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Fatty acid mixture amide propyl betaine compound and application

A technology of fatty acid amidopropyl beet and fatty acid amidopropyl sulfopropyl beet, which is applied in the field of chemical compound flooding composition, application of chemical compound flooding composition in tertiary oil recovery, and mixed fatty acid amidopropyl betaine compound, It can solve problems such as affecting application and poor solubility, and achieve the effects of diverse production raw materials, improved oil-water interface performance, and improved versatility.

Active Publication Date: 2014-01-22
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of the difficulties in alkali-free binary compound flooding technology is the development of high-efficiency surfactants: under alkali-free conditions, they can achieve ultra-low interfacial tension (10 -3 mN / m order of magnitude and below) puts forward very high requirements for active agents, and traditional heavy alkylbenzene sulfonate and petroleum sulfonate products basically cannot meet the needs
[0005] The amphoteric surfactant represented by sulfobetaine is a kind of surfactant agent with good performance for alkali-free binary composite flooding that has emerged in recent years. It has good interface performance, qualified adsorption, temperature resistance and salt resistance and High oil displacement efficiency; however, sulfobetaine has a high Krafft point (Krafft point), and its solubility is poor in low salinity reservoirs, which affects its application

Method used

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  • Fatty acid mixture amide propyl betaine compound and application
  • Fatty acid mixture amide propyl betaine compound and application
  • Fatty acid mixture amide propyl betaine compound and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0043] (1) Preparation of rapeseed oil fatty acid

[0044] 1. Take rapeseed oil and put it into a high-pressure reactor, then add deionized water, hydrolyze it at 260°C and 5.0MPa for 8 hours, take samples to analyze the acid value and saponification value of fatty acids, and stop the reaction when the hydrolysis rate reaches more than 98%. Discharge.

[0045] 2. Preparation of rapeseed oil fatty acid amides

[0046] Add a certain amount of rapeseed oil fatty acid and N,N-dimethyl-1,3-propanediamine (the ratio of substances is 1:1.2) to the autoclave, react at 150-220°C for 6-10h, Rapeseed oil fatty acid amide can be prepared.

[0047] 3. Preparation of rapeseed oil fatty acid amidopropyl carboxyethyl betaine

[0048] Add rapeseed oil fatty acid amide and sodium chloroacetate (mass ratio: 1:1.05) into a four-neck round bottom flask, add isopropanol-water mixed solvent, and react at 70-80°C for more than 10 hours to obtain rapeseed oil Fatty acid amidopropyl carboxyethyl be...

Embodiment 1

[0058] Example 1 Oil-water interfacial tension test in block 1 of reservoir 1

[0059] Rapeseed oil fatty acid amide propyl hydroxypropyl sultaine alone. The produced water of oil reservoir 1 block 1 was used to prepare rapeseed oil fatty acid amidopropyl hydroxypropyl sulfobetaine with mass concentrations of 0.05%, 0.10% and 0.20%, and polymer HPAM with a mass percentage concentration of 0.12% Measure the interfacial tension between the metachemical compound flooding composition and the crude oil in block 1 of reservoir 1.

[0060] Oleamidopropyl hydroxypropyl sultaine was used as a control. The test results are shown in Table 1.

[0061] Table 1. Test results of oil-water interfacial tension under the condition of block 1 in reservoir 1

[0062]

Embodiment 2

[0063] Example 2 Oil-water interfacial tension test in block 2 of reservoir 1

[0064] Rapeseed oil fatty acid amidopropyl carboxyethyl betaine and rapeseed oil fatty acid amidopropyl hydroxypropyl sulfobetaine are compounded to form a rapeseed oil fatty acid amidopropyl betaine compound. In terms of weight ratio, rapeseed Oil fatty acid amidopropyl carboxyethyl betaine: rapeseed oil fatty acid amidopropyl hydroxypropyl sultaine=70:30. Alkali-free binary chemical compounding with rapeseed oil fatty acid amidopropyl betaine compound mass concentrations of 0.05%, 0.10% and 0.20% and polymer HPAM mass percentage concentration of 0.15% was prepared with the produced water of oil reservoir 1 block 2 The flooding composition was used to measure the interfacial tension between it and the crude oil in block 2 of reservoir 1.

[0065] Oleamidopropyl carboxyethyl betaine was used as a control. The test results are shown in Table 2.

[0066] Table 2 Test results of oil-water interfaci...

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Abstract

The invention relates to a fatty acid mixture amide propyl betaine compound and an application of fatty acid mixture amide propyl betaine chemical compound flooding composition in tertiary oil recovery. The fatty acid mixture amide propyl betaine chemical compound flooding composition comprises the components in percentage by weight as follows: 0.03-0.30% of the fatty acid mixture amide propyl betaine compound, 0.05-0.30% of a polymer and the balance of water. The fatty acid mixture amide propyl betaine compound is applied to the chemical compound flooding composition, and the interfacial activity of a system and the solubility of surfactants can be strengthened through synergy between carbon chains with different lengths and different hydrophilic group surfactants in the fatty acid mixture amide propyl betaine.

Description

technical field [0001] The invention relates to a mixed fatty acid amidopropyl betaine compound, a chemical compound flooding composition composed of the compound and its application, in particular to the application of the chemical compound flooding composition in tertiary oil recovery, which belongs to the technical field of petroleum exploitation . Background technique [0002] With the continuous development of oilfields, China's main onshore oilfields have entered a stage of high recovery and high water cut. While the output of crude oil is decreasing, the demand for crude oil is increasing day by day due to domestic economic development. Stabilizing and increasing production in mature oilfields has become an important issue for oilfield development workers. [0003] The results of CNPC's second tertiary oil recovery potential evaluation show that chemical flooding is the main enhanced oil recovery technology adapting to the reservoir conditions in my country. The de...

Claims

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Application Information

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IPC IPC(8): C09K8/584E21B43/22
CPCC09K8/584E21B43/16
Inventor 蔡红岩马德胜吴康云罗文利
Owner PETROCHINA CO LTD
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