CN106996283A - The oil production method of spontaneous mixed phase hot fluid under a kind of hydrothermal cracking surge well - Google Patents
The oil production method of spontaneous mixed phase hot fluid under a kind of hydrothermal cracking surge well Download PDFInfo
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- CN106996283A CN106996283A CN201710435291.0A CN201710435291A CN106996283A CN 106996283 A CN106996283 A CN 106996283A CN 201710435291 A CN201710435291 A CN 201710435291A CN 106996283 A CN106996283 A CN 106996283A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/2406—Steam assisted gravity drainage [SAGD]
- E21B43/2408—SAGD in combination with other methods
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/243—Combustion in situ
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
Abstract
The oil production method of spontaneous mixed phase hot fluid, is related to oil extraction in oil field technical field under a kind of hydrothermal cracking surge well.Catalyst for cracking and steam are injected by oil reservoir by injection well and trigger aquathermolysis, then carry out vexed well and oil flow production, mixed phase heated fluid generator and carry out completion under injection well lower going-into-well and arrange supporting ground feed system, carry out displacement oil recovery, this method passes through hydrothermal cracking oil flow production, the near wellbore zone viscous crude for being difficult to flow originally can be enable to produce, injection pressure is reduced for the injection of follow-up mixed phase hot fluid, and effectively viscous crude can be modified by injecting mixed phase hot fluid, reduce heavy in viscous crude, colloid, asphalt content, the remote well area viscous crude of script is set to be driven, extraction, it is combined by two methods to nearly well in Heavy Oil Reservoir, remote well area viscous crude difference viscosity reduction, oil recovery can be effectively increased, rate of oil production, reduce viscous crude, super-heavy oil deposit cost of winning.
Description
Technical field
The present invention relates to oil extraction in oil field technical field, spontaneous mixed phase hot fluid under more particularly to a kind of hydrothermal cracking surge well
Oil production method.
Background technology
Viscous crude heavy point content is high, causes viscosity high, poor fluidity, based on strong sensitivity characteristic of the viscosity of thickened oil to temperature,
Oil recovery by heating method is typically considered the maximally effective means of production of heavy oil reservoir, and China's major part oil field is in steam soak mode
Heavy crude producing, obtains good economic benefit, but under the conditions of steam injection, viscosity of thickened oil decline it is simply temporary transient, with injection and
Thermal loss in recovery process, temperature drop, viscosity of thickened oil gradually gos up, and brings a series of to wellbore lift and terrestrial techniques
It is difficult.
Under the conditions of 300 DEG C of high temperature above, thermal cracking can occur for the heavy component in viscous crude, and the crude oil of Long carbon chain can be cracked
The hydro carbons that light oil and various lightweights for short carbon chain divide, during heavy oil heat production, because temperature is extremely difficult to 300 DEG C, because
This splitting action is very faint, now main to occur Low Temperature Thermal into ripening reaction and aquathermolysis, and aquathermolysis is accounted for
Leading position, hydrothermal cracking refers to that water chemically reacts with some active components of viscous crude under high-temperature and high-pressure conditions, changes viscous crude
Molecular structure, finally makes heavy, colloid, asphalt content reduction, saturated hydrocarbons, aromatic hydrocarbon content increase, so as to reach modification drop
Viscous purpose.
Aquathermolysis is very slow and complicated, is extremely difficult to modify the purpose of viscous crude by this spontaneous process, because
This will add catalyst for cracking to change the reaction mechanism mechanism of reaction, accelerate reaction speed, for thick oil hydrothermal cracking technique, lot of domestic and international
Research is directed to developing efficient transition-metal catalyst, under the conditions of steam injection, and contained mineral matter is one in itself in stratum
Cheap catalyst is planted, thick oil hydrothermal cracking reaction can be promoted, in the world generally by such a heterogeneous catalysis based on mineral
Agent is referred to as geology catalytic action, although oil reservoir minerals catalytic action is smaller, the association being catalyzed with cheap cost and its chemical agent
Same-action, the advanced subject as current hydrothermal cracking technology.
The present invention combines above-mentioned hydrothermal cracking viscosity reduction technology and the spontaneous mixed phase hot-fluid body technique in underground, forms one kind and is applied to
The significantly more efficient method of thickened oil recovery, enables the viscous crude, the super-viscous oil that are difficult to drive originally quickly to produce.
The content of the invention
The embodiment of the present invention provides a kind of oil production method of spontaneous mixed phase hot fluid under hydrothermal cracking surge well, passes through injection
Catalyst for cracking and high-temperature steam injection oil reservoir are triggered aquathermolysis by well, then carry out vexed well and oil flow production, then
Mixed phase heated fluid generator and carry out completion under injection well lower going-into-well and arrange supporting ground feed system, carry out displacement and adopt
Oil, this method can enable the near wellbore zone viscous crude for being difficult to flow originally produce by hydrothermal cracking oil flow production, be follow-up mixed
The injection of phase hot fluid reduces injection pressure, and effectively viscous crude can be modified by injecting mixed phase hot fluid, reduces viscous crude
Middle heavy, colloid, asphalt content, enable originally remote well area viscous crude driven, produced, be combined pair by two methods
Nearly well, remote well area viscous crude difference viscosity reduction, can be effectively increased oil recovery, rate of oil production, reduce viscous crude, surpass in Heavy Oil Reservoir
Heavy crude reservoir cost of winning.
To achieve these goals, the embodiment of the present invention provides spontaneous mixed phase hot fluid under a kind of hydrothermal cracking surge well
Oil production method, methods described includes：Catalyst for cracking and high-temperature steam are injected into oil reservoir by injection well triggers hydrothermal cracking anti-
Should, the reducing crude oil viscosity in stratum is made by aquathermolysis, is modified, increases its mobility；The temperature of the high-temperature steam is high
In the critical-temperature for triggering aquathermolysis；It is determined that the catalyst for cracking and high-temperature steam of injection reach it is vexed after preset range
Well；Closed time reaches that strata pressure is observed after preset range decides whether open flow；Then in injection well arrangement underground mixed phase heat
Fluid generator, then carries out completion step, and arranges supporting ground supply system, starts underground generation mixed phase hot fluid,
Carry out displacement oil recovery step, and from extraction well crude oil extraction.
The aquathermolysis includes：The mass fraction water-soluble nickel of catalyst for cracking 5% is injected in the injection well
Catalyst, injection rate is 0.05PV-0.15PV；High-temperature steam injection well is manufactured by firing equipment on the injection well ground
Under, or the distilled water of the electric heater heating injection for the downhole equipment for passing through the injection well is the high-temperature steam, will be described
High-temperature steam mixes initiation aquathermolysis with the catalyst for cracking in oil reservoir.
The injection high-temperature steam temperature range is 100-150 degrees Celsius, steam quality scope 70%-100%, the height
Warm steam injection is daily 50-200 tons.
The vexed well includes：Described preset range is that the catalyst for cracking and high-temperature steam enter near wellbore zone 5-10
Rice scope, ground closes production tree valve and carries out vexed well after the preset range is reached, the closed time scope is 7-15
My god, then catalyst for cracking, high-temperature steam and in-place oil carry out catalytic cracking reaction during this.
The oil flow production includes：Strata pressure is bottom pressure after catalytic cracking reaction after the vexed well, when described
Stressor layer carries out open flow oil recovery when being more than original formation pressure, is carried out when the strata pressure is less than original formation pressure follow-up
Oil recovery step.
Described stimulation work includes underground work and Ground Operation：
The underground work includes：Mixed phase heated fluid generator, packer, feeding pipe under lower going-into-well, the well successively
Lower mixed phase heated fluid generator depth of setting be 5-10 meter of oil reservoir top at, and to the packer progress seal；Wherein, it is described
Feeding pipe includes fuel feed pipe line, cooling water supply pipeline, oxidant supply pipeline and supply cable；Wherein, the well
Lower mixed phase heated fluid generator is by top connection component, fuel assembly, vaporization component, spiral boosting component and ejection assemblies group
Into；Feeding pipe is connected through packer with top connection component.
The Ground Operation includes：Ground supply system and underground mixed phase heated fluid generator are connected, described ground is supplied
Include oxidant feed system, fuel feed system, cooling water supply system, electric ignition system and monitoring system, institute to system
Oxidant feed system is stated for feeding the underground mixed phase heated fluid generator after oxidant is dried, filtered, and work is provided
Make pressure；The fuel feed system is used to fuel feeding the underground mixed phase heated fluid generator, and provides operating pressure；
The cooling water supply system is used to that the underground mixed phase heated fluid generator will to be fed after different types of water filtration, softening,
And operating pressure is provided；The electric ignition system is used to carry out electric ignition operation to the underground mixed phase heated fluid generator, makes
Above-mentioned oxidant, fuel and water form mixed phase burning in the mixed phase heated fluid generator of underground；The monitoring system is used for real-time
Monitor the oxidant feed system, fuel feed system, cooling water supply system, electric ignition system and underground mixed phase hot fluid
The specific works parameter that produces when generator works, and producing well produced gas gas component, such as hydrogen sulfide, oxygen, dioxy
Change carbon content, and then judge oil recovery situation and underground mixed phase heated fluid generator internal-combustion quality in oil reservoir, and can pass through
Monitoring system realizes remote control operation.
The beneficial effect of the embodiment of the present invention is：1) present invention is combined by aquathermolysis and mixed phase hot fluid
Recovered the oil, aquathermolysis acts near wellbore zone, mixed phase hot fluid acts on remote well area, aquathermolysis effect
Injection pressure during follow-up mixed phase hot fluid displacement can be reduced afterwards, and near, remote well exploitation is carried out to oil reservoir by two ways to have
Effect improves rate of oil production, increase recovery ratio, reduction production cost；2) mixed phase heated fluid generator in underground used in the present invention is straight
Connect lower going-into-well base oil and hide the spontaneous mixed phase hot fluid of position progress, being driven relative to steam reduces wellbore heat loss and steam to well
The corrosion of cylinder, and the tail gas of burning generation is directly injected into stratum and air will not be polluted, the viscosity reduction of mixed phase hot fluid is made
With high-temperature steam and carbon dioxide is, the simple steam viscosity reducing effect that relative steam drives is more preferably；3) present invention is relative to baked wheaten cake
The application of oil reservoir oil recovery technique is more flexible, is suitable for the oil reservoir of different geological conditions, and can stop in oil recovery process note at any time
Measure operation is adjusted, and combustion in situ method stops recovery gas injection after gas injection and needs to re-start underground ignition operation；4)
This method can apply to viscous crude, the super-heavy oil deposit primary oil recovery for being difficult to employ, and can also be used as viscous crude, super-heavy oil deposit three
It is secondary to recover the oil.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, makes required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those skilled in the art, it can also be obtained on the premise of not paying creative work according to these accompanying drawings other attached
Figure.
Fig. 1 is a kind of oil production method flow chart of spontaneous mixed phase hot fluid under hydrothermal cracking surge well.
Fig. 2 is five-spot pattern schematic diagram.
Fig. 3 is seven spot pattern schematic diagram.
Fig. 4 is shaft bottom firing equipment schematic diagram.
Fig. 5 is underground mixed phase heated fluid generator layout drawing.
Fig. 6 is ground supply system schematic.
Drawing reference numeral：1st, sleeve pipe 2, insulated tubing 3, electric heater 4, one way stop peturn valve 5, oil reservoir 6, thermometer 7,
Packer 8, supply cable 9, ground supply arrangement for connecting system 10, top connection component 11, fuel assembly 12, vaporization
Component 13, spiral boosting component 14, ejection assemblies 15, oxidant feeding pipe 16, fuel feed line 17, cooling water are supplied
To pipeline 18, oxidant feed system 19, fuel feed system 20, cooling water supply system 21, monitoring system 22, electricity
Ignition system 23, production tree 100, injection well 200, producing well.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on this
Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example is applied, the scope of protection of the invention is belonged to.
The present invention concrete technical scheme be：Oil extraction in oil field block have injection well and around producing well, injection well connect
It is connected to the equipment of injection chemical agent and injects the equipment of saturated vapor, or injection well is connected with setting for injection chemical agent
Standby and injection light water and distilled water equipment, injection well is connected with electric heating equipment can heat injection stratum in shaft bottom
Distilled water or light water.Producing well is connected with oil production equipment.
Step one, the mass fraction water-soluble nickel of catalyst for cracking 5% is injected into oil reservoir by injecting chemical agent equipment
Catalyst, injection rate is 0.05PV-0.15PV.
Step 2, high-temperature steam is injected into oil reservoir.The method of injection high-temperature steam has following two kinds：
Method 1, as shown in figure 4, insulated tubing 2 is sealed with the space of sleeve pipe 1 with packer, while in downhole equipment electrical heating
Device 3, distilled water or light water are injected from insulated tubing 2, heat the distilled water or light water of injection, control the vapor (steam) temperature scope to be
100-150 degrees Celsius, steam quality scope 70%-100%, the high-temperature steam injection rate is daily 50-200 tons.High temperature steams
Vapour is mixed into oil reservoir near wellbore zone with catalyst for cracking, and aquathermolysis is produced to crude oil.
Method 2, casing tube space are sealed with packer, and ground injection saturated vapor equipment is connected with injection well well head,
Saturated vapor equipment is injected by ground to generate under steam and injection well, it is 100-150 degrees Celsius to control vapor (steam) temperature scope, is steamed
Vapour mass dryness fraction scope 70%-100%, the high-temperature steam injection rate is daily 50-200 tons.High-temperature steam is with entering the nearly well of oil reservoir
Band is mixed with catalyst for cracking, and aquathermolysis is produced to crude oil.
Step 3, after it is determined that catalyst for cracking and high-temperature steam enter 5-10 meter of injection well near wellbore zone scope, closing
Connect production tree valve and carry out vexed well, the closed time scope is 7-15 days, then during this catalyst for cracking, high-temperature steam and
In-place oil carries out catalytic cracking reaction.
Step 4, closed time, which reaches, observes strata pressure after preset range, strata pressure is well after catalytic cracking reaction
Bottom pressure, open flow oil recovery is carried out when the strata pressure is more than original formation pressure, when the strata pressure is less than primitively
Follow-up oil recovery step is carried out during stressor layer.
Step 5, after vexed well or open flow terminates, underground equipment is taken out and stimulation work is carried out, and stimulation work includes underground
Operation and Ground Operation：
Wherein described underground work includes：Mixed phase heated fluid generator, packer, feeding pipe under lower going-into-well successively, and
The packer is carried out to seal, as shown in figure 5, arranging schematic diagram, underground mixed phase hot-fluid for underground mixed phase heated fluid generator
Body generator is made up of five parts, is respectively：Top connection component 10, fuel assembly 11, vaporization component 12, spiral boosting group
Part 13, ejection assemblies 14；The underground mixed phase heated fluid generator depth of setting be 5-10 meter of oil reservoir top at, feeding pipe and
Underground mixed phase heated fluid generator is connected by ground supply arrangement for connecting system 9；
The Ground Operation includes connection ground supply system and underground mixed phase heated fluid generator, as shown in fig. 6, described
Ground supply system include oxidant feed system 18, fuel feed system 19, cooling water supply system 20, monitoring system 21
With electric ignition system 22；The ground supply system is connected by production tree 23 with feeding pipe.
Step 6, then begins to underground generation mixed phase hot fluid and carries out displacement oil recovery, and the crude oil extraction from producing well.
Fig. 1 is the method overall flow figure of the embodiment of the present invention, as shown in figure 1, this method includes：
101st, crude oil aquathermolysis is triggered by injecting catalyst for cracking and high-temperature steam into oil reservoir
102nd, determine that the catalyst for cracking and high-temperature steam of injection reach vexed well after preset range
103rd, oil flow production is carried out when strata pressure is more than original formation pressure
104th, strata pressure does not have blowing less than original formation pressure after blowing terminates or after vexed well, carries out stimulation work
105th, oxidant, water, fuel are supplied to underground heated fluid generator and carries out underground mixed phase burning, inject mixed to oil reservoir
Phase hot fluid carries out the displacement of reservoir oil
Wherein 101 can include：When the injection well injects high-temperature steam, first distilled water is injected or common from oil pipe
Water, casing tube space is sealed with packer, while in downhole equipment electric heater, the distilled water or light water of injection are heated,
It is 100-150 degrees Celsius to control vapor (steam) temperature scope, steam quality scope 70%-100%, and the high-temperature steam injection rate is every
Its 50-200 tons.High-temperature steam is mixed into oil reservoir near wellbore zone with catalyst for cracking, and aquathermolysis is produced to crude oil.
Wherein 101 can also include：When the injection well injects high-temperature steam, casing tube space is made of packer
Envelope, ground injection saturated vapor equipment is connected with injection well well head, is generated by ground steaming plant under steam and injection well, control
Vapor (steam) temperature scope processed is 100-150 degrees Celsius, steam quality scope 70%-100%, and the high-temperature steam injection rate is daily
50-200 tons.High-temperature steam is mixed into oil reservoir near wellbore zone with catalyst for cracking, and aquathermolysis is produced to crude oil.
The downhole electric heater of the embodiment of the present invention heats distilled water, the equipment that light water is used, injection technology parameter, note
It is all mature technology to enter structure arrangement of well etc., is not belonging to the scope of the present invention.Injection technology parameter include pressure, temperature,
Flow velocity, time etc..
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Embodiment 1：
One, certain oil field block, 1700 meters of reservoir depth, 50 degrees Celsius of reservoir temperature, 12 meters of core intersection, viscosity of crude
44000 mpas, 17.5 MPas of original formation pressure.Water-drive oil recovery had been carried out, but water injection pressure is big, and water injection rate is small, oil
Available reserves is smaller in layer, current 33 MPas of water injection pressure, and water injection rate is 5 cubic metres/day, and current recovery ratio is 2%.
Refering to Fig. 2.The first step：Oil-producing region well pattern is improved, using five-spot pattern, injection well 100 around there are 4 mouthfuls in centre
200,4 mouthfuls of rectangular arrangements of producing well of producing well.Injection well 100 has 100-150 meters away from the producing well 200 relatively entered, away from farther out
Producing well 200 has 140-212 meters.The present embodiment is that have 100 meters away from nearer producing well 200, is had away from producing well 200 farther out
140 meters.The equipment that injection well is connected with injection distilled water, injection well is connected with electric heating equipment, and producing well is connected with oil recovery and set
It is standby.
Second step：Refering to Fig. 4,5% mass fraction water-soluble Raney nickel is injected to injection well, injection rate is 0.05PV,
Distilled water, the ton day of flow 60 are injected then to injection well.Distilled water is heated to be high-temperature steam by shaft bottom electric heater, heater
50 to 70 kilowatts of power is adjustable, and vapor (steam) temperature is controlled in 100 degrees Celsius, steam quality scope 70% by thermometer.
3rd step：It is 6 days to inject the high-temperature steam time, subsequent vexed well 7 days.
4th step：20 MPas of strata pressure is observed after vexed well, open flow operation is carried out, open flow continues 10 days, and the open flow stage goes out
50 tons of liquid measure, moisture content 4%.
5th step：Clean-out service is carried out to injection well.
6th step：Refering to Fig. 5, mixed phase heated fluid generator, packer, the confession under lower going-into-well successively in injection well after well-flushing
To pipeline, underground mixed phase heated fluid generator depth of setting is that 5 meters of oil reservoir top is located, and packer progress is sealed, wherein firing
Expect supply pipeline, cooling water supply pipeline, oxidant supply pipeline and supply cable inside feeding pipe.
7th step：Ground supply system is arranged, and carries out underground mixed phase heated fluid generator ignition operation, is set using above-mentioned
Standby to be injected by injection well to oil reservoir in the progress displacement of reservoir oil of mixed phase hot fluid, injection mixed phase hot fluid, high-temperature steam amount is daily 20
Ton, amount of carbon dioxide is daily 3 tons, and injection pressure is 19 MPas.
Embodiment 2：
One, certain oil field block, 2200 meters of reservoir depth, 70 degrees Celsius of reservoir temperature, 20 meters of core intersection, viscosity of crude
75000 mpas, 19 MPas of original formation pressure.Because oil viscosity is excessive, crude oil does not have mobility in the earth formation,
Exploitation belongs to primary oil recovery at present.
The first step：Refering to Fig. 3, oil-producing region well pattern is improved, using seven spot pattern, injection well 100 around there are 6 mouthfuls in centre
200,6 mouthfuls of producing wells of producing well are into hexagonal array.Injection well 100 has 100-150 meters away from the producing well 200 relatively entered, away from farther out
Producing well 200 have 140-212 meters.The present embodiment is that have 120 meters away from nearer producing well 200, is had away from producing well 200 farther out
170 meters.The equipment that injection well is connected with injection distilled water, injection well is connected with electric heating equipment, and producing well is connected with oil recovery and set
It is standby.
Second step：Refering to Fig. 4, the mass fraction water-soluble Raney nickel of catalyst for cracking 5%, injection rate are injected to injection well
For 0.1PV, distilled water, the ton day of flow 100 are injected then to injection well.Distilled water is heated to be high-temperature steam by shaft bottom electric heater,
50 to 70 kilowatts of the power of heater is adjustable, and vapor (steam) temperature is controlled in 120 degrees Celsius, steam quality 90% by thermometer.
3rd step：It is 12 days to inject the high-temperature steam time, subsequent vexed well 15 days.
4th step：23 MPas of strata pressure is observed after vexed well, open flow operation is carried out, open flow continues 14 days, and the open flow stage goes out
65 tons of liquid measure, moisture content 6%.
5th step：Repeat second, third, the 4th step is until strata pressure is less than original formation pressure, then this phase after vexed well
Between 1200 tons of open flow stage total liquid outlet quantity, total moisture content 8%, then to injection well carry out clean-out service.
6th step：Refering to Fig. 5, mixed phase heated fluid generator, packer, the confession under lower going-into-well successively in injection well after well-flushing
To pipeline, underground mixed phase heated fluid generator depth of setting is that 10 meters of oil reservoir top is located, and packer progress is sealed, wherein firing
Expect supply pipeline, cooling water supply pipeline, oxidant supply pipeline and supply cable inside feeding pipe.
7th step：Ground supply system is arranged, and carries out underground mixed phase heated fluid generator ignition operation, is set using above-mentioned
It is standby that the progress displacement of reservoir oil of mixed phase hot fluid is injected to oil reservoir by injection well.Inject in mixed phase hot fluid, high-temperature steam amount is daily 50
Ton, amount of carbon dioxide is daily 12 tons, and injection pressure is 19 MPas.
Embodiment 3：
One, certain oil field block, 1400 meters of reservoir depth, 55 degrees Celsius of reservoir temperature, 14 meters of core intersection, viscosity of crude
23000 mpas, 12 MPas of original formation pressure had carried out water-drive oil recovery, current 11 MPas of water injection pressure, and water injection rate is
200 cubic metres/day, current recovery ratio is 27.2%.
The first step：Refering to Fig. 2, oil-producing region well pattern is improved, using five-spot pattern, injection well 100 around there are 4 mouthfuls in centre
200,4 mouthfuls of rectangular arrangements of producing well of producing well.Injection well 100 has 100-150 meters away from the producing well 200 relatively entered, away from farther out
Producing well 200 has 140-212 meters.The present embodiment is that have 100 meters away from nearer producing well 200, is had away from producing well 200 farther out
140 meters.The equipment that injection well is connected with injection distilled water, injection well is connected with electric heating equipment, and producing well is connected with oil recovery and set
It is standby.
Second step：Refering to Fig. 4, the mass fraction water-soluble Raney nickel of catalyst for cracking 5%, injection rate are injected to injection well
For 0.15PV, distilled water, the ton day of flow 80 are injected then to injection well.Distilled water is heated to be high-temperature steam by shaft bottom electric heater,
70 kilowatts of the power of heater, vapor (steam) temperature is controlled in 150 degrees Celsius, mass dryness fraction 100%, high-temperature steam injection oil by thermometer
Layer.
3rd step：It is 7 days to inject the high-temperature steam time, subsequent vexed well 10 days.
4th step：11 MPas of strata pressure is observed after vexed well, strata pressure is in debt.
5th step：Clean-out service is carried out to injection well.
6th step：Refering to Fig. 5, mixed phase heated fluid generator, packer, the confession under lower going-into-well successively in injection well after well-flushing
To pipeline, underground mixed phase heated fluid generator depth of setting is that 8 meters of oil reservoir top is located, and packer progress is sealed, wherein firing
Expect supply pipeline, cooling water supply pipeline, oxidant supply pipeline and supply cable inside feeding pipe.
7th step：Ground supply system is arranged, and carries out underground mixed phase heated fluid generator ignition operation, is set using above-mentioned
It is standby that the progress displacement of reservoir oil of mixed phase hot fluid is injected to oil reservoir by injection well.Inject in mixed phase hot fluid, high-temperature steam amount is daily 150
Ton, amount of carbon dioxide is daily 20 tons, and injection pressure is 12 MPas.
Above example is only to the technical scheme for illustrating the embodiment of the present invention, rather than its limitations；Although with reference to foregoing
The embodiment of the present invention is described in detail embodiment, it will be understood by those within the art that：It still can be with
Technical scheme described in foregoing embodiments is modified, or equivalent substitution is carried out to which part technical characteristic；And
These modifications are replaced, and the essence of appropriate technical solution is departed from the spirit and model of various embodiments of the present invention technical scheme
Enclose.Above embodiment is to illustrate the invention and not to limit the present invention.
Claims (10)
1. the oil production method of spontaneous mixed phase hot fluid under a kind of hydrothermal cracking surge well, it is characterised in that methods described includes：
Catalyst for cracking and steam are injected by oil reservoir by injection well and trigger aquathermolysis, and
It is determined that catalyst for cracking and steam described in injection reach vexed well after preset range, and
The closed time reaches progress oil flow production operation after preset range, and
After the oil flow production operation, stimulation work, including underground work and Ground Operation are carried out；Wherein described underground work
Including：Underground mixed phase heated fluid generator is arranged to the target injection well；Wherein described Ground Operation includes：Arrange that underground is mixed
The supporting ground feed system of phase heated fluid generator, and
Oxidant, fuel and water are fed to underground mixed phase heated fluid generator by ground supply system and carry out underground generation mixed phase
Hot fluid simultaneously injects oil reservoir and carries out displacement oil recovery, and from producing well crude oil extraction.
2. the oil production method of spontaneous mixed phase hot fluid under a kind of hydrothermal cracking surge well as claimed in claim 1, its feature exists
In described catalyst for cracking is 5% mass fraction water-soluble Raney nickel, and catalyst for cracking injection rate is 0.05PV-
0.15PV。
3. the oil production method of spontaneous mixed phase hot fluid under a kind of hydrothermal cracking surge well as claimed in claim 1, its feature exists
In described high-temperature steam temperature range is 100-150 degrees Celsius, steam quality scope 70%-100%, every meter of thickness oil reservoir
Inject 30-60 cubic metres of quantity of steam.
4. the oil production method of spontaneous mixed phase hot fluid under a kind of hydrothermal cracking surge well as claimed in claim 1, its feature exists
In described closed time scope is 7-15 days.
5. the oil production method of spontaneous mixed phase hot fluid under a kind of hydrothermal cracking surge well as claimed in claim 1, its feature exists
In, after described vexed well strata pressure be more than original formation pressure when select strata pressure after oil flow production, described vexed well small
Selection carries out follow-up displacement operation when original formation pressure.
6. the oil production method of spontaneous mixed phase hot fluid under a kind of hydrothermal cracking surge well as claimed in claim 1, its feature exists
In the underground work includes：Mixed phase heated fluid generator, packer, feeding pipe under lower going-into-well, the underground mixed phase successively
Heated fluid generator depth of setting be 5-10 meter of oil reservoir top at, and to the packer progress seal.
7. the oil production method of spontaneous mixed phase hot fluid under a kind of hydrothermal cracking surge well as claimed in claim 6, its feature exists
In the feeding pipe includes fuel feed pipe line, cooling water supply pipeline, oxidant supply pipeline and supply cable.
8. the oil production method of spontaneous mixed phase hot fluid under a kind of hydrothermal cracking surge well as claimed in claim 1, its feature exists
In the underground mixed phase heated fluid generator is by top connection component, fuel assembly, vaporization component, spiral boosting component and spray
Penetrate component composition.
9. the oil production method of spontaneous mixed phase hot fluid under a kind of hydrothermal cracking surge well as claimed in claim 1, its feature exists
In the Ground Operation includes connection ground supply system and underground mixed phase heated fluid generator, described ground supply system
Including oxidant feed system, fuel feed system, cooling water supply system, electric ignition system and monitoring system.
10. the oil production method of spontaneous mixed phase hot fluid under a kind of hydrothermal cracking surge well as claimed in claim 1, its feature exists
In the underground generation mixed phase hot fluid includes, and oxidant, fuel and water is injected to underground by ground supply system, in well
Lower completion mixed phase burning, and mixed phase hot fluid is generated, it is subsequently injected into progress displacement oil recovery in oil reservoir.
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| CN114718532A (en) * | 2022-03-10 | 2022-07-08 | 西南石油大学 | Method for exploiting deep thick oil by catalyzing and heating to assist thick oil in-situ modification |
| CN114718532B (en) * | 2022-03-10 | 2023-04-25 | 西南石油大学 | Method for exploiting deep thick oil by in-situ modification of thick oil assisted by catalytic heating |
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