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Composite demulsifier composition and demulsifier for ASP flooding production fluid

A ternary compound, demulsifier technology, applied in the direction of dehydration/demulsification by chemical methods, can solve problems such as unsatisfactory demulsification effect, and achieve the effects of high demulsification and dehydration rate, reduced water weight percentage, and weak corrosion.

Active Publication Date: 2021-08-03
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a compound type demulsifier composition and demulsifier for ASP flooding production fluid, to solve the problem of containing high content of alkali, surfactant and polymer in the prior art Unsatisfactory demulsification effect of ASP flooding produced fluid

Method used

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  • Composite demulsifier composition and demulsifier for ASP flooding production fluid
  • Composite demulsifier composition and demulsifier for ASP flooding production fluid
  • Composite demulsifier composition and demulsifier for ASP flooding production fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The composition of the demulsifier component that adopts in compound type demulsifier composition is as follows:

[0036] AR type demulsifier is an oil-soluble non-ionic demulsifier, with phenolic resin as the initiator, toluene-2,4-diisocyanate as the crosslinking agent, the product solid content is 80%, the solvent is xylene, the color (APHA) is 360, the hydroxyl value is 38.5mgKOH / g, and the pH value is 7;

[0037] SP-type demulsifier is a non-ionic surfactant component, with polyol as the initiator, NaOH and ethylene oxide as the catalyst, the solid content of the product is 80%, the solvent is xylene, the color (APHA) is 300, the hydroxyl value is 53.5mgKOH / g, and the pH value is 8;

[0038] AE type demulsifier is a non-ionic demulsifier, with polyethylene polyamine as the initiator, toluene-2,4-diisocyanate as the crosslinking agent, the solid content of the product is 80%, the solvent is methanol, and the chromaticity (APHA) is 250, the hydroxyl value is 42.5mg...

Embodiment 2

[0046] The amount of AR type demulsifier, SP type demulsifier and AE type demulsifier, the amount of methanol, and the weight percentage content of demulsifier components in the compound type demulsifier are shown in Table 1, and the others are the same as in Example 1.

Embodiment 3

[0048] The amount of AR type demulsifier, SP type demulsifier and AE type demulsifier, the amount of methanol, and the weight percentage content of demulsifier components in the compound type demulsifier are shown in Table 1, and the others are the same as in Example 1.

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Abstract

The invention provides a composite type demulsifier composition and demulsifier used for the production fluid of three-element compound flooding. The compound demulsifier composition used for ASP flooding production fluid includes demulsifier components, and the demulsifier components include AR type demulsifiers, SP demulsifiers and AE demulsifiers, and in the demulsifier components AR The weight percentage of type demulsifier is 10-25% based on the solid content of 80%, the weight percentage of SP-type demulsifier is 45-80% based on the solid content of 80%, and the weight percentage of AE-type demulsifier is based on the solid content of 80%. The weight percentage is 10~45%. The demulsifier prepared by using the demulsifier composition has the advantages of high demulsification and dehydration rate, neat oil-water interface, clear and translucent dewatered water, and demulsification of the three-component compound flooding production fluid containing high content of alkali, surfactant and polymer. The oil content in the sewage after demulsification and the weight percentage of water in the purified oil can both be greatly reduced.

Description

technical field [0001] The invention relates to the field of oil recovery technology, in particular to a composite demulsifier composition and demulsifier used for ASP flooding production fluid. Background technique [0002] Water is often mixed in the oil extraction process, and the crude oil must be dehydrated before transportation to reduce transportation costs. The free water in crude oil is easy to separate and remove, while the emulsified water in crude oil generally needs to be removed by adding a demulsifier. As an important EOR technology, ASP flooding was industrialized in Xinjiang Oilfield in 2014. At present, the cumulative oil production of the produced fluid of weak alkali ASP flooding carried out in the Qidong 1 area of ​​Xinjiang Oilfield has exceeded 130,000 tons. Preliminary studies have shown that the produced fluid of ASP flooding in Xinjiang Oilfield contains high content of alkali, surfactant and polymer. The synergistic effect of alkali, surfactant ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G33/04C08G18/54C08G18/32C08G65/28
Inventor 斯绍雄宫兆波严忠任召言张玉敏胡君
Owner PETROCHINA CO LTD