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Environment-friendly tertiary oil recovery oil-displacing agent based on biosurfactant

A technology of co-surfactant and biological surface, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of high production raw material cost, poor degradation performance, waste of resources, etc., and achieve consumption saving and oil displacement efficiency The effect of increasing and reducing the cost of raw materials

Active Publication Date: 2015-03-11
合肥全景泰益新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of using these newly developed surfactants as raw materials for the production of oil displacement agents is high, and the degradation performance after crude oil demulsification is poor, causing pollution
[0003] Tea meal is the residue cake left after tea oil is extracted from tea oil seeds, and more than 1 million tons of tea meal are produced every year, because these tea leaves cannot be effectively and reasonably processed, resulting in a huge waste of resources

Method used

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  • Environment-friendly tertiary oil recovery oil-displacing agent based on biosurfactant
  • Environment-friendly tertiary oil recovery oil-displacing agent based on biosurfactant
  • Environment-friendly tertiary oil recovery oil-displacing agent based on biosurfactant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Take by weighing the subtilisin sodium of 0.6 weight part, the alkylbenzene sulfonate of 35 weight parts, the amide type betaine of 8 weight parts and the tea saponin modifying agent of 2 weight parts add in the reactor and mix, then Add 1.2 parts by weight of co-surfactant and 65 parts by weight of water and stir until uniform to prepare an oil displacing agent.

[0033] The oil displacement agent prepared above was added to the groundwater and crude oil mixture that simulated the oil production conditions of a block in Karamay Oilfield, Xinjiang, and the interfacial tension between crude oil / formation water and the recovery rate were measured. The mass concentration of the oil displacement agent was measured to be 0.0462 g / L, the interfacial tension between crude oil / formation water is 1.32×10 -3 mN / m, the oil recovery rate is 16.3%, and the oil displacement agent separated by demulsification in crude oil recovery can be degraded.

Embodiment 2

[0035] Take by weighing 0.8 parts by weight of subtilisin sodium, 30 parts by weight of alkylbenzene sulfonate, 10 parts by weight of amido betaine and 1.6 parts by weight of tea saponin modifier and add in the reactor and mix evenly, then Add 1.4 parts by weight of co-surfactant and 57 parts by weight of water and stir until uniform to prepare an oil displacing agent.

[0036] The oil displacement agent prepared above was added to the groundwater and crude oil mixture that simulated the oil production conditions of a block in Karamay Oilfield, Xinjiang, and the interfacial tension between crude oil / formation water and the recovery rate were measured. The mass concentration of the oil displacement agent was measured to be 0.0358 At g / L, the interfacial tension between crude oil / formation water is 1.75×10 -3 mN / m, the oil recovery rate is 15.4%, and the oil displacement agent demulsified and separated in crude oil recovery can be degraded.

Embodiment 3

[0038] Take by weighing 1.0 parts by weight of lipopeptide sodium, 25 parts by weight of alkylbenzene sulfonate, 12 parts by weight of amido betaine and 1.5 parts by weight of tea saponin modifier and add in the reactor and mix evenly, then Add 1.5 parts by weight of co-surfactant and 50 parts by weight of water and stir until uniform to prepare an oil displacing agent.

[0039] The oil displacement agent prepared above was added to the groundwater and crude oil mixture that simulated the oil production conditions of a block in Karamay Oilfield, Xinjiang, and the interfacial tension between crude oil / formation water and the recovery rate were measured. The mass concentration of the oil displacement agent was measured to be 0.028 At g / L, the interfacial tension between crude oil / formation water is 1.9×10 -3 mN / m, the oil recovery rate is 14.8%, and the oil displacement agent for oil recovery and demulsification separation can be degraded and environmentally friendly.

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Abstract

The invention discloses an environment-friendly tertiary oil recovery oil-displacing agent based on a biosurfactant. The environment-friendly tertiary oil recovery oil-displacing agent is prepared from the following ingredients in parts by weight: 0.6-1.0 part of sodium bacillus subtilis lipopeptide, 25-35 parts of alkylbenzene sulfonate, 8-12 parts of betaine amide, 1.5-2 parts of a tea saponin modifier, 1.2-1.5 parts of a cosurfactant, and 50-65 parts of water, wherein sodium bacillus subtilis lipopeptide, the tea saponin modifier, alkylbenzene sulfonate and betaine amide are mutually blended to prepare the tertiary oil recovery oil-displacing agent. The tertiary oil recovery oil-displacing agent can be used for exploiting a high-water-content, low-permeability, oil-thickened, high-temperature and high-salt oil deposit, so as to improve the oil displacement efficiency and the sweep efficiency, and increase the recovery efficiency up to about 15%; after demulsification of the crude oil, due to the properties of sodium bacillus subtilis lipopeptide and tea saponin, the separated oil-displacing agent is excellent in degradability, so as to avoid secondary pollution due to the condition that the separated oil-displacing agent cannot be degraded, and then achieve the environment protecting effect.

Description

technical field [0001] The invention relates to the field of petroleum exploitation, in particular to an environment-friendly tertiary oil recovery oil displacement agent based on biosurfactant. Background technique [0002] With the continuous exploitation of oil, most of my country's oil fields have entered the period of high water cut, low permeability, heavy oil, high temperature and high salt production, and the remaining oil reservoirs are distributed in highly heterogeneous carbonate rock fractures and caves, which are difficult to exploit. The place. Therefore, in the existing tertiary oil recovery technology, various newly developed surfactants are generally used as oil displacement agents. By compounding with polymers, etc., the oil displacement efficiency and sweep coefficient are improved, and the recovery factor is increased. However, the cost of using these newly developed surfactants as raw materials for the production of oil displacement agents is high, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 朱仁发邵国泉侯嫒瑛李佳明章翠凤袁号
Owner 合肥全景泰益新材料科技有限公司
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