CN1789660A - Stimulated ignition method for fire-flooding driven oil well - Google Patents
Stimulated ignition method for fire-flooding driven oil well Download PDFInfo
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- CN1789660A CN1789660A CN 200510130860 CN200510130860A CN1789660A CN 1789660 A CN1789660 A CN 1789660A CN 200510130860 CN200510130860 CN 200510130860 CN 200510130860 A CN200510130860 A CN 200510130860A CN 1789660 A CN1789660 A CN 1789660A
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Abstract
This invention relates to one fire drive oil exploring stimulation fire method in the fire drive technique, wherein, Fire oil layer is different to other method as it uses weight component as fuel continuously and drives the inside layer crude oil out of earth. The invention method is suitable for oil storage exploring. The invention adopts and casts steam at 350 degrees according to oil characteristics and then casts in large amount of air to make the oil layer burst by itself and makes use of weight oil as fuel to get best oil production.
Description
Technical field:
The present invention relates to a kind of stimulated ignition method for fire-flooding driven oil well, belong to oil well fireflood oil drop ignition technique class.
Background technology:
The difference of combustion in situ and other oil production method is that it is to utilize the important matter composition of a part in the oil reservoir to do fuel, and constantly heat is given birth in burning, the crude oil in the oil reservoir is displaced, so it is also referred to as the fire flood method.Fireflood output in the world's is about 5000t/d at present, mainly concentrates on countries such as the U.S., Canada, Romania.External fire flood facts have proved, light oil oil reservoir that fireflood can be crossed from water drive really or a large amount of oil of heavy crude reservoir extraction crossed of steam injection development, and the recovery ratio of successful fireflood reaches 50-80% has also proved this point.Fire flood Xinjiang, triumph and Liaohe Oil Field is at home all carried out, has obtained stand oil stream as the heavy oil block of Liaohe Oil Field dawn 66# well group and five at mausoleum, Ma Jia shop, utilizes fireflood oil crude oil extraction according to statistics, and one ton of oil of every output needs consumed cabin air 3300m
3, the compressor operating of need usefulness 50KW 15 hours, the 308 yuan/t of the electric power conversion oily power cost of ton of consumption; The gas oil ratio about 0.2 of the present steam flooding in Liaohe Oil Field, one ton of oil of steam flooding output needs to consume steam 5m
3, produce 5m
3Steam need consume crude oil 310kg, 620 yuan/t of the oily power cost of ton by present oil price conversion, consuming cost is 2 times of fireflood, therefore use the fireflood technology to have small investment, characteristics simple to operate, with high content of technology, adopt the problem of employing of reserves and improve the ultimate recovery aspect stronger technical support and development space are arranged solving difficulty.
In the existing technology, the key technology of fire flood is sparking mode, at present, various countries generally adopt manual firing's mode of igniter, as using cable heater are sent in the oil well by oil reservoir being heated the acquisition thermal source, adopting liquefied gas and chemical mode that oil reservoir is carried out heat in addition drives, though said method all may be succeedd, for the oil reservoir of viscous crude field, above-mentioned sparking mode success rate is very low.Mainly be when construction ignition difficulties, after oil reservoir ignites, can not control the burning direction fire flood and not have effect should be arranged.
The present invention adopts the steam injection sparking mode can implement the igniting displacement of reservoir oil to heavy oil tested layer for this reason, and the present invention is not reported by retrieval.
Summary of the invention:
The present invention is in order to overcome above-mentioned shortcoming, and a kind of stimulated ignition method for fire-flooding driven oil well that proposes can carry out the igniting of fireflood oil reservoir in the oil well of viscous crude field, can realize the raising of oil well output.
Technical scheme of the present invention:
Be the task of realizing that the present invention proposes, it is at first by steam 300 sides of the single oil reservoir implantation temperature of oil well steam injection pipeline in oil well more than 350 ℃ that oil well involved in the present invention stimulates sparking mode, make its oil reservoir give heat, treat that then interior crude oil of oil well and air produce oxidation heat liberation and do the time spent, inject air again in well, day fluence was injected 6-7 days continuously at the 1-1.2 ten thousand stere, can make oil reservoir reach self-ignition point, burn.
After the described oil reservoir igniting, in time carry out Continuous Observation to the oil reservoir situation of giving vent to anger, and N
2/ CO
2Ratio is measured, and confirms ignition conditions and flame propagation direction and combustion efficiency to distinguish.
Described stimulated ignition method for fire-flooding driven oil well, be suitable for anti-9 method flooding patterns, promptly eight mouthfuls of producing wells are around the oil recovery well spacing method of a bite ignition well, and described igniting oil reservoir is that simple layer is penetrated out thickness between 1-2 rice, and this layer must be positioned at this well bottom.
Described fireflood oil well stimulation point ignition method, the steam injection parameter is 350 ℃ of temperature during igniting, mass dryness fraction: 75%, injection pressure: 3MPa～25MPa.
The present invention compared with prior art has distinguishing feature:
The present invention injects the stimulation sparking mode that high-temperature steam is realized the oil reservoir spontaneous combustion because sparking mode has adopted in the past heavy oil wells, can utilize original annotation vapour device to carry out at the construction field (site), saved great amount of investment undoubtedly, adopt the steam injection sparking mode in addition, rely on the fuel in the oil reservoir that the down-hole heat is provided, once igniting can obtain higher crude output in considerable time.
The specific embodiment:
The present invention is provided by following examples.
Embodiment 1
Before the invention process during selected element gas well, described ignition layer should be chosen in the most next perforation layer position of whole oil well well section, it is suitable at 1-2 rice to penetrate out core intersection, facts have proved and produce gas onlap phenomenon when selecting the bottom individual layer that crude oil is burnt under the condition of high temperature, producing degree of reservoir is improved, increase crude output.
Embodiment 2
It is crucial that igniting injects into well quality of steam, requirement for this reason, and the steam temperature during injection in the well: 350 ℃, mass dryness fraction: 75%, injection pressure: 3MPa～25MPa.Oil reservoir ability spontaneous combustion under high-temperature steam stimulates like this; air is injected in the burning back can guarantee that fireflood is in burning under the cracking high temperature mode; make the crude oil in live wire the place ahead become light oil; and interior irreducible water of oil reservoir and burning generation water carry heat transferred the place ahead after becoming steam, scrub oil reservoir once more and at last crude oil are driven and is advanced in the producing well.
Embodiment 3
After oil reservoir is implemented igniting, in time carry out Continuous Observation to oil reservoir, and carry out N by ground instrument
2/ CO
2Ratio is measured, the N in the oil well
2/ CO
2Ratio be optimal combustion state at 9-12.
Embodiment 4
Fire flood well of the present invention stimulates the used gas filling device of igniting to select 23 tons, 25 tons and the movable boiler of 11-12 ton for use
Steam injection rate: 8-12m
3/ h
Heatproof: 330-380 ℃ of mass dryness fraction 70-75%
Pressure: more than the 17.5MPa
Steam injection pipeline: withstand voltage 18MPa-25MPa.
Claims (4)
1, a kind of stimulated ignition method for fire-flooding driven oil well, it is characterized in that: described ignition method is at first by single oil reservoir injection steam 300 sides 350 ℃ or more of oil well steam injection pipeline in oil well, make its oil reservoir give heat, treat that then interior crude oil of oil well and air produce oxidation heat liberation and do the time spent, in well, inject air again, day fluence was injected 6-7 days continuously at the 1-1.2 ten thousand stere, promptly reached self-ignition point and made the oil reservoir burning.
2, a kind of stimulated ignition method for fire-flooding driven oil well according to claim 1 is characterized in that: after the oil reservoir igniting, and be to give vent to anger situation Continuous Observation and carry out N of oil reservoir
2/ CO
2Ratio is measured, and gives the phase effect to test positive ignition conditions and flame propagation direction and to burn whether to reach.
3, a kind of stimulated ignition method for fire-flooding driven oil well according to claim 1, it is characterized in that: this method is suitable for the heavy oil wells in anti-9 method injection-production wells, promptly eight mouthfuls of producing wells are around a bite ignition well oil recovery well spacing method, the igniting oil reservoir is that individual layer is penetrated out thickness between 1-2 rice, and this layer must be positioned at this well section bottom.
4, a kind of stimulated ignition method for fire-flooding driven oil well according to claim 1, it is characterized in that: the steam injection parameter is during igniting: temperature: 350 ℃, mass dryness fraction: 75%, injection pressure: 3MPa～25MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510130860 CN1789660A (en) | 2005-12-21 | 2005-12-21 | Stimulated ignition method for fire-flooding driven oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510130860 CN1789660A (en) | 2005-12-21 | 2005-12-21 | Stimulated ignition method for fire-flooding driven oil well |
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| Publication Number | Publication Date |
|---|---|
| CN1789660A true CN1789660A (en) | 2006-06-21 |
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| CN 200510130860 Pending CN1789660A (en) | 2005-12-21 | 2005-12-21 | Stimulated ignition method for fire-flooding driven oil well |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798915A (en) * | 2010-04-26 | 2010-08-11 | 胡士清 | Method for improving recovery ratio of thick-layer massive thickened oil by utilizing subsection fireflooding exploitation |
| CN101864938A (en) * | 2010-03-23 | 2010-10-20 | 邓惠荣 | Underground ignition technology of combustion drive oil layer by injecting steam |
| CN102071918A (en) * | 2010-12-22 | 2011-05-25 | 中国石油天然气集团公司 | Thick oil reservoir fire flooding oil extraction combustion-supporting ignition method |
| CN102758603A (en) * | 2012-07-10 | 2012-10-31 | 中国石油天然气股份有限公司 | Super heavy oil reservoir SAGD exploitation later-period air injection exploitation method |
| CN104196507A (en) * | 2014-09-03 | 2014-12-10 | 雷春娣 | Fireflooding huff and puff and fireflooding linkage thickened oil exploitation method |
-
2005
- 2005-12-21 CN CN 200510130860 patent/CN1789660A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101864938A (en) * | 2010-03-23 | 2010-10-20 | 邓惠荣 | Underground ignition technology of combustion drive oil layer by injecting steam |
| CN101864938B (en) * | 2010-03-23 | 2014-04-09 | 邓惠荣 | Underground ignition technology of combustion drive oil layer by injecting steam |
| CN101798915A (en) * | 2010-04-26 | 2010-08-11 | 胡士清 | Method for improving recovery ratio of thick-layer massive thickened oil by utilizing subsection fireflooding exploitation |
| CN101798915B (en) * | 2010-04-26 | 2013-06-05 | 中国石油天然气股份有限公司 | Method for improving recovery ratio of thick-layer massive thickened oil by utilizing segmented fireflood exploitation |
| CN102071918A (en) * | 2010-12-22 | 2011-05-25 | 中国石油天然气集团公司 | Thick oil reservoir fire flooding oil extraction combustion-supporting ignition method |
| CN102758603A (en) * | 2012-07-10 | 2012-10-31 | 中国石油天然气股份有限公司 | Super heavy oil reservoir SAGD exploitation later-period air injection exploitation method |
| CN104196507A (en) * | 2014-09-03 | 2014-12-10 | 雷春娣 | Fireflooding huff and puff and fireflooding linkage thickened oil exploitation method |
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