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Temperature-resistant and salt-resistant amphiphilic polymer heavy oil viscosity reducer and preparation method thereof

A technology of amphiphilic polymer and heavy oil viscosity reducer, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of large amount of heavy oil production and low viscosity reduction efficiency, so as to reduce the use concentration, Improve salt resistance performance, process cleaning and pollution-free effect

Active Publication Date: 2019-07-23
北京安德兴石油技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, the viscosity reducing agent needs to be mixed with the heavy oil for a long time under high-speed stirring conditions to produce the viscosity reducing effect. At the same time, it is used in a large amount for the development of heavy oil, and the viscosity reduction efficiency is low at low concentrations.

Method used

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  • Temperature-resistant and salt-resistant amphiphilic polymer heavy oil viscosity reducer and preparation method thereof
  • Temperature-resistant and salt-resistant amphiphilic polymer heavy oil viscosity reducer and preparation method thereof
  • Temperature-resistant and salt-resistant amphiphilic polymer heavy oil viscosity reducer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Heat-resistant and salt-resistant amphiphilic polymer heavy oil viscosity reducer G 1 preparation of

[0028] (1) First, add 1mol 1-vinyl-2-pyrrolidone, 0.5mol acrylamide and 0.05mol methacryloxypropyltrimethoxysilane into a four-necked flask, then add 777.98g dispersant ethyl acetate, Heating while stirring, the heating temperature is 50°C, and the stirring rate is 200rpm. After it is completely dissolved, add 0.5557g of initiator azobisisobutyronitrile, feed nitrogen for 3 minutes, turn off the nitrogen and adjust the heating temperature to 70°C, and adjust the stirring rate To 400rpm, react for 6h, after the reaction is completed, add 0.8892g polymerization inhibitor p-hydroxyanisole, after cooling, a light yellow mixed solution is obtained;

[0029] (2) Remove the dispersant ethyl acetate from the above-mentioned light yellow mixed solution with a rotary evaporator to obtain a yellow viscous liquid, which is then repeatedly washed 4 times with 222.28 g o...

Embodiment 2

[0034] Example 2: Temperature-resistant and salt-resistant amphiphilic polymer heavy oil viscosity reducer G 2 preparation of

[0035] (1) First add 1mol 1-vinyl-2-pyrrolidone, 1.2mol acrylamide and 2.3mol methacryloxypropyltrimethoxysilane into a four-necked flask, then add 1000.26g dispersant ethyl acetate, Heating while stirring, the heating temperature is 55°C, and the stirring rate is 320rpm. After it is completely dissolved, add 2..2228g of initiator azobisisobutyronitrile, feed nitrogen for 5 minutes, turn off the nitrogen and adjust the heating temperature to 76°C, and stir Adjust the speed to 420rpm and react for 10h. After the reaction is completed, add 1.3337g of polymerization inhibitor p-hydroxyanisole, and obtain a light yellow mixed solution after cooling;

[0036] (2) Remove the dispersant ethyl acetate from the above-mentioned light yellow mixed solution with a rotary evaporator to obtain a yellow viscous liquid, which is then repeatedly washed 6 times with 3...

Embodiment 3

[0041] Example 3: Heat-resistant and salt-resistant amphiphilic polymer heavy oil viscosity reducer G 3 preparation of

[0042] (1) First, 1mol 1-vinyl-2-pyrrolidone, 5.2mol acrylamide and 13.6mol methacryloxypropyltrimethoxysilane were added to a four-necked flask, and then 889.12g dispersant ethyl acetate was added, Heating while stirring, the heating temperature is 62°C, and the stirring rate is 450rpm. After it is completely dissolved, add 3.5565g of initiator azobisisobutyronitrile, feed nitrogen for 8 minutes, turn off the nitrogen and adjust the heating temperature to 83°C, and adjust the stirring rate To 550rpm, react for 8h, after the reaction is completed, add 2.7785g polymerization inhibitor p-hydroxyanisole, after cooling, a light yellow mixed solution is obtained;

[0043] (2) Remove the dispersant ethyl acetate from the above-mentioned light yellow mixed solution with a rotary evaporator to obtain a yellow viscous liquid, which is then repeatedly washed 7 times ...

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Abstract

The invention relates to a polymer type viscosity reducer used in a heavy oil recovery process, concretely to a temperature-resistant and salt-resistant amphiphilic polymer heavy oil viscosity reducerand a preparation method thereof. The viscosity reducer is generated by 1-vinyl-2-pyrrolidone, acrylamide and methacryloxypropyltrimethoxysilane under the action of an initiator. A mol ratio of the 1-vinyl-2-pyrrolidone, the acrylamide and the methacryloxypropyltrimethoxysilane is 1:0.05-10:0.05-20, preferably 1:1.2:2.3. The heavy oil viscosity reducer of the invention has good temperature resistance and salt resistance, the temperature resistance is above 220 DEG C, and the mineralization resistance is above 100000 mg / L. The heavy oil viscosity reducer of the invention has the characteristics of good universality, low use concentration and high viscosity reduction rate, and can reduce more than 98% of the viscosity of heavy oil within 1000-10000 mPa.s under the condition that the use concentration is 200 ppm. Therefore, the temperature-resistant and salt-resistant amphiphilic polymer heavy oil viscosity reducer and the preparation method thereof can be widely applied to heavy oil recovery.

Description

technical field [0001] The invention relates to a polymer viscosity reducer used in heavy oil exploitation, in particular to a temperature-resistant and salt-resistant amphiphilic polymer heavy oil viscosity reducer and a preparation method thereof. Background technique [0002] The world's geological reserves of petroleum are about 219.3 billion tons, including nearly 10 billion tons of heavy oil. my country's proven recoverable oil reserves are 6.513 billion tons, of which continental oil is the main source, the resource grade is low, and the proportion of difficult-to-exploitation resources is relatively large, of which heavy oil resources account for 21.1%, low-permeability oil resources account for 22.4%; The vast majority of oil resources are distributed in areas with extremely harsh mining conditions such as sea areas, deserts, swamps and mountains. To develop these resources, the technical requirements are high, the capital investment is large, and the economic benef...

Claims

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Application Information

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IPC IPC(8): C08F226/10C08F220/56C08F230/08C09K8/584
CPCC08F226/10C09K8/584C08F220/56C08F230/08
Inventor 田春来刘达李燕王凯候玉虹骆世通
Owner 北京安德兴石油技术有限公司
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