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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

Active Publication Date: 2009-09-09
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obtain water-soluble drag reducing agent for heavy oil wells, which has the effect of heavy oil drag reduction, and use the non-flammability of water-soluble drag reducing agent to overcome the shortcomings of low flash point and potential safety hazards of wax-removing and viscosity-reducing agents commonly used in heavy oil wells

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: The weight ratio of raw material components of water-soluble drag reducer for heavy oil wells is: fatty acid polyoxyethylene (9) ester: 6%; polyoxypropylene polyoxyethylene propylene glycol ether: 28%; FC-N01 fluorocarbon surfactant : 0.05%; polyether polyol type SAA: 7%; water: 58.95%.

[0038] Preparation process: Add fatty acid polyoxyethylene (9) ester, polyoxypropylene polyoxyethylene propylene glycol ether, polyether polyol type SAA, FC-N01 fluorocarbon surfactant and other four raw materials into the normal pressure enamel reaction kettle in proportion. Slowly raise the temperature to 90°C. Water was added with constant stirring, and after stirring was continued for 30 minutes, the heating was stopped. Stir while cooling, and cool to room temperature. After stirring for 25 minutes, the material is discharged to obtain a water-soluble drag reducer for heavy oil wells.

[0039] Evaluation:

[0040] Zhao 61-3, Zhao 61-6, Zhao 61-9, Zhao 61-2, and Z...

Embodiment 2

[0042] Embodiment 2: The weight ratio of the raw material components of the water-soluble drag reducer for heavy oil wells is: fatty acid polyoxyethylene (9) ester: 6%; polyoxypropylene polyoxyethylene propylene glycol ether: 28%; FC-N01 fluorocarbon surfactant : 0.05%; polyether polyol type SAA: 7%; water: 58.95%.

[0043] The preparation process is the same as in Example 1.

[0044] Evaluation:

[0045] The water-soluble drag reducer for heavy oil wells is used in the daily maintenance of oil wells in Ze 70 heavy oil reservoirs. When the dosage is 180mg / l, it meets the normal production of oil wells. The effect comparison is as follows:

[0046]

Embodiment 3

[0047] Embodiment 3: the weight ratio of raw material components of water-soluble drag reducer for heavy oil wells is: fatty acid polyoxyethylene (9) ester produced by Shanghai Auxiliary Factory Co., Ltd.: 6%; polyoxypropylene produced by Shandong Binhua Group Co., Ltd. Polyoxyethylene propylene glycol ether: 28%; FC-N01 fluorocarbon surfactant: 0.05%; polyether polyol type SAA produced by Jidong Petroleum Exploration and Development Company: 7%; water: 58.95%.

[0048] The preparation process is the same as in Example 1.

[0049] Evaluation:

[0050] hashtag relatively

density Sticky at 50°C

degree mPa.s freeze

point ℃ Wax % Colloid.

Bitten % first round

key component second level

key component X-10 0.9344 3608.0 55 18.9 48.1 36 24.1 X-12 0.9287 1779.5 41 19.7 41.8 35.3 25.0

[0051] Well X-10 has not been able to produce normally since it was put into production. After adding water-soluble drag reducer to...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/52
Inventor 付亚荣蔡远红田炜吴泽美李冬青刘建华蒲祥金陈宝新翟建国孔繁勋陈鲲
Owner PETROCHINA CO LTD
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