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A hydrogen sulfide absorbent for pickling and its application method

A technology of hydrogen sulfide and absorbent, applied in chemical instruments and methods, separation methods, separation of dispersed particles, etc., can solve problems such as limited deck space, inapplicability to widespread promotion and use, and increased operating costs, achieving a wide range of applications, Eliminate reservoir pollution damage, strong applicability

Active Publication Date: 2021-07-20
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the oil and gas treatment equipment on the ground is used to absorb hydrogen sulfide gas, the platform deck space will be limited, and the operation cost will be greatly increased, so it is not suitable for widespread use

Method used

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  • A hydrogen sulfide absorbent for pickling and its application method
  • A hydrogen sulfide absorbent for pickling and its application method
  • A hydrogen sulfide absorbent for pickling and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 1) Connect the experimental device according to Figure 1;

[0051] 2) Open the caps of reaction bottle 1 and absorption bottle 2;

[0052] 3) Weigh 4.0g of pickling solution composed of ammonium chloride, urotropine, hydroxyalkyl triazine, ammonium persulfate and tetrasodium iminodisuccinate in a mass ratio of 37:37:18:1:7 The hydrogen sulfide absorbent is put into the reaction flask, and its mass volume ratio to the acid solution is 2.0g / 100mL; 1.0g of imidazoline acidification corrosion inhibitor is weighed and put into the reaction flask, and its mass volume ratio to the acid solution is 0.5g / 100mL; put 400mL of 200g / L sodium hydroxide solution into the absorption bottle to absorb the hydrogen sulfide gas overflowing from the reaction bottle;

[0053] 4) Measure 200mL of a compound organic acid solution containing 7.5% citric acid and 7.5% sulfamic acid by mass and inject it into reaction flask 1;

[0054] 5) Weigh 0.2 g of the downhole scale sample containing ferr...

Embodiment 2

[0062] 1) Connect the experimental device according to Figure 1;

[0063] 2) Open the caps of reaction bottle 1 and absorption bottle 2;

[0064] 3) Weigh 4.0 g of ammonium chloride, urotropine, hydroxyalkyl triazine, potassium persulfate and trisodium nitrilotriacetate in a mass ratio of 37:37:18:1:7 for pickling hydrogen sulfide Put the absorbent into the reaction bottle, and its mass volume ratio to the acid solution is 2.0g / 100mL; weigh 1.6g of aldehyde, ketone, and amine acidification corrosion inhibitors and put it into the reaction bottle, and its mass volume ratio to the acid solution is 0.8 g / 100mL; put 400mL of 200g / L sodium hydroxide solution in the absorption bottle to absorb hydrogen sulfide gas overflowing from the reaction bottle;

[0065] 4) Measure 200mL of a compound organic acid solution containing 10% citric acid and 5% sulfamic acid by mass and inject it into reaction flask 1;

[0066] 5) Weigh 0.2 g of the downhole sulfur-containing scale sample and put...

Embodiment 3

[0074] 1) Connect the experimental device according to Figure 1;

[0075] 2) Open the caps of reaction bottle 1 and absorption bottle 2 shown in the figure;

[0076] 3) Weigh 0.2g of analytically pure ferrous sulfide and put it into the reaction flask;

[0077] 4) Weigh 4.0 g of ammonium chloride, urotropine, hydroxyalkyl triazine, sodium persulfate and ethylenediamine tetraacetate in a mass ratio of 37:37:18:1:7 for pickling Put the hydrogen sulfide absorbent into the reaction bottle, and its mass-volume ratio to the acid solution is 2.0g / 100mL; weigh 2.0g of aldehyde, ketone, and amine acidification corrosion inhibitors and put it into the reaction bottle, and its mass-volume ratio to the acid solution 1.0g / 100mL; Figure 2 - Put 400mL of 200g / L sodium hydroxide solution in the absorption bottle to absorb hydrogen sulfide gas overflowing from the reaction bottle;

[0078] 5) Measure 200 mL of hydrochloric acid solution with a mass concentration of 10% and inject it into rea...

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Abstract

The invention discloses a hydrogen sulfide absorbent for pickling and its use method. The hydrogen sulfide absorbent for pickling is composed of the following components in terms of mass ratio: ammonium chloride: urotropine: hydroxyalkyl triazine : peroxide: complexing agent = 37: 37: 18: 1: 7. The absorbent can absorb the hydrogen sulfide gas component produced by the dissolution of inorganic scale containing sulfide through reaction during the pickling process of the wellbore or pipeline, prevent the overflow and dispersion of the hydrogen sulfide gas component, and solve the problem of sulfide in the pickling process. Hydrogen damage problem.

Description

technical field [0001] The invention relates to a hydrogen sulfide absorbent for pickling and a use method thereof, in particular to a hydrogen sulfide absorbent for pickling of sulfide-containing inorganic scales such as well bores, pipelines and well bottoms in the petroleum production process and a use method thereof. Background technique [0002] In the production process of Bohai Oilfield, due to the presence of a certain amount of hydrogen sulfide gas or the action of sulfate-reducing bacteria (SRB), surface process pipelines and downholes are prone to clogging of ferrous sulfide scale deposition, which affects the normal production of the oilfield. Pickling is a commonly used descaling measure. During pickling operation, one or several acid solutions or acid mixtures are injected into the formation, and the descaling is accompanied by a chemical reaction: FeS+2H + → Fe 2+ +H 2 S↑. Among them, S element mainly comes from ferrous sulfide scale deposits, and ferrous s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14
Inventor 方培林易飞邢四骏郭海军王涛权宝华杨凯林文兴王冬樊虹任强
Owner CHINA NAT OFFSHORE OIL CORP
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