CN106351626B - A kind of oil production method using alkaline electrolysis water drive oil - Google Patents
A kind of oil production method using alkaline electrolysis water drive oil Download PDFInfo
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- CN106351626B CN106351626B CN201610862326.4A CN201610862326A CN106351626B CN 106351626 B CN106351626 B CN 106351626B CN 201610862326 A CN201610862326 A CN 201610862326A CN 106351626 B CN106351626 B CN 106351626B
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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
- E21B43/20—Displacing by water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/4618—Devices therefor; Their operating or servicing for producing "ionised" acidic or basic water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/4618—Devices therefor; Their operating or servicing for producing "ionised" acidic or basic water
- C02F2001/4619—Devices therefor; Their operating or servicing for producing "ionised" acidic or basic water only cathodic or alkaline water, e.g. for reducing
Abstract
The invention discloses a kind of methods using alkaline electrolysis water drive oil, using alkaline electrolysis water drive: electrolyzed alkaline water being mixed with water filling and is directly injected into water injection well progress water drive, or use electrolyzed alkaline water single well stimulation: concentration is injected into producing well for the electrolyzed alkaline water of 1-100%, the bored well of closing well after injection, then opening well and making production again, this method is active strong, and displacement efficiency is high；It is environmentally protective, it is without secondary pollution；Raw material are easy to get, low in cost；Simple process is easy to the advantages that constructing.
Description
Technical field
The invention belongs to oil field development technical fields, more particularly to a kind of oil recovery side using alkaline electrolysis water drive oil
Method.
Background technique
After primary oil recovery and secondary oil recovery, there is also about 2/3rds crude oil to be trapped in oil reservoir for oil exploitation, by
In the effect of capillary force, this part trap is stayed in thinner hollow billet duct, this part oil displacement is come out, increase is depended merely on
Pressure difference is difficult to accomplish.Chemical flooding is important one of oil recovery technique, including polymer flooding in tertiary oil recovery technology, and surface is living
Property agent drive, caustic waterflooding and three kinds of matching used ternary composite drivings.However, there is certain technology limitation in all kinds of chemical floodings
Property.That there is activating agent sweep efficiencys is low for surfactant flooding, oil displacement efficiency is poor, adsorption loss is more serious, activating agent is used
Measure it is big, at high cost, pollution environment the disadvantages of.Occur alkali drive in alkali drive development process and destructively descends rock composition, easily formation thing
Therefore the factors such as equipment are excessively destroyed with basic residual when meeting faintly acid crude oil, caustic waterflooding is just eliminated quickly.Polymer flooding
The problems such as that there is also this subsequent production fluids is difficult, pollution.After ternary composite driving enters fouling peak period, machine-pumped oil well is due to knot
Dirt, leads to frequent holddown, and operating cost increases；It injects the ore in alkali and stratum in liquid and the fluid in stratum occurs instead
It answers, generates a large amount of inorganic scale, accumulated on stratum, the sour gas generated during neutralization reaction can corrosion pipeline material；
The surfactant that soda acid generates is not considered when adding surfactant, will result in process repetition, and increases cost；
These all seriously affect ternary composite driving exploitation benefit.However chemical combined flooding either improves oil recovery in tertiary oil recovery method
Rate amplitude, still reducing cost has very big development potentiality, therefore, it is living to develop efficient, cheap, non-environmental-pollution surface
Property agent and oil displacement system are extremely urgent, to adapt to the situation that high-water-cut stage old filed further increases recovery ratio.
Summary of the invention
The object of the present invention is to provide a kind of environmentally protective, efficient, cheap oil recovery works using alkaline electrolysis water drive oil
Process, this method is active strong, and displacement efficiency is high；It is environmentally protective, it is without secondary pollution；Raw material are easy to get, low in cost；Work
Skill is simple, is easy to the advantages that constructing.
The present invention is achieved through the following technical solutions:
A method of using alkaline electrolysis water drive oil, using alkaline electrolysis water drive: electrolyzed alkaline water is mixed with water filling
It obtains oil driving liquid and is directly injected into water injection well progress water drive.
A method of using alkaline electrolysis water drive oil, using electrolyzed alkaline water single well stimulation: by electrolyzed alkaline water and note
Water is mixed to get liquid injection producing well of handling up, the bored well of closing well after injection, then opening well and making production again, viscosity of the closed time because of crude oil
It is different and different, it needs to refer to core physical simulation oil displacement experiment and determines that throughput time, general closing well closed time are 1h-6d.
In the method for the both the above displacement of reservoir oil, the addition concentration of the oil driving liquid or liquid neutral and alkali electrolysis water of handling up needs basis
Oil driving liquid and formation water salinity Experiment of Compatibility determine, real with the core physical simulation displacement of reservoir oil on the basis of not generating alkaline sedimentation
It tests as reference frame, selects optimum concentration, the pH of general oil driving liquid or liquid of handling up is more than or equal to 8.
The closed time determines that the closed time is general 1h-6d according to core physical simulation oil displacement experiment result.
The injection rate is using remaining oil distribution radius as reference.
The preparation method of the electrolyzed alkaline water, includes the following steps:
Water is after electrolysis installation is electrolysed, through the isolated strong basicity electrolytic aqueous solution of permeable membrane, alkaline electrolysis
Water pH value is in 10-14.
Electrolysis water activity is stronger, needs when transport to seal or closed preservation, what effect was unaffected substantially.Or
Prepared by construction site, to guarantee its active effect.
Electrolysis water be by water under electrolysis, with diaphragm separate and generate acidic electrolytic water and electrolyzed alkaline water it is total
Claim.Electrolyzed alkaline water is the electrolysis water that water is generated through electrolysis, is made of 5-6 micel, and normal water is by 13 micels
Composition, active big, the surface tension very little of this water, penetration is strong, solubility is high, has higher negative oxidation-reduction potential, is both
A kind of soda acid solvent of green, and be a kind of reaction cosolvent.Therefore, electrolyzed alkaline water can increase its infiltration on stratum and expand
Dissipate rate, reduce interfacial tension emulsified crude oil, enhance crude oil fluidity, improve washing oil effect, with conventional surfactant drive and
Ternary composite driving is compared, and oil displacement efficiency is higher；Although electrolyzed alkaline water is in alkalinity, there is no as caustic soda, there are counter ion, tools
There are stronger corrosion and fouling hidden danger, there is stronger anti-rust action instead, protects equipment and pipeline, alkali resistance Precipitation Potential
By force；In addition, the water does not pollute oil reservoir and environment, conventional water is eventually reverted to, without chemical contamination and subsequent secondary place
Manage cost.
The advantages and positive effects of the present invention are:
(1) electrolyzed alkaline water activity is high, and permeability is strong, big in oil reservoir diffusion rate, and washing oil displacement of reservoir oil degree is high.
(2) alkaline electrolysis water energy is effectively reduced that crude oil surface tension is low, and emulsifying effectiveness is good.
(3) electrolyzed alkaline water is in strong basicity, but is different from conventional alkaline solution, does not have safety and corrosion hidden danger, after effect
Conventional water is reverted to, it is environmentally protective without chemical contamination.
(4) electrolysis water source is universal, low in cost.
(5) simple process is easy to construct.
Specific embodiment
A specific embodiment of the invention is described more fully below, this for explaining only the invention, and cannot be construed to pair
Limitation of the invention.
Experimental method used in following embodiments is conventional method unless otherwise specified.
The materials, reagents and the like used in the following examples can obtain unless otherwise specified from common commercial approach.
Embodiment 1:
The oil field A uses waterflooding extraction, is 99% because water drive producing well produces liquid moisture content all the year round, formation water salinity is
5160mg/L, viscosity of crude 110mPa.s.
1) Experiment of Compatibility: electrolyzed alkaline water pH is 13.3, and electrolyzed alkaline water and water filling are mixed to get oil driving liquid, compare phase
With the NaOH solution of pH value, tested with water flooding compatibility as follows:
The compatibility phenomenon of table 1 various concentration oil driving liquid and water flooding
| Serial number | Alkaline electrolysis water concentration | PH value | Compatibility phenomenon | NaOH solution | Compatibility phenomenon |
| 1 | 20% | 10 | It is generated without precipitating | 20% | There is precipitating to generate |
| 2 | 40% | 12.5 | It is generated without precipitating | 40% | There is precipitating to generate |
| 3 | 60% | 12.8 | It is generated without precipitating | 60% | There is precipitating to generate |
| 4 | 80% | 13 | It is generated without precipitating | 80% | There is precipitating to generate |
As it can be seen that the resistance to settling of electrolyzed alkaline water can be stronger, it is different from highly basic.PH value range >=8 meets water drive item
Part, specific concentration are screened by core physical simulation oil displacement experiment effect expedition.
2) core physical simulation oil displacement experiment: carrying out water drive using electrolyzed alkaline water, and parallel rock core is carried out water drive, displacement
It is extremely aqueous up to 99%, then the displacement test of following oil driving liquids is carried out, experimental result is as follows:
The oil displacement efficiency of the different oil driving liquids of table 2
| Serial number | Oil driving liquid | Improve recovery ratio |
| 1 | Water flooding | 0 |
| 2 | Surfactant | 2% |
| 3 | 20% electrolyzed alkaline water | 4% |
| 4 | 40% electrolyzed alkaline water | 10% |
| 5 | 60% electrolyzed alkaline water | 15% |
| 6 | 80% electrolyzed alkaline water | 26% |
From above-mentioned experimental result as it can be seen that relative surfactant drive, using electrolyzed alkaline water oil driving liquid displacement efficiency more
It is high.Comprehensively consider oil displacement efficiency, water drive is carried out using 80% electrolyzed alkaline water, effect is more preferable.
Construction 1 month, clearly, producing well is aqueous averagely to reduce by 8% to field test results, adds up to increase 1.4 ten thousand m of oil3。
Embodiment 2:
The oil field B uses waterflooding extraction, and it is 65% that producing well, which produces liquid moisture content, formation water salinity 10160mg/L, crude oil
Viscosity is 20mPa.s.
1) Experiment of Compatibility: electrolyzed alkaline water pH is 13.9, electrolyzed alkaline water and water filling is mixed to get oil driving liquid, with stratum
Compatible experiment is as follows:
The compatibility phenomenon of table 3 various concentration electrolyzed alkaline water and water flooding
| Serial number | Alkaline electrolysis water concentration | PH value | Compatibility phenomenon |
| 1 | 20% | 12.8 | It is generated without precipitating |
| 2 | 40% | 13 | It is generated without precipitating |
| 3 | 60% | 13.2 | It is generated without precipitating |
| 4 | 80% | 13.6 | It is generated without precipitating |
As it can be seen that electrolyzed alkaline water addition concentration range is all satisfied the water drive condition without precipitating and pH >=8, specific concentration is by rock
The screening of heart physical contradictions effect expedition.
2) core physical simulation oil displacement experiment: carrying out water drive using electrolyzed alkaline water, and parallel rock core is carried out water drive, displacement
It is extremely aqueous up to 65%, then the displacement test of following oil driving liquids is carried out, experimental result is as follows:
The oil displacement efficiency of the different oil driving liquids of table 4
| Serial number | Oil driving liquid | Improve recovery ratio |
| 1 | Water flooding | 1.8% |
| 2 | 20% electrolyzed alkaline water | 18% |
| 3 | 40% electrolyzed alkaline water | 20% |
| 4 | 60% electrolyzed alkaline water | 28% |
| 5 | 80% electrolyzed alkaline water | 30% |
From above-mentioned experimental result as it can be seen that considering cost and oil displacement efficiency, carry out water using 20% electrolyzed alkaline water
It drives, effect is more preferable.
Construction 1 month, clearly, producing well is aqueous averagely to reduce by 6% to field test results, adds up to increase 2.8 ten thousand m of oil3。
Embodiment 3:
The oil field C, no water filling, it is 98% that producing well, which produces liquid moisture content, formation water salinity 10000mg/L, viscosity of crude
For 40mPa.s.
1) Experiment of Compatibility: electrolyzed alkaline water pH is 11.8, electrolyzed alkaline water and water filling is mixed to get liquid of handling up, with stratum
Compatible experiment is as follows:
The Experiment of Compatibility of table 5 various concentration electrolyzed alkaline water and water flooding
As it can be seen that electrolyzed alkaline water addition concentration range is all satisfied the water drive condition without precipitating and pH >=8, specific concentration is by rock
The screening of heart physical contradictions effect expedition.
2) it handles up liquid concentration experiment: single well stimulation logistics organizations being carried out using electrolyzed alkaline water, now various concentration is handled up
Liquid injects in the aqueous parallel rock core up to 98%, fixes tentatively the simulation bored well 8h of closing well, then carry out reverse displacement, investigates the washing oil handled up
Effect, alkaline electrolysis water concentration choose 20%, and Detailed Experimental result is as follows:
6 various concentration of table is handled up the raising recovery ratio effect of liquid
| Serial number | Inject radius | It handles up liquid concentration | Improve recovery ratio |
| 1 | 1/2 rock core | 20% | 3.6% |
| 2 | 1/2 rock core | 40% | 4% |
| 3 | 1/2 rock core | 60% | 5.2% |
| 4 | 1/2 rock core | 80% | 5.5% |
3) closing well closed time is tested: 20% liquid of handling up being selected to carry out core experiment, different closed time experimental results
It is as follows, compared by effect, determines that 12h is best closed time.
The raising recovery ratio effect of the different closed times of table 7
| Serial number | Closed time | Improve recovery ratio |
| 1 | 4h | 2.3% |
| 2 | 8h | 3.6% |
| 3 | 12h | 4.6% |
| 4 | 16h | 3.4% |
To sum up experimental result, select 20% electrolyzed alkaline water handle up liquid injection producing well, injection rate 5000m3, closing well
Bored well 12h (0.5d), after driving a well, aqueous is 80%, adds up to increase oil 4890m3。
Embodiment 4:
The oil field D, it is 99% that producing well, which produces liquid moisture content, formation water salinity 3200mg/L, and viscosity of crude is
113mPa.s。
1) Experiment of Compatibility: electrolyzed alkaline water pH is 13.9, is tested with water flooding compatibility as follows:
The Experiment of Compatibility of table 8 various concentration electrolyzed alkaline water and water flooding
| Serial number | Alkaline electrolysis water concentration | PH value | Compatibility phenomenon |
| 1 | 20% | 12.5 | It is generated without precipitating |
| 2 | 40% | 12.9 | It is generated without precipitating |
| 3 | 60% | 13.4 | It is generated without precipitating |
| 4 | 80% | 13.8 | It is generated without precipitating |
| 5 | 100% | 13.9 | It is generated without precipitating |
As it can be seen that electrolyzed alkaline water addition concentration range is all satisfied the water drive condition without precipitating and pH >=8, specific concentration is by rock
The screening of heart physical contradictions effect expedition.
2) it handles up liquid concentration experiment: single well stimulation logistics organizations is carried out using electrolysis water, now various concentration is handled up liquid note
Enter in the aqueous parallel rock core up to 99%, fix tentatively the simulation bored well 2d of closing well, then carry out reverse displacement, investigates the washing oil effect handled up
Fruit, Detailed Experimental result are as follows:
9 various concentration of table is handled up the raising recovery ratio effect of liquid
| Serial number | Inject radius | It handles up liquid concentration | Improve recovery ratio |
| 1 | 1/2 rock core | 20% | 1.1% |
| 2 | 1/2 rock core | 40% | 1.3% |
| 3 | 1/2 rock core | 60% | 1.8% |
| 4 | 1/2 rock core | 80% | 3.6% |
| 5 | 1/2 rock core | 100% | 7.2% |
3) closing well closed time is tested: 100% liquid of handling up being selected to carry out core experiment, different closed time experimental results
It is as follows, compared by effect, determines that 4d is best material time.
The raising recovery ratio effect of the different closed times of table 10
| Serial number | Closed time | Improve recovery ratio |
| 1 | 1d | 2.6% |
| 2 | 2d | 7.2% |
| 3 | 4d | 8.9% |
| 4 | 6d | 7.8% |
To sum up experimental result selects the liquid injection producing well of handling up of 100% electrolyzed alkaline water, injection rate 3340m3,
The bored well 4d of closing well, after driving a well, aqueous is 84%, adds up to increase oil 6260m3。
Claims (6)
1. a kind of method using alkaline electrolysis water drive oil, which is characterized in that use alkaline electrolysis water drive: by electrolyzed alkaline water with
Water filling is mixed to get oil driving liquid and is directly injected into water injection well progress water drive；
The electrolyzed alkaline water is prepared with the following method: water obtains after electrolysis installation is electrolysed through infiltration UF membrane
To strong basicity electrolytic aqueous solution, electrolyzed alkaline water pH value is in 10-14.
2. a kind of method using alkaline electrolysis water drive oil, which is characterized in that use electrolyzed alkaline water single well stimulation: by alkaline electro
Xie Shuiyu water filling is mixed to get liquid of handling up and is directly injected into producing well, the bored well of closing well after injection, then opening well and making production again；
The electrolyzed alkaline water is prepared with the following method: water obtains after electrolysis installation is electrolysed through infiltration UF membrane
To strong basicity electrolytic aqueous solution, electrolyzed alkaline water pH value is in 10-14.
3. the method for utilizing alkaline electrolysis water drive oil as claimed in claim 1 or 2, the oil driving liquid or liquid neutral and alkali electricity of handling up
The concentration needs of Xie Shui are determined according to oil driving liquid or liquid of handling up with formation water salinity Experiment of Compatibility, are not generate alkaline sedimentation
Benchmark.
4. the pH value of the method for utilizing alkaline electrolysis water drive oil as claimed in claim 3, the oil driving liquid or liquid of handling up is greater than
Equal to 8, optium concentration is determined by core physical simulation oil displacement experiment result.
5. the method for utilizing alkaline electrolysis water drive oil as claimed in claim 2, the closed time is according to core physical simulation
Oil displacement experiment result determines.
6. the method for utilizing alkaline electrolysis water drive oil as claimed in claim 5, the closed time is 1h-6d.
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Citations (7)
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|---|---|---|---|---|
| US3929190A (en) * | 1974-11-05 | 1975-12-30 | Mobil Oil Corp | Secondary oil recovery by waterflooding with extracted petroleum acids |
| US4008769A (en) * | 1975-04-30 | 1977-02-22 | Mobil Oil Corporation | Oil recovery by microemulsion injection |
| CN1172867A (en) * | 1996-08-01 | 1998-02-11 | 刘正立 | Water pressure osmotic membrane electrolytic water device |
| CN1514106A (en) * | 2003-01-24 | 2004-07-21 | 大庆油田有限责任公司 | Method of optimizing trielement composite central displacement system interface tension and trielement system formulation |
| CN103224777A (en) * | 2013-04-25 | 2013-07-31 | 中国石油天然气股份有限公司 | Weak base ternary composite reservoir oil displacement composition with formulated surfactant and application thereof |
| CN103937480A (en) * | 2014-04-14 | 2014-07-23 | 中国石油大学(华东) | Organic alkali/surfactant binary composite oil displacement system as well as preparation method and application thereof |
| CN104559985A (en) * | 2013-10-28 | 2015-04-29 | 中国石油化工股份有限公司 | Surfactant polymer composition for oil displacement and application thereof in tertiary oil recovery |
-
2016
- 2016-09-29 CN CN201610862326.4A patent/CN106351626B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3929190A (en) * | 1974-11-05 | 1975-12-30 | Mobil Oil Corp | Secondary oil recovery by waterflooding with extracted petroleum acids |
| US4008769A (en) * | 1975-04-30 | 1977-02-22 | Mobil Oil Corporation | Oil recovery by microemulsion injection |
| CN1172867A (en) * | 1996-08-01 | 1998-02-11 | 刘正立 | Water pressure osmotic membrane electrolytic water device |
| CN1514106A (en) * | 2003-01-24 | 2004-07-21 | 大庆油田有限责任公司 | Method of optimizing trielement composite central displacement system interface tension and trielement system formulation |
| CN103224777A (en) * | 2013-04-25 | 2013-07-31 | 中国石油天然气股份有限公司 | Weak base ternary composite reservoir oil displacement composition with formulated surfactant and application thereof |
| CN104559985A (en) * | 2013-10-28 | 2015-04-29 | 中国石油化工股份有限公司 | Surfactant polymer composition for oil displacement and application thereof in tertiary oil recovery |
| CN103937480A (en) * | 2014-04-14 | 2014-07-23 | 中国石油大学(华东) | Organic alkali/surfactant binary composite oil displacement system as well as preparation method and application thereof |
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Effective date of registration: 20210329 Address after: No.2, Meiyuan Road, Huayuan Industrial Park, Nankai District, Tianjin Patentee after: Gao Lihong Address before: 300110 Haitai green industrial base m2, No.6 Haitai development road, Huayuan Industrial Zone, Nankai District, Tianjin Patentee before: E-TECH ENERGY TECHNOLOGY DEVELOPMENT Corp. |