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Oil field crude oil pour point depressant and preparing method thereof

A crude oil pour point depressant and oil field technology, which is applied in mechanical equipment, gas/liquid distribution and storage, pipeline systems, etc., can solve the problem of large pour point depressant range, small dosing amount, and unsatisfactory crude oil pour point depressant in offshore oilfields, etc. problem, to achieve the effect of enhanced shear resistance, simple process, and easy control of the reaction process

Active Publication Date: 2016-03-09
中海油(天津)油田化工有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to solve the technical problem that none of the existing pour point depressants can satisfy the technical problem of crude oil pour point depressant in offshore oilfields. It provides an oilfield crude oil pour point depressant and its preparation method. Condensation function, and does not contain chlorine, very suitable for crude oil transportation in offshore oil fields, and has the characteristics of small dosage and large pour point reduction range

Method used

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  • Oil field crude oil pour point depressant and preparing method thereof
  • Oil field crude oil pour point depressant and preparing method thereof
  • Oil field crude oil pour point depressant and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043](1) 296.5g hexadecyl acrylate, 518.2g2-perfluorooctyl ethyl acrylate, and 1222.1g xylene are mixed earlier (wherein the mass ratio of hexadecyl acrylate and perfluorooctyl ethyl acrylate is 1:1), warming up to 60°C, stirring for 1h;

[0044] (2) Then add 52.1g of styrene (the molar ratio of cetyl acrylate to styrene is 2:1), turn on nitrogen protection, heat up to 85°C, and add dropwise toluene containing 3.5g of benzoyl peroxide solution, after reacting for 12 hours, product A was obtained;

[0045] (3) Mix 1% of the poly-alkene by the mass of the product A, 5% of the ethylene-vinyl acetate copolymer by the mass of A with A, and stir evenly to obtain the oil field crude oil pour point depressant.

Embodiment 2

[0047] (1) first mix 268.4g myristyl acrylate, 106g2-perfluorobutyl ethyl acrylate, and 374.4g trimethylbenzene (wherein the substance ratio of myristyl acrylate to perfluorobutyl ethyl acrylate is 3 : 1), be warming up to 50 ℃, stir 1h;

[0048] (2) Then add 104.2g of styrene (the ratio of tetradecyl acrylate to styrene is 1:1), turn on the nitrogen protection, heat up to 60°C, and add 1.2g of azobisisobutyronitrile dropwise. Xylene solution, after reacting for 7 hours, product A was obtained;

[0049] (3) 5% of the poly-alkene of the product A quality, 1% of the acrylate-maleic anhydride copolymer of the A quality and A are mixed, stir evenly and obtain oil field crude oil pour point depressant.

Embodiment 3

[0051] (1) First mix 324.5g of octadecyl acrylate, 83.6g of 2-perfluorohexyl ethyl acrylate, and 705.8g of benzene (wherein the ratio of stearyl acrylate to perfluorohexyl ethyl acrylate is 5:1 ), warming up to 70°C, stirring for 1.5h;

[0052] (2) Add 26.1g of styrene (the ratio of octadecyl acrylate to styrene is 4:1), turn on the nitrogen protection, raise the temperature to 110°C, and drop diesel oil containing 1.4g of benzoyl peroxide solution, after reacting for 10 hours, product A was obtained;

[0053] (3) 2% poly-alkene of product A quality, 4% methacrylate-maleic anhydride copolymer of A quality are mixed with A, stir evenly and obtain oil field crude oil pour point depressant.

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Abstract

The invention belongs to the technical field of oil-gas-water collecting and transporting and discloses an oil field crude oil pour point depressant and a preparing method of the oil field crude oil pour point depressant. The preparing method includes the steps that acrylic ester or metacrylic acid ester is mixed with perfluor carboxylic ester firstly, an organic solvent is added, the temperature rises, and stirring is conducted; then styrene is added, the temperature rises under the nitrogen protection, an organic solvent solution of an initiator is dripped, and a product A is obtained after a reaction; and finally, a-olefin, a polymer B and the product A are mixed and evenly stirred, and the oil field crude oil pour point depressant is obtained. The oil field crude oil pour point depressant has the paraffin prevention pour point depressing function, does not contain chlorine, is very suitable for transporting of crude oil of an offshore oil field and has the characteristics that the dosage is small, and the pour point depressing amplitude is large. The preparing method of the oil field crude oil pour point depressant is simple, a polar group containing fluorine is directly introduced into a molecular chain through a further reaction, the reaction process is easy to control, safe, reliable and environment-friendly, and high general applicability is achieved.

Description

technical field [0001] The invention belongs to the technical field of oil, gas and water gathering and transportation, and in particular relates to a pour point depressant for oilfield crude oil and a preparation method thereof. Background technique [0002] With the reduction of conventional oil resources that are easy to exploit and transport, the development and utilization of unconventional oil resources such as high condensation and high viscosity is very urgent, and has become one of the important energy projects in the 21st century. Most of my country's crude oil is high-waxy oil, which has a high freezing point and high viscosity, which seriously restricts its exploitation, gathering and transportation, and greatly reduces production efficiency. Therefore, enhancing low-temperature fluidity has gradually become an important research direction in the process of crude oil development, gathering and transportation. Among the existing pour point depressing methods, the...

Claims

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Application Information

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IPC IPC(8): F17D1/17C08F220/22C08F220/18C08F212/08
CPCC08F220/18C08F220/1812C08F220/1818C08F220/22F17D1/17C08F212/08
Inventor 张国欣陆原郭海军程艳张颖
Owner 中海油(天津)油田化工有限公司
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