Anion worm-shaped micellar flooding system and preparation method thereof

A technology of worm-like micelles and systems, applied in the field of anionic worm-like micelles flooding system and its preparation, to achieve the effects of low price, overcoming chromatographic separation problems, and simple composition

Inactive Publication Date: 2008-05-21
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no public report on the use of anionic worm-like micelles as an oil displacement system

Method used

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  • Anion worm-shaped micellar flooding system and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: NaOA / Na 2 CO 3 the solution

[0027]1. Preparation of worm-like micellar oil displacement system: Weigh 0.91g of sodium oleate into a 50ml volumetric flask, add 25ml of secondary deionized water, and heat the volumetric flask in a thermostat at 70°C until the oleic acid Dissolve all the sodium; then add 2.12 g of sodium carbonate to the sodium oleate solution, and dilute to the mark with secondary deionized water. And the volumetric flask was placed in a 70°C incubator to continue heating, and the volumetric flask was taken out and oscillated every half an hour. After the sodium carbonate was completely dissolved and the solution was clarified, the volumetric flask could be taken out of the incubator to obtain Vermicular micelles; that is, the worm-like micelles oil flooding system of the following 2(1) formula.

[0028] The amount of sodium oleate was changed respectively, and the following 2 (2), 2 (3) formulations of worm-like micellar oil flooding syst...

Embodiment 2

[0043] Example 2: NaOA / Na 3 PO 4 the solution

[0044] 1. Preparation of worm-like micellar oil displacement system: Weigh 0.91g of sodium oleate into a 50ml volumetric flask, add 25ml of secondary deionized water, and heat the volumetric flask in a thermostat at 70°C until the oleic acid After all the sodium is dissolved, add 3.28 g of Na to the sodium oleate solution 3 PO 4 , dilute to the mark with secondary deionized water, and place the volumetric flask in a 70°C incubator to continue heating. Take out the volumetric flask and tilt it every half hour until the sodium phosphate is completely dissolved and the solution is clarified. The volumetric flask was taken out from the incubator, and the worm-like micelles were obtained; that is, the worm-like micelles oil flooding system of the following 2 (1) formula.

[0045] The amount of sodium oleate was changed respectively, and the worm-like micellar oil flooding system of the following 2 (2) formula was prepared accordin...

Embodiment 3

[0055] Embodiment 3: to NaOA / NaOH / NaCl solution

[0056] 1. Preparation of worm-like micellar oil displacement system: Weigh 0.91g of sodium oleate into a 50ml volumetric flask, add 25ml of secondary deionized water, and heat the volumetric flask in a thermostat at 70°C until the oil After the sodium oleate is completely dissolved, add 0.02g NaOH and 1.17g NaCl to the sodium oleate solution, and the solution needs to be placed at a temperature greater than 20°C.

[0057] 2. Indoor simulated oil displacement experiment:

[0058] Formula: 0.060M NaOA+0.10M NaOH+0.40M NaCl

[0059] Basic data of oil displacement simulation core tube: (experimental temperature 60°C)

[0060] Air permeability: 2.10μm 2 ; Pore volume (PV): 34.50cm 3 ; Saturated oil volume: 27.02cm 3

[0061] Experimental results: water flooding recovery: 68.50% OOIP; chemical flooding recovery: 34.20% OOIP

[0062] It can be seen from the experimental data of the above specific examples that the recovery fact...

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Abstract

The invention relates to a worm-like micelle and a preparation method thereof, belonging to the application technical field of surfactants. The worm-like micelles of the present invention have a length of 100nm to 800nm ​​and a network structure, and are prepared by inducing sodium oleate with an electrolyte containing sodium ions at a temperature of 12 to 65°C under alkaline conditions; the electrolyte containing sodium ions is selected from One or a combination of: Na2CO3, Na3PO4, NaOH and NaCl. The worm-like micelles of the present invention are used as an oil displacement system in tertiary oil recovery, and its recovery rate is 18% to 35%. Although the oil displacement system does not contain polymers, it can not only improve the oil washing efficiency, but also improve the Sweep coefficient, for which high oil displacement efficiency is obtained.

Description

technical field [0001] The technology relates to an anionic worm-like micellar oil displacement system and a preparation method thereof, and belongs to the application technical field of surfactants. Background technique [0002] As an important strategic material, oil is called the "blood" of industry and plays an important role in social development. The exploitation of oil can be divided into three stages: the first stage refers to the self-spraying of crude oil by the pressure of the formation, which is called primary oil recovery, and the recovery rate is about 15%; The formation pressure is maintained by water well injection, which is called secondary oil recovery, and the recovery rate is about 15-20%. After water flooding, the residual oil in the formation still accounts for 60-70%, which needs to be driven out by physical and chemical methods, which is called tertiary oil recovery. oil recovery. [0003] According to the survey of 82 water injection development zo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584
Inventor 郑利强纪永强于丽李干佐曹泉
Owner SHANDONG UNIV
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