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Surfactant for oil field and preparation method of surfactant

A surfactant and oilfield technology, applied in the direction of sulfonate preparation, chemical instruments and methods, drilling compositions, etc., can solve the problems of surfactant loss, plugging rock pores, chromatographic separation, etc., to prevent chromatographic separation , good salt tolerance

Active Publication Date: 2013-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The formation of precipitates will not only lead to the loss of surfactant, but also block the pores of the rock, and even reduce the performance of the surfactant flooding system
Therefore, the use of petroleum sulfonate in high salinity reservoirs is limited
Salt resistance can be achieved by compounding with other surfactants, but the compounded surfactant system is prone to severe "chromatographic separation" phenomenon during the formation migration process, which leads to compounding failure

Method used

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  • Surfactant for oil field and preparation method of surfactant
  • Surfactant for oil field and preparation method of surfactant
  • Surfactant for oil field and preparation method of surfactant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The 1st step, take by weighing 590g minus second-line distillate oil (average molecular weight is 295, and aromatic hydrocarbon content is 30.9%) and is placed in the there-necked flask that thermometer, stirrer, condenser tube (drying tube is housed), add 200g glacial acetic acid, Add 36 g of paraformaldehyde (1.2 mol) to 82 g of anhydrous zinc chloride (0.6 mol), start the stirrer, and feed 1.2 mol of hydrogen chloride gas at the same time, and stir and react at 70° C. for 2 hours. After the reaction was completed and cooled, it was poured into a separatory funnel, and the organic matter in the upper layer was obtained by separation. Wash with 20% sodium carbonate solution and water successively until pH = 7, and distill under reduced pressure to obtain a brown viscous oily liquid.

[0051] Step 2: Add 292g of tetraethylene glycol (about 1.5mol) into a three-necked flask equipped with a thermometer, dropping funnel, and stirrer, add 7g of sodium, and heat to 80°C to c...

Embodiment 2

[0061] The 1st step, take by weighing 530g (average molecular weight 325, aromatics content is 36.8%) of minus three-line distillate oil and place in the there-necked flask that thermometer, stirrer, condenser tube (drying tube is equipped with), add 200g glacial acetic acid, 82g Add 36 g of paraformaldehyde (1.2 mol) to anhydrous zinc chloride (0.6 mol), start the stirrer, and simultaneously feed 1.2 mol of hydrogen chloride gas, and stir and react at 70° C. for 2 hours. After the reaction was completed and cooled, it was poured into a separatory funnel, and the organic matter in the upper layer was obtained by separation. Wash with 20% sodium carbonate solution and water successively until pH = 7, and distill under reduced pressure to obtain a brown viscous oily liquid.

[0062] Step 2: Add 292g of tetraethylene glycol (about 1.5mol) into a three-necked flask equipped with a thermometer, dropping funnel, and stirrer, add 7g of sodium, and heat to 80°C to completely dissolve ...

Embodiment 3

[0066] The 1st step, take by weighing furfural refining to extract oil 394g (average molecular weight 405, aromatics content is 61.8%), place in the there-necked flask that thermometer, stirrer, condenser (drying tube is housed), add 200g glacial acetic acid, Add 36 g of paraformaldehyde (1.2 mol) to 82 g of anhydrous zinc chloride (0.6 mol), start the stirrer, and feed 1.2 mol of hydrogen chloride gas at the same time, and stir and react at 70° C. for 2 hours. After the reaction was completed and cooled, it was poured into a separatory funnel, and the organic matter in the upper layer was obtained by separation. Wash with 20% sodium carbonate solution and water successively until pH = 7, and distill under reduced pressure to obtain a brown viscous oily liquid.

[0067] Step 2: Add 292g of tetraethylene glycol (about 1.5mol) into a three-necked flask equipped with a thermometer, dropping funnel, and stirrer, add 7g of sodium, and heat to 80°C to completely dissolve the sodium....

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Abstract

The invention relates to a tertiary oil recovery displacement agent modified petroleum sulfonate and a preparation method thereof. The preparation method comprises the following steps: introducing a non-ion group polyoxygen alkyl group in a raw material oil molecular, wherein vacuum cut 2 distillate, vacuum cut 3 distillate. or furfural refined extract oil are used as raw material oils, and then carrying out sulfonation with sulfur trioxide, so that a non-ion group (polyoxygen alkyl group) and an anion group (sulfo group) are in the same surfactant molecular. The modified petroleum sulfonate takes an effect of combination and prevents chromatograph, and has the advantages of non-ion surfactants and anion surfactants as well as good salt resistance and high-temperature resistance capabilities. The prepared modified petroleum sulfonate serving as the surfactant for displacing oil can be used in surfactant displacement or compound displacement.

Description

technical field [0001] The invention relates to a modified petroleum sulfonate as an oil displacement agent for tertiary oil recovery and a preparation method thereof, which belongs to an anionic-nonionic surfactant and a preparation method thereof. Background technique [0002] Chemical compound flooding technology is a new technology for tertiary oil recovery, which uses organic compounding between alkali, surfactant and high molecular polymer to greatly improve oil displacement efficiency. Petroleum sulfonate is the most widely used surfactant in tertiary oil recovery. Petroleum sulfonate is an anionic surfactant synthesized from aromatic-rich crude oil or distillate oil, and its main component is monosulfonate of aromatic compounds. 三次采油用石油磺酸盐的制备方法,中国专利有98101774.6、99107580.3、01129677.1、01110282.9、02125840.6、200610111622.7、200680052521.5等,美国专利有US Pat4144266-1979、US Pat4148821-1979、USPat4541940-1985、US Pat4541939-1985 , US Pat4614623-1986, USPat4557840-1985, etc. Petrole...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584B01F17/42C07C303/32C09K23/42
Inventor 于芳胡建军吴江勇杨捷吴巍王晓春王建宇高文骥
Owner CHINA PETROLEUM & CHEM CORP