CN102775977B - Treating agent for inhibiting generation of hydrothion in steam flooding injection well, displacing oil and reducing viscosity and application thereof - Google Patents
Treating agent for inhibiting generation of hydrothion in steam flooding injection well, displacing oil and reducing viscosity and application thereof Download PDFInfo
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- CN102775977B CN102775977B CN201210285208.3A CN201210285208A CN102775977B CN 102775977 B CN102775977 B CN 102775977B CN 201210285208 A CN201210285208 A CN 201210285208A CN 102775977 B CN102775977 B CN 102775977B
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Abstract
The invention provides a treating agent for inhibiting generation of hydrothion in a steam flooding injection well, displacing oil and reducing viscosity and application of the treating agent. The treating agent comprises sodium nitrate, sodium hydroxide and high-temperature-resistance sulphur-free fluorocarbon surfactant, wherein sodium nitrate serves as an oxidant to increase the valence of sulphur so as to avoid the generation of hydrothion; sodium hydroxide is used for stabilizing sulphur with increased valence so that the reaction for inhibiting generation of hydrothion is irreversible and the generation of hydrothion in an oil reservoir can be inhibited; and the high-temperature-resistance sulphur-free fluorocarbon surfactant is used for displacing oil and reducing viscosity. The invention also provides application of the treating agent for inhibiting generation of hydrothion in the oil reservoir in the steam flooding injection well. In steam flooding, the treating agent is injected into stratum together with steam, thereby inhibiting generation of hydrothion in the oil reservoir at the source, further reducing the damage of hydrothion and achieving the functions of displacing oil and reducing viscosity.
Description
Technical field
The invention relates to treatment agent and application that a kind of steam flood Injection Well suppresses hydrogen sulfide generation and displacement of reservoir oil viscosity reduction, specifically for steam flood Injection Well, from source, suppress the generation of hydrogen sulfide and there is the chemical processing agent of displacement of reservoir oil viscosity reduction effect simultaneously, and utilize this treatment agent to suppress to generate in oil reservoir the method for hydrogen sulfide and displacement of reservoir oil viscosity reduction.
Background technology
Hydrogen sulfide is a kind of colourless gas, and proportion is 1.1895, is heavier than air, and during normal temperature, the solubleness of hydrogen sulfide in water is 3.864g/L, and the solubleness in oil is 3.3g/L, and under high pressure, solubleness is larger.When people sucks high density (1500mg/m
3in the time of above), poisoner can lose consciousness rapidly, and companion acutely twitches, moment breath stopped, heartbeat stops then, is called as " lightning class " death.In addition, hydrogen sulfide poisoning also can cause shed tears, the symptom such as photophobia, conjunctival congestion, oedema, cough.In field, oil field, the harm of hydrogen sulfide also shows corrosion of metal, being mainly hydrogen embrittlement destroys, hydrogen embrittlement destroys and very easily to cause disconnected de-, the manifold of ground of down-hole string and pressurized vessel bearing capacity to decline, occur to reveal and explosion hazard, well head set-up is destroyed, causes serious blowout out of control or firing accident.In addition, hydrogen sulfide also can with uphole equipment, well head set-up, subsurface tool in the non-metallic material such as rubber, graphite react.Cause rubber to follow the string; The inefficacy of sealing member.Can cause the leakage of down-hole oil production tubing string, lose efficacy; To ground pipe laying, pressurized vessel corrosion, cause that metallic substance plasticity declines, bearing capacity reduces and production development accident.In the daily production of oil well, there is following several approach can touch hydrogen sulfide in production fluid: the daily light maintenance operation of oil well, the setting-out of workman's well head and sampling, when cleaning separator, three-in-one, surge tank, when pipeline or separator emptying, when changing or keeping in repair measuring instrument, all may there is H
2the danger that S is poisoning.
According to introducing the major cause that produces hydrogen sulfide in oil well in prior art document " Liaohe Oil Field oil well hydrogen sulfide mechanism of production and prophylactico-therapeutic measures " (< < petroleum prospecting and exploitation > > 2008..6P349-354), be: in crude oil, the organic sulfide such as mercaptan, thioether at high temperature reacts generation hydrogen sulfide; In stratum, containing sulfur minerals at high temperature reacts generation hydrogen sulfide; In local water, sulphate reducing bacteria becomes hydrogen sulfide by sulfate reduction under reservoir condition.
In field, oil field, mainly take following measures to carry out hydrogen sulfide both at home and abroad at present and subdue control: sulfide hydrogen casing gas is taked emptying, regular well-flushing, entered the station and carry out rear end desulfurization processing; Sulfide hydrogen production fluid is taked to set up desulfurization station, is used anticorrosion tubing, pressurized vessel carries out undercoat.The effect that these measures obtain is unsatisfactory.
CN102153997A discloses a kind of method that oil field is administered agent and administered hydrogen sulfide with hydrogen sulfide.The weight percent of described improvement agent consists of nitrate 10%-45%, nitrite 5%-50%, water-soluble microorganism is activated system 5%-10% and water 45%-80%.While administering oil reservoir hydrogen sulfide, in water filling, add hydrogen sulfide and administer agent, inject stratum; While administering production system hydrogen sulfide, in production fluid aerogenesis, add improvement agent, mix with production fluid aerogenesis.
CN101235281A discloses and a kind ofly for oil field, has eliminated hydrogen sulphide in thick oil, eliminated the method for preventing and treating of the hydrogen sulphide in thick oil before extraction well head.Wherein first by weight percentage 5～30% Quilonum Retards, 3～25% bicarbonate of ammonia, 3～20% sodium-chlor, 2～15% octyl phenol Soxylat A 25-7s to be joined in 30～60% water to prepare treatment agent, then under 25 ℃, the condition of 101325Pa, (this condition should be under normal temperature normal atmosphere, it is emptying state, dangerous), described treatment agent is inputted oil well from oil sets annular space, treatment agent and viscous crude hybrid reaction, stink damp physical efficiency is reduced to 0～10PPM.
CN101612516A discloses the removal method of hydrogen sulfide in a kind of ferrous hydrogen sulfide remover and gas, the solution that described ferrous hydrogen sulfide remover is iron cpd, total ferric ion concentration in this solution is greater than 0mol/L and is less than the concentration that produces crystallization while being all divalent/trivalent iron ion, pH value=1.5～3.0 of solution.Described hydrogen sulfide removal method is by high-pressure pump, above-mentioned hydrogen sulfide scavengers to be pumped into the jet inlet of jet-pump, and pending gas is inhaled into jet-pump and gives birth to desulphurization reaction with the abundant hybrid concurrency of hydrogen sulfide scavengers.
CN102090420A discloses a kind of crude oil gathering system sulphate reducing bacteria and has generated secondary hydrogen sulfide biological inhibition method, and the biostats that wherein suppresses individual well is comprised of 50mg/L Sodium Nitrite, 20mg/L Sodium Tetraborate; Suppress the biostats of petroleum transferring station by 40-60mg/L Sodium Nitrite, 25mg humic acids, 10-20mg/L Sodium Tetraborate, 20-30mg/L sodium hydroxide electrolyte ingredient; The biostats that suppresses joint station is comprised of 40-60mg/L Sodium Nitrite, 25mg humic acids, 10-20mg/L Sodium Tetraborate, 20-30mg/L sodium hydroxide ionogen, 95mg/L glutaraldehyde sterilant; The method is in crude oil transmission process, from source, to control the generation of hydrogen sulfide, has that the hydrogen sulfide time of inhibition is long, cost is low, the feature of non-secondary pollution, has improved crude oil gathering system operation place Working environment.
(China's safety in production the 5th the 2nd phase of volume of science and technology 2009.04P178-180) has been introduced a kind of hydrogen sulfide shaft bottom absorption process: to the casing gas that cannot light, can adsorb to process with sweetening agent with administering suggestion > > in the strick precaution of the on-the-spot hydrogen sulfide of < < From Liaohe Heavy Crude thermal recovery.Hydrogen sulfide can form precipitation after being combined as iron, zinc, copper with heavy metal ion within the several seconds, therefore in reservoir, injects iron content, zinc, the isoionic chemical reagent of copper, and they can, by hydrogen sulfide absorption in oil reservoir, disappear gas.But the shortcoming of this method is that the metallic sulfide forming may affect the storage and collection performance of reservoir etc.
Yet, the method for the improvement oil well hydrogen sulfide that above-mentioned prior art is recorded, emphasis is all " controlling ", also from the source of Oil extraction process, does not suppress hydrogen sulfide generation, the method that hydrogen sulfide just can not be generated in oil reservoir at present.And at present for the oil-displacing agent of steam flood, mostly be Sulfonates, strengthened the possibility that oil reservoir produces hydrogen sulfide.
Summary of the invention
One object of the present invention is to provide a kind of and new for steam flood Injection Well, suppresses the treatment agent that oil reservoir generates hydrogen sulfide and has the effect of displacement of reservoir oil viscosity reduction simultaneously.
Another object of the present invention is to provide the application of described treatment agent, specifically utilize described treatment agent to suppress for steam flood Injection Well the method that oil reservoir generates hydrogen sulfide and plays the effect of displacement of reservoir oil viscosity reduction simultaneously.
First, the invention provides the treatment agent that a kind of new steam flood Injection Well suppresses hydrogen sulfide generation and displacement of reservoir oil viscosity reduction, this treatment agent comprises:
SODIUMNITRATE;
Sodium hydroxide;
The fluorocarbon surfactant of the non-sulfur-bearing of high temperature resistance.
In treatment agent of the present invention, described SODIUMNITRATE is as oxygenant, and the valency of sulphur is raise, and can not generate hydrogen sulfide; Described sodium hydroxide is for stablizing the sulphur after valency raises, the reaction that makes to suppress hydrogen sulfide is irreversible, and (resultant of reaction is water-soluble products, can be dissolved in water and separate with crude oil easily, can not have a negative impact to crude production), realize the generation that suppresses hydrogen sulfide in oil reservoir; The fluorocarbon surfactant of the non-sulfur-bearing of high temperature resistance plays the effect of displacement of reservoir oil viscosity reduction, the fluorocarbon surfactant of the described non-sulfur-bearing of high temperature resistance can be fluorocarbon surfactant conventional in affiliated field, as long as can play displacement of reservoir oil viscosity reducing effect, for example: can be fluorocarbon surfactant TF3721 (this product is mainly import, and Shanghai Lai Guo Chemical Co., Ltd. sells); In addition, sodium hydroxide, when subduing hydrogen sulfide, also has oil cleaning, and described surfactant acting in conjunction, can improve oil recovery factor 3%.Thereby, utilize treatment agent of the present invention, can realize the generation that suppresses hydrogen sulfide from source in oil reservoir, and play the effect of displacement of reservoir oil viscosity reduction simultaneously.
In a specific embodiments of the present invention, described treatment agent is to be made into by the fluorocarbon surfactant of SODIUMNITRATE, sodium hydroxide, the non-sulfur-bearing of high temperature resistance and water the mixed solution forming.Theoretically, the concentration of the fluorocarbon surfactant of SODIUMNITRATE, sodium hydroxide, the non-sulfur-bearing of high temperature resistance is all available in solubility range.According to preferred specific embodiments of the present invention, in described treatment agent, SODIUMNITRATE mass concentration 0.1-2%, sodium hydroxide mass concentration 0.1-2%, the fluorocarbon surfactant mass concentration 0.2-4% of the non-sulfur-bearing of high temperature resistance.The concentration range of the fluorocarbon surfactant of SODIUMNITRATE, sodium hydroxide, the non-sulfur-bearing of high temperature resistance is mainly to test resulting hydrogen sulfide growing amount according to thing mould, and determine from effect and the consideration of economic dispatch many factors, in actual production, according to conditions such as different blocks, geologic condition, hole conditions, can suitably adjust this concentration, while specifically implementing, also can in described scope, suitably adjust according to the processing liquid measure in Injection Well and injection speed.Described water is preferably softening water, can on-the-spot preparation treatment agent solution of the present invention.
On the other hand, the present invention also provides described treatment agent suppressing for steam flood Injection Well the application that oil reservoir generates hydrogen sulfide and displacement of reservoir oil viscosity reduction.In steam flood process, treatment agent of the present invention, with steam injection stratum, can effectively be suppressed to hydrogen sulfide and generates in oil reservoir, the injury of hydrogen sulfide is dropped to minimum, there is the effect of displacement of reservoir oil viscosity reduction simultaneously.
On the other hand, the present invention also provides a kind of steam flood Injection Well to suppress the method that oil reservoir generates hydrogen sulfide and displacement of reservoir oil viscosity reduction, and the method comprises:
By treatment agent of the present invention, in steam flood process, with steam injection stratum, suppress hydrogen sulfide and generate in oil reservoir, play the effect of displacement of reservoir oil viscosity reduction simultaneously.
According to specific embodiment of the invention scheme, steam flood Injection Well of the present invention suppresses in the method for oil reservoir generation hydrogen sulfide, and the injection speed of described treatment agent is 70-100ml/ minute.This speed can suitably be adjusted according to the steam treatment speed of steam flood Injection Well and equipment injectability in described scope, should guarantee effective injection rate for the treatment of agent simultaneously.
Particularly, the injection mode of described treatment agent is that coordinating with steam rapid heat cycle injects continuously, or minute slug injects.
Treatment agent of the present invention can adopt any known equipment to carry injection.Preferably, on the other hand, it is a kind of for realizing the custom-designed treatment solution handling equipment of aforesaid method that the present invention also provides, and this equipment comprises:
Be equipped with the treatment solution storage receptacle of described treatment solution;
Treatment solution line of pipes, this pipeline one end is communicated with described treatment solution storage receptacle, and the other end is for being communicated with the steam injection pipeline of steam flood Injection Well;
Be arranged on the ram pump on described line of pipes;
And, on the line of pipes of outlet of plunger pump, be provided with ball-and-seat.
According to specific embodiment of the invention scheme, in described treatment solution handling equipment, ram pump is provided with two, and is to be set up in parallel on described line of pipes.
In equipment of the present invention, described treatment solution storage receptacle can be provided with liquidometer.On described treatment solution line of pipes, also can be provided with the necessary conventional components such as valve.
Compared with prior art, the invention has the beneficial effects as follows:
(1) in stratum, suppress the generation of hydrogen sulfide, can make can not generate hydrogen sulfide in steam flood process;
(2) the method is raw materials used is all commercially produced products, and raw material is cheap and easy to get;
(3) in recovery well, do not have hydrogen sulfide to produce, eliminate the sampling of oil recovery work, potential safety hazard during patrol, and it is up to standard to make to produce hydrogen sulfide well safety and environmental protection, eliminates the disadvantageous effect to equipment etc. of hydrogen sulfide in the processes such as crude oil transhipment collection is defeated;
(4) resultant of reaction is water-soluble products, can be dissolved in water and separate with crude oil easily, can not have a negative impact to crude production;
(5) when subduing hydrogen sulfide, can improve oil displacement efficiency, finally improve oil recovery factor.
Accompanying drawing explanation
Fig. 1 is that the steam flood Injection Well of the present invention's one specific embodiment suppresses the structural representation that oil reservoir generates the treatment solution handling equipment of hydrogen sulfide.
Embodiment
Below by specific embodiment, further describe feature and the result of use of method of the present invention, but the present invention is not therefore subject to any restriction.
Embodiment 1:
Shown in Figure 1, the treatment solution handling equipment that the steam flood Injection Well of the present embodiment suppresses oil reservoir generation hydrogen sulfide comprises:
Treatment solution storage receptacle 1 for accommodating treatment solution, is wherein provided with liquidometer 11;
Treatment solution line of pipes 2, this pipeline one end is communicated with described treatment solution storage receptacle 1, and the other end is for being communicated with the steam injection pipeline 5 of steam flood Injection Well; On line of pipes, be also provided with necessary valve 21;
Be set up in parallel two ram pumps 3 on described line of pipes;
And, on the line of pipes of outlet of plunger pump, be provided with ball-and-seat 4.
Brocade 45-024-K26 well steam injection speed is approximately 102 tons/day, i.e. 71 kg/minute.
SODIUMNITRATE, sodium hydroxide, fluorocarbon surfactant TF3721 (purchased from Shanghai Lai Guo Chemical Co., Ltd.), softening water scene are mixed with to treatment agent solution, wherein, SODIUMNITRATE mass concentration 0.5%, sodium hydroxide mass concentration 0.5%, fluorocarbon surfactant TF3721 mass concentration 1%.
The treatment agent solution High Temperature High Pressure drip pump of on-the-spot preparation, by 70ml/ minute speed, coordinating with steam rapid heat cycle injected.Corresponding recovery well Jin45-024-K25Jing, contrast anterior cannula concentration of hydrogen sulfide 750mg/m
3, injection well pressure 7.0MPa, recovery well day 1.1 tons of produce oils, inject after 40 days, sleeve pipe concentration of hydrogen sulfide is 100mg/m
3, injecting after 60 days, concentration of hydrogen sulfide is 0mg/m
3, injection well pressure is reduced to 6.5MPa, recovery well day 2.5 tons of produce oils, sleeve pipe detects without hydrogen sulfide at present, increases 145 tons of oil, produces normal.
Claims (1)
1. steam flood Injection Well suppresses the method that oil reservoir generates hydrogen sulfide and displacement of reservoir oil viscosity reduction, and the method comprises:
By a kind for the treatment of agent, in steam flood process, with steam continuously or minute slug injects stratum, suppress hydrogen sulfide and generate in oil reservoir, play the effect of displacement of reservoir oil viscosity reduction simultaneously;
Wherein, described treatment agent is to be made into by the fluorocarbon surfactant of SODIUMNITRATE, sodium hydroxide, the non-sulfur-bearing of high temperature resistance and water the mixed solution forming, wherein, described SODIUMNITRATE mass concentration 0.1-2%, sodium hydroxide mass concentration 0.1-2%, the fluorocarbon surfactant mass concentration 0.2-4% of the non-sulfur-bearing of high temperature resistance; The injection speed for the treatment of agent is 70-100ml/ minute;
Wherein, the fluorocarbon surfactant of the non-sulfur-bearing of high temperature resistance is fluorocarbon surfactant TF3721.
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| CN108868721A (en) * | 2018-08-01 | 2018-11-23 | 中国石油天然气股份有限公司 | A method of associated gas after desulfurization is driven using steam carry out viscous crude handle up well viscosity reduction |
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| CN114058420B (en) * | 2021-11-13 | 2022-10-28 | 山东省众力环保科技有限公司 | Hydrogen sulfide remover for oil and gas wells and preparation method thereof |
| CN114293036A (en) * | 2021-12-24 | 2022-04-08 | 南方锰业集团有限责任公司大新锰矿分公司 | Method for inhibiting generation of hydrogen sulfide in leaching process of high-sulfur manganese carbonate ore |
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