CN107652960A - Enhancing emulsifying combination flooding composition and its application containing sulfosalt surfactant - Google Patents
Enhancing emulsifying combination flooding composition and its application containing sulfosalt surfactant Download PDFInfo
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Abstract
The present invention provides a kind of enhancing emulsifying combination flooding composition and its application containing sulfosalt surfactant, is counted using the gross weight of the enhancing emulsifying combination flooding composition as 100%, it includes：Sulfonate complexed surfactant 0.05wt% 0.3wt%, polymer 0.1wt% 0.25wt%, the 1.2wt% of sodium carbonate 0, surplus is water；Wherein, counted using the gross weight of the sulfonate complexed surfactant as 100%, the sulfonate complexed surfactant is made up of 5wt% 95wt% petroleum sulfonate and 95wt% 5wt% alkyl benzene sulfonate surfactant.It is provided by the present invention enhancing emulsifying combination flooding composition contain sulfonate complexed surfactant, with weak base or it is alkali free in the case of, can make oil water interfacial tension reach the ultralow order of magnitude (<1×10‑2MN/m), while the enhancing emulsifying combination flooding composition has stronger emulsion stability.
Description
Technical field
The present invention relates to a kind of enhancing emulsifying combination flooding composition containing sulfosalt surfactant and its application, belong to
Technical field of petroleum extraction.
Background technology
The main force of CNPC oilfield water flooding, which develops oil fields, at present mostly enters " double height " exploitation of High water cut, high recovery percent of reserves
Stage, the difficulty for further improving recovery ratio increase.Simultaneously with the increasing to oil demand pressure and old filed recovery percent
Further deepen, the importance that tertiary oil recovery improves recovery efficiency technique will display all the more.Chemical combined flooding technology is through scene
Experiment is proved to be one of effective ways for increasing substantially high water cut oil field recovery ratio.After chemical combined flooding technology is the eighties
The new method that can increase substantially recovery ratio that phase grows up, by the effort of more than 20 years, in surfactant oil displacement
Development, formula system research, mechanism of oil displacement research, the development of combination flooding numerical simulation software, field test conceptual design, note adopt work
Skill research, field test dynamic monitoring research etc. achieve major progress, so that the success of chemical combined flooding oil tech
Ground enters field test conceptual phase by desk research.From 1992, China was successively in triumph, big Khanh Hoa Kelamayi
Oil field has carried out multiple alkali, surfactant and polymers (ASP) ternary chemical combined flooding pilot field test and industrialization ore deposit
Field experiment.These field tests adhere to different oily areas, the reservoir condition significant difference of trial zone, but chemical combined flooding mining site separately and tried
Test and seen obvious effect, chemical combined flooding raising recovery ratio is higher, is 15%-25% (OOIP), and this is multiple for chemistry
The popularization and application for closing technology of reservoir sweep present wide prospect.
The species of surfactant oil displacement mainly has：Petroleum sulfonate, heavy alkylbenzene sulfonate, petroleum carboxylate, alkene
Sulfonated hydrocarbon, lignosulfonates, alcohol ether sulfonate, nonionic surfactant, biosurfactant and amphoteric surface live
Property agent etc..First two surfactant, which has been applied to Oil Field, to be tested.Such as Daqing oil field uses domestic heavy alkyl benzene sulphur
Acid salt surfactant has achieved good oil increasing effect, but field test research in highly basic ASP ternary composite driving field tests
In the problem of some are new continuously emerges again, as field test has used with formula system the highly basic of higher concentration, in some examinations
Test area and find that oil well fouling is serious, pump detection period shortens, so as to add the technical difficulty of oil recovery and fringe cost, or even directly
Influence the normal production of oil well；Secondly as alkali concn height has considerable influence to ternary system viscosity, in order to reach the stream of design
Spend control ability, it has to the concentration of polymer in formula system is increased, so as to add the cost of oil displacement agent；It is in addition, multiple
It is big to close drive production fluid dewater treatment difficulty, cost for oil production increase.
Therefore, combination flooding technology is driven onto weak base ASP ternary composite drivings or alkali-free SP by highly basic ASP tri compounds at present
Binary combination flooding changes.It is adapted to the petroleum sulfonate of Weak Base ASP Flood system also to be applied in Daqing oil field, but still
The problems such as properties of product are to the adaptability of profit and raising product emulsifiability be present.Long carbon chain betaine type amphoteric surface-active
Agent also begins to use in surfactant and polymer (SP) alkali-free compound flooding formula.But because dissolubility is poor, price, limit
Its application is made.Desk research and field test show in recent years, and in addition to interfacial tension is reduced, emulsifiability carries to combination flooding
High recovery rate influential effect is very big, and especially weak base ASP ternarys and alkali-free SP binary composite displacement systems, the negative effect of alkali are obtained
Decrease eliminates, but the emulsifiability of system also weakens significantly, especially alkali-free binary combination flooding system, and emulsifiability is poor, drives
Oily effect is poor.Recently research have indicated that enhancing system emulsifiability is favorably improved recovery ratio, appropriate emulsification is matched somebody with somebody to combination flooding
Fang Gaishan oil displacement efficiencies are particularly significant.For this reason, it is necessary to develop the weak base ASP ternarys of emulsifying or alkali-free SP binary combination floodings are matched somebody with somebody
Side, its emulsifiability is moderately improved mainly under the conditions of weak base or alkali-free by the improvement of surfactant formula, so as to
While strong base ternary composite driving side effect is reduced, enhancing weak base ternary, the oil displacement efficiency of alkali-free binary combination flooding, realize big
Amplitude improves the effect of field application of recovery ratio.The combination flooding formula development of efficient fanout free region is also chemical combined flooding in all kinds of oil
Hide the developing direction and research emphasis of popularization and application.
In summary, there is provided a kind of enhancing emulsifying combination flooding composition containing sulfosalt surfactant is simultaneously used it for
Turn into the technical problem of this area urgent need to resolve in tertiary oil recovery.
The content of the invention
In order to solve the shortcomings that above-mentioned and deficiency, it is an object of the invention to provide a kind of containing sulfosalt surfactant
Strengthen emulsifying combination flooding composition.
The present invention also aims to provide the above-mentioned enhancing emulsifying combination flooding composition containing sulfosalt surfactant
Application in tertiary oil recovery.
To reach above-mentioned purpose, the present invention provides a kind of enhancing emulsifying combination flooding combination containing sulfosalt surfactant
Thing, counted using the gross weight of the enhancing emulsifying combination flooding composition as 100%, it includes：
Sulfonate complexed surfactant 0.05wt%-0.3wt%,
Polymer 0.1wt%-0.25wt%,
Sodium carbonate 0-1.2wt%,
Surplus is water；
Wherein, counted using the gross weight of the sulfonate complexed surfactant as 100%, sulfonate composite surface activity
Agent is made up of 5wt%-95wt% petroleum sulfonate and 95wt%-5wt% alkyl benzene sulfonate surfactant.
According to specific embodiment of the present invention, in the enhancing emulsifying combination flooding composition, it is preferable that the sulphur
Hydrochlorate complexed surfactant is by 50wt%-90wt% petroleum sulfonate and 50wt%-10wt% alkylbenzenesulfonate table
Face activating agent composition.
According to specific embodiment of the present invention, in the enhancing emulsifying combination flooding composition, it is preferable that the alkane
Base benzene sulfonate includes light alkylbenzenesulfonate or heavy alkylbenzene sulfonate；
It is highly preferred that the mean molecule quantity of the light alkylbenzenesulfonate is 337-357；
It is more preferred still that the mean molecule quantity of the heavy alkylbenzene sulfonate is 372-405.Wherein, it is light used in the present invention
Alkylbenzenesulfonate and heavy alkylbenzene sulfonate are this area conventional substances, and those skilled in the art can pass through conventional preparation
Method is prepared or is commercially available the light alkylbenzenesulfonate and heavy alkylbenzene sulfonate.
According to specific embodiment of the present invention, in the enhancing emulsifying combination flooding composition, it is preferable that described light
Alkylbenzenesulfonate is light sodium alkyl benzene sulfonate.
According to specific embodiment of the present invention, in the enhancing emulsifying combination flooding composition, it is preferable that described heavy
Alkylbenzenesulfonate is sodium heavy alkyl benzene sulfonate.
According to specific embodiment of the present invention, in the enhancing emulsifying combination flooding composition, it is preferable that the stone
The mean molecule quantity of oily sulfonate is 400-550, more preferably 430-530.
According to specific embodiment of the present invention, in the enhancing emulsifying combination flooding composition, it is preferable that the stone
Oily sulfonate includes one or more of combinations in mersolates, mahogany acid sylvite and mahogany acid ammonium salt；
It is highly preferred that the petroleum sulfonate is mersolates.
According to specific embodiment of the present invention, in the enhancing emulsifying combination flooding composition, it is preferable that described poly-
The mean molecule quantity of compound is 500-2500 ten thousand.
According to specific embodiment of the present invention, in the enhancing emulsifying combination flooding composition, it is preferable that described poly-
Compound includes one or more of combinations in polyacrylamide and salt-resistant polymer.
According to specific embodiment of the present invention, in the enhancing emulsifying combination flooding composition, it is preferable that the water
Sewage is injected for oil field；
It is highly preferred that the salinity of the oil field injection sewage is 3000-30000mg/L.
Present invention also offers the enhancing emulsifying combination flooding composition containing sulfosalt surfactant to adopt three times
Application in oil.
According to specific embodiments of the present invention, in the application, it is preferable that the tertiary oil recovery is answered including alkali-free binary
Close and drive oil recovery or Weak Base ASP Flood oil recovery.Wherein, when enhancing emulsifying combination flooding composition provided by the present invention contains
During weak base sodium carbonate, it is ternary (alkali/Surfactant/Polymer) combination flooding composition, available for Weak Base ASP Flood
Recover the oil；When the enhancing emulsifying combination flooding composition does not contain weak base sodium carbonate, it is binary (surfactant/polymerization
Thing) combination flooding composition, it can be used for alkali-free binary combination flooding oil recovery.By enhancing emulsifying combination flooding group provided by the present invention
Compound is used for weak base ternary or alkali-free binary combination flooding system, reaches enhancing system breast by sulfonate complexed surfactant
Change the purpose of performance, so as to improve the recovery ratio of tertiary oil recovery.
Chemical combined flooding was being developed in the past with surfactant flooding agent, and main consideration makes profit reach ultralow interface
Power, its emulsifiability less focusing on, desk research and field test show in recent years, in addition to interfacial tension is reduced, emulsibility
It is very big that recovery ratio influence can be improved on combination flooding, especially to weak base ASP ternary composite displacement systems and alkali-free SP binary combination flooding bodies
System, enhancing emulsification are favorably improved recovery ratio.It is difficult to realize in routine, single type surfactant and reaches ultralow
Interfacial tension has the purpose of stronger emulsifiability again, and the enhancing provided by the present invention containing sulfosalt surfactant emulsifies
Type combination flooding composition contains sulfonate complexed surfactant, and (petroleum sulfonate is answered with alkyl benzene sulfonate surfactant
With), with weak base or it is alkali free in the case of, can make oil water interfacial tension reach the ultralow order of magnitude (<1×10-2MN/m), simultaneously
The enhancing emulsifying combination flooding composition has stronger emulsion stability.It is demonstrated experimentally that the system has certain fit to profit
Ying Xing, system emulsified crude oil ability to function are strengthened, and laboratory core oil displacement efficiency is good.Meanwhile laboratory core oil displacement experiment shows,
Under the same conditions, the recovery ratio of enhancing emulsifying Weak Base ASP Flood formula provided by the present invention is than low-tension weak base
Ternary composite driving formula (this area use conventional combination flooding composition) it is high by 5.21%.
Embodiment
In order to which technical characteristic, purpose and the beneficial effect of the present invention is more clearly understood, 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.
Raw material is selected：
Petroleum sulfonate DPS series, the production of Daqing Refinery company；Petroleum sulfonate KPS series, Karamay, Xinjiang refinery
Company produces；Petroleum sulfonate FPS series, Fushun Petrochemical Company production, wherein, petroleum sulfonate DPS series, petroleum sulfonate
KPS series and petroleum sulfonate FPS series are mersolates.
Light alkylbenzenesulfonate LABS, mean molecule quantity 337-357；Heavy alkylbenzene sulfonate HABS, mean molecule quantity
For 372-405.
Polyacrylamide HPAM, the production of Daqing Refinery company, mean molecule quantity is 1500-2500 ten thousand.Salt-resistant polymer
KYPAM, Beijing perseverance dimerization plant produced, mean molecule quantity are 1500-2500 ten thousand.
Crude oil sample：North China Oilfield oil recovery factory dewatered oil, oil recovery factory of Karamay Oil Fields in Xinjiang dewatered oil.
Water sample：Sewage, salinity 9837mg/L inject in North China Oilfield oil recovery factory；Note oil recovery factory of Karamay Oil Fields in Xinjiang
Enter sewage, salinity 13293mg/L.
Interfacial tension tester uses TEXAS-500C spinning drop interfacial tensiometers, and interfacial tension test temperature is for oil reservoir
Layer temperature (North China Oilfield is 54 DEG C, and Karamay oilfield is 42 DEG C), the interfacial tension testing time is 2 hours stable equilibrium's values.
Emulsion stability (Ste) refer to that a certain amount of surfactant forms the stability of emulsion after making profit fully emulsified
Size, with the diversion ratio (f of emulsion in certain timev) calculate, the calculation formula of emulsion stability index is：Ste=1-
fv。
Embodiment 1
A series of enhancing emulsifying combination flooding compositions containing sulfosalt surfactant are present embodiments provided, wherein,
The enhancing emulsifying combination flooding composition includes ternary composite driving composition and binary combination flooding composition,
The ternary composite driving composition include sulfonate complexed surfactant (90wt% petroleum sulfonates DPS and
10wt% heavy alkylbenzene sulfonate HABS), polymer (HPAM 0.12wt%), sodium carbonate and the injection of North China Oilfield oil recovery factory it is dirty
Water；
The binary combination flooding composition include sulfonate complexed surfactant (90wt% petroleum sulfonates DPS and
10wt% heavy alkylbenzene sulfonate HABS), polymer (HPAM 0.12wt%) and North China Oilfield oil recovery factory injection sewage；Each group
Point content is shown in Table shown in 2-3.
The interfacial tension and system (binary, ternary system) emulsion stability of North China Oilfield profit sample are tested, it is specific to survey
Test result is see shown in table 1-3.
The petroleum sulfonate DPS of table 1 is as influence of the activating agent to North China crude oil/injection sewage interfacial tension (mN/m)
(HPAM 0.12wt%)
Influence of the sulfonate complexed surfactant (SSM1) of table 2 to North China crude oil/injection sewage interfacial tension (mN/m)
(HPAM 0.12wt%)
Wherein, sulfonate complexed surfactant (SSM1) described in table 2 is by 90wt% petroleum sulfonates DPS and 10wt%
Heavy alkylbenzene sulfonate HABS is formed.
The binary of table 3, the emulsion stability test result of ternary system
The as shown by data of table 1, single petroleum sulfonate DPS can make North China oil-water interfaces in alkali-free and weak base combination flooding formula
Tension force reaches ultralow, is not added with the conditions of alkali, can be that 0.1%-0.3% scopes reach ultralow interface in surfactant concentration
Power；Under the conditions of adding alkali, can be 0.2%-1.2% scopes in alkali concn, surfactant concentration be that 0.05%-0.3% scopes reach
To ultralow interfacial tension.
Equally, as seen from the data in Table 2, sulfonate complexed surfactant SSM1 also can be in alkali-free and weak base combination flooding formula
In North China oil water interfacial tension is reached ultralow, be not added with the conditions of alkali, can be 0.1%-0.3% scopes in surfactant concentration
Inside reach ultralow interfacial tension；Under the conditions of adding alkali, can be 0.2%-1.2% scopes in alkali concn, surfactant concentration be
0.05%-0.3% scopes reach ultralow interfacial tension.
From the compound system emulsifiability measurement result of table 3, single petroleum sulfonate DPS binary, tri compound
It is only respectively 5.28% and 5.65% to drive formula system emulsion stability index determining value, and sulfonate complexed surfactant
SSM1 binary, ternary composite driving formula system emulsion stability index determining value can respectively reach 19.43% and 21.33%.
As a result show that single petroleum sulfonate DPS emulsified crude oil ability is poor, and sulfonate complexed surfactant SSM1 emulsifications are former
Oiliness can be improved.
Embodiment 2
A kind of enhancing emulsifying combination flooding composition containing sulfosalt surfactant is present embodiments provided, wherein, should
It is ternary composite driving composition to strengthen emulsifying combination flooding composition,
The ternary composite driving composition include sulfonate complexed surfactant (90wt% petroleum sulfonates FPS and
The light alkylbenzenesulfonate LABS of 10wt%), polymer (KYPAM 0.12wt%), sodium carbonate and the injection of North China Oilfield oil recovery factory it is dirty
Water；Each component content is shown in Table shown in 5-6.
Test the interfacial tension and system (ternary system) emulsion stability of North China Oilfield profit sample, specific test result
See shown in table 4-6.
The petroleum sulfonate FPS of table 4 is as influence of the activating agent to North China crude oil/injection sewage interfacial tension (mN/m)
(KYPAM 0.12wt%)
Influence (KYPAM of the complexed surfactant of table 5 (SSM2) to North China crude oil/injection sewage interfacial tension (mN/m)
0.12wt%)
Wherein, complexed surfactant (SSM2) described in table 5 is by the light alkyl of 90wt% petroleum sulfonate FPS and 10wt%
Benzene sulfonate LABS is formed.
The emulsion stability test result of the ternary system of table 6
From the data of table 4 and table 5, petroleum sulfonate FPS and sulfonate complexed surfactant SSM2 weak base three
First combination flooding formula can make North China oil water interfacial tension reach ultralow, can be 0.2%-1.2% scopes, surface work in alkali concn
Property agent concentration be 0.05%-0.3% scopes reach ultralow interfacial tension.
From the three-component compound system emulsifiability measurement result of table 6, petroleum sulfonate FPS ternary composite drivings match somebody with somebody cube
It is that emulsion stability index determining value is only 6.72%, and sulfonate complexed surfactant SSM2 ternary composite driving matches somebody with somebody cube
It is that emulsion stability index can reach 22.66%.This shows that sulfonate complexed surfactant SSM2 emulsified crude oil performances obtain
To increasing substantially.
Embodiment 3
The enhancing emulsifying combination flooding composition containing sulfosalt surfactant is present embodiments provided, wherein, the enhancing
Emulsifying combination flooding composition includes ternary composite driving composition and binary combination flooding composition,
The ternary composite driving composition include sulfonate complexed surfactant (80wt% petroleum sulfonates KPS-1 and
20wt% heavy alkylbenzene sulfonate HABS), polymer (KYPAM 0.13wt%), sodium carbonate and Karamay Oil Fields in Xinjiang recover the oil
Sewage injects in factory；
The binary combination flooding composition includes complexed surfactant (80wt% petroleum sulfonates KPS-1 and 20wt%
Heavy alkylbenzene sulfonate HABS), polymer (KYPAM 0.13wt%) and oil recovery factory of Karamay Oil Fields in Xinjiang injection sewage；Respectively
Constituent content is shown in Table shown in 8-9.
Test the interfacial tension and system (binary, ternary system) stable emulsifying of Karamay Oil Fields in Xinjiang's profit sample
Property, specific test result is see shown in table 7-9.
The petroleum sulfonate KPS-1 of table 7 is as activating agent to Kelamayi Crude Oil/injection sewage interfacial tension (mN/m)
Influence (KYPAM 0.13wt%)
The sulfonate complexed surfactant (SSM3) of table 8 is to Kelamayi Crude Oil/injection sewage interfacial tension (mN/m) shadow
Ring (KYPAM 0.13wt%)
Wherein, complexed surfactant (SSM3) described in table 8 is by 80wt% petroleum sulfonates KPS-1 and 20wt% weight alkane
Base benzene sulfonate HABS is formed.
The binary of table 9, the emulsion stability test result of ternary system
From table 7 and the data of table 8, single petroleum sulfonate KPS-1 and sulfonate surfactants in combination flooding SSM3 are equal
Under alkali-free and weak base combination flooding formulation condition Karamay, Xinjiang oil water interfacial tension can be made to reach ultralow.
It is multiple from the compound system emulsifiability measurement result of table 9, single petroleum sulfonate KPS-1 binary, ternary
It is only respectively 7.19% and 7.67% to close and drive formula system emulsion stability index determining result, and sulfonate composite surface is active
Agent SSM3 binary, ternary composite driving formula system emulsion stability index determining value can respectively reach 27.93% and
28.71%.This shows that single petroleum sulfonate KPS-1 emulsified crude oil ability is poor, and sulfonate complexed surfactant SM3
Emulsified crude oil performance is improved.
Embodiment 4
A series of enhancing emulsifying combination flooding compositions containing sulfosalt surfactant are present embodiments provided, wherein,
The enhancing emulsifying combination flooding composition is ternary composite driving composition,
The ternary composite driving composition include sulfonate complexed surfactant (83wt% petroleum sulfonate KPS-2s and
The light alkylbenzenesulfonate LABS of 17wt%), polymer (KYPAM 0.13wt%), sodium carbonate and Karamay Oil Fields in Xinjiang recover the oil
Sewage injects in factory；Each component content is shown in Table shown in 10-11.
Test the interfacial tension and system (ternary system) emulsion stability of Karamay oilfield profit sample, specific test
As a result see shown in table 10-11.
The sulfonate complexed surfactant (SSM4) of table 10 is to Kelamayi Crude Oil/injection sewage interfacial tension (mN/m)
Influence (KYPAM 0.13wt%)
Wherein, sulfonate complexed surfactant (SSM4) described in table 10 by 83wt% petroleum sulfonate KPS-2s and
The light alkylbenzenesulfonate LABS compositions of 17wt%.
The emulsion stability test result of the ternary system of table 11
As seen from the data in Table 10, sulfonate complexed surfactant SSM4 Weak Base ASP Flood, which is matched somebody with somebody, can make a carat agate
Reach ultralow according to oil water interfacial tension, it can be 0.2%-1.2% scopes, surfactant concentration 0.05%- in alkali concn
0.3% scope reaches ultralow interfacial tension.
From the three-component compound system emulsifiability measurement result of table 11, petroleum sulfonate KPS-2 ternary composite driving is matched somebody with somebody
Cube system emulsion stability index determining value is only 7.36%, and sulfonate complexed surfactant SSM4 ternary composite driving is matched somebody with somebody
Cube system emulsion stability index can reach 30.32%.This shows sulfonate complexed surfactant SSM4 emulsified crude oils
It can be greatly improved.
The laboratory core oil displacement experiment of embodiment 5
1) core oil-displacement test method
Core oil-displacement test uses artificial conglomerate rock core, and the core diameter is 38mm, length is 150mm or so, and air oozes
Saturating rate is 200 × 10-3μm2.Oil displacement experiment profit is using oil recovery factory of Karamay Oil Fields in Xinjiang dewatered oil and injection sewage sample
Product.
Oil displacement experiment step：Rock core saturated oils first uses 0.05mL/min displacement velocity saturated oils, is used after oil breakthrough
The further saturated oils of 0.1mL/min, 0.2mL/min, 0.4mL/min displacement velocity.Then the water drive displacement of reservoir oil is carried out, water drive is to aqueous
When reaching 98%, change note ternary composite driving, composite displacement system injected slurry volume 0.5PV, reinject sequent water flooding and reach to aqueous
More than 98%.Record and water, crude oil amount and pressure change are flowed out in displacement process, calculate oil recovery factor.
2) core oil-displacement test result
The surfactant of low-tension Weak Base ASP Flood system uses the petroleum sulfonate KPS-1 samples in embodiment 3
Product, polymer use salt-resistant polymer KYPAM；Strengthen the surfactant of emulsifying Weak Base ASP Flood system using implementation
Sulfonate complexed surfactant SSM3 samples in example 3, polymer use salt-resistant polymer KYPAM.Oil displacement experiment result is shown in
Shown in table 12.
The core flooding test efficiency rating experimental result of table 12
As can be seen from Table 12, using petroleum sulfonate low-tension Weak Base ASP Flood rock core waterflood recovery efficiency factor
34.56%, turn the overall recovery factor 55.85% of water drive after injecting low-tension ternary composite driving, it is seen that note Weak Base ASP Flood carries
High recovery rate is 21.29%.And the enhancing emulsifying weak base tri compound provided by the present invention containing sulfosalt surfactant
The rock core waterflood recovery efficiency factor of drive is 35.37%, turns water overall recovery factor 61.87% after injecting the enhancing emulsifying ternary composite driving,
It can be seen that it is 26.50% that note enhancing emulsifying Weak Base ASP Flood, which improves recovery ratio, there is relatively strong breast in Germicidal efficacy to Produced Liquid
Change phenomenon.Contrast shows that the emulsifiability of enhancing emulsifying combination flooding formula can further improve the oil displacement efficiency of formula,
Under the same terms, the recovery ratio that enhancing emulsifying Weak Base ASP Flood formula improves is matched somebody with somebody than low-tension Weak Base ASP Flood
Fang Tigao recovery ratio is high by 5.21%.
Claims (10)
1. a kind of enhancing emulsifying combination flooding composition containing sulfosalt surfactant, combined with the enhancing emulsifying combination flooding
The gross weight of thing is 100% meter, and it includes：
Sulfonate complexed surfactant 0.05wt%-0.3wt%,
Polymer 0.1wt%-0.25wt%,
Sodium carbonate 0-1.2wt%,
Surplus is water；
Wherein, counted using the gross weight of the sulfonate complexed surfactant as 100%, the sulfonate complexed surfactant by
5wt%-95wt% petroleum sulfonate and 95wt%-5wt% alkyl benzene sulfonate surfactant composition；
Preferably, the sulfonate complexed surfactant by 50wt%-90wt% petroleum sulfonate and 50wt%-10wt%
Alkyl benzene sulfonate surfactant composition.
2. enhancing emulsifying combination flooding composition according to claim 1, it is characterised in that the alkylbenzenesulfonate bag
Include light alkylbenzenesulfonate or heavy alkylbenzene sulfonate；
Preferably, the mean molecule quantity of the light alkylbenzenesulfonate is 337-357；
It is further preferred that the mean molecule quantity of the heavy alkylbenzene sulfonate is 372-405.
3. enhancing emulsifying combination flooding composition according to claim 2, it is characterised in that the light alkylbenzenesulfonate
For light sodium alkyl benzene sulfonate.
4. enhancing emulsifying combination flooding composition according to claim 2, it is characterised in that the heavy alkylbenzene sulfonate
For sodium heavy alkyl benzene sulfonate.
5. enhancing emulsifying combination flooding composition according to claim 1, it is characterised in that the petroleum sulfonate is put down
Average molecular weight is 400-550, preferably 430-530.
6. enhancing emulsifying combination flooding composition according to claim 5, it is characterised in that the petroleum sulfonate includes
One or more of combinations in mersolates, mahogany acid sylvite and mahogany acid ammonium salt；
Preferably, the petroleum sulfonate is mersolates.
7. enhancing emulsifying combination flooding composition according to claim 1, it is characterised in that the average mark of the polymer
Son amount is 500-2500 ten thousand.
8. enhancing emulsifying combination flooding composition according to claim 7, it is characterised in that the polymer includes poly- third
One or more of combinations in acrylamide and salt-resistant polymer.
9. enhancing emulsifying combination flooding composition according to claim 1, it is characterised in that the water is that oil field injection is dirty
Water；
Preferably, the salinity of the oil field injection sewage is 3000-30000mg/L.
10. the enhancing emulsifying combination flooding composition containing sulfosalt surfactant described in claim any one of 1-9 is three
Application in secondary oil recovery；Preferably, the tertiary oil recovery includes alkali-free binary combination flooding oil recovery or Weak Base ASP Flood recovers the oil.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111334276A (en) * | 2020-03-10 | 2020-06-26 | 青岛金智瑞油气田开发技术发展有限公司 | Oil displacement agent and oil displacement method suitable for high-temperature low-salt oil reservoir |
| CN112011326A (en) * | 2020-09-09 | 2020-12-01 | 中国科学院兰州化学物理研究所 | Compound surfactant with ultralow oil-water interfacial tension and preparation method thereof |
| CN116240009A (en) * | 2022-11-18 | 2023-06-09 | 济南大学 | Surfactant for oil displacement and preparation method thereof |
| WO2024088444A1 (en) * | 2022-10-27 | 2024-05-02 | 中国石油天然气股份有限公司 | Middle-phase microemulsion, and preparation method therefor and use thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111334276A (en) * | 2020-03-10 | 2020-06-26 | 青岛金智瑞油气田开发技术发展有限公司 | Oil displacement agent and oil displacement method suitable for high-temperature low-salt oil reservoir |
| CN112011326A (en) * | 2020-09-09 | 2020-12-01 | 中国科学院兰州化学物理研究所 | Compound surfactant with ultralow oil-water interfacial tension and preparation method thereof |
| CN112011326B (en) * | 2020-09-09 | 2021-09-14 | 中国科学院兰州化学物理研究所 | Compound surfactant with ultralow oil-water interfacial tension and preparation method thereof |
| WO2024088444A1 (en) * | 2022-10-27 | 2024-05-02 | 中国石油天然气股份有限公司 | Middle-phase microemulsion, and preparation method therefor and use thereof |
| CN116240009A (en) * | 2022-11-18 | 2023-06-09 | 济南大学 | Surfactant for oil displacement and preparation method thereof |
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