CN104130760B - A kind of water blockoff High viscosity crude activator and oilwell water shutoff method - Google Patents
A kind of water blockoff High viscosity crude activator and oilwell water shutoff method Download PDFInfo
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- CN104130760B CN104130760B CN201410317507.XA CN201410317507A CN104130760B CN 104130760 B CN104130760 B CN 104130760B CN 201410317507 A CN201410317507 A CN 201410317507A CN 104130760 B CN104130760 B CN 104130760B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
Abstract
The invention provides a kind of water blockoff High viscosity crude activator and oilwell water shutoff method.The High viscosity crude activator is obtained by mixing by water blockoff with activator and High viscosity crude.Above-mentioned water blockoff is made up of with activator host and auxiliary agent；The host is made up of cocoanut fatty acid diethanolamide with glycosyl surfactant active；In terms of the percentage by weight of the water blockoff activator, its composition includes：Cocoanut fatty acid diethanolamide 30 50%, glycosyl surfactant active 30 50%, auxiliary agent 5 20%.Present invention also offers a kind of oilwell water shutoff method using the High viscosity crude activator.High viscosity crude activator of the invention is environment-friendly, technique is simple, stratum compatibility is good, selective blocking outlet capacity strong, it is wide to adapt to Oil Reservoir Types, and raw material dosage is few, cost is low, nontoxic non-volatile, nonflammable, safe operation, do not need clear water or deionization to prepare, site operation is not in that crude oil is emulsified on ground, the problems such as leading to not injection stratum.
Description
Technical field
The present invention relates to a kind of water blockoff High viscosity crude activator and oilwell water shutoff method, belong to oilwell water shutoff field.
Background technology
Oil field enters middle-late waterflooding stage, aqueous continuous rising, yield rapid decrement.It is strong or micro- by reservoir heterogeneity
Fracture development influences, and water logging, water breakthrough, bottom water coning are serious.Water drive involves otherness greatly in plane, and longitudinal direction water suction is uneven, injection
Water causes water drive control and development degree low along water breakthrough passage fingering.Merely by profile control, measure effect is not ideal enough,
Steady oil control shipwreck degree is big.Therefore, it is necessary to take the Thoughts of " adjusting bridging to close ".
Conventional water-plugging technique is mostly non-selective water-plugging at present, interlayer big, hole condition good oil clear and definite to water-yielding stratum
Well, its effect is relatively good.And for the oil well that interlayer is small, hole condition is poor, water detection difficulty is big, particularly Bian Shui, bottom water and injection water
Advance by leaps and bounds, using non-selective water blockoff, also block oil reservoir while water blockoff in layer, very major injury is produced to oil reservoir.Therefore, select
Selecting property water-plugging technique arises at the historic moment.
Current selective water plugging technology is main based on partially hydrolyzed polyacrylamide (PHPA) class, activation viscous crude class.But polypropylene
Amide-type water shutoff agent is influenceed by formation temperature, and plastic stability is poor, and the term of validity is short, and activates viscous crude water blockoff as a selectivity
The good, water shutoff in oil well harmless to oil reservoir, is received significant attention in recent years, and the key issue of the technology is preferably properly
Crude oil emulsifying agent, current crude oil emulsifying agent for water plugging of oil well is mainly the water-in-oil emulsifiers such as SP-80, LHK-1.
CN1429885A, CN1760338A individually disclose some crude oil emulsifying agents and preparation method thereof.Presently disclosed above-mentioned crude oil
The comparison of ingredients of emulsifying agent is complicated, cost is higher or actual use in economic benefits comparison it is poor.
CN102061153A, GAI12CN0369C individually disclose a kind of crude oil emulsifying agent for water plugging of oil well and its preparation side
Method, the raw material of the emulsifying agent is dimethylamine, epoxychloropropane, oleic acid and water.But found by desk research, the emulsifying agent
There are problems that raw material have volatility, it is inflammable, it is necessary to prepared in advance in reactor, process for preparation very exothermic, grasp
Make dangerous, and blocking agent temperature tolerance is poor, requires high to oil reservoir physical property, while must be prepared with clear water or deionization, it may appear that
Crude oil is emulsified on ground when constructing at the scene, the problems such as leading to not injection stratum.
Therefore, it is necessary to find, a kind of environment-friendly, preparation technology is simple, temperature tolerance is good, intensity is high, adapt to Oil Reservoir Types
Scope wide crude oil activating agent solves the above problems.
The content of the invention
In order to solve the above technical problems, it is an object of the invention to provide a kind of water blockoff High viscosity crude activator.This hair
Water blockoff High viscosity crude activator in bright has the advantages that environment-friendly, raw material is simple, emulsifying effectiveness is good, plugging strength is big.
The present invention also aims to provide the oilwell water shutoff method using above-mentioned High viscosity crude activator.
To reach above-mentioned purpose, the present invention provides a kind of water blockoff activator, and it is made up of host and auxiliary agent；The host
It is made up of cocoanut fatty acid diethanolamide with glycosyl surfactant active.
According to specific embodiments of the present invention, it is preferable that in terms of the percentage by weight of water blockoff activator, the water blockoff is used
Activator includes：Cocoanut fatty acid diethanolamide 30-50%, glycosyl surfactant active 30-50%, auxiliary agent 5-20%.
According to specific embodiments of the present invention, it is highly preferred that the water blockoff includes coco-nut oil fatty acid diethyl with activator
Alkylolamides 35-45%, glycosyl surfactant active 35-45%, auxiliary agent 10-15%.
In above-mentioned water blockoff activator, it is preferable that the cocoanut fatty acid diethanolamide of use is lived with glycosyl surface
Property agent weight ratio be 1:1.
In above-mentioned water blockoff activator, it is preferable that the molecular formula of the glycosyl surfactant active used is RCOOC12H12O3
(OH)8, in formula, R is aliphatic acid alkyl；It is highly preferred that R includes the aliphatic acid alkyl that carbon number is 12,14,16.
In above-mentioned water blockoff activator, it is preferable that the glycosyl surfactant active of use includes stearic acid sucrose ester, bay
One or more of combinations in sour sucrose ester, palmitic acid sucrose ester.The above-mentioned glycosyl surfactant active that the present invention is used with it is non-
Ionic surface active agent is used together with obvious synergy.
In above-mentioned water blockoff activator, it is preferable that stearic acid sucrose ester, sucrose laurate, the palmitic acid sugarcane of use
The sucrose ester of sugar ester is sucrose monoester.Monoester content is higher in sucrose ester, and hydrophily is stronger, therefore excellent in the sucrose ester of use
Select monoesters therein, in order to make after crude oil activating to emulsify with stratum water or injection water Rapid contact.
In above-mentioned water blockoff activator, it is preferable that the auxiliary agent of use includes ethylenediamine tetramethylene phosphate, divinyl
One or more of combinations in triamine pentamethyl phosphate, aminotrimethylene phosphate, hydroxy ethylidene-diphosphate salt.This
The auxiliary agent used is invented for four kinds of organophosphor complexing agents, this kind of product chelating ability will be strong than EDTA class, phosphoric acid salt etc., complexing
Stability constant is big, and metal ion etc. is not easy dissociation after being complexed, and chemical-resistant stability is good, there is extraordinary network splitting or integrating
Scattered, suspending power；There are scale inhibition, inhibition, change dirty function, will not also be lost activity at 200 DEG C, and itself is substantially nontoxic, it is nuisanceless
Pollution.
Present invention also offers the preparation method of above-mentioned water blockoff activator, this method comprises the following steps：At normal temperatures,
Cocoanut fatty acid diethanolamide, glycosyl surfactant active, auxiliary agent are sequentially added into agitator tank, is well mixed, that is, is somebody's turn to do
Oilwell water shutoff activator.
The present invention also provides a kind of water blockoff High viscosity crude activator, and it is solidifying thick by above-mentioned water blockoff activator and height
What oil was obtained by mixing.
In above-mentioned water blockoff with High viscosity crude activator, wherein, the water blockoff is 2-10wt% with the content of activator,
Preferably 3-7wt%.
In above-mentioned High viscosity crude activator, it is preferable that the freezing point of the High viscosity crude used is more than 40 DEG C, 50 DEG C
When its viscosity be more than 2000mPas, moisture content be less than 5%.
Present invention also offers a kind of oilwell water shutoff method, it comprises the following steps：
The hot sewage that first implantation temperature is 40-90 DEG C into oil well, salinity is 100-100000mg/L makees preposed attributives,
Purpose is that, in order to preheat pit shaft, frictional resistance of the crude oil and High viscosity crude activator that reduction is subsequently implanted into pit shaft is easy to Gao Ning
Viscous crude activator is rapidly injected hypertonic exhalant canal；Wherein, the salinity of hot sewage is little to influential effect, but temperature is necessary
Ensure more than 40 DEG C, pit shaft can be avoided too low because of temperature, cause the High viscosity crude solidification or viscosity change that are subsequently implanted into big, and nothing
Method is smoothly injected；
High viscosity crude is injected into oil well again, it is therefore an objective to play isolation preposed attributives and the High viscosity crude being subsequently implanted into activation
Agent, prevents from, in pit shaft internal emulsification, causing viscosity rapid increase, influence is subsequently implanted into；
Above-mentioned water blockoff is pumped into stratum with High viscosity crude activator, under the double action of outer injection pressure power and speed, one
Part forms high viscous w/o type emulsion by seepage effect and stratum water or injection water emulsification, water outlet duct is blocked, so as to increase
Plus the flow resistance of driven water-replacing, while high viscous w/o type emulsion constantly forms scattered emulsion ball in water layer, pass through merchant
Quick effect blocks pore throat, plays reduction water-yielding stratum back pressure, reduces the effect that oil well produces water；Another part is run into after in-place oil,
Under the double action of outer injection pressure power and speed, merged with in-place oil, dredge oil reservoir, and the output in oil well production, realize
Water blockoff does not block up the selective water plugging purpose of oil；
Hot sewage is injected into oil well again and makees displacement fluid, it is therefore an objective to makes High viscosity crude activator quickly newborn near wellbore zone
Change, prevent oil well is opened from taking out that rear crude oil is counter to be told, while also saving crude oil consumption；Closing well 4-7 days, opens and takes out low jig frequency production one week
Afterwards, become a full member normal production.
The water blockoff that the present invention is provided is a kind of excellent activator with High viscosity crude activator.Used with existing oilwell water shutoff
Activator is compared, and the activator that provides of the present invention has that environment-friendly, technique is simple, stratum compatibility is good, selective water plugging energy
Power is strong, adapt to the advantages of Oil Reservoir Types are wide, and raw material dosage is few, cost is low, nontoxic non-volatile, nonflammable, safe operation, no
Clear water or deionization is needed to prepare, site operation is not in that crude oil is emulsified on ground, the problems such as leading to not injection stratum.
Embodiment
In order to which technical characteristic, purpose and beneficial effect to the present invention are more clearly understood from, now to the skill of the present invention
Art scheme carry out it is described further below, but it is not intended that to the present invention can practical range restriction.
Embodiment 1
A kind of water blockoff activator is present embodiments provided, it includes consisting of：
Cocoanut fatty acid diethanolamide：3 parts by weight；
Stearic acid sucrose ester：3 parts by weight；
Ethylenediamine tetramethylene sodium phosphate：1 parts by weight.
The preparation method of above-mentioned water blockoff activator comprises the following steps：
Cocoanut fatty acid diethanolamide, stearic acid sucrose ester, ethylenediamine tetramethylene phosphate are sequentially added and stirred
Tank is mixed, is well mixed, you can obtain water blockoff activator.
Embodiment 2
A kind of water blockoff High viscosity crude activator is present embodiments provided, it includes consisting of：
Cocoanut fatty acid diethanolamide：3 parts by weight；
Stearic acid sucrose ester：3 parts by weight；
Diethylenetriamine pentamethyl sodium phosphate：1 parts by weight；
Liaohe River Niuxintuo oil field High viscosity crude：93 parts by weight.
Wherein, the design parameter of Liaohe River Niuxintuo oil field High viscosity crude is as follows：Oil viscosity (76 DEG C)：
76.3mPas, 50 DEG C of viscosity of crude：2130mPas, freezing point：41-55 DEG C, oil field water type：NaHCO3Type, salinity：
321-9283mg/L。
The preparation method of above-mentioned water blockoff High viscosity crude activator comprises the following steps：
Cocoanut fatty acid diethanolamide, stearic acid sucrose ester, diethylenetriamine pentamethyl sodium phosphate are sequentially added
Agitator tank, after being well mixed, after it is mixed evenly with Liaohe River Niuxintuo oil field High viscosity crude, obtains water blockoff height solidifying thick
Oily activator.
The performance evaluation of High viscosity crude activator：
The heat that temperature is 50 DEG C, salinity is 6283mg/L is added in High viscosity crude activator into the present embodiment dirty
Water, obtains mixing emulsion system, the mixing emulsion system moisture content is respectively reached 40%, 50%, 60%, 70%,
80%th, 90%, the activity function of High viscosity crude activator is investigated by tested viscosity.Different water cut emulsion at 50 DEG C
Viscosity data is as shown in table 1.
Table 1
| Moisture content (%) | 40 | 50 | 60 | 70 | 80 | 90 |
| Viscosity (mPas) | 22598 | 28675 | 30324 | 31469 | 27532 | 25631 |
Embodiment 3
A kind of water blockoff High viscosity crude activator is present embodiments provided, it includes consisting of：
Cocoanut fatty acid diethanolamide：4 parts by weight；
Sucrose laurate：4 parts by weight；
Hydroxy ethylidene-diphosphate sodium：2 parts by weight；
Liaohe River Niuxintuo oil field High viscosity crude：93 parts by weight.
Wherein, the design parameter of Liaohe River Niuxintuo oil field High viscosity crude is as follows：Oil viscosity (76 DEG C)：
76.3mPas, 50 DEG C of viscosity of crude：2130mPas, freezing point：41-55 DEG C, oil field water type：NaHCO3Type, salinity：
321-9283mg/L。
The preparation method of above-mentioned water blockoff High viscosity crude activator comprises the following steps：
Cocoanut fatty acid diethanolamide, sucrose laurate, aminotrimethylene sodium phosphate are sequentially added into stirring
Tank, after being well mixed, after it is mixed evenly with Liaohe River Niuxintuo oil field High viscosity crude, obtains water blockoff and is lived with High viscosity crude
Agent.
The performance evaluation of High viscosity crude activator：
The heat that temperature is 50 DEG C, salinity is 6283mg/L is added in High viscosity crude activator into the present embodiment dirty
Water, the High viscosity crude activator in the present embodiment is configured to aqueous 60% mixed emulsion, distinguish the salinity of the system
For 6000mg/L, 8000mg/L, 10000mg/L, 12000mg/L, 15000mg/L, 20000mg/L, next, should by test
The viscosity of mixed emulsion system investigates the adaptability and compatibility of the High viscosity crude activator in the present embodiment and stratum water.50
DEG C when, the viscosity data of the above-mentioned mixing emulsion of different salinities is as shown in table 2.
Table 2
| Salinity (mg/L) | 6000 | 8000 | 10000 | 12000 | 15000 | 20000 |
| Viscosity (mPas) | 32142 | 31890 | 30764 | 29880 | 28631 | 28426 |
Embodiment 4
A kind of water blockoff High viscosity crude activator is present embodiments provided, it includes consisting of：
Cocoanut fatty acid diethanolamide：3.5 parts by weight；
Palmitic acid sucrose ester：3.5 parts by weight；
Aminotrimethylene sodium phosphate：1.5 parts by weight；
Liaohe River Niuxintuo oil field High viscosity crude：93 parts by weight.
Wherein, the design parameter of Liaohe River Niuxintuo oil field High viscosity crude is as follows：Oil viscosity (76 DEG C)：
76.3mPas, 50 DEG C of viscosity of crude：2130mPas, freezing point：41-55 DEG C, oil field water type：NaHCO3Type, salinity：
321-9283mg/L。
The preparation method of above-mentioned water blockoff High viscosity crude activator comprises the following steps：
Cocoanut fatty acid diethanolamide, palmitic acid sucrose ester, aminotrimethylene sodium phosphate are sequentially added into stirring
Tank, after being well mixed, after it is mixed evenly with Liaohe River Niuxintuo oil field High viscosity crude, obtains water blockoff and is lived with High viscosity crude
Agent.
The performance evaluation of High viscosity crude activator：
It is 50 DEG C that temperature is added in High viscosity crude activator into the present embodiment, and salinity is dirty for 6283mg/L heat
Water, be configured to aqueous 60% mixed emulsion, temperature tolerance and stability are investigated by tested viscosity.Emulsus under different temperatures
The viscosity data of liquid is as shown in table 3.
Table 3
| Temperature (DEG C) | 50 | 60 | 70 | 80 | 90 | 100 |
| Viscosity (mPas) | 33643 | 34890 | 35631 | 33288 | 28790 | 25421 |
High viscosity crude activator stability data is as shown in table 4.
Table 4
| Time (d) | 7 | 15 | 30 | 60 | 120 | 150 | 180 |
| Viscosity (mPas) | 35439 | 38972 | 37521 | 35466 | 33723 | 31686 | 29780 |
Embodiment 5
A kind of water blockoff High viscosity crude activator is present embodiments provided, it includes consisting of：
Cocoanut fatty acid diethanolamide：3.5 parts by weight；
Stearic acid sucrose ester：3.5 parts by weight；
Ethylenediamine tetramethylene sodium phosphate：1.5 parts by weight；
Liaohe River Niuxintuo oil field High viscosity crude：93 parts by weight.
Wherein, the design parameter of Liaohe River Niuxintuo oil field High viscosity crude is as follows：Oil viscosity (76 DEG C)：
76.3mPas, 50 DEG C of viscosity of crude：2130mPas, freezing point：41-55 DEG C, oil field water type：NaHCO3Type, salinity：
321-9283mg/L。
The preparation method of above-mentioned water blockoff High viscosity crude activator comprises the following steps：
Cocoanut fatty acid diethanolamide, stearic acid sucrose ester, ethylenediamine tetramethylene sodium phosphate are sequentially added and stirred
Tank is mixed, after being well mixed, after it is mixed evenly with Liaohe River Niuxintuo oil field High viscosity crude, water blockoff High viscosity crude is obtained
Activator.
The performance evaluation of High viscosity crude activator：
Laboratory core simulated experiment is taken, permeability before and after test closure investigates obtained High viscosity crude activator selection
Property and plugging strength.The selection performance of High viscosity crude activator is as shown in table 5.
Table 5
The plugging strength performance of High viscosity crude activator is as shown in table 6.
Table 6
High viscosity crude activator water blockoff skill is applied altogether in Gaosheng oil field High viscosity crude, common heavy oil and thin oil block within 2012
The well of art 8, average 365 tons of individual well incremental oil production, average 1215 tons of single sinking has seen significant oil increasing precipitation effect.Can
See, the oilwell water shutoff that provides of the present invention can be well adapted for different oil with High viscosity crude activator is environment-friendly, technique is simple
Type is hidden, and preferable selective water plugging effect can be realized, stratum compatibility is good and raw material dosage is few, has saved and has been produced into
This, nontoxic non-volatile, nonflammable, safe operation, does not need clear water or deionization to prepare, and site operation is not in crude oil on ground
Face is emulsified, the problems such as leading to not injection stratum.Therefore, the High viscosity crude activator can promote crude output to improve, reduction
Multi-purpose station sewage load, with very high economic value.
Claims (12)
1. a kind of water blockoff High viscosity crude activator, it is obtained by mixing by water blockoff with activator and High viscosity crude；
Wherein, the water blockoff is made up of with activator host and auxiliary agent；The host is by cocoanut fatty acid diethanolamide and sugar
Based surfactants are constituted；
In terms of the percentage by weight of water blockoff activator, the content of the cocoanut fatty acid diethanolamide is 30-50%, institute
The content for stating glycosyl surfactant active is 30-50%, and the content of the auxiliary agent is 5-20%；
The auxiliary agent includes ethylenediamine tetramethylene phosphate, diethylenetriamine pentamethyl phosphate, aminotrimethylene phosphoric acid
One or more of combinations in salt, hydroxy ethylidene-diphosphate salt.
2. water blockoff according to claim 1 High viscosity crude activator, wherein, the cocoanut fatty acid diethanolamide
Content be 35-45%, the content of the glycosyl surfactant active is 35-45%, and the content of the auxiliary agent is 10-15%.
3. water blockoff according to claim 1 High viscosity crude activator, wherein, the cocoanut fatty acid diethanolamide
Weight ratio with glycosyl surfactant active is 1:1.
4. water blockoff according to claim 1 High viscosity crude activator, wherein, the molecular formula of the glycosyl surfactant active
For RCOOC12H12O3(OH)8, in formula, R is aliphatic acid alkyl.
5. water blockoff according to claim 4 High viscosity crude activator, wherein, R includes the fat that carbon number is 12,14,16
Sour alkyl.
6. water blockoff according to claim 4 High viscosity crude activator, wherein, the glycosyl surfactant active includes tristearin
One or more of combinations in sour sucrose ester, sucrose laurate, palmitic acid sucrose ester.
7. water blockoff according to claim 6 High viscosity crude activator, wherein, the stearic acid sucrose ester, laurate sugarcane
Sugar ester, the sucrose ester of palmitic acid sucrose ester are sucrose monoester.
8. the water blockoff High viscosity crude activator according to claim any one of 1-7, wherein, in the High viscosity crude activator
In, the water blockoff is 2-10wt% with the content of activator.
9. water blockoff according to claim 8 High viscosity crude activator, wherein, the water blockoff is 3- with the content of activator
7wt%.
10. according to claim 1-7, the High viscosity crude activator of the water blockoff described in 9 any one, wherein, the High viscosity crude
Freezing point is more than 40 DEG C, and its viscosity is more than 2000mPas at 50 DEG C, and moisture content is less than 5%.
11. water blockoff according to claim 8 High viscosity crude activator, wherein, the freezing point of the High viscosity crude is 40
More than DEG C, its viscosity is more than 2000mPas at 50 DEG C, and moisture content is less than 5%.
12. a kind of oilwell water shutoff method, this method comprises the following steps：
A, the hot sewage that implantation temperature is 40-90 DEG C, salinity is 100-100000mg/L into oil well make preposed attributives；
B, High viscosity crude is injected into oil well again；
C, the water blockoff described in any one of claim 1 to 11 with High viscosity crude activator is pumped into stratum；
D, hot sewage is injected into oil well again making displacement fluid, closing well 4-7 days is opened and taken out after low jig frequency produces one week, normal production of becoming a full member.
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| CN104559975B (en) * | 2014-12-24 | 2017-05-10 | 中国石油天然气股份有限公司 | Water shutoff agent as well as preparing method and application thereof |
| CN104789202B (en) * | 2015-03-14 | 2017-08-25 | 肖传敏 | A kind of alternative effect thickening thin oil profile control agent and preparation method thereof |
| CN104927814B (en) * | 2015-05-08 | 2018-03-20 | 中国石油化工股份有限公司 | Profile control nanometer self aggregation system and preparation method thereof |
| CN104962261B (en) * | 2015-05-21 | 2017-11-10 | 中国石油天然气股份有限公司 | A kind of water blockoff thickening agent and the water blockoff thin oil thickening agent being made from it |
| CN108035697B (en) * | 2017-12-01 | 2020-07-10 | 中国石油天然气股份有限公司 | Oil-based selective water plugging method by cooling method |
| CN111154468B (en) * | 2020-01-06 | 2022-08-26 | 西南石油大学 | Selective water shutoff agent for oilfield water shutoff |
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| CN1395024A (en) * | 2002-08-19 | 2003-02-05 | 石油大学(华东) | Viscous oil emulsion phase-inversion profile control water blockoff |
| CN103097500A (en) * | 2010-08-31 | 2013-05-08 | 国立大学法人东京大学 | W/O nanoemulsion and method for producing same |
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| CN101824979B (en) * | 2010-05-12 | 2012-10-31 | 闫若曦 | Emulsion process profile control and water shutoff method of thickened oil steam huff-puff wells |
| CN102277143B (en) * | 2011-05-30 | 2013-03-27 | 中国海洋石油总公司 | W/O/W type active viscous oil blocking agent used in oil well, and preparation method thereof |
| CN102876305B (en) * | 2011-07-14 | 2015-03-18 | 中国石油化工股份有限公司 | Oil well water shutoff agent and oil well water shutoff method |
| CN103666434B (en) * | 2012-09-17 | 2015-10-28 | 中国石油化工股份有限公司 | A kind of high temperature resistant heavy crude heat extraction compound oil displacement agent |
| CN103242971B (en) * | 2013-05-03 | 2015-02-04 | 武汉理工大学 | Green efficient thick oil dirt nearly-neutral water-based cleaning agent without adding any acid-base |
| CN103468235A (en) * | 2013-09-26 | 2013-12-25 | 东北石油大学 | Chemical assistant for thermal recovery of thick oil and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1395024A (en) * | 2002-08-19 | 2003-02-05 | 石油大学(华东) | Viscous oil emulsion phase-inversion profile control water blockoff |
| CN103097500A (en) * | 2010-08-31 | 2013-05-08 | 国立大学法人东京大学 | W/O nanoemulsion and method for producing same |
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