Non-base oil-displacing agent composition of bi-alkyl carboxylate and its use

A technology of alkyl carboxylate and composition, which is applied in the field of anionic gemini carboxylate alkali-free oil displacement agent composition, and can solve the problem problems such as materials, etc., to achieve the effect of easy implementation, good oil displacement effect and low production cost

Inactive Publication Date: 2007-09-05
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far in tertiary oil recovery, there is no published related Gemi

Method used

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  • Non-base oil-displacing agent composition of bi-alkyl carboxylate and its use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Example 1: Synthesis of Double Fourteen

[0062] ① Synthesis of myristyl chloride

[0063] Take 20-38 g of myristic acid and 15-25 g of thionyl chloride, stir and react for 2-4 hours, and reflux at 70-90°C until no gas is generated in the exhaust gas drying tube. Then the excess thionyl chloride was distilled off under reduced pressure, and then distilled under reduced pressure.

[0064] ②Synthesis of intermediate ethylenediaminediacetic acid

[0065] Chloroacetic acid 10-20g, water 30-50ml, anhydrous sodium carbonate 5-12g, to obtain sodium chloroacetate solution.

[0066] Anhydrous ethylenediamine 2-7g, water 20-45ml, sodium chloroacetate solution 12-21g. After constant temperature for 24h, reflux at 70-80℃ for 2-4h to keep the solution pH=8-9. After distillation under reduced pressure at 60-70℃, add concentrated hydrochloric acid to the concentrated solution to pH=1-2, with white precipitate Generated and washed with distilled water 3 times to obtain intermediate sodium ...

Embodiment 2

[0069] Example 2: Gemini alkyl carboxylate alkali-free oil-displacing agent composition, the components are as follows, all in mass percentage:

[0070] Dioleic acid 0.01wt%;

[0071] FBB-2 0.06wt%;

[0072] HF-2 0.08wt%;

[0073] HPAM 0.2wt%;

[0074] The mineralized water of the oilfield formation is 99.65wt%.

Embodiment 3

[0075] Example 3: Gemini alkyl carboxylate alkali-free oil-displacing agent composition, the components are as follows, all in mass percentage:

[0076] Dioleic acid 0.04wt%

[0077] FBB-2 0.09wt%;

[0078] HF-2 0.07wt%;

[0079] HPAM 0.2wt%

[0080] The mineralized water of the oilfield formation is 99.6wt%.

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Abstract

A dual alkyl carboxylate alkali-free oil-displacing agent composition and its use are disclosed. It consists of dual alkyl carboxylate and C14-18 mixed carboxylate 0.01-0.1wt%, C14-18 mixed carboxylic polyethenoxy ether, HPAM and water. The process is carried out by taking organic acid and sulfoxide chloride as raw materials, acyl chloride synthesizing, reacting ethylenediamine with sodium chloroacetate to synthesize intermediate sodium EDDA, and reacting it with acyl chloride to synthesize the final product. It has excellent oil-displacing effect.

Description

Technical field [0001] The technology relates to an anionic gemini carboxylate alkali-free oil-displacing agent composition and its application. Background technique [0002] As an important strategic material, petroleum has an important position in social development and has become the "blood" of industry. The extraction of crude oil can be divided into three stages: the first stage means that the crude oil is spouted out by the pressure of the formation, which is called primary oil recovery, and the recovery rate is about 15wt%; in the later stage of spouting, water can be injected from the well. Maintaining formation pressure is called secondary oil recovery, and the recovery rate is about 15-20wt%; residual oil in the formation after water flooding still accounts for 60-70wt%, and it needs to be driven out by physical and chemical methods, called tertiary oil recovery. [0003] At present, there are many oil displacement methods used in crude oil extraction. From the current ...

Claims

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Application Information

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IPC IPC(8): C09K8/588
Inventor 郑利强姚志钢于丽董彬李干佐赵明伟李真蔡亚琪邢小丽
Owner SHANDONG UNIV
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