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Hydrogen sulfide treating agent for oil fields and method for treating hydrogen sulfide

A technology of hydrogen sulfide and treatment agent, which is applied in the direction of chemical instruments and methods, earth drilling, and drilling compositions, etc. It can solve the problems of fire or explosion, inability to completely kill sulfate-reducing bacteria, and high cost, and achieve the goal of inhibiting active effect

Inactive Publication Date: 2011-08-17
E TECH ENERGY TECH DEV CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The general method of treating biogenic hydrogen sulfide is to use fungicides, which are costly and cannot completely kill sulfate-reducing bacteria, which can easily cause bacteria to develop drug resistance
However, the method of controlling abiotic hydrogen sulfide is usually to use chemical desulfurizers. This method can only treat the symptoms, not the root cause, and cannot solve the problem of hydrogen sulfide output. Moreover, some chemical desulfurizers are expensive and have the risk of fire or explosion. Oilfield safety production creates new hidden dangers

Method used

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  • Hydrogen sulfide treating agent for oil fields and method for treating hydrogen sulfide
  • Hydrogen sulfide treating agent for oil fields and method for treating hydrogen sulfide
  • Hydrogen sulfide treating agent for oil fields and method for treating hydrogen sulfide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preparation of hydrogen sulfide treatment agent: Take 80 kg of polyaspartic acid, 10 kg of glycerin, 50 kg of protease, 10 kg of beef powder, 5 kg of sodium magnesium edetate, 160 kg of potassium chloride, 10 kg of ferric chloride, 2.5 kg of manganese sulfate, 2.5 kg of zinc sulfate, 2 kg of copper sulfate, 15 kg of sodium molybdate, 4 kg of cobalt chloride and 5 kg of nickel chloride, 1.5 kg of vitamin B5, 1.5 kg of microbial B12 and 1 kg of D-biotin, Mix in a reaction kettle, add 640 kg of deionized water, fully stir and dissolve, and make a water-soluble microbial activation system.

[0040] Take 150 kilograms of calcium nitrate, 100 kilograms of potassium nitrite, 80 kilograms of water-soluble microorganism activation system, take 670 kilograms 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 uniformly, and obtained Hydrogen sulfide treatment agent.

Embodiment 2

[0042] Hydrogen sulfide treatment agent preparation: take 60 kg of polyaspartic acid, 100 kg of protease, 30 kg of beef powder, 150 kg of potassium chloride, 10 kg of ferric chloride, 15 kg of sodium molybdate, 5 kg of cobalt chloride and 5 kg Nickel chloride, 2 kg of vitamin B5 and 2 kg of D-biotin were mixed in a reaction kettle, 621 kg of deionized water was added, fully stirred and dissolved, and a water-soluble microbial activation system was made.

[0043] Take 180 kilograms of calcium nitrate, 90 kilograms of potassium nitrite, 60 kilograms of water-soluble microorganism activation system, and 670 kilograms of deionized water, put them in a reaction kettle, stir at a rotating speed of 60r / min for 1 hour until they are completely dissolved and mixed, and the obtained Hydrogen sulfide treatment agent.

Embodiment 3

[0045] The method of the present invention controls hydrogen sulfide on the CNOOC oilfield platform:

[0046] 1. Hydrogen sulfide pollution status of oilfield platforms

[0047] There is relatively serious hydrogen sulfide pollution in the oil field. Hydrogen sulfide is produced in the early stage of well group production, and the content reaches 500-1000ppm; some well groups also produce hydrogen sulfide with the extension of water injection time, and the content reaches 100-500ppm; Tracking and monitoring of hydrogen sulfide content and sulfate-reducing bacteria content confirmed that the hydrogen sulfide in the oilfield contains both biogenic hydrogen sulfide and non-biogenic hydrogen sulfide.

[0048] 2. Analysis of the structure and properties of the flora

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PUM

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Abstract

The invention relates to a hydrogen sulfide treating agent for oil fields and a method for treating hydrogen sulfide. The invention belongs to the technical field of hydrogen sulfide treatment in oil and gas fields. The hydrogen sulfide treating agent for oil fields is characterized by comprising the following components in percentage by weight: 10 to 45 percent of nitrate, 5 to 50 percent of nitrite, 5 to 10 percent of water soluble microorganism activating system, and 45 to 80 percent of water. The method for treating hydrogen sulfide with the hydrogen sulfide treating agent for oil fields comprises: to treat hydrogen sulfide in oil reservoirs, adding the hydrogen sulfide treating agent into injected water, namely injecting the hydrogen sulfide treating agent into a water pipe according to an injection concentration of 100 to 1,500 mg / L to mix the hydrogen sulfide treating agent with the injected water, and injecting the mixture into a stratum by a water injection pipe; and to treat hydrogen sulfide in a production system, adding the hydrogen sulfide treating agent in produced liquid and gas, namely injecting the hydrogen sulfide treating agent into a production system according to an injection concentration of 100 to 1,500 mg / L to mix the hydrogen sulfide treating agent with the produced liquid and gas. The hydrogen sulfide treating agent has the advantages of treating hydrogen sulfide generated by different factors, improving recovery rate of oil fields, along with convenience for construction, quick effectiveness, low cost, safety, no toxin, environmental friendliness and the like.

Description

technical field [0001] The invention belongs to the technical field of hydrogen sulfide treatment in oil and gas fields, in particular to a hydrogen sulfide treatment agent for oil fields and a method for treating hydrogen sulfide. Background technique [0002] The existence of hydrogen sulfide in oilfields is extremely harmful to the health and life safety of operators and the safe operation of oil facilities; the existence of hydrogen sulfide will also cause formation and pipeline blockage, increase the desulfurization cost of downstream treatment plants, and affect The quality of refined oil. Therefore, solving the problem of hydrogen sulfide is the primary task of safe production in oilfields and an important measure to ensure safe and efficient production in oilfields. [0003] The origin of hydrogen sulfide can be divided into two categories: one is biogenic, which is mainly produced by the metabolic reduction of sulfate by sulfate-reducing bacteria (SRB); the other i...

Claims

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Application Information

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IPC IPC(8): C09K8/528E21B37/06
Inventor 胡欣
Owner E TECH ENERGY TECH DEV CORP
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