CN106194139A - The ignition method of combustion in situ - Google Patents

The ignition method of combustion in situ Download PDF

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Publication number
CN106194139A
CN106194139A CN201610537229.8A CN201610537229A CN106194139A CN 106194139 A CN106194139 A CN 106194139A CN 201610537229 A CN201610537229 A CN 201610537229A CN 106194139 A CN106194139 A CN 106194139A
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Prior art keywords
oil reservoir
target oil
igniting target
igniting
combustion
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CN201610537229.8A
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CN106194139B (en
Inventor
于晓聪
王文涛
胡胜勇
杨宝春
卢丽丝
吴建华
于子童
方梁锋
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China Petroleum and Natural Gas Co Ltd
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China Petroleum and Natural Gas Co Ltd
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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
    • 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
    • E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets

Abstract

The present invention provides the ignition method of a kind of combustion in situ, includes the steps of determining that igniting target oil reservoir.In the given time, in igniting target oil reservoir, inject air by injecting well, so that igniting target oil reservoir has enough oxygen support burnings.Hydraulic ejector is utilized in igniting target oil reservoir bottom, the sleeve pipe injecting well to be sprayed, to form through hole on sleeve pipe.After the through hole of sleeve pipe runs through, utilize hydraulic ejector to pass the through hole on sleeve pipe, is holed in igniting target oil reservoir bottom.After igniting target oil reservoir bottom completes boring, is lighted a fire in igniting target oil reservoir bottom, so that the hot exhaust gas produced after Dian Huo gradually creeps up to whole igniting target oil reservoir, and then make target oil reservoir burning of lighting a fire.Utilize combustion in situ of the present invention ignition method can in heterogeneous oil reservoir successful ignition, carry out fireflood viscous crude, compare more traditional ignition method and be more easy to light non-homogeneous pay.

Description

The ignition method of combustion in situ
Technical field
The present invention relates to technical field of petroleum extraction, be specifically related to the ignition method of a kind of combustion in situ.
Background technology
In combustion in situ, it is the most successful that ignition method generally can affect combustion in situ.Combustion in situ igniting side at present Method mainly has two kinds.The first chemical point pyrogenic process, after first can preheating oil reservoir by high-temperature steam, recycling chemical reagent makes Oil reservoir is promoted to rapidly the self-ignition point of crude oil, finally makes oil reservoir burn.The second steam injection self-ignition point pyrogenic process, steam to be passed through After preheating oil reservoir, persistently inject air, utilize air oxidation crude oil heat release, step up the temperature of oil reservoir, light oil reservoir.These are two years old Plant sparking mode and all have the example of successful Application at Oil production sites.
It is well known that the plane of oil reservoir is not entirely uniform dielectric layer, if the thin place of the oil-containing in oil reservoir Light a fire, owing to the thin place of the oil-containing in oil reservoir has the obstruction of rock etc., can cause combustion in situ igniting unsuccessful or Live wire after igniting can not be pushed ahead well, and then causes the recovery ratio of crude oil on the low side, has a strong impact on production.
Summary of the invention
The present invention provides the ignition method of a kind of combustion in situ, and the ignition method utilizing combustion in situ of the present invention can be non- Successful ignition in the oil reservoir of homogenizing, carries out fireflood viscous crude, compares more traditional ignition method and is more easy to light non-homogeneous pay.
The above-mentioned purpose of the present invention can use following technical proposal to realize:
The present invention provides the ignition method of a kind of combustion in situ, comprises the steps:
Determine igniting target oil reservoir；
In the given time, in described igniting target oil reservoir, inject air by injecting well, so that described igniting mesh Mark oil reservoir has enough oxygen support burnings；
Hydraulic ejector is utilized the sleeve pipe of described injection well to be sprayed, with in institute in described igniting target oil reservoir bottom State formation through hole on sleeve pipe；
After the through hole of described sleeve pipe runs through, hydraulic ejector is utilized to pass the through hole on described sleeve pipe, to described igniting Hole in target oil reservoir bottom；
After described igniting target oil reservoir bottom completes boring, is lighted a fire in described igniting target oil reservoir bottom, with The hot exhaust gas produced after making igniting gradually creeps up to whole igniting target oil reservoir, and then makes described igniting target oil reservoir Burning.
In one embodiment, determine that igniting target oil reservoir includes:
Obtain the actual percent inspiration of each oil reservoir in oil reservoir；
Obtain the theoretical percent inspiration of described each oil reservoir；
Ask for the actual percent inspiration of described each oil reservoir and the exhausted of the difference of the theoretical percent inspiration of described each oil reservoir To value；
The absolute value of described difference is obtained ratio compared with the actual percent inspiration of described each oil reservoir；
When described ratio is less than 50%, and when the thickness of oil reservoir is more than 1 meter, then judge that described oil reservoir is as igniting target oil Layer.
In one embodiment, described igniting target oil reservoir bottom is carried out boring to include:
When being less than or equal to 0.5 meter apart from described injection well, utilize described hydraulic ejector to described igniting target oil reservoir Bottom injection water is holed；
It is more than 0.5 meter apart from described injection well, and when described injection well is less than or equal to 5 meters, utilizes described waterpower Ejector is holed to described igniting target oil reservoir bottom injection chemistry combustion adjuvant；
When being more than 5 meters apart from described injection well, described hydraulic ejector is utilized to spray to described igniting target oil reservoir bottom Jetting is holed.
In one embodiment, described chemistry combustion adjuvant includes: diesel oil, potassium permanganate and thiourea, wherein diesel oil Content accounts for 98%.
In one embodiment, the emitted dose of described chemistry combustion adjuvant is:
Q=π [(0.5+x)2-0.52]hΦ；
Wherein, the span of x is 0.2m-0.4m, x and the oil saturation of oil reservoir is inversely proportional to；It is thick that h is expressed as oil reservoir Degree, unit: m；Φ represents the porosity of oil reservoir.
In one embodiment, inject well described in the hole spacing in described igniting target oil reservoir bottom to be less than or equal to When 0.5 meter, and when injecting well more than 5 meters described in the hole spacing in described igniting target oil reservoir bottom, the injection of described water Amount is: Q=lq/v；
Wherein, Q represents the emitted dose of water, unit: L；L represents that inject well bores the distance of oil reservoir, unit: m to needs spray；q Represent the injection discharge capacity of hydraulic ejector, unit: L/s；V represents the translational speed of spray drill bit, unit: m/s.
In one embodiment, described injection well and the distance between the producing well recovered the oil are 70-140 rice, right Time boring in described igniting target oil reservoir bottom, the hole spacing of described igniting target oil reservoir bottom accounts for described injection well and institute State producing well spacing 2/3.
In one embodiment, the step lighted a fire described igniting target oil reservoir bottom includes:
Described inject into well under enter electric igniter, so that the temperature of described igniting target oil reservoir bottom reaches 350 DEG C； And inject into well persistently injection air 400-500Nm to described3/ (m d), thus is ignited in described igniting target oil reservoir bottom.
In one embodiment, described igniting target oil reservoir bottom is positioned at described igniting target oil reservoir 1/ from bottom to top At 3-1/4.
In one embodiment, the described scheduled time is 7-15 days.
In sum, the present invention utilizes hydraulic ejector to hole igniting target oil reservoir bottom before ignition, shape Become an ignition channel making live wire to push ahead, then light a fire in igniting target oil reservoir bottom, produce after making igniting Raw hot exhaust gas gradually creeps up to whole igniting target oil reservoir, and then whole igniting target oil reservoir is burnt.The present invention Method is simple, it is easy to implement, and the recovery ratio of viscous crude is high.
Accompanying drawing explanation
Accompanying drawing described here is only used for task of explanation, and is not intended to limit model disclosed by the invention by any way Enclose.It addition, the shape of each parts in figure and proportional sizes etc. are only schematically, it is adapted to assist in the understanding of the present invention, and It not shape and the proportional sizes specifically limiting each parts of the present invention.Those skilled in the art under the teachings of the present invention, can To select various possible shape and proportional sizes to implement the present invention as the case may be.
Fig. 1 shows the flow chart of the ignition method of combustion in situ of the present invention.
Detailed description of the invention
In conjunction with accompanying drawing and the description of the specific embodiment of the invention, it is possible to clearly understand the details of the present invention.But It is, the detailed description of the invention of invention described herein to be only used for explaining the purpose of the present invention, and can not understand by any way One-tenth is limitation of the present invention.Under the teachings of the present invention, technical staff is it is contemplated that the most possible change of based on the present invention Shape, these are regarded as belonging to the scope of the present invention.
As it is shown in figure 1, the invention provides the ignition method of a kind of combustion in situ, comprise the steps:
S1: determine igniting target oil reservoir.
S2: in the given time, injects air by injecting well in described igniting target oil reservoir, so that described igniting Target oil reservoir has enough oxygen support burnings.
S3: utilize hydraulic ejector in described igniting target oil reservoir bottom, the sleeve pipe of described injection well to be sprayed, with Described sleeve pipe is formed through hole.
S4: after the through hole of described sleeve pipe runs through, utilizes hydraulic ejector to pass the through hole on described sleeve pipe, to described point Hole in fire target oil reservoir bottom.
S5: after described igniting target oil reservoir bottom completes boring, is lighted a fire in described igniting target oil reservoir bottom, So that the hot exhaust gas produced after Dian Huo gradually creeps up to whole igniting target oil reservoir, and then make described igniting target oil Grate firing burns.
In the present embodiment, determine that igniting target oil reservoir includes: obtain the actual percent inspiration of each oil reservoir in oil reservoir； Obtain the theoretical percent inspiration of described each oil reservoir；Ask for the actual percent inspiration of described each oil reservoir and the reason of described each oil reservoir The absolute value of the difference of opinion percent inspiration；By the absolute value of described difference compared with the actual percent inspiration of described each oil reservoir Obtain ratio；When described ratio is less than 50%, and when the thickness of oil reservoir is more than 1 meter, then judge that described oil reservoir is as igniting target oil Layer.
In a specific embodiment, the actual percent inspiration of each oil reservoir is actual inspiration capacity and the note of each oil reservoir Enter the ratio of total gas injection rate of well.Wherein, total gas injection rate of the actual inspiration capacity of each oil reservoir and injection well is all according to Oil Generation Produce on-the-spot actually measured.
In a specific embodiment, the theoretical percent inspiration of described each oil reservoir can be entered according to below equation Row calculates:
θ i = ( y 1 i + ∂ y 1 i ) ( y 2 i + ∂ y 2 i ) ... ( y n i + ∂ y n i ) Σ i = 1 m ( y 1 i + ∂ y 1 i ) ( y 2 i + ∂ y 2 i ) ... ( y n i + ∂ y n i ) ;
Wherein, θiRepresent the theoretical percent inspiration of i-th oil reservoir；M represents oil reservoir number；y1iRepresent i-th oil reservoir 1st reservoir parameter；y2iRepresent the 2nd reservoir parameter of i-th oil reservoir；yniIt is expressed as the n-th oil reservoir ginseng of i-th oil reservoir Number；Represent the weight correction value of the 1st reservoir parameter of i-th oil reservoir；Represent the 2nd oil reservoir ginseng of i-th oil reservoir The weight correction value of number；It is expressed as the weight correction value of the n-th reservoir parameter of i-th oil reservoir.
Wherein, described weight correction value can calculate according to below equation:
∂ y j i = ( y j i - y j i ‾ ) ( a j - 1 n ) × n ;
Wherein,Represent the weight correction value of the jth reservoir parameter of i-th oil reservoir；yjiRepresent the jth of i-th oil reservoir Individual reservoir parameter, i takes the positive integer in 1 to m, and j takes the positive integer in 1 to n；N represents the number of reservoir parameter,Represent i-th The meansigma methods of the jth reservoir parameter of individual oil reservoir, ajRepresent the weight of jth reservoir parameter.Such as, described reservoir parameter is individual Number is if 4, then n=4, the number of concrete reservoir parameter can the most rationally determine, at this not Make any restriction.
Wherein, the weight of reservoir parameter can be asked for according to following equation:
(1) target sequence (the actual inspiration capacity of oil reservoir) and analytical sequence (reservoir parameter of each oil reservoir in oil reservoir) are chosen:
y → 0 = ( y 0 ( 1 ) , y 0 ( 2 ) , ... , y 0 ( m ) ) ; y → 1 = ( y 1 ( 1 ) , y 1 ( 2 ) , ... , y 1 ( m ) ) ; ...... y → j = ( y j ( 1 ) , y j ( 2 ) , ... , y j ( m ) ) ;
In formula,It is expressed as target sequence；It is expressed as comparative sequences；M is expressed as sequence length；J value is in 1 to n Positive integer, n is expressed as the number of comparative sequences.
(2) according to formulaThe target sequence chosen and analytical sequence are made at nondimensionalization Reason；Wherein, xbK () is expressed as ybThe nondimensionalization numerical value of (k)；ybK () is expressed as in step 1Interior any number；B value It it is the positive integer in 0 to 4.
(3) according to formulaTry to achieve coefficient ξ0j(k).Wherein, Δj (k)=| x0(k)-xj(k)|；x0K () represents the actual inspiration capacity of nondimensional oil reservoir；xjK () represents nondimensional reservoir parameter j；Represent each data point ΔjThe minima of the absolute value of the difference of (k)；Represent each number Strong point ΔjThe maximum of the absolute value of the difference of (k)；ρ is expressed as resolution ratio, ρ ∈ (0,1).
(4) according to formulaTry to achieve association numerical value r0j.Wherein, the positive integer during j value is 1 to 4.
(5) the association numerical value r that will try to achieve0jMake normalized, weight a of reservoir parameter can be obtainedj。
In the present embodiment, after igniting target oil reservoir determines, first will in the given time, by injecting well to described Igniting target oil reservoir injects air, so that described igniting target oil reservoir has enough oxygen support burnings.This makes a reservation for Time can be 7-15 days.Then, the hydraulic ejector sleeve pipe in described igniting target oil reservoir bottom to described injection well is utilized Spray, to form through hole on described sleeve pipe.
After the through hole of described sleeve pipe runs through, hydraulic ejector is utilized to pass the through hole on described sleeve pipe, to described igniting Hole in target oil reservoir bottom.The purpose carrying out holing in igniting target oil reservoir bottom is to set up ignition channel, lights oil reservoir Initial stage, live wire can push ahead along this ignition channel, gradually the large stretch of oil reservoir of burning.
After described igniting target oil reservoir bottom completes boring, is lighted a fire in described igniting target oil reservoir bottom, with The hot exhaust gas produced after making igniting gradually creeps up to whole igniting target oil reservoir, and then makes described igniting target oil reservoir Burning.Due to Initial Stage after Ignition, live wire is positioned at igniting target oil reservoir bottom, and the oil reservoir of bottom gradually lights, the hot exhaust gas of generation to The top of oil reservoir is spread so that the upper temp of oil reservoir raises, and reaches the burning-point of viscous crude, and then gradually lead fire target oil reservoir Top oil reservoir, finally make whole oil reservoir all blaze up, carry out fireflood viscous crude.
The present invention utilizes hydraulic ejector to hole igniting target oil reservoir bottom before ignition, forms one and makes fire The ignition channel that line can be pushed ahead, then lights a fire in igniting target oil reservoir bottom, the hot exhaust gas produced after making igniting Gradually creep up to whole igniting target oil reservoir, and then whole igniting target oil reservoir is burnt.The inventive method is simple, easily In enforcement, the recovery ratio of viscous crude is high.
In one embodiment, described igniting target oil reservoir bottom is carried out boring to include: apart from described injection well During less than or equal to 0.5 meter, described hydraulic ejector is utilized to hole to described igniting target oil reservoir bottom injection water.Utilize water to Boring protection can inject the pit shaft of well while holing oil reservoir, it is to avoid the pit shaft of injection well damages well because of excessive burning Cylinder.
It is more than 0.5 meter apart from described injection well, and when described injection well is less than or equal to 5 meters, utilizes described waterpower Ejector is holed to described igniting target oil reservoir bottom injection chemistry combustion adjuvant.Utilizing chemistry combustion adjuvant to hole can be right While oil reservoir is holed, reducing the burning-point of viscous crude, making viscous crude is incendivity at relatively low temperature, so can carry The harvest efficiency of high viscous oil.
When being more than 5 meters apart from described injection well, described hydraulic ejector is utilized to spray to described igniting target oil reservoir bottom Jetting is holed.When being more than 5 meters apart from described injection well, the boring to oil reservoir is changed into water, due to 0.5 by chemistry combustion adjuvant Rice to live wire when 5 meters has been formed, and still utilizes chemistry combustion adjuvant to hole and can cause unnecessary waste, therefore, for this Time boring only need to utilize water, water still can drill through live wire passage in oil reservoir so that live wire can continue to push away forward Enter, and then continue to make viscous crude burn.
Described chemistry combustion adjuvant includes: diesel oil, potassium permanganate and thiourea, wherein the content of diesel oil can account for 98%.When So, those skilled in the art can select suitably chemistry combustion adjuvant according to the needs of actual production, and the present invention does not does at this Any restriction.The emitted dose of described chemistry combustion adjuvant can calculate according to oil reservoir voidage, and concrete emitted dose can be: Q=π [(0.5+x)2-0.52]hΦ。
Wherein, the span of x is 0.2m-0.4m, x and the oil saturation of oil reservoir is inversely proportional to；It is thick that h is expressed as oil reservoir Degree, unit: m；Φ represents the porosity of oil reservoir.
In a specific embodiment, inject well described in the hole spacing in described igniting target oil reservoir bottom and be less than During equal to 0.5 meter, and when injecting well more than 5 meters described in the hole spacing in described igniting target oil reservoir bottom, described water Emitted dose is: Q=lq/v.
Wherein, Q represents the emitted dose of water, unit: L；L represents that inject well bores the distance of oil reservoir, unit: m to needs spray；q Represent the injection discharge capacity of hydraulic ejector, unit: L/s；V represents the translational speed of spray drill bit, unit: m/s.
Described injection well and the distance between the producing well recovered the oil are 70-140 rice, under described igniting target oil reservoir When portion holes, the hole spacing of described igniting target oil reservoir bottom accounts for the described injection well spacing with described producing well 2/3.Between injection-production well, the distance of 2/3 has established the live wire of fireflood the most, and live wire can be fully advanced to producing well, the most not The oil reservoir between well and producing well will be injected all hole and just can reach to make the clean-burning purpose of oil reservoir, cost-effective.
The step lighting a fire described igniting target oil reservoir bottom includes:
Described inject into well under enter electric igniter, so that the temperature of described igniting target oil reservoir bottom reaches 350 DEG C； And inject into well persistently injection air 400-500Nm to described3/ (m d), thus described igniting target oil reservoir is ignited.
Specifically, described igniting target oil reservoir bottom is positioned at described igniting target oil reservoir 1/3-1/4 from bottom to top.
Each embodiment in this specification all uses the mode gone forward one by one to describe, what each embodiment stressed is with The difference of other embodiments, between each embodiment, identical similar part sees mutually.
Above-described embodiment, only for technology design and the feature of the explanation present invention, its object is to allow person skilled in the art Scholar will appreciate that present disclosure and implements according to this, can not limit the scope of the invention with this.All according to the present invention The equivalence that spirit is made changes or modifies, and all should contain within protection scope of the present invention.

Claims (10)

1. the ignition method of a combustion in situ, it is characterised in that comprise the steps:
Determine igniting target oil reservoir；
In the given time, in described igniting target oil reservoir, air is injected, so that described igniting target is oily by injection well There is in Ceng enough oxygen support burnings；
Hydraulic ejector is utilized the sleeve pipe of described injection well to be sprayed, with at described set in described igniting target oil reservoir bottom Through hole is formed on pipe；
After the through hole of described sleeve pipe runs through, hydraulic ejector is utilized to pass the through hole on described sleeve pipe, to described igniting target Hole in oil reservoir bottom；
After described igniting target oil reservoir bottom completes boring, is lighted a fire in described igniting target oil reservoir bottom, so that The hot exhaust gas produced after igniting gradually creeps up to whole igniting target oil reservoir, and then described igniting target oil reservoir is fired Burn.
The ignition method of combustion in situ the most according to claim 1, it is characterised in that determine that igniting target oil reservoir includes:
Obtain the actual percent inspiration of each oil reservoir in oil reservoir；
Obtain the theoretical percent inspiration of described each oil reservoir；
Ask for the absolute value of the actual percent inspiration of described each oil reservoir and the difference of the theoretical percent inspiration of described each oil reservoir；
The absolute value of described difference is obtained ratio compared with the actual percent inspiration of described each oil reservoir；
When described ratio is less than 50%, and when the thickness of oil reservoir is more than 1 meter, then judge that described oil reservoir is as igniting target oil reservoir.
The ignition method of combustion in situ the most according to claim 1, it is characterised in that to described igniting target oil reservoir bottom Carry out boring to include:
When being less than or equal to 0.5 meter apart from described injection well, utilize described hydraulic ejector to described igniting target oil reservoir bottom Injection water is holed；
It is more than 0.5 meter apart from described injection well, and when described injection well is less than or equal to 5 meters, utilizes described water-jet Device is holed to described igniting target oil reservoir bottom injection chemistry combustion adjuvant；
When being more than 5 meters apart from described injection well, described hydraulic ejector is utilized to spray water to described igniting target oil reservoir bottom Hole.
The ignition method of combustion in situ the most according to claim 3, it is characterised in that described chemistry combustion adjuvant includes: bavin Oil, potassium permanganate and thiourea, wherein the content of diesel oil accounts for 98%.
The ignition method of combustion in situ the most according to claim 3, it is characterised in that the emitted dose of described chemistry combustion adjuvant For:
Q=π [(0.5+x)2-0.52]hΦ；
Wherein, the span of x is 0.2m-0.4m, x and the oil saturation of oil reservoir is inversely proportional to；H is expressed as core intersection, single Position: m；Φ represents the porosity of oil reservoir.
The ignition method of combustion in situ the most according to claim 3, it is characterised in that in described igniting target oil reservoir bottom Hole spacing described in when injecting well less than or equal to 0.5 meter, and described in the hole spacing in described igniting target oil reservoir bottom When injecting well more than 5 meters, the emitted dose of water is: Q=lq/v；
Wherein, Q represents the emitted dose of water, unit: L；L represents that inject well bores the distance of oil reservoir, unit: m to needs spray；Q represents The injection discharge capacity of hydraulic ejector, unit: L/s；V represents the translational speed of spray drill bit, unit: m/s.
The ignition method of combustion in situ the most according to claim 1, it is characterised in that described injection well with for recover the oil Distance between producing well is 70-140 rice, time boring in described igniting target oil reservoir bottom, and described igniting target oil reservoir The hole spacing of bottom accounts for the 2/3 of the described injection well spacing with described producing well.
The ignition method of combustion in situ the most according to claim 1, it is characterised in that to described igniting target oil reservoir bottom The step carrying out lighting a fire includes:
Described inject into well under enter electric igniter, so that the temperature of described igniting target oil reservoir bottom reaches 350 DEG C；And to Described inject into well persistently injection air 400-500Nm3/ (m d), thus is ignited in described igniting target oil reservoir bottom.
The ignition method of combustion in situ the most according to claim 1, it is characterised in that described igniting target oil reservoir lower portion At described igniting target oil reservoir 1/3-1/4 from bottom to top.
The ignition method of combustion in situ the most according to claim 1, it is characterised in that the described scheduled time is 7-15 days.
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CN106948799A (en) * 2017-02-28 2017-07-14 中国石油天然气股份有限公司 The determination method and device of the oil reservoir duration of ignition
CN107100604A (en) * 2017-03-16 2017-08-29 中国石油天然气股份有限公司 A kind of method for carrying out combustion in situ exploitation of being lighted a fire using nano combustion improver
CN107654221A (en) * 2017-09-08 2018-02-02 中国石油天然气股份有限公司 The method and device of reservoir selective acidizing
CN107654208A (en) * 2017-09-08 2018-02-02 中国石油天然气股份有限公司 Reservoir selectively adjusts stifled method
CN109469467A (en) * 2018-11-13 2019-03-15 中国石油天然气股份有限公司 Oil layer ignition method, apparatus, storage medium and processor

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