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Removal agent of sulfur-containing odorous gas of thickened oil thermal production well and preparation method of removal agent

A technology for thermal recovery and removal of heavy oil, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of decreased chemical effect, accelerated decomposition of triazines, etc., and achieves low pH value and stable performance. Strong, low-dose effect

Active Publication Date: 2019-01-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the decomposition rate of triazines increases with the decrease of pH value, the effect of the agent decreases with the extension of storage period

Method used

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  • Removal agent of sulfur-containing odorous gas of thickened oil thermal production well and preparation method of removal agent
  • Removal agent of sulfur-containing odorous gas of thickened oil thermal production well and preparation method of removal agent
  • Removal agent of sulfur-containing odorous gas of thickened oil thermal production well and preparation method of removal agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) In the three-necked flask, successively add reaction medium water, 1,3,5-trihydroxyethylhexahydro-s-triazine, and ammonia-hydroxyl complexing agent, and then fix the three-necked flask on an electric heating mantle with a magnetic stirrer superior;

[0027] (2) Put the magnetic rotor into the three-necked bottle, and then install the temperature controller and the separating funnel in the three-necked bottle;

[0028] (3) Turn on the magnetic stirring, the stirring rate is 60rpm, heat the substance in the there-necked flask through the electric heating mantle, and the temperature is controlled by the thermostat at 30°C;

[0029] (4) Add peroxide hydrogen peroxide into the separatory funnel at a rate of 5 drops / min, and react for 0.5h after the addition is completed to obtain the removal agent A 1 .

[0030] The 1,3,5-trihydroxyethylhexahydro-s-triazine, hydrogen peroxide, ammonia hydroxyl complexing agent and water are added in a molar ratio of 1:1:0.01:8.

[003...

Embodiment 2

[0038] (1) In the there-necked bottle, successively add reaction medium water, triazine substance 1,3,5-trihydroxyethylhexahydro-s-triazine, metal complexing agent mercapto complexing agent, then fix the there-necked bottle on the belt On a heating mantle with a magnetic stirrer;

[0039] (2) Put the magnetic rotor into the three-necked bottle, and then install the temperature controller and the separating funnel in the three-necked bottle;

[0040] (3) Turn on the magnetic stirring, the stirring rate is 80rpm, heat the substance in the there-necked flask through the electric heating mantle, and the temperature is controlled by the thermostat at 40°C;

[0041] (4) Add peroxide peracetic acid in the separatory funnel, the addition rate is 6 drops / min, and react for 0.6h after the addition is completed to obtain the removal agent A 2 .

[0042] The 1,3,5-trihydroxyethylhexahydro-s-triazine, peracetic acid, mercapto complexing agent and water are added in a molar ratio of 1:1.5...

Embodiment 3

[0050] (1) In the there-necked flask, successively add reaction medium low-molecular-weight alcohol, triazine substance 1,3,5-trihydroxyethylhexahydro-s-triazine, metal complexing agent ammonia hydroxyl complexing agent, and then the three-necked flask fixed on a heating mantle with a magnetic stirrer;

[0051] (2) Put the magnetic rotor into the three-necked bottle, and then install the temperature controller and the separating funnel in the three-necked bottle;

[0052] (3) Turn on the magnetic stirring, the stirring rate is 100rpm, heat the substance in the there-necked flask through the electric heating mantle, and the temperature is controlled by the temperature controller at 55°C;

[0053] (4) Add peroxide carbamide peroxide in the separatory funnel, the addition speed is 7 drops / min, after the completion of the drop, react for 0.7h to obtain the removal agent A3 .

[0054] The 1,3,5-trihydroxyethylhexahydro-s-triazine, carbamide peroxide, ammonia hydroxyl complexing ag...

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Abstract

The invention belongs to the technical field of chemical agents for oilfields and preparation and in particular relates to a removal agent of sulfur-containing odorous gas of a thickened oil thermal production well and a preparation method of the removal agent. The removal agent is prepared by taking a triazine substance, peroxide and a metal complexing agent to react in a reaction medium, whereinthe triazines substance is hexahydro-1,3,5-tris(hydroxyethyl)-s-triazine or hexahydro-1,3,5-trialkyl-s-triazine; and the peroxide is one of hydrogen peroxide, peroxyacetic acid, urea peroxide and sodium percarbonate. The removal agent provided by the invention has low pH (Potential of Hydrogen) value, so that the problem that a sleeve, an oil pipe and a shaft of an oil well are scaled is not caused; the removal agent provided by the invention can be used for effectively removing undesirable odor caused by H2S hydrogen sulfide and can be used for effectively removing the hydrogen sulfide generated by thiol and carbonyl sulfide; and meanwhile, the removal agent provided by the invention has a small dosage and the dosage can be reduced by 50 percent or more when being compared with that of acommon medicament; and the removal rate on the H2S, the thiol and the carbonyl sulfide of oil well produced liquid reaches 100 percent.

Description

technical field [0001] The invention belongs to the technical field of chemical agents for oilfields and their preparation, and in particular relates to a remover for sulfur-containing odor gas in heavy oil thermal recovery wells and a preparation method thereof. Background technique [0002] my country is rich in heavy oil resources, and the thermal recovery of heavy oil, as an effective means of heavy oil, super heavy oil, and ultra-heavy oil, is increasing year by year in its application scale. During the process of huffing and puffing and thermal flooding of heavy oil with high-temperature hot steam, sulfur-containing compounds in crude oil will undergo a series of hydrothermal cracking reactions to produce hydrogen sulfide, methyl mercaptan, ethanethiol, carbonyl sulfide, sulfide, etc. with odor Sulfur-containing compounds, especially ultra-heavy oil, are injected into steam. After a period of simmering, a large amount of water vapor will be generated in the initial sta...

Claims

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Application Information

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IPC IPC(8): C09K8/532C09K8/524
CPCC09K8/524C09K8/532C09K2208/20
Inventor 张守献袁长忠岳胜辉张岩徐鹏徐闯曹嫣镔宋永亭冯逸茹张吉星
Owner CHINA PETROLEUM & CHEM CORP
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