Salt- and temperature-resistant emulsification viscosity reducer for heavy oil

A technology of emulsification, viscosity reduction and temperature resistance, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., and can solve problems such as high back pressure of surface pipelines, difficulties in safe production of heavy oil wells, and low content of straight-chain hydrocarbons

Active Publication Date: 2012-08-01
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The content of light components in heavy oil is low, the content of asphaltenes and colloids is high, and the content of straight chain hydrocarbons is low, resulting in most heavy oils having high viscosity and high density characteristics, so pumping units are prone to occur during heavy oil production. Problems s

Method used

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  • Salt- and temperature-resistant emulsification viscosity reducer for heavy oil
  • Salt- and temperature-resistant emulsification viscosity reducer for heavy oil
  • Salt- and temperature-resistant emulsification viscosity reducer for heavy oil

Examples

Experimental program
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Effect test

Embodiment 1

[0086] Embodiment 1: salt-resistant and temperature-resistant viscous oil emulsifying viscosity reducer, parts by mass of each component:

[0087]

[0088]

[0089] (1) Sodium dodecylbenzenesulfonate, disodium monolauryl sulfosuccinate and disodium nonylphenol polyoxyethylene ether sulfosuccinate monoester are prepared into an aqueous solution at 20°C under normal pressure stirring conditions, Slowly add lauryl alcohol polyoxyethylene (3) ether sodium sulfate, nonylphenol polyoxyethylene polyoxypropylene ether, methyl glucoside sesquistearate polyoxyethylene (20) ether, lauric acid monoethanolamide polyoxyethylene (3) ether and tetraethylenepentamine polyoxyethylene polyoxypropylene ether to obtain an aqueous solution of the main agent.

[0090] (2) Spray 2-acrylamide-2-methylpropanesulfonic acid, nonionic fluorocarbon surfactant FN-2 and modified nano-auxiliary ZnO (10nm) on the water surface at 20°C under normal pressure stirring conditions After continuous stirring f...

Embodiment 2

[0094] Embodiment 2: Anti-salt and temperature-resistant viscous oil emulsifying agent, parts by mass of each component:

[0095]

[0096] (1) Prepare sodium lignosulfonate, disodium monolauryl sulfosuccinate and disodium nonylphenol polyoxyethylene ether sulfosuccinate monoester into an aqueous solution at 50°C with normal pressure stirring, then slowly add Alkylphenol polyoxyethylene (10) ether sodium sulfate, nonylphenol polyoxyethylene (7) polyoxypropylene (2) ether, methyl glucoside polyoxyethylene (10) ether, polyoxyethylene stearamide and polyoxyethylene stearamide Ethylene polyamine polyoxypropylene polyoxyethylene ether to obtain the aqueous solution of the main agent.

[0097] (2) Spray sulfomethylated polyacrylamide, non-ionic fluorocarbon surfactant FN-3, and modified nano-auxiliary ZnO (200nm) on the water surface under normal pressure stirring conditions at 50°C, continue stirring for 30 minutes and slowly Add polyethylene glycol to obtain an aqueous solution...

Embodiment 3

[0101] Embodiment 3: salt-resistant and temperature-resistant viscous oil emulsifying viscosity reducer, parts by mass of each component:

[0102]

[0103] (1) Prepare sodium dodecyl diphenyl ether disulfonate, disodium monolauryl sulfosuccinate and disodium nonylphenol polyoxyethylene ether sulfosuccinate monoester at 60°C under normal pressure stirring conditions into an aqueous solution, and then slowly add nonylphenol polyoxyethylene ether sodium sulfate, nonylphenol polyoxyethylene polyoxypropylene ether, methyl glucoside polyoxyethylene (20) ether, polyoxyethylene lauric acid diethanolamide and polyethylene Polyamine polyoxyethylene polyoxypropylene ether to obtain the aqueous solution of the main agent.

[0104] (2) Spray polyacrylamide sulfonate copolymer, non-ionic fluorocarbon surfactant FN-3 and modified nano-auxiliary CaO (100nm) on the water surface under normal pressure stirring conditions at 60°C, and continue stirring for 60min Then slowly add ethylene glyc...

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Abstract

The invention relates to a salt- and temperature-resistant emulsification viscosity reducer for thick oil. The emulsification viscosity reducer is applied in oil fields for emulsification viscosity reduction of heavy oil and super heavy oil and is characterized by comprising the following components by mass: 1 to 5 parts of sulfonate anionic surfactant, 0.2 to 1 part of disodium monolauryl sulfosuccinate, 0.2 to 1 part of polyoxyethylene nonylphenyl ether disodium monoester sulfosuccinate, 0.7 to 2 parts of polyoxyethylene ether ester salt, 1 to 3 parts of polyoxyethylene nonylphenyl-polyoxypropylene alcohol ether block copolymer, 0.5 to 1 part of carboxymethyl polyoxyethylene ether, 0.5 to 1 part of organic amide polyoxyethylene ether, 0.7 to 2 parts of polyoxyethylene polyoxypropylene polyethylene polyamine, 0.5 to 1 part of sulfonate polyacrylamide, 0.1 to 0.7 part of nonionic fluorocarbon surfactant, 0.2 to 0.5 part of a modification nanometer auxiliary agent, 0.3 to 1 part of an alkalescence auxiliary agent and 10 to 200 parts of water. The beneficial effects of the emulsification viscosity reducer are as follows: salt resistance is up to 24*10<4> mg/L, resistance to a temperature as high as 150 DEG C is realized, and emulsification viscosity reduction of super heavy oil with a viscosity of 500 Pa.s at a temperature of 50 DEG C is realized.

Description

technical field [0001] The invention relates to the technical field of oil recovery in oilfields, in particular to a viscosity-reducing treatment agent for crude oil, which is a salt-resistant and temperature-resistant super-heavy oil emulsification viscosity-reducer. Background technique [0002] Heavy oil is an important part of the world's petroleum resources. my country is rich in heavy oil reserves. The proven oil reserves are about 5 billion tons, of which 1.4 billion tons are heavy oil, accounting for nearly 30% of the total oil reserves. It is the fourth largest in the world after the United States, Canada and Venezuela. heavy oil producing countries. With the deepening of oil resources development and the reduction of world oil reserves, the exploitation and utilization technology of heavy oil has been paid more and more attention. [0003] The content of light components in heavy oil is low, the content of asphaltenes and colloids is high, and the content of strai...

Claims

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Application Information

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IPC IPC(8): C09K8/584C09K8/588
Inventor 沈建新马桂霞杨之照孙玉国张新礼
Owner PETROCHINA CO LTD
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