilling fluid emulsifiers are sorbitan monooleate (Span-80) or its derivatives. Its biggest disadvantage is that the high-temperature emulsification effect is not good and the dosage is large, which is different from similar foreign products. Compared with the large gap, it has seriously restricted the application of domestic oil-based drilling fluid technology in high-temperature deep wells

Method used

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  • High temperature resistant oil-based drilling fluid emulsifier and preparation method thereof
  • High temperature resistant oil-based drilling fluid emulsifier and preparation method thereof
  • High temperature resistant oil-based drilling fluid emulsifier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Dissolve 9 parts of polyisobutylene (molecular weight 1000-1200) and 2 parts of maleic anhydride in 22 parts of solvent xylene, add to the reaction kettle, heat to 150°C, pressurize to 0.6MPa with nitrogen, Reaction 8h, obtain polyisobutylene succinic anhydride;

[0022] (2) Reduce the temperature in the reactor to room temperature and release the pressure, add 4 parts of polyethylene polyamine, raise the temperature to 110°C, and react for 6 hours under normal pressure, so that polyethylene polyamine and polyisobutylene succinic anhydride undergo condensation reaction;

[0023] (3) Heating up to 150° C. to recover the solvent by distillation under normal pressure. After the distillation is completed, the temperature is raised to 200° C. to recover unreacted reactants by distillation, and the obtained product is polyolefin succinimide, the primary product of the emulsifier;

[0024] (4) Evenly mix the primary product of the emulsifier with 4 parts of polyethylene gl...

Embodiment 2

[0026] (1) Dissolve 12 parts of polyisobutylene (molecular weight 1000-1200) and 1 part of maleic anhydride in 20 parts of solvent xylene, add to the reaction kettle, heat to 160 ° C, pressurize to 0.7 MPa with nitrogen, Reaction 10h, obtain polyisobutylene succinic anhydride;

[0027] (2) Reduce the temperature in the reactor to room temperature and release the pressure, add 3 parts of polyethylene polyamine, heat up to 120°C, and react for 5 hours under normal pressure, so that polyethylene polyamine and polyisobutylene succinic anhydride undergo condensation reaction;

[0028] (3) Heating up to 155° C. to distill and recover the solvent under normal pressure. After the distillation is completed, the temperature is raised to 205° C. to distill and recover the unreacted reactants. The product obtained is polyolefin succinimide, the primary product of the emulsifier;

[0029] (4) Uniformly mix the primary product of the emulsifier with 3 parts of polyethylene glycol and 3 part...

Embodiment 3

[0031] (1) Dissolve 10 parts of polyisobutylene (molecular weight 1000-1200) and 3 parts of maleic anhydride in 18 parts of solvent xylene, add to the reaction kettle, heat to 160 °C, pressurize to 0.5 MPa with nitrogen, Reaction 9h, obtain polyisobutylene succinic anhydride;

[0032] (2) Reduce the temperature in the reactor to room temperature and release the pressure, add 5 parts of polyethylene polyamine, raise the temperature to 130°C, and react for 4 hours under normal pressure, so that polyethylene polyamine and polyisobutylene succinic anhydride undergo condensation reaction;

[0033] (3) Heating up to 155° C. to distill and recover the solvent under normal pressure. After the distillation is completed, the temperature is raised to 205° C. to distill and recover the unreacted reactants. The product obtained is polyolefin succinimide, the primary product of the emulsifier;

[0034] (4) Evenly mix the primary product of the emulsifier with 2 parts of polyethylene glycol ...

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Abstract

The invention discloses a high-temperature-resistant oil-base drilling fluid emulsifier which is prepared by reacting the following components in parts by weight: 9-12 parts of polyolefin, 1-3 parts of maleic anhydride, 18-22 parts of xylene, 3-5 parts of polyethylene polyamine, 2-4 parts of polyethyleneglycol and 1-3 parts of octyl phenol polyethenoxy ether. The invention also discloses a preparation method of the emulsifier. The emulsifier has better emulsifying effect on the water-in-oil drilling fluid system which uses diesel and white oil as continuous phases, has superhigh high-temperature resistance, can keep high emulsion-breaking voltage of the oil-base drilling fluid at the high temperature of 200 DEG C or so, and can enduringly ensure the emulsifying stability, rheological property and pollution resistance of the oil-base drilling fluid.

Description

[0001] Technical field: [0002] The invention relates to the field of petroleum drilling, in particular to a high-temperature resistant oil-based drilling fluid emulsifier and a preparation method thereof. [0003] Background technique: [0004] Oil-based drilling fluid has excellent characteristics such as strong inhibition, high temperature resistance, anti-pollution, and excellent protection of oil layers, and occupies an important position in the global drilling fluid market. Oil-based drilling fluid is suitable for drilling complex formations, such as highly water-sensitive formations, high-temperature and high-pressure formations in deep wells, thick salt-gypsum formations and salt-rock formations, etc., and its advantages are unmatched by water-based drilling fluids. At present, oil-based drilling fluid has become an important means of drilling high-difficulty, high-temperature deep wells, high-inclination directional wells, horizontal wells and various complex wells. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035C09K8/36C08F10/10C08F8/32C08F8/46
CPCC08G73/10C09K8/035C09K8/36
Inventor 郝惠军刘艳刘学玲张黎黎田野贾东民
Owner BC P INC CHINA NAT PETROLEUM CORP
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