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Displacement agent, preparation method thereof, and application of displacement agent to plugging removal of oil well

A kind of displacement agent, oil well technology, applied in chemical instruments and methods, earthwork drilling, wellbore/well components, etc., can solve the problems of unrealistic, high cost, unsatisfactory plugging effect and so on

Inactive Publication Date: 2012-07-18
XINJIANG HUAYOU TECH SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for complex blockages, especially deep blockages with a pollution radius of more than 1.5m, the effect of removing blockages is still unsatisfactory.
[0005] In recent years, foreign oilfields have begun to use fluorocarbon surfactants to remove plugging and increase production of oil wells. Fluorocarbon surfactants have an ideal effect on removing complex organic scales. Ideal material for organic scale plugging, but due to its high cost, it is unrealistic to use it as the main plugging agent

Method used

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  • Displacement agent, preparation method thereof, and application of displacement agent to plugging removal of oil well
  • Displacement agent, preparation method thereof, and application of displacement agent to plugging removal of oil well
  • Displacement agent, preparation method thereof, and application of displacement agent to plugging removal of oil well

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Effect test

Embodiment 1

[0045] The formulation of the flooding agent of the present invention is: 200 kg of fluorocarbon surfactant stock solution (containing 50 kg of effective substance, namely the mass of fluorocarbon surfactant), 500 kg of ABS, and 9300 kg of water.

[0046] The preparation method of the flooding agent of the present invention is as follows: firstly mix 200kg of fluorocarbon surfactant stock solution and 500kg ABS uniformly, then add it to 9300kg of water, and stir slightly to make all of them dissolve in the water to obtain the flooding agent of the present invention. Agent.

Embodiment 2

[0048] The formula of the flooding agent of the present invention is: 120 kg of fluorocarbon surfactant stock solution (containing 30 kg of effective substance, ie, the mass of the fluorocarbon surfactant), 300 kg of ABS, and 9580 kg of water.

[0049] The preparation method of the flooding agent of the present invention is as follows: firstly mix 120 kg of fluorocarbon surfactant stock solution with 300 kg of ABS, then add it to 9580 kg of water, gently stir to make all of them dissolve in water, and prepare the flooding agent of the present invention. Discharge agent.

Embodiment 3

[0051] The formulation of the flooding agent of the present invention is: 240kg of fluorocarbon surfactant stock solution (containing 60kg of effective substance, namely the mass of fluorocarbon surfactant), 600kg of ABS, and 9160kg of water.

[0052] The preparation method of the flooding agent of the present invention is as follows: firstly mix 240kg of fluorocarbon surfactant stock solution with 600kg ABS, then add it to 9160kg of water, gently stir to make all of them dissolve in water, and prepare the flooding agent of the present invention. Discharge agent.

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Abstract

The invention relates to a displacement agent, in particular to the displacement agent for plugging removal of an oil well. The displacement agent consists of 0.3 to 0.6 mass percent of fluorocarbon surfactant, 3 to 6 mass percent of acrylonitrile butadiene styrene (ABS), and the balance of water. The invention also provides a preparation method for the displacement agent, and the application of the displacement agent to the plugging removal of the oil well. The total effective rate of oil well plugging removal of the displacement agent is 90 percent, 10.6m<3> of liquid is increased to each single well every day, and 30 tons of oil is increased to each oil well every day; and the displacement agent has a good effect of plugging removal of the oil well.

Description

Technical field [0001] The invention relates to a displacing agent, in particular to a displacing agent for deblocking oil wells. Background technique [0002] The mid-to-high water-cut development period is the mid-to-high water-cut development period of the water injection development oil field, and the production of oil wells is on a downward trend. The reasons for the decline in oil production in oil wells are the gradual decrease in recoverable reserves and the decline in formation energy. With the extension of production and the increase in the number of downhole operations, the degree of pollution of oil wells is increasing, and the pollution factors tend to be more complex and diverse. , The pollutants block the oil layer, further reducing the output of the oil well. In summary, pollutants are divided into two categories: inorganic and organic. According to the analysis of pollutants in water injection oilfields, organic pollution is currently on the increase. [0003] O...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524C09K8/584E21B37/06
Inventor 王毓贤朱全厚李江鹏
Owner XINJIANG HUAYOU TECH SERVICE
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