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Viscosity reducing and drag reducing agent for high viscosity well

A drag reducing agent, oil well technology, applied in drilling equipment and other directions, can solve the problems of low oil production rate, difficult wellbore lifting, high viscosity of heavy oil, and achieve the advantages of increasing oil and gas production, significant economic and social benefits, and prolonging pump life. Effect

Inactive Publication Date: 2003-11-26
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high viscosity of heavy oil, the seepage ability in the oil layer is poor, and the wellbore lift is also very difficult, which will inevitably lead to low oil production rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0023] C7 aromatics: 50%

[0024] Oil-soluble water-dispersed polyether demulsifier BH-01: 15%

[0025] Lignin-modified amphoteric polymer surfactant: 10%

[0026] Nonylphenol polyoxyethylene (15) ether: 5%

[0027] Higher alcohol acrylate: 5%

[0028] Sorbitan monooleate polyoxyethylene ether: 15%.

example 2

[0030] C8 aromatics: 60%

[0031] Oil-soluble water-dispersed polyether demulsifier BH-09: 20%

[0032] Lignin-modified amphoteric polymer surfactant: 8%

[0033] Octylphenol polyoxyethylene (10) ether: 4%

[0034] Sodium acrylate and sodium ethylene sulfonate copolymer: 4%

[0035] Sorbitan monostearate polyoxyethylene ether: 4%.

example 3

[0037] Carbon 10 aromatics: 80%

[0038] Oil-soluble water-dispersed polyether demulsifier BH-04: 10%

[0039] Lignin-modified amphoteric polymer surfactant: 5%

[0040] Octylphenol polyoxyethylene (10) ether: 1%

[0041] Higher alcohol acrylate: 1%

[0042] Phibitan trioleate polyoxyethylene ether: 3%.

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PUM

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Abstract

The viscosity reducing and drag reducing agent for high viscosity well consists of C7-C10 aromatic hydrocarbon organic solvent, oil soluble water dispersed polyether demulsifier, lignin modified amphoteric polymer surfactant, reverse dispersion stabilizing regulator, carbon chain linear polymer as drag reducing agent and synergis in certain proportion. The viscosity reducing and drag reducing agent is injected into wall make high viscosity water-in-oil thick oil become oil-in-water emulsion for extraction. Oil as the dispersed phase in continuous water phase results in greatly lowered visocisty of the thick oil and facilitates the oil extraction. The present invention is simple in field application, has applicable raw oil viscosity range of 100-1000 mPa.s and pH 6-8, no corrosion to pipe column and no environment pollution.

Description

technical field [0001] The invention relates to a drag reducer, in particular to a viscosity reducer and drag reducer for heavy oil wells. Background technique [0002] The exploitation of heavy oil reservoirs is a worldwide problem. Due to the high viscosity of heavy oil, the seepage ability in the oil layer is poor, and the wellbore lifting is also very difficult, which will inevitably lead to low oil production rate. The research and application of oil well viscosity reduction technology in heavy oil areas is of great significance for improving the development effect of heavy oil blocks and further producing heavy oil resources. Contents of the invention [0003] We have developed a heavy oil well viscosity and drag reducer for heavy oil reservoirs. The invention can improve pump efficiency and pump life, reduce production costs, and increase oil and gas production. It is of great significance for the de...

Claims

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Application Information

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Inventor 赵秀娟易飞李成见刘文辉何瑞兵
Owner CHINA NAT OFFSHORE OIL CORP
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