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Method for treating hydrogen sulfide by intensifying activity of indigenous microorganism

A hydrogen sulfide and chloride technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as poor effect, human injury, environmental pollution, etc. adaptable effect

Active Publication Date: 2008-07-30
无棣鑫岳化工集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, long-term use of fungicides is likely to pollute the environment and cause human injury. At the same time, due to the emergence of drug resistance, the effect is getting worse and worse.
Some people also used oxygenation in water injection to inhibit the growth of sulfate-reducing bacteria, but it caused many negative effects, such as oxygen corrosion, etc., and it is no longer used in oil fields.

Method used

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  • Method for treating hydrogen sulfide by intensifying activity of indigenous microorganism
  • Method for treating hydrogen sulfide by intensifying activity of indigenous microorganism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: preparation hydrogen sulfide inhibitor

[0032] Get 80 kilograms of polyaspartic acid, 8 kilograms of glycerol, 160 kilograms of potassium chloride, 80 kilograms of ammonium chloride, 40 kilograms of protease, 8 kilograms of beef powder, and 4 kilograms of sodium magnesium ethylenediaminetetraacetic acid are placed in a reaction kettle and mixed. Add 620 kg of deionized water, fully stir and dissolve, and make a hydrogen sulfide water-soluble activation system.

[0033] Take 100 kg of magnesium nitrate, 80 kg of hydrogen sulfide water-soluble activation system, and 820 liters of deionized water, put them in a reaction kettle, stir at a speed of 60r / min for 1 hour until all are dissolved and mixed, and the hydrogen sulfide inhibitor is obtained .

Embodiment 2

[0034] Embodiment 2: preparation hydrogen sulfide inhibitor

[0035] Get 8 kilograms of glycerol, 245 kilograms of potassium chloride, 82 kilograms of protease, 8 kilograms of ground beef, 4 kilograms of edetate sodium magnesium salt, 653 kilograms of deionized water, and make hydrogen sulfide water-soluble activation according to the method of embodiment 1 system.

[0036] Take 150 kg of nitrate and 100 kg of hydrogen sulfide water-soluble activation system; add 750 kg of deionized water, and fully stir according to the method of the embodiment to make a hydrogen sulfide inhibitor.

Embodiment 3

[0038] The method of the invention has been field tested on two platforms of CH Oilfield of CNOOC.

[0039] 1. Hydrogen sulfide pollution in CH oilfield

[0040] The CH oil field has been exploited for more than 20 years. In the early stage of medium and low water-cut oil recovery, no hydrogen sulfide and sulfate-reducing bacteria pollution problems were found. With the beginning of the later stage of high water-cut oil recovery, due to water injection and frequent workover operations, The stratum was polluted by acidification, resulting in serious pollution problems of hydrogen sulfide and sulfate reducing bacteria. In 2004, it was detected that the gas contained hydrogen sulfide in the wellhead of a single well and the main equipment of the production system; the highest content of hydrogen sulfide on the CH-1 platform reached 1221.8 ppm, the highest content of hydrogen sulfide on the CH-2 platform also exceeds 500ppm. Subsequently, our company tracked and detected the cont...

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Abstract

The invention discloses a method for treating the hydrogen sulfide by strengthening the origin microbial activity, including the following steps: 1) A basic property test and a nitrate reducing test are carried out to the bacteria in the oilfield water. 2) The nitrate reducing positive test is carried out to the oilfield water for determining whether the oilfild water contains the nitrate reducing bacteria or not. 3) A hydrogen sulfide inhibitor and positive iron fungicide are added. The components and the weight percentage of the hydrogen sulfide inhibitor are that a nitrate is 10 to 45 percent, a hydrogen sulfide solution activation system 8 to 10 percent and water 45 to 80 percent. The hydrogen sulfide solution activation system is prepared by taking at least more than five components from poly-aspartic acid, a glycerol, a chloride, a protease, a protein matrix and edta sodium magnesium salt to dissolve into an ionic water for preparing a solution with a weight percent concentration of 35-40 percent. The poly-aspartic acid, a glycerol, a chloride, a protease, a protein matrix and edta sodium magnesium salt exist a certain weight percent relation with each other.

Description

technical field [0001] The invention relates to a method for strengthening the activity of original microorganisms to treat hydrogen sulfide, which belongs to the technology of hydrogen sulfide treatment in oil and gas fields. Background technique [0002] Hydrogen sulfide (H 2 S) is a colorless, highly toxic, strongly acidic gas with a toxicity similar to that of cyanide. Hydrogen sulfide is often produced in oil reservoirs due to biological action, thermochemical action and other causes. It is not only fatal to the human body, but also severely corrosive to the steel of equipment in oil and gas fields. The corrosion caused by it will cause downhole pipe strings to fall, ground equipment, manifolds, instruments, and wellhead devices to rupture, resulting in serious blowouts or fire accidents occur. The presence of hydrogen sulfide also indirectly causes scaling and blockage of oil reservoirs and pipeline equipment, which will increase the cost of sulfur removal in downst...

Claims

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Application Information

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IPC IPC(8): C02F3/00
Inventor 付瑞琴赵秀兰
Owner 无棣鑫岳化工集团有限公司
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