CN107605445A - A kind of hypoxemia strengthens air foam displacement of reservoir oil method - Google Patents
A kind of hypoxemia strengthens air foam displacement of reservoir oil method Download PDFInfo
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- CN107605445A CN107605445A CN201710668245.5A CN201710668245A CN107605445A CN 107605445 A CN107605445 A CN 107605445A CN 201710668245 A CN201710668245 A CN 201710668245A CN 107605445 A CN107605445 A CN 107605445A
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Abstract
The invention discloses a kind of hypoxemia to strengthen air foam displacement of reservoir oil method, comprises the following steps：A. the stratum water of measured amounts target reservoir, is slowly added to partially hydrolyzed polyacrylamide (PHPA) dry powder into the stratum water of taking-up, forms polymer solution, and polymer solution Partial hydrolysis polyacrylamide mass concentration is 0.05% 0.18%；B. foaming agent is added in the polymer solution that step a is formed, forms strengthening foam liquid, foaming agent accounts for the mass concentration of polymer solution as 0.05% 0.25%；C. sodium hydrogensulfite, oximes and catalyst cobalt chloride are added in the strengthening foam liquid that step b is formed, form mixed liquor, sodium hydrogensulfite is 0.1 0.2mg/L in the mass concentration of mixed liquor, oximes is 0.05 0.1mg/L in the mass concentration of mixed liquor, and catalyst cobalt chloride is 0.01 0.02mg/L in the mass concentration of mixed liquor；D. step c mixed liquor and air are pressed 1:1 to 1:The displacement of reservoir oil is carried out in 2 volume ratio injection formation at target locations.The present invention is intended to provide a kind of effectively reduce oxygen content and lower-cost hypoxemia reinforcing air foam displacement of reservoir oil method in air.
Description
Technical field
The invention belongs to oil recovery factor technical field, more particularly to a kind of hypoxemia to strengthen air foam displacement of reservoir oil method.
Background technology
Foam flooding is a kind of raising oil recovery factor technology of great potential, but the less stable of single foam, is being sent out
Polymer is added in bubble liquid, the stability of foam can be strengthened, while absorption damage of the foaming agent on clay mineral can be reduced
Consumption, form strengthening foam.Foamed gas are generally air, nitrogen, carbon dioxide, natural gas etc., and wherein air foam is suitable with it
Ying Xingqiang, the advantages that not limited by source of the gas, be good in economic efficiency, receive much attention.Such as China Patent Publication No.：CN102061906, it is public
A kind of air foam slug flow driving process for oil recovery of oil field has been opened, has been comprised the following steps：First, air bubble is determined by laboratory test
The type of foam solution is noted with the slug volume ratio of proportioning, air used and foam solution and scene used in the process of foam slug oil displacement
Enter mode；2nd, scene carries out air foam liquid slug oil displacement, and its oil displacement process is as follows：Preparation before the displacement of reservoir oil；Prepad fluid section
Plug；Air foam slug：Air is replaced with foam solution slug several times and injected from the device specially made in target well；It is empty
After gas foam slug has been noted, according to the dynamic change situation of target well and according to conventional flooding method, using water filling or air injection
Method continues the displacement of reservoir oil to target well.
However, in actual oil displacement process, the hydrocarbon gas dissolved in the oxygen and crude oil that inject in air is mixed
The danger of blast, and the injection of air can increase the meltage of water oxygen, and then the increasing of flood pattern corrosion rate can be caused
Add, and caused corrosion product injects reservoir with injection water, accumulates over a long period and causes reservoir blocking to damage reservoir.
The content of the invention
The present invention is to overcome above-mentioned deficiency of the prior art, there is provided it is a kind of effectively reduce in air oxygen content and
Lower-cost hypoxemia strengthens air foam displacement of reservoir oil method.
To achieve these goals, the present invention uses following technical scheme：
A kind of hypoxemia strengthens air foam displacement of reservoir oil method, comprises the following steps：
A. the stratum water of measured amounts target reservoir, into the stratum water of taking-up being slowly added to partially hydrolyzed polyacrylamide (PHPA) does
Powder, polymer solution is formed, polymer solution Partial hydrolysis polyacrylamide mass concentration is 0.05%-0.18%；
B. foaming agent is added in the polymer solution that step a is formed, forms strengthening foam liquid, foaming agent accounts for polymer solution
Mass concentration be 0.05%-0.25%；
C. sodium hydrogensulfite, oximes and catalyst cobalt chloride are added in the strengthening foam liquid that step b is formed, form mixed liquor,
Sodium hydrogensulfite is 0.1-0.2mg/L in the mass concentration of mixed liquor, and oximes is 0.05-0.1mg/ in the mass concentration of mixed liquor
L, catalyst cobalt chloride are 0.01-0.02mg/L in the mass concentration of mixed liquor；
D. step c mixed liquor and air are pressed 1:1 to 1:The displacement of reservoir oil is carried out in 2 volume ratio injection formation at target locations.
So, add sodium hydrogensulfite, oximes and catalyst cobalt chloride in strengthening foam liquid, wherein sodium hydrogensulfite and
Oximes is compound oxygen scavenger, can be reacted under normal temperature with oxygen, reduce the content of oxygen, catalyst cobalt chloride can effectively improve
The reaction rate and efficiency of sodium hydrogensulfite and oximes and oxygen, the consumption of sodium hydrogensulfite and oximes is reduced, and will not
Destroy polyacrylamide amine molecule.Oxygen in air is removed to safe range, prevents oxygen and the hydrocarbon gas dissolved in crude oil
Mixed explosion, improve the security of oil displacement process.Oxygen is contained first by air by membrane separator before mining site air injection at present
Amount is reduced to 7%, then injection stratum is mixed with expanding foam solution, and this method cost is higher, and is directly entered in this programme by mixed liquor
Row deoxygenation, without purchasing new equipment or carrying out upgrading to existing equipment, cost substantially reduces, and has preferable economy.
Preferably, in the step a, before partially hydrolyzed polyacrylamide (PHPA) dry powder is added into stratum water, stirring
Stratum water forms whirlpool, and partially hydrolyzed polyacrylamide (PHPA) dry powder is slowly added at whirlpool center 2/3, persistently stirs 2h, fill
Dissolving is divided to form polymer solution.So, the dissolving of partially hydrolyzed polyacrylamide (PHPA) dry powder is more thorough, makes partial hydrolysis poly- third
The mass concentration of acrylamide reaches 0.05%-0.18%, and molecular weight is 8,000,000-1,500 ten thousand.
Preferably, in the step b, described foaming agent is alpha-alkene sulfonate class, polyethenoxy ether class, beet
One or more of combinations in alkali, polyoxyethylene ether sulfate class foaming agent.
Preferably, in described step d, when mixed liquor and volume of air ratio are 1:When 1, sodium hydrogensulfite, oximes
It is respectively with mass concentration of the catalyst cobalt chloride in mixed liquor：0.1mg/L、0.05 mg/L、0.01 mg/L.
Preferably, in described step d, when mixed liquor and volume of air ratio are 1:When 2, sodium hydrogensulfite, oximes
It is respectively with mass concentration of the catalyst cobalt chloride in mixed liquor：0.2mg/L、0.1 mg/L、0.02 mg/L.
Preferably, in described step d, the injection rate of mixed liquor is daily 15-70 m3, the injection rate of air
For daily 15-140m3.
The beneficial effects of the invention are as follows：（1）The oxygen concentration during foam flooding in air is set to reach safe range, from
And ensure the security of the air foam displacement of reservoir oil；（2）New equipment need not be purchased or transformation existing equipment, production cost are relatively low；（3）It is anti-
The only increase of the meltage of water oxygen, the corrosion to flood pattern is reduced, reduce corrosion product and inject reservoir with injection water
And cause blocking.
Embodiment
Below by embodiment, the present invention will be further described.
Embodiment 1
A kind of hypoxemia strengthens air foam displacement of reservoir oil method, comprises the following steps：
A. the stratum water of measured amounts target reservoir, weigh a certain amount of partially hydrolyzed polyacrylamide (PHPA) with assay balance and do
Powder, stirring stratum water form whirlpool, partially hydrolyzed polyacrylamide (PHPA) dry powder, partial hydrolysis poly- third are added into the stratum water of taking-up
Acrylamide dry powder is slowly added at whirlpool center 2/3, persistently stirs 2h, and fully dissolving forms polymer solution.Polymer
Solution Partial hydrolysis polyacrylamide mass concentration is 0.05%-0.18%, and molecular weight is 8,000,000-1,500 ten thousand.
B. foaming agent is added in the polymer solution that step a is formed, forms strengthening foam liquid, foaming agent accounts for polymer
The mass concentration of solution is 0.05%-0.25%, and foaming agent can be alpha-alkene sulfonate class, polyethenoxy ether class, glycine betaine, poly-
One or more of combinations in oxygen vinethene Sulfates foaming agent.
C. sodium hydrogensulfite, oximes and catalyst cobalt chloride are added in the strengthening foam liquid that step b is formed, forms mixing
Liquid, sodium hydrogensulfite are 0.1mg/L in the mass concentration of mixed liquor, and oximes is 0.05mg/L in the mass concentration of mixed liquor, is urged
Agent cobalt chloride is 0.01mg/L in the mass concentration of mixed liquor.Sodium hydrogensulfite, oximes and catalysis are added in strengthening foam liquid
Agent cobalt chloride, wherein sodium hydrogensulfite and oximes are compound oxygen scavenger, can be reacted under normal temperature with oxygen, reduce containing for oxygen
Amount, the addition of catalyst cobalt chloride can effectively improve the reaction rate and efficiency of sodium hydrogensulfite and oximes and oxygen, and add
Add agent not break convergence acrylamide molecules, reduce the consumption of sodium hydrogensulfite and oximes, prevent the generation of sulfate reducing bacteria,
The oxygen content injected in air can be reduced within 7% safe range by oxygen scavenger and catalyst.
D. step c mixed liquor and air are pressed 1:The displacement of reservoir oil is carried out in 1 volume ratio injection formation at target locations, mixed liquor
Injection rate is daily 15-70 m3, and the injection rate of air is daily 15-140m3.
Embodiment 2
A kind of hypoxemia strengthens air foam displacement of reservoir oil method, comprises the following steps：
A. the stratum water of measured amounts target reservoir, weigh a certain amount of partially hydrolyzed polyacrylamide (PHPA) with assay balance and do
Powder, stirring stratum water form whirlpool, partially hydrolyzed polyacrylamide (PHPA) dry powder, partial hydrolysis poly- third are added into the stratum water of taking-up
Acrylamide dry powder is slowly added at whirlpool center 2/3, persistently stirs 2h, and fully dissolving forms polymer solution.Polymer
Solution Partial hydrolysis polyacrylamide mass concentration is 0.05%-0.18%, and molecular weight is 8,000,000-1,500 ten thousand.
B. foaming agent is added in the polymer solution that step a is formed, forms strengthening foam liquid, foaming agent accounts for polymer
The mass concentration of solution is 0.05%-0.25%, and foaming agent can be alpha-alkene sulfonate class, polyethenoxy ether class, glycine betaine, poly-
One or more of combinations in oxygen vinethene Sulfates foaming agent.
C. sodium hydrogensulfite, oximes and catalyst cobalt chloride are added in the strengthening foam liquid that step b is formed, forms mixing
Liquid, sodium hydrogensulfite are 0.2mg/L in the mass concentration of mixed liquor, and oximes is 0.1mg/L in the mass concentration of mixed liquor, catalysis
Agent cobalt chloride is 0.02mg/L in the mass concentration of mixed liquor.Sodium hydrogensulfite, oximes and catalyst are added in strengthening foam liquid
Cobalt chloride, wherein sodium hydrogensulfite and oximes are compound oxygen scavenger, can be reacted under normal temperature with oxygen, reduce containing for oxygen
Amount, the addition of catalyst cobalt chloride can effectively improve the reaction rate and efficiency of sodium hydrogensulfite and oximes and oxygen, and add
Add agent not break convergence acrylamide molecules, reduce the consumption of sodium hydrogensulfite and oximes, prevent the generation of sulfate reducing bacteria,
The oxygen content injected in air can be reduced within 7% safe range by oxygen scavenger and catalyst.
D. step c mixed liquor and air are pressed 1:The displacement of reservoir oil is carried out in 2 volume ratio injection formation at target locations, mixed liquor
Injection rate is daily 15-70 m3, and the injection rate of air is daily 15-140m3.
Claims (6)
1. a kind of hypoxemia strengthens air foam displacement of reservoir oil method, comprise the following steps：
A. the stratum water of measured amounts target reservoir, into the stratum water of taking-up being slowly added to partially hydrolyzed polyacrylamide (PHPA) does
Powder, polymer solution is formed, polymer solution Partial hydrolysis polyacrylamide mass concentration is 0.05%-0.18%；
B. foaming agent is added in the polymer solution that step a is formed, forms strengthening foam liquid, foaming agent accounts for polymer solution
Mass concentration be 0.05%-0.25%；
C. sodium hydrogensulfite, oximes and catalyst cobalt chloride are added in the strengthening foam liquid that step b is formed, form mixed liquor,
Sodium hydrogensulfite is 0.1-0.2mg/L in the mass concentration of mixed liquor, and oximes is 0.05-0.1mg/ in the mass concentration of mixed liquor
L, catalyst cobalt chloride are 0.01-0.02mg/L in the mass concentration of mixed liquor；
D. step c mixed liquor and air are pressed 1:1 to 1:The displacement of reservoir oil is carried out in 2 volume ratio injection formation at target locations.
2. a kind of hypoxemia according to claim 1 strengthens air foam displacement of reservoir oil method, it is characterized in that, in the step a,
Added into stratum water before partially hydrolyzed polyacrylamide (PHPA) dry powder, stirring stratum water forms whirlpool, partial hydrolysis polyacrylamide
Amine dry powder is slowly added at whirlpool center 2/3, persistently stirs 2h, and fully dissolving forms polymer solution.
3. a kind of hypoxemia according to claim 1 strengthens air foam displacement of reservoir oil method, it is characterized in that, in the step b, institute
The foaming agent stated is one in alpha-alkene sulfonate class, polyethenoxy ether class, glycine betaine, polyoxyethylene ether sulfate class foaming agent
Kind or several combinations.
4. a kind of hypoxemia according to claim 1 or 2 or 3 strengthens air foam displacement of reservoir oil method, it is characterized in that, described step
In rapid d, when mixed liquor and volume of air ratio are 1:When 1, the matter of sodium hydrogensulfite, oximes and catalyst cobalt chloride in mixed liquor
Measuring concentration is respectively：0.1mg/L、0.05 mg/L、0.01 mg/L.
5. a kind of hypoxemia according to claim 1 or 2 or 3 strengthens air foam displacement of reservoir oil method, it is characterized in that, described step
In rapid d, when mixed liquor and volume of air ratio are 1:When 2, the matter of sodium hydrogensulfite, oximes and catalyst cobalt chloride in mixed liquor
Measuring concentration is respectively：0.2mg/L、0.1 mg/L、0.02 mg/L.
6. a kind of hypoxemia according to claim 1 or 2 or 3 strengthens air foam displacement of reservoir oil method, it is characterized in that, described step
In rapid d, the injection rate of mixed liquor is daily 15-70 m3, and the injection rate of air is daily 15-140m3.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110591681A (en) * | 2019-08-12 | 2019-12-20 | 中国石油天然气股份有限公司 | Foaming system for air foam flooding and preparation method and application thereof |
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| CN102140338A (en) * | 2011-01-04 | 2011-08-03 | 中国石油大学(华东) | Fluorocarbon surfactant binary composite foam flooding system |
| CN102504788A (en) * | 2011-10-25 | 2012-06-20 | 中国石油天然气股份有限公司 | Foaming agent suitable for oil-field development |
| US20140020899A1 (en) * | 2013-04-24 | 2014-01-23 | Sabre Intellectual Property Holdings Llc | Flooding operations employing chlorine dioxide |
| CN103980873A (en) * | 2014-06-04 | 2014-08-13 | 中国地质大学（北京） | Three-phase foam complex oil flooding system and application thereof |
| CN104358551A (en) * | 2014-09-10 | 2015-02-18 | 中国石油大学(北京) | Hypoxic foam flooding method |
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2017
- 2017-08-07 CN CN201710668245.5A patent/CN107605445A/en active Pending
Patent Citations (5)
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| CN102140338A (en) * | 2011-01-04 | 2011-08-03 | 中国石油大学(华东) | Fluorocarbon surfactant binary composite foam flooding system |
| CN102504788A (en) * | 2011-10-25 | 2012-06-20 | 中国石油天然气股份有限公司 | Foaming agent suitable for oil-field development |
| US20140020899A1 (en) * | 2013-04-24 | 2014-01-23 | Sabre Intellectual Property Holdings Llc | Flooding operations employing chlorine dioxide |
| CN103980873A (en) * | 2014-06-04 | 2014-08-13 | 中国地质大学（北京） | Three-phase foam complex oil flooding system and application thereof |
| CN104358551A (en) * | 2014-09-10 | 2015-02-18 | 中国石油大学(北京) | Hypoxic foam flooding method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110591681A (en) * | 2019-08-12 | 2019-12-20 | 中国石油天然气股份有限公司 | Foaming system for air foam flooding and preparation method and application thereof |
| CN110591681B (en) * | 2019-08-12 | 2022-02-01 | 中国石油天然气股份有限公司 | Foaming system for air foam flooding and preparation method and application thereof |
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Application publication date: 20180119 |