Water soluble friction reducer used for thick oil well and preparation method thereof

A water-soluble and drag-reducing agent technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of safety hazards, non-flammability of water-soluble drag-reducing agents, low flash point, etc., to increase production, The effect of reducing production costs and prolonging pump life
CN100537699CActive Publication Date: 2009-09-09PETROCHINA CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
PETROCHINA CO LTD
Publication Date
2009-09-09

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Abstract

Water-soluble drag reducer for heavy oil wells, used for wax removal and viscosity reduction in heavy oil wells with water content greater than 25%. The characteristics are: the weight ratio of raw material components is: A, fatty acid polyoxyethylene (9) ester: 2-10%; B, polyoxypropylene polyoxyethylene propylene glycol ether: 10-30%; C, polyether polyol type SAA : 5-15%; D, FC-N01 fluorocarbon surfactant: 0.01-0.07%; E, the rest is water. The effect is: the application of water-soluble drag reducer on heavy oil wells with water content greater than 25% can meet the requirements of wax removal and viscosity reduction of oil wells, improve pump efficiency and extend pump life, reduce production costs and increase production. At the same time, it is also suitable for cold production and cold transportation of heavy oil wells with medium and high water cuts. The water-soluble drag reducer for oil wells of the invention is nonflammable, breaking the long-standing deficiency that the drag reducer for oil wells is oil-soluble and flammable.
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Description

technical field

[0001] The invention relates to the technical field of oilfield chemistry, in particular to a water-soluble drag reducer for heavy oil wells, a formulation of the water-soluble drag reducer for wax removal and viscosity reduction in heavy oil wells with a water content greater than 25%, and a preparation method thereof. Background technique

[0002] Exploitation of heavy oil reservoirs is a technical problem. Heavy oil has high viscosity, poor seepage capacity in oil layers, and poor fluidity in wellbore lifting, which are the main reasons for difficult oil recovery. It is of great significance to carry out the research and application of oil well viscosity reduction technology in heavy oil areas, improve the development status of heavy oil blocks, and further tap heavy oil resources.

[0003] At present, in the production of heavy oil wells, most of them adopt chemical viscosity reduction measures. Although the viscosity reducer used has a good viscosity r...

Claims

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