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Medium-phase microemulsion as well as preparation process and application thereof

A technology of microemulsion and additives, which is applied in the field of mesophase microemulsion and its preparation process and application, can solve the problems that the influence of microemulsion oil recovery rate needs to be improved, and achieve enhanced oil recovery rate and enhanced oil recovery rate , high economic benefits

Active Publication Date: 2021-11-02
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the microemulsion that this invention prepares has room for improvement for the impact of oil recovery

Method used

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  • Medium-phase microemulsion as well as preparation process and application thereof
  • Medium-phase microemulsion as well as preparation process and application thereof
  • Medium-phase microemulsion as well as preparation process and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A kind of medium phase microemulsion, according to percentage by weight, comprises following components: 0.35% sodium dodecylbenzobicyclohexane sulfonate, 0.2% sodium dodecyl alcohol polyoxyethylene polyoxypropylene sulfonate (N= 20, M=20), 0.03% polyoxyethylene sorbitan fatty acid ester (CAS: 9005-66-7, Jiangsu Haian Petrochemical Plant), 0.001% glutaraldehyde and oil recovery reinjection water (remainder).

[0042] The preparation process of the medium-phase microemulsion comprises the following steps: adding glutaraldehyde to the oil recovery reinjection water, adding sodium dodecylbenzobicyclohexane sulfonate, sodium dodecyl polyoxypropylene sulfonate and polyoxygen Ethylene sorbitan fatty acid ester, mixed evenly, ready.

Embodiment 2

[0044] In addition to replacing sodium dodecylbenzobicyclohexanesulfonate with sodium tetradecylbenzobicyclohexanesulfonate (60%), sodium tetradecylacenaphthylsulfonate (30%), tetradecane Except the mixture of sodium biphenyl sulfonate (10%), keep the gross mass of main agent constant, all the other are identical with embodiment 1.

Embodiment 3

[0046]Except sodium lauryl alcohol polyoxyethylene polyoxypropylene sulfonate (N=20, M=20) is replaced by fatty alcohol polyoxyethylene polyoxypropylene sodium sulfonate, wherein n=12, N=15, M=12, All the other are identical with embodiment 1.

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Abstract

The invention relates to the technical field of oil field tertiary oil recovery, in particular to a medium-phase microemulsion and a preparation process and application thereof, and the medium-phase microemulsion comprises the following components: a main agent, fatty alcohol polyoxyethylene polyoxypropylene sodium sulfonate, an auxiliary agent and water, the main agent comprises at least one of sodium alkyl benzo dicyclohexylsulfonate, sodium alkyl acenaphthene sulfonate, sodium alkyl biphenyl sulfonate, sodium alkyl fluorene sulfonate and sodium alkyl indane sulfonate, the medium-phase microemulsion is used for oil displacement, the crude oil recovery rate can be greatly increased, and meanwhile the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of oilfield tertiary oil recovery, in particular to a mesophase microemulsion and its preparation process and application. Background technique [0002] It is usually called primary oil recovery to exploit the energy of the oil layer; injecting water and gas into the oil layer to supplement energy to the oil layer to extract oil is called secondary oil recovery; and using chemical substances to improve the performance of oil, gas, water and rocks. , to extract more oil, known as tertiary oil recovery, also known as enhanced oil recovery (EOR) method. There are many methods to enhance oil recovery, the main methods are as follows: injection of surfactant; injection of polymer thickened water; injection of alkali water flooding; injection of CO 2 flooding; alkali plus polymer flooding; inert gas flooding; hydrocarbon miscible flooding; burning oil layers; steam flooding, etc. [0003] At present, the oil dis...

Claims

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Application Information

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IPC IPC(8): C09K8/584C09K8/60
CPCC09K8/584C09K8/604
Inventor 关丹白雷栾和鑫阙庭丽陈权生赵敏代学成云庆庆邵洪志
Owner PETROCHINA CO LTD
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