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Compound pour point-depressing viscosity reducer for high pour-point crude oil and preparation method thereof

A viscosity reducer and composite technology, applied in chemical instruments and methods, mechanical equipment, drilling compositions, etc., can solve the problems of large pour point reduction range, high freezing point, difficult transportation, etc. The effect of high viscosity reduction rate and prolonged wax cleaning cycle

Inactive Publication Date: 2016-04-13
克拉玛依新科澳石油天然气技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a composite pour point and viscosity reducer for the development of high pour point crude oil and its preparation method. The prepared composite pour point and viscosity dropper has a large pour point drop range, a high viscosity drop rate, and strong chemical permeability. Features, can well solve the problems of high freezing point, high viscosity and difficult transportation of oil produced from oil wells

Method used

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  • Compound pour point-depressing viscosity reducer for high pour-point crude oil and preparation method thereof

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preparation example Construction

[0022] In the present invention, the specific steps of the preparation method include:

[0023] 1) Dissolve EVA and xylene at a mass ratio of 1:4 at room temperature, or dissolve EVA and diesel at a ratio of 1:4 at 60°C;

[0024] 2) Mix and react the product of the first step with dodecylbenzenesulfonic acid according to the mass ratio of 200:1 to prepare modified EVA. Among them, the product of dissolving EVA in xylene reacts at room temperature, and the product of dissolving EVA in diesel oil React at 60°C;

[0025] 3) React triethanolamine and dodecylbenzenesulfonic acid at a ratio of 4:6 at a temperature of 40°C to prepare dodecylbenzenesulfonic acid triethanolamine salt, dodecylbenzenesulfonic acid and triethanolamine compound;

[0026] 4) Add polyether BCH-1130% and lignin amphoteric surfactant to 50% of dodecylbenzenesulfonic acid triethanolamine salt, dodecylbenzenesulfonic acid and triethanolamine compound prepared in 3) 10% and polyether TEF323210% were mixed and ...

Embodiment 1

[0034] Add 320g of xylene to a 500mL four-necked bottle with a thermometer and a stirrer, then add 80g of EVA, start the stirrer to stir and dissolve, and drop 1.2g-2g of dodecylbenzenesulfonic acid after it is completely dissolved, and stir evenly. React at room temperature for 24 hours to obtain a light yellow viscous liquid—modified EVA.

[0035] Add 120g of triethanolamine, polyether BCH-1160g, lignin amphoteric surfactant 20g, polyether TEF323220g into a 500mL four-necked bottle with a thermometer, agitator and condenser in sequence, start the agitator, and add twelve Alkylbenzenesulfonic acid 180g, temperature controlled within 40°C, stirred for 4h to obtain a light brown viscous liquid mixed agent.

[0036] Add 120 g of the above-mentioned modified EVA and 280 g of the above-mentioned mixed agent into a 500 mL four-necked bottle equipped with a thermometer and a stirrer, and stir at a constant temperature of 60 ° C for 3 hours to obtain a light brown composite pour poin...

Embodiment 2

[0038] Add 320g of diesel oil into a 500mL four-necked bottle with a thermometer and agitator, add 80g of EVA, start the agitator to stir, raise the temperature to 60°C and wait until it is completely dissolved, add 2g of dodecylbenzenesulfonic acid dropwise, stir evenly, at 60°C After 8 hours of reaction, a yellow viscous liquid—modified EVA was obtained.

[0039] Add 160g of triethanolamine to a 500mL four-neck bottle equipped with a thermometer, agitator and condenser tube, start to add dodecylbenzenesulfonic acid dropwise, and control the dropping speed during the addition of 240g to keep the temperature at 40°C Within 2 hours after the dropwise addition of the reagent, a light yellow translucent viscous liquid—dodecylbenzenesulfonic acid triethanolamine salt, dodecylbenzenesulfonic acid, triethanolamine compound was obtained.

[0040] Add 200g of the above-mentioned modified EVA to a 500mL four-necked bottle with a thermometer and a stirrer, and dodecylbenzenesulfonic aci...

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Abstract

The invention discloses a compound pour point-depressing viscosity reducer for high pour-point crude oil and a preparation method thereof. Through multiple dissolution compounding of xylene, EVA, dodecylbenzene sulfonic acid, triethanolamine, polyether BCH-11, a lignin ampholytic surfactant and polyether TEF3232, the light brown compound pour point-depressing viscosity reducer is obtained. The compound pour point-depressing viscosity reducer has good drug permeability, large magnitude of pour point depression and a high pour point depression rate, realizes ideal paraffin inhibition effects on different water-containing oil wells, produces multiple effects, prolongs a paraffin removal period, has good adaptability, guarantees normal production of an oil well under various working conditions and well solves the problem that the oil well produced oil has a high pour-point and large viscosity and is conveyed difficultly. At an agent use concentration of 100mg / L, before agent addition, crude oil viscosity is 15836mpa. s at a temperature of 18 DEG C and after agent addition, crude oil viscosity is reduced to 120-208mpa. s at a temperature of 18 DEG C.

Description

technical field [0001] The present invention relates to the application of C09K chemical materials in IPC classification or C10M145 / 00 lubricating composition technology characterized by oxygen-containing polymer compounds as additives, belonging to the technical field of preparation of oilfield chemicals, especially the composite type Pour-point and viscosity-lowering agent and preparation method thereof. Background technique [0002] China has found that there are abundant reserves of high pour point and high viscosity crude oil in oil reservoirs, but it is difficult to exploit and transport them. The existence of asphaltene makes this kind of crude oil dense, high freezing point, high viscosity, and difficult to flow, which seriously restricts the exploitation and transportation of heavy oil and crude oil. [0003] The flow of crude oil is related to the freezing point of crude oil and the viscosity of crude oil. Due to the ubiquity of wax in crude oil, as the temperatu...

Claims

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Application Information

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IPC IPC(8): C09K8/584C09K8/588F17D1/17
CPCC09K8/584C09K8/588C09K2208/28F17D1/17
Inventor 窦军苑新红党智龙龚朝国冯桂荣
Owner 克拉玛依新科澳石油天然气技术股份有限公司
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