Thickened oil thermal production well sulfide removing agent and preparation method thereof

A technology for thermal recovery of heavy oil and sulfide, applied in chemical instruments and methods, separation methods, organic chemistry, etc., can solve the problems of no treatment, poor temperature resistance, poor desulfurization effect, etc., achieve less dosage and strong stability Effect

Active Publication Date: 2019-12-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, alcohol amine desulfurizers mainly absorb hydrogen sulfide by alkaline action, which is easy to cause scaling of oil well casing and tubing, and when the pH decreases, the absorbed hydrogen sulfide will be released, and the desulfurization effect is poor; triazines and aldehydes Amine desulfurizers can remove hydrogen sulfide, but they have poor temperature resistance and high cost. The treatment cost of individual oil wells exceeds 5,000 yuan / day, which brings great cost pressure to the production of oil wells
In addition, the above three types of chemicals can only treat hydrogen sulfide, and have no effect on other sulfur-containing odorous gases such as methyl mercaptan

Method used

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  • Thickened oil thermal production well sulfide removing agent and preparation method thereof
  • Thickened oil thermal production well sulfide removing agent and preparation method thereof
  • Thickened oil thermal production well sulfide removing agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 158

[0028] Example 1 58.04

[0029] (1) Add 1 mol of glyoxal to the three-necked flask, put it into a magnetic rotor, place the three-necked flask on a constant temperature water bath with magnetic stirring, and control the temperature of the water bath at 25°C.

[0030] (2) Install 2 separating funnels on the above-mentioned three-necked flask, turn on the magnetic stirring, and the stirring rate is 120rpm.

[0031] (3) Add 4 mol of ammonium salt solution (calculated as ammonia) into the separatory funnel 1, control the dropping rate to 1 mL / min, and continue to stir and react for 0.5 h after the dropping to obtain the intermediate product biimidazole.

[0032] (4) Add 2.902 g of ethanol solution of alkali to the above-mentioned intermediate product biimidazole, add 1mol epichlorohydrin solution in separatory funnel 2, control temperature to be 70 ℃, and the drop rate of epichlorohydrin solution is 4mL / min , react while stirring after dropwise addition, the stirring speed is 200...

Embodiment 2

[0038] (1) Add 1 mol of glyoxal into the three-necked flask, put it into a magnetic rotor, place the three-necked flask on a constant temperature water bath with magnetic stirring, and control the temperature of the water bath at 30°C.

[0039] (2) Install 2 separating funnels on the above-mentioned three-neck flask, turn on the magnetic stirring, and the stirring rate is 150rpm.

[0040] (3) Add 4.6 mol of ammonium salt solution (calculated as ammonia) into the separatory funnel 1, control the dropping rate to 2 mL / min, continue to stir and react for 0.8 h after the dropping, and obtain the intermediate product biimidazole.

[0041] (4) Add 3.500 g of ethanol solution of alkali in the above-mentioned intermediate product biimidazole, add 1.5mol epichlorohydrin solution in separatory funnel 2, control temperature is 72 ℃, the rate of addition of epichlorohydrin solution is 5mL / min, react while stirring after the dropwise addition, the stirring speed is 230rpm, the reaction ti...

Embodiment 3

[0047] (1) Add 1 mol of glyoxal into the three-necked flask, put it into a magnetic rotor, place the three-necked flask on a constant temperature water bath with magnetic stirring, and control the temperature of the water bath at 35°C.

[0048] (2) Install 2 separating funnels on the above-mentioned three-necked flask, turn on the magnetic stirring, and the stirring rate is 180rpm.

[0049] (3) Add 5 mol of ammonium salt solution (calculated as ammonia) into the separatory funnel 1, control the rate of addition to 2 mL / min, continue to stir and react for 1 h after the addition, to obtain the intermediate product biimidazole.

[0050] (4) Add 4.643 g of ethanol solution of alkali to the above-mentioned intermediate product biimidazole, add 2mol epichlorohydrin solution in separatory funnel 2, control temperature to be 75 ℃, and the drop rate of epichlorohydrin solution is 6mL / min , react while stirring after dropwise addition, the stirring speed is 300rpm, the reaction time is ...

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Abstract

The invention belongs to the technical field of chemical agents for oil fields, and preparation thereof, and particularly relates to a thickened oil thermal production well sulfide removing agent anda preparation method thereof. The sulfide removing agent is formed by compounding epoxypropyl biimidazole with nitrate, and comprises, by mass, 10-20% of the epoxypropyl biimidazole, 5-10% of the nitrate, and the balance of water, and the epoxypropyl biimidazole is formed by reacting glyoxal, an ammonium salt solution (by ammonia) and epoxy chloropropane according to a molar ratio of 3:(4-5):(1-2). The sulfide removing agent can effectively remove hydrogen sulfide in an oil well, and also can effectively remove harmful sulfides such as methyl mercaptan, ethyl mercaptan and carbonyl sulfide; and the sulfide removing agent has a small dosage, and the dosage of the sulfide removing agent is 40% or above less than that of a triazine agent in the oil well shaft environment.

Description

technical field [0001] The invention belongs to the technical field of chemical agents for oil fields and their preparation, and in particular relates to a sulfide remover for heavy oil thermal recovery wells and a preparation method thereof. Background technique [0002] my country is relatively rich in heavy oil resources, and thermal recovery of heavy oil, as a means of heavy oil, super heavy oil, and ultra-super heavy oil, makes heavy oil reservoirs effectively produced. During the process of huffing and puffing and thermal flooding of heavy oil with high-temperature hot steam, the sulfur-containing compounds in crude oil will undergo a series of hydrothermal cracking reactions to produce hydrogen sulfide (some wells will produce methyl mercaptan, ethyl mercaptan, carbonyl sulfide and other sulfur-containing compounds), the concentration of hydrogen sulfide at the wellhead of some thermal drive wells in the eastern oil region is as high as 30000-50000mg / m 3 , a serious ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524C09K8/532C09K8/528C07D405/14B01D53/00
CPCC09K8/524C09K8/532C09K8/528C07D405/14B01D53/00C09K2208/20B01D2257/306B01D2257/308B01D2257/304
Inventor 张守献袁长忠王冠张春伟岳胜辉于丹丹潘永强冯逸茹徐鹏曹嫣镔
Owner CHINA PETROLEUM & CHEM CORP
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