CN110043235A - A kind of thick oil filling vaporization method burnt using underground supercritical water - Google Patents
A kind of thick oil filling vaporization method burnt using underground supercritical water Download PDFInfo
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- CN110043235A CN110043235A CN201910436446.1A CN201910436446A CN110043235A CN 110043235 A CN110043235 A CN 110043235A CN 201910436446 A CN201910436446 A CN 201910436446A CN 110043235 A CN110043235 A CN 110043235A
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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
- E21B43/164—Injecting CO2 or carbonated water
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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
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/243—Combustion in situ
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/70—Combining sequestration of CO2 and exploitation of hydrocarbons by injecting CO2 or carbonated water in oil wells
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
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- Life Sciences & Earth Sciences (AREA)
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- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Spray-Type Burners (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention discloses a kind of thick oil filling vaporization methods burnt using underground supercritical water, it include: that continuous conduit is lowered into horizontal well by (1) from gas injection import, continuous conduit is separately connected water pot, fuel tank, combustion adjuvant tank on ground, it is sequentially connected preheater, igniter, steam generator in underground, continuous conduit is also respectively connected with power supply and signal picker positioned at ground；(2) with continuous conduit by organic-fuel, combustion adjuvant, water and power Transmission to underground, preheater makes water reach supercritical temperature, organic-fuel, combustion adjuvant burn under the super critical condition of water, and the water for being injected into underground from well head is constantly converted into steam by injection oil reservoir；(3) control downhole steam generator continuous operation and technical parameter rationally by ground regulation；(4) underground heating crude oil is produced by same well cylinder or displacement to offset well.The principle of the invention is reliable, meets the needs of heavy oil exploitation via steam injection, has wide industrial applications prospect.
Description
Technical field
The present invention relates to the methods that field of oil field oil extraction improves heavy crude well yield and oil recovery factor, more particularly to one
The thick oil filling vaporization method that kind is burnt using underground supercritical water.
Background technique
China's viscous crude is resourceful, but Oil Reservoir Types are more, and buried depth changes greatly.Heat extraction by steam injection is still current exploitation
The major technique of viscous crude accounts for 60% or more of viscous crude production total output.Current exploitation via steam injection technology is mainly gulped down including steam
It spits, steam drives, steam assisted gravity drainage, the collaboration injection mode of steam and solvent and steam and gas.
The application depth of cyclic steam injection tech reaches 1800 meters at present, and the higher steam of recovery ratio drives and SAGD technology master
It applies in the oil reservoir of shallow-layer and mid-deep strata (< 1200 meters).For deep layer (> 1200 m) and ultra deep (> 3000m) viscous crude oil
Hiding, using ground steam injection technology, since wellbore heat loss is big, it is difficult to steam quality and heat content required for being obtained in shaft bottom
Value significantly limits the efficiency and Economic Application of the heat extraction by steam injection technology such as SAGD and steam drive.For realize deep-well and
The Efficient Development of ultradeep well heavy crude reservoir, the invention proposes the sides that steam is generated in the pit shaft close to target reservoir depth
Method.
Summary of the invention
The purpose of the present invention is to provide a kind of thick oil filling vaporization method burnt using underground supercritical water, this method is former
Reason is reliable, by coiled tubing by organic-fuel, combustion adjuvant, water and power Transmission to underground, and by the temperature, pressure etc. of underground
Signal is transmitted to ground, and the continuous operation and technical parameter to downhole steam generator carry out real-time monitoring and control, thus full
The needs of sufficient heavy oil exploitation via steam injection have wide industrial applications prospect.
To reach the above technical purpose, the present invention uses following technical scheme.
It is a kind of using underground supercritical water burn thick oil filling vaporization method, successively the following steps are included:
(1) continuous conduit is lowered into horizontal well from gas injection import, there is conveying combustion adjuvant, combustion in the continuous conduit respectively
Material, the access of water and the access that transmits electric power with signal；Continuous conduit ground respectively pass through pump connection water pot, fuel tank,
Combustion adjuvant tank is sequentially connected preheater, igniter, steam generator in underground, which is also respectively connected with positioned at ground
Power supply and signal picker；
(2) with continuous conduit by organic-fuel, combustion adjuvant, water and power Transmission to underground, preheater makes water reach overcritical temperature
Degree, organic-fuel, combustion adjuvant burn under the super critical condition of water, generate carbon dioxide and water, the fuel constantly entered make
Supercriticality persistently exists, and the water for being injected into underground from well head is constantly converted into steam, these pressure and temperatures are sufficiently high
Steam is by injection oil reservoir；
(3) signals such as temperature, pressure of underground are transmitted to ground by continuous conduit, make underground steam by ground regulation
Device continuous operation and technical parameter are rationally controlled；
(4) underground heating crude oil is produced by same well cylinder or displacement to offset well.
There are conveying combustion adjuvant, fuel, the access of water and conveying electricity in the step (1), in the continuous conduit respectively
The access of power and signal, using mineral insulation guarantee transmit electric power between the access of signal and other fluids it is relatively independent mutually not
It influences, various combination of channels ensure that the condition of removing in continuous conduit, be advantageously implemented Operating Pressure.
In the step (2), the organic-fuel can be the flowable organic substance such as oils, alcohols, biological species, note
Organic-fuel, combustion adjuvant and the water entered reaches rational proportion, keeps thermodynamic equilibrium, just combustion continuation can be made to carry out.
In the step (3), obtain downhole steam generator continuous operation and technical parameter rationally by ground regulation
Control, refers to: according to the signals such as the temperature of underground, pressure, the mixing ratio of the fuel, combustion adjuvant and water that inject by adjusting ground
, oil reservoir is injected after the temperature, pressure, the degree of superheat required by reaching the steam generated.
In the step (4), underground heating crude oil is produced by same well cylinder or displacement to offset well, refers to heating
Crude oil, steam condensate, injection gas and stratum associated gas are lifted by the flow string and down-hole pump of the tripping in well or offset well
It is raised to ground.
Combustion reaction is placed in shaft bottom oil reservoir position by the present invention, and generated heat is completely used for oil reservoir heating, the thermal efficiency
Close to 100%.Contain a small amount of carbon dioxide in generated steam, is conducive to improve thickened oil recovery efficiency after injecting oil reservoir.
The present invention can be used for the straight well, directional well, horizontal production well, branch horizontal well steam injection of thickened oil recovery, due to pit shaft
It is low-temperature condition, nitrogen-gas heat-insulating can be used, i.e., fill the upper space of oil well, with nitrogen to prevent heat loss.
Steam generator device miniaturization of the present invention, whole process are continuous conduit, realize Operating Pressure using wellhead blowout preventor,
Turn to adopt without kill-job, not polluted reservoir.
Oil jacket annulus of the present invention can according to need, and can also infuse non-condensing gas, hydrocarbon, chemical addition agent
Deng.
The present invention is as follows in the basic principle that underground generates supercritical water steam:
By in the burner of the supercritical water under oxygen, fuel (aqueous solution of such as methanol) and water injection well, chamber pressure is protected
It holds more than the critical pressure (22.1MPa) of water, has benefited from the unique solvent properties of supercritical water and Heat and Mass Transfer Characteristics, it can be with
Realize the high performance clean burning of fuel, flame temperature reaches 600 DEG C or more.Flame and water directly blend heat exchange, hot fluid parameter
It is easy to adjust, and complicated wall-type heat exchange face is not needed, thus it is compact-sized, appropriate it can be arranged in underground.Using oxygen-enriched
It burns, there is no nitrogen in the hot fluid of generation, non-condensing gas ratio is controllable.Combustion product water and carbon dioxide etc. all can be with
It injects in oil reservoir, on the one hand not to environmental emission flue gas, does not generate the atmosphere pollution such as SOx, NOx；On the other hand, there is no conventional
The flue gas loss (up to 20%) of injection boiler, the thermal efficiency are high.In addition, carbon dioxide injects in viscous crude also together with supercritical water
Gas mixed phase viscosity reduction and other effects can be generated, is conducive to improve recovery ratio.
Detailed description of the invention
Fig. 1 is a kind of thick oil filling vaporization method flow diagram to be burnt using underground supercritical water.
In figure: 1- gas injection well head；2- casing；3- continuous conduit；4- nitrogen-gas heat-insulating；5- steam flow；6- screen casing；7- is combustion-supporting
Agent tank；8- water pot；9- preheater；10- igniter；11- steam generator；12- steam (vapor) outlet；13- pump；14- fuel tank；15-
Signal picker；16- power supply.
Specific embodiment
The present invention is further illustrated below according to attached drawing and example, in order to facilitate understanding by those skilled in the art this hair
It is bright.It should be apparent that the present invention is not limited to the ranges of specific embodiment, for those skilled in the art,
As long as various change is in the spirit and scope of the present invention that the attached claims limit and determine, in the column of protection.
Referring to Fig. 1.
It is a kind of using underground supercritical water burn thick oil filling vaporization method, successively the following steps are included:
(1) continuous conduit 3 is lowered into horizontal well from gas injection import 1, continuous conduit passes through 13 connection water of pump on ground respectively
Tank 8, fuel tank 14, combustion adjuvant tank 7 are sequentially connected preheater 9, igniter 10, steam generator 11, the continuous conduit in underground
It is also respectively connected with the power supply 16 and signal picker 15 positioned at ground；
(2) with continuous conduit by organic-fuel, combustion adjuvant, water and power Transmission to underground, organic-fuel, combustion adjuvant are in the super of water
It burns under critical condition, generates carbon dioxide and water, the fuel constantly entered have supercriticality persistently, infused from well head
The water entered to underground is constantly converted into steam, these steam by steam (vapor) outlet 12, then through screen casing 6 by injection oil reservoir (see Fig. 1
Shown in steam flow 5)；Since pit shaft is low-temperature condition, using nitrogen-gas heat-insulating 4, i.e., filled between casing 2 and oil pipe with nitrogen
Upper space；
(3) signals such as temperature, pressure of underground are transmitted to ground by continuous conduit, make underground steam by ground regulation
Device continuous operation and technical parameter are rationally controlled；
(4) underground heating crude oil is produced by same well cylinder or displacement to offset well.
Embodiment
Certain oilfield horizontal well vertical depth 2500m, the length of horizontal segment are 400m.30 meters of core intersection, 1000 milli of permeability reaches
West, oil saturation 60%, crude oil deaeration viscosity are 40000mPa.s.It carries out steam injection to the well to handle up production, except ground
The construction installation of process facility is outer, selects suitable steam injection well head, installs inside the coiled tubing for being Φ 70mm with an outer diameter
Two minor diameter coiled tubings, one is that enclosed inside has the Φ 30mm of heating cable, electric heater and test cable continuously oily
Pipe, one is Φ 25mm coiled tubing.By Φ 70mm coiled tubing to material, electric energy needed for delivered downhole, convey to the ground
Signal.By underground supercritical steam generator, available underground steam pressure highest 40MPa, 400 DEG C of vapor (steam) temperature highest.
Nitrogen is injected in casing annulus simultaneously, for guaranteeing that the not upward channelling of steam causes heat loss, injects certain proportion to stratum
Nitrogen be also beneficial to expand underground steam swept volume.Steam injection rate can achieve 200 ton/days, accumulate 3000 tons of steam injection,
Continuous operation 15 days.Closing well is 5 days stewing after stopping note.Whole devices in well are proposed under the conditions of with pressure.Tripping in oil pick-up tube under the conditions of with pressure
Column turns pumping production.Decline to oil well output, when reaching period abandonment rate, proposes whole tubing strings in well, repeat above-mentioned operation
Process is handled up production until completing the multicycle.It handles up production by the multicycle, is suitble to carry out steam when reservoir pressure drops to and drives
Or after the pressure of steam assisted gravity drainage development scheme, on the basis of improving well pattern, development is continuously injected into and gives birth to
The development scheme of production improves the ultimate recovery of oil reservoir.
Claims (6)
1. it is a kind of using underground supercritical water burn thick oil filling vaporization method, successively the following steps are included:
Continuous conduit is lowered into horizontal well from gas injection import, there is conveying combustion adjuvant, fuel, water in the continuous conduit respectively
Access and the access that transmits electric power with signal；Continuous conduit passes through pump connection water pot, fuel tank, combustion adjuvant on ground respectively
Tank is sequentially connected preheater, igniter, steam generator in underground, which is also respectively connected with the power supply positioned at ground
And signal picker；
With continuous conduit by organic-fuel, combustion adjuvant, water and power Transmission to underground, preheater makes water reach supercritical temperature,
Organic-fuel, combustion adjuvant burn under the super critical condition of water, generate carbon dioxide and water, and the fuel constantly entered makes super face
Boundary's state persistently exists, and the water for being injected into underground from well head is constantly converted into steam, the sufficiently high steam of these pressure and temperatures
By in injection oil reservoir；
The signals such as the temperature, pressure of underground are transmitted to ground by continuous conduit, connect downhole steam generator by ground regulation
Reforwarding row and technical parameter are rationally controlled；
Underground heating crude oil is produced by same well cylinder or displacement to offset well.
2. a kind of thick oil filling vaporization method burnt using underground supercritical water as described in claim 1, which is characterized in that institute
State in step (1), in the continuous conduit respectively have conveying combustion adjuvant, fuel, water access and transmit electric power and signal
Access guarantees relatively independent between the access of signal and other fluids be independent of each other that transmit electric power using mineral insulation.
3. a kind of thick oil filling vaporization method burnt using underground supercritical water as described in claim 1, which is characterized in that institute
It states in step (2), the organic-fuel is that oils, alcohols or the flowable organic substance of biological species, the organic-fuel of injection help
Combustion agent and water reach rational proportion, keep thermodynamic equilibrium, carry out combustion continuation.
4. a kind of thick oil filling vaporization method burnt using underground supercritical water as described in claim 1, which is characterized in that institute
It states in step (3), controls downhole steam generator continuous operation and technical parameter rationally by ground regulation, refer to:
According to the temperature of underground, pressure signal, the mixed proportion of the fuel, combustion adjuvant and water that inject by adjusting ground makes generation
Steam injects oil reservoir after reaching required temperature, pressure, the degree of superheat.
5. a kind of thick oil filling vaporization method burnt using underground supercritical water as described in claim 1, which is characterized in that institute
It states in step (4), underground heating crude oil is produced by same well cylinder or displacement to offset well, refers to crude oil, the steam of heating
Condensed water, injection gas and stratum associated gas give rise to ground by the flow string and down-hole pump of the tripping in well or offset well.
6. a kind of thick oil filling vaporization method burnt using underground supercritical water as described in claim 1,2,3,4 or 5, special
Sign is, this method is used for straight well, directional well, horizontal production well or the branch horizontal well steam injection of thickened oil recovery, using nitrogen every
Heat fills the upper space of oil well, with nitrogen to prevent heat loss.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910436446.1A CN110043235A (en) | 2019-05-23 | 2019-05-23 | A kind of thick oil filling vaporization method burnt using underground supercritical water |
| CA3080196A CA3080196A1 (en) | 2019-05-23 | 2020-05-04 | Heavy oil steam injection method using downhole supercritical water combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910436446.1A CN110043235A (en) | 2019-05-23 | 2019-05-23 | A kind of thick oil filling vaporization method burnt using underground supercritical water |
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| CN110043235A true CN110043235A (en) | 2019-07-23 |
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| CN201910436446.1A Pending CN110043235A (en) | 2019-05-23 | 2019-05-23 | A kind of thick oil filling vaporization method burnt using underground supercritical water |
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| CA (1) | CA3080196A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111520118A (en) * | 2020-06-12 | 2020-08-11 | 西南石油大学 | Recyclable heavy oil recovery method and system for heating injected solvent underground |
| CN112302598A (en) * | 2020-11-20 | 2021-02-02 | 西南石油大学 | System and method for generating steam underground in ultra-deep heavy oil reservoir |
| CN112557441A (en) * | 2020-11-30 | 2021-03-26 | 西南石油大学 | Experimental platform and method for influence of gas pipeline fire injection on safety of adjacent liquid hydrocarbon pipes |
| CN112664171A (en) * | 2020-12-23 | 2021-04-16 | 河南恒聚新能源设备有限公司 | Wind-solar-heat-hydrogen-storage integrated system for thermal recovery of thick oil steam in onshore oil field |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113701148B (en) * | 2021-08-31 | 2024-03-22 | 武汉武锅能源工程有限公司 | Supercritical hydrothermal combustion type multi-element hot fluid generating device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111520118A (en) * | 2020-06-12 | 2020-08-11 | 西南石油大学 | Recyclable heavy oil recovery method and system for heating injected solvent underground |
| CN112302598A (en) * | 2020-11-20 | 2021-02-02 | 西南石油大学 | System and method for generating steam underground in ultra-deep heavy oil reservoir |
| CN112302598B (en) * | 2020-11-20 | 2022-04-01 | 西南石油大学 | System and method for generating steam underground in ultra-deep heavy oil reservoir |
| CN112557441A (en) * | 2020-11-30 | 2021-03-26 | 西南石油大学 | Experimental platform and method for influence of gas pipeline fire injection on safety of adjacent liquid hydrocarbon pipes |
| CN112664171A (en) * | 2020-12-23 | 2021-04-16 | 河南恒聚新能源设备有限公司 | Wind-solar-heat-hydrogen-storage integrated system for thermal recovery of thick oil steam in onshore oil field |
| CN112664171B (en) * | 2020-12-23 | 2023-04-14 | 河南恒聚新能源设备有限公司 | Wind-solar-heat-hydrogen-storage integrated system for thermal recovery of thick oil steam in onshore oil field |
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| CA3080196A1 (en) | 2020-11-23 |
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