Low-cost emulsifying agent applied to oil-based drilling fluid and preparation method thereof

An oil-based drilling fluid, low-cost technology, applied in the field of oil drilling fluid, can solve the problems of increasing the difficulty and cost of on-site operation, unfavorable drilling fluid system stability, lower demulsification voltage, etc., and achieves strong industrial operability and convenience. Promotion and application, the effect of high demulsification voltage

CN107987811APending Publication Date: 2018-05-04联技精细材料(珠海)有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-05-04

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Abstract

The invention discloses a low-cost emulsifying agent applied to an oil-based drilling fluid and a preparation method thereof, and belongs to the technical field of petroleum drilling fluids. The low-cost emulsifying agent comprises the following raw materials in percentages by weight: 45% to 70% of oxidized fatty acid, 15% to 40% of malefic tall oil fatty acid, 5% to 30% of oleic acid and 1% to 5%of octadecyl sodium alkyl benzene sulfonate, wherein the total weight percentage of the raw materials is 100%. The preparation method comprises the following steps: mixing oxidized fatty acid, malefic tall oil fatty acid, oleic acid and octadecyl sodium alkyl benzene sulfonate, carrying out a stirring reaction at the temperature of 60 DEG C for 1 to 2 h, and discharging to obtain the low-cost emulsifying agent. The emulsifying agent disclosed by the invention has the advantages of low cost, high emulsion-breaking voltage, low filter loss and the like, a drilling fluid system can be stable, and the emulsifying agent is small in additive amount and convenient and effective to use and is convenient for popularization and application. The preparation method disclosed by the invention is simple in working procedures, simple in steps and convenient in production, and the production cost is greatly reduced.
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Description

technical field

[0001] The invention relates to the technical field of petroleum drilling fluids, in particular to a low-cost emulsifier applied to oil-based drilling fluids and a preparation method thereof. Background technique

[0002] Drilling fluid is a circulating flushing medium used in oil drilling. Drilling fluids are divided into water-based drilling fluids and oil-based drilling fluids based on the main components. The oil-based drilling fluid is a kind of oil (mainly diesel or mineral oil) as a carrier, various chemical treatment agents and The sol-suspended mixing system with water as the dispersed phase, its main components usually include mineral oil, diesel oil, weighting materials, chemical treatment agents and calcium chloride brine, etc. Compared with water-based drilling fluid, oil-based drilling fluid has stronger anti-slump inhibition, lubricity and good reservoir protection performance, especially suitable for strong water-sensitive and high-temperatur...

Examples

preparation example Construction

[0032] like figure 1 Shown, be a kind of preparation method of the low-cost emulsifier that is applied to oil-based drilling fluid of the present invention, it may further comprise the steps:

[0033] A. Preparation of oxidized fatty acid: Add fatty acid into the reaction kettle, heat to 120-130°C while stirring, feed air or oxygen at a gas rate of 1-7L / h, keep warm for 8-12 hours, and keep it warm for 8-12 hours. Measure the acid value of the material for 2 hours until the acid value is <170mgKOH / g; cool the temperature of the material to 60°C, and discharge the material to obtain oxidized fatty acid;

[0034] B. Preparation of maleated tall oil fatty acid: add crude tall oil fatty acid to the reactor, and heat to 130-150°C while stirring; add maleic anhydride to the reactor, and heat rapidly so that the temperature of the reactor rises to 230°C, heat preservation reaction for 4~6h, measure the acid value of the material every 1h during the reaction process, until the acid v...

Embodiment 1

[0040] Embodiment 1: the preparation of low-cost emulsifier

[0041] A low-cost emulsifier applied to oil-based drilling fluid and its preparation method. Based on the total mass of the emulsifier as 100%, the composition of the emulsifier includes: 70% of oxidized fatty acid, 15% of maleated tall oil fatty acid %, oleic acid 13%, sodium octadecylbenzenesulfonate 2%.

[0042] The above-mentioned components are prepared according to the following steps:

[0043] A. Preparation of oxidized fatty acid: to 10m 3 Add 5t of soybean oil oleic acid into the reaction kettle, start stirring, heat with heat transfer oil, and heat the soybean oil oleic acid to 130°C while stirring; feed oxygen through the vent pipe at the bottom of the reaction kettle, keep the gas velocity at 4L / h, and maintain the temperature React for 8 to 12 hours; during the reaction process, take samples every 2 hours to measure the acid value of the material, until the acid value <170mgKOH / g, the reaction is over...

Embodiment 2

[0046] Embodiment 2: the preparation of low-cost emulsifier

[0047] A low-cost emulsifier applied to oil-based drilling fluid. Based on the sum of the mass percentages of the emulsifier being 100%, the composition of the emulsifier includes: 45% oxidized fatty acid, 30% maleated tall oil fatty acid, Animal oleic acid 20%, sodium octadecylbenzene sulfonate 5%.

[0048] In this example, the oxidized fatty acid is a reaction product obtained by reacting tallow oleic acid with air through heating; the maleated tall oil fatty acid is obtained by reacting crude tall oil fatty acid and maleic anhydride in a mass ratio of 3:1 product.

[0049] The preparation method is the same as in Example 1.