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 non-flammability, safety hazards, and low flash point of water-soluble drag-reducing agents, and reduce production costs , increase output, prolong the effect of pump life

Active Publication Date: 2008-02-13
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 red

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0037] Example 1: Water-soluble drag reducer for heavy oil wells in weight ratio of raw materials: 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: Four raw materials including fatty acid polyoxyethylene (9) ester, polyoxypropylene polyoxyethylene propylene glycol ether, polyether polyol type SAA, FC-N01 fluorocarbon surfactant, etc. are added into the atmospheric pressure enamel reactor in proportion. Slowly increase the temperature to 90°C. Add water under constant stirring. After stirring for 30 minutes, stop heating. 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 Zhao 61-5 are five wells in series. Zhao 61-8 enter...

Example Embodiment

[0042] Example 2: The weight ratio 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 meets the normal production of oil wells when the dosage is 180mg / l in the daily maintenance of Ze 70 heavy oil reservoirs. The effect comparison is as follows:

[0046] Item

Example Embodiment

[0047] Example 3: The weight ratio of the 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 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

[0051] Well X-10 has not been able to produce normally since it was put into production. After adding a water-soluble drag reducer to a heavy oil well, when the dosage is 200mg / l, the well is producing normally. The hot wash cycle was extended from 10 days to 213 days. It can be seen from the field application data in the X-10 well in the table that during a dosing cycle, the current of the oil well decreases, the maximum load decreases, and t...

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PUM

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Abstract

The invention discloses a water-soluble friction-reducing additive for thick-oil wells, applied to thick-oil wells (with water content over 25 percent) for paraffin removal and viscosity reduction. The raw materials include (calculated by weight percent) A. fatty-acid polyoxyethylene (9) ester 2-10 percent; B. polyoxypropene polyoxy propylene propylene glycol ether 10-30 percent; C. polyether glycol SAA 5-15 percent; D. FC-N01 fluorocarbon surfactant 0.01-0.07 percent; E. water (the remainder). If the water-soluble friction-reducing additive is applied to thick-oil wells with water content over 25 percent, the paraffin is removed and the viscosity is reduced in the oil-well, the production cost is lowered and the output is increased. In addition, the water-soluble friction-reducing additive is also applicable to cold production and cold transportation of thick-oil well with medium/high water content. The water-soluble friction-reducing additive is inflammable, and capable to overcome the disadvantages of existing oil-well friction-reducing additives, such as 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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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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