Molecular compound surfactant and preparation method thereof

A technology of surfactants and polymer modifiers, which is applied in the field of molecular composite surfactants and their preparation, can solve the problems of destroying the structure of oil reservoirs, reducing the viscoelasticity of polymers, and increasing the amount of polymers used, so as to improve Effects of recovery factor, reduction of interfacial tension, and increase of hydrodynamic volume

Inactive Publication Date: 2009-12-09
GUNGHO CHARGE TIANJIN REFINED PETROLEUM TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Alkali/polymer/surfactant ASP flooding system can greatly improve oil recovery, but there are also some problems in the process of large-scale industrial application: 1. The use of alkali will cause multivalent ion precipitation, Rock minerals are dissolved, thereby destroying the oil layer and oil well structure, seriously damaging the formation, and the pump barrel needs to be cleaned every 10-15 days, which increa

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A molecular composite surfactant, its constituents and weight are respectively:

[0034] Surfactant system

[0035] Petroleum Sulfonate Surfactant 30.0g

[0036] Sodium dodecylbenzenesulfonate 15.0g

[0037] Isooctylphenol Ethoxylate 10.0g

[0038] Methylcellulose M20 5.0g

[0039] Polyoxyethylene Oleate 1.0g

[0040] Non-ionic-phosphate salt type viscosity reducer 2.0g

[0041] Isopropanol 2.0g

[0042] Add water to 100g.

[0043] A preparation method of molecular composite surfactant is: 30.0 g of petroleum sulfonate surfactant, 15.0 g of sodium dodecylbenzene sulfonate, 10.0 g of isooctyl phenolic polyoxyethylene ether, methyl cellulose Add 5.0g of M20, 1.0g of polyoxyethylene oleate, 2.0g of non-ionic-phosphate salt-type viscosity reducer, 2.0g of isopropanol and up to 100g of water into a mixer equipped with a stirring device, and stir at room temperature for 2h. That is, the finished molecular composite surfactant is obtained.

[0044] Determination of oi...

Embodiment 2

[0050] A molecular composite surfactant, its constituents and weight are respectively:

[0051] Surfactant system

[0052] Petroleum Sulfonate Surfactant 40.0g

[0053] Fatty alcohol polyoxyethylene ether 10.0g

[0054] Betaine 4.0g

[0055] Polyvinylpyrrolidone 4.5g

[0056] Reductive gum 3.0g

[0057] Hexamethylenedimine 3.0g

[0058] Non-ionic-sulfate type viscosity reducer 3.0g

[0059] n-Butanol 2.0g

[0060]Add water to 100g.

[0061] A preparation method of molecular composite surfactant is: 40g of petroleum sulfonate surfactant, 10g of fatty alcohol polyoxyethylene ether, 4.0g of betaine, 4.5g of polyvinylpyrrolidone, 3.0g of reducing gum, hexamethylene Add 3.0 g of imine, 3.0 g of non-ionic-sulfate type viscosity reducer, 2.0 g of n-butanol and water up to 100 g into a mixer equipped with a stirring device, and stir at room temperature for 2 h.

[0062] Determination of oil-water interfacial tension system:

[0063] Surfactant dosage 0.1% concentration

[0...

Embodiment 3

[0068] A molecular composite surfactant, its constituents and weight are respectively:

[0069] Surfactant system

[0070] Petroleum Sulfonate Surfactant 40.0g

[0071] Sodium polystyrene sulfonate 5.5g

[0072] Reductive gum 1.0g

[0073] Sodium dodecyl sulfonate 5.0g

[0074] Betaine 6.0g

[0075] Laurylaminoethers Phosphate 4.0g

[0076] n-propanol 3.0g

[0077] Add water to 100g.

[0078] A preparation method of molecular composite surfactant is: 40g of petroleum sulfonate surfactant, 5.5g of sodium polystyrene sulfonate, 1.0g of reducing gum, 5.0g of sodium dodecylsulfonate, 6.0g of betaine , 4.0 g of laurylamino polyoxyethylene ether phosphate, 3.0 g of n-propanol and 100 g of clear water were added to a mixer equipped with a stirring device, and stirred at room temperature for 2 hours.

[0079] Determination of oil-water interfacial tension system:

[0080] Surfactant dosage 0.1% concentration

[0081] Polyacrylamide and clean water (or reinjected sewage) 1200...

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Abstract

The invention relates to a molecular compound surfactant and a preparation method thereof. The molecular compound surfactant respectively comprises the following components and weight percent thereof: 20 to 40 of petroleum sulfonate surfactant, 6 to 30 of surfactant, 5 to 10 of high molecular modifier, 1 to 5 of viscosity reducer, 1 to 5 of additive and water added to 100. The preparation method comprises the following steps that: the petroleum sulfonate surfactant, the surfactant, the high molecular modifier, the viscosity reducer, the additive and the water are added into a reactor with a stirring device according to the weight ratio and are stirred at room temperature for 1.5 to 2.5 hours so as to obtain a finished product. The compound surfactant is prepared by utilizing a plurality of associations of structure complementary and good compatibility as well as the mechanism of intermolecular interaction of the surfactant of a plurality of association and active components with complemental structure and well matching, and the system has the properties of high-temperature resistance, salt resistance, high-viscosity resistance, ultra-low interfacial tension and the like, conforms to the requirement of environmental protection and can obviously enhance the recovery ratio of crude oil after being used for the oil displacement of tertiary oil recovery.

Description

technical field [0001] The invention relates to three oil recovery enhanced oil recovery, in particular to a molecular compound surfactant and a preparation method thereof for enhancing oil recovery. Background technique [0002] After the primary and secondary extraction of underground crude oil, more than 40% of the crude oil remains in the formation; if the formation conditions are not ideal, even 80% of the crude oil remains in the formation after the primary and secondary extraction. At present, my country's major oil fields have entered a period of high water cut, and underground crude oil is in a discontinuous state of dispersion. The oil displacement technology mainly uses the synergistic effect of alkali, polymer and surfactant to achieve the effect of increasing oil and reducing water, and improving oil recovery. [0003] Alkali / polymer / surfactant ASP flooding system can greatly improve oil recovery, but there are also some problems in the process of large-scale in...

Claims

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Application Information

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IPC IPC(8): B01F17/08B01F17/12B01F17/10B01F17/28B01F17/22B01F17/14C09K23/08C09K23/10C09K23/12C09K23/14C09K23/22C09K23/28
Inventor 杨印海
Owner GUNGHO CHARGE TIANJIN REFINED PETROLEUM TECH DEV
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