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Thickened oil cold production agent and preparation method and application thereof

A technology of cold recovery and heavy oil, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor steam huff and puff effect, difficult recovery, clay expansion damage, etc., to improve formation permeability and reduce flow The effect of resistance and reducing the viscosity of heavy oil

Active Publication Date: 2013-09-04
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The production of heavy oil in Liaohe Oilfield accounts for more than 70% of the total production. At present, the main method of heavy oil production in Liaohe Oilfield is steam huff and puff. The effect of steam huff and puff is getting worse and worse. Nearly 26% of the oil wells (6560 heavy oil wells in the whole oil field) lose the economic value of continuing to use steam huff and puff. Because heavy oil is difficult to flow at the temperature of the reservoir, it is not easy to be recovered, and the huff and puff Various blockages caused by the oil layer during the process, the production effect is very poor
In order to improve the effect of steam stimulation, various steam injection additives are used on site, such as dispersant, viscosity reducer, high temperature anti-demulsification, film expander, etc. The agents used on site are far from meeting the actual needs of heavy oil recovery technology
For example, heavy oil diluent, although it can dissolve asphalt and colloid, reduce the viscosity of heavy oil, but it has no effect on the damage caused by steam huffing and puffing; The damage produced during the process of huffing and puffing has no effect, but it is easy to cause emulsion blockage to the reservoir and cause clay swelling damage

Method used

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  • Thickened oil cold production agent and preparation method and application thereof
  • Thickened oil cold production agent and preparation method and application thereof
  • Thickened oil cold production agent and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Example 1 (crude oil viscosity 2000-10000mPa·s, formation water salinity 1500-15000mg / l)

[0057] Synthesize 10m 3 Example of heavy oil cold recovery agent solution.

[0058] Mass ratio between agents: nickel sulfamate: palmitic acid: chelating dispersant: sulfonate dispersant = 3:2:3:2;

[0059] 1. Quantitatively prepare each reagent according to the ratio of the medicine;

[0060] 2. to 10m 3 Add 6.0m to the power mixing tank 3 tap water;

[0061] 3. Accurately weigh 1200kg of nickel sulfamate, add it evenly into the mixing tank under constant stirring (60 rpm) (adding speed 10kg / min), raise the temperature of the mixing tank to 80°C, and continue stirring for 45 minutes;

[0062] 4. Accurately weigh 800kg of palmitic acid, evenly add it into the mixing tank in step 3 under constant stirring (45 rpm) (adding speed 10kg / min), and continue stirring for 30 minutes;

[0063] 5. Accurately weigh 1200kg of chelating dispersant, and evenly add it into the mixing tank i...

Embodiment 2

[0070] Example 2 (crude oil viscosity 10000-35000mPa·s, formation water salinity 1500-15000mg / l)

[0071] Synthesize 10m 3 Example of heavy oil cold recovery agent solution.

[0072] Chemical ratio: nickel sulfamate: palmitic acid: chelating dispersant: sulfonate dispersant = 3.25: 1.75: 3.25: 1.75;

[0073] 1. Quantitatively prepare each reagent according to the ratio of the medicine;

[0074] 2. to 10m 3 Add 5m to the power mixing tank 3 tap water;

[0075] 3. Accurately weigh 1300kg of nickel sulfamate, add it evenly into the mixing tank under constant stirring (60 rpm) (adding speed 10kg / min), raise the temperature of the mixing tank to 80°C, and continue stirring for 45 minutes;

[0076] 4. Accurately weigh 700kg of palmitic acid, add it evenly into the mixing tank in step 3 under constant stirring (45 rpm) (adding speed 10kg / min), and continue stirring for 30 minutes;

[0077] 5. Accurately weigh 1300kg of chelating dispersant, evenly add it into the mixing tank in...

Embodiment 3

[0083] Example 3 (crude oil viscosity 35000-100000mPa·s, formation water salinity 1500-15000mg / l)

[0084] Synthesize 10m 3 Example of heavy oil cold recovery agent solution.

[0085] Agent ratio: nickel sulfamate: palmitic acid: chelating dispersant: sulfonate dispersant = 3.5: 1.5: 3.5: 1.5;

[0086] 1. Quantitatively prepare each reagent according to the ratio of the medicine;

[0087] 2. to 10m 3 Add 4.5m to the power mixing tank 3 tap water;

[0088] 3. Accurately weigh 1400kg of nickel sulfamate, add it evenly into the mixing tank under constant stirring (60 rpm) (adding speed 10kg / min), raise the temperature of the mixing tank to 80°C, and continue stirring for 45 minutes;

[0089] 4. Accurately weigh 600kg of palmitic acid, evenly add it into the mixing tank in step 3 under constant stirring (45 rpm) (adding speed 10kg / min), and continue stirring for 30 minutes;

[0090] 5. Accurately weigh 1400kg of chelating dispersant, add evenly into the mixing tank in step 4...

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Abstract

The invention relates to a thickened oil cold production agent and a preparation method and an application thereof. The cold production agent is prepared from the following components in percent by mass: 10-15 percent of nickel aminosulfonate, 6-10 percent of palmitic acid, 10-15 percent of chelating disperse agent, 6-10 percent of sulfonate disperse agent and the balance of water. According to the cold production agent, the formation thickened oil cold production is realized under the steam injection-free conditions by utilizing the technical characteristics of the cold production agent.

Description

technical field [0001] The invention relates to a heavy oil cold recovery agent, its preparation method and application. Background technique [0002] The production of heavy oil in Liaohe Oilfield accounts for more than 70% of the total production. At present, the main method of heavy oil production in Liaohe Oilfield is steam huff and puff. The effect of steam huff and puff is getting worse and worse. Nearly 26% of the oil wells (6560 heavy oil wells in the whole oil field) lose the economic value of continuing to use steam huff and puff. Because heavy oil is difficult to flow at the temperature of the reservoir, it is not easy to be recovered, and the huff and puff Various blockages caused by the oil layer during the process, the production effect is very poor. In order to improve the effect of steam stimulation, various steam injection additives are used on site, such as dispersant, viscosity reducer, high temperature anti-demulsification, film expander, etc. The agent...

Claims

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Application Information

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IPC IPC(8): C09K8/592
Inventor 张玉涛刘喜林张洪君王浩龙华岳玉全马春宝向延安韩松蔡德军王晓东赵剑飞王楠刘广友谢冰晰张西子冯广慧孙睿郭振鹏王振军陈骑冲陈莹
Owner PETROCHINA CO LTD