CN107654222A - Fossil energy recovery method and system - Google Patents
Fossil energy recovery method and system Download PDFInfo
- Publication number
- CN107654222A CN107654222A CN201710751852.8A CN201710751852A CN107654222A CN 107654222 A CN107654222 A CN 107654222A CN 201710751852 A CN201710751852 A CN 201710751852A CN 107654222 A CN107654222 A CN 107654222A
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- well
- oil reservoir
- air guide
- coal gasification
- target oil
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Classifications
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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
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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
- E21B43/295—Gasification of minerals, e.g. for producing mixtures of combustible gases
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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
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
-
- 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
- E21B43/305—Specific pattern of wells, e.g. optimizing the spacing of wells comprising at least one inclined or horizontal well
Abstract
The invention provides a kind of fossil energy recovery method and system.This method comprises the following steps：Shaft building step, by the object-oriented oil reservoir drilling oil well in ground, and interface channel is established between the first end of the coal gasification passage pre-established in the coal seam above target oil reservoir and target oil reservoir；There is pre-determined distance between interface channel and producing well；Gasification step, by conveying gasifying agent into coal gasification passage from the inlet well that ground pre-establishes into coal seam, coal carries out coal gasification reaction with gasifying agent, produces the reacting gas with preset temperature, and reacting gas is delivered to target oil reservoir through interface channel；Displacement of reservoir oil step, reacting gas are reacted with the crude oil in target oil reservoir, and drive crude oil to movement at producing well；Oil recovery step, the crude oil around producing well is gathered, and be delivered to ground.In the present invention, caused reacting gas can be fed directly to carry out the displacement of reservoir oil in target oil reservoir in coal gasification passage, be effectively improved oil displacement efficiency, it is ensured that the recovery ratio of crude oil.
Description
Technical field
The present invention relates to fossil energy technical field, in particular to a kind of fossil energy recovery method and system.
Background technology
At present, fossil energy mainly has coal, oil, oil-sand, oil shale etc..As superficial part (1000 meters with shallow) coal provides
Source and middle and high infiltration permeability oil reservoir resource gradually use up, and the exploitation of deep (1000 meters with depth) coal resources and viscous crude resource is increasingly
Paid attention to by countries in the world.In general, in many areas in deep, as Xinjiang of China In The Eastern Junggar Basin Jimusar is recessed
Area, Liaohe Oil Field little Long Wan oil area are fallen into, coal seam, oil reservoir and gas-bearing formation exist simultaneously, and coal seam is on top, and oil reservoir and gas-bearing formation are in bottom.
At present, the method for thickened oil recovery includes：CO2The displacement of reservoir oil and steam flooding.Wherein, CO2Technology of reservoir sweep is such as：Patent
CN103470223 discloses a kind of low-carbon co-mining method and system for fossil energy, wherein, method is：Coal seam and oil reservoir and/
Or the region that gas-bearing formation coexists, produce mixed gas after coal combustion is gasified using coal underground gasification technology, coal gas collect to
Purified behind ground, and by the CH in coal gas4、CO2Gas is separated, the CO separated2Gas be pressed into oil reservoir and/or
In gas-bearing formation, CO that the crude oil in oil reservoir is pressed into2Gas is discharged, the CO that the gas-bearing formation air mixture in gas-bearing formation is pressed into2Gas is arranged
Go out, the crude oil of discharge and the gas-bearing formation air mixture of discharge are gathered respectively, so as to realize adopting altogether for fossil energy.Disclosed in the patent
Method is applied to the exploitation of viscous crude resource, but oil reservoir requires CO2With preferable miscible conditions, this causes CO2It is difficult to meet oil
The requirement of layer, greatly reduce the effect of the displacement of reservoir oil.
Steam flooding is domestic most important the Technology of Heavy Oil Recovery, and steam flooding technology is needed high temperature, high steam injection
In oil reservoir, to reduce Crude viscosity, crude oil fluidity is improved.Although this method disclosure satisfy that the requirement of oil reservoir, still, high temperature steams
The generation of vapour needs to consume substantial amounts of water resource and fuel (such as natural gas), also, caused high-temperature steam is in course of conveying
It is middle larger heat loss to be present, greatly reduce the effect of the displacement of reservoir oil.
The content of the invention
In consideration of it, the present invention proposes a kind of fossil energy recovery method, it is intended to solves flooding method of the prior art
The problem of being easily reduced oil displacement efficiency.The invention also provides a kind of fossil energy mining system.
On one side, the present invention proposes a kind of fossil energy recovery method, and this method comprises the following steps：Shaft building walks
Suddenly, by the object-oriented oil reservoir drilling oil well in ground, and the of the coal gasification passage pre-established in the coal seam above target oil reservoir
Interface channel is established between one end and target oil reservoir；Wherein, there is pre-determined distance between interface channel and producing well；Gasification step
Suddenly, by conveying gasifying agent into coal gasification passage from the inlet well that ground pre-establishes into coal seam, coal is carried out with gasifying agent
Coal gasification reaction, produces the reacting gas with preset temperature, and reacting gas is delivered to target oil reservoir through interface channel；Wherein,
Inlet well is connected with the second end of coal gasification passage；Displacement of reservoir oil step, reacting gas are reacted with the crude oil in target oil reservoir,
And crude oil is driven to movement at producing well；Oil recovery step, the crude oil around producing well is gathered, and be delivered to ground.
Further, in above-mentioned fossil energy recovery method, in shaft building step, air guide well is bored by the object-oriented oil reservoir in ground,
The side wall of air guide well offers opening, and opening is connected by connecting pipe with the first end of coal gasification passage；Air guide well is from opening
Mouth to the part being placed in target oil reservoir and connecting pipe forms interface channel.
Further, in above-mentioned fossil energy recovery method, in shaft building step, connecting tube is provided with interface channel, even
Take over the part being placed in target oil reservoir and offer multiple perforates.
Further, in above-mentioned fossil energy recovery method, air guide well is peupendicular hole or horizontal directional drilling.
Further, in above-mentioned fossil energy recovery method, in shaft building step, producing well is peupendicular hole or horizontal directional drill
Well.
Further, in above-mentioned fossil energy recovery method, in shaft building step, when air guide well and producing well are peupendicular hole
When, air guide well has pre-determined distance in the horizontal direction with producing well；When air guide well and producing well are horizontal orientation well, lead
The horizontal segment of gas well and the horizontal segment of producing well have pre-determined distance in vertical direction.
Further, in above-mentioned fossil energy recovery method, in gasification step, the gasifying agent of inlet well conveying is by coal gasification
The first end of passage progressively conveys to the second end.
Further, in above-mentioned fossil energy recovery method, in gasification step, by adjusting the work that gasifies in coal gasification reaction
Skill parameter is so that reacting gas has preset temperature.
Further, in above-mentioned fossil energy recovery method, in oil recovery step, flow string is provided with producing well, is recovered the oil
The part that pipe is placed in target oil reservoir offers multiple perforates.
In the present invention, by the way that coal gasification passage is connected with target oil reservoir, then coal gasification reaction produces in coal gasification passage
The reacting gas of raw preset temperature can be fed directly in target oil reservoir, and the reacting gas acts not only as the heat of the displacement of reservoir oil
Source, oil reservoir is heated, reduce Crude viscosity, improve the mobility of crude oil, realize the effect of the hot displacement of reservoir oil, also, react
CO in gas2Mixed with crude oil, playing a part of the water vapour in the displacement of reservoir oil, and reacting gas can further reduce
Crude viscosity, the effect of the displacement of reservoir oil is also played, realize the effect of steam flooding, produce water vapour without other equipment, significantly
Save water vapour and produce consumed resource, additionally it is possible to the temperature of water vapour is effectively ensured, reduces the heat loss of water vapour,
The effect of the displacement of reservoir oil is effectively improved, solves the problems, such as that flooding method of the prior art is easily reduced oil displacement efficiency, it is ensured that
The recovery ratio of crude oil, and equipment investment is few, it is cost-effective.
On the other hand, the invention also provides a kind of fossil energy mining system, the system include：Inlet well, coal gasification
Passage, interface channel and producing well；Wherein, inlet well is worn into the coal seam above target oil reservoir by ground, inlet well and coal
Second end of gasification tunnel is connected, and the first end of coal gasification passage is connected by interface channel with target oil reservoir, coal gasification
Passage is used to carry out reacting gas of the coal gasification reaction generation with preset temperature, and reacting gas is delivered into target oil reservoir
In, reacting gas is used to drive the crude oil in target oil reservoir to move；Producing well is worn into target oil reservoir by ground, and producing well is used
In collection crude oil, and by the Crude Oil Transportation collected to ground；Interface channel has pre-determined distance with producing well.
Further, in above-mentioned fossil energy mining system, connecting tube is provided with interface channel, connecting tube is placed in target
Part in oil reservoir offers multiple perforates；And/or flow string is provided with producing well, flow string is placed in target oil reservoir
Part offers multiple perforates.
Further, above-mentioned fossil energy mining system also includes：Air guide well and connecting pipe；Wherein, air guide well is by ground
Face wears to target oil reservoir, the side wall of air guide well and offers opening, the first end that opening passes through connecting pipe and coal gasification passage
It is connected, air guide well forms interface channel by opening to the part being placed in target oil reservoir with connecting pipe；Air guide well is placed in mesh
Part in mark oil reservoir has pre-determined distance with producing well.
Further, in above-mentioned fossil energy mining system, airway tube is provided with air guide well, airway tube is placed in target oil
Part in layer offers multiple perforates.
Further, in above-mentioned fossil energy mining system, gasifying agent conveying equipment is provided with inlet well, gasifying agent is defeated
Equipment is sent to be movably positioned in from the first end of coal gasification passage to the second end in coal gasification passage.
Further, in above-mentioned fossil energy mining system, inlet well is horizontal orientation well；Air guide well is peupendicular hole or water
Flat directed drilling；Producing well is peupendicular hole or horizontal directional drilling.
In the present invention, by the way that coal gasification passage is connected with target oil reservoir, then it is anti-that coal gasification is carried out in coal gasification passage
The reacting gas of preset temperature can be fed directly in target oil reservoir caused by answering, and the reacting gas acts not only as the displacement of reservoir oil
Thermal source, oil reservoir is heated, reduce Crude viscosity, improve the mobility of crude oil, realize the effect of the hot displacement of reservoir oil, also,
CO in reacting gas2Mixed with crude oil, the water vapour played a part of in the displacement of reservoir oil, and reacting gas can be further
Crude viscosity is reduced, the effect of the displacement of reservoir oil is also played, realizes the effect of steam flooding, water vapour is produced without other equipment,
Greatly save water vapour and produce consumed resource, additionally it is possible to the temperature of water vapour is effectively ensured, reduces the heat of water vapour
Loss, it is effectively improved the effect of the displacement of reservoir oil, it is ensured that the recovery ratio of crude oil, and equipment investment is few, and it is cost-effective.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, it is various other the advantages of and benefit it is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And in whole accompanying drawing, identical part is denoted by the same reference numerals.In the accompanying drawings：
Fig. 1 is the flow chart of fossil energy recovery method provided in an embodiment of the present invention；
Fig. 2 is the structural representation of fossil energy mining system provided in an embodiment of the present invention；
Fig. 3 is the another structural representation of fossil energy mining system provided in an embodiment of the present invention.
Embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although the disclosure is shown in accompanying drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
Limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Completely it is communicated to those skilled in the art.It should be noted that in the case where not conflicting, embodiment in the present invention and
Feature in embodiment can be mutually combined.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Embodiment of the method：
Referring to Fig. 1, Fig. 1 is the flow chart of fossil energy recovery method provided in an embodiment of the present invention.As illustrated, fossil
Energy extraction method comprises the following steps：
Shaft building step S1, by the object-oriented oil reservoir drilling oil well in ground, and pre-established in the coal seam above target oil reservoir
Coal gasification passage first end and target oil reservoir between establish interface channel；Wherein, have between interface channel and producing well
Pre-determined distance.
Specifically, the oil reservoir of viscous crude to be collected is selected first, and the oil reservoir is defined as target oil reservoir 6, the target oil reservoir 6
Coal seam 7 is provided with the pre-determined distance of top.From ground 5 to the drilling oil well 1 of target oil reservoir 6, first end (Fig. 2 of the producing well 1
Shown upper end) it is connected with ground 5, the producing well 1 wears rock stratum and coal seam 7 successively, and the second end of producing well 1 is (shown in Fig. 2
Lower end) be placed in target oil reservoir 6 and be connected with target oil reservoir 6, and, the second end of producing well 1 is placed in target oil reservoir 6
At first predetermined depth.First predetermined depth is the distance between top of the second end and the target oil reservoir 6 of producing well 1, should
First predetermined depth can determine that the present embodiment does not do any restrictions to this according to actual conditions.
Coal gasification passage 2, first end (Fig. 2 institutes of coal gasification passage 2 can be pre-established in coal seam 7 on target oil reservoir 6
The left end shown) interface channel 3 is set up into target oil reservoir 6, so as to be connected between coal gasification passage 2 and target oil reservoir 6, the coal
Gasification tunnel 2 is used to carry out coal gasification reaction.The interface channel 3 is partially disposed in target oil reservoir 6, also, interface channel 3 is placed in
Part in target oil reservoir 6 is connected with target oil reservoir 6, and interface channel 3 has the second predetermined depth in target oil reservoir 6, should
Second predetermined depth can determine that the present embodiment is not intended to be limited in any to this according to actual conditions.
Connecting tube can be provided with interface channel 3, the part that connecting tube is placed in target oil reservoir 6 offers multiple open
Hole, so that interface channel 3 preferably connects with target oil reservoir 6.Specifically, the part that the connecting tube is placed in target oil reservoir 6 can
Think screen casing, at this moment, the part that interface channel 3 is placed in target oil reservoir is bore hole, and target oil reservoir 6 is disclosed to form duct.Sieve
Pipe can be cutting seam sieve tube or wire-wrapped screen, preferably cutting seam sieve tube.The material of screen casing can be fiberglass.Can also,
The part that connecting tube is placed in target oil reservoir 6 is opened up by multiple perforates by perforating system, at this moment, interface channel 3 is placed in target
Part in oil reservoir carries out sealing, typically using cement sealing.
There is the first pre-determined distance between producing well 1 and coal gasification passage 2, with ensure coal gasification reaction and producing well 1 it
Between do not interfere with each other.There is the second pre-determined distance between interface channel 3 and producing well 1.When it is implemented, the first pre-determined distance and
Two pre-determined distances can determine that the present embodiment is not intended to be limited in any to this according to actual conditions.
When it is implemented, the length of coal gasification passage 2 can according to the well spacing density of target oil reservoir 6, the well services time limit,
Heat injection amount etc. determines that general length is 200m~1500m, in the present embodiment, length 500m.
Gasification step S2, gasifying agent is conveyed into coal gasification passage by the inlet well that ground pre-establishes into coal seam,
Coal carries out coal gasification reaction with gasifying agent, produces the reacting gas with preset temperature, and the reacting gas conveys through interface channel
To target oil reservoir；Wherein, inlet well is connected with the second end of coal gasification passage.
Specifically, inlet well 4 can also be pre-established, the inlet well 4 is drilled with from ground 5 to the coal seam 7, the inlet well 4
First end (upper end shown in Fig. 2) be connected with ground 5, the second end (lower end shown in Fig. 2) of the inlet well 4 and coal gasification
The second end (right-hand member shown in Fig. 2) of passage 2 is connected.Gasifying agent conveying equipment, gasifying agent conveying are provided with the inlet well 4
Equipment is used to convey gasifying agent into coal gasification passage 2, and gasifying agent includes：Oxygen, water vapour, water, carbon dioxide, air etc..
Gasifying agent carries out coal gasification reaction in coal gasification passage 2 with coal, and specific reaction is：With coal combustion reaction C+O occurs for oxygen2→
CO2, gasification reaction C+H2O→CO+H2、C+CO2→2CO、C+2H2→CH4, then, and the master of the reacting gas of coal gasification reaction generation
It is CO to want composition2And water vapour, and small part fuel gas such as CH4、CO、H2Deng high-temperature gas, wherein, water vapour source
The absorption water contained in coal seam 7 and stratum.Reacting gas has preset temperature, and the preset temperature should be able to meet wanting for the displacement of reservoir oil
Ask.Because the first end of coal gasification passage 2 is connected by interface channel 3 with target coal seam 7, so, produced in coal gasification passage 2
Raw reacting gas is delivered in target oil reservoir 6 by interface channel 3.
The temperature of reacting gas can be by adjusting gasification process parameter in coal gasification reaction so that reacting gas has in advance
, specifically, can be by adjusting the flow of gasifying agent, the pressure of gasifying agent, oxygen concentration, water-carrying capacity, gasifying agent if temperature
Input position etc., the composition and temperature of reacting gas are adjusted, to ensure that the temperature of reacting gas meets the requirement of the displacement of reservoir oil, ensure to drive
Oil is smoothed out.In the present embodiment, the temperature of reacting gas is typically in the range of 300 DEG C~900 DEG C.
When it is implemented, there is the 3rd pre-determined distance, to avoid producing well 1 and inlet well between inlet well 4 and producing well 1
Disturbed between 4.3rd pre-determined distance can determine that the present embodiment is not intended to be limited in any to this according to actual conditions.
Displacement of reservoir oil step S3, reacting gas are reacted with the crude oil in target oil reservoir, and drive crude oil to shifting at producing well
It is dynamic.
Specifically, the crude oil in reacting gas and target oil reservoir 6 reacted, conducted heat, mass transfer and infiltration, due to reaction gas
Body has preset temperature, and the viscosity of crude oil declines in the presence of the temperature, improves the mobility of crude oil, also, the temperature
In oil reservoir transmittance process so that oil reservoir generates thermograde, forms different heating tapes, is advantageous to the flowing of crude oil.
CO in reacting gas2Mixed with crude oil, the CO2The displacement of reservoir oil can be played a part of；And the water vapour in reacting gas can
Crude viscosity is reduced, improves crude oil fluidity.Under the driving of motive power, crude oil is driven by the reacting gas of high temperature, by
Pressure at producing well 1 is smaller, so, crude oil is to flowing at producing well 1, so as to the shape between interface channel 3 and producing well 1
Into crude oil flow passage, crude oil is delivered at producing well 1 via crude oil flow passage.
Oil recovery step S4, the crude oil around producing well is gathered, and be delivered to ground.
Specifically, oil production equipment is provided with producing well 1, the oil production equipment is by the crude oil near the second end of producing well 1
Collect and be delivered to ground 5.When it is implemented, crude oil can be gathered by modes such as lifting, sucker rod pumpings.Reacting gas
Ground 5 can be delivered to by producing well 1, carries out subsequent treatment and application.
Flow string can be provided with producing well 1, the part that flow string is placed in target oil reservoir 6 offers multiple perforates,
So that producing well 1 preferably connects with target oil reservoir 6, it is easy to crude oil and reacting gas being collected, improves oil recovery efficiency,
Avoiding the open-ended at the second end of only producing well 1 causes to block.Specifically, when the portion that producing well 1 is placed in target oil reservoir 6
When being divided into bore hole, the part that flow string is placed in target oil reservoir 6 can be screen casing, to form duct and target oil reservoir 6 preferably
Connection, is easy to receive more crude oil and reacting gas.Screen casing can be cutting seam sieve tube or wire-wrapped screen, preferably slot
Screen casing.The material of screen casing can be fiberglass.Sealing is carried out when producing well 1 is placed in part in target oil reservoir 6, typically using water
When mudding is solid, the part that flow string is placed in target oil reservoir 6 can be opened up by multiple perforates by perforating system.
When it is implemented, inlet well 4 and producing well 1 can be multiple, spacing between two neighboring inlet well 4 or
Spacing between two neighboring producing well 1 can determine according to the mining type of target oil reservoir, such as conventional five-point type, seven
Point is, nine point types, inverted five spot, the well pattern schemes such as anti-7 points, the present embodiment do not do any restrictions to this.It is also possible that will be multiple
Inlet well 4 is arranged to the arrangement of at least one peupendicular hole and a horizontal orientation well, and peupendicular hole is arranged in horizontal orientation well
The both sides of horizontal segment.Accordingly, producing well 1 is it can also be provided that the arrangement side of at least one peupendicular hole and a horizontal orientation well
Formula, peupendicular hole are arranged in the both sides of horizontal orientation well horizontal segment.That is, it can be set in the both sides of inlet well 4 and end
Peupendicular hole, the peupendicular hole are used to aid in injection gasifying agent.Peupendicular hole can be set in the both sides of producing well 1 and end, this is vertical
Well is used for assisted acquisition crude oil.
As can be seen that in the present embodiment, by the way that coal gasification passage 2 is connected with target oil reservoir 6, then coal gasification passage 2
The reacting gas of preset temperature can be fed directly in target oil reservoir 6 caused by interior coal gasification reaction, and the reacting gas is not only
Oil reservoir can be heated as the thermal source of the displacement of reservoir oil, reduce Crude viscosity, improve the mobility of crude oil, realize the hot displacement of reservoir oil
Effect, also, the CO in reacting gas2Mixed with crude oil, the water played a part of in the displacement of reservoir oil, and reacting gas steams
Vapour can further reduce Crude viscosity, also play the effect of the displacement of reservoir oil, the effect of steam flooding be realized, without other equipment
Water vapour is produced, water vapour is greatlyd save and produces consumed resource, additionally it is possible to the temperature of water vapour is effectively ensured, reduces
The heat loss of water vapour, the effect of the displacement of reservoir oil is effectively improved, solves flooding method of the prior art and be easily reduced the displacement of reservoir oil
The problem of effect, it is ensured that the recovery ratio of crude oil, and equipment investment is few, and it is cost-effective.
Referring to Fig. 2, in above-described embodiment, in shaft building step S1, air guide well, the side of air guide well are bored by the object-oriented oil reservoir in ground
Wall offers opening, and opening is connected by connecting pipe with the first end of coal gasification passage.
Specifically, the first end (upper end shown in Fig. 2) of air guide well 8 is connected with ground 5, and air guide well 8 wears rock successively
Layer and coal seam 7, the second end (lower end shown in Fig. 2) of air guide well 8 are placed in target oil reservoir 6 and are connected with target oil reservoir 6, with
And the second end of air guide well 8 is placed at the 3rd predetermined depth of target oil reservoir 6.3rd predetermined depth is the second of air guide well 8
The distance between end and the top of target oil reservoir 6, the 3rd predetermined depth can determine according to actual conditions, the present embodiment pair
This does not do any restrictions.Air guide well 8 is placed in rock stratum or the part in coal seam 7 and offers opening, first end (Fig. 2 of connecting pipe 9
Shown left end) and opening in communication, the second end (right-hand member shown in Fig. 2) of connecting pipe 9 and the first end of coal gasification passage 2
It is connected.
Air guide well forms interface channel from opening to the part being placed in target oil reservoir with connecting pipe.
Specifically, air guide well 8 forms interface channel 3 from opening to the part at the second end and connecting pipe 9.Air guide well 8 is put
Part in target oil reservoir 6 has pre-determined distance with producing well 1.Traffic organising switch can be provided with interface channel 3,
The traffic organising is switched for controlling coal gasification passage 2 and the first end of air guide well 8 to be connected, or control coal gasification passage 2
It is connected with target oil reservoir 6, that is to say, that it is by air guide to produce reacting gas in traffic organising switch control coal gasification passage 2
The first end output of well 8 is still delivered in target oil reservoir 6 by the second end of air guide well 8.Caused reaction in coal gasification passage 2
Gas passes sequentially through connecting pipe 9 and opening is delivered in air guide well 8, when traffic organising switchs control coal gasification passage 2 and mesh
When mark oil reservoir 6 is connected, reacting gas flowing (for Fig. 2) downwards in air guide well 8, by the second end of air guide well 8
Output is into target oil reservoir 6.
During specific works, the gasifying agent conveying equipment in inlet well 4 conveys gasifying agent into coal gasification passage 2, passes through stream
It is connected to controlling switch control coal gasification passage 2 with the first end of air guide well 8, then the point at the first end of coal gasification passage 2
Coal gasification reaction occurs for fire, coal seam 7 of igniting, gasifying agent and coal, produces the reacting gas with preset temperature, and reacting gas can be with
It is delivered in air guide well 8 by connecting pipe 9 by the first end of coal gasification passage 2, and is exported by the first end of air guide well 8 to ground
Face.The concentration and flow of the gasifying agent inputted by adjusting gasifying agent conveying equipment, the combustion zone of coal gasification is cultivated, until burning
Tend towards stability.At this moment, traffic organising switch control coal gasification passage 2 is connected with target oil reservoir 6, adjusts gasifying agent conveying equipment
The concentration of the gasifying agent of input and flow etc., to improve the gas injection pressure of inlet well 4, then corresponding air guide Jing8Chu pressure compared with
Small, then reacting gas is delivered in air guide well 8 by the first end of coal gasification passage 2 by connecting pipe 9.Due to air guide well 8
First end is closed, so, reacting gas is delivered in target oil reservoir 6 by the second end of air guide well 8.
When it is implemented, when being lighted a fire at the first end of coal gasification passage 2, electric ignition or chemic ignition etc. can be used
Mode is ignited coal seam 7.
When it is implemented, can be provided with airway tube in air guide well 8, the part that airway tube is placed in target oil reservoir 6 opens up
There are multiple perforates, specifically, when the part that air guide well 8 is placed in target oil reservoir 6 is bore hole, airway tube is placed in target oil reservoir 6
In part can be screen casing, screen casing can be cutting seam sieve tube or wire-wrapped screen, preferably cutting seam sieve tube.The material of screen casing
Can be fiberglass.When air guide well 8 is placed in the progress sealing of the part in target oil reservoir 6, when typically using cement sealing, Ke Yitong
Cross perforating system and the part that airway tube is placed in target oil reservoir 6 is opened up into multiple perforates.
As can be seen that in the present embodiment, the opening that air guide well 8 opens up is connected by connecting pipe 9 with coal gasification passage 2
It is logical so that the reacting gas in coal gasification passage 2 can be delivered in target oil reservoir 6, also, reduces equipment, substantially reduced
Investment.
Referring to Fig. 2 and Fig. 3, in above-described embodiment, inlet well 4 can be horizontal orientation well, and the horizontal segment of inlet well is located at
In coal seam 7.
Air guide well is peupendicular hole or horizontal directional drilling, then the type that air guide well 8 is set can according to actual conditions come
It is determined that the present embodiment does not do any restrictions to this.
Producing well is peupendicular hole or horizontal directional drilling, then the type that producing well 1 is set can according to actual conditions come
It is determined that the present embodiment does not do any restrictions to this.
In above-described embodiment, in shaft building step S1,
When air guide well and producing well are peupendicular hole, air guide well has pre-determined distance in the horizontal direction with producing well.
Referring to Fig. 2, specifically, producing well 1 can be placed in the left side (for Fig. 2) of air guide well 8, can also be placed in
The right side of air guide well 8.The part that the part that air guide well 8 is placed in target oil reservoir 6 is placed in target oil reservoir 6 with producing well 1 is in water
Square to having pre-determined distance on (direction from left to right shown in Fig. 2), the pre-determined distance is used for the second end for making air guide well 8
Crude oil flow passage is formed between the second end of producing well 1, it is ensured that in Crude Oil Transportation to producing well 1.When it is implemented, this is pre-
If distance can determine that the present embodiment is not intended to be limited in any to this according to actual conditions.
Referring to Fig. 2, in the present embodiment, producing well 1 is placed in the right side of inlet well 4, also, producing well 1 and inlet well 4 it
Between distance be 70m.
When air guide well and producing well are horizontal orientation well, the horizontal segment of air guide well is with the horizontal segment of producing well vertical
There is pre-determined distance on direction.
Referring to Fig. 3, specifically, producing well 1 can be placed in the left side (for Fig. 3) of air guide well 8, can also be placed in
The right side of air guide well 8.The horizontal segment of air guide well 8 is placed in target oil reservoir 6, then the airway tube in the horizontal segment of air guide well 8 opens up
There are multiple perforates.The horizontal segment of producing well 1 is placed in target oil reservoir 6, then the flow string in the horizontal segment of producing well 1 offers more
Individual perforate.Crude oil flow passage is formed between the horizontal segment of air guide well 8 and the horizontal segment of producing well 1.The level of air guide well 8
Section has pre-determined distance with the horizontal segment of producing well 1 in vertical direction (direction from top to bottom shown in Fig. 3), this preset away from
From for forming crude oil flow passage, it is ensured that in Crude Oil Transportation to producing well 1.When it is implemented, the pre-determined distance can basis
Actual conditions determine that the present embodiment is not intended to be limited in any to this.Between the vertical section of air guide well 8 and the vertical section of producing well 1
Distance can determine that the present embodiment does not do any restrictions to this according to actual conditions.
Referring to Fig. 3, in the present embodiment, the distance between air guide well 8 and inlet well 4 are 1000m.Producing well 1, which is placed in, leads
The left side of gas well 8, producing well 1 be arranged in parallel with air guide well about 8, and the horizontal segment of air guide well 8 is placed in the upper of the horizontal segment of producing well 1
Side.Vertical range between the horizontal segment and the horizontal segment of producing well 1 of air guide well 8, can according to target oil reservoir and recovery features come
It is determined that generally 2~20m.In the present embodiment, the vertical range between the horizontal segment of air guide well 8 and the horizontal segment of producing well 1 is
5m.The length of the horizontal segment of air guide well 8 can determine with the length of the horizontal segment of producing well 1 according to oil reservoir and recovery features, relate to
And principle is to control target oil reservoir Crude Oil oil in place, generally 300~900m to greatest extent.In the present embodiment, lead
The length of the horizontal segment of gas well 8 and the length of the horizontal segment of producing well 1 are 400m.
During specific works, when air guide well 8 and producing well 1 are horizontal orientation well, crude oil by air guide well 8 horizontal segment
Driven by reacting gas, because the pressure at producing well 1 is smaller, so, crude oil is in the presence of gravity and other each active forces
Flow to the horizontal segment of producing well 1, be delivered to via crude oil flow passage at producing well 1.
As can be seen that in the present embodiment, by limiting the distance between air guide well 8 and producing well 1, so as to define air guide
Well 8 and position of the producing well 1 in target oil reservoir 6, it is ensured that the flowing of crude oil.
In above-described embodiment, in gasification step S2, the gasifying agent of inlet well conveying is from the first end of coal gasification passage to the
Two ends progressively convey.
Specifically, it is front end by the first end of coal gasification passage 2, is rear end by the second end of coal gasification passage 2, by
The mode that the first end of coal gasification passage 2 is moved then to retreat to the second end moves, and the gasifying agent conveying equipment in inlet well 4 will
Gasifying agent is conveyed by the way of progressively retreating.
As can be seen that in the present embodiment, by the way that using being conveyed by way of progressively retreating, gasifying agent is enabled into gas
Agent carries out sufficient gasification reaction with coal, additionally it is possible to so that caused reacting gas more successfully conveys through interface channel 3
Into target oil reservoir 6, it is easy to the displacement of reservoir oil.
In summary, in the present embodiment, by the way that coal gasification passage 2 is connected with target oil reservoir 6, in coal gasification passage 2
The reacting gas of preset temperature caused by coal gasification reaction can be fed directly in target oil reservoir 6, and the reacting gas not only may be used
Using the thermal source as the displacement of reservoir oil, oil reservoir is heated, Crude viscosity is reduced, improves the mobility of crude oil, realize the hot displacement of reservoir oil
Effect, also, the CO in reacting gas2Mixed with crude oil, play a part of the water vapour in the displacement of reservoir oil, and reacting gas
Crude viscosity can be further reduced, also plays the effect of the displacement of reservoir oil, realizes the effect of steam flooding, is produced without other equipment
Producing water vapor, greatly save water vapour and produce consumed resource, additionally it is possible to the temperature of water vapour is effectively ensured, reduces water
The heat loss of steam, it is effectively improved the effect of the displacement of reservoir oil, it is ensured that the recovery ratio of crude oil, and equipment investment is few, saves into
This.
System embodiment：
The present embodiment also proposed a kind of fossil energy mining system, and referring to Fig. 2 and Fig. 3, fossil energy is shown in figure
The preferred structure of mining system.As illustrated, fossil energy mining system can include：Inlet well 4, coal gasification passage 2, connection
Passage 3 and producing well 1.Wherein, inlet well 4 is worn into the coal seam 7 of the top of target oil reservoir 6 by ground 5, inlet well 4 and coal gas
The second end for changing passage 2 is connected, and the first end of coal gasification passage 2 is connected by interface channel 3 with target oil reservoir 6.It is described
Coal gasification passage 2 is used to carry out reacting gas of the coal gasification reaction generation with preset temperature, and reacting gas is delivered into mesh
Mark in oil reservoir 6, reacting gas is used to drive the crude oil in target oil reservoir 6 to move.
Specifically, coal gasification passage 2 is established in the coal seam 7 above target oil reservoir 6, the coal gasification passage 2 is set in level
Put.Inlet well 4 is set into coal seam 7 from ground 5, the inlet well 4 and the second end (right-hand member shown in Fig. 2) of coal gasification passage 2
It is connected, the inlet well 4 is used to convey gasifying agent into coal gasification passage 2.Gasifying agent conveying can be provided with inlet well 4 to set
Standby, gasifying agent conveying equipment is used to convey gasifying agent into coal gasification passage 2, and gasifying agent includes：Oxygen, water vapour, water, dioxy
Change carbon, air etc..
The first end (left end shown in Fig. 2) of coal gasification passage 2 sets up interface channel 3 into target oil reservoir 6, so that coal gas
Change passage 2 with target oil reservoir 6 to be connected.The first end of interface channel 3 is connected with the first end of coal gasification passage 2, and connection is logical
Second end in road 3 is placed in target oil reservoir 6, and the second end of interface channel 3 has predetermined depth in target oil reservoir 6.Specific implementation
When, the predetermined depth can determine that the present embodiment is not intended to be limited in any to this according to actual conditions.
When it is implemented, the preset temperature of reacting gas can determine that the present embodiment is not done to this according to actual conditions
Any restrictions.
Producing well 1 is worn into target oil reservoir 6 by ground 5, and producing well 1 is used to gather the crude oil around producing well 1, and will
The Crude Oil Transportation collected is to ground 5.Specifically, the first end (upper end shown in Fig. 2) of producing well 1 is connected with ground 5, adopts
Oil well 1 wears rock stratum and coal seam 7 successively, and the second end (lower end shown in Fig. 2) of producing well 1 is placed in target oil reservoir 6 and and mesh
Mark oil reservoir 6 is connected, and, the second end of producing well 1 is placed at the predetermined depth of target oil reservoir 6.The predetermined depth is oil recovery
The distance between second end of well 1 and the top of target oil reservoir 6, the predetermined depth can determine according to actual conditions, this reality
Apply example and any restrictions are not done to this.When it is implemented, be provided with oil production equipment in producing well 1, oil production equipment is by the of producing well 1
Crude oil near two ends is collected and is delivered to ground 5.
There is the first pre-determined distance between producing well 1 and coal gasification passage 2, with ensure coal gasification reaction and producing well 1 it
Between do not interfere with each other.Interface channel 3 and producing well 1 have the second pre-determined distance, when it is implemented, the first pre-determined distance and second pre-
If apart from can be determined according to actual conditions, the present embodiment is not intended to be limited in any to this.
During work, gasifying agent conveys gasifying agent via the gasifying agent conveying equipment in inlet well 4 into coal gasification passage 2,
With coal coal gasification reaction occurs in coal gasification passage 2 for gasifying agent, produces the reacting gas with preset temperature.Specific reaction
For：With coal combustion reaction C+O occurs for oxygen2→CO2, gasification reaction C+H2O→CO+H2、C+CO2→2CO、C+2H2→CH4, then
The main component of reacting gas is CO2And water vapour, and small part fuel gas such as CH4、CO、H2Deng high-temperature gas, its
In, water vapour derives from coal seam 7 and the absorption water contained in stratum.Reacting gas is by the first end of coal gasification passage 2 by connecting
Road 3 is connected to be delivered in target oil reservoir 6.Crude oil in reacting gas and target oil reservoir 6 is reacted, conducted heat, mass transfer and infiltration,
Because reacting gas has preset temperature, the viscosity of crude oil declines in the presence of the temperature, improves the mobility of crude oil, and
And the temperature is in oil reservoir transmittance process so that oil reservoir generates thermograde, forms different heating tapes, is advantageous to original
The flowing of oil.CO in reacting gas2Mixed with crude oil, the CO2The displacement of reservoir oil can be played a part of；And in reacting gas
Water vapour can reduce Crude viscosity, improve crude oil fluidity.Under the driving of motive power, crude oil is by the reaction gas of high temperature
Body drives, because the pressure at producing well 1 is smaller, so, crude oil is to flowing at producing well 1, so as in interface channel 3 and oil recovery
Crude oil flow passage is formd between well 1, crude oil is delivered at producing well 1 via crude oil flow passage.Oil recovery in producing well 1
Equipment is by crude oil collection and is delivered to ground 5.Wherein, reacting gas can also be delivered to ground 5 by producing well 1, be carried out follow-up
Processing and application.
When it is implemented, the temperature of reacting gas caused by coal gasification reaction is carried out in coal gasification passage 2 can pass through tune
Gasification process parameter in gasification reaction of economizing on coal, specifically, can be by adjusting gasifying agent so that reacting gas has preset temperature
Flow, the pressure of gasifying agent, oxygen concentration, water-carrying capacity, the input position etc. of gasifying agent, adjust the composition and temperature of reacting gas
Degree, to ensure that the temperature of reacting gas meets the requirement of the displacement of reservoir oil, ensures being smoothed out for the displacement of reservoir oil.
As can be seen that in the present embodiment, by the way that coal gasification passage 2 is connected with target oil reservoir 6, then coal gasification passage 2
The reacting gas of preset temperature can be fed directly in target oil reservoir 6 caused by interior carry out coal gasification reaction, the reacting gas
The thermal source of the displacement of reservoir oil is acted not only as, oil reservoir is heated, Crude viscosity is reduced, improves the mobility of crude oil, realize heat
The effect of the displacement of reservoir oil, also, the CO in reacting gas2Mixed, played a part of in the displacement of reservoir oil, and reacting gas with crude oil
Water vapour can further reduce Crude viscosity, also play the effect of the displacement of reservoir oil, the effect of steam flooding be realized, without other
Equipment produces water vapour, greatlys save water vapour and produces consumed resource, additionally it is possible to the temperature of water vapour is effectively ensured, subtracts
Lack the heat loss of water vapour, be effectively improved the effect of the displacement of reservoir oil, it is ensured that the recovery ratio of crude oil, and equipment investment is few,
It is cost-effective.
With continued reference to Fig. 2 and Fig. 3, in above-described embodiment, connecting tube can be provided with interface channel 3, connecting tube is placed in
Part in target oil reservoir 6 offers multiple perforates, so that interface channel 3 preferably connects with target oil reservoir 6.Specifically, even
It can be screen casing to take over the part being placed in target oil reservoir 6, and target oil reservoir 6 is disclosed to form duct.Screen casing can be that slot sieves
Pipe or wire-wrapped screen, preferably cutting seam sieve tube.Can also, connecting tube is placed in target oil reservoir 6 by perforating system
Part opens up multiple perforates.
Flow string can be provided with producing well 1, the part that flow string is placed in target oil reservoir 6 offers multiple perforates,
So that producing well 1 preferably connects with target oil reservoir 6, it is easy to crude oil and reacting gas being collected, improves oil recovery efficiency,
Avoiding the open-ended at the second end of only producing well 1 causes to block.Specifically, the part that flow string is placed in target oil reservoir 6
It can be screen casing, preferably be connected with target oil reservoir 6 with forming duct, be easy to receive more crude oil and reacting gas.Screen casing
Can be cutting seam sieve tube or wire-wrapped screen, preferably cutting seam sieve tube.The material of screen casing can be fiberglass.Can also, lead to
Cross perforating system and the part that flow string is placed in target oil reservoir 6 is opened up into multiple perforates.
Connecting tube can be provided with interface channel 3, the part that connecting tube is placed in target oil reservoir 6 offers multiple open
Hole；And/or flow string can be provided with producing well 1, the part that flow string is placed in target oil reservoir 6 offers multiple perforates.
That is, can be only that connecting tube can be provided with interface channel 3, the portion that connecting tube is placed in target oil reservoir 6 separates
Provided with multiple perforates；Can also be only that flow string, the portion that flow string is placed in target oil reservoir 6 can be provided with producing well 1
Separately it is provided with multiple perforates；It is also possible that can be provided with connecting tube in interface channel 3, connecting tube is placed in target oil reservoir 6
Part offers multiple perforates, also, flow string can be provided with producing well 1, the part that flow string is placed in target oil reservoir 6
Offer multiple perforates.
As can be seen that in the present embodiment, the part being placed in by the inner connection tube of connecting pipe 9 in target oil reservoir 6 offers
Perforate, enable to the reacting gas of conveying in connecting tube to be preferably in contact with target oil reservoir 6, increase area of section, more
Realize the displacement of reservoir oil well；The part that flow string is placed in target oil reservoir 6 in producing well 1 offers perforate, enables to flow string more
It is in contact with target oil reservoir 6 well, is easy to gather the crude oil near flow string, improves the efficiency of oil recovery.
With continued reference to Fig. 2 and Fig. 3, in the various embodiments described above, the fossil energy mining system can also include：Air guide well 8
With connecting pipe 9.Wherein, air guide well 8 is worn to target oil reservoir 6 by ground 5, and specifically, the first end of air guide well 8 is (shown in Fig. 2
Upper end) be connected with ground 5, air guide well 8 wears rock stratum, coal seam 7, the second end (lower end shown in Fig. 2) of air guide well 8 successively
It is placed in target oil reservoir 6 and is connected with target oil reservoir 6, and, the second end of air guide well 8 is placed in the default depth of target oil reservoir 6
At degree.The predetermined depth is the distance between top of the second end and the target oil reservoir 6 of air guide well 8, and the predetermined depth can root
Determined according to actual conditions, the present embodiment does not do any restrictions to this.
The side wall of air guide well 8 offers opening, and opening is connected by connecting pipe 9 with the first end of coal gasification passage 2.
Specifically, air guide well 8 is placed in rock stratum or the part in coal seam 7 and offers opening, the first end (left side shown in Fig. 2 of connecting pipe 9
End) and opening in communication, the second end (right-hand member shown in Fig. 2) of connecting pipe 9 be connected with the second end of coal gasification passage 2.
Air guide well 8 forms interface channel 3 by opening to the part being placed in target oil reservoir 6 and connecting pipe 9, that is,
Say, air guide well 8 forms interface channel 3 by the part of opening to the second end with connecting pipe 9.Air guide well 8 is placed in target oil reservoir 6
Part there is pre-determined distance with producing well 1.Traffic organising switch is provided with interface channel 3, traffic organising switch is used
It is connected in control coal gasification passage 2 with the first end of air guide well 8, or control coal gasification passage 2 is connected with target oil reservoir 6
It is logical, that is to say, that it is the first end output by air guide well 8 that reacting gas is produced in traffic organising switch control coal gasification passage 2
Still it is delivered in target oil reservoir 6.
Airway tube can be provided with air guide well 8, the part that airway tube is placed in target oil reservoir 6 offers multiple perforates.
Specifically, the part that the airway tube is placed in target oil reservoir 6 can be screen casing, and screen casing can be for cutting seam sieve tube or around bolting silk
Pipe, preferably cutting seam sieve tube.The material of screen casing can be fiberglass.Can also, air guide well 8 is placed in by mesh by perforating system
Part in mark oil reservoir 6 opens up multiple perforates.
During work, gasifying agent conveys gasifying agent via the gasifying agent conveying equipment in inlet well 4 into coal gasification passage 2,
Control coal gasification passage 2 is switched by traffic organising with the first end of air guide well 8 to be connected, then the first of coal gasification passage 2
Lighted a fire at end, with coal coal gasification reaction occurs for coal seam 7 of igniting, gasifying agent, produces the reacting gas with preset temperature, reaction gas
Body can be delivered in air guide well 8 by the first end of coal gasification passage 2 by connecting pipe 9, and defeated by the first end of air guide well 8
Go out to ground.The concentration and flow of the gasifying agent inputted by adjusting gasifying agent conveying equipment, the combustion zone of coal gasification is cultivated, directly
Tended towards stability to burning.At this moment, traffic organising switch control coal gasification passage 2 is connected with target oil reservoir 6, and regulation gasifying agent is defeated
Send the concentration and flow etc. for the gasifying agent that equipment inputs, to improve the gas injection pressure of inlet well 4, then corresponding air guide Jing8Chu
Pressure is smaller, then reacting gas is delivered in air guide well 8 by the first end of coal gasification passage by interface channel 3.Due to air guide
The first end closing of well 8, so, reacting gas is delivered in target oil reservoir 6 by the second end of air guide well 8.
As can be seen that in the present embodiment, the opening that air guide well 8 opens up is connected by connecting pipe 9 with coal gasification passage,
Reacting gas in coal gasification passage is delivered in target oil reservoir 6, also, reduces equipment, greatly reduces throwing
Money.
With continued reference to Fig. 2 and Fig. 3, in the various embodiments described above, gasifying agent conveying equipment, gas can be provided with inlet well 4
Agent conveying equipment is movably positioned in coal gasification passage 2 from the first end of coal gasification passage 2 to the second end.Specifically, will
The first end of coal gasification passage 2 is front end, is rear end by the second end of coal gasification passage 2, by the first of coal gasification passage 2
The mode to the movement of the second end then to retreat is held to move, after the gasifying agent conveying equipment in inlet well 4 uses gasifying agent progressively
The mode moved back is conveyed.
As can be seen that in the present embodiment, gasifying agent is carried out using by way of progressively retreating gasifying agent conveying equipment
Conveying, gasifying agent is enabled to carry out sufficient gasification reaction with coal, additionally it is possible to so that caused reacting gas is through interface channel 3
More successfully it is delivered in target oil reservoir 6, is easy to the displacement of reservoir oil.
With continued reference to Fig. 2 and Fig. 3, in the various embodiments described above, inlet well 4 is horizontal orientation well, in order to which gasifying agent is defeated
Deliver in coal gasification passage 2.
Air guide well 8 is peupendicular hole or horizontal directional drilling, then the type that air guide well 8 is set can be according to actual conditions come really
Fixed, the present embodiment does not do any restrictions to this.
Producing well 1 is peupendicular hole or horizontal directional drilling, then the type that producing well 1 is set can according to actual conditions come
It is determined that the present embodiment does not do any restrictions to this.
Referring to Fig. 2, when air guide well 8 and producing well 1 are peupendicular hole, part that air guide well 8 is placed in target coal seam 6 with
The part that producing well 1 is placed in target coal seam 6 has pre-determined distance in the horizontal direction.Specifically, producing well 1 can be placed in and lead
The left side (for Fig. 2) of gas well 8, the right side of air guide well 8 can also be placed in.Air guide well 8 and producing well 1 are in the horizontal direction
There is pre-determined distance, the second end that the pre-determined distance is used to make air guide well 8 is with recovering the oil on (direction from left to right shown in Fig. 2)
Crude oil flow passage is formed between second end of well 1, it is ensured that in Crude Oil Transportation to producing well 1.When it is implemented, the pre-determined distance
It can be determined according to actual conditions, the present embodiment is not intended to be limited in any to this.
Referring to Fig. 3, when air guide well 8 and producing well 1 are horizontal orientation well, horizontal segment and the producing well 1 of air guide well 8
Horizontal segment has pre-determined distance in vertical direction.Specifically, the horizontal segment of air guide well 8 is placed in target oil reservoir 6, then air guide well
Airway tube in 8 horizontal segment offers multiple perforates.The horizontal segment of producing well 1 is placed in target oil reservoir 6, then producing well 1
Flow string in horizontal segment offers multiple perforates.Crude oil flow passage is the level of the horizontal segment in air guide well 8 and producing well 1
Formed between section.The horizontal segment of air guide well 8 is with the horizontal segment of producing well 1 in the vertical direction (side from top to bottom shown in Fig. 3
To) on there is pre-determined distance, the pre-determined distance is used to form crude oil flow passage, it is ensured that in Crude Oil Transportation to producing well 1.Specifically
During implementation, the pre-determined distance can determine that the present embodiment is not intended to be limited in any to this according to actual conditions.Air guide well 8 hangs down
The distance between straight section and vertical section of producing well 1 can determine that the present embodiment does not do any limit to this according to actual conditions
System.
It should be noted that the fossil energy recovery method and system principle in the present invention are identical, related part can phase
Mutual reference.
In summary, in the present embodiment, the reaction gas of preset temperature caused by coal gasification reaction is carried out in coal gasification passage 2
Body can be fed directly in target oil reservoir 6, and the reacting gas acts not only as the thermal source of the displacement of reservoir oil, and oil reservoir is heated,
Crude viscosity is reduced, the mobility of crude oil is improved, realizes the effect of the hot displacement of reservoir oil, also, the CO in reacting gas2Enter with crude oil
Row mixing, Crude viscosity can further be reduced by playing a part of the water vapour in the displacement of reservoir oil, and reacting gas, also play drive
The effect of oil, realizes the effect of steam flooding, and water vapour is produced without other equipment, greatlys save water vapour generation and is disappeared
The resource of consumption, additionally it is possible to the temperature of water vapour is effectively ensured, reduces the heat loss of water vapour, is effectively improved the effect of the displacement of reservoir oil
Fruit, it is ensured that the recovery ratio of crude oil, and equipment investment is few, and it is cost-effective.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (15)
1. a kind of fossil energy recovery method, it is characterised in that comprise the following steps：
Shaft building step, by the object-oriented oil reservoir drilling oil well in ground, and pre-established in the coal seam above the target oil reservoir
Interface channel is established between the first end of coal gasification passage and the target oil reservoir；Wherein, the interface channel and the oil recovery
There is pre-determined distance between well；
Gasification step, by conveying gasification into the coal gasification passage from the inlet well that ground pre-establishes into the coal seam
Agent, coal and the gasifying agent carry out coal gasification reaction, produce the reacting gas with preset temperature, described in the reacting gas warp
Interface channel is delivered to the target oil reservoir；Wherein, the inlet well is connected with the second end of the coal gasification passage；
Displacement of reservoir oil step, the reacting gas are reacted with the crude oil in the target oil reservoir, and drive the crude oil to described
Moved at producing well；
Oil recovery step, the crude oil around the producing well is gathered, and be delivered to ground.
2. fossil energy recovery method according to claim 1, it is characterised in that in the shaft building step,
Air guide well is bored from ground to the target oil reservoir, the side wall of the air guide well offers opening, and the opening passes through connection
Pipeline is connected with the first end of the coal gasification passage；
The air guide well forms the connection from the opening to the part being placed in the target oil reservoir and the connecting pipe
Passage.
3. fossil energy recovery method according to claim 1 or 2, it is characterised in that in the shaft building step,
Connecting tube is provided with the interface channel, the part that the connecting tube is placed in the target oil reservoir offers multiple open
Hole.
4. fossil energy recovery method according to claim 2, it is characterised in that the air guide well is peupendicular hole or level
Directed drilling.
5. fossil energy recovery method according to claim 1, it is characterised in that in the shaft building step,
The producing well is peupendicular hole or horizontal directional drilling.
6. fossil energy recovery method according to claim 2, it is characterised in that in the shaft building step,
When the air guide well and the producing well are peupendicular hole, the air guide well has in the horizontal direction with the producing well
There is pre-determined distance；
When the air guide well and the producing well are horizontal orientation well, horizontal segment and the producing well of the air guide well
Horizontal segment has pre-determined distance in vertical direction.
7. fossil energy recovery method according to claim 1, it is characterised in that in the gasification step,
The first end of gasifying agent from the coal gasification passage of the inlet well conveying progressively conveys to the second end.
8. fossil energy recovery method according to claim 1, it is characterised in that in the gasification step,
By adjusting gasification process parameter in the coal gasification reaction so that the reacting gas has the preset temperature.
9. fossil energy recovery method according to claim 1, it is characterised in that in the oil recovery step,
Flow string is provided with the producing well, the part that the flow string is placed in the target oil reservoir offers multiple open
Hole.
A kind of 10. fossil energy mining system, it is characterised in that including：Inlet well (4), coal gasification passage (2), interface channel
And producing well (1) (3)；Wherein,
The inlet well (4) is worn into the coal seam (7) above target oil reservoir (6) by ground (5), the inlet well (4) and institute
The second end for stating coal gasification passage (2) is connected, the first end of the coal gasification passage (2) by interface channel (3) with it is described
Target oil reservoir (6) is connected, and the coal gasification passage (2) is used to carry out reaction gas of the coal gasification reaction generation with preset temperature
Body, and the reacting gas is delivered in the target oil reservoir (6), the reacting gas is used to drive the target oil reservoir
(6) the crude oil movement in；
The producing well (1) is worn into the target oil reservoir (6) by ground (5), and the producing well (1) is used to gather the original
Oil, and by the Crude Oil Transportation collected to ground (5)；
The interface channel (3) has pre-determined distance with the producing well (1).
11. fossil energy mining system according to claim 10, it is characterised in that
Connecting tube is provided with the interface channel (3), the part that the connecting tube is placed in the target oil reservoir (6) offers
Multiple perforates；And/or
Flow string is provided with the producing well (1), the part that the flow string is placed in the target oil reservoir (6) offers more
Individual perforate.
12. fossil energy mining system according to claim 10, it is characterised in that also include：Air guide well (8) and connection
Pipeline (9)；Wherein,
The air guide well (8) is worn to the target oil reservoir (6), the side wall of the air guide well (8) by ground (5) and offered out
Mouthful, the opening is connected by the connecting pipe (9) with the first end of the coal gasification passage (2), the air guide well (8)
By the opening interface channel (3) is formed to the part being placed in the target oil reservoir (6) with the connecting pipe (9)；
The part that the air guide well (8) is placed in the target oil reservoir (6) has pre-determined distance with the producing well (1).
13. fossil energy mining system according to claim 12, it is characterised in that
Airway tube is provided with the air guide well (8), the part that the airway tube is placed in the target oil reservoir (6) offers more
Individual perforate.
14. fossil energy mining system according to claim 10, it is characterised in that be provided with the inlet well (4)
Gasifying agent conveying equipment, the gasifying agent conveying equipment from the first end of the coal gasification passage (2) to the second end movably
It is placed in the coal gasification passage (2).
15. fossil energy mining system according to claim 12, it is characterised in that
The inlet well (4) is horizontal orientation well；
The air guide well (8) is peupendicular hole or horizontal directional drilling；
The producing well (1) is peupendicular hole or horizontal directional drilling.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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