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Broad-spectrum wax-proof pour point depressant for crude oil

A technology of wax-preventing pour point depressant and pour point depressant, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of small quantity of crude oil pour point depressant and limited application range, etc., and achieve good economic benefits, reduce Good coagulation effect, suitable for popularization and application

Active Publication Date: 2009-12-16
PANJIN LIAOHE OILFIELD YULONG RUIDA PETROLEUM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the number of crude oil pour point depressants with good practical application effect in the oil field production process is very small, and the scope of application is extremely limited

Method used

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  • Broad-spectrum wax-proof pour point depressant for crude oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: prepare broad-spectrum crude oil anti-wax pour point depressant 5000mg

[0027] The consumption of each raw material is as follows:

[0028] Octadecyl Acrylate 400mg

[0029] Behenyl Methacrylate 1150mg

[0030] Fatty alcohol polyoxyethylene ether 250mg

[0031] Styrene 650mg

[0032] Maleic anhydride 450mg

[0033] 3-Ethyltoluene 2100mg

[0034] The production process is as follows:

[0035] (1) Add the stearyl acrylate, behenyl methacrylate, maleic anhydride and styrene in the above weight ratio into the reaction kettle and heat it to 120°C while stirring, keep the temperature for 4-4.5 hours and leave the kettle , as agent A and put into a special tank for storage;

[0036] (2) Add the fatty alcohol polyoxyethylene ether and 3-ethyltoluene in the above weight ratio into another reaction kettle, heat it to 60-65°C and stir for 1.5-2 hours, and take it out of the kettle as B agent and put it into a special tank middle;

[0037] (3) Pour all the p...

Embodiment 2

[0038] Embodiment 2: Preparation of broad-spectrum crude oil wax control and pour point depressant 5000mg

[0039] The consumption of each raw material is as follows:

[0040] Octadecyl Acrylate 500mg

[0041] Behenyl Methacrylate 900mg

[0042] Fatty alcohol polyoxyethylene ether 400mg

[0043] Styrene 500mg

[0044] Maleic anhydride 500mg

[0045] 3-Ethyltoluene 2200mg

[0046] The production process is as follows:

[0047] (1) Add stearyl acrylate, behenyl methacrylate, maleic anhydride and styrene in the above weight ratio into the reaction kettle and stir evenly, heat to 125°C and keep the temperature for 4 hours, then leave the kettle, as A The agent is stored in a special tank;

[0048] (2) Add the fatty alcohol polyoxyethylene ether and 3-ethyltoluene in the above weight ratio into another reaction kettle, heat it to 60°C and stir for 2 hours, and take it out of the kettle as agent B and pour it into a special tank;

[0049] (3) Pour all the prepared agents A a...

Embodiment 3

[0050] Example 3 Oil field evaluation test of pour point depressant of the present invention

[0051] As shown in Table 1, the crude oil pour point depressant of the present invention is tested in the Jabung Oilfield in Indonesia, and its application range is wide, and its performance in different oil well tests is better than that of foreign similar products or equivalent to foreign similar products.

[0052] Table 1. Evaluation tests of various crude oil pour point depressants in Jabung Oilfield, Indonesia

[0053]

[0054]

[0055] Note: PR-5198 and PR-5199 are crude oil pour point depressants prepared according to Examples 1 and 2, respectively, and MI-7142 and EC-6560A are control reagents, both of which are crude oil pour point depressants produced abroad.

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Abstract

The invention provides a broad-spectrum wax-proof pour point depressant for crude oil. Octadecyl acrylate, methacrylic acid docosane ester, styrene and maleic anhydride are mixed according to certain proportion and then react for 4 to 4.5 hours at a temperature of between 120 and 125 DEG C to form an agent A; 3-ethyl toluene and fatty alcohol-polyoxyethylene ether are mixed according to certain proportion and then react for 2 to 2.5 hours at a temperature of between 60 and 65 DEG C to form an agent B; and the agent A and the agent B are mixed, the temperature of the mixture is kept constant for 1 to 1.5 hours at a temperature of between 80 and 85 DEG C, and then the mixture is permitted to stand for 1.5 to 2 hours to form the pour point depressant. The pour point depressant has wide application range and good pour point depression effect, effectively improves the liquidity of the crude oil, is safe and reliable, has good environmental benefit, and can increase the yield of the crude oil, reduce the times of thermally washing the well and reduce the production cost of oilfields.

Description

technical field [0001] The invention relates to a broad-spectrum crude oil wax-preventing and pour-point depressant for reducing the solidification point and waxing point of crude oil and improving the fluidity of crude oil, which belongs to oilfield chemical additives. Background technique [0002] The research on the mechanism of crude oil pour point depressants at home and abroad was as early as 1962 when Lorensen et al. proposed the adsorption-eutectic theory. In 1965, Holder et al. conducted research on thermodynamics and observed with a cryogenic microscope, clearly pointing out that pour point depressants can change the crystal form of wax to isotropy. In 1966, Mieulet added polyethylene similar to wax crystal structure to crude oil to prevent wax from coagulating, and achieved remarkable results. In 1969, the crude oil pour point depressant was invented. In 1982, Soviet oil experts pointed out that pour point depressants can change the size, shape, and structure of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/588C09K8/584C09K8/524
Inventor 马冬兰于雷于立君
Owner PANJIN LIAOHE OILFIELD YULONG RUIDA PETROLEUM TECH CO LTD
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