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Viscosity reducer for heavy oil, preparation method thereof and method for viscosity reduction of heavy oil

A heavy oil viscosity reducer and heavy oil technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of difficult control of influencing factors and low viscosity reduction efficiency

Active Publication Date: 2018-05-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to overcome the defects that existing chemical heavy oil viscosity reduction technology has low viscosity reduction efficiency and many factors affecting implementation are difficult to control, and provide a heavy oil viscosity reduction agent and its preparation method and heavy oil viscosity reduction method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] This example is used to illustrate the heavy oil viscosity reducing agent and the heavy oil viscosity reducing method of the present invention.

[0049] (1) The dimethyl sulfate of 0.12g, the sodium hydroxide aqueous solution (25% by weight) of 0.6g and the dichloromethane of 0.28g are uniformly mixed and stirred to obtain the thick oil viscosity reducer of 1.0g;

[0050] (2) Mix 50g of Tahewai heavy oil (with a viscosity of 935.5mPa·s at 50°C) and 1.0g of the heavy oil viscosity reducer obtained in (1) at 50°C, and then stand it at 50°C for reaction 48h;

[0051] (3) The viscosity of the mixture obtained in (2) at 50° C. was measured by HAAKE VT550 to be 466 mPa·s, and the calculated viscosity reduction rate was 50.2%.

Embodiment 2

[0053] This example is used to illustrate the heavy oil viscosity reducing agent and the heavy oil viscosity reducing method of the present invention.

[0054] (1) The toluene of the methyl p-toluenesulfonate of 0.1g, the tetrabutylammonium hydroxide aqueous solution (25% by weight) of 0.4g and the toluene of 0.3g are uniformly mixed and stirred to obtain the heavy oil viscosity reducer of 0.8g;

[0055] (2) Mix 50g of Tahewai heavy oil (viscosity of 600.8mPa·s at 60°C) with 0.8g of the heavy oil viscosity reducer obtained in (1) at 60°C, and then stand at 60°C for reaction 72h;

[0056] (3) The viscosity of the mixture obtained in (2) at 60° C. was measured by HAAKE VT550 to be 208.3 mPa·s, and the calculated viscosity reduction rate was 65.3%.

Embodiment 3

[0058] This example is used to illustrate the heavy oil viscosity reducing agent and the heavy oil viscosity reducing method of the present invention.

[0059] (1) The dimethyl carbonate of 0.09g, the tetrabutylammonium hydroxide aqueous solution (25% by weight) of 0.36g and the THF of 0.42g are uniformly mixed and stirred to obtain the heavy oil viscosity reducer of 0.87g;

[0060] (2) Mix 50g of Tahewai heavy oil (60°C viscosity: 600.8mPa·s) with 0.87g of heavy oil viscosity reducer obtained in (1) at 60°C, and then let it stand at 60°C for reaction 96h;

[0061] (3) The viscosity of the mixture obtained in (2) at 60° C. was measured by HAAKE VT550 to be 375.5 mPa·s, and the calculated viscosity reduction rate was 37.5%.

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Abstract

The invention discloses a thick oil viscosity reducer, a preparing method thereof and a thick oil viscosity reducing method. The total weight of the thick oil viscosity reducer serves as a benchmark, a component A accounts for 3-30% weight of the thick oil viscosity reducer, a component B accounts for 5-40% weight of the thick oil viscosity reducer, and a solvent accounts for 30-92% weight of the thick oil viscosity reducer. The component A is at least one of halogenate methane, p-toluenesulfonic acid methyl ester, dimethyl sulfate, methyl trifluoromethansulfonate and dimethyl carbonate. The component B is at least one of sodium hydroxide, potassium hydroxide, ammonia water, R1NOH and R2NX, wherein R1 and R2 are independently C1-C4 alkyl groups, and X is F or Cl or Br or I. The higher viscosity reducing efficiency can be achieved when the thick oil viscosity reducer is used for reducing the viscosity of the crude oil.

Description

technical field [0001] The invention relates to a heavy oil viscosity reducer, a preparation method thereof and a heavy oil viscosity reducer method. Background technique [0002] In recent years, due to the rising international crude oil prices and the continuous reduction of thin oil resources, countries have begun to pay more attention to the exploitation of heavy oil. At present, the development of heavy oil has extended to the marginal heavy oil and bitumen reservoirs that were thought to have no exploitation value in the past. Due to the high viscosity of heavy oil in the oil layer, large flow resistance, or even immobility, it is difficult to economically and effectively exploit conventional technology. China's onshore heavy oil and bitumen resources account for about 20% of the total petroleum resources, with a predicted resource volume of 19.8 billion tons, of which 7.95 billion tons can be proven geological resources and 1.91 billion tons of recoverable resources....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/58
Inventor 刘必心李本高龙军
Owner CHINA PETROLEUM & CHEM CORP
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