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Composite surface active agent composition for tertiary oil recovery and preparation method and application thereof

A surfactant and composition technology, applied in the field of surfactant composition, can solve problems such as poor oil displacement efficiency, difficulty in demulsification of corroded equipment and pipelines, damage to formations and oil wells, etc., to improve oil displacement efficiency and avoid damage , to overcome the effect of cohesion

Active Publication Date: 2014-12-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] One of the technical problems to be solved by the present invention is that the existing surfactants have poor oil displacement efficiency in the tertiary oil recovery process, and at the same time, because the oil displacement system contains inorganic alkali, it will cause damage to the formation and oil wells, corrode equipment and pipelines, and be difficult to break emulsion. To solve the problem, provide a surfactant composition for tertiary oil recovery, the composition has high interface activity, strong oil washing ability, simple system, will not cause damage to formations and oil wells, will not corrode equipment and pipelines and Advantages of not causing difficulty in demulsification

Method used

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  • Composite surface active agent composition for tertiary oil recovery and preparation method and application thereof
  • Composite surface active agent composition for tertiary oil recovery and preparation method and application thereof
  • Composite surface active agent composition for tertiary oil recovery and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0032] Add dodecylamine and KOH to the reaction kettle according to the molar ratio of 1:2, stir for 30 minutes, then add the required amount of propylene oxide, at 200 o C reacted for 1 hour, then added the required amount of ethylene oxide, at 160 o C reaction for 3 hours; finally add chloroacetic acid according to the molar ratio of dodecylamine to carboxylation reagent 1:1, at 50 o C continued to react for 20 hours. After the reaction, the pH was adjusted to 1 with 5wt% hydrochloric acid aqueous solution, and the mixture was allowed to stand and separate into layers. The water phase was separated, the oil phase was adjusted to pH=8 with 10wt% KOH aqueous solution, and the water was evaporated in vacuo to obtain an anionic-nonionic surfactant.

[0033] Octadecyl dimethyl benzyl ammonium chloride and the anion-nonionic surfactant prepared by the present invention were dissolved in water respectively, stirred for 30 minutes, and mixed with a 0.3 wt % aqueous solution, and ...

Embodiment 2

[0036] Add o-phenylaniline and NaOH into the reaction kettle according to the molar ratio of 1:6, stir for 30 minutes, add the required amount of ethylene oxide, at 160 o C reacted for 3 hours, then added the required amount of ethylene oxide, at 160 o C was reacted for 7 hours; finally, sodium chloromethanesulfonate was added according to the molar ratio of o-phenylaniline and sulfonating reagent 1:8, at 120 o C continued to react for 14 hours. After the reaction, the pH was adjusted to 2 with 5wt% hydrochloric acid aqueous solution, and the mixture was allowed to stand and separate into layers. The water phase was separated, the oil phase was adjusted to pH=9 with 10wt% NaOH aqueous solution, and the water was evaporated in vacuo to obtain an anionic-nonionic surfactant.

[0037] Tetrabutylammonium chloride and the anionic-nonionic surfactant prepared by the present invention were respectively dissolved in water, stirred for 30 minutes, and formulated into a 0.3 wt % aque...

Embodiment 3

[0040] Add cyclohexylamine and NaOH to the reaction kettle according to the molar ratio of 1:4, stir for 30 minutes, add the required amount of propylene oxide, at 100 o C reacted for 20 hours, then added the required amount of oxirane, at 150 o C was reacted for 8 hours; finally, 5-chloro-pentanesulfonate sodium was added according to the molar ratio of cyclohexylamine to sulfonating reagent 1:2.5, at 120 o C continued to react for 14 hours. After the reaction, the pH was adjusted to 2 with 5wt% hydrochloric acid aqueous solution, and the mixture was allowed to stand and separate into layers. The water phase was separated, the oil phase was adjusted to pH=9 with 10wt% NaOH aqueous solution, and the solvent was removed in vacuo to obtain an anionic-nonionic surfactant.

[0041] Tetraoctyl ammonium chloride and the anionic-nonionic surfactant prepared by the present invention were respectively dissolved in water, stirred for 30 minutes, and formulated into a 0.3 wt % aqueous...

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Abstract

The invention relates to a surface active agent composition for tertiary oil recovery, and a preparation method and application thereof, and mainly solves the problems of poor displacement efficiency, and harm to the stratum and the oil field, corrosion of equipment and pipeline and difficult demulsification due to oil inorganic alkali contained in displacement system. The composition includes a cationic surface active agent and an anionic-non-ionic surface active agent; the cationic surface active agent is at least one selected from the group consisting of quaternary ammonium salt and quaternary ammonium alkali; the anionic-non-ionic surface active agent has the following general formula; and R represents C1-C30 alkyl or acyl, a m1+m2=0-100, n1+n2=0-100, R1 and R2 are independently selected from the group consisting of C1-C10 alkylene and substituted alkylene, Y1 and Y2 are independently selected from the group consisting of -SO3 (M) r and -COO (N) s, M and N are independently selected from the group consisting of H, alkali metal, ammonium or alkali-earth metal. The technical scheme well solves the problem, and can be used in intensified oil production of oil field.

Description

technical field [0001] The invention relates to a surfactant composition for tertiary oil recovery, a preparation method and application. Background technique [0002] With the increase of the world's energy demand, the rational development and utilization of oil has attracted great attention, and the requirements for the amount and efficiency of oil extraction are also getting higher and higher. Realizing the efficient exploitation of oil and gas resources not only has practical significance for increasing crude oil production, but also has important strategic significance. Conventional oil recovery methods (primary and secondary methods) generally only produce 1 / 3 of the crude oil geological reserves, and about 2 / 3 of the crude oil has not been recovered. Therefore, in the case of increasingly tight energy sources, enhanced oil recovery has become a A major topic of oil exploration research. Tertiary oil recovery technology is an effective method to increase oil recover...

Claims

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Application Information

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IPC IPC(8): C09K8/584C07C217/08C07C213/00C07C309/10C07C303/32C08G65/32C08G65/334C08G65/326C08G65/332C08G65/08
CPCC09K8/584
Inventor 李应成顾松园张卫东鲍新宁唐恒志
Owner CHINA PETROLEUM & CHEM CORP
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