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A high temperature resistant auxiliary steam flooding oil displacement agent for thermal oil recovery and its application

A technology for auxiliary steam and thermal oil recovery, which is used in the field of high temperature resistant auxiliary steam flooding oil displacement agent and surfactant for thermal oil recovery, and achieves the effect of high recovery rate and good oil displacement effect.

Active Publication Date: 2020-10-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, no new type of heavy oil thermal recovery additive with strong adaptability and wide range of functions has been researched and developed to meet industrial requirements

Method used

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  • A high temperature resistant auxiliary steam flooding oil displacement agent for thermal oil recovery and its application
  • A high temperature resistant auxiliary steam flooding oil displacement agent for thermal oil recovery and its application
  • A high temperature resistant auxiliary steam flooding oil displacement agent for thermal oil recovery and its application

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1 A kind of high temperature resistant auxiliary steam flooding oil displacement agent for thermal oil recovery

[0027] Preparation method: mix a mixture of N-methylolacrylamide, dimethylaminoethyl acrylate, and 3-acrylamido-3-methylbutyrate sodium (number ratios are 300,000, 20,000, and 120,000) with complexing agent ethylene glycol The high temperature resistant oil displacement agent can be obtained by performing mixed copolymerization reaction of amine tetraacetic acid di, co-solvent urea, solubilizer sodium lauryl sulfate and redox-azo water-soluble composite initiator.

[0028] The obtained oil displacement agent is composed of structural units of the following formulas (I), (II), and (III);

[0029]

[0030]

[0031] Wherein, M in formula (III) is a sodium ion; the number of structural units in formulas (I), (II) and (III) is 300,000, 20,000 and 120,000.

Embodiment 2

[0032] Embodiment 2 A high temperature resistant auxiliary steam flooding oil displacement agent for thermal oil recovery

[0033] The difference between the preparation method and Example 1 is that the quantity ratios of N-methylolacrylamide, dimethylaminoethyl acrylate and 3-acrylamido-3-methylbutyrate are 100000, 40000 and 80000; other same Embodiment 1;

[0034] The oil displacement agent that obtains is connected by the structural unit of formula (I), (II), (III) and forms (with embodiment 1); Wherein, M is potassium ion in formula (III); Formula (I), (II) , The number of structural units of (Ⅲ) is 100000, 40000 and 80000, and others are the same as in Example 1.

Embodiment 3

[0035] Embodiment 3 A kind of high temperature resistant auxiliary steam flooding oil displacement agent for thermal oil recovery

[0036] The difference between the preparation method and Example 1 is that the quantity ratios of N-methylolacrylamide, dimethylaminoethyl acrylate, and 3-acrylamido-3-methylbutyrate are 500,000, 2,000, and 250,000; Embodiment 1;

[0037] The oil displacement agent that obtains is connected by the structural unit of formula (I), (II), (III) and forms (with embodiment 1); Wherein, M is ammonium ion in formula (III); Formula (I), (II) ), (Ⅲ) the number of structural units is 500000, 2000 and 250000, other with embodiment 1.

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PUM

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Abstract

The invention belongs to the technical field of thermal oil recovery and particularly relates to a high-temperature-resistant auxiliary steam-driven oil-displacing agent for thermal oil recovery and application thereof. The oil-displacing agent is a copolymer comprising a hydroxyl-containing acrylamide derivative unit, an acrylate derivative unit and a carboxylate-containing acrylamide derivativeunit. The oil-displacing agent is injected while the steam is injected into the stratum, so that the rheological property of thick oil can be improved, the oil-water interfacial tension can be reduced, the colloid stability can be enhanced, and the oil-displacing effect is good.

Description

technical field [0001] The invention belongs to the technical field of thermal oil recovery, and specifically relates to a high-temperature-resistant auxiliary steam flooding oil displacement agent for thermal oil recovery and its application, and more specifically to a steam injection that can improve the rheological properties of heavy oil during steam injection into formations , A surfactant that reduces the interfacial tension between oil and water and improves colloidal stability. Background technique [0002] With the increasing shortage of petroleum resources, the resource development of heavy oil and even super heavy oil has entered the stage of actual exploitation and utilization. The main mining methods used today include thinning viscosity reduction, heating viscosity reduction, emulsification viscosity reduction and polymer viscosity reduction. In view of the fact that the heavy oil thermal recovery method is not suitable for some thin layers, deep layers, and h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/588C09K8/592C09K8/88C08F220/58C08F220/34
CPCC08F220/58C09K8/588C09K8/592C09K8/882C08F220/34
Inventor 孙业恒许坚王胜吴光焕邓宏伟孙宝泉唐亮于春磊贾丽华张民张礼臻王曦刘妍卿
Owner CHINA PETROLEUM & CHEM CORP
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