Natural gas foam stabilizer system and preparation method thereof

A technology of foam stabilizer and natural gas, which is applied in the field of natural gas foam stabilizer system and its preparation, and can solve the problems of few reports on the stability of natural gas foam system, the reduction of foam volume and stability, and the weakening of nano-SiO adsorption, etc. problem, to avoid poor anti-rock adsorption ability, good foam stability, and good foaming effect

Inactive Publication Date: 2018-02-02
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with CaCl 2 The addition of SDS/SiO 2 The foaming volume and stability of the system are reduced, and the hydrophobically modified nano-SiO 2 Both the SDS head group and the SDS head group are negatively charged, and there is an electrostatic repulsion between the two, which will offset part of the attraction between

Method used

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  • Natural gas foam stabilizer system and preparation method thereof
  • Natural gas foam stabilizer system and preparation method thereof
  • Natural gas foam stabilizer system and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A natural gas foam stabilizer system composed of the following components by mass percentage: nano SiO 2 The particle dispersion is 22.7%, the fatty alcohol polyoxyethylene ether sodium sulfate with an EO number of 3 0.006%, the rest is mineralized water, the mineralized water is made of NaCl, and the total salinity is 100000mg·L -1 .

[0032] The preparation method is as follows: NaCl is added to water and stirred uniformly at room temperature to prepare mineralized water, and 0.1g of fatty alcohol polyoxyethylene ether sodium sulfate with EO number of 3 is dissolved in 1665.9g of mineralized water and stirred evenly to obtain 0.006% EO number 3 fatty alcohol polyoxyethylene ether sodium sulfate aqueous solution, take 15.46g from it, and gradually add 4.54g nano SiO 2 The particle dispersion is evenly mixed to obtain a natural gas foam stabilizer system suitable for high temperature and high salt environments.

[0033] Foam property evaluation test, such as figure 1 As shown...

Embodiment 2

[0035] A natural gas foam stabilizer system composed of the following components by mass percentage: nano SiO 2 The particle dispersion is 22.7%, the fatty alcohol polyoxyethylene ether sodium sulfate with an EO number of 3 is 0.006%, and the rest is mineralized water, which is composed of CaCl 2 It is formulated with a total salinity of 100000mg·L -1 .

[0036] The preparation method is as follows: CaCl 2 Add into water and stir evenly to prepare mineralized water, take 0.1g of fatty alcohol polyoxyethylene ether sodium sulfate with EO number of 3, dissolve in 1665.9g of mineralized water, stir evenly to obtain 0.006% of fatty alcohol polyoxyethylene with EO number of 3 Ether sodium sulfate aqueous solution, take 15.46g from it, gradually add 4.54g nano SiO 2 The particle dispersion is evenly mixed to obtain a natural gas foam stabilizer system suitable for high temperature and high salt environments.

[0037] Foam property evaluation test, in CaCl 2 Prepared 100000mg·L -1 In the m...

Embodiment 3

[0039] A natural gas foam stabilizer system composed of the following components by mass percentage: nano SiO 2 The particle dispersion is 56.8%, the fatty alcohol polyoxyethylene ether sodium sulfate with an EO number of 3 is 0.012%, and the rest is mineralized water. The mineralized water is prepared from NaCl, with a total salinity of 100000 mg.L -1 .

[0040] The preparation method is as follows: NaCl is added to water and stirred uniformly at room temperature to prepare mineralized water, and 0.2g of fatty alcohol polyoxyethylene ether sodium sulfate with EO number of 3 is dissolved in 1665.8g of mineralized water and stirred evenly to obtain 0.012% EO. 3 fatty alcohol polyoxyethylene ether sodium sulfate aqueous solution, take 8.64g from it, and gradually add 11.36g nano-SiO 2 The particle dispersion is evenly mixed to obtain a natural gas foam stabilizer system suitable for high temperature and high salt environments.

[0041] Foam property evaluation test, 100000mg·L prepare...

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Abstract

The invention discloses a natural gas foam stabilizer system. The natural gas foam stabilizer system consists of the following components in percentages by mass: 22.7%-56.8% of nano particle dispersion liquid, 0.006%-0.01% of a surfactant and 5,000-100,000 mg.L<-1> of mineralized water. The invention further discloses a preparation method of the natural gas foam stabilizer system. The preparationmethod comprises the following steps: adding NaCl or CaCl2 in water at normal temperature, stirring uniformly and preparing into the mineralized water; taking various components proportionally; addingsodium alcohol ether sulphate with EO number being 3 at first; and then adding nano SiO2 particle dispersion liquid, and stirring uniformly to obtain a natural gas foam system. The surface-modified positively charged nano SiO2 and the sodium alcohol ether sulphate as a negative-nonionic surfactant with the EO number being 3 have remarkable synergistic effect, the natural gas foaming ability can be improved, the natural gas foam stability can be greatly enhanced, and application of the natural gas foam system in tertiary oil recovery of oil-gas field development is greatly promoted.

Description

Technical field [0001] The invention relates to the field of oil field chemistry, in particular to a natural gas foam foam stabilizer system and a preparation method thereof. Background technique [0002] At present, in the development process of oilfields in my country, gas flooding is one of the commonly used enhanced oil recovery techniques. However, due to the higher gas mobility and the heterogeneity of the oil reservoir, the phenomenon of viscous fingering is prone to occur, which leads to relatively high oil recovery. The low sweep coefficient has limited effectiveness in enhancing oil recovery. As a gas-liquid two-phase mixed fluid, foam tends to show high apparent viscosity in formations. Moreover, the foam can seal the high-permeability layer and improve the sweep coefficient of the low-permeability layer; it will burst when encountering oil, and be stable when encountering water, and it has the performance of selectively blocking oil and water. Therefore, in the case ...

Claims

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Application Information

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IPC IPC(8): C09K8/594C09K8/584
CPCC09K8/584C09K8/594
Inventor 徐龙宫厚健刘晨光邱喆董明哲李亚军朱腾
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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