Glycine betaine surfactant composition system and purpose thereof

A surfactant and betaine technology, applied in chemical flooding, betaine surfactant composition system, and low surfactant concentration field, can solve the negative impact on oil recovery and environment, limited improvement of oil production capacity, and large application restrictions and other issues, to achieve the significance of protecting natural resources, improving oil displacement efficiency, and significant economic benefits

Inactive Publication Date: 2013-12-04
SHANGHAI HAIGUI CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The reason for the decline in secondary oil recovery efficiency is that due to capillary force, the remaining crude oil is intermittently bound in the pores of the rock sand in the reservoir layer, which prevents the crude oil from flowing freely with the injection water system
The traditional three-component compounding technology is used for tertiary oil recovery in oilfield development. The main problems are: 1) The use of alkali for a long time will cause formation damage, which will have a negative impact on oil recovery and the environment; 2) The use of alkali will cause some surfactants and polymer instability and decomposition, limiting the choice of surfactants and polymers
However, this method only depends on the dissolution of micelles, and the improvement of oil production capacity is limited.
And because of the cost of surfactants, the application of this high concentration is very limited
[0011] However, the formulation of low-concentration systems, especially under the condition of no alkali, lacks corresponding laboratory research and theoretical guidance, and lacks experience in practical application, resulting in weak ability to systematically formulate and optimize formulas, and blindness when looking for formulas Big
Currently, there are no relevant reports

Method used

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  • Glycine betaine surfactant composition system and purpose thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Surfactant preparation: Take oil-based dimethyl betaine (from Western Surfactants Research and Development Center, USA, with 30% activity, pH 6.0 -7.0) 70 grams, heavy alkyl benzene Sodium sulfonate (from Liaoning Panjin Hailan Chemical Industry, effective content 30%, average molecular weight 390) 6.25 g, deionized water 23.75 g; add the above into a beaker, and then stir evenly at room temperature with an electromagnetic stirrer. Use sodium hydroxide Adjust the pH to 7-8 with acetic acid. The formed surfactant system is a uniform transparent liquid.

[0035] Crude oil: It comes from oil fields in Northeast China. The crude oil presents high acidity and high aromatic content.

[0036] Test instrument: TX-500C interfacial tension

[0037] Test conditions: (1) The temperature is 55 degrees Celsius; (2) The reinjection water contains 4000 mg / L of salinity; (3) No polymer is added; (4) Surfactant concentration: 1.0 g / L, that is, 1 g of the above configuration Surfactant system ...

Embodiment 2

[0041] Surfactant preparation: Take 50 grams of oleyl amide dimethyl propyl betaine (from Western Surfactants Research and Development Center, USA, with 35% activity, pH 6.0 -7.0), weight 20 grams of sodium alkylbenzene sulfonate (same source as in Example 1), 30 grams of deionized water; add the above into a beaker, and then stir evenly at room temperature with an electromagnetic stirrer. Adjust the pH to 7 with sodium hydroxide and acetic acid -8. The formed surfactant system is a uniform transparent liquid.

[0042] Crude oil: Same as Example 1.

[0043] Test instrument: TX-500C interfacial tension.

[0044] Test conditions: (1) The temperature is 55 degrees Celsius; (2) The reinjection water contains a salinity of 4000 mg / L; (3) No polymer is added; (4) Surfactant concentration: 1.0 g / L.

[0045] Test result: oil-water interfacial tension 7.8 × 10 -3 dyn / cm.

[0046] Experiments show that without adding polymer, a mixture composed of oleylamide dimethyl propyl betaine surfactant ...

Embodiment 3

[0048] Surfactant preparation: Take tetradecyl dimethyl betaine (from Western Surfactants Research and Development Center, USA, with 30% activity, pH 6.0 -7.0) 30 grams, oil base Amido dimethyl propyl betaine (same source as in Example 2) 10 grams, dodecylbenzene sulfonic acid (from Liaoning Panjin Haihailan Chemical Industry, 100%), propylene glycol, (analytical purity, from Fisher Scientific) 100 Gram, propylene glycol is used as a water-soluble additive to help the surfactant form a homogeneous and flowable solution; 106 grams of deionized water. Add the above into a beaker, and then stir evenly at room temperature with an electromagnetic stirrer. Adjust the pH to 7-8 with sodium hydroxide and acetic acid. The formed surfactant system is a uniform transparent liquid.

[0049] Crude oil: the same source as in Example 1.

[0050] Test instrument: TX-500C interfacial tension.

[0051] Test conditions: (1) temperature 55 degrees Celsius; (2) reinjection water with a salinity of 40...

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Abstract

The invention discloses a glycine betaine surfactant composition system and a purpose thereof. The glycine betaine surfactant composition system comprises one or more mixtures of a glycine betaine surfactant and an anionic surfactant. The glycine betaine surfactant comprises alkyl dimethyl betaine, alkyl amide propyl dimethyl betaine, alkyl sulphobetaine and alkyl hydroxy sulphobetaine. The use concentration ratio of the glycine betaine surfactant and the anionic surfactant, by 100% pure activity, is 1:0.1-10. The glycine betaine surfactant composition system is used for chemical displacement of reservoir oil, and enables the oil deposit of an oil well in which secondary oil-production efficiency in the later period is decreased seriously to be developed by 10-15%, and the economic efficiency is very obvious. Moreover, the use concentration is low, and cost is lowered greatly. Due to the fact that other conventional alkalis are of no need, the select face of polymers is made to be wider, and the significance for protecting natural resources is great.

Description

Technical field [0001] The invention belongs to the field of oilfield development, and relates to a chemical flooding additive for oilfield development. Specifically, it relates to a betaine surfactant composition system and its use for chemical flooding, suitable for low surfactant concentration, Chemical flooding system without alkali addition. Background technique [0002] In normal oilfield development, the first method of exploitation is to exploit the energy of the oil layer itself, that is, one-time oil recovery. At this stage, crude oil erupts with the well pipe on its own energy. Usually about 15-20% of oil reservoirs are developed in this way (that is, one-time oil recovery). With the deepening of exploitation, when natural energy cannot meet the demand due to attenuation, water or gas needs to be injected into the oil layer to maintain the production or recovery rate of the oil well. This is the secondary oil recovery stage. Another 15-20% of crude oil reserves are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584
Inventor 吴斌林增琪林晨吴安然
Owner SHANGHAI HAIGUI CHEM TECH CO LTD
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