Chemical oil displacement agent

A technology for chemical oil displacement and oil displacement agent, which is applied in the development of fluids, wellbore/well components, earth-moving drilling, etc., can solve the problems of destroying the integrity of the original formulation system, disappearing of ultra-low interfacial tension, and chromatographic separation, etc. Achieving excellent interfacial tension, overcoming the decline of oil displacement efficiency and improving oil recovery

Inactive Publication Date: 2005-11-16
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

In addition, in ASP flooding in oilfields, surfactants mostly use mixed components. Due to the difference in properties between components, there is a phenomenon of chromatographic separation in th

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] Implementation mode one:

[0015] Test instrument: TX-500C full-scale automatic dynamic spinning drop interfacial tension meter;

[0016] Temperature: 70℃;

[0017] Oil: experimental standard crude oil;

[0018] Water: Formation mineralized water (salt content 8000mg·l -1 );

[0019] Inorganic nano powder: SiO 2 ;

[0020] Oil displacement system: prepare 100ml of active water with modified SiO 2 0.5g powder, 0.5g petroleum sulfonate, the balance is mineralized water;

[0021] Interfacial tension: 3.8×10 -3 mN·m -1 .

Example Embodiment

[0022] Implementation mode two:

[0023] Test instrument: TX-500C full-scale automatic dynamic spinning drop interfacial tension meter;

[0024] Temperature: 70℃;

[0025] Oil: experimental standard crude oil;

[0026] Water: Formation mineralized water (salt content 8000mg·l -1 );

[0027] Inorganic nano powder: S 1 O 2 ;

[0028] Oil displacement system: prepare 100ml of active water with modified SiO 2 0.4g powder, 0.6g petroleum sulfonate, and the balance is mineralized water;

[0029] Interfacial tension: 3.2×10 -3 mN·m -1 .

Example Embodiment

[0030] Implementation mode three:

[0031] Test instrument: TX-500C full-scale automatic dynamic spinning drop interfacial tension meter;

[0032] Temperature: 70℃;

[0033] Oil: experimental standard crude oil;

[0034] Water: Formation mineralized water (salt content 8000mg·l -1 );

[0035] Inorganic nano powder: TiO 2 ;

[0036] Oil displacement system: prepare 100ml of active water with modified TiO 2 0.5g powder, 0.5g petroleum sulfonate, the balance is mineralized water;

[0037] Interfacial tension: 2.6×10 -3 mN·m -1 .

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Abstract

A chemical oil-displacing agent without damage to stratum is proportionally prepared from the silane-type coupling agent modified nanoparticles of SiO2, Al2O3, TiO2, or their mixture and the petroleum sulfonate of Na, R, Ca, or ammonium.

Description

technical field [0001] The invention relates to a chemical oil displacement agent, which is suitable for tertiary oil recovery in the petroleum industry. Background technique [0002] Now in China's petroleum industry, many oilfields have experienced the original underground oil injection and water flooding, and the water content of the produced fluid has reached about 90%. According to internationally recognized standards, when the water content reaches 97%, it is unprofitable oil recovery, but At this time, only about 30% of the underground reserves can be recovered. In order to extract more than 70% of the crude oil underground, tertiary oil recovery is required. At present, the application of tertiary oil recovery technology has been widely valued. At the end of waterflood development, residual oil is distributed in the pores of reservoir rocks in a static spherical shape. Reducing interfacial tension is the only way to force the residual oil trapped in porous media to ...

Claims

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Application Information

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Inventor 朱红闫学海
Owner BEIJING JIAOTONG UNIV
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