CN109826604A - A kind of combustion-supporting envelope of fireflood oil reservoir alters method - Google Patents
A kind of combustion-supporting envelope of fireflood oil reservoir alters method Download PDFInfo
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- CN109826604A CN109826604A CN201910017665.6A CN201910017665A CN109826604A CN 109826604 A CN109826604 A CN 109826604A CN 201910017665 A CN201910017665 A CN 201910017665A CN 109826604 A CN109826604 A CN 109826604A
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Abstract
The invention discloses a kind of combustion-supporting envelopes of fireflood oil reservoir to alter method.The combustion-supporting envelope of party's normal direction injection well injection is altered the combustion-supporting envelope of agent progress and is altered；It includes foaming agent and combustion adjuvant that the combustion-supporting envelope, which alters agent,.It is that the combustion-supporting envelope of solution-type alters agent or the combustion-supporting envelope of turbid type alters agent that the further combustion-supporting envelope, which alters agent,；It can be used alone, other profile control agents can also be cooperated to carry out slug construction.Combustion-supporting envelope of the invention alters method suitable for heavy oil block, and aqueous relatively low 90-95%, oil saturation is relatively high, and there is certain deficit near wellbore zone, prepares fireflood but has the injection well of has channeling risk；The present invention, which alters agent by the combustion-supporting envelope of certain technique injection, can make firewire promote uniform and stable, and burning is abundant.
Description
Technical field
The invention belongs to field use fields.Method is altered more particularly to a kind of combustion-supporting envelope of fireflood oil reservoir.
Background technique
Fireflood is exactly using the heavy component in in-place oil as fuel, using air or oxygen rich gas as combustion-supporting
Agent takes the methods of spontaneous combustion and manual firing that reservoir temperature is made to reach crude oil burning point, and is continuously injected into combustion adjuvant, makes Crude Oil
Sustained combustion, combustion reaction generates a large amount of heat, heated oil reservoir, so that reservoir temperature rises to 600~700 DEG C, heavy component
It cracks at high temperature, the gas and water vapour of light oil, burning generation that gas, the heavy oil pyrolysis of injection generate are for driving
Crude oil is flowed to producing well, and is produced from producing well.
It is that air onlap is serious that combustion in situ, which recovers the oil there are a significant deficiency, and top development degree is big, when exploitation enters
Certain degree can cause has channeling, and especially own to develop oil reservoir, has channeling degree is bigger.
Current common ignition process causes fire floor position to employ unevenness, and the oil reservoir for being not suitable for fireflood generates coking waste,
Subsequent developable resource is greatly reduced, the heavy crude reservoir of steam soak exploitation is carried out especially for oneself, coking waste is asked
Topic is particularly acute.
Heavy oil wells envelope alter technical aspect mainly and have the particulate species such as traditional cements blocking agent, high temperature organogel, thermosetting resin,
The types such as gel particle blocking agent, foam class water shutoff agent.The wherein particulate species such as traditional cements blocking agent there are partial sizes big, non-selectivity,
The disadvantages of easily causing reservoir damage；High temperature organogel is on the high side；Thermosetting resin non-selectivity, curing rate are non-to temperature
It is often sensitive, poor controllability；Gel particle blocking agent can not inject earth formation deep；Foam class water shutoff agent plugging strength is too low, stratum is suitable
Answering property is poor.
Patent 201510909656.X discloses a kind of fireflood envelope and alters agent and preparation method thereof；Patent 201410592158.2
Disclose a kind of combustion in situ ignition method and device；Patent 201410592160.X discloses a kind of combustion in situ combustion-assistant ignition
Method；Patent 201510887763.7 discloses a kind of regulating section of oil wells agent and its preparation and application；Patent 201611253606.1
Disclose a kind of sulfur-fixating combustion-promoting high temp profile control agent and the preparation method and application thereof；Patent 201610617729.2 disclose it is a kind of to
The equipment of coal dust and the ignition method of combustion in situ are injected in oil reservoir；Patent 201410592183.0 discloses a kind of oil exploitation
In profile control envelope alter method and device；Patent 201610116728.X discloses the tune in the has channeling channel of a kind of pair of fireflood gas injection well
Cut open method and its tubing string；Patent 201510887763.7 discloses a kind of regulating section of oil wells agent and its preparation and application；Patent
201610454433.3 disclosing a kind of method of combustion in situ air foam profile control；Viscous crude fireflood profile control temporarily blocks up mechanism experiment and grinds
Study carefully, " Inner Mongol petrochemical industry ", 1006-7981, (2011) 22-0154-03；Heavy crude reservoir fireflood injection-production well chemical regulation skill
Art, " special reservoirs ", 2016,23 (5): 122-125；The research of thin interbed heavy crude reservoir fireflood development behavior control technique, " changes
Work management ", 2014 (20): 118-118.
The fireflood reservoir profile method mentioned in above-mentioned patent and article, profile control envelope used, which alters agent, to burn, and exist
In various degree the problem of pollution stratum, efficient resource is wasted, the raising of ultimate recovery is influenced.
Summary of the invention
In order to solve the above technical problem, the present invention provides a kind of combustion-supporting envelope of fireflood oil reservoir and alters method, is suitable for viscous crude
Block, aqueous relatively low 90-95%, oil saturation is relatively high, and there is certain deficit near wellbore zone, prepares fireflood but has gas
Alter the injection well of risk；The present invention, which alters agent by the combustion-supporting envelope of certain technique injection, can make firewire promote uniform and stable, and burning is abundant.
In order to achieve the goal above, the invention adopts the following technical scheme:
A kind of combustion-supporting envelope of fireflood oil reservoir alters method, and party's normal direction injection well, which injects combustion-supporting envelope and alters agent and carry out combustion-supporting envelope, alters；Institute
Stating combustion-supporting envelope and altering agent includes foaming agent and combustion adjuvant.
Preferably, the foaming agent includes but is not limited to aliphatic alcohol polyoxyethylene sulfonate, alkyl betaine, alkyl acyl
Amine glycine betaine, azochlorosulfonate propyl lycine, phosphate ester glycine betaine, fluorine carbon surfactant, sodium alkyl benzene sulfonate, sodium alkyl sulfate and
The combination of one or more of the surfactants such as alkanolamide.Implement envelope by the Jamin effect of foaming agent to alter, auxiliary helps
Combustion agent keeps burning abundant.
Preferably, the combustion adjuvant includes but is not limited to calper calcium peroxide, ammonium persulfate, calcium ammonium nitrate, ammonium nitrate, nitric acid
The combination of one or more of the oxidants such as potassium, potassium permanganate, potassium hyperchlorate and manganese dioxide.Combustion adjuvant catalysis burning is anti-
It answers, so that burning is abundant.
It is further preferred that it is that the combustion-supporting envelope of solution-type alters agent or the combustion-supporting envelope of turbid type alters agent that the combustion-supporting envelope, which alters agent,.
In a preferred embodiment of the invention, the proportion that the combustion-supporting envelope of solution-type alters agent is (to be mainly used for aqueous 95-
98% injection well or the other flammable sealing agent uses of cooperation): dodecyldimethylammonium hydroxide inner salt 40-50wt%, k-12 12
Sodium alkyl sulfate 40-50wt%, ammonium persulfate 10-20wt%, clear water are prepared, and the concentration of solution is 1%-100%, and usage amount is
The side 10-10000.Solution concentration determine depending on stratum it is aqueous number depending on, it is aqueous higher, it is bigger using concentration.When concentration is
When 100%, agent as is altered using the combustion-supporting envelope of prepared solution-type, does not add water dilution.
Consider site requirement and other medicaments being used cooperatively etc., in conjunction with economy, the concentration of aqueous solution is preferably 5-
20%.
Preferably, it is the side 10-10000 that the combustion-supporting envelope of the solution-type, which alters the usage amount of agent,.Specific usage amount is according to reality
The conditional decisions such as hole condition when construction and the medicament being used cooperatively.
In another preferred embodiment of the invention, the proportion that the combustion-supporting envelope of turbid type alters agent is (to be mainly used for aqueous
Injection well greater than 98%): dodecyldimethylammonium hydroxide inner salt 30-40wt%, k-12 lauryl sodium sulfate 30-40wt%,
Calper calcium peroxide 10-20wt%, the 200 mesh above coke powder 1-5wt%, thickener 0.01-0.05wt%, clear water are prepared, peroxide
Change calcium and coke is insoluble in water, formation is turbid, and the concentration of turbid is 1%-100%.Likewise, the specific concentration of turbid
It is determined according to specific construction hole condition, when wherein concentration is 100%, i.e., is no longer diluted with water.Thickener therein is added a small amount of
, specifically can be the thickeners such as common industrial thickener, such as sodium carboxymethylcellulose (CMC), polyacrylamide.
Consider site requirement and other medicaments being used cooperatively etc., in conjunction with economy, the concentration of turbid is preferably 5-20%.
The concentration that the combustion-supporting envelope of turbid type alters agent is 5%-20%.
Preferably, it is the side 100-10000 that the combustion-supporting envelope of turbid type, which alters the usage amount of agent,.Specific usage amount is according to reality
The conditional decisions such as hole condition when construction and the medicament being used cooperatively.
Combustion-supporting envelope of the invention alters agent and can be used alone, and other profile control agents can also be cooperated to carry out slug construction.
Present invention is generally directed to after more round steam soaks, near wellbore zone deficit seriously, prepares fireflood but has has channeling risk
Injection well, especially there is the preparation of channeling history to turn fireflood injection well, the addition of specific foaming agent, combustion adjuvant, combustible organic
Amount and profile control technology are adjusted according to specific Jing Kuang；Several situations are provided in the embodiment of the present invention.
Compared with the prior art, the present invention has the following beneficial effects:
(1) foam envelope alters agent, residual less, not polluted reservoir.
(2) combustion adjuvant is added, burning is abundant.
(3) it is convenient to prepare, easy to operate.
Specific embodiment
In order to illustrate more clearly of the present invention, below with reference to preferred embodiment, the present invention is described further.Ability
Field technique personnel should be appreciated that following specifically described content is illustrative and be not restrictive, this should not be limited with this
The protection scope of invention.
Embodiment 1:
Certain oil field well, 28 meters/2 layers, through 21 round steam soaks, aqueous 99%, latter stage stratum energy deficiency does not go out,
Without value of handling up, switchs to fireflood injection well, according to previous data, there is has channeling risk.For smooth ignition, implement following technique:
1, scheme tripping in electric ignition tool is pressed.
2, the combustion-supporting envelope of turbid type alters agent: dodecyldimethylammonium hydroxide inner salt 40%, k-12 lauryl sodium sulfate 40%, mistake
Calcium oxide 18% crosses 200 mesh coke powders 2%, a small amount of thickener, weight percent, technical grade.Live clear water prepares 5%
508 side of uniform turbid.Injection pressure 0.5-5.2MPa, injection rate 25m3/h。
3, clear water washes above-mentioned combustion-supporting envelope and alters agent preparing tank, and 30 side of washing lotion continues to inject stratum.Injection pressure 5.2MPa, note
Enter speed 15m3/h。
4,10000 mark side's air are replaced.Gas injection speed 8245Nm3/ d, gas injection pressure 6.2MPa.
5, electric ignition device is opened, normal ignition process is started.The well designs 450 DEG C of firing temperature or more, and maximum is implemented
Power 89KW, actual ignition temperature are not measured (thermocouple break), are lighted a fire 18 days, gas injection speed 19138Nm3/ d, gas injection pressure
6.7MPa。
6, the well is smoothly lighted, and has channeling does not occur for corresponding producing well, reaches construction purpose.
Embodiment 2:
The present embodiment is that the other flammable sealing agents of cooperation are completed as the first slug.
10 meters of 14 substratum is newly penetrated out in building oil reservoir fireflood injection well in certain oil field, and water logging, well-flushing is oil-free, according to offset well data,
There is has channeling risk.For smooth ignition, implement following technique:
1, scheme tripping in electric ignition tool is pressed.
2, combustion-supporting envelope alters agent: dodecyldimethylammonium hydroxide inner salt 40%, k-12 lauryl sodium sulfate 40%, ammonium persulfate
20%, weight percent, technical grade.Clear water prepares 10% solution, and the first slug injects 208 sides.Injection pressure 0.5MPa, injection
Speed 30m3/h。
3, clear water washes above-mentioned combustion-supporting envelope and alters agent storage can, and washing lotion continues to inject 180 side of stratum as the second slug.Injection pressure
Power 0.8MPa, injection rate 30m3/h。
4, flammable sealing agent: 80 tons of the dilute crude oil of viscosity 56MPa.s, 19 tons of commercially available long patent flour, 1 ton of calper calcium peroxide.By city
Sell long patent flour and calper calcium peroxide be slowly added in order uniform stirring it is abundant after, as third slug inject.Injection pressure from
0.8MPa rises to 3.6MPa, injection rate 15m3/h。
5, the injection commercially available water-based industrial greasy dirt detergent of 25 sides cleans pit shaft as the 4th slug.Injection pressure
3.5MPa, injection rate 10m3/h。
6, air replaces: 15000 mark side's air are finally replaced as the 5th slug.Gas injection speed 9138Nm3/ d, note
Atmospheric pressure 5.5MPa.
7, electric ignition device is opened, normal ignition process is started.The well designs 450 DEG C of firing temperature or more, and maximum is implemented
Power 93KW, lights a fire 15 days by 461 DEG C of actual ignition temperature, gas injection speed 19720Nm3/ d, gas injection pressure 6.0-5.5-
5.8MPa.The trend that rises afterwards first drop in presentation, and flammable profile control agent participation burning zone, pressure is declined, the later period with gas injection rate increasing
Add, pressure is gone up again.
8, the well is smoothly lighted, and has channeling does not occur for corresponding producing well, reaches construction purpose.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention may be used also on the basis of the above description for those of ordinary skill in the art
To make other variations or changes in different ways, all embodiments can not be exhaustive here, it is all to belong to this hair
The obvious changes or variations that bright technical solution is extended out are still in the scope of protection of the present invention.
Claims (11)
1. a kind of combustion-supporting envelope of fireflood oil reservoir alters method, which is characterized in that the combustion-supporting envelope of party's normal direction injection well injection is altered agent and helped
Combustion envelope is altered；It includes foaming agent and combustion adjuvant that the combustion-supporting envelope, which alters agent,.
2. the combustion-supporting envelope of fireflood oil reservoir according to claim 1 alters method, which is characterized in that the foaming agent is poly alkyl alcohol
Ethylene oxide ether sulfonate, alkyl betaine, alkyl amido betaine, azochlorosulfonate propyl lycine, phosphate ester glycine betaine, fluorine carbon surface
The combination of one or more of activating agent, sodium alkyl benzene sulfonate, sodium alkyl sulfate and alkanolamide.
3. the combustion-supporting envelope of fireflood oil reservoir according to claim 1 alters method, which is characterized in that the combustion adjuvant is peroxidating
One or more of calcium, ammonium persulfate, calcium ammonium nitrate, ammonium nitrate, potassium nitrate, potassium permanganate, potassium hyperchlorate and manganese dioxide
Combination.
4. the combustion-supporting envelope of fireflood oil reservoir according to claim 1 alters method, which is characterized in that it is solution that the combustion-supporting envelope, which alters agent,
The combustion-supporting envelope of type alters agent or the combustion-supporting envelope of turbid type alters agent.
5. the combustion-supporting envelope of fireflood oil reservoir according to claim 4 alters method, which is characterized in that the combustion-supporting envelope of solution-type alters agent
Proportion are as follows: dodecyldimethylammonium hydroxide inner salt 40-50wt%, k-12 lauryl sodium sulfate 40-50wt%, ammonium persulfate
10-20wt% adds water to be configured to the solution that concentration is 1%-100%.
6. the combustion-supporting envelope of fireflood oil reservoir according to claim 5 alters method, which is characterized in that the combustion-supporting envelope of solution-type alters agent
Concentration be 5%-20%.
7. the combustion-supporting envelope of fireflood oil reservoir according to claim 5 alters method, which is characterized in that the combustion-supporting envelope of solution-type alters agent
Usage amount be the side 10-10000.
8. the combustion-supporting envelope of fireflood oil reservoir according to claim 4 alters method, which is characterized in that the combustion-supporting envelope of turbid type alters agent
Proportion are as follows: dodecyldimethylammonium hydroxide inner salt 30-40wt%, k-12 lauryl sodium sulfate 30-40wt%, calper calcium peroxide
10-20wt%, 200 the mesh above coke powder 1-5wt%, thickener 0.01-0.05wt%, adding water to be configured to concentration is 1%-
100% turbid.
9. the combustion-supporting envelope of fireflood oil reservoir according to claim 8 alters method, which is characterized in that the combustion-supporting envelope of turbid type alters agent
Concentration be 5%-20%.
10. the combustion-supporting envelope of fireflood oil reservoir according to claim 8 alters method, which is characterized in that the thickener is carboxymethyl
Sodium cellulosate or polyacrylamide.
11. the combustion-supporting envelope of fireflood oil reservoir according to claim 8 alters method, which is characterized in that the combustion-supporting envelope of turbid type is altered
The usage amount of agent is the side 100-10000.
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Cited By (1)
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| CN117868767A (en) * | 2024-03-13 | 2024-04-12 | 中国石油大学(华东) | Method for improving recovery ratio of thickened oil by utilizing flue gas to form gel |
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