CN108868721A - A method of associated gas after desulfurization is driven using steam carry out viscous crude handle up well viscosity reduction - Google Patents
A method of associated gas after desulfurization is driven using steam carry out viscous crude handle up well viscosity reduction Download PDFInfo
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- CN108868721A CN108868721A CN201810862798.9A CN201810862798A CN108868721A CN 108868721 A CN108868721 A CN 108868721A CN 201810862798 A CN201810862798 A CN 201810862798A CN 108868721 A CN108868721 A CN 108868721A
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 86
- 230000023556 desulfurization Effects 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000010795 Steam Flooding Methods 0.000 claims abstract description 38
- 238000002347 injection Methods 0.000 claims abstract description 24
- 239000007924 injection Substances 0.000 claims abstract description 24
- 230000007935 neutral effect Effects 0.000 claims abstract description 24
- 150000001875 compounds Chemical class 0.000 claims abstract description 10
- 239000004094 surface-active agent Substances 0.000 claims description 23
- 125000005233 alkylalcohol group Polymers 0.000 claims description 16
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 16
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000010793 Steam injection (oil industry) Methods 0.000 claims description 13
- -1 alkyl phenol Chemical compound 0.000 claims description 11
- 150000001408 amides Chemical class 0.000 claims description 10
- 238000005516 engineering process Methods 0.000 claims description 10
- 239000006260 foam Substances 0.000 claims description 10
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 9
- 229930195729 fatty acid Natural products 0.000 claims description 9
- 239000000194 fatty acid Substances 0.000 claims description 9
- 150000004665 fatty acids Chemical class 0.000 claims description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 8
- 238000013329 compounding Methods 0.000 claims description 7
- 150000002191 fatty alcohols Chemical class 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 3
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims description 2
- 238000010025 steaming Methods 0.000 claims description 2
- 150000001298 alcohols Polymers 0.000 claims 1
- 239000003129 oil well Substances 0.000 abstract description 10
- 239000010779 crude oil Substances 0.000 abstract description 6
- 230000002195 synergetic effect Effects 0.000 abstract description 4
- 239000013589 supplement Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 108
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 25
- 239000001569 carbon dioxide Substances 0.000 description 11
- 229910002092 carbon dioxide Inorganic materials 0.000 description 11
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 10
- 238000011084 recovery Methods 0.000 description 9
- 239000003921 oil Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000011160 research Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 3
- 235000011089 carbon dioxide Nutrition 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000790917 Dioxys <bee> Species 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010344 co-firing Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 125000005670 ethenylalkyl group Chemical group 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012835 hanging drop method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The present invention provides a kind of using steam drives associated gas after desulfurization and carries out viscous crude and handle up the method for well viscosity reduction, the method includes：The steam is driven after desulfurization associated gas and is successively alternately injected into viscous crude suitable for the thinner that compound of associated gas after driving desulfurization with steam and is handled up after well, lower pump produces.Party's normal direction viscous crude well of handling up is implanted sequentially steam and drives the associated gas after desulfurization and neutral thinner, pass through the synergistic effect of gas and neutral thinner, reduce heavy crude well viscosity of crude, improve its crude oil fluidity, and gas injection can supplement stratum energy, it improves oil well and returns row's ability, to realize the purpose for improving heavy crude well yield.
Description
Technical field
The present invention relates to a kind of using steam drives associated gas after desulfurization and carries out viscous crude and handle up the method for well viscosity reduction, belongs to oil field
Applied technical field.
Background technique
Oil well associated gas refers to oil field in recovery process, the gas occurred between oil reservoir with petroleum liquid, master
Wanting ingredient is methane, usually also contains a large amount of ethane and hydrocarbon heavy constituent.To the oil well associated gas that can be lighted, this field it is general
It is to be taken centralized recovery all over way, after processing, the fuel as heating furnace is used.
What steam drove turns to drive exploitation, and the associated gas component for generating oil well changes, the big gas of the harm such as hydrogen sulfide
Component gradually rises, and the associated gas for causing oil well to generate can not utilize.According to the preliminary statistics, steam drives some oil wells hydrogen sulfide content
Up to 1000ppm, if still take recycling burn method, once burning is insufficient, the personnel of will lead to are poisoned to death, exist compared with
Big security risk.The processing method of steam flooding well associated gas is mainly taken centralized recovery to enter the station at present, then into desulfurization
Tower is after desulfurization process, direct emptying processing.
But the steam after the emptying desulfurization of this part drives associated gas, through detecting, gas component is mainly methane and dioxy
Change carbon.Repeatedly chemical examination numerical value is methane content 30% or so, and carbon dioxide content is 60% or so.The wherein first of independent component
Alkane can burn, and independent component carbon dioxide can be pressed into dry ice also and can be used as viscosity reduction displacement of reservoir oil use, now using the side being directly vented
Formula will cause to waste, while the discharge of carbon dioxide also leads to atmosphere pollution.
Currently, being related to the key technology of associated gas and exhaust gas and patented method research is concentrated mainly on：It is gas-liquid separation, toxic
The development of the associated gases recovery methods and device such as gas separation.Such as a kind of pressurizing mixed transportation dress for associated gas that the Zhu Tian longevity is studied
It sets and its recovery method (201010504863.4), mainly has developed a kind of pressurizing mixed transportation device, keep associated gas mixed with crude oil
Conjunction is delivered to gathering station.A kind of wet associated gas dehydration hydrocarbon removal process device (201220317562.5) in sledge dress carburetion field, Zhang Yuxi
The vertical associated gas dispenser (201320320603.0) of research, the access type associated gas recovery device of Wei Lijun research
(201310449877.4) etc., it is concentrated mainly on the development of associated gas recovery device.A kind of chemical method propylene of Zhou Yunxia research
Amide produces the processing method (201110070853.9) for summarizing exhaust gas, mainly has studied a kind of processing exhaust gas, Propylene recovery nitrile
Method.A kind of combustion in situ producing well associated gas inorganic agent and its preparation method and application of Liu Rongwei research
(201511005894.4), the toxic associated gas of Chemical treatment is mainly utilized.In above-mentioned patent research, associated gas is not referred to
Reutilization technology.
It is mainly the effective component purified in associated gas and exhaust gas currently with the technology of associated gas and exhaust gas, removal is invalid
Ingredient.If scene is for the component that can be burnt, invalid components are removed by physical methods such as pressurizations, realize mentioning for combustion components
It is pure and mild to be applied to burning.Or for the associated gas and exhaust gas for having carbon dioxide component, take physics method be pressed into dry ice into
Row recycles.But carbon dioxide is pressed into dry ice and there is a problem of that processing cost is high, while must also be had more than 50,000 sides
The harsh conditions of associated gas or exhaust gas.In addition, also directly being mixed at the scene using the associated gas that steam drives after desulfurization with natural gas
The method burnt afterwards is to realize its recycling, but in During Co-firing, and it is not easy to control that there are multifuel combustion ratios, combustion position
The problems such as bad.But in the method for above-mentioned recycling and reusing, it is not mentioned to yet and associated gas is applied in oil-water well volume increase.
There are many technology of oil-water well volume increase, such as surfactant, gas drive, steam soak, relate to the use of gas, main
There is nitrogen to help row, non-hydrocarbons gas drive etc., there is the oily effect of increasing production of preferable increasing.But the above-mentioned gas well stimulation referred to is equal
It is generated using special equipment, implementation volume increase is not carried out using oil well associated gas.
Therefore it provides it is a kind of using steam drive associated gas after desulfurization and carry out the handle up method of well viscosity reduction of viscous crude have become this
The technical issues of field urgent need to resolve.
Summary of the invention
In order to solve the above shortcomings and deficiencies, after being suitable for driving desulfurization with steam the purpose of the present invention is to provide one kind
The thinner of associated gas compounding.
It is suitable for and the system for the thinner that associated gas compounds after steam drive desulfurization the object of the invention is also to provide described
Preparation Method.
The object of the invention is also to provide a kind of using steam drives associated gas after desulfurization and carries out viscous crude and handle up well viscosity reduction
Method.Party's normal direction viscous crude provided by the present invention well of handling up is implanted sequentially steam and drives the associated gas after desulfurization and neutral viscosity reduction
Agent reduces heavy crude well viscosity of crude, improves its crude oil fluidity, and gas by the synergistic effect of gas and neutral thinner
Body injection can supplement stratum energy, improve oil well and return row's ability, to realize the purpose for improving heavy crude well yield.
The purpose of the present invention is to provide again the steam and drives the application that associated gas after desulfurization is handled up in viscous crude in well viscosity reduction.
In order to achieve the above objectives, on the one hand, the present invention provides a kind of to be compounded suitable for associated gas after driving desulfurization with steam
Thinner, wherein by it is described be suitable for driving desulfurization with steam after the total weight of thinner that compound of associated gas for 100% in terms of,
The neutral surface active agent with viscosity-reducing performance, 1-5% comprising 10-30% have foam performance neutral surface active agent and
Excess water.
Specific embodiment according to the present invention, in the thinner compounded suitable for associated gas after driving desulfurization with steam
In, the neutral surface active agent with viscosity-reducing performance includes fatty acid alkanol amides, alkyl phenol polyoxyethylene ether and fat
The combination of one or more of alcohol polyoxyethylene ether.
Specific embodiment according to the present invention, in the thinner compounded suitable for associated gas after driving desulfurization with steam
In, the neutral surface active agent with viscosity-reducing performance includes fatty acid alkanol amides, alkyl phenol polyoxyethylene ether and fat
Alcohol polyoxyethylene ether.
Specific embodiment according to the present invention, in the thinner compounded suitable for associated gas after driving desulfurization with steam
In, the neutral surface active agent with foam performance includes polyoxyethylated alkyl alcohol -8, polyoxyethylated alkyl alcohol -
10, one or more of polyoxyethylated alkyl alcohol -15, polyoxyethylated alkyl alcohol -20 and polyoxyethylated alkyl alcohol -22
Combination.
Specific embodiment according to the present invention, in the thinner compounded suitable for associated gas after driving desulfurization with steam
In, the neutral surface active agent with foam performance is polyoxyethylated alkyl alcohol -10.
Specific embodiment according to the present invention, in the thinner compounded suitable for associated gas after driving desulfurization with steam
In, it is in terms of 100% by the total weight of the thinner, it is poly- that it includes the alkyl phenols of the fatty acid alkanol amides of 5-8%, 5-10%
Ethylene oxide ether, the fatty alcohol polyoxyethylene ether of 3-7%, 1-4% polyoxyethylated alkyl alcohol -10 and excess water.
The thinner provided by the present invention includes neutral surface active agent, specifically by the neutral-surface with viscosity-reducing performance
Activating agent and neutral surface active agent's composition with foam performance, the reason of select neutral surface active agent, is steam, which drives, to be taken off
The component of associated gas is mainly methane and carbon dioxide after sulphur, and wherein carbon dioxide component is sour gas, such as Selective dissolution water
Afterwards in the surfactant of alkalinity, carbon dioxide will be consumed, synergistic effect can reduce.
On the other hand, the present invention also provides the thinners compounded suitable for associated gas after driving desulfurization with steam
Preparation method comprising following steps：
The neutral surface active agent with viscosity-reducing performance, the neutral surface active agent with foam performance are mixed according to the proportion
Viscosity reduction active component is obtained after conjunction；
The viscosity reduction active component is added to again in the water of target proportion, obtains the companion after being suitable for driving desulfurization with steam
The thinner of anger compounding.
Specific embodiment according to the present invention, the system for the thinner that associated gas compounds after this is suitable for driving desulfurization with steam
In Preparation Method, described be mixed into is mixed at room temperature, incorporation time 8h.
Specific embodiment according to the present invention, the system for the thinner that associated gas compounds after this is suitable for driving desulfurization with steam
In Preparation Method, when preparing viscosity reduction active component, to viscosity-reducing performance neutral surface active agent, with the neutrality of foam performance
The addition sequence of surfactant does not do specific requirement, in the present invention more specifically embodiment, i.e., to fatty acid alkanol
Amide, alkyl phenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, polyoxyethylated alkyl alcohol -10 addition sequence do not do specifically
It is required that.
It drives associated gas after desulfurization in another aspect, the present invention also provides a kind of using steam and carries out viscous crude and handle up well viscosity reduction
Method, wherein the method includes：
By associated gas after steam drive desulfurization and the viscosity reduction compounded suitable for associated gas after driving desulfurization with steam
Agent is successively alternately injected into viscous crude and handles up after well, and lower pump produces.
Specific embodiment according to the present invention, associated gas carries out viscous crude and handles up well viscosity reduction after this drives desulfurization using steam
In method, it than (volume ratio) is 30-60 that the steam, which drives the miscible of well steam injection amount of handling up of associated gas and viscous crude after desulfurization,:1.
Specific embodiment according to the present invention, associated gas carries out viscous crude and handles up well viscosity reduction after this drives desulfurization using steam
It is described to be suitable for and companion after the volume injection rate for the thinner that associated gas compounds after steam drive desulfurization and steam drive desulfurization in method
Angry volume injection rate ratio between the two is 1:800-1500.
Specific embodiment according to the present invention, associated gas carries out viscous crude and handles up well viscosity reduction after this drives desulfurization using steam
In method, this method uses slug formula injection technology.
Specific embodiment according to the present invention, associated gas carries out viscous crude and handles up well viscosity reduction after this drives desulfurization using steam
In method, the slug formula injection technology is the injection of 5 slug formulas, i.e., steam drives associated gas, thinner, steam drive desulfurization after desulfurization
Associated gas, thinner, steam drive associated gas after desulfurization afterwards.
Specific embodiment according to the present invention, associated gas carries out viscous crude and handles up well viscosity reduction after this drives desulfurization using steam
In method, associated gas slug amount is that steam drives associated gas total injection rate after desulfurization after every section of steam of slug formula injection technology drives desulfurization
1/3.
Specific embodiment according to the present invention, associated gas carries out viscous crude and handles up well viscosity reduction after this drives desulfurization using steam
In method, the volume ratio of associated gas slug amount is 1 after the corresponding leading portion steam drive desulfurization of every section of thinner slug amount:800-
1500。
In the specific embodiment of the invention, this, which using steam drives associated gas after desulfurization and carries out viscous crude, handles up the side of well viscosity reduction
The construction technology of method is：Service shaft thermal recovery operation, connecting pipeline are implanted sequentially associated gas after steam drives desulfurization and (are set using dedicated
It is standby, such as pressure fan), thinner (using pump tank), steam drives associated gas after desulfurization, thinner, and steam drives associated gas after desulfurization, boils in a covered pot over a slow fire
Well, steam injection boil in a covered pot over a slow fire well, lower pump production.
Associated gas after desulfurization is driven using steam in provided by the present invention this to carry out in the method that viscous crude handles up well viscosity reduction, is steamed
Associated gas compounding thinner uses after vapour drives desulfurization, first is that the synergistic effect of carbon dioxide and thinner in gas component, it can
Viscosity of crude is preferably reduced, oil-water interfaces affinity is improved, improves crude oil fluidity；Second is that the injection of gas plays supplement
The effect of stratum energy, the carbon dioxide component in associated gas are dissolved in viscous crude, make viscous crude volume expansion, when strata pressure is low
When saturation pressure, carbon dioxide gas evolution drives crude oil, improves the row's of returning ability of oil well.
Another aspect drives after desulfurization associated gas the present invention also provides the steam and handles up answering in well viscosity reduction in viscous crude
With.
Specifically, this using steam drive desulfurization after associated gas carry out viscous crude handle up well viscosity reduction method realized it is beneficial
Technical effect is as follows：
(1) it opens steam and drives the new way that the associated gas after desulfurization recycles.
(2) risk that associated gas outlet after desulfurization pollutes environment has been prevented.
(3) associated gas and neutral thinner after slug formula injection desulfurization, realizes heavy crude well viscosity reduction, the row of helping, improves
Heavy crude well yield.
(4) reuse method is easily achieved, and field operation is strong.
Specific embodiment
In order to which technical characteristic of the invention, purpose and beneficial effect are more clearly understood, now in conjunction in detail below
Embodiment carries out following detailed description to technical solution of the present invention, but should not be understood as the limit to enforceable range of the invention
It is fixed.
Embodiment 1
Present embodiments provide a kind of thinner compounded suitable for associated gas after driving desulfurization with steam, wherein with described
The total weight of thinner is 100% meter, it includes 5% fatty acid alkanol amides, 8% alkyl phenol polyoxyethylene ether, 6%
Fatty alcohol polyoxyethylene ether, 2% polyoxyethylated alkyl alcohol -10 and surplus clear water.
Specific preparation process is as follows for the thinner provided by the present embodiment：
According to the proportion, successively by fatty acid alkanol amides, alkyl phenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, polyoxy
Vinyl alkyl alcohol ether -10 is added in blending tank, mixes 8 hours at room temperature, obtains viscosity reduction active component；
By gained, the viscosity reduction active component is added in the clear water of target proportion (79%) again, obtains described be suitable for and steaming
Vapour drives the thinner of associated gas compounding after desulfurization.
Embodiment 2
Present embodiments provide it is a kind of using steam drive associated gas after desulfurization and carry out viscous crude handle up the method for well viscosity reduction, packet
Include following steps：
Targeted viscous crude handles up well for brocade 45-023-223 in the present embodiment, which is 11100mPas,
During normal production because crude oil is sticky, the high 0.9MPa of Oil Well Back Pressure, the production that need to mix oil (the near 0.6MPa of back pressure), and be laminated at present
Power is 2.0MPa (original formation pressure 6.7MPa), and strata pressure is low, and steam injection produces after handling up, and fluid supply capacity is poor, Liquid output
For 7 sides or so (the initial stage Liquid output that drives a well is 22 sides), it is contemplated that implement steam injection, steam injection amount is 1500 sides.
Before epicycle steam injection, implements direct steam and drive associated gas compound chemical medicament measure after desulfurization.Specific implementation process
Method is as follows：
1, brocade 45-023-223 steam injection is constructed, the complete well of instlated tubular.
2, steam drive association desulfurization point gas vent connect movable steam injection tube line to heat note station, by heat infuse pipe network and
Activity injection pipeline is connected to the bright and beautiful well site 45-023-223.
3, the activity injection pipeline outlet connection pressure fan of the bright and beautiful well site 45-023-223 connection or other gas specifics are set
It is standby, then injection well is connected to by special equipment.
4, open steam drive association desulfurization point gas vent air-supplying valve, by steam injection movable pipeline enter pressure fan or
It is injected into well after the pressurization of gas specific equipment by instlated tubular.
5, miscible than being 40 according to associated gas after steam drive desulfurization and steam injection amount:1 design associated gas injection rate is 60,000
Side.1500 side of associated gas gas injection rate cooperates 1 side's thinner after driving desulfurization according to steam, prepares being applicable in for the offer of embodiment 1
Associated gas compounds after driving desulfurization with steam 40 tons of thinner.
Powder performance：It is 7 in 50 DEG C and oil-water ratio:When 3, the viscosity break ratio to bright and beautiful 45 blocks of viscous crude is 96.7%.It is adopted at 60 DEG C
Oil water interfacial tension is measured with hanging drop method, interfacial tension is 3.86 × 10-4mN·m-1。
6, after injection steam drives 20,000 side of association desulfurization associated gas, stop infusing, inject 20 tons of chemical agent, reinject steam
20,000 side of association desulfurization associated gas is driven, stops infusing, injects 20 tons of chemical agent, steam is reinjected and drives association desulfurization associated gas 20,000
Side.Stop injection, steam injection after boiling in a covered pot over a slow fire well 2-4 hours.
7,1500 side of steam injection boils in a covered pot over a slow fire well, and lower pump production, the initial stage Liquid output that drives a well is 16 sides, and after driving a well 40 days, Liquid output is stablized
In 11 sides or so, production fluid oil mixing with water, back pressure shows that this method achieves preferable energization and viscosity reducing effect in 0.5MPa.
Claims (16)
1. a kind of thinner compounded suitable for associated gas after driving desulfurization with steam, which is characterized in that be suitable for and steaming with described
The total weight for the thinner that associated gas compounds after vapour drive desulfurization is 100% meter, and it includes having in viscosity-reducing performance for 10-30%
Property surfactant, 1-5% have foam performance neutral surface active agent and excess water.
2. thinner according to claim 1, which is characterized in that neutral surface active agent's packet with viscosity-reducing performance
Include the combination of one or more of fatty acid alkanol amides, alkyl phenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether.
3. thinner according to claim 2, which is characterized in that neutral surface active agent's packet with viscosity-reducing performance
Include fatty acid alkanol amides, alkyl phenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether.
4. thinner according to claim 1, which is characterized in that neutral surface active agent's packet with foam performance
Include polyoxyethylated alkyl alcohol -8, polyoxyethylated alkyl alcohol -10, polyoxyethylated alkyl alcohol -15, polyxyethylated alcohol
The combination of one or more of ether -20 and polyoxyethylated alkyl alcohol -22.
5. thinner according to claim 4, which is characterized in that the neutral surface active agent with foam performance is
Polyoxyethylated alkyl alcohol -10.
6. thinner according to claim 1-5, which is characterized in that the total weight with the thinner is
100% meter, it includes the fatty acid alkanol amides of 5-8%, the alkyl phenol polyoxyethylene ether of 5-10%, 3-7% poly alkyl alcohol
The polyoxyethylated alkyl alcohol -10 and excess water of ethylene oxide ether, 1-4%.
7. described in any one of claims 1-6 be suitable for and the preparation side for the thinner that associated gas compounds after steam drive desulfurization
Method comprising following steps：
After the neutral surface active agent with viscosity-reducing performance, the neutral surface active agent with foam performance are mixed according to the proportion
Obtain viscosity reduction active component；
The viscosity reduction active component is added to again in the water of target proportion, obtains the associated gas after being suitable for driving desulfurization with steam
The thinner of compounding.
8. preparation method according to claim 7, which is characterized in that described be mixed into is mixed at room temperature, mixing
Time is 8h.
9. it is a kind of using steam drive associated gas after desulfurization and carry out viscous crude handle up the method for well viscosity reduction, which is characterized in that the method
Including：
By the steam drive desulfurization after associated gas and it is described in any one of claims 1-6 be suitable for and steam drive desulfurization after association
The thinner of gas compounding is successively alternately injected into viscous crude and handles up after well, and lower pump produces.
10. according to the method described in claim 9, it is characterized in that, the steam drives associated gas and viscous crude after desulfurization handles up well
The miscible ratio of steam injection amount is 30-60:1.
11. according to the method described in claim 9, it is characterized in that, described be suitable for compounding with associated gas after steam drive desulfurization
Thinner volume injection rate and steam drive desulfurization after associated gas volume injection rate ratio between the two be 1:800-1500.
12. according to the described in any item methods of claim 9-11, which is characterized in that this method uses slug formula injection technology.
13. according to the method for claim 12, which is characterized in that the slug formula injection technology is the injection of 5 slug formulas, i.e.,
Associated gas, thinner, steam drive associated gas after desulfurization after associated gas, thinner, steam drive desulfurization after steam drive desulfurization.
14. according to the method for claim 13, which is characterized in that associated gas slug amount is steam after every section of steam drives desulfurization
The 1/3 of associated gas total injection rate after drive desulfurization.
15. method described in 3 or 14 according to claim 1, which is characterized in that the corresponding leading portion of every section of thinner slug amount steams
The volume ratio of associated gas slug amount is 1 after vapour drive desulfurization:800-1500.
16. steam drives the application that associated gas after desulfurization is handled up in viscous crude in well viscosity reduction.
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