CN107502329B - Eliminating agent for eliminating associated hydrogen sulfide gas in heavy oil thermal recovery - Google Patents
Eliminating agent for eliminating associated hydrogen sulfide gas in heavy oil thermal recovery Download PDFInfo
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- CN107502329B CN107502329B CN201610424261.5A CN201610424261A CN107502329B CN 107502329 B CN107502329 B CN 107502329B CN 201610424261 A CN201610424261 A CN 201610424261A CN 107502329 B CN107502329 B CN 107502329B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/54—Compositions for in situ inhibition of corrosion in boreholes or wells
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/592—Compositions used in combination with generated heat, e.g. by steam injection
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/20—Hydrogen sulfide elimination
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/32—Anticorrosion additives
Abstract
The invention relates to a chemical formula for removing hydrogen sulfide by absorbing hydrogen sulfide and inhibiting hydrogen sulfide generation in heavy oil thermal recovery, belonging to the chemical agent formula and technical field for oil fields. The chemical formula comprises the following components in percentage by mass: 10 to 20 percent of 1,3, 5-tris (2-hydroxyethyl) hexahydro-s-triazine, 10 to 20 percent of N-methyl triazine amide (the sum of the two is about 30 percent), 5 to 10 percent of sodium carbonate, 1 to 2 percent of penetrant isooctanol polyoxyethylene ether phosphate, 0.08 percent of water-soluble polyether defoaming agent and the balance of water. The obtained scavenging agent is mutually soluble with water in any ratio, and the alkaline agent is added to improve the pH value, inhibit the generation of hydrogen sulfide and simultaneously improve the rate of absorbing hydrogen sulfide by triazine. The eliminating agent reacts with hydrogen sulfide rapidly, the reaction product is dissolved in water and cannot block pipelines, the phenomenon that the pipeline is blocked by sediment formed by the reaction of the metal compound eliminating agent and the hydrogen sulfide is avoided, and the adopted chemical agents are all high-temperature resistant agents, and even the eliminating efficiency at high temperature and high pressure is higher than that at normal temperature.
Description
Technical Field
The invention relates to a chemical formula for removing hydrogen sulfide by absorbing hydrogen sulfide and inhibiting hydrogen sulfide generation in heavy oil thermal recovery, belonging to the chemical agent formula and technical field for oil fields.
Background
The hydrogen sulfide is colorless, highly toxic and acidic gas, and has serious harm to human bodies. In the process of thick oil steam injection thermal recovery, hydrogen sulfide gas is generated due to hydrothermal cracking reaction, thermochemical reduction reaction and the like, so that potential safety hazards are brought to production, the hydrogen sulfide also corrodes equipment such as oil production tubing columns, sleeves, oil-well pumps and the like, the generated hydrogen sulfide gas is partially dissolved in produced liquid, and the ground pipelines and the equipment of a joint station are corroded in the process of conveying the well ground pipelines to the joint station. The conventional combined station is used for treating the hydrogen sulfide in a centralized way, so that the cost is high, and the treatment is temporary and permanent. The wellhead hydrogen sulfide surface equipment has complex process and the like. Therefore, the generation of hydrogen sulfide is restrained at the underground oil reservoir from the root, and part of generated hydrogen sulfide gas is eliminated, so that the problems of corrosion of the hydrogen sulfide on underground and ground pipeline equipment and the like are solved, and potential safety hazards such as leakage of the hydrogen sulfide gas at a wellhead are reduced.
At present, a plurality of methods for treating hydrogen sulfide can be divided into coarse desulfurization, semi-fine desulfurization and fine desulfurization according to the desulfurization effect; the method comprises the following steps: regenerated solvent absorption desulfurization, fixed bed adsorption desulfurization, membrane separation method desulfurization, biological desulfurization, physical field desulfurization and the like; according to the characteristics of the removing method, the method can be divided into an absorption method, an adsorption method, an oxidation method, a biological method, a pulse corona method and the like; the method can be divided into wet method and dry method according to the state of the substance.
Dry desulfurization is generally applicable to the treatment of low-sulfur-content gas, particularly to fine desulfurization of gas, has high desulfurization efficiency, needs to be intermittently regenerated or replaced, has relatively low sulfur capacity, most of the desulfurization agents cannot be regenerated and need to be discarded, most of dry desulfurization processes cannot be continuously operated due to the need to replace the desulfurization agents, such as a manganese ore method, a zinc oxide method and the like, the desulfurization agents cannot be regenerated, and the desulfurization agents are discarded after saturation, so that on one hand, an environmental problem is caused, and on the other hand, the desulfurization cost is increased.
Disclosure of Invention
The invention aims to provide a remover for removing associated hydrogen sulfide gas in heavy oil thermal recovery. The method is suitable for eliminating the associated hydrogen sulfide gas in the heavy oil thermal recovery, the rate of absorbing hydrogen sulfide by the main agent is improved while the generation of the associated hydrogen sulfide gas in the heavy oil thermal recovery is inhibited, the associated hydrogen sulfide gas can be quickly eliminated, the product is dissolved in water, no adverse effect is caused to the heavy oil thermal recovery, and the problem that the hydrogen sulfide in the heavy oil steam injection thermal recovery is radically eliminated by underground removal of the associated hydrogen sulfide in the heavy oil thermal recovery is overcome. Effectively protecting the oil production pipe, the sleeve, the oil well pump and other equipment.
The technical scheme adopted by the invention is as follows: the invention relates to a remover for removing associated hydrogen sulfide gas in thick oil thermal recovery, and relates to a chemical formula for removing hydrogen sulfide by absorbing hydrogen sulfide and inhibiting hydrogen sulfide generation in thick oil thermal recovery, wherein the remover comprises triazine compounds as main components, and is characterized in that: the concrete components are as follows by mass ratio:
a main agent: 10-20% of 1,3, 5-tris (2-hydroxyethyl) hexahydro-s-triazine and 10-20% of N-methyl triazine amide (the sum of the two is about 30%)
Alkali agent: 5 to 10 percent of sodium carbonate
Penetrant: 1-2% of isooctanol polyoxyethylene ether phosphate
Defoaming agent: 0.08% of water-soluble polyether defoaming agent
The balance of water.
The invention has the beneficial effects that: the method overcomes the defect that the hydrogen sulfide in the thick oil steam injection thermal recovery is eliminated fundamentally due to the underground clearance of the associated hydrogen sulfide in the thick oil thermal recovery. The method effectively protects the oil production string, the sleeve, the oil well pump and other equipment, the reaction product is dissolved in water and can not block the pipeline, the phenomenon that the metal compound remover reacts with hydrogen sulfide to form precipitate and block the pipeline is avoided, and the adopted chemical agents are all high-temperature resistant agents, and even the removal efficiency at high temperature and high pressure is higher than that at normal temperature.
Detailed Description
To further clarify the contents, features and effects of the present invention, the following examples are given and detailed below:
example 1
Synthesis of an eliminating agent: 20 parts of 1,3, 5-tris (2-hydroxyethyl) hexahydro-s-triazine, 10 parts of N-methyl triazine amide and 63.9 parts of water are added into a reactor and stirred uniformly, then 5 parts of sodium bicarbonate, 1 part of isooctanol polyoxyethylene ether phosphate and 0.08 part of defoaming agent are added and stirred uniformly, and then the mixture is kept stand for 30 minutes to obtain the product.
Example 2
Synthesis of an eliminating agent: adding 10 parts of 1,3, 5-tris (2-hydroxyethyl) hexahydro-s-triazine, 20 parts of N-methyl triazine amide and 58.9 parts of water into a reactor, uniformly stirring, adding 10 parts of sodium bicarbonate, 1 part of isooctanol polyoxyethylene ether phosphate and 0.08 part of defoaming agent, uniformly stirring, and standing for 30 minutes to obtain the product.
Example 3
Synthesis of an eliminating agent: adding 15 parts of 1,3, 5-tris (2-hydroxyethyl) hexahydro-s-triazine, 15 parts of N-methyl triazine amide and 58.9 parts of water into a reactor, uniformly stirring, adding 10 parts of sodium bicarbonate, 1 part of isooctanol polyoxyethylene ether phosphate and 0.08 part of defoaming agent, uniformly stirring, and standing for 30 minutes to obtain the product.
Example 4
Synthesis of an eliminating agent: adding 15 parts of 1,3, 5-tris (2-hydroxyethyl) hexahydro-s-triazine, 15 parts of N-methyl triazine amide and 63.9 parts of water into a reactor, uniformly stirring, adding 5 parts of sodium bicarbonate, 1 part of isooctanol polyoxyethylene ether phosphate and 0.08 part of defoaming agent, uniformly stirring, and standing for 30 minutes to obtain the product.
Testing the performance of the eliminating agent:
the hydrogen sulfide elimination was compared at a pressure of 1MPa and a temperature of 150 ℃ using the scavengers of examples 1-4 with existing commercial desulfurization agents. The results are as follows:
| example 1 | Example 2 | Example 3 | Example 4 | Market desulfurizing agent | |
| Hydrogen sulfide removal rate | 98.5％ | 97.8％ | 99.3％ | 98.9％ | 86.5％ |
Field embodiment
The performance test of the remover in the laboratory shows that the formula in the example 3 has the best desulfurization effect under the pressure of 1MPa and the temperature of 150 ℃, and the liquid quantity of the thick oil thermal recovery well in certain Liaohe oil field to which the remover is applied is 20m3And d, 15000ppm of wellhead hydrogen sulfide concentration (a test method: a hydrogen sulfide detector), and a measuring point and a wellhead monitoring point A are arranged. The prior triazine hydrogen sulfide desulfurizer is compared with the remover for removing the associated hydrogen sulfide gas in the heavy oil thermal recovery by field application. The results (with direct addition to the heavy oil thermal recovery well) were as follows:
remarking: the time taken from the start of the addition of the agent to the point at which the hydrogen sulfide concentration had dropped to 0 ppm.
Through experimental data, the concentration of hydrogen sulfide at a wellhead of a thickened oil thermal recovery well is detected to be 15000ppm (the concentration of hydrogen sulfide in a gas phase), the concentration of field gas-phase hydrogen sulfide is reduced to 0ppm, the dosage of a remover for removing the associated hydrogen sulfide gas in thickened oil thermal recovery is smaller than that of triazine desulfurizer in the market, the concentration of hydrogen sulfide at a point A is reduced to 0ppm, the time for removing the remover for removing the associated hydrogen sulfide gas in thickened oil thermal recovery is shorter than that of the triazine desulfurizer, and the result shows that the field effect of removing the remover for removing the associated hydrogen sulfide gas in thickened oil thermal recovery is good.
Claims (1)
1. A remover for removing associated hydrogen sulfide gas in heavy oil thermal recovery, the main component of the remover is triazine compounds, and the remover is characterized in that: the concrete components are composed according to the following mass ratio;
a main agent: 10 to 20 percent of 1,3, 5-tri (2-hydroxyethyl) -hexahydro-s-triazine and 10 to 20 percent of N-methyl triazine amide
Alkali agent: 5 to 10 percent of sodium carbonate
Penetrant: 1-2% of isooctanol polyoxyethylene ether phosphate
Defoaming agent: 0.08% of water-soluble polyether defoaming agent
The balance of water.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610424261.5A CN107502329B (en) | 2016-06-14 | 2016-06-14 | Eliminating agent for eliminating associated hydrogen sulfide gas in heavy oil thermal recovery |
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| CN201610424261.5A CN107502329B (en) | 2016-06-14 | 2016-06-14 | Eliminating agent for eliminating associated hydrogen sulfide gas in heavy oil thermal recovery |
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| CN107502329B true CN107502329B (en) | 2020-07-10 |
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| CN107892909A (en) * | 2017-12-29 | 2018-04-10 | 四川正蓉实业有限公司 | A kind of high efficiency composition sulphur removal corrosion inhibitor and preparation method thereof |
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| US7517447B2 (en) * | 2004-01-09 | 2009-04-14 | Clearwater International, Llc | Sterically hindered N-methylsecondary and tertiary amine sulfur scavengers and methods for making and using same |
| US7264786B2 (en) * | 2004-04-21 | 2007-09-04 | Bj Services Company | Method of scavenging hydrogen sulfide and/or mercaptans from fluid and gas streams |
| EA015649B1 (en) * | 2007-04-03 | 2011-10-31 | Эм-Ай ЭлЭлСи | Process for preventing or remediating trithiazine deposition in high hs wells |
| US9296940B2 (en) * | 2009-12-21 | 2016-03-29 | Baker Hughes Incorporated | Dithiazine derivatives |
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