Heavy oil viscosity reducer as well as preparation method and application thereof

A heavy oil viscosity reducer and solvent technology, applied in the field of heavy oil viscosity reducer, can solve the problems of difficulty in dissolution, low viscosity reduction rate, failure to meet the requirements of mining and transportation, etc., and achieves improved grafting rate, easy and stable dispersion , the effect of increasing complexity

Inactive Publication Date: 2020-10-02
NINGBO FENGCHENG ADVANCED ENERGY MATERIALS RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also the following disadvantages: First, the oil-soluble viscosity reducer has a strong selectivity, and one or a certain type of viscosity reducer can only be suitable for specific heavy oil. For high waxy heavy oil, the oil-soluble viscosity reducer Generally not suitable; second, the oil-soluble viscosity reducer must be completely dissolved to play a role, which requires a large amount of solvent and is difficult to dissolve when used on site, which limits its effect; third, the viscosity reduction rate is relatively low compared with the physical viscosity reduction method. Applications fall short of mining and delivery requirements

Method used

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  • Heavy oil viscosity reducer as well as preparation method and application thereof
  • Heavy oil viscosity reducer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] The preparation of embodiment 1 sample 1

[0076] Step (1) Add 50ml of absolute ethanol, 1ml of acetic acid, 1ml of distilled water, and 1ml of KH570 (γ-methacryloxypropyltrimethoxysilane) to a 100ml three-necked flask in sequence;

[0077] Step (2) The mixture in step (1) is mechanically stirred at room temperature, hydrolyzed for 2 hours, and the stirring speed is 200r / min;

[0078] Step (3) adds 2.5g nanometer SiO in step (2) 2 , heated to 50°C, and reacted for 3h under vigorous stirring.

[0079] Step (4) The reaction product is centrifuged (rotating speed 4000r / min), and washed several times with absolute ethanol;

[0080] Step (5) Vacuum drying at 30°C for 10 hours to obtain the pre-modified product nano KH570 / SiO 2 ;

[0081] Step (6) Disperse the pre-modified product in step (5) evenly in absolute ethanol, add a certain amount of stearyl methacrylate (SMA) and acrylamide (AM), mix and dissolve, and heat up to 80°C ;

[0082] Step (7) After passing nitrogen...

Embodiment 2

[0085] The preparation of embodiment 2 sample 2

[0086] Step (1) Add 50ml of absolute ethanol, 1ml of acetic acid, 1ml of distilled water, and 1ml of KH570 (γ-methacryloxypropyltrimethoxysilane) to a 100ml three-necked flask in sequence;

[0087] Step (2) The mixture in step (1) is mechanically stirred at room temperature, hydrolyzed for 2 hours, and the stirring speed is 500r / min;

[0088] Step (3) adds 2.5g nanometer SiO in step (2) 2 , heated to 50°C, and reacted for 3h under vigorous stirring.

[0089] Step (4) The reaction product is centrifuged (rotating speed 4000r / min), and washed several times with absolute ethanol;

[0090] Step (5) Vacuum drying at 30°C for 10 hours to obtain the pre-modified product nano KH570 / SiO 2 ;

[0091] Step (6) Disperse the pre-modified product in step (5) evenly in absolute ethanol, add a certain amount of stearyl methacrylate (SMA) and acrylamide (AM), mix and dissolve, and heat up to 80°C ;

[0092] Step (7) After passing nitrogen...

Embodiment 3

[0095] The preparation of embodiment 3 sample 3

[0096] Other operation is with embodiment 1, difference is that the silane coupling agent that adopts in the step (1) is vinyltriethoxysilane; Obtain final product nanometer PSMA-AM / SiO 2 Viscosity reducer for composite material, denoted as sample 3.

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Abstract

The invention discloses a heavy oil viscosity reducer. The heavy oil viscosity reducer is a composite material of a graft polymer modified by a nano SiO2 silane coupling agent, wherein the polymer isa methacrylic acid long-chain alkyl ester-acrylamide copolymer; the methacrylic acid long-chain alkyl ester-acrylamide copolymer is characterized in that a long-chain alkyl group in the methacrylic acid long-chain alkyl ester is an alkyl group with 10-25 carbon atoms. The heavy oil viscosity reducer utilizes a special surface effect to be used as a nucleation point to adsorb wax to be crystallizedand separated out on the surface, the crystallization behavior of the wax is changed, and the original three-dimensional network structure of wax crystals is destroyed; meanwhile, strong polar groupson the surfaces of the nano particles adsorb colloid and asphaltene through hydrogen bond interaction to form a solvation layer on the surfaces of the nano particles, and due to the solvation layer,wax crystals can be prevented from being connected to form a net-shaped structure, a plane overlapping stacking structure of the colloid and the emerald green matter can be disassembled, and thereforethe viscosity of the thickened oil is greatly reduced.

Description

technical field [0001] The application relates to a heavy oil viscosity reducer, which belongs to the field of petroleum exploitation. Background technique [0002] With the rapid development of world economy and science and technology, the demand for energy in modern society is also increasing day by day. Although the development and utilization of new energy is rising rapidly, there is still a considerable distance from mature application. Therefore, the world's energy supply will be in a very long time. It will still need to be met by fossil energy for a period of time. Among them, petroleum is the most widely used fossil energy, its importance is self-evident, and it is called the "blood" of modern industry. In addition to providing energy for vehicles and power systems, it is also an important chemical raw material that plays an indispensable role in industrial production and daily life. [0003] The ever-increasing demand has resulted in a large number of oil resourc...

Claims

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Application Information

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IPC IPC(8): C09K8/588C09K8/584C08F292/00C08F220/56C08F220/18
CPCC09K8/588C09K8/584C08F292/00C09K2208/10C08F220/56C08F220/1818C08F220/1812
Inventor 徐胜明刘海彦邓全怀陶震赵凤鸣王金剑王耀国
Owner NINGBO FENGCHENG ADVANCED ENERGY MATERIALS RES INST
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