阅读说明：本技术 一种乳化剂及其制备方法和应用 (Emulsifier and preparation method and application thereof ) 是由 李万强 胡宗建 钱帆 何涛 张谦 邵平 王燕 杨野 杨芮 于 2019-09-28 设计创作，主要内容包括：本发明公开了一种乳化剂及其制备方法和应用。该乳化剂包括以下重量份的组分：有机酸5～10份、氯化十六烷基吡啶20～30份、环氧乙烷10～20份、炔醇5～10份、植物油5～10份、流变调节剂1～5份,以及月桂酰肌氨酸钠1～5份。本申请制备得到的乳化剂具有优良的耐热等性能。(The invention discloses an emulsifier and a preparation method and application thereof. The emulsifier comprises the following components in parts by weight: 5-10 parts of organic acid, 20-30 parts of cetylpyridinium chloride, 10-20 parts of ethylene oxide, 5-10 parts of alkynol, 5-10 parts of vegetable oil, 1-5 parts of a rheology modifier and 1-5 parts of sodium lauroyl sarcosinate. The emulsifier prepared by the method has excellent heat resistance and other properties.)

1. The emulsifier is characterized by comprising the following components in parts by weight:

5-10 parts of organic acid, 20-30 parts of cetylpyridinium chloride, 10-20 parts of ethylene oxide, 5-10 parts of alkynol, 5-10 parts of vegetable oil, 1-5 parts of a rheology modifier and 1-5 parts of sodium lauroyl sarcosinate.

2. The emulsifier according to claim 1, comprising the following components in parts by weight:

5 parts of organic acid, 26 parts of cetylpyridinium chloride, 10 parts of ethylene oxide, 5 parts of alkynol, 5 parts of vegetable oil, 2 parts of a rheology regulator and 4 parts of sodium lauroyl sarcosinate.

3. The emulsifier according to claim 1 or 2, wherein the rheology modifier is glycerol, a dimer acid or a trimer acid.

4. Emulsifier according to claim 1 or 2, characterized in that the organic acid is a fluorine-containing amino acid, a sulfonic acid or a sulfinic acid.

5. An emulsifier according to claim 1 or 2, wherein the alkynol is prepared by reacting sodium alkynide with a ketone carbonyl group.

6. The emulsifier according to claim 1 or 2, wherein the vegetable oil is peanut oil, rapeseed oil, cottonseed oil, coconut oil, palm oil, linseed oil or castor oil.

7. The method for preparing the emulsifier according to any one of claims 1 to 6, comprising the steps of:

(1) mixing organic acid, cetylpyridinium chloride and vegetable oil according to a formula, reacting for 5-10 h at 130-180 ℃ in a nitrogen atmosphere, and standing for 1-2 h;

(2) mixing alkynol, ethylene oxide, a rheology modifier and sodium lauroyl sarcosinate, stirring and mixing the mixture with the product obtained in the step (1), and reacting for 1-3 hours at 100-180 ℃.

8. The method according to claim 7, wherein the reaction temperature in the step (1) is 145 ℃ and the reaction time is 8 hours.

9. The method according to claim 7, wherein the reaction temperature in the step (2) is 125 ℃ and the reaction time is 2 hours.

10. Use of the emulsifier prepared by the method of any one of claims 7 to 9 in the preparation of an oil-based drilling fluid.

Technical Field

The invention belongs to the technical field of chemical industry, and particularly relates to an emulsifier, and a preparation method and application thereof.

Background

In the drilling process, the oil-based emulsion has good thermal stability, lubricity, anti-collapse inhibition property and reservoir protection property, and the performance of the oil-based emulsion is obviously superior to that of water-based drilling fluid. However, in the well completion process, the oil-based drilling fluid has the problems of difficult removal of filter cakes, weak bonding strength between cement and a stratum and difficult treatment of residual oil, drill cuttings and waste mud on the surface of the drill cuttings, so that the performance of the water-based drilling fluid used in the well completion process is obviously superior to that of the oil-based drilling fluid. Therefore, the wettability of drill cuttings, stratum and the like is easy to change during drilling, so that the problems of difficult mud cake removal, low cementing strength during well cementation and the like are caused.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the emulsifier, the preparation method and the application thereof, which can effectively solve the problems of difficult mud cake removal, easy generation of drill cuttings and the like in the existing well drilling.

In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows:

an emulsifier comprises the following components in parts by weight:

5-10 parts of organic acid, 20-30 parts of cetylpyridinium chloride, 10-20 parts of ethylene oxide, 5-10 parts of alkynol, 5-10 parts of vegetable oil, 1-5 parts of a rheology modifier and 1-5 parts of sodium lauroyl sarcosinate.

Further, the paint comprises the following components in parts by weight:

5 parts of organic acid, 26 parts of cetylpyridinium chloride, 10 parts of ethylene oxide, 5 parts of alkynol, 3 parts of vegetable oil, 2 parts of a rheology regulator and 4 parts of sodium lauroyl sarcosinate.

Further, the rheology modifier is glycerol, dimer acid, or trimer acid.

Further, the organic acid is a fluorine-containing amino acid, sulfonic acid or sulfinic acid.

Further, the alkynol is prepared by reacting sodium alkynide and ketone carbonyl.

Further, the vegetable oil is peanut oil, rapeseed oil, cottonseed oil, coconut oil, palm oil, linseed oil or castor oil.

The preparation method of the emulsifier comprises the following steps:

(1) mixing organic acid, cetylpyridinium chloride and vegetable oil according to a formula, reacting for 5-10 h at 130-180 ℃ in a nitrogen atmosphere, and standing for 1-2 h;

(2) mixing alkynol, ethylene oxide, a rheology modifier and sodium lauroyl sarcosinate, stirring and mixing the mixture with the product obtained in the step (1), and reacting for 1-3 hours at 100-180 ℃.

Further, the reaction temperature in the step (1) is 145 ℃, and the reaction time is 8 h.

Further, the reaction temperature in the step (2) is 125 ℃, and the reaction time is 2 h.

The emulsifier prepared by the method is applied to the preparation of the oil-based drilling fluid.

The invention has the beneficial effects that:

1. the emulsifier is prepared by adopting components such as organic acid, cetylpyridinium chloride and the like, wherein the organic acid and the cetylpyridinium chloride are subjected to amidation reaction to generate a comb-shaped arc structure with multiple active nodes, so that the temperature resistance of the prepared emulsifier can be greatly improved, and the cetylpyridinium chloride is used as a tertiary amine surfactant with a long hydrophobic carbon chain and has amino groups.

2. The cetyl pyridine chloride is a tertiary amine surfactant, has a certain sterilization effect and corrosion resistance, is compounded with the alkynol and the sodium lauroyl sarcosine, can effectively improve the corrosion resistance of the prepared emulsifier on drilling equipment, and can also improve the heat resistance of the emulsifier.

3. The alkynol and the ethylene oxide can form a hydroxyethyl ether compound, and the hydroxyethyl ether compound has the characteristics of excellent thickening, emulsifying, water protection and the like, so that the emulsifying performance of the prepared emulsifier is further improved, and the wetting property of the whole prepared emulsifier is improved by matching with the vegetable oil and the rheology modifier, so that the matching of a secondary emulsifier can be reduced or not required when the drilling fluid is prepared.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.