Method for preventing and treating hydrogen sulphide in thick oil

A technology of hydrogen sulfide and heavy oil, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of hydrogen sulfide not well treated, and achieve cheap raw materials, easy access to raw materials, and good economic effects Effect

Inactive Publication Date: 2008-08-06
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

Therefore, there is no good way to contr

Method used

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Example Embodiment

[0015] Example 1: Lithium carbonate 20%, ammonium bicarbonate 15%, sodium chloride 10%, octylphenol polyoxyethylene ether 5%, water 50%. After the above five substances are mixed uniformly, they are fed into the oil well from the casing to completely eliminate hydrogen sulfide.

Example Embodiment

[0016] Example 2: Lithium carbonate 15%, ammonium bicarbonate 10%, sodium chloride 10%, octylphenol polyoxyethylene ether 5%, water 60%. After the above-mentioned five substances are mixed uniformly and fed into the oil well from the annular space of the oil jacket, hydrogen sulfide can be completely eliminated.

[0017] This method can quickly and efficiently remove toxic hydrogen sulfide gas, even in oil wellheads with high hydrogen sulfide (4500ppm), the above-mentioned treatment agent is consumed 0.5Kg per ton of crude oil. Calculation). The current market price of the treatment agent is about 10,000 yuan / ton, and a meal of crude oil consumes about 5 yuan, which can reduce hydrogen sulfide gas to below 10 ppm or even zero, which is harmless to humans and the environment.

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Abstract

The invention relates to a prevention process which is used to remove hydrogen sulfide in high-viscosity oil in oil fields, and to remove hydrogen sulfide in high-viscosity oil before exploited before well head. The technical scheme of the process comprises the following two steps, firstly allocating treating agent, adding 5-30% lithium carbonate, 3-25% ammonium acid carbonate, 3-20% sodium chloride and 2-15% octyl phenol polyoxyethylene ether according to the percentage by weight into a container which holds 30-60% water, and stirring and mixing evenly to dissolving completely, thereby obtaining the treating agent, and secondly transferring the treating agent to oil wells from the ring space of oil jacket under the condition of 25 DEG C and 101325MPa, mixing treating agent with high-viscosity oil to react, wherein hydrogen sulfide gas can reduce to 0-10ppm. The process does not need to add other devices, has wonderful economic benefits, and raw material which is used is commercialization product, and is easy to obtain. Hydrogen sulfide gas is removed in well to prevent disperse to the outside of the well and to air, and the agent is used on the high-viscosity exploitation.

Description

technical field [0001] The invention relates to a prevention and control method for eliminating hydrogen sulfide in heavy oil in oil fields and eliminating hydrogen sulfide in heavy oil before the wellhead is produced. Background technique [0002] Hydrogen sulfide is a colorless gas with a specific gravity of 1.1895, heavier than air, and a solubility in water of 0.1mol.dm -3 , the solubility in crude oil is greater than that in water. It is a highly toxic and dangerous gas, when the concentration in the air exceeds 28mg / m 3 People cannot work when it exceeds 1000mg / m 3 , it can cause acute poisoning, resulting in casualties. The heavy oil in the oil field contains a large amount of hydrogen sulfide gas, and the concentration is as high as 4500ppm. With the production of oil, it is released through various methods or at pipeline joints, and is scattered in the depressions around the well site, causing serious casualties. [0003] Another hazard of hydrogen sulfide is t...

Claims

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Application Information

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IPC IPC(8): C09K8/528
Inventor 李洪建尹忠
Owner SOUTHWEST PETROLEUM UNIV
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