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Organic cross linking system for polymer flooding and preparation method of cross linking agent

A cross-linking system and organic technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of transition metal human body and environmental damage, inability to meet environmental protection requirements, easy-to-break glue shrinkage, etc. and strength controllable, good synergistic stabilization effect, good thermal stability effect

Active Publication Date: 2012-06-20
扬州润达油田化学剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The use of transition metal cross-linked polymer system is an effective means to enhance oil recovery. It has the advantages of strong adaptability and can be applied to a wide range of temperature and pH conditions. The gelation time and viscosity are easy to control and can exist stably for 45 days. Above, but after high temperature aging, it is easy to break and shrink; and the transition metal will cause harm to the human body and the environment. With the strengthening of environmental protection awareness in the international and domestic circles, the transition metal cross-linked polymer flooding system has gradually failed to meet environmental protection requirements; Organic resin crosslinking agent has good thermal stability, but slow gelation

Method used

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  • Organic cross linking system for polymer flooding and preparation method of cross linking agent
  • Organic cross linking system for polymer flooding and preparation method of cross linking agent
  • Organic cross linking system for polymer flooding and preparation method of cross linking agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] In the 2m equipped with stirrer, thermometer and heating mantle 3 In a stainless steel reaction kettle, add 250kg phenol, 35kg sodium hydroxide and 30kg urotropine, raise the temperature to 50°C, react at a constant temperature for 30 minutes, add 500kg glutaraldehyde, raise the temperature to 60°C, react at a constant temperature for 50 minutes, then add 15kg of sodium hydroxide , 200kg of aluminum citrate and 100kg of aluminum sulfate, heated up to 70°C, and reacted at a constant temperature for 20 minutes, and finally added 250kg of glutaraldehyde, raised the temperature to 90°C, and reacted at a constant temperature for 30 minutes. After the material is cooled, the material is discharged to obtain the product. The detailed formula is shown in Table 1, formula number RD-841.

Embodiment 2

[0017] In the 2m equipped with stirrer, thermometer and heating mantle 3 In a stainless steel reaction kettle, add 300kg phenol and 35kg sodium hydroxide, raise the temperature to 50°C, react at a constant temperature for 30 minutes, add 500kg glutaraldehyde and 20kg resorcinol, raise the temperature to 60°C, react at a constant temperature for 50 minutes, then add 15kg of sodium hydroxide 150kg of aluminum citrate and 150kg of aluminum sulfate, heated up to 70°C, and reacted at a constant temperature for 20 minutes, and finally added 200kg of glutaraldehyde, raised the temperature to 90°C, and reacted at a constant temperature for 30 minutes. After the material is cooled, the material is discharged to obtain the product. The detailed formula is shown in Table 1, formula number RD-842.

[0018] Table I

[0019]

[0020] Table II

[0021]

[0022] Table three

[0023]

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Abstract

The invention relates to an organic cross linking polymer flooding system for improving the oil recovery ratio. The organic cross linking polymer flooding system is prepared by the following steps of: adding phenol, part of sodium hydroxide and urotropine into a reaction kettle, warming to the temperature of 50 DEG C and performing the reaction for 30min; adding part of glutaraldehyde and resorcinol, warming to the temperature of 60 DEG C and performing the reaction for 50min; adding the rest of sodium hydroxide, aluminium citrate and aluminum sulfate, warming to the temperature of 70 DEG C and performing the reaction for 20min; and finally, adding the rest of glutaraldehyde, warming to the temperature of 90 DEG C, performing the reaction for 30min and emptying after materials are cooled to obtain the product. The invention establishes the organic cross linking polymer flooding system which has controllable gelling time and strength, good thermal stability and good temperature resistance and salt resistance and is harmless to the environment.

Description

technical field [0001] The invention relates to an organic cross-linked polymer oil displacement system for enhancing oil recovery. Background technique [0002] With the continuous exploitation of oil reservoirs, most of the early-developed oil fields have entered the high water cut period. In order to effectively enhance oil recovery, domestic oilfield chemists have conducted many studies in recent years. A large number of laboratory and field tests have shown that the polymer flooding technology can effectively seal the formation and reduce the water produced by the production well. The chemical flooding of this method can maximize the swept volume and improve the oil displacement efficiency. However, due to the fact that the polymer has problems such as poor temperature resistance and salt resistance, easy high-temperature hydrolysis, and easy oxidative degradation during actual use. Therefore, it is necessary to modify the polymer or add a crosslinking agent to make ...

Claims

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Application Information

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IPC IPC(8): C08J3/24C08L61/06C08L61/34C08K5/098C08K3/30C08G8/04C08G14/073C09K8/588
Inventor 檀竹兵
Owner 扬州润达油田化学剂有限公司
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