Sulfur dissolving agent for gas field with high sulfur content

A technology of dissolving sulfur agent and high sulfur content, which is applied in the directions of drilling compositions, chemical instruments and methods, etc., can solve the problems of high cost of dissolving sulfur agent, poor sulfur dissolving effect, unstable performance, etc. Fast speed, reducing poisoning effect, and the effect of large amount of dissolved sulfur

Active Publication Date: 2013-07-31
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of high cost, poor sulfur dissolving effect and unstable performance of the sulfur dissolving agent in the prior art, the present invention provides a sulfur dissolving agent used in high sulfur gas fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: Add 90 g of main agent dimethyl disulfide and 0.5 g of catalyst triethylenetetramine into container A, stir evenly at room temperature and let stand for 20 minutes. Add 15 g of ethanol and 5 g of cocatalyst ethanolamine into container B, stir evenly at room temperature, and let stand for 40 minutes. Slowly add the solution in container B to container A, stir evenly at room temperature, and let stand for 10 minutes.

[0032] When used at 30°C, add 100 g of sulfur, the dissolution time is 4.2 minutes, continue to add sulfur, the maximum dissolved sulfur amount reaches 157 g; when used at 80°C, add 100 g of sulfur, the dissolution time is 1.3 minutes, continue to add sulfur, The maximum dissolved sulfur amount reaches 406 g.

[0033] After 240 days at room temperature, when used at 30°C, the maximum dissolved sulfur is 149 g; when used at 80°C, the maximum dissolved sulfur is 418 g.

Embodiment 2

[0034] Example 2: Add 65 g of main ingredients dimethyl disulfide and 20 g of diphenyl disulfide and 1 g of catalyst triethanolamine into container A, stir evenly at room temperature and let stand for 20 minutes. Add 10 g of ethanol and 6 g of cocatalyst ethanolamine into container B, stir evenly at room temperature, and let stand for 45 minutes. Slowly add the solution in container B to container A, stir evenly at room temperature, and let stand for 15 minutes. When using at 30°C, add 100 g of sulfur, the dissolving time is 6.4 minutes, continue to add sulfur, the maximum dissolved sulfur amount is 154 g; when using at 80°C, add 100 g of sulfur, the dissolving time is 1.6 minutes, continue to add sulfur, The maximum dissolved sulfur amount reaches 346 g.

[0035] After being placed at room temperature for 240 days, the maximum dissolved sulfur amount is 146 g when used at 30°C; the maximum dissolved sulfur amount is 338 g when used at 80°C.

Embodiment 3

[0036] Example 3: Add 80 g of main agent diphenyl disulfide and 0.8 g of catalyst diethylenetriamine into container A, stir evenly at room temperature and let stand for 20 minutes. Add 15 g of ethanol above 98% and 6 g of cocatalyst ethanolamine into container B, stir evenly at room temperature, and let stand for 45 minutes. Slowly add the solution in container B to container A, stir evenly at room temperature, and let stand for 15 minutes. When used at 30°C, add 20 g of sulfur, the dissolution time is 7.2 minutes, continue to add sulfur, the maximum dissolved sulfur amount is 105 g; when used at 80°C, add 20 g of sulfur, the dissolution time is 1.8 minutes, continue to add sulfur, The maximum dissolved sulfur amount reaches 252 g.

[0037] After 240 days at room temperature, when used at 30°C, the maximum dissolved sulfur amount is 102 g; when used at 80°C, the maximum dissolved sulfur amount is 231 g.

[0038] The data of the comparative examples and the examples show that...

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PUM

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Abstract

The invention discloses a sulfur dissolving agent for a gas field with high sulfur content, and a main agent is a disulfide in the structure as shown in general formula R-S-S-R, wherein R is selected from one of alkyl, aralkyl, hydroxyalkyl or phenyl containing 1-12 carbon atoms, a catalyst adopts organic amine, a cocatalyst adopts Lewis base, and a stabilizer adopts organic alcohol. The sulfur dissolving agent is good in sulfur dissolving effect, stable in performances and low in cost, and can be widely used for relieving sulfur sedimentation blockage in well bores of gas wells with high sulfur content, ground pipelines, valves, screen meshes and the like.

Description

technical field [0001] The invention relates to a sulfur dissolving agent, in particular to a sulfur dissolving agent used in high-sulfur gas fields. Background technique [0002] In highly sour gas wells, elemental sulfur is dissolved in sour natural gas in the form of polysulfides. When the gas well is exploited, due to the decrease in temperature and pressure, the amount of dissolved elemental sulfur in the gas will also decrease, and supersaturated sulfur will be precipitated. . After elemental sulfur is deposited, it will block pipelines and downstream equipment, hinder normal production, and even make the entire gas well unavailable. The presence of elemental sulfur can also combine with H 2 S, CO 2 And so on, cause serious corrosion of the production system. Therefore, in addition to taking certain measures to avoid elemental sulfur deposition during the mining process, sulfur solvents are generally used to dissolve and separate sulfur from the elemental sulfur t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/532
Inventor 李林辉鲜宁李科杜磊上官昌淮赵华莱施岱艳
Owner BC P INC CHINA NAT PETROLEUM CORP
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