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Pickling hydrogen sulfide absorbent for and using method thereof

A hydrogen sulfide and absorbent technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve problems such as increasing operating costs, not being suitable for widespread use, and limited deck space, achieving strong applicability, Eliminate reservoir pollution damage and use a wide range of effects

Active Publication Date: 2019-05-21
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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  • Pickling hydrogen sulfide absorbent for and using method thereof
  • Pickling hydrogen sulfide absorbent for and using method thereof
  • Pickling hydrogen sulfide absorbent for and using method thereof

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 pickling hydrogen sulfide absorbent and a using method thereof. The pickling hydrogen sulfide absorbent comprises ammonium chloride, urotropine, hydroxyalkyl triazine, peroxide and a complexing agent according to a mass ratio of 37:37:18:1:7. The absorbent is used to absorb the hydrogen sulfide gas, generated after dissolving inorganic scales containing sulfides, througha reaction in the shaft or pipeline pickling process to prevent the hydrogen sulfide gas from overflowing and dispersing and solve the hydrogen sulfide damage problem in the pickling working process.

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 Applications(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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