Reversible emulsifier and preparation method thereof, and environment-friendly reversible emulsifying drilling liquid and application

A technology of emulsified drilling fluid and emulsifier, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of affecting fluorescence logging and high biological toxicity, and achieve enhanced self-cleaning performance, rapid dissolution, and enhanced emulsification effect of effect

Active Publication Date: 2017-06-13
中石化石油工程技术服务有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The reversible emulsion prepared in the prior art can achieve the purpose of pH control and reversible phase, but the oil phase used in the existing system is mostly white oil and diesel oil, such as CN105567182A; in addition, CN03133993A also uses straight-run gasoline and coked diesel oil , FCC diesel, FCC gasoline, lamp kerosene, and reformed gasoline are used as oil phases to prepare emulsions. The above-mentioned oil phases are all mineral oil base oils, which may affect fluorescence logging, have high biological toxicity, and cause environmental pollution. question

Method used

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  • Reversible emulsifier and preparation method thereof, and environment-friendly reversible emulsifying drilling liquid and application
  • Reversible emulsifier and preparation method thereof, and environment-friendly reversible emulsifying drilling liquid and application
  • Reversible emulsifier and preparation method thereof, and environment-friendly reversible emulsifying drilling liquid and application

Examples

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preparation example Construction

[0062] Two, the preparation of the humic acid fluid loss reducer in the embodiment: 25 ℃ temperature, add 5.0g humic acid (HA) in the there-necked bottle, then add 80mL dichloromethane (CH 2 Cl 2 ) and mix well, place in a water bath, stir, and mix 5mL of thionyl chloride (SOCl 2 ) slowly dropwise into the three-necked bottle. The tail gas produced in the reaction (HCl and SO 2 ) is discharged from the top of the spherical condensing tube, and the end of the spherical condensing tube is connected to the tail gas absorption device, and 30% wt. sodium hydroxide aqueous solution is added into the tail gas absorption device. Keep the temperature at 25°C. After reacting for 15 hours, add 0.1g of 4-dimethylaminopyridine (DMAP) into the three-necked flask, and slowly introduce dry ammonia gas, and continue the reaction under stirring conditions (keep at 25°C), and keep tail gas absorption , Reaction 8h. Stop the reaction, remove the three-necked flask, pour the reaction product i...

Embodiment 1

[0064] Example 1, Synthesis of reversible emulsifier, starting materials: dodecylamine and dodecylsulfonic acid, perfluorooctanesulfonic acid, chloroacetic acid

[0065] Add dodecylamine, dodecyl sulfonic acid, perfluorooctane sulfonic acid, and chloroacetic acid in a three-necked flask with a thermometer, agitator, and condenser at a molar ratio of 1.1:0.5:0.3:0.3, at a temperature of 120°C After reflux reaction for 3 hours, vacuumize, remove the water generated by the reaction at a vacuum degree of 13kPa, continue the reaction for 1 hour, and after cooling to room temperature, add 20% isopropanol of the total weight of the initial raw materials, and 2% of the total weight of the initial raw materials. -15. Pingpingjia O-8 with 5% of the total weight of the initial raw materials, after stirring evenly, reflux for 1 hour to obtain a reversible emulsifier.

Embodiment 2

[0066] Example 2, the synthesis of reversible emulsifier, starting materials: tetradecylamine and dodecylsulfonic acid, perfluorooctanesulfonic acid, chloroacetic acid

[0067] Add tetradecylamine, dodecyl sulfonic acid, perfluorooctane sulfonic acid, and chloroacetic acid in a three-necked flask with a thermometer, agitator, and condenser at a molar ratio of 1.1:0.5:0.3:0.3, at a temperature of 130°C After reflux reaction for 2 hours, vacuumize, remove the water produced by the reaction at a vacuum degree of 14kPa, continue the reaction for 3 hours, and after cooling to room temperature, add 30% of the total weight of the initial raw materials. -15. Add Pingping O-8 with 5% of the total weight of the initial raw materials, stir evenly, and reflux for 1 hour to reach the reversible emulsifier.

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Abstract

The invention relates to a reversible emulsifier and a preparation method thereof, and an environment-friendly reversible emulsifying drilling liquid and application. The reversible emulsifier is prepared from the following raw materials: initial raw materials: C10-C20 alkyl primary amine, C10-C20 alkyl sulfonic acid, perfluorooctane sulfonate and chloroacetic acid; additives: isopropanol, peregal O-15, and peregal O-8. The environment-friendly reversible emulsifying drilling liquid is prepared by the following steps of stirring an oil phase, the reversible emulsifier and a water phase at high speed, adding alcohols with carbon number less than 4, straight-chain alcohols with carbon number of 8 to 14, quaternary ammonium salt-modified organobentonite, humic acid filtrate loss reducer, calcium oxide and choline chloride, and then adding weighing material, so as to reach the required density of the drilling liquid. The invention also provides a phase transfer method of the reversible emulsifying drilling liquid. The phase transfer method has the advantages that according to production requirements, the phases of the drilling liquid can be conveniently transferred, and the drilling liquid is stable under the two states of W/O (water/oil), and O/W (oil/water), and can be repeatedly used.

Description

technical field [0001] The invention relates to an environment-friendly reversible emulsifier, a preparation method thereof, an environment-friendly reversible emulsified drilling fluid and its application, and belongs to the technical field of oil field chemistry. Background technique [0002] The reversible emulsion can reversibly change between oil-in-water emulsion and water-in-oil emulsion by changing the external conditions, and achieve the best use effect by realizing the transition between different types of emulsion in different stages . The use of reversible emulsions in drilling fluids is of great significance to the development of drilling fluids. During the drilling process, the oil-based emulsion has good thermal stability, lubricity, anti-slump inhibition and reservoir protection, and its performance is obviously better than that of water-based drilling fluid. However, in the process of well completion, the use of oil-based drilling fluid has the problems of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035C09K8/36C09K8/28
Inventor 郭保雨王旭东王彦玲邱维清王宝田蒋莉何兴华赵红香刘飞任金恒
Owner 中石化石油工程技术服务有限公司
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