A kind of petroleum sulfonic acid sodium salt composition and its preparation method and application

A technology of sodium petroleum sulfonate and composition, which is applied in the direction of earthwork drilling, wellbore/well components, and production fluids, etc., and can solve the problem of increasing the difficulty of producing liquid water treatment, increasing the cost of oil displacement agents, and increasing the concentration of polymers and other problems, to achieve the effect of being conducive to industrial continuous production, simplifying the synthesis reaction process, and reducing the interfacial tension of oil and water

Active Publication Date: 2021-08-27
PETROCHINA CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

However, some problems have been exposed in the field test of strong alkali ASP flooding: firstly, due to the high concentration of strong alkali used in the compound system, the scale of the oil well is serious, the inspection period of the pump is shortened, the equipment is seriously corroded, and the productivity of the oil well is reduced; The output fluid emulsification is serious in the alkali complex system, which makes it difficult to demulsify and dehydrate the output fluid, which increases the technical difficulty and additional cost of oil recovery; in addition, because the alkali concentration has a great influence on the viscosity of the ternary system, In order to achieve the designed flow control capability, the concentration of the polymer in the formulation system has to be increased, thus increasing the cost of the oil displacement agent
Chinese patent CN 1782019 A uses different carbon chain alkylbenzene sulfonate combinations to obtain heavy alkylbenzene sulfonate products suitable for weak alkali composite flooding. However, due to the limited raw materials of heavy alkylbenzene in my country, the number of synthetic products cannot meet the needs of composite flooding sites. In addition, heavy alkylbenzene sulfonate products cannot achieve ultra-low interfacial tension under alkali-free conditions
Chinese patent CN 1458220A uses the second-line decompression distillate as the raw material, but due to the low molecular weight of the raw material, it often needs to be compounded with other types of surfactants to have good adaptability, and the alkali-free system described in the patent needs to add salt Alternative base
At the same time, the technical solution disclosed in Chinese patent CN1275431A also has problems such as narrow molecular weight range of raw materials and poor product adaptability, and because the selected raw material aromatics content is low, it is necessary to extract and separate unreacted oil in the synthesis process.

Method used

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  • A kind of petroleum sulfonic acid sodium salt composition and its preparation method and application
  • A kind of petroleum sulfonic acid sodium salt composition and its preparation method and application
  • A kind of petroleum sulfonic acid sodium salt composition and its preparation method and application

Examples

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Embodiment 1

[0046] Present embodiment provides a kind of preparation method of petroleum sulfonic acid sodium salt composition, it comprises the following steps:

[0047] In this example, the second-line and third-line dewaxed dewaxed oils of the Dalian Petrochemical Plant are used as raw materials. Based on the total weight of the mixture as 100%, it contains 65wt% of the second-line dewaxed dewaxed oil and 35wt% of the dewaxed oil of the second line of decompression. Vacuum three-line reverse sequence dewaxed oil, and the content of aromatics in the mixture is 30wt%-32wt%;

[0048] SO 3 Membrane sulfonation reaction (realized in membrane sulfonation reactor) temperature is 50-60 ° C, SO 3 The volume concentration of the gas is 5%-6%, n-butanol is the diluent, and the consumption is 1wt%;

[0049] Neutralize with 25wt% NaOH solution to make the product pH value reach 8-9, and the homogeneous product obtained is sodium petroleum sulfonate surfactant (active substance effective content a...

Embodiment 2

[0058] Present embodiment provides a kind of preparation method of petroleum sulfonic acid sodium salt composition, it comprises the following steps:

[0059] In this example, the second decompression line, the third decompression line reverse sequence dewaxed oil and the second decompression line furfural oil extracted from Dalian Petrochemical Plant are used as raw materials. Based on the total weight of the mixture as 100%, it contains 50 wt% of the second decompression line reverse sequence dewaxing oil. Dewaxed oil, 30wt% vacuum third-line reverse sequence dewaxed oil and 20wt% vacuum second-line furfural extraction oil, and the content of aromatics in the mixture is 38wt%-42wt%;

[0060] SO 3 The sulfonation reaction temperature is 65-70°C, SO 3 The volume concentration of the gas is 7%-9%, n-butanol is the diluent, and the consumption is 2wt%.

[0061] Neutralize with 20wt% NaOH solution to make the product pH value reach 9-10, and the homogeneous product obtained is ...

Embodiment 3

[0070] Present embodiment provides a kind of preparation method of petroleum sulfonic acid sodium salt composition, it comprises the following steps:

[0071] In this example, the dewaxed dewaxed oil from the second decompression line, the third decompression line decompression line and the furfural extracted oil from the decompression second line decompression line of Dalian Petrochemical Plant are used as raw materials. Based on the total weight of the mixture as 100%, it contains 45wt% of the decompression second line reverse sequence dewaxing oil. Dewaxed oil, 45wt% vacuum third-line reverse sequence dewaxed oil and 10wt% vacuum second-line furfural extracted oil, and the content of aromatics in the mixture is 34wt%-37wt%;

[0072] SO 3 The sulfonation reaction temperature is 65-70°C, SO 3 The volume concentration of the gas is 6%-7%, n-octanol is the diluent, and the consumption is 1.2wt%.

[0073] Neutralize with 25wt% NaOH solution to make the product pH 8-9, and the ...

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Abstract

The invention provides a petroleum sulfonic acid sodium salt composition, a preparation method and application thereof. The preparation method comprises taking the total weight of the mixture as 100%, 5wt%-95wt% fraction 1 with an average molecular weight of 252-312, 5wt%-95wt% fraction 2 with an average molecular weight of 313-395 and 0-50wt% % average molecular weight is that fraction 3 of 396-490 is mixed homogeneously, obtains mixture; Add diluent in mixture, obtain the product after dilution, adopt SO 3 The gas is subjected to sulfonation treatment on the diluted product to obtain a product after sulfonation treatment; wherein, the diluent includes one or a combination of alcohols with a carbon chain length of C3-C10, and the amount is the weight of the mixture 0.1%-10% of 0.1%-10%; and then use sodium hydroxide aqueous solution to neutralize the petroleum sulfonic acid in the product after sulfonation treatment until the pH value of the system is 7-10 to obtain the petroleum sulfonic acid sodium salt composition.

Description

technical field [0001] The invention relates to a petroleum sulfonic acid sodium salt composition, a preparation method and application thereof, and belongs to the technical field of petroleum exploitation. Background technique [0002] Tertiary oil recovery (EOR) technology is an important oilfield development technology that can use new technologies such as physics, chemistry and biology to enhance oil recovery. Among them, chemical composite flooding is an effective method in tertiary oil recovery technology that can greatly increase oil recovery in oilfields, and generally can increase oil recovery by more than 15%. Strong alkali (NaOH) ASP flooding using alkylbenzene sulfonate as surfactant has been applied in field test in Daqing Oilfield. The test results show that ASP flooding can increase recovery by more than 20%. However, some problems have been exposed in the field test of strong alkali ASP flooding: firstly, due to the high concentration of strong alkali used i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/22
Inventor 朱友益王哲
Owner PETROCHINA CO LTD
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