Auxiliary enhancement chemical agent for oil extraction with heat

A technology of thermal oil recovery and chemical agents, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as impacts, and achieve the effects of alleviating negative impacts, long timeliness, and wide range of heat injection

Active Publication Date: 2012-08-22
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Looking at all thermal-chemical oil recovery technologies for heavy oil, adding chemical agents can improve the effect of single thermal recovery. The on-site application will be affected to a certain extent, especially in offshore oilfields or remote oilfields on land where transportation convenience, space or load-bearing, on-site safety or chemical agent consumption are limited. In addition, h

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, the preparation of synergistic chemical agent

[0023] Component A: take a degassed heavy oil from an oil field and react with a sodium carbonate-ethanol aqueous solution (wherein, the volume ratio of ethanol and water is 0.25: 1) deacidification agent system to obtain a petroleum salt surfactant solution, wherein the The molar ratio of the deacidifying agent to the acid in the degassed heavy oil is 1.1:1;

[0024] Component B is a mixture of ammonium bicarbonate, ammonium carbonate and sodium bicarbonate; component C is iron oxalate;

[0025] Mix the above-mentioned components A, B and C and stir them evenly to obtain the synergistic chemical agent, wherein the mass percentage of component A is 0.65% based on the petroleum salt surfactant therein, and the component The mass percentage of component B is 5%, and the mass percentage of component C is 0.5%.

Embodiment 2

[0026] Embodiment 2, the preparation of synergistic chemical agent

[0027] Component A: take degassed heavy oil from an oil field and ethanolamine-ethanol aqueous solution (wherein, the volume ratio of ethanol and water is 0.5:1) deacidification agent system is reacted to obtain petroleum salt surfactant solution, wherein the deacidification The molar ratio of the acid agent to the acid in the degassed heavy oil is 1.5:1;

[0028] Component B is a mixture of ammonium bicarbonate, ammonium carbonate and sodium bicarbonate; component C is [Et 3 NH]SnCl 3 ;

[0029] Mix and stir the above component A, component B and component C to obtain the synergistic chemical agent, wherein the mass percentage of component A is 0.8% based on the petroleum salt surfactant therein, and the component The mass percentage of component B is 8%, and the mass percentage of component C is 1.0%.

Embodiment 3

[0030] Embodiment 3, the preparation of synergistic chemical agent

[0031] Component A: take a certain oil field degassed heavy oil and polyvinylamine-ethanol aqueous solution (wherein, the volume ratio of ethanol and water is 0.65: 1) deacidification agent system is reacted to obtain petroleum salt surfactant solution, wherein The mol ratio of the deacidifying agent to the acid in the degassed heavy oil is 1.3:1;

[0032] Component B is a mixture of ammonium bicarbonate, ammonium carbonate and sodium bicarbonate; component C is [Et 3 NH]FeCl 3 ;

[0033] Mix and stir the above-mentioned components A, B and C to obtain the synergistic chemical agent, wherein the mass percentage of component A is 0.7% based on the petroleum salt surfactant therein, and the component The mass percentage of component B is 10%, and the mass percentage of component C is 1.5%.

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Abstract

The invention discloses an auxiliary enhancement chemical agent for oil extraction with heat. The chemical agent comprises component A, component B and component C; the component A is petroleum surfactant solution; petroleum surfactant solution is obtained by the reaction of crude oil and deacidification agent; the component B comprises at least three ingredients of ammonium acid carbonate, ammonium carbonate, sodium hydrogen carbonate, ammonium chloride and sodium nitrite; and the component C is organic metal salt or ionic liquid. The auxiliary enhancement chemical agent for the oil extraction with heat has the following beneficial effects that three components of the auxiliary enhancement chemical agent for the oil extraction with heat are cheap and easy to get, single action of the three components is supplemental with one another and coordinated to make enhancement, self-growing surfactants, gases and catalysts of an oil layer in an adjacent well area can play roles in stages of thickened oil heat injection, well stewing and oil extraction, so that the viscosity is reduced by emulsifying, gas driving and catalyzed modifying of thickened oil, self-growing surfactants and gases generated in a far well area play leading roles, and the viscosity is reduced by dissolved gas expansion of thickened oil or by promoting low-temperature emulsification of thickened oil through generated gases of the oil layer.

Description

technical field [0001] The invention relates to a chemical agent for synergistic recovery of heavy oil, in particular to an auxiliary synergistic chemical agent for thermal oil recovery. Background technique [0002] Heavy oil occupies a relatively large proportion of the world's oil and gas resources. In my country, heavy oil is mainly distributed in oil fields such as Shengli, Liaohe, Henan, Xinjiang and Bohai. At present, the main methods of producing heavy oil are steam flooding and steam stimulation. In the process of conventional steam recovery, due to the difference in density and viscosity between heavy oil and steam, on the one hand, it often leads to steam gravity overlay and fingering, which reduces the volumetric sweep coefficient of steam injection recovery. On the other hand, even in the area affected by steam, due to the influence of the interface characteristics of the rock-oil-water system, a large part of the heavy oil cannot be stripped from the rock surf...

Claims

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Application Information

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IPC IPC(8): C09K8/584C09K8/592C09K8/58
Inventor 崔盈贤向问陶张健赵文森杨光
Owner CHINA NAT OFFSHORE OIL CORP
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