A kind of crude oil viscosity reducer and preparation method thereof

A crude oil viscosity reducer and organic solvent technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as the reduction and disappearance of emulsification ability, and achieve good emulsification and viscosity reduction ability, good viscosity reduction effect, The effect of high salt tolerance

Active Publication Date: 2017-08-25
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used emulsifiers include alkyl carboxylate, petroleum sulfonate, OP, Pingpinga, etc., but with the increase of salt content in water and formation temperature, the emulsifying ability of these emulsifiers decreases or even disappears

Method used

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  • A kind of crude oil viscosity reducer and preparation method thereof
  • A kind of crude oil viscosity reducer and preparation method thereof
  • A kind of crude oil viscosity reducer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Embodiment 1, polymer shown in preparation formula I:

[0063] The end-modified polyamide-amine compound shown in formula I (the number of carbon atoms in the R main chain is 10, x=5, m=10) is prepared according to the following method:

[0064] 1) Preparation of long-chain alkyl 1.0G polyamide-amine (compound shown in formula IV):

[0065] Add 16g of decylamine (0.1mol) and 250g of methanol into a 1000mL three-necked flask, reflux at a constant temperature under magnetic stirring, and the bath temperature is 65°C. After the raw materials are completely dissolved, slowly add 86g (1mol) of methyl acrylate dropwise with a constant pressure dropping funnel , the dropping rate is one drop per second, after 24 hours of reaction under constant temperature (65°C) stirring, a light yellow transparent liquid is obtained. G (generation), add 3.3g (0.01mol) of 0.5G product in the there-necked flask, add 120g of methanol, and at a constant temperature of 60°C, while stirring, slow...

Embodiment 2

[0068] The preparation of the compound shown in embodiment 2, formula II:

[0069] 1) Preparation of 4-hydroxyethoxybenzenesulfonic acid: Dissolve 4.0g (0.1mol) NaOH (under alkaline conditions, the hydroxyl group of p-hydroxybenzenesulfonic acid is converted into an oxyanion to attack the bromine site of bromoethanol) in 100mL In distilled water, cool to room temperature and add to a three-necked flask; add 6.9g (0.05mol) p-hydroxybenzenesulfonic acid, stir and dissolve in the above sodium hydroxide solution, and heat to 80°C in a water bath; add a little KI to the flask, add a little KI The purpose is to catalyze and accelerate the reaction. The reaction is carried out at a temperature of 80°C, the reaction time is 20h, and the reaction has already occurred. The amount of KI added is 5% of that of bromoethanol, and the added KI is essentially a catalyst. First, let I- replace the Br- of bromoethanol, iodine The reactivity of ethanol is higher than that of bromoethanol, which...

Embodiment 3

[0078] Embodiment 3, crude oil viscosity reducer P 1 Preparation of:

[0079] The polymer of formula II-1 obtained in Example 1 and the end-modified 1.0-generation polyamide-amine compound shown in formula I (the number of carbon atoms in the R main chain is 10, x=5, m=10) are respectively prepared into aqueous solutions, Then, mix at a solute mass ratio of 1:1 to prepare a compound system solution of the end-modified 1.0-generation polyamide-amine compound shown in formula I and the polymer shown in formula II, with a total concentration of 2.0 g / L, denoted for P 1 .

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Abstract

The invention discloses a crude oil viscosity reducer and a preparation method thereof. The crude oil viscosity reducer is composed of a polymer shown in formula I and a polymer shown in formula II, wherein the polymer shown in formula I and the polymer shown in formula II The mass ratio of polymer is 1:(1-30), and the total concentration of described crude oil viscosity reducer is 1g / L-5g / L; In described formula I, R main chain carbon number is 6-30 Alkyl; x is an integer of 5-15; m is an integer of 1-20; in the formula II, y is an integer of 2-10; n is an integer of 10-90. The prepared crude oil viscosity reducer still has a good viscosity reduction effect under high temperature and high salt environment, and has good emulsification and viscosity reduction capabilities for crude oil.

Description

technical field [0001] The invention belongs to the technical field of crude oil viscosity reducer, and in particular relates to a crude oil viscosity reducer and a preparation method thereof. Background technique [0002] The key to the development of heavy oil is to reduce the viscosity and improve its fluidity. The emulsification viscosity reduction method is currently a widely used wellbore viscosity reduction technology due to its simple construction and low operating costs. The amphiphilic polymer viscosity reducer used in it is different from the traditional mixed emulsification viscosity reducer, which has the characteristics of difficulty in demulsification and dehydration of the produced heavy oil and large processing capacity. Advantages such as no impact. Commonly used emulsifiers include alkyl carboxylate, petroleum sulfonate, OP, Pingpinga, etc., but with the increase of salt content in water and formation temperature, the emulsifying ability of these emulsif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L87/00C08G83/00C08L33/14C08F120/38C09K8/588
Inventor 杨光张健康晓东赵娟崔盈贤朱玥珺薛新生赵文森
Owner CHINA NAT OFFSHORE OIL CORP
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