High-temperature foaming agent for thickened oil steam huff and puff and preparation method thereof

A high-temperature foaming agent and steam technology, used in the field of thermal oil recovery, can solve problems such as steam channeling, and achieve the effects of uniform bubble size, prolonged half-life, good high temperature resistance and oxidation resistance

Inactive Publication Date: 2021-01-26
洪益民
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that steam channeling is serious with the prolongation of mining time in the existing heavy oil steam huffing and puffing, the present invention provides a high-temperature foaming agent for heavy oil steam huffing and puffing and its preparation method

Method used

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  • High-temperature foaming agent for thickened oil steam huff and puff and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0018] Step 1: Add Ce(NO 3 ) 3 ·6H 2 O was added to deionized water, stirred for 8 min, and then Ce(NO 3 ) 2 ·6H 2 The O solution was dropped into the sodium alginate solution, and stirred rapidly until the gel was formed; then the gel was dried in a vacuum environment at 33°C for 8 hours, and the sample was transferred to a muffle furnace and heated to a temperature of 630°C after drying Calcined for 3h to obtain honeycomb CeO 2 . where Ce(NO 3 ) 3 ·6H 2 The volume ratio of O solution and sodium alginate solution was 1:5.

[0019] Step 2: Add sodium acrylate and 1-vinyl-2-pyrrolidone into deionized water, and ultrasonicate for 20 minutes to obtain mixed solution A; the CeO prepared in step 1 2 Add deionized water, sonicate for 3 minutes to obtain a mixed solution, then add sodium α-olefin sulfonate to the mixed solution under stirring at room temperature, after the addition is completed, adjust the pH of the system to 7 with NaOH solution and continue stirring for 3...

Embodiment 2

[0022] Step 1: Add Ce(NO 3 ) 3 ·6H 2 O was added to deionized water, stirred for 6 min, and then Ce(NO 3 ) 2 ·6H 2 The O solution was dropped into the sodium alginate solution and stirred rapidly until the gel was formed; then the gel was dried in a vacuum environment at 35°C for 6 hours, and the sample was transferred to a muffle furnace and heated to a temperature of 630°C after drying Calcined for 3h to obtain honeycomb CeO 2 . where Ce(NO 3 ) 3 ·6H 2 The volume ratio of O solution and sodium alginate solution was 1:6.

[0023] Step 2: Add sodium acrylate and 1-vinyl-2-pyrrolidone into deionized water, and sonicate for 24 minutes to obtain mixed solution A; the CeO prepared in step 1 2 Add deionized water, sonicate for 5 minutes to obtain a mixed solution, then add sodium α-olefin sulfonate to the mixed solution under stirring at room temperature, after the addition is completed, adjust the pH of the system to 7 with NaOH solution and continue stirring for 40 minu...

Embodiment 3

[0026] Step 1: Add Ce(NO 3 ) 3 ·6H 2O was added to deionized water, stirred for 7 min, and then Ce(NO 3 ) 2 ·6H 2 The O solution was dropped into the sodium alginate solution, and stirred rapidly until the gel was formed; then the gel was dried in a vacuum environment at 30°C for 6 hours, and the sample was transferred to a muffle furnace and heated to a temperature of 630°C after drying Calcined for 2h to obtain honeycomb CeO 2 . where Ce(NO 3 ) 3 ·6H 2 The volume ratio of O solution and sodium alginate solution was 1:7.

[0027] Step 2: Add sodium acrylate and 1-vinyl-2-pyrrolidone into deionized water, and sonicate for 27 minutes to obtain mixed solution A; the CeO prepared in step 1 2 Add deionized water, sonicate for 4 minutes to obtain a mixed solution, then add sodium α-olefin sulfonate to the mixed solution with stirring at room temperature, after the addition is completed, adjust the pH of the system to 7 with NaOH solution and continue stirring for 30 minut...

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Abstract

The invention belongs to the technical field of thermal oil recovery, and particularly relates to a high-temperature foaming agent for thickened oil steam huff and puff and a preparation method thereof. The preparation method comprises the following steps of preparing CeO2 by taking sodium alginate as a template and Ce(NO3)3.6H2O as a raw material, and then dispersing a product obtained by copolymerization of alpha-olefin sodium sulfonate, sodium acrylate and 1-vinyl-2-pyrrolidone in water by taking ammonium persulfate as an initiator to prepare the high-temperature foaming agent. The high-temperature foaming agent provided by the invention has a good foaming effect at high temperature, and can effectively prevent a steam channeling phenomenon.

Description

technical field [0001] The invention belongs to the technical field of thermal oil recovery, and in particular relates to a high-temperature foaming agent for heavy oil steam stimulation and a preparation method thereof. Background technique [0002] Heavy oil resources are widely distributed in the world, and its geological reserves are extremely rich, far exceeding conventional crude oil reserves, with huge exploitation potential. And with the increasing consumption of crude oil, the exploitation of rich heavy oil has become more and more valued by people. [0003] The development of heavy oil is extremely difficult. Due to its high viscosity and high relative density, the oil flow forms a large resistance, which greatly increases the difficulty of oil field production and increases the cost of oil field production. Rod pumping is the most widely used oil reservoir mining method at present. However, due to the high viscosity and high wax content of heavy oil, it is easy t...

Claims

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Application Information

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IPC IPC(8): C08F292/00C08F220/06C08F226/10
CPCC08F292/00C08F220/06C08F226/10
Inventor 洪益民高海涛
Owner 洪益民
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