CN104533366B - Profile control channeling blocking method and device used in oil exploitation - Google Patents
Profile control channeling blocking method and device used in oil exploitation Download PDFInfo
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- CN104533366B CN104533366B CN201410592183.0A CN201410592183A CN104533366B CN 104533366 B CN104533366 B CN 104533366B CN 201410592183 A CN201410592183 A CN 201410592183A CN 104533366 B CN104533366 B CN 104533366B
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- injection
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- profile control
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- envelope
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/243—Combustion in situ
-
- 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
- E21B36/00—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/02—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using burners
Abstract
The invention provides a profile control channeling blocking method and device used in oil exploitation and relates to the technical field of oil exploitation. The profile control channeling blocking method comprises the steps of in-situ oil combustion ignition operation, obtaining air suction profile parameters and stratum parameters of in-situ oil combustion and determining the injection amount of a channeling blocking agent which is iron powder according to the air suction profile parameters and stratum parameters, injecting the profile control channeling blocking agent into an injection well according to the injection amount. By means of the profile control channeling blocking method and device, the problems that in the prior art, a gas channeling passage is easy to recover, oil yield is remarkably reduced, fuel in contact with air is only the fuel at immediate vicinity of a wellbore after an exploited oil reservoir is filled with the high-temperature gel profile control agent, and ignition time is possibly increased can be solved.
Description
Technical field
The present invention relates to technical field of petroleum extraction, particularly relate to method and dress that the envelope of the profile control in a kind of oil exploitation is altered
Put.
Background technology
Current in field of petroleum exploitation, combustion in situ oil production method has obtained relatively broad application.Combustion in situ is adopted
Oil is that the heavy component utilizing oil reservoir about 10% is as fuel, by injection air as oxygen material, the heat use produced of burning
Carry out displacement crude oil, thus recover the oil.It is applied widely that combustion in situ recovers the oil, and needed raw material is inexpensive, is a kind of great attraction
The thermal recovery mode of power.But combustion in situ recovers the oil, one significant deficiency of existence is that air onlap is serious, and top development degree is big, when
Exploitation enters certain degree, can cause has channeling, the most develop oil reservoir, and has channeling degree is bigger.
The generation of has channeling during in order to prevent combustion in situ, injects height it is generally required to inject at combustion in situ igniting forward direction in well
Temperature gel profile control agent, thus carries out deep profile controlling to oil reservoir high bleed-through road before gas injection, and during to avoid combustion in situ, has channeling sends out
Raw.But, after combustion in situ is lighted a fire, live wire as shown in Figure 1 advances section, (can exceed that owing to live wire temperature is higher
1000 DEG C), and current high temperature gel profile control agent resistance to elevated temperatures is poor, allots well section when live wire feeds through to, even at live wire
When also not arriving, high temperature gel profile control agent will be deteriorated.So, live wire leading edge profile radian is gradually increased, gas onlap
Degree is increasing, and the live wire 12 in Fig. 1 is less than 45 ° with the inclination angle theta on stratum, is further continued for forward impelling, will quickly break through to life
Produce well 11, easily make has channeling routing restoration, gas channeling phenomenon occurs, declines to a great extent from causing oil production rate.Further, for opening
Recovering the oil and hide, near wellbore zone remaining oil saturation is relatively low, and after injecting high temperature gel profile control agent, the fuel that air is contacted is the nearest
Well ground carrying fuel, may add the duration of ignition.
Summary of the invention
The embodiment of the present invention provides the profile control in a kind of oil exploitation to seal the method and device altered, to solve in prior art
Has channeling passage easily recovers, and oil production rate declines to a great extent, and has exploited oil reservoir and injecting after high temperature gel profile control agent, and air is connect
The fuel touched only has near wellbore zone fuel, the problem that may add the duration of ignition.
In order to achieve the above object, the present invention adopts the following technical scheme that
Profile control in a kind of oil exploitation seals the method altered, including:
Carry out combustion in situ ignition operation；
Obtain gas entry profile parameter and the formation parameter of combustion in situ, and according to described gas entry profile parameter and formation parameter
Determine that profile control envelope alters the injection rate of agent；It is iron powder that described profile control envelope alters agent；
In injection well, inject described profile control envelope according to described injection rate and alter agent.
Concrete, the granular size of described iron powder is 100 to 200 mesh granularities.
Further, after carrying out combustion in situ ignition operation, also include:
In described injection well, inject air, and detect injection profile envelope and alter the gas injection pressure of gas entry profile before agent.
It addition, injecting after described profile control envelope alters agent according to described injection rate to injecting in well, including:
Detection injection profile envelope alters the gas injection pressure of the gas entry profile after agent；
After the gas injection pressure of the gas entry profile before altering agent according to described injection profile envelope and injection profile envelope alter agent
The gas injection pressure of gas entry profile, determines whether the gas injection pressure injecting well increases.
It addition, injecting after described profile control envelope alters agent according to described injection rate to injecting in well, also include:
Judge that the air-breathing distribution injecting well near wellbore zone that injection profile seals after altering agent is the most uniform.
Concrete, described gas entry profile parameter include core intersection, the pressure of inspiration(Pi) of gas entry profile, live wire leading edge locus with
Inject the inclination angle on the distance of well shaft, described live wire leading edge and stratum；Described formation parameter includes formation porosity；
The gas entry profile parameter of described acquisition combustion in situ and formation parameter, including:
Monitor live wire leading edge locus according to microseism or time lapse seismic and inject the distance of well shaft and described live wire
Leading edge and the inclination angle on stratum；
Profile control in described oil exploitation seals the method altered, and also includes:
If it is determined that the gas injection pressure injecting well increases, and inclination angle threshold is preset more than one in the inclination angle on described live wire leading edge and stratum
Value, it is determined that profile control envelope is altered successfully.
Concrete, described determine that profile control envelope alters the injection rate of agent according to described gas entry profile parameter and formation parameter, including:
Determine that described profile control envelope alters the injection rate of agent according to equation below:
Wherein, Q is the injection rate that described profile control envelope alters agent；
The span of A is 1/3 to 1/2；
R is described live wire leading edge locus and the distance injecting well shaft；
H is described core intersection；
Φ is formation porosity；
θ is the inclination angle of described live wire leading edge and stratum.
Concrete, described described profile control envelope of injecting in injection well according to described injection rate alters agent, including:
In described injection well, preset injection rate injection described profile control envelope with one with slug formula injection mode and alter agent.
Concrete, a length of 0.5 to 1 meter of the injection of described slug formula injection mode；The note of described slug formula injection mode
Entering interval time is 6 to 8 hours；Described default injection rate is 80 to 100g/Nm3。
Profile control in a kind of oil exploitation seals the device altered, including:
Ignition operation unit, is used for carrying out combustion in situ ignition operation；
Profile control envelope is altered agent injection rate and is determined unit, for obtaining gas entry profile parameter and the formation parameter of combustion in situ, and
Determine that profile control envelope alters the injection rate of agent according to described gas entry profile parameter and formation parameter；It is iron powder that described profile control envelope alters agent；
Profile control envelope alters agent injection unit, alters agent for injecting described profile control envelope in injection well according to described injection rate.
Concrete, it is 100 to 200 mesh granularities that described profile control envelope alters the granular size of the iron powder that agent injection unit injects.
Further, the profile control in described oil exploitation seals the device altered, and also includes:
Air injection unit, for injecting air in described injection well；
Gas injection pressure detector unit, alters the gas injection pressure of the gas entry profile before agent for detecting injection profile envelope.
Further, the profile control in described oil exploitation seals the device altered, and also includes determining unit；
Described gas injection pressure detector unit, is additionally operable to detect injection profile envelope and alters the gas injection pressure of the gas entry profile after agent
Power；
Described determine unit, for altering gas injection pressure and the injection of the gas entry profile before agent according to described injection profile envelope
Profile control envelope alters the gas injection pressure of the gas entry profile after agent, determines whether the gas injection pressure injecting well increases.
Further, the profile control in described oil exploitation seals the device altered, and also includes:
Judging unit, the most equal for judging the air-breathing distribution injecting well near wellbore zone that injection profile seals after altering agent
Even.
Additionally, described gas entry profile parameter includes core intersection, the pressure of inspiration(Pi) of gas entry profile, live wire leading edge locus and note
Enter the inclination angle on the distance of well shaft, described live wire leading edge and stratum；Described formation parameter includes formation porosity；
Described profile control envelope is altered agent injection rate and is determined unit, specifically for:
Monitor live wire leading edge locus according to microseism or time lapse seismic and inject the distance of well shaft and described live wire
Leading edge and the inclination angle on stratum；
Described determine unit, be additionally operable to determining that the gas injection pressure injecting well increases, and profile control envelope is altered agent injection rate and determined
When tilt threshold is preset more than one in the inclination angle on the described live wire leading edge that unit monitors and stratum, determine that profile control envelope is altered successfully.
Concrete, described profile control envelope alter agent injection rate determine unit for:
Determine that described profile control envelope alters the injection rate of agent according to equation below:
Wherein, Q is the injection rate that described profile control envelope alters agent；
The span of A is 1/3 to 1/2；
R is described live wire leading edge locus and the distance injecting well shaft；
H is described core intersection；
Φ is formation porosity；
θ is the inclination angle of described live wire leading edge and stratum.
It addition, described profile control envelope alters agent injection unit, specifically for:
In described injection well, preset injection rate injection described profile control envelope with one with slug formula injection mode and alter agent.
Further, cut open envelope described in and alter a length of 0.5 to 1 meter of the injection of the slug formula injection mode in agent injection unit；
Injection interval time of described slug formula injection mode is 6 to 8 hours；Described default injection rate is 80 to 100g/Nm3。
Profile control in the oil exploitation that the embodiment of the present invention provides seals the method and device altered, and carries out combustion in situ igniting behaviour
Make, obtain gas entry profile parameter and the formation parameter of combustion in situ, and determine according to described gas entry profile parameter and formation parameter
Profile control envelope alters the injection rate of agent；It is iron powder that described profile control envelope alters agent；In injection well, described profile control is injected according to described injection rate
Envelope alters agent.So, after combustion in situ is lighted a fire, reinject profile control envelope and alter agent, it is possible to avoid the problem that the duration of ignition is long, and logical
Crossing the profile control envelope injected, to alter agent be iron powder, profile control envelope is altered agent and is difficult to by high temperature, it is to avoid formation has channeling passage, oil production rate
The problem declined to a great extent.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, also may be used
To obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is that live wire of the prior art advances generalized section；
The flow chart one of the method that the profile control envelope in a kind of oil exploitation that Fig. 2 provides for the embodiment of the present invention is altered；
The flowchart 2 of the method that the profile control envelope in a kind of oil exploitation that Fig. 3 provides for the embodiment of the present invention is altered；
Fig. 4 is that the live wire in the embodiment of the present invention advances generalized section；
The structural representation one of the device that the profile control envelope in a kind of oil exploitation that Fig. 5 provides for the embodiment of the present invention is altered；
The structural representation two of the device that the profile control envelope in a kind of oil exploitation that Fig. 6 provides for the embodiment of the present invention is altered.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
As in figure 2 it is shown, the profile control in a kind of oil exploitation of embodiment of the present invention offer seals the method altered, including:
Step 101, carry out combustion in situ ignition operation.
Step 102, the gas entry profile parameter obtaining combustion in situ and formation parameter, and according to gas entry profile parameter and stratum
Parameter determination profile control envelope alters the injection rate of agent.
Wherein, what deserves to be explained is that above-mentioned profile control envelope alters agent is iron powder.
Injection rate determined by step 103, basis alters agent to injecting injection profile envelope in well.
Profile control in the oil exploitation that the embodiment of the present invention provides seals the method altered, and has carried out combustion in situ ignition operation,
Obtain gas entry profile parameter and the formation parameter of combustion in situ, and determine that profile control envelope is altered according to gas entry profile parameter and formation parameter
The injection rate of agent；It is iron powder that profile control envelope alters agent；Agent is altered to injecting injection profile envelope in well according to injection rate.So, oil is being burnt
Reinject profile control envelope after layer igniting and alter agent, it is possible to avoid the problem that the duration of ignition is long, and alter agent by the profile control envelope injected and be
Iron powder, profile control envelope alters agent and is difficult to by high temperature, it is to avoid formation has channeling passage, the problem that oil production rate declines to a great extent.
Concrete, above-mentioned profile control envelope alters agent, i.e. the granular size of iron powder is 100 to 200 mesh granularities.
It is better understood from the present invention for the ease of those skilled in the art, a more specifically embodiment is set forth below,
As it is shown on figure 3, the profile control in a kind of oil exploitation of embodiment of the present invention offer seals the method altered, including:
Step 201, carry out combustion in situ ignition operation.
Step 202, well injects air to injecting, and detect injection profile envelope and alter the gas injection of the gas entry profile before agent
Pressure.
Step 203, the gas entry profile parameter obtaining combustion in situ and formation parameter.
Above-mentioned gas entry profile parameter includes core intersection, the pressure of inspiration(Pi) of gas entry profile, live wire leading edge locus and injection
The inclination angle on the distance of well shaft, live wire leading edge and stratum；This formation parameter includes formation porosity.
Wherein, the gas entry profile parameter and the formation parameter that obtain combustion in situ may include that according to microseism or four-dimensional ground
Shake monitors the inclination angle of live wire leading edge locus and the distance injecting well shaft and live wire leading edge and stratum.
Step 204, determine that according to gas entry profile parameter and formation parameter profile control envelope alters the injection rate of agent.
Can be specifically to determine that profile control envelope alters the injection rate of agent according to equation below:
Wherein, Q is the injection rate that profile control envelope alters agent.
The span of A is 1/3 to 1/2.
R is live wire leading edge locus (such as live wire 14) and the distance (as shown in Figure 4) injecting well shaft 16.
H is core intersection (as shown in Figure 4).
Φ is formation porosity.
θ is the inclination angle (as shown in Figure 4) of live wire leading edge and stratum.
Step 205, to injecting with slug formula injection mode well presets injection rate injection profile envelope with one alter agent.
A length of 0.5 to 1 meter of the injection of above-mentioned slug formula injection mode, the injection interval time of slug formula injection mode
It it is 6 to 8 hours.It addition, above-mentioned default injection rate is 80 to 100g/Nm3。
Concrete slug formula injection mode is, often alters agent (at this to the profile control envelope injecting injection length 0.5 to 1 meter in well
Embodiment is iron powder), i.e. to injecting in well the air reinjecting 6 to 8 hours, due to current inject well and producing well away from
From generally 100 to 200 meters, total distance that therefore injection profile envelope can alter agent and injection air is set in advance as 30 to 50
Rice.
According to the chemical property of iron powder, iron powder self-ignition point temperature is 316 DEG C, and burning can release substantial amounts of heat, but reaches one
Fixed concentration (i.e. 140g/Nm3Left and right) then can explode, so being the safety ensureing pit shaft, the injection rate of iron powder must be controlled
System is within its concentration explosive limit, and use injection rate is 80～100g/Nm the most herein3。
And using above-mentioned slug formula injection mode, the speed being because iron powder entrance strata deformation can be by certain shadow
Ring, so so that combustion heat release Quick Extended is to leading edge, avoiding again causing stratum combustion explosion, so using slug formula note
The mode entered.
Step 206, detection injection profile envelope alter the gas injection pressure of the gas entry profile after agent.
Step 207, alter agent according to injection profile envelope before the gas injection pressure of gas entry profile and injection profile envelope alter agent it
After the gas injection pressure of gas entry profile, determine whether the gas injection pressure injecting well increases.
Step 208 is if it is determined that the gas injection pressure injecting well increases, and the inclination angle on live wire leading edge and stratum is default more than one inclines
Angle threshold value, it is determined that profile control envelope is altered successfully.
Further, it is also possible to after injection profile envelope alters agent, it is judged that the air-breathing distribution injecting well near wellbore zone is the most uniform,
Detect profile control and seal the effect altered.
For the effect of the clearer description present invention, as shown in Figure 4, a kind of oil exploitation using the present invention is described
In the live wire of method altered of profile control envelope advance effect schematic diagram, as can be seen from Figure 4:
Advance with ignition line, i.e. become live wire position 14 from live wire position 13 and become live wire position 15, live wire and stratum again
Inclination angle be gradually increased, when live wire position arrives 14, this inclination angle is about 45 °, when reaching live wire position and arriving 15, this inclination angle
More than 50 °.Due to being gradually increased of inclination angle, slow down the onlap of air, thus extend the break through of air, it is to avoid
Formation has channeling passage.Concrete reason is because, and it is ferroso-ferric oxide (ferroso-ferric oxide that profile control envelope alters the combustion product of agent iron powder
Melting temperature more than 1594 DEG C, ferroso-ferric oxide density 5.18g/cm3, and density 7.19g/cm of ferrum3), so at live wire
On easily form solid, and stay in macropore, thus slow down the onlap of air.
The method altered is sealed, as it is shown in figure 5, the present invention is real corresponding to the profile control in the oil exploitation shown in above-mentioned Fig. 2 and Fig. 3
Execute the profile control in a kind of oil exploitation that example provides and seal the device altered, including:
Ignition operation unit 31, can carry out combustion in situ ignition operation.
Profile control envelope is altered agent injection rate and is determined unit 32, can obtain gas entry profile parameter and the formation parameter of combustion in situ,
And determine that profile control envelope alters the injection rate of agent according to gas entry profile parameter and formation parameter.
Wherein, this profile control envelope alters agent is iron powder.
Profile control envelope alters agent injection unit 33, can according to determined by injection rate alter agent to injecting injection profile envelope in well.
Concrete, it is 100 to 200 mesh granularities that this profile control envelope alters the granular size of the iron powder that agent injection unit 32 injects.
Further, as shown in Figure 6, the profile control in this oil exploitation seals the device altered, it is also possible to including:
Air injection unit 34, can inject air to injecting in well.
Gas injection pressure detector unit 35, can detect injection profile envelope and alter the gas injection pressure of the gas entry profile before agent.
Further, as shown in Figure 6, the profile control in this oil exploitation seals the device altered, it is also possible to include that one determines unit
36。
Gas injection pressure detector unit 35, it is also possible to detection injection profile envelope alters the gas injection pressure of the gas entry profile after agent.
Determine unit 36, gas injection pressure and the injection profile envelope altering the gas entry profile before agent can be sealed according to injection profile
Alter the gas injection pressure of gas entry profile after agent, determine whether the gas injection pressure injecting well increases.
Further, as shown in Figure 6, the profile control in this oil exploitation seals the device altered, and also includes:
Judging unit 37, it can be determined that the air-breathing distribution injecting well near wellbore zone after injection profile envelope alters agent is the most equal
Even.
Above-mentioned gas entry profile parameter can include core intersection, the pressure of inspiration(Pi) of gas entry profile, live wire leading edge locus and note
Enter the inclination angle on the distance of well shaft, live wire leading edge and stratum；Above-mentioned formation parameter can include formation porosity.
Profile control envelope is altered agent injection rate and is determined unit 32, specifically can monitor live wire leading edge according to microseism or time lapse seismic
Position and the inclination angle injecting the distance of well shaft and live wire leading edge and stratum.
Determine unit 36, it is also possible to determining that the gas injection pressure injecting well increases, and profile control envelope is altered agent injection rate and determined list
When tilt threshold is preset more than one in the inclination angle on the first 32 live wire leading edges monitored and stratum, determine that profile control envelope is altered successfully.
Concrete, profile control envelope is altered agent injection rate and is determined and equation below can be used to determine by unit 32 profile control envelope alters the injection of agent
Amount:
Wherein, Q is the injection rate that profile control envelope alters agent.
The span of A is 1/3 to 1/2.
R is live wire leading edge locus and the distance injecting well shaft.
H is core intersection.
Φ is formation porosity.
θ is the inclination angle of live wire leading edge and stratum.
It addition, profile control envelope alters agent injection unit 33, can be with slug formula injection mode to injecting in well with a default injection
Speed injection profile envelope alters agent.
Further, cut open envelope and alter a length of 0.5 to 1 meter of the injection of the slug formula injection mode in agent injection unit 33；Section
Injection interval time of plug injection mode is 6 to 8 hours；Default injection rate is 80 to 100g/Nm3。
Profile control in the oil exploitation that the embodiment of the present invention provides seals the device altered, and has carried out combustion in situ ignition operation,
Obtain gas entry profile parameter and the formation parameter of combustion in situ, and determine that profile control envelope is altered according to gas entry profile parameter and formation parameter
The injection rate of agent；It is iron powder that profile control envelope alters agent；Agent is altered to injecting injection profile envelope in well according to injection rate.So, oil is being burnt
Reinject profile control envelope after layer igniting and alter agent, it is possible to avoid the problem that the duration of ignition is long, and alter agent by the profile control envelope injected and be
Iron powder, profile control envelope alters agent and is difficult to by high temperature, it is to avoid formation has channeling passage, the problem that oil production rate declines to a great extent.
The present invention applies specific embodiment principle and the embodiment of the present invention are set forth, above example
Explanation be only intended to help to understand method and the core concept thereof of the present invention；Simultaneously for one of ordinary skill in the art,
According to the thought of the present invention, the most all will change, in sum, in this specification
Hold and should not be construed as limitation of the present invention.
Claims (18)
1. the profile control in an oil exploitation seals the method altered, it is characterised in that including:
Carry out combustion in situ ignition operation；
Obtain gas entry profile parameter and the formation parameter of combustion in situ, and determine according to described gas entry profile parameter and formation parameter
Profile control envelope alters the injection rate of agent；It is iron powder that described profile control envelope alters agent；
In injection well, inject described profile control envelope according to described injection rate and alter agent.
Profile control in oil exploitation the most according to claim 1 seals the method altered, it is characterised in that the granule of described iron powder
Size is 100 to 200 mesh granularities.
Profile control in oil exploitation the most according to claim 2 seals the method altered, it is characterised in that carrying out combustion in situ
After ignition operation, also include:
In described injection well, inject air, and detect injection profile envelope and alter the gas injection pressure of gas entry profile before agent.
Profile control in oil exploitation the most according to claim 3 seals the method altered, it is characterised in that according to described injection
Measuring injects after described profile control envelope alters agent to injecting in well, including:
Detection injection profile envelope alters the gas injection pressure of the gas entry profile after agent；
Gas injection pressure and the injection profile envelope of the gas entry profile before altering agent according to described injection profile envelope alter the air-breathing after agent
The gas injection pressure of section, determines whether the gas injection pressure injecting well increases.
Profile control in oil exploitation the most according to claim 4 seals the method altered, it is characterised in that according to described injection
Measuring injects after described profile control envelope alters agent to injecting in well, also includes:
Judge that the air-breathing distribution injecting well near wellbore zone that injection profile seals after altering agent is the most uniform.
Profile control in oil exploitation the most according to claim 5 seals the method altered, it is characterised in that described gas entry profile is joined
Number includes core intersection, the pressure of inspiration(Pi) of gas entry profile, live wire leading edge locus and injects the distance of well shaft, described live wire leading edge
Inclination angle with stratum；Described formation parameter includes formation porosity；
The gas entry profile parameter of described acquisition combustion in situ and formation parameter, including:
Monitor live wire leading edge locus according to microseism or time lapse seismic and inject the distance of well shaft and described live wire leading edge
Inclination angle with stratum；
Profile control in described oil exploitation seals the method altered, and also includes:
If it is determined that the gas injection pressure injecting well increases, and tilt threshold is preset more than one in the inclination angle on described live wire leading edge and stratum,
Then determine that profile control envelope is altered successfully.
Profile control in oil exploitation the most according to claim 6 seals the method altered, it is characterised in that described according to described suction
Gas sectional parameter and formation parameter determine that profile control envelope alters the injection rate of agent, including:
Determine that described profile control envelope alters the injection rate of agent according to equation below:
Wherein, Q is the injection rate that described profile control envelope alters agent；
The span of A is 1/3 to 1/2；
R is described live wire leading edge locus and the distance injecting well shaft；
H is described core intersection；
Φ is formation porosity；
θ is the inclination angle of described live wire leading edge and stratum.
Profile control in oil exploitation the most according to claim 7 seals the method altered, it is characterised in that described according to described note
Enter amount and inject described profile control envelope and alter agent to injecting in well, including:
In described injection well, preset injection rate injection described profile control envelope with one with slug formula injection mode and alter agent.
Profile control in oil exploitation the most according to claim 8 seals the method altered, it is characterised in that described slug formula is injected
A length of 0.5 to 1 meter of the injection of mode；Injection interval time of described slug formula injection mode is 6 to 8 hours；Described default
Injection rate is 80 to 100g/Nm3。
10. the profile control in an oil exploitation seals the device altered, it is characterised in that including:
Ignition operation unit, is used for carrying out combustion in situ ignition operation；
Profile control envelope is altered agent injection rate and is determined unit, for obtaining gas entry profile parameter and the formation parameter of combustion in situ, and according to
Described gas entry profile parameter and formation parameter determine that profile control envelope alters the injection rate of agent；It is iron powder that described profile control envelope alters agent；
Profile control envelope alters agent injection unit, alters agent for injecting described profile control envelope in injection well according to described injection rate.
Profile control in 11. oil exploitations according to claim 10 seals the device altered, it is characterised in that described profile control envelope is altered
The granular size of the iron powder that agent injection unit injects is 100 to 200 mesh granularities.
Profile control in 12. oil exploitations according to claim 11 seals the device altered, it is characterised in that also include:
Air injection unit, for injecting air in described injection well；
Gas injection pressure detector unit, alters the gas injection pressure of the gas entry profile before agent for detecting injection profile envelope.
Profile control in 13. oil exploitations according to claim 12 seals the device altered, it is characterised in that also include determining
Unit；
Described gas injection pressure detector unit, is additionally operable to detect injection profile envelope and alters the gas injection pressure of the gas entry profile after agent；
Described determine unit, for altering gas injection pressure and the injection profile of the gas entry profile before agent according to described injection profile envelope
Envelope alters the gas injection pressure of the gas entry profile after agent, determines whether the gas injection pressure injecting well increases.
Profile control in 14. oil exploitations according to claim 13 seals the device altered, it is characterised in that also include:
Judging unit, the most uniform for judging the air-breathing distribution injecting well near wellbore zone that injection profile seals after altering agent.
Profile control in 15. oil exploitations according to claim 14 seals the device altered, it is characterised in that described gas entry profile
Parameter includes core intersection, the pressure of inspiration(Pi) of gas entry profile, live wire leading edge locus and injects the distance of well shaft, before described live wire
Edge and the inclination angle on stratum；Described formation parameter includes formation porosity；
Described profile control envelope is altered agent injection rate and is determined unit, specifically for:
Monitor live wire leading edge locus according to microseism or time lapse seismic and inject the distance of well shaft and described live wire leading edge
Inclination angle with stratum；
Described determine unit, be additionally operable to determining that the gas injection pressure injecting well increases, and profile control envelope is altered agent injection rate and determined unit
When tilt threshold is preset more than one in the inclination angle on the described live wire leading edge monitored and stratum, determine that profile control envelope is altered successfully.
Profile control in 16. oil exploitations according to claim 15 seals the device altered, it is characterised in that described profile control envelope is altered
Agent injection rate determines unit, specifically for:
Determine that described profile control envelope alters the injection rate of agent according to equation below:
Wherein, Q is the injection rate that described profile control envelope alters agent；
The span of A is 1/3 to 1/2；
R is described live wire leading edge locus and the distance injecting well shaft；
H is described core intersection；
Φ is formation porosity；
θ is the inclination angle of described live wire leading edge and stratum.
Profile control in 17. oil exploitations according to claim 16 seals the device altered, it is characterised in that described profile control seals
Alter agent injection unit, specifically for:
In described injection well, preset injection rate injection described profile control envelope with one with slug formula injection mode and alter agent.
Profile control in 18. oil exploitations according to claim 17 seals the device altered, it is characterised in that described in cut open envelope and alter agent
A length of 0.5 to 1 meter of the injection of the slug formula injection mode in injection unit；When the injection of described slug formula injection mode is spaced
Between be 6 to 8 hours；Described default injection rate is 80 to 100g/Nm3。
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| CN105239982B (en) * | 2015-09-22 | 2017-10-17 | 中国石油天然气股份有限公司 | The method and apparatus of air requirements amount during a kind of determination combustion in situ |
| CN105243200B (en) * | 2015-09-22 | 2018-06-12 | 中国石油天然气股份有限公司 | The method and apparatus of fuel consumption during a kind of determining combustion in situ |
| CN106168128B (en) * | 2016-07-08 | 2018-09-04 | 中国石油天然气股份有限公司 | Determine the method and device of pressure break igniting oil reservoir |
| CN107882531B (en) * | 2017-12-01 | 2020-10-09 | 中国石油天然气股份有限公司 | Selective water control channeling sealing method for flooding production well of water-flooded oil reservoir |
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