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Biological inhibition method and system of hydrogen sulfide gas in oil gathering system

A gathering and transportation system, bio-suppression technology, applied in gas/liquid distribution and storage, pipeline systems, mechanical equipment, etc., can solve the problems of temporary but not permanent, environmental pollution, and the treatment effect can only be maintained for a certain period of time, to achieve the elimination of safety. hidden dangers, improve the working environment, reduce the effect of corrosion

Active Publication Date: 2013-05-22
SHAANXI URSTAR ENVIRONMENTAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above three types of technologies are hydrogen sulfide gas control technologies, but these three technologies have their limitations
Although the first technology can kill sulfate-reducing bacteria in a short period of time, it will cause environmental pollution and cause drug resistance of sulfate-reducing bacteria; the second technology, although it will not pollute the environment, will treat the symptoms but not the root cause, and the treatment effect can only be maintained A certain period of time; the third technology, although inhibiting the production of sulfate-reducing bacteria, cannot quickly increase the number of denitrifying bacteria, and cannot quickly reduce the number of sulfate-reducing bacteria in the gathering system

Method used

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  • Biological inhibition method and system of hydrogen sulfide gas in oil gathering system
  • Biological inhibition method and system of hydrogen sulfide gas in oil gathering system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Take the Aijiawan operating area of ​​Changqing Oilfield as an example. The average concentration of hydrogen sulfide in a single well in the operation area is 260mg / m 3 , the concentration of hydrogen sulfide at the oil transfer station is 263mg / m 3 , the concentration of hydrogen sulfide in the joint station is 5788mg / m 3 .

[0049] Such as figure 1 as shown,

[0050] (1) Single well dosing. After calculation, add 60g of embedding pellets to single well 3, after standing for 24 hours, add 100mg / L sodium nitrite corrosion inhibitor, and add 30L MDEA desulfurizer.

[0051] (2) Suppression of oil transfer stations. Add 50g of synchronous desulfurization and denitrification embedding pellets to oil transfer station 2, add 100mg / L sodium nitrite after 24 hours; add 20L1moL / L NaOH solution;

[0052](3) Combined station suppression. Add 100g of synchronous desulfurization and denitrification embedding pellets to joint station 1, and add 100mg / L sodium nitrite after 2...

Embodiment 2

[0055] Take the Pengyang operation area of ​​Changqing Oilfield as an example. The average hydrogen sulfide concentration of a single well in the operation area is 310mg / L, and the hydrogen sulfide concentration at the oil transfer station is 410mg / m 3 , the concentration of hydrogen sulfide in the joint station is 3107mg / m 3 .

[0056] Such as figure 1 as shown,

[0057] (1) Single well dosing. After calculation, add 60g of embedding pellets to single well 3, after standing for 24 hours, add 100mg / L sodium nitrite corrosion inhibitor, and add 30L MDEA desulfurizer.

[0058] (2) Suppression of oil transfer stations. Add 50g of synchronous desulfurization and denitrification embedding pellets to oil transfer station 2, add 100mg / L sodium nitrite after 24 hours; add 20L1moL / L NaOH solution;

[0059] (3) Combined station suppression. Add 100g of synchronous desulfurization and denitrification embedding pellets to joint station 1, and add 100mg / L sodium nitrite after 24 hou...

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Abstract

Provided is a biological inhibition method of hydrogen sulfide gas in an oil gathering system. The biological inhibition method of hydrogen sulfide gas is further applied in a single well, an oil transfer station, and an oil conveying station in the oil gathering system. Each station is provided with corresponding different dosing methods and detection methods. The invention further provides a biological inhibition system of hydrogen sulfide gas in the oil gathering system. The biological inhibition system of hydrogen sulfide gas in the oil gathering system comprises measuring containers containing synchronous desulfurization and denitrification embedding balls, sodium nitrite, methyldiethanolamine (MDEA) desulfurizer, and NaOH solution, and a singlechip. Each outlet of the measuring containers is provided with a valve, the singlechip controls the starting time of corresponding magnetic valves according to control signals outputted by an arranged-in timer unit, drug delivery amount is controlled by time, and corresponding drug delivery combination is chosen through a pre-set program to realize automatic drug delivery. According to the biological inhibition method and the system of hydrogen sulfide gas in the oil gathering system, each link of hydrogen sulfide generated from sulfate reducting bacteria in the gathering system is controlled to improve working environment of a crude oil gathering system workplace, and the biological inhibition method and the system of hydrogen sulfide gas in the oil gathering system are of great social, environmental, and economic benefits.

Description

technical field [0001] The invention relates to a biological inhibition technology for secondary hydrogen sulfide in crude oil gathering and transportation systems, belongs to the field of toxic and harmful gas treatment in oil and gas fields, and in particular relates to a biological inhibition method for secondary hydrogen sulfide gas in oil gathering and transportation systems. Background technique [0002] As far as the petroleum industry is concerned, H 2 The distribution of S gas is very wide, which is extremely harmful to the life safety and personal health of employees. When the concentration of hydrogen sulfide is high (50-200ppm), the oxygen in the blood will be taken away, and the human body organs will be poisoned due to lack of oxygen; when the concentration is extremely high (700-2000ppm), it will only take a few seconds for the human body to Lose self-rescue ability, if not rescued in time will die. High concentrations of hydrogen sulfide gas can also cause ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17D3/12
Inventor 金鹏康赵楠李岩周立辉任建科
Owner SHAANXI URSTAR ENVIRONMENTAL SCI & TECH
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