Chemical assistant for thermal recovery of thick oil and application thereof

A chemical additive and heavy oil thermal recovery technology, applied in the field of heavy oil and ultra-heavy oil reservoir development, can solve problems such as restricting the production of high-viscosity crude oil, and achieve the effects of reducing viscosity, enhancing recovery, and improving fluidity

Inactive Publication Date: 2013-12-25
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the temperature resistance of these chemical agents is usually lower than 80°C, so the extraction of high-viscosity crude oil is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] specific:

[0028] Component A is a mixture of ammonium bicarbonate, ammonium carbonate and sodium carbonate.

[0029] Component B is a mixture of anionic surfactant sodium alkylbenzene sulfonate and nonionic surfactant alkylaryl polyethoxyethylene sodium sulfonate;

[0030] Component C is n-butanol;

[0031] The molar ratio of heavy oil to chemical additives in an oilfield is 0.5:1. Mix the above component A, component B, component C and water and stir evenly to get the chemical agent for heavy oil heating, wherein the mass percentage of component A is 5%, and the mass percentage of component B The percentage content is 0.5%, the mass percentage content of component C is 1.5%, and the rest is water.

[0032] Example 2

Embodiment 2

[0034] specific:

[0035] Component A is a mixture of sodium bicarbonate and sodium carbonate.

[0036] Component B is a mixture of anionic surfactant sodium lauryl ether sulfate and nonionic surfactant dodecyl trimethylglycine;

[0037] Component C is n-pentanol.

[0038] The molar ratio of heavy oil to chemical additives in an oilfield is 0.5:1. Mix the above component A, component B, component C and water and stir evenly to get the chemical agent for heavy oil heating, wherein the mass fraction of component A is 4%, and the mass percentage of component B is The content is 0.3%, the mass percentage of component C is 1.5%, and the balance is water.

[0039]Example 1-2 Using the steam flooding experimental device to evaluate the prepared thermal recovery chemical additives, take degassed heavy oil in an oil field (reservoir temperature is 50°C) as an example, its viscosity is 19870mPa·s, design 250°C for steam flooding According to the scheme, a constant-rate flooding expe...

Embodiment 1-2

[0040] Example 3

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PUM

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Abstract

The invention discloses a chemical assistant for thermal recovery of thick oil. The chemical assistant is prepared from the following components in percentage by mass: 0.5-10% of alkaline material, 0.05-5% of surfactant, 0.5-10% of alcohol and 75-98.95% of water through mixing and stirring. When the chemical assistant provided by the invention is added under the condition of steam injection in the thermal recovery of thick oil, the viscosity of the thick oil can be greatly reduced, the viscosity reduction rate reaches up to 98%, the fluidity of the thick oil can be improved effectively, and the yield of the thick oil reservoir is improved, and furthermore, the chemical assistant can be widely used in the field of development of thermal recovery thick oil reservoir.

Description

technical field [0001] The invention relates to the field of heavy oil and super heavy oil reservoir development, in particular to a chemical agent for heavy oil and super heavy oil reservoir development. Background technique [0002] The world's oil consumption is increasing year by year, but the recoverable oil reserves are decreasing year by year, especially the reserves of easy-to-recover thin oil are getting less and less, the world's energy crisis is becoming more and more severe, and many countries have raised the issue of oil to the level of national security. Altitude, especially in our country, there is a more realistic and urgent demand for the exploitation of heavy oil. With the increasing difficulty of heavy oil production and thicker oil, ordinary steam huff and puff and steam flooding can no longer meet the needs of heavy oil production. People urgently need a newer and better extraction method to meet the urgent needs of heavy oil extraction. [0003] At pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/592C09K8/584
Inventor 赵法军刘永建赵明国周志军李占东冯进来
Owner NORTHEAST GASOLINEEUM UNIV
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