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Petroleum sulfonate composition, preparation method and application thereof

A petroleum sulfonate and composition technology, which is applied in the direction of sulfonate preparation, sulfonic acid preparation, drilling composition, etc., can solve the problem that the quantity of synthetic products cannot meet the composite flooding field test, cannot achieve ultra-low interfacial tension, Reduce the oil-water interfacial tension, wide molecular weight range, and reduce the cost of synthetic products to solve problems such as shortened pump inspection cycle

Inactive Publication Date: 2011-01-26
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some problems have been exposed in the field test of strong alkali ASP flooding: due to the use of high concentration of strong alkali in the compound system, the scale of the oil well is serious, the inspection period of the pump is shortened, the equipment is corroded seriously, and the productivity of the oil well is reduced
The previously applied patent ZL 200410096431.9, titled "An Alkylbenzene Sulfonate Composition and Preparation Method", introduced the combination of alkylbenzene sulfonates with different carbon chains to obtain heavy alkylbenzene sulfonate suitable for weak alkali composite flooding. salt products, due to the limited raw materials of heavy alkylbenzene in my country, the number of synthetic products cannot meet the needs of composite flooding field tests. In addition, heavy alkylbenzene sulfonate products cannot achieve ultra-low interfacial tension under alkali-free conditions

Method used

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  • Petroleum sulfonate composition, preparation method and application thereof
  • Petroleum sulfonate composition, preparation method and application thereof
  • Petroleum sulfonate composition, preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0031] The present invention adopts the reverse-sequence dewaxed oil of the second line of decompression and the third line of decompression of Dalian Petrochemical Plant as raw materials, and the ratio is 60:40 (W / W), SO 3 The sulfonation reaction temperature is 60°C, neutralized with 25% NaOH solution, so that the pH value of the product reaches 7-10, and the obtained homogeneous product is sodium petroleum sulfonate surfactant (active substance effective content 35%). Table 1 shows the interfacial tension test results of the synthetic product on the oil and water of Daqing No. 4 Plant. The interfacial tension testing instrument adopts TEXAS-500C spinning drop interfacial tensiometer, and the surfactant is formulated with formation water reinjection sewage from oil field oil production plant to a concentration of 0.05-0.3% (wt), and the interfacial tension is a stable equilibrium value for 2 hours of testing. It can be seen from the experimental data that, in addition to the...

Embodiment 2

[0036] The present invention uses Dalian Petrochemical Plant's decompression second line, decompression third line reverse sequence dewaxed oil and decompression second line furfural extracted oil as raw materials, the ratio is 55:30:15 (W / W / W), SO 3 The sulfonation reaction temperature is 65°C, neutralized with 20% NaOH solution, so that the pH value of the product reaches 7-10, and the obtained homogeneous product is sodium petroleum sulfonate surfactant (active substance effective content 40%). Table 2 shows the interfacial tension test results of the synthetic product on the oil and water of Daqing No. 4 Plant. The surface active agent is prepared with formation water reinjection sewage from an oil field oil production plant to a concentration of 0.05-0.3% (wt), and the interfacial tension is a stable equilibrium value after testing for 2 hours.

[0037] Table 2 Petroleum sulfonate product PS-2 to crude oil / sewage interfacial tension of Daqing No. 4 Plant

[0038] (polyme...

Embodiment 3

[0041] The present invention uses Dalian Petrochemical Plant decompression second line, decompression third line reverse sequence dewaxed oil and decompression second line furfural extracted oil as raw materials, the ratio is 55:25:20 (W / W / W), SO 3The sulfonation reaction temperature is 65°C, neutralized with 20% NaOH solution, so that the pH value of the product reaches 7-10, and the obtained homogeneous product is sodium petroleum sulfonate surfactant (active substance effective content 44%). Table 3 shows the interfacial tension test results of the synthetic product on the oil and water of Daqing No. 4 Plant. The surface active agent is prepared with formation water reinjection sewage from an oil field oil production plant to a concentration of 0.05-0.3% (wt), and the interfacial tension is a stable equilibrium value after testing for 2 hours.

[0042] Table 3 Petroleum sulfonate product PS-3 to crude oil / sewage interfacial tension of Daqing No. 4 Plant

[0043] (polymer H...

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Abstract

The invention relates to a petroleum sulfonate composition, a preparation method and application thereof. The preparation method comprises the following steps of: mixing two or more than two of vacuum second-line, vacuum third-line or vacuum fourth-line inverted dewaxed oil or vacuum second-line, vacuum third-line or vacuum fourth-line distillate oil or vacuum second-line, vacuum third-line or vacuum fourth-line furfural extract oil serving as raw materials of which aromatic hydrocarbon content is more than 26 percent and which comprise the components in weight by percentage: 5 to 95 percent of fractions with average molecular weight of 252 to 312, 5 to 95 percent of fractions with average molecular weight of 313 to 395 and 0 to 50 percent of fractions with average molecular weight of 396 to 490; sulfonating by using SO3 at the temperature of between 50 and 80 DEG C; and neutralizing by using 15 to 40 percent alkali liquor until the pH value is between 7 and 10 to obtain a sulfonate composition. The petroleum sulfonate composition can improve the displacement efficiency by over 20 percent under weak alkali and alkali-free composite systems and weaken or eliminate scale formation caused by alkali, and has the advantages of low concentration of used polymers and low cost of combination flooding.

Description

technical field [0001] The invention relates to a petroleum sulfonate composition, especially in tertiary oil recovery, a composition for making the oil-water surface reach ultra-low interfacial tension in weak alkali and alkali-free composite flooding, a preparation method and application thereof. 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. Chemical compound flooding is an effective method in the tertiary oil recovery technology that can greatly increase the oil recovery rate of high water-cut oilfields, and generally can increase the oil recovery rate by more than 15%. The strong alkali ASP flooding using alkylbenzene sulfonate has been applied in Daqing Oilfield field test. The test results show that the ASP flooding can increase the recovery rate by more than 20%. However, some problems have been exposed i...

Claims

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Application Information

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IPC IPC(8): C07C309/62C07C303/32C07C303/06C09K8/584E21B43/22
Inventor 朱友益韩冬王红庄
Owner PETROCHINA CO LTD
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