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Anionic supramolecular oil displacement agent as well as preparation method and application thereof

A supramolecular, oil-displacing agent technology, applied in chemical instruments and methods, earth-moving drilling, wellbore/well components, etc., can solve problems such as concentration reduction, polymer viscosity increasing ability and oil-displacing efficiency reduction, etc., to achieve excellent The effect of increasing viscosity, improving macroscopic sweep volume and oil displacement efficiency, excellent temperature resistance, salt resistance and shear resistance

Inactive Publication Date: 2022-01-25
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, after the polymer is injected into the formation, it will be diluted by formation fluid and adsorbed by rock minerals, the concentration of the polymer will be greatly reduced, and the viscosification ability and oil displacement efficiency of the polymer will also be greatly reduced after the concentration of the polymer is reduced.

Method used

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  • Anionic supramolecular oil displacement agent as well as preparation method and application thereof
  • Anionic supramolecular oil displacement agent as well as preparation method and application thereof
  • Anionic supramolecular oil displacement agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation of anionic supramolecular oil displacement agent, the steps are as follows:

[0033] (1) Under normal temperature and pressure, dissolve 0.4g of anionic polymer containing sulfonate groups in 200g of water, and stir at room temperature at a speed of 500rpm for 2-3 hours to ensure that the polymer is fully dissolved and mixed evenly, and configured as an anion polymer mother liquor;

[0034] (2) Get 20 mL of anionic polymer mother liquor, add 0.12 mL of ethylenediamine solution to the anionic polymer mother liquor, so that the mass concentration of ethylenediamine is 0.55 wt %, stir for 4-6 hours, and stir at room temperature at a speed of 500 rpm After 5 hours, ensure that the ethylenediamine is fully dissolved and mixed evenly. After standing still for 2 hours, a SPAM / EDA supramolecular oil displacement agent is obtained.

Embodiment 2

[0036] With the preparation of the anion supramolecular oil displacement agent described in embodiment 1, difference is:

[0037] The amount of ethylenediamine solution added was 0.14 mL, and a SPAM / EDA type supramolecular oil displacement agent with an organic amine content of 0.65 wt % was prepared.

Embodiment 3

[0039] With the preparation of the anionic supramolecular oil displacement agent described in Example 1, the difference is that the amount of ethylenediamine added is 0.17mL, and it is configured as a SPAM / EDA type supramolecular oil displacement agent with an organic amine content of 0.75wt%. .

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Abstract

The invention relates to an anionic supramolecular oil-displacing agent as well as a preparation method and application thereof. The anionic supramolecular oil-displacing agent takes a polymer SPAM containing sulfonate radicals as a construction unit. The composite supramolecular system is formed through the electrostatic attraction effect and hydrogen bonds between organic amine, and the interior of the obtained composite system has a more stable network structure. Meanwhile, the viscosity at high temperature and high salinity is increased by virtue of a sulfonic acid group of the polymer SPAM containing sulfonate radicals; besides, the oil-water mobility ratio is reduced, the macroscopic swept volume and the recovery efficiency are improved, and the method has a good application prospect in the field of tertiary oil recovery.

Description

technical field [0001] The invention relates to an anionic supramolecular oil displacement agent and its preparation method and application, belonging to the technical field of tertiary oil recovery. Background technique [0002] Petroleum is an important energy and chemical raw material, and has the reputation of "industrial blood". However, with the increasing demand for oil and the end of primary and secondary oil recovery in conventional oilfields, tertiary oil recovery has become an effective way to alleviate this dilemma in order to maintain the balance of oil production and sales in my country and increase oil production. [0003] At present, my country's enhanced oil recovery mainly relies on chemical flooding, of which polymer flooding accounts for a relatively high proportion. Partially hydrolyzed polyacrylamide with high relative molecular weight is widely used as polymer flooding in tertiary oil recovery. However, HPAM has poor temperature and salt resistance, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/588E21B43/22
CPCC09K8/588E21B43/16
Inventor 谭业邦张帅吴瑞英
Owner SHANDONG UNIV
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