CN106244126B

CN106244126B - A method of heavy crude thinner is prepared by raw material of aphthenic acids

Info

Publication number: CN106244126B
Application number: CN201610547244.0A
Authority: CN
Inventors: 麻金海; 孔淑玲
Original assignee: Qingdao University
Current assignee: Qingdao University
Priority date: 2016-07-03
Filing date: 2016-07-03
Publication date: 2019-01-25
Anticipated expiration: 2036-07-03
Also published as: CN106244126A

Abstract

The present invention relates to a kind of methods that heavy crude thinner is prepared as raw material using aphthenic acids.Aphthenic acids abundance, by itself and equivalent or excessive N, N- dimethyl -1, amidation process occurs for 3- propane diamine, generate cycloalkanoimide of the end group containing tertiary amine, then cycloalkanoimide of the end group of two molecules containing tertiary amine is reacted with the 1,4-butanediol diglycidyl ether of a molecule again, generates the double type amphiphile, amphiphilic molecule of the ion containing quaternary amine.Such compound has ideal emulsification viscous crude ability.Preparation method simple process and low cost, and provide a kind of new way for preparing heavy crude thinner.

Description

A method of heavy crude thinner is prepared by raw material of aphthenic acids

Technical field

The invention belongs to oilfield oil extraction additive fields, are made more particularly to a kind of by the aphthenic acids extracted in crude oil is raw material The method of standby heavy crude thinner.

Background technique

In recent years, majority oil field in China's comes into the tail period stage, along with being continuously increased for thickened oil recovery amount, Highly dense, high viscous, poor fluidity characteristic brings extreme difficulties to oil extraction and conveying, and the key of heavy oil development be as How to reduce viscosity of crude, improve its mobility etc..Although having various thinners in the prior art, in oilfield production There is still a need for the thinners that at low cost, dosage is small, performance is stable.

Aphthenic acids be isolated from crude oil one kind containing monocycle and bicyclic saturated fatty acid, be a kind of mixing-in fat Acid, molecular weight ranges are between 180-350.Aphthenic acids derives from crude oil, has special affinity with crude oil, using it as two The hydrophobic group of affinity molecule and prepare crude oil emulsifying agent crude oil dispersion viscosity reduction ability it is significant.

For the present invention using source aphthenic acids abundant as raw material, the thinner of preparation can be effectively reduced viscosity of crude, increase Mobility of the viscous crude in oil reservoir.

Summary of the invention

The present invention is using aphthenic acids as raw material, and by itself and equivalent or excessive N, N- dimethyl -1,3- propane diamine reacts Cycloalkanoimide of the end group containing tertiary amine is generated, then cycloalkanoimide of the end group of two molecules containing the tertiary amine Isosorbide-5-Nitrae-with a molecule again Butanediol diglycidyl ether reaction, generates the double type amphiphile, amphiphilic molecule of the ion containing quaternary amine.Such compound has good point It dissipates, emulsification viscous crude ability.Preparation method simple process and low cost.

Specific embodiment

Embodiment 1

(1) by 0.3mol aphthenic acids (taking molecular weight is 350) and 0.3mol N, band is added in N- dimethyl -1,3- propane diamine Have in the reaction vessel of division box, and 0.5g potassium hydroxide is added, after mixing, constant temperature in 160 DEG C of oil baths is placed in, to no moisture When out, about 5 hours, stop heating, is cooled to room temperature stand-by；

(2) above-mentioned reaction product is added in the reaction vessel with agitating device, is passed through nitrogen flooding and uses up sky in reactor Gas, about 15 minutes, is warming up to 105 DEG C, is slowly dropped into 0.15mol 1,4-butanediol diglycidyl ether with dropping funel, instead Answer 4.0h.Obtain transparent buff viscous liquid product.

Embodiment 2

Crude oil sample is Shengli Oil Field 4# dewatered oil, measures it at 60 DEG C with BROOKFILD DV-III+ type rheometer Under viscosity be 73600mPas, product prepared in embodiment 1 is configured to the aqueous solution of different agents concentration, with oil Water quality ratio is 7: 3, and liquid medicine is added into crude oil, stands 48h at 60 DEG C respectively, and measure mixed liquor at 60 DEG C Viscosity.Treated viscosity of crude and viscosity break ratio are as shown in table 1 below, and seen from table 1, the product prepared in embodiment 1 can be with The viscosity of crude oil is reduced significantly, and when drug concentration is greater than 0.3%, viscosity reducing effect is clearly.

Viscosity reducing effect of 1 medicament of embodiment of 1 various concentration of table to Shengli Viscous Crude Oil

Embodiment 3

With Shengli Oil Field 4# dewatered oil (60 DEG C of viscosity is 73600mPas) for experimental subjects, drug concentration is 0.3%, oil-water ratio 7: 3 has investigated the influence under different temperatures to medicament viscosity reducing effect.1 medicament of embodiment is dropped from temperature The influence curve of viscous effect is found out: temperature rises to 60 DEG C from 30 DEG C, and viscosity break ratio is sharply increased with the raising of temperature, but temperature liter When height is to 60 DEG C or more, viscosity break ratio is held essentially constant.

Influence of 2 temperature of table to medicament viscosity reducing effect

Embodiment 4

Using product prepared in embodiment 1, it is configured to the aqueous solution that mass percent is 0.3%.Using with implementation The similar condition of condition described in example 2 handles the crude oil sample 48h of different viscosities with prepared liquid medicine at 60 DEG C, The viscosity of crude oil before and after the processing is measured at 60 DEG C, the results are shown in Table 3.Seen from table 3, thinner of the invention can be effective The viscosity of ground reduction different type crude oil.

Viscosity reducing effect of the table 3 to different crude oils sample

Crude oil sample	Viscosity of crude (mPas)	Viscosity of crude (mPas) after processing	Viscosity break ratio (%)
				1#	98200	1128	98.9
2#	73600	782	98.9
				3#	27114	394	98.5
4#	27040	392	98.6
				5#	22976	357	98.4
6#	5280	110	97.9
				7#	3467	105	97.0

Claims

1. a kind of method for preparing heavy crude thinner as raw material using aphthenic acids, including the following steps:

(1) aphthenic acids and 0.3molN for being 350 by 0.3mol average molecular weight, N- dimethyl -1,3- propane diamine, which is added to have, to be divided In the reaction vessel of water installations, and 0.5g potassium hydroxide is added, after mixing, is placed in constant temperature in 160 DEG C of oil baths, is separated to anhydrous When, it needs 5 hours, stops heating, be cooled to room temperature stand-by；

(2) above-mentioned reaction product is added in the reaction vessel with agitating device, is passed through nitrogen flooding and uses up air in reactor, needed 15 minutes, 105 DEG C are warming up to, 0.15mol 1,4-butanediol diglycidyl ether is slowly dropped into dropping funel, reacts 4.0h, Obtain transparent buff viscous liquid product.