CN106246152B - Complex fault block heavy crude reservoir is handled up steam injection parameter optimization method - Google Patents
Complex fault block heavy crude reservoir is handled up steam injection parameter optimization method Download PDFInfo
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- CN106246152B CN106246152B CN201610685299.8A CN201610685299A CN106246152B CN 106246152 B CN106246152 B CN 106246152B CN 201610685299 A CN201610685299 A CN 201610685299A CN 106246152 B CN106246152 B CN 106246152B
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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
Abstract
The embodiment of the present application provides a kind of complex fault block heavy crude reservoir and handles up steam injection parameter optimization method, method includes the following steps: obtain target well reservoir pressure and initial steam injection intensity；According to the reservoir pressure and preset reservoir pressure and steam injection intensity corresponding relationship, the initial steam injection intensity is adjusted.Compared with prior art, the embodiment of the present application is no longer rely on the steam injection amount handled up of core intersection configuration period, but obtain first target well reservoir pressure and initial steam injection intensity；Then according to reservoir pressure and preset reservoir pressure and steam injection intensity corresponding relationship, initial steam injection intensity is adjusted, so that steam injection intensity can preferably meet the needs of heavy oil heating, to improve the recovery ratio of oil reservoir.In addition, in order to reach better effect, it can also according to actual needs, it is also an option that property optimizes steam injection mode, the intervention of auxiliary steam injection, steam injection mass dryness fraction and/or other steam injection parameters of handling up such as steam injection period of handling up.
Description
Technical field
This application involves Development of Viscous Crude Oil technical field, handle up steam injection more particularly, to a kind of complex fault block heavy crude reservoir
Parameter optimization method.
Background technique
The mode of steam soak is generally taken to exploit heavy crude reservoir at present.So-called steam soak be exactly first to
Oil well injects a certain amount of steam, is then shut off oil well for a period of time, and the thermal energy to steam is spread to oil reservoir, heavy crude reservoir flowing
Property become strong after, then open oil well and carry out thickened oil recovery.
In thickened oil steam-stimulated technology, the quality of oil reservoir steam injection parameter will have a direct impact on steam injection and imitate to the transformation of oil reservoir
Fruit influences period oil production.For wells in conventional heavy oil reservoir, oil reservoir steam injection parameter designing is fairly simple, generally according to core intersection
The steam injection amount that the configuration period handles up.
And for complex fault block heavy crude reservoir (such as super-heavy oil deposit, development late stage low pressure reservoirs and for many years develop
Form the channeling oil reservoir etc. in channeling channel), because its oil property, strata pressure and formation heterogeneity etc. influence, inject steam
It is easy the presence of the phenomenon for inhaling vapour unevenness, steam injection parameter is such as determined using usual manner, then will affect oil recovery.
Summary of the invention
A kind of complex fault block heavy crude reservoir of being designed to provide of the embodiment of the present application is handled up steam injection parameter optimization method, with
Improve oil recovery.
In order to achieve the above objectives, the embodiment of the present application provides a kind of complex fault block heavy crude reservoir and handles up steam injection parameter optimization
Method, comprising the following steps:
The reservoir pressure of acquisition target well and initial steam injection intensity；
According to the reservoir pressure and preset reservoir pressure and steam injection intensity corresponding relationship, the initial steam injection is adjusted
Intensity.
The complex fault block heavy crude reservoir of the embodiment of the present application is handled up steam injection parameter optimization method, described according to the oil reservoir pressure
Power and preset reservoir pressure and steam injection intensity corresponding relationship, adjust the initial steam injection intensity, comprising:
If the reservoir pressure of the target well is lower than preset first pressure value, the initial steam injection intensity is adjusted
For the first steam injection intensity value；
If the reservoir pressure of the target well is more than preset first pressure value, and is not higher than preset second pressure
Value, then be adjusted to the second steam injection intensity value for the initial steam injection intensity；
If the reservoir pressure of the target well is more than preset second pressure value, the initial steam injection intensity is adjusted
For the first steam injection intensity value.
The complex fault block heavy crude reservoir of the embodiment of the present application is handled up steam injection parameter optimization method, if the target well is straight
Well is then calculated using the following equation its initial steam injection intensity value:
Q1=π r2·h·Φ·s0·EA·hr
In formula, Q1For the initial steam injection intensity value of straight well, r is heating radius, and h is perforated hole well section length, EAInvolve for steam
Coefficient, Φ are reservoir porosity, s0For reservoir oil saturation, hr is net overall thickness ratio.
The complex fault block heavy crude reservoir of the embodiment of the present application is handled up steam injection parameter optimization method, further includes:
If the target well is horizontal well, it is calculated using the following equation its initial steam injection intensity value:
In formula, Q is the initial steam injection intensity value of horizontal well, and r is heating radius, and L is perforated hole well section length, and h is that oil reservoir is thick
Degree, EAFor steam sweep efficiency, Φ is reservoir porosity, s0For reservoir oil saturation.
The complex fault block heavy crude reservoir of the embodiment of the present application is handled up steam injection parameter optimization method, further includes:
The Oil Reservoir Types feature of the target well is obtained, the Oil Reservoir Types feature includes at least well type and well section is long
Degree；
According to the Oil Reservoir Types feature and preset characteristics of reservoirs and steam injection mode corresponding relationship, the target is determined
The steam injection mode of well.
The complex fault block heavy crude reservoir of the embodiment of the present application is handled up steam injection parameter optimization method, described according to the oil reservoir class
Type feature and preset characteristics of reservoirs and steam injection mode corresponding relationship, determine the steam injection mode of the target well, comprising:
If the target well is channeling well, steam injection mode is selected as combined steam injection mode；
If the target well is straight well, and of length no more than default first length of its perforated interval, then its steam injection mode
It is selected as single note steam injection mode；
If the target well is straight well, and its perforated interval length is more than default first length, then its steam injection side
Formula is selected as layer steam injection mode；
If the target well is horizontal well, and its horizontal section length is no more than default second length, then its steam injection side
Formula is selected as single note steam injection mode；Or
If the target well is horizontal well, and its net horizontal section is more than default second length, then its steam injection mode
It is selected as multiple spot steam injection mode.
The complex fault block heavy crude reservoir of the embodiment of the present application is handled up steam injection parameter optimization method, further includes:
Obtain the viscosity of crude of the target well；
Judge whether the viscosity of crude is more than preset viscosity number；
If it exceeds, it is determined that steam injection medium includes hot steam and auxiliary viscosity reduction gas.
The complex fault block heavy crude reservoir of the embodiment of the present application is handled up steam injection parameter optimization method, the auxiliary viscosity reduction gas
Including carbon dioxide.
The complex fault block heavy crude reservoir of the embodiment of the present application is handled up steam injection parameter optimization method, when the steam injection medium includes
When hot steam and auxiliary viscosity reduction gas, the injection rate of the auxiliary viscosity reduction gas is the 0.05~0.1 of the hot steam injection rate.
The complex fault block heavy crude reservoir of the embodiment of the present application is handled up steam injection parameter optimization method, further includes:
In injection, Wellhead steam injection mass dryness fraction is detected；
If the Wellhead steam injection mass dryness fraction deviates default steam quality value, injection temperature, the injection pressure of hot steam are adjusted
Power and/or steam injection intensity, so that the Wellhead steam injection mass dryness fraction maintains the default steam quality value.
The complex fault block heavy crude reservoir of the embodiment of the present application is handled up steam injection parameter optimization method, further includes:
Count steam injection amount and an oil increment handled up in the steam injection period；
According to the steam injection amount and oil increment relation curve set, judge under the steam injection amount, whether the oil increment reaches
To preset requirement, the preset requirement includes period gas oil ratio and period abandonment rate；
If reached, the injection in next steam injection period of handling up is carried out.
The complex fault block heavy crude reservoir of the embodiment of the present application is handled up steam injection parameter optimization method, further includes:
If the oil increment is not up to preset requirement under the steam injection amount；
Then cancel next handle up the steam injection period.
Compared with prior art, the embodiment of the present application is no longer rely on core intersection and configures the steam injection amount that the period handles up, but
The reservoir pressure of acquisition target well and initial steam injection intensity first；Then according to reservoir pressure and preset reservoir pressure and note
Vapour intensity corresponding relationship adjusts initial steam injection intensity, so that steam injection intensity can preferably meet the needs of heavy oil heating, thus
Improve the recovery ratio of oil reservoir.
In addition, in order to reach better effect, can also according to actual needs, it is also an option that property to steam injection mode,
The intervention of auxiliary steam injection, steam injection mass dryness fraction and/or other steam injection parameters of handling up such as steam injection period of handling up optimize.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present application, constitutes the embodiment of the present application
A part does not constitute the restriction to the embodiment of the present application.In the accompanying drawings:
Fig. 1 is that the complex fault block heavy crude reservoir of one embodiment of the application is handled up the flow chart of steam injection parameter optimization method；
Fig. 2 is steam injection parameter of handling up involved in another embodiment of the application；
Fig. 3 is CO in one embodiment of the application2Auxiliary soaking production curve figure；
Fig. 4 is development index comparison diagram under steam qualitys different in one embodiment of the application；
Fig. 5 is different steam qualitys and oil displacement efficiency change curve in one embodiment of the application.
Specific embodiment
For the purposes, technical schemes and advantages of the embodiment of the present application are more clearly understood, below with reference to embodiment and attached
Figure, is described in further details the embodiment of the present application.Here, the illustrative embodiments and their description of the embodiment of the present application are used for
It explains the embodiment of the present application, but is not intended as the restriction to the embodiment of the present application.
With reference to the accompanying drawing, the specific embodiment of the embodiment of the present application is described in further detail.
The steam injection parameter optimization method refering to what is shown in Fig. 1, the complex fault block heavy crude reservoir of the embodiment of the present application is handled up, including with
Lower step:
Step S101, the reservoir pressure of acquisition target well and initial steam injection intensity.
In the embodiment of the present application, initial steam injection intensity can be previously according to needing to set.One in the application is exemplary
In embodiment, suitable initial steam injection intensity value can be selected according to the type of target well.Such as:
If the target well is straight well, following formula can be used and calculate its initial steam injection intensity value:
Q1=π r2·h·Φ·s0·EA·hr
In formula, Q1For the initial steam injection intensity value of straight well, r is heating radius, and h is perforated hole well section length, EAInvolve for steam
Coefficient, Φ are reservoir porosity, s0For reservoir oil saturation, hr is net overall thickness ratio.
And if the target well is horizontal well, following formula can be used and calculate its initial steam injection intensity value:
In formula, Q is the initial steam injection intensity value of horizontal well, and r is heating radius, and L is perforated hole well section length, and h is that oil reservoir is thick
Degree, EAFor steam sweep efficiency, Φ is reservoir porosity, s0For reservoir oil saturation.
Step S102, according to the reservoir pressure and preset reservoir pressure and steam injection intensity corresponding relationship, institute is adjusted
State initial steam injection intensity.
Wherein, reservoir pressure and preset reservoir pressure can be as shown in table 1 below with steam injection intensity corresponding relationship:
Table 1
| Reservoir pressure (unit: Mpa) | Initial steam injection intensity (unit: t/m) |
| <0.2 | 130~160 |
| 0.2~0.8 | 100~120 |
| >0.8 | 70~110 |
In the exemplary embodiment of the application, it is described according to the reservoir pressure and preset reservoir pressure with
Steam injection intensity corresponding relationship adjusts the initial steam injection intensity, comprising:
If the reservoir pressure of the target well is lower than preset first pressure value, the initial steam injection intensity is adjusted
For the first steam injection intensity value；
If the reservoir pressure of the target well is more than preset first pressure value, and is not higher than preset second pressure
Value, then be adjusted to the second steam injection intensity value for the initial steam injection intensity；
If the reservoir pressure of the target well is more than preset second pressure value, the initial steam injection intensity is adjusted
For the first steam injection intensity value.
As shown in connection with fig. 2, in the application other embodiments, the steam injection parameter of handling up of optimization can also include steam injection side
Formula assists steam injection intervention, steam injection mass dryness fraction and/or handles up steam injection period etc..
In one embodiment of the application, when the steam injection parameter of handling up of optimization includes steam injection mode, complex fault block
Heavy crude reservoir is handled up steam injection parameter optimization method, can also include:
The Oil Reservoir Types feature of the target well is obtained, the Oil Reservoir Types feature includes at least well type and well section is long
Degree；
According to the Oil Reservoir Types feature and preset characteristics of reservoirs and steam injection mode corresponding relationship, the target is determined
The steam injection mode of well.Such as: if the target well is channeling well, steam injection mode is selected as combined steam injection mode；If
The target well is straight well, and of length no more than default first length of its perforated interval, then its steam injection mode is selected as single note note
Way of steam；If the target well is straight well, and its perforated interval length is more than default first length, then its steam injection mode
It is selected as layer steam injection mode；If the target well is horizontal well, and its horizontal section length is no more than default second length,
Then its steam injection mode is selected as single note steam injection mode；Or if the target well is horizontal well, and its net horizontal section is more than institute
Default second length is stated, then its steam injection mode is selected as multiple spot steam injection mode.
In the embodiment of the present application, single note is with thermal packer that one steam injection unit is apart from top to bottom；It is described
Layer steam injection be to be separated multiple steam injection units with thermal packer, steam injection is carried out one by one to each steam injection unit.
It is complicated when the steam injection parameter of handling up of optimization includes auxiliary steam injection intervention in one embodiment of the application
Fault block heavy crude reservoir is handled up steam injection parameter optimization method, can also include:
Obtain the viscosity of crude of the target well；
Judge whether the viscosity of crude is more than preset viscosity number；
Experiment and research shows that heavy crude reservoir of the viscosity of crude greater than 50000mPa.s generally belongs to super-heavy oil deposit,
Therefore, preset viscosity number can be set as 50000mPa.s.
If the viscosity of crude of the target well is more than in 50000mPa.s, it is determined that steam injection medium includes hot steam and auxiliary
Help viscosity reduction gas, that is to say, that auxiliary steam injection intervention is carried out, preferably to reduce viscosity of crude.One in the application is shown
In example property embodiment, the auxiliary viscosity reduction gas includes carbon dioxide.In the exemplary embodiment of the application, work as institute
State steam injection medium include hot steam and auxiliary viscosity reduction gas when, it is described auxiliary viscosity reduction gas injection rate be the hot steam inject
The 0.05~0.1 of amount.
In one embodiment of the application, when the steam injection parameter of handling up of optimization includes steam injection mass dryness fraction, complex fault block
Heavy crude reservoir is handled up steam injection parameter optimization method, can also include:
In injection, Wellhead steam injection mass dryness fraction is detected；
If the Wellhead steam injection mass dryness fraction deviates default steam quality value, injection temperature, the injection pressure of hot steam are adjusted
Power and/or steam injection intensity, so that the Wellhead steam injection mass dryness fraction maintains the default steam quality value.
From the different steam qualitys and oil displacement efficiency of development index comparison diagram and Fig. 5 under the oil reservoir difference steam quality of Fig. 4
Change curve can be seen that steam quality is bigger, and development index is higher, and oil displacement efficiency is better.However, when steam quality is more than 50%
After, ascensional range becomes, and needs the cost expended excessive at this time, therefore to guarantee that Reservoir With Steam mass dryness fraction is more suitable 50% when steam injection
Preferably.
It is complicated when the steam injection parameter of handling up of optimization includes handling up the steam injection period in one embodiment of the application
Fault block heavy crude reservoir is handled up steam injection parameter optimization method, can also include:
Count steam injection amount and an oil increment handled up in the steam injection period；
According to the steam injection amount and oil increment relation curve set, judge under the steam injection amount, whether the oil increment reaches
To preset requirement, the preset requirement includes period gas oil ratio and period abandonment rate；
If reached, the injection in next steam injection period of handling up is carried out, otherwise, then cancels next handle up the steam injection period.
Compared with prior art, the embodiment of the present application is no longer rely on core intersection and configures the steam injection amount that the period handles up, but
The reservoir pressure of acquisition target well and initial steam injection intensity first；Then according to reservoir pressure and preset reservoir pressure and note
Vapour intensity corresponding relationship adjusts initial steam injection intensity, so that steam injection intensity can preferably meet the needs of heavy oil heating, thus
Improve the recovery ratio of oil reservoir.In addition, in order to reach better effect, in the application other embodiments, according to actual needs,
It is also an option that property to steam injection mode, the intervention of auxiliary steam injection, steam injection mass dryness fraction and/or other steam injections of handling up such as steam injection period of handling up
Parameter optimizes.
The application has carried out experimental implementation in 3, certain oil field heavy oil block, achieves relatively good effect, concrete condition
Under such as:
Oil field shaerbuer mountain super-heavy oil deposit:
Certain oil field shaerbuer mountain super-heavy oil deposit, viscosity of crude 108000mPa.s, since viscosity leads to greatly very much steam injection life of handling up
Producing short cycle time is 2 months, and for period oil production between 300~400t, gas oil ratio is lower than 0.2.Pass through CO within 20152Auxiliary
The implementation of steam soak implements 15 wells in block, averagely extends the production time 60 days, and production per cycle increases by 200~300t, oil
Vapour ratio is increased to 0.35, achieves relatively good effect (as shown in Figure 3).
Oil field dune shape thin interbed heavy crude reservoir:
Certain oil field dune shape oil reservoir belongs to the thin interbed heavy crude reservoir of exploitation many years, and reservoir pressure coefficient is on 0.2 left side at present
The right side, due to long containing well section, general perforated interval span several years ago takes conventional steam injection, general steam injection amount is by oil 100 or more
For layer thickness design in 2000t or so, development effectiveness is general, is optimized recently by steam injection parameter, increases steam injection amount and to perforated hole
Section middle part blocked after up and down series of strata match steam injection amount respectively, implement 20 wells time in block, average gas oil ratio improves 0.12, week
Phase oil production increases 50t/ well.
Oil field dune shape multilayer shape edge-wa- ter reservoir:
Certain oil field dune shape oil reservoir belongs to multilayer shape edge-wa- ter reservoir, affixes one's name to development level well using upper layer and lower layer pastern at present,
Due to upper and lower oil-bearing series interlayer hypoplasia face, and average thickness is less than 5m, and partial region interlayer does not have a seal-off effect, therefore
Series of strata horizontal well is easy channeling up and down when steam injection is developed, and belongs to channeling oil reservoir.8 well of channeling in 2014, influences production 2 months,
By taking combined steam injection to the horizontal well in same flooding pattern since 2015, while stewing well drives a well steam injection simultaneously simultaneously,
Influence of the channeling to oil reservoir development effectively is slowed down, than 2014 same period routine steam injection method oil increment 3000t.
Particular embodiments described above has carried out further in detail the purpose of the application, technical scheme and beneficial effects
Describe in detail it is bright, it should be understood that being not used to limit this Shen the foregoing is merely the specific embodiment of the embodiment of the present application
Protection scope please, within the spirit and principles of this application, any modification, equivalent substitution, improvement and etc. done should all wrap
Containing within the scope of protection of this application.
Claims (11)
- The steam injection parameter optimization method 1. a kind of complex fault block heavy crude reservoir is handled up, which comprises the following steps:The reservoir pressure of acquisition target well and initial steam injection intensity；According to the reservoir pressure and preset reservoir pressure and steam injection intensity corresponding relationship, it is strong to adjust the initial steam injection Degree；Wherein,It is described according to the reservoir pressure and preset reservoir pressure and steam injection intensity corresponding relationship, adjust the initial steam injection Intensity, comprising:If the reservoir pressure of the target well is lower than preset first pressure value, the initial steam injection intensity is adjusted to the One steam injection intensity value；If the reservoir pressure of the target well is more than preset first pressure value, and is not higher than preset second pressure value, then The initial steam injection intensity is adjusted to the second steam injection intensity value；If the reservoir pressure of the target well is more than preset second pressure value, the initial steam injection intensity is adjusted to the Three steam injection intensity values.
- The steam injection parameter optimization method 2. complex fault block heavy crude reservoir according to claim 1 is handled up, which is characterized in that if The target well is straight well, then is calculated using the following equation its initial steam injection intensity value:Q1=π r2·h·Φ·s0·EA·hrIn formula, Q1For the initial steam injection intensity value of straight well, r is heating radius, and h is perforated hole well section length, EAInvolve for steam and is Number, Φ is reservoir porosity, s0For reservoir oil saturation, hr is net overall thickness ratio.
- The steam injection parameter optimization method 3. complex fault block heavy crude reservoir according to claim 1 is handled up, which is characterized in that also wrap It includes:If the target well is horizontal well, it is calculated using the following equation its initial steam injection intensity value:In formula, Q is the initial steam injection intensity value of horizontal well, and r is heating radius, and L is perforated hole well section length, and h is core intersection, EA For steam sweep efficiency, Φ is reservoir porosity, s0For reservoir oil saturation.
- The steam injection parameter optimization method 4. complex fault block heavy crude reservoir according to claim 1 is handled up, which is characterized in that also wrap It includes:The Oil Reservoir Types feature of the target well is obtained, the Oil Reservoir Types feature includes at least well type and well section length；According to the Oil Reservoir Types feature and preset characteristics of reservoirs and steam injection mode corresponding relationship, the target well is determined Steam injection mode.
- The steam injection parameter optimization method 5. complex fault block heavy crude reservoir according to claim 4 is handled up, which is characterized in that described According to the Oil Reservoir Types feature and preset characteristics of reservoirs and steam injection mode corresponding relationship, the steam injection of the target well is determined Mode, comprising:If the target well is channeling well, steam injection mode is selected as combined steam injection mode；If the target well is straight well, and of length no more than default first length of its perforated interval, then its steam injection mode selects Steam injection mode is infused to be single；If the target well is straight well, and its perforated interval length is more than default first length, then its steam injection mode is selected It is selected as layer steam injection mode；If the target well is horizontal well, and its horizontal section length is no more than default second length, then its steam injection mode is selected It is selected as single note steam injection mode；OrIf the target well is horizontal well, and its net horizontal section is more than default second length, then its steam injection mode selects For multiple spot steam injection mode.
- The steam injection parameter optimization method 6. complex fault block heavy crude reservoir according to claim 1 is handled up, which is characterized in that also wrap It includes:Obtain the viscosity of crude of the target well；Judge whether the viscosity of crude is more than preset viscosity number；If it exceeds, it is determined that steam injection medium includes hot steam and auxiliary viscosity reduction gas.
- The steam injection parameter optimization method 7. complex fault block heavy crude reservoir according to claim 6 is handled up, which is characterized in that described Auxiliary viscosity reduction gas include carbon dioxide.
- The steam injection parameter optimization method 8. complex fault block heavy crude reservoir according to claim 6 is handled up, which is characterized in that work as institute State steam injection medium include hot steam and auxiliary viscosity reduction gas when, it is described auxiliary viscosity reduction gas injection rate be the hot steam inject The 0.05~0.1 of amount.
- The steam injection parameter optimization method 9. complex fault block heavy crude reservoir according to claim 1 is handled up, which is characterized in that also wrap It includes:In injection, Wellhead steam injection mass dryness fraction is detected；If the Wellhead steam injection mass dryness fraction deviates default steam quality value, adjust the injection temperature of hot steam, injection pressure and/ Or steam injection intensity, so that the Wellhead steam injection mass dryness fraction maintains the default steam quality value.
- The steam injection parameter optimization method 10. complex fault block heavy crude reservoir according to claim 1 is handled up, which is characterized in that also Include:Count steam injection amount and an oil increment handled up in the steam injection period；According to preset steam injection amount and oil increment relation curve, judge under the steam injection amount, whether the oil increment reaches Preset requirement, the preset requirement include period gas oil ratio and period abandonment rate；If reached, the injection in next steam injection period of handling up is carried out.
- The steam injection parameter optimization method 11. complex fault block heavy crude reservoir according to claim 10 is handled up, which is characterized in that also Include:If the oil increment is not up to preset requirement under the steam injection amount；Then cancel next handle up the steam injection period.
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| CN106919756A (en) * | 2017-03-01 | 2017-07-04 | 中国海洋石油总公司 | A kind of steam soak injection parameter optimization method based on approximate model |
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| CN110344796B (en) * | 2018-04-04 | 2021-08-06 | 中国石油化工股份有限公司 | Steam injection parameter prediction method based on three-parameter principle |
| CN110552678A (en) * | 2019-08-05 | 2019-12-10 | 邓惠荣 | method for producing hydrogen by reverse well arrangement, one injection and multiple production supercritical combustion gasification of deep and super-thick layer coal |
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| CN115405273B (en) * | 2021-05-27 | 2023-07-25 | 中国石油天然气股份有限公司 | Thickened oil multi-medium throughput intelligent mining method and device based on ensemble learning |
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