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Crude oil composite type emulsification viscosity reducing agent and preparation method thereof

An emulsifying viscosity-reducing and composite technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of non-ionic emulsifiers that are not resistant to high temperature, cannot be used, and the salt resistance is not high enough, so as to solve the problem of crude oil The effect of the viscosity reduction problem

Active Publication Date: 2008-02-13
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of crude oil extraction in oil fields, emulsifying viscosity reducers are often used, but anionic surfactants are used alone, and the salt resistance is not high enough; nonionic emulsifiers are not resistant to high temperatures and have poor stability, so they cannot be used above the cloud point.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1: the prescription and the production technology of composite type emulsified viscosity reducer are: at first, with 79.42% water, 1.0% polyoxyethylene cocoate (5) ester, 5.5% petroleum naphthenic acid monoethanolamide sulfo Five raw materials of succinic acid monoester disodium salt, 9.5% AE07 and 0.08% FC-3B fluorocarbon surfactant were added in proportion to the enamel reaction kettle. Slowly raise the temperature to 55°C. Under constant stirring, 2.0% sodium bicarbonate, 1.5% sodium carbonate, and 1.0% sodium hydroxide were added in proportion from the reactor under vacuum conditions, and after stirring for 30 minutes, stop heating. Stir while cooling, and cool to room temperature. A composite emulsifying viscosity reducer is obtained.

Embodiment 2

[0046] Embodiment 2: the formula and the production technology of composite type emulsified viscosity reducer are: at first, with 85.05% water, 0.7% polyoxyethylene cocoate (5) ester, 3.8% petroleum naphthenic acid monoethanolamide sulfo Five raw materials of succinic acid monoester disodium salt, 6.2% AE07 and 0.06% FC-3B fluorocarbon surfactant were added in proportion to the enamel reaction kettle. Slowly raise the temperature to 62°C. Under constant stirring, 1.3% sodium bicarbonate, 1.26% sodium carbonate, and 0.73% sodium hydroxide were added in proportion from the reaction kettle under vacuum conditions, and after stirring for 30 minutes, stop heating. Stir while cooling, and cool to room temperature. A composite emulsifying viscosity reducer is obtained.

Embodiment 3

[0047] Embodiment 3: the prescription and the production technology of composite type emulsified viscosity reducer are: at first, the polyoxyethylene cocoate (5) ester that 73.73% water, 1.35% Shanghai Auxiliary Factory Co., Ltd. produce, 7.1% Xinjiang Petroleum naphthenic acid monoethanolamide sulfosuccinic acid monoester disodium salt, 12.3% AE07 and 0.07% FC-3B fluorocarbon surfactant produced by Petroleum Administration Bureau Exploration and Development Research Institute are added in proportion to the enamel reaction kettle. Slowly raise the temperature to 65°C. Under constant stirring, 2.7% sodium bicarbonate, 1.6% sodium carbonate, and 1.15% sodium hydroxide were added in proportion from the reactor under vacuum conditions, and after stirring for 30 minutes, stop heating. Stir while cooling, and cool to room temperature. A composite emulsifying viscosity reducer is obtained.

[0048] Viscosity reduction rate evaluation:

[0049] Use a rotary viscometer to measure t...

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PUM

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Abstract

The invention relates to a raw oil composite emulsification viscosity reducing agent, applied to maintenance of oil wells in oil-fields. The raw materials include (calculated by weight percent) A. oleate polyoxyethylene (5) ester: 0.5 to 1.5 percent; B. petroleum cyclocarboxylic alkanolamide sulfate 3 to 8 percent; C. fatty alcohol-polyoxyethylene ether 5 to 15 percent; D. sodium hydroxide 0.5 to 1.5 percent; E. soda 1.0 to 2.0 percent; F. sodium bicarbonate 1.5 to 3; G. FC-3B fluorocarbon surfactant 0.05% to 0.1 percent; H. water (the remainder). During daily maintenance of an oil well, addition of 100mg / l to 200mg / l of such agent can not only meet the requirement of daily viscosity reducing agent on high-temperature resistance, but also meet the requirement of anti-mineral salt. The invention can well reduce the viscosity of raw oil in oil-wells.

Description

technical field [0001] The invention belongs to the technical field of petroleum industrial chemicals, and in particular relates to a composite emulsifying viscosity reducer prepared by compounding an anion with high temperature resistance and salt resistance used in oil well maintenance and a nonionic surfactant. In the daily maintenance of oil wells, when the dosage is 50mg / l-100mg / l, it can not only meet the high temperature resistance requirements of daily oil well viscosity reducers, but also meet the requirements of anti-mineral salt. Solve the problem of viscosity reduction in daily maintenance of oil wells. Background technique [0002] In the process of crude oil extraction in oil fields, emulsifying viscosity reducers are often used, but anionic surfactants are used alone, and the salt resistance is not high enough; nonionic emulsifiers are not resistant to high temperatures and have poor stability, so they cannot be used above the cloud point. . Contents of the...

Claims

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Application Information

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IPC IPC(8): C09K8/52
Inventor 付亚荣蔡远红田炜吴泽美刘建华李冬青潘传英蒲祥金陈宝新翟建国孔繁勋陈鲲
Owner PETROCHINA CO LTD
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