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Industrial product of hexadecyl xylol sulfonate and production method thereof, surfactant and application thereof

A technology of hexadecyl xylene sulfonate and hexadecyl xylene sulfonic acid, which can be used in the preparation of sulfonate, chemical instruments and methods, drilling compositions, etc., and can solve the interfacial tension of surfactants narrowing the range, affecting the oil displacement effect of ASP flooding, and worsening the interfacial activity of surfactants, achieving the effect of good interfacial activity, low cost and strong interfacial activity

Active Publication Date: 2014-12-31
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, heavy alkylbenzene sulfonate surfactants are used in Daqing Oilfield, the alkyl carbon number is 12-24, and the effective permeability is 100μm -2 , oil layers with an effective thickness of more than 5m, the application research of ASP flooding technology has been carried out, and good oil displacement effects (enhanced recovery can reach more than 20%) and economic benefits have been achieved, but due to the heavy alkylbenzene sulfonate raw material composition The component distribution is wide, the composition is complex, and the proportion of components is difficult to control. The change of composition will lead to the narrowing of the interfacial tension range of the surfactant, the alkali span is reduced from 0.6wt% to 0.4wt%, and the interfacial activity of the surfactant becomes worse. Moreover, the stability of the composite system deteriorated (the interfacial tension stabilization time was reduced from 90 days to 60 days), which seriously affected the oil displacement effect of the ASP flooding.
Although other existing alkylbenzenesulfonate surfactants have good performance of reducing interfacial tension and high oil displacement efficiency, they have the disadvantages of many components and complicated production process, so it is necessary to seek Surfactant for oil displacement with single component and simple production process

Method used

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  • Industrial product of hexadecyl xylol sulfonate and production method thereof, surfactant and application thereof
  • Industrial product of hexadecyl xylol sulfonate and production method thereof, surfactant and application thereof
  • Industrial product of hexadecyl xylol sulfonate and production method thereof, surfactant and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Embodiment 1, preparation cetyl dimethyl benzene sulfonate industrial product

[0053] The production of cetyldimethylbenzenesulfonate industrial product comprises the following steps:

[0054] 1) Preparation of cetyl xylene: select the carbon number as C 16 The linear olefins and xylene are used as raw materials to prepare hexadecyl xylene. The preparation method is (taking 3000L scale-up application test as an example): 1500Kg toluene, 38Kg main catalyst (aluminum trichloride) and 4L secondary catalyst (polyphosphoric acid ) into a 5000L reaction kettle, stirred for 10 minutes, slowly raised the temperature until white gas was generated in the system, stopped heating, and then added 640Kg hexadecene (α-olefin) into the reaction kettle, and turned on circulating water to cool when the temperature reached 40°C, and controlled the reaction temperature. Over 60°C, keep warm for 2h. After the heat preservation, stop stirring and settling for 10 minutes, the catalyst prec...

Embodiment 2

[0074] Embodiment 2, preparation cetyl dimethyl benzene sulfonate surfactant

[0075] In the application process of oil flooding, the surfactant is required to have good fluidity, so in the industrial product (mixed solution) of sodium cetylxylene sulfonate prepared in Example 1, add a cosolvent to dilute it to obtain a product that can be used directly. Cetyldimethylbenzenesulfonate surfactant in oil flooding complex system. The auxiliary solvent can be ethanol, propanol, isopropanol or isobutanol, and the amount added is 15-20wt% of the total amount of surfactants. The amount of auxiliary solvent added should not have an upper limit technically, but considering the cost, it should not exceed 20% is the most economical.

[0076] The present invention finally obtains the surfactant-hexadecylxylene sulfonate surfactant that can be applied in the mine field, and its main composition is 50-55wt% hexadecylxylene sulfonate, 15-20wt% alcohol , unsulfonated oil (unreacted alkylbenz...

Embodiment 3

[0077] Embodiment 3, the performance detection of hexadecyl xylene sulfonate surfactant of the present invention

[0078] The hexadecyl xylene sulfonate surfactant prepared in embodiment 2 is mixed with two kinds (strong base NaOH, weak base NaOH) 2 CO 3 ) three-component chemical composite flooding system, and the interfacial tension between the composite flooding system and Daqing crude oil was measured. During the measurement, the crude oil is the wellhead degassed crude oil, and the water is the injection water; the experimental temperature is 45°C; the test instrument: the University of Texas spinning drop tensiometer, model 500.

[0079] System 1: strong base system, the measured interface activity see Figure 2A .

[0080] Surfactant: hexadecyl xylene sulfonate surfactant (take n-butanol as an example with 15% addition of n-butanol), injection concentration of 0.05wt%-0.3wt% in the ternary composite system;

[0081] Alkali: strong alkali sodium hydroxide, injected i...

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Abstract

The invention discloses an industrial product of hexadecyl xylol sulfonate and a production method thereof, a surfactant and application thereof. The surfactant prepared with the industrial product as a main ingredient has good interfacial activity, strong capacity of resisting dilution and low use concentration (0.05-0.3wt%), can enable the oil-water interfacial tension to be ultralow (order of magnitude of 10<-3>mN / m) in wider or narrower alkali concentration ranges (0.4-1.2wt%) and has good composite system stability and high flooding efficiency. The recovery ratio of core flooding experiments is enhanced by more than 20% than that of water flooding. The surfactant which is single in composition, definite in structure and excellent in properties and is stable is provided for popularization and application of tertiary oil recovery, not only can oil recovery be substantially enhanced but also the domestic formula of the surfactant is achieved and the cost of ASP (alkaline-surfactant-polymer) flooding is greatly reduced.

Description

technical field [0001] The present invention relates to heavy alkylbenzene sulfonate surfactants for oil flooding in oil fields, in particular to a hexadecyl xylene sulfonate with single composition, exact structure, excellent performance and stability suitable for oil field chemical composite oil flooding A salt industrial product, a surfactant directly using the industrial product and a preparation method thereof. Background technique [0002] Petroleum is a non-renewable resource. With the rapid development of my country's economy, the demand for petroleum is increasing day by day. The exploitation of oil is related to the overall situation of the national economy, and plays a vital role in the sustainable development of our country's economy and energy security. [0003] The exploitation of oil is divided into three stages: at first, it relies on the natural energy of the stratum to extract, which is called primary oil recovery, and the general recovery rate is 5%-10%; ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C309/31C07C303/32C09K8/584
Inventor 程杰成吴军政丁玉敬
Owner PETROCHINA CO LTD
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