Clay foam stabilizing complex additive for foam flooding as well as preparation method and application of clay foam stabilizing complex additive

A technology of foam flooding and compounding agent, which is applied in earthwork drilling, chemical instruments and methods, drilling compositions, etc., can solve the problems of low foaming performance, achieve high stability, increase foaming volume, and The effect of increasing thermal performance

Active Publication Date: 2014-04-02
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the shortcomings of low foaming performance in the foam system currently used in the field, the present invention provides a clay foam stabilizing compound agent for foam flooding and its preparation method and application, especially a kind of foaming agent with high foaming ability and stable foaming ability. Multi-phase foam composite agent for clay foam stabilization with foaming ability, preparation method and application in foam control and flooding in oil field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1, the preparation of clay foam stabilizing compound agent for foam flooding:

[0032] Add 1.0g of clay particles and 0.6g of sodium dodecylbenzenesulfonate to 100ml of distilled water in sequence, and stir for 30min with magnetic force to obtain the product. Record the bubble volume V 0 and half-life t 0.5 .

Embodiment 2-10

[0033] Embodiment 2-10, preparation of clay foam stabilizing compound agent for foam flooding:

[0034] As described in Example 1, the difference is that the added amount of clay particles in Examples 2-10 is 2.0g, 3.0g, 4.0g, 5.0g, 6.0g, 7.0g, 8.0g, 9.0g, 10.0g respectively. Record the bubble volume V 0 and half-life t 0.5 .

experiment example 1

[0040] The foaming volume V of embodiment 1-10 record 0 and half-life t 0.5 listed in Table 1,

[0041] Table 1

[0042] number\item

[0043] Example 5

[0044] As can be seen from Table 1, the foam flooding clay foam stabilizing compound agent of embodiment 1-10 is compared with the conventional foam foaming volume V of comparative example 1-5 0 Significantly increased, the half-life t 0.5 Significantly prolonged.

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PUM

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Abstract

The invention relates to a clay foam stabilizing complex additive for foam flooding as well as a preparation method and an application of the clay foam stabilizing complex additive. The clay foam stabilizing complex additive comprises the following raw materials in parts by weight: 0.2-0.9 part of sodium dodecyl benzene sulfonate, 1-10 parts of clay particles and 100 parts of water, wherein the particle sizes of the clay particles range from 25mu m to 100mu m. The hydrophobic clay particles are added into the clay foam stabilizing complex additive for foam flooding, provided by the invention to ensure that the solid particles are attached on the surface of a liquid film and in a liquid film layer to form a rigid compact shell, so that the strength of the foam liquid film is enhanced, the liquid drainage of the liquid film is inhibited, the liquid film is prevented from thinning, and furthermore, the bubbling volume of the foam is increased, and the half-life period of the foam is prolonged.

Description

technical field [0001] The invention relates to a clay foam stabilizing compound agent for foam flooding, a preparation method and application thereof, and belongs to the technical field of oil and gas field development engineering. Background technique [0002] Foam control and flooding, as an effective means of tertiary oil recovery, has been widely used in oil and gas field development. In addition to the characteristics of low friction, low density, and low damage, foam also has selectivity to permeability and oil-water layer. Foam can divert liquid flow through the Jamin effect, and foam control and flooding can not only increase the sweep coefficient, but also improve the oil displacement efficiency. In order to achieve the ideal effect of foam control and flooding, a stable foam with strong foaming ability and long half-life must be obtained. [0003] The foaming performance of the foam is affected by many factors, such as temperature, pressure, crude oil and salini...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/594E21B43/22
CPCC09K8/594E21B43/166
Inventor 李松岩李兆敏杨丽媛李宾飞刘己全
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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