CN107345480A - A kind of method of heating oil shale reservoir - Google Patents
A kind of method of heating oil shale reservoir Download PDFInfo
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- CN107345480A CN107345480A CN201610288510.2A CN201610288510A CN107345480A CN 107345480 A CN107345480 A CN 107345480A CN 201610288510 A CN201610288510 A CN 201610288510A CN 107345480 A CN107345480 A CN 107345480A
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- Prior art keywords
- oil shale
- heating medium
- heating
- heated
- well
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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
- E21B43/241—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection combined with solution mining of non-hydrocarbon minerals, e.g. solvent pyrolysis of oil shale
Abstract
The present invention relates to a kind of method of heating oil shale reservoir, including:Producing well and heated well are constructed respectively in the oil shale zones of target reservoir;By gas equipment processed into gas-booster injection heating medium with to heating medium pressurize;Heating medium after pressurization is injected into dielectric heater so that heating medium is heated into predetermined temperature;Heating medium after heating is injected into oil shale zones to be heated to the oil shale in oil shale zones by heated well;Oil shale is heated by heating medium, oil shale is pyrolyzed, so as to generate thermal decomposition product so that thermal decomposition product, which is flowed into producing well and produced, arrives ground;By being separated to the thermal decomposition product produced in producing well, with generate respectively can heat heating medium hydrocarbon gas and the heating medium recycled in heated well can be re-injected into after gas-booster and dielectric heater successively.This method has harvest efficiency high and harvests sweeping advantage.
Description
Technical field
The present invention relates to technical field of oil shale on-site exploitation, more particularly to a kind of side of heating oil shale reservoir
Method.
Background technology
Oil shale in-situ exploitation refers to that temperature is typically about by being heated at high temperature to oil shale formation
350-500 DEG C, the solid kerogen in oil shale is converted into liquid hydrocarbon, then bore by traditional petroleum gas
The process that well DP technology comes out liquid hydrocarbon from underground mining.With the gradual increase of environmental protection pressure, oil shale
In-situ retorting is the inexorable trend for carrying out being commercialized large-scale development oil shale future.
Oil shale in-situ production technique can be divided into fluid heating, radiant heating and combustion heating etc. by mode of heating,
Wherein, fluid heating technique is because with firing rate is fast, heating cycle is short and carbonization gas etc. can be made full use of excellent
Point and by extensive concern.
It is currently undertaken by the main CRUSH skills for including Chevron Corporation (Stardard Oil Company of California) of oil shale in-situ exploitation heating technique research
Art;The CCR technologies of American Shale Oil LLC (American Shale Oil Corp, abbreviation AMSO)
(Conduction, Convection, Reflux conduction, convection current, backflow);Asian Group of Israel
IIST-VTPC technologies (Israel In-Situ Technology-Volume, Temperature, Pressure,
Chemical Reactions)。
The method that above-mentioned company is illustrated also is in conceptual design or interior for oil shale in-situ production technique
Conceptual phase, do not elaborate on how to realize the injection and circulation of high temperature and high pressure gas.It is then desired to carry
For a kind of efficient, environmental protection, the method for economic heating oil shale reservoir.
The content of the invention
In view of the above-mentioned problems, a kind of method of heating oil shale reservoir is proposed according to the present invention, including:In mesh
The oil shale zones of mark reservoir construct producing well and heated well respectively;Noted by gas equipment processed into gas-booster
Enter to heat medium to be pressurizeed to the heating medium;The heating medium after pressurization is injected into medium to add
So that the heating medium is heated into predetermined temperature in hot device;The heating medium after heating is added by described
Hot well is injected into the oil shale zones to be heated to the oil shale in the oil shale zones;Pass through institute
State heating medium to heat the oil shale, the oil shale is pyrolyzed, so as to generate pyrolysis production
Thing so that the thermal decomposition product, which is flowed into the producing well and produced, arrives ground;By to being adopted in the producing well
The thermal decomposition product gone out is separated, to generate the hydrocarbon gas and energy that can heat the heating medium respectively
It is enough to re-inject into the heated well after the gas-booster and the dielectric heater successively
The heating medium that row recycles.According to the application, will can be divided using the present processes by the thermal decomposition product
From rear generation heating medium back within ground with continue cycling through use, i.e. can be again be injected into
Pressurizeed in gas-booster, be then injected into dielectric heater and heated, so as to be noted by heated well
Enter into oil shale zones to be heated to the oil shale in oil shale zones.So, just cost savings
Resource, energy is fully utilized, being finally reached need not the extraneous self-loopa system for supplying energy
System.
In addition, the hydrocarbon gas after thermal decomposition product separates can add to the heating medium in dielectric heater
Heat, so as to reach, the saving energy, cost are low, workable, harvest efficiency is high and harvesting is sweeping
Advantage.
In one embodiment, after the producing well and the heated well has been constructed, insulation sleeve pipe is passed through
To carry out completion to the producing well and the heated well respectively.By the way that insulation sleeve pipe is respectively sleeved at into this
On the periphery wall of producing well and heated well, insulation is carried out to the producing well and heated well so as to play
Effect, avoid temperature of the heating medium in producing well and heated well from reducing too fast, cause heat to scatter and disappear seriously
Drawback.
In one embodiment, methods described also includes by being exploded to the producing well and the heated well
It is or artificial reconstructed to improve the porosity and permeability of the target reservoir.
In one embodiment, the pressure of the heating medium after pressurization is more than the reservoir pressure of the oil shale
Power.
In one embodiment, the predetermined temperature of the heating medium after heating is more than the oil shale
Pyrolysis temperature.
In one embodiment, by being exploded to the producing well and the heated well or artificial reconstructed, with
The diaclase in the target reservoir, and enable the crack to be respectively communicated with the producing well and the heating
Well.
In one embodiment, the thermal decomposition product is transported to the surface of the target reservoir by oil pumper,
The thermal decomposition product is led into three phase separator to be separated the thermal decomposition product so as to generate after cooling
Oil gas water, oil, water and admixture of gas are generated by being separated to the oil gas water.
In one embodiment, the thermal decomposition product is flowed into the producing well through the crack.
In one embodiment, the admixture of gas includes the heating medium and the hydrocarbon gas.
In one embodiment, methods described also includes the difference according to the heating medium, corresponding to select
The gas equipment processed.
Compared with prior art, according to the application, will can be separated using the present processes by the thermal decomposition product
The heating medium generated afterwards back within ground with continue cycling through use, i.e. can be again be injected into gas
Pressurizeed in body supercharger, be then injected into dielectric heater and heated, so as to be injected by heated well
To be heated to the oil shale in oil shale zones in the oil shale zones of target reservoir.So, just significantly
Ground saves resource, energy is fully utilized, and being finally reached extraneous need not supply energy
Self-circulation system.
In addition, the hydrocarbon gas after thermal decomposition product separates can add to the heating medium in dielectric heater
Heat, so as to reach, the saving energy, cost are low, workable, harvest efficiency is high and harvesting is sweeping
Advantage.
Brief description of the drawings
The invention will be described in more detail below based on embodiments and refering to the accompanying drawings.Scheming
In:
Fig. 1 is the step schematic flow sheet of the method for the heating oil shale reservoir of embodiments herein.
Fig. 2 is the structural representation of the heating oil shale reservoir of the application.
In the accompanying drawings, identical part uses identical reference.Accompanying drawing is not retouched according to the ratio of reality
Paint.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
For in the prior art also not on how high temperature and high pressure gas to be injected into oil shale, and make
The high temperature and high pressure gas that must be returned on ground can continue to the record in terms of recycling, thus, the application is proper
It is the method for proposing heating oil shale reservoir for this technical problem.Next, by the specific of this method
Step is described in detail.
The magnitude range of the temperature of above-mentioned high temperature and high pressure gas be more than or equal to 350 degree and be less than or equal to 500 degree,
The magnitude range of the gas pressure of the high temperature and high pressure gas is more than or equal to 2MPa (MPa) and is less than or equal to
5MPa (MPa).
As depicted in figs. 1 and 2, wherein, Fig. 1 schematically shows that this method includes:
Step S410, producing well 2 and heated well 3 are constructed respectively in the oil shale zones 11 of target reservoir 1.
Wherein, the producing well 2 and heated well 3 are straight well and are from the corresponding oil shale zones 11 of target reservoir 1
Surface carry out drilling well from top to bottom.
In one embodiment, the target reservoir 1 can be oil shale formation.
Step S420, by gas equipment 4 processed to gas increase machine 5 in injection heating medium 100 with to the heating
Medium 100 is pressurizeed.
In one embodiment, the heating medium 100 can be nitrogen or carbon dioxide.The heating medium 100 is led
It is used to be heated to the oil shale in target reservoir 1, i.e. by noting into heated well 3 as described below
Enter the heating medium 100 of HTHP, to heat the oil shale 7 in target reservoir 1, so that oil shale 7
In immature solid kerogen be changed into liquid hydrocarbon because being pyrolyzed, then pass through oil and gas well drilling again
DP technology is mined by producing well 2 from underground by the liquid hydrocarbon.
In a specific example, when the heating medium 100 is nitrogen, making nitrogen by pressure swing adsorption method can be used
To be manufactured to nitrogen, so as to ensure that the purity of nitrogen can be 98%, meanwhile, ensure to be made by gas equipment 4 processed
The pressure for the nitrogen produced is 0.7MPa (MPa), and temperature is 40 degree.
When the heating medium 100 is carbon dioxide, it is generally transported in liquid form, due to the liquid
Carbon dioxide need be heated, thus, the gas cylinder of generally use normal temperature and pressure is transported.
In the step s 420, the volume of the nitrogen injected by gas equipment 4 processed into gas-booster 5 can be
3000Nm3/ h (mark side/hour), i.e. the body that the nitrogen injects into gas-booster 5 in normal conditions
Product can be for 3000 cubic metres per hour.
In the step s 420, because the temperature resistant capability of gas-booster 5 is relatively low, thus, pass through gas equipment 4 processed
The heating medium 100 produced should first pass through the gas-booster 5 and be pressurizeed, when by the heating medium 100
After being pressurized to predetermined pressure, then the heating medium 100 is heated.
Further, since the heating medium 100 after pressurization needs to be heated, thus, the gas-booster 5 is last
It need not be cooled down after one stage of compression.
Gas pressure after above-mentioned heating medium 100 is pressurizeed by gas-booster 5 is 5MPa, temperature be more than
Equal to 90 degree and less than or equal to 110 degree.
Step S430, the heating medium 100 after pressurization is injected into dielectric heater 6 with by the heating medium
100 are heated to predetermined temperature.
The dielectric heater 6 can be gas heater, and the pressure-resistant size of the gas heater is 5MPa, highest
Heating-up temperature is 800 degree, so as to meet the oil shale zones 11 being injected into nitrogen in target reservoir 1
Demand.
For above-mentioned heating medium 100 after the heating of dielectric heater 6, the temperature of the heating medium 100 is reachable
To 500 degree or so.
Step S440, the heating medium 100 after heating is injected into oil shale zones 11 by heated well 3,
To be heated in oil shale zones 11 oil shale 7.
Step S450, oil shale 7 is heated by heating medium 100, oil shale 7 is pyrolyzed,
So as to generate thermal decomposition product 8 so that thermal decomposition product 8 is flowed into producing well 2 and produced to ground.
Step S460, by being separated to the thermal decomposition product 8 in producing well 2, it can be heated with generating respectively
Heat medium 100 hydrocarbon gas 81 and can be successively after gas-booster 5 and dielectric heater 6
The heating medium 100a recycled is re-injected into heated well 3.As can be seen here, the present processes
Developed under the conditions of can ensureing oil shale 7 in the original location with relatively low cost.Simultaneously, additionally it is possible to stored up in target
Realize the temperature to heating medium 100, pressure and injected slurry volume in the surface (i.e., on the ground) of layer 1
Constantly control, so as to greatly increase the quality of generation oil gas.
In addition, the heating medium 100a generated after the separation of thermal decomposition product 8 can back within ground to continue
Recycle, i.e. can be again be injected into gas-booster 5 is pressurizeed, and is then injected into medium
Heated in heater 6, so as to be injected into by heated well 3 in oil shale zones 11, so as to oily page
Rock 7 is heated.So, it just cost savings resource, energy be fully utilized, most
Reaching eventually need not the extraneous self-circulation system for supplying energy.
In addition, the hydrocarbon gas 81 after the separation of thermal decomposition product 8 can be situated between to the heating in dielectric heater 6
Matter 100 is heated, the saving energy, cost are low, workable, harvest efficiency is high so as to having reached and
Harvest sweeping advantage.
As shown in Fig. 2 after producing well 2 and heated well 3 has been manufactured, by insulation sleeve pipe 9 to distinguish
Completion is carried out to producing well 2 and heated well 3.Specifically, by the way that insulation sleeve pipe 9 is respectively sleeved at into this
On the periphery wall of producing well 2 and heated well 3, protected so as to play to the producing well 2 and heated well 3
The heat-insulated effect of temperature, avoid temperature of the heating medium 100 in producing well 2 and heated well 3 from reducing too fast, lead
Pyrogenicity amount is scattered and disappeared the drawbacks of serious.
The present processes are also included by being exploded to producing well 2 and heated well 3 or artificial reconstructed, to carry
The porosity and permeability of high target reservoir 1.Wherein, above-mentioned artificial reconstructed mode can be acidifying or waterpower pressure
Split.However, be well known for ordinary skill in the art due to above-mentioned artificial reconstructed mode, to save
For the sake of length, it is not detailed herein.
As shown in Fig. 2 the pressure of the heating medium 100 after pressurization is more than the reservoir pressure of oil shale 7.So,
Pressure due to heating medium 100 is more than the reservoir pressure of oil shale 7, so that the energy of heating medium 100
Enough it is smoothly injecting into the region of corresponding oil shale 7 of the heated well 3, to be heated to oil shale 7.
The predetermined temperature of heating medium 100 after heating is more than the pyrolysis temperature of oil shale 7.So, can make
Obtaining the oil shale 7 can be successfully pyrolyzed.Further, since from medium heating 6 to heated well 3
It is longer along journey route, it is contemplated that in the injection process of heating medium 100 along journey heat loss, the heating need to be caused
The predetermined temperature of medium 100 is more than the pyrolysis temperature of oil shale 7.
In one embodiment, the predetermined temperature can be 500 degree.
As shown in Fig. 2 by carrying out above-mentioned hydraulic fracturing to producing well 2 and heated well 3, with target reservoir
Diaclase 12 in 1, and enable the crack 12 to be respectively communicated with producing well 2 and heated well 3.As can be seen here,
The formation in the crack 12, flow channel is provided for the flowing trend of thermal decomposition product 8.
In a specific embodiment, the crack 12 can be one or more left in target reservoir 1
The crack 12 that length does not wait, so as to be established between the producing well 2 and heated well 3 in target reservoir 1
Play a new fluid passage.As can be seen here, the formation in the crack 12, the production of Oil/gas Well is greatly increased
Amount.
After above-mentioned thermal decomposition product 8 enters producing well 3, thermal decomposition product 8 is transported to by oil pumper 10
The surface 13 (earth's surface) of the target reservoir 1, leads to three phase separator 20 by the thermal decomposition product 8 after cooling
To be separated to the thermal decomposition product 8, so as to generate oil gas water 30, by oil gas water 30 is separated with
Generation oil 40, water 50 and admixture of gas 60.Wherein, the admixture of gas 60 includes heating medium 100a
With hydrocarbon gas 81.
After the oil gas water 30 is transported into earth's surface by oil pumper 10, after being cooled down to the oil gas water 30,
Separated and measured by the three phase separator 20.Wherein, the oil 40 and water 50 isolated can pass through whirlpool
Flowmeters are measured, and hydrocarbon gas 81 and heating medium 100a can be measured by orifice flowmeter.
Above-mentioned turbine flowmeter and orifice flowmeter, which have, measures the advantages of accurate, further, since the turbine flow
The structure and purposes of gauge and orifice flowmeter are as well known to those skilled in the art, are risen to save length
See, this is not described further.
Above-mentioned thermal decomposition product 8 is flowed into producing well 2 through crack 12.
In one embodiment, this method also includes the difference according to heating medium 100, to select to make accordingly
Gas equipment 4.Specifically, can be according to the difference that the heating medium 100 is nitrogen or carbon dioxide, to select phase
The gas equipment 4 processed answered.
In summary, the heating medium generated after being separated using the present processes by the thermal decomposition product 8
100a back within ground with continue cycling through use, i.e. can be again be injected into gas-booster 5
Pressurizeed, be then injected into dielectric heater 6 and heated, so as to be injected into oily page by heated well 3
To be heated to oil shale 7 in rock 7.So, it just cost savings resource, energy obtained
Sufficiently utilize, being finally reached need not the extraneous self-circulation system for supplying energy.
In addition, the hydrocarbon gas 81 after the separation of thermal decomposition product 8 can be situated between to the heating in dielectric heater 6
Matter 100 is heated, the saving energy, cost are low, workable, harvest efficiency is high so as to having reached and
Harvest sweeping advantage.
Although by reference to preferred embodiment, invention has been described, is not departing from the scope of the present invention
In the case of, various improvement can be carried out to it and part therein can be replaced with equivalent.Especially, only
Otherwise structural hazard be present, the every technical characteristic being previously mentioned in each embodiment can combine in any way
Come.The invention is not limited in specific embodiment disclosed herein, but including falling within the scope of the appended claims
All technical schemes.
Claims (10)
1. a kind of method of heating oil shale reservoir, including:
Producing well and heated well are constructed respectively in the oil shale zones of target reservoir;
By gas equipment processed into gas-booster injection heating medium with to it is described heating medium pressurize;
The heating medium after pressurization is injected into dielectric heater pre- so that the heating medium to be heated to
Constant temperature degree;
The heating medium after heating is injected into the oil shale zones with to institute by the heated well
The oil shale stated in oil shale zones is heated;
The oil shale is heated by the heating medium, the oil shale is pyrolyzed, so as to
Generate thermal decomposition product so that the thermal decomposition product, which is flowed into the producing well and produced, arrives ground;
By being separated to the thermal decomposition product produced in the producing well, institute can be heated to generate respectively
State heating medium hydrocarbon gas and can be successively after the gas-booster and the dielectric heater
The heating medium recycled is re-injected into the heated well.
2. the method for heating oil shale reservoir according to claim 1, it is characterised in that having constructed
After stating producing well and the heated well, by insulation sleeve pipe with respectively to the producing well and the heated well
Carry out completion.
3. the method for heating oil shale reservoir according to claim 2, it is characterised in that methods described is also
Including by being exploded to the producing well and the heated well or artificial reconstructed to improve the target reservoir
Porosity and permeability.
4. the method for heating oil shale reservoir according to claim 1, it is characterised in that the institute after pressurization
The pressure for stating heating medium is more than the reservoir pressure of the oil shale.
5. the method for heating oil shale reservoir according to claim 1, it is characterised in that the institute after heating
The predetermined temperature for stating heating medium is more than the pyrolysis temperature of the oil shale.
6. the method for heating oil shale reservoir according to claim 3, it is characterised in that by described
Producing well and the heated well are exploded or artificial reconstructed, with the diaclase in the target reservoir, and are made
The producing well and the heated well can be respectively communicated with by obtaining the crack.
7. the method for heating oil shale reservoir according to claim 1, it is characterised in that pass through oil pumper
The thermal decomposition product is transported to the surface of the target reservoir, the thermal decomposition product is led into three-phase after cooling
Separator to the thermal decomposition product to be separated so as to generate oil gas water, by being separated to the oil gas water
With generation oil, water and admixture of gas.
8. the method for heating oil shale reservoir according to claim 6, it is characterised in that the pyrolysis production
Thing is flowed into the producing well through the crack.
9. the method for heating oil shale reservoir according to claim 7, it is characterised in that the gas mixes
Compound includes the heating medium and the hydrocarbon gas.
10. the method for heating oil shale reservoir according to claim 1, it is characterised in that methods described
Also include the difference according to the heating medium, to select the corresponding gas equipment processed.
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Cited By (7)
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CN108487888A (en) * | 2018-05-24 | 2018-09-04 | 吉林大学 | For improving oil shale in-situ exploitation rate of oil and gas recovery assisted heating device and method |
CN108756839A (en) * | 2018-06-04 | 2018-11-06 | 西安科技大学 | The heat-insulated synergy converted in-situ method and system of oil shale |
CN109779582A (en) * | 2019-02-02 | 2019-05-21 | 吉林大学 | A kind of method that hydrocarbon compound in in-situ extraction oil shale is heated in underground |
CN110318722A (en) * | 2018-03-30 | 2019-10-11 | 中国石油化工股份有限公司 | Ground layer for heating extracts oil gas system and method |
CN110513092A (en) * | 2019-09-18 | 2019-11-29 | 吉林大学 | A kind of exploitation of auxiliary oil shale in-situ catalytic combustion system and its application method |
CN112302599A (en) * | 2019-07-24 | 2021-02-02 | 中国石油化工股份有限公司 | Device and method for in-situ extraction of oil shale |
CN115095311A (en) * | 2022-07-15 | 2022-09-23 | 西安交通大学 | Low-grade shale resource development system and method |
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CN110318722A (en) * | 2018-03-30 | 2019-10-11 | 中国石油化工股份有限公司 | Ground layer for heating extracts oil gas system and method |
CN110318722B (en) * | 2018-03-30 | 2022-04-12 | 中国石油化工股份有限公司 | System and method for extracting oil gas by heating stratum |
CN108487888A (en) * | 2018-05-24 | 2018-09-04 | 吉林大学 | For improving oil shale in-situ exploitation rate of oil and gas recovery assisted heating device and method |
CN108756839A (en) * | 2018-06-04 | 2018-11-06 | 西安科技大学 | The heat-insulated synergy converted in-situ method and system of oil shale |
CN108756839B (en) * | 2018-06-04 | 2023-08-04 | 西安科技大学 | Oil shale heat insulation synergistic in-situ conversion method and system |
CN109779582A (en) * | 2019-02-02 | 2019-05-21 | 吉林大学 | A kind of method that hydrocarbon compound in in-situ extraction oil shale is heated in underground |
CN112302599A (en) * | 2019-07-24 | 2021-02-02 | 中国石油化工股份有限公司 | Device and method for in-situ extraction of oil shale |
CN110513092A (en) * | 2019-09-18 | 2019-11-29 | 吉林大学 | A kind of exploitation of auxiliary oil shale in-situ catalytic combustion system and its application method |
CN115095311A (en) * | 2022-07-15 | 2022-09-23 | 西安交通大学 | Low-grade shale resource development system and method |
CN115095311B (en) * | 2022-07-15 | 2024-01-12 | 西安交通大学 | Low-grade shale resource development system and method |
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