CN105349130B - It is suitable for the diutan and surfactant composite oil-displacing system of high temperature and high salt oil deposit - Google Patents
It is suitable for the diutan and surfactant composite oil-displacing system of high temperature and high salt oil deposit Download PDFInfo
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- CN105349130B CN105349130B CN201510925450.6A CN201510925450A CN105349130B CN 105349130 B CN105349130 B CN 105349130B CN 201510925450 A CN201510925450 A CN 201510925450A CN 105349130 B CN105349130 B CN 105349130B
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- 239000004094 surface-active agent Substances 0.000 title claims abstract description 67
- 150000003839 salts Chemical class 0.000 title claims abstract description 40
- 239000002131 composite material Substances 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 26
- 238000011084 recovery Methods 0.000 claims abstract description 26
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L magnesium chloride Substances [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims abstract description 13
- 229910001629 magnesium chloride Inorganic materials 0.000 claims abstract description 13
- 239000011780 sodium chloride Substances 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 238000002360 preparation method Methods 0.000 claims abstract description 7
- 239000002736 nonionic surfactant Substances 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 9
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims description 7
- 229960003237 betaine Drugs 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- -1 dodecyl dimethyl hydroxypropyl Chemical group 0.000 claims description 7
- KWIUHFFTVRNATP-UHFFFAOYSA-N glycine betaine Chemical compound C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 claims description 7
- 229910001425 magnesium ion Inorganic materials 0.000 claims description 7
- 239000001110 calcium chloride Substances 0.000 claims description 6
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 6
- 230000003213 activating effect Effects 0.000 claims description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- 239000002280 amphoteric surfactant Substances 0.000 claims description 4
- QCCKPZOPTXCJPL-UHFFFAOYSA-N dodecyl(dimethyl)azanium;hydroxide Chemical compound [OH-].CCCCCCCCCCCC[NH+](C)C QCCKPZOPTXCJPL-UHFFFAOYSA-N 0.000 claims description 4
- 239000002202 Polyethylene glycol Substances 0.000 claims 1
- ZPIRTVJRHUMMOI-UHFFFAOYSA-N octoxybenzene Chemical compound CCCCCCCCOC1=CC=CC=C1 ZPIRTVJRHUMMOI-UHFFFAOYSA-N 0.000 claims 1
- 229920001223 polyethylene glycol Polymers 0.000 claims 1
- 230000015227 regulation of liquid surface tension Effects 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 5
- 238000005406 washing Methods 0.000 abstract description 3
- 239000002888 zwitterionic surfactant Substances 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 61
- 238000006073 displacement reaction Methods 0.000 description 18
- 229920000642 polymer Polymers 0.000 description 14
- 229920001285 xanthan gum Polymers 0.000 description 12
- 150000001875 compounds Chemical class 0.000 description 11
- 238000010586 diagram Methods 0.000 description 7
- 239000003292 glue Substances 0.000 description 7
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 239000003513 alkali Substances 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000004088 simulation Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- GJCOSYZMQJWQCA-UHFFFAOYSA-N 9H-xanthene Chemical compound C1=CC=C2CC3=CC=CC=C3OC2=C1 GJCOSYZMQJWQCA-UHFFFAOYSA-N 0.000 description 4
- 229920002527 Glycogen Polymers 0.000 description 4
- 239000010779 crude oil Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229940096919 glycogen Drugs 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000003643 water by type Substances 0.000 description 4
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 230000015784 hyperosmotic salinity response Effects 0.000 description 3
- 229920002401 polyacrylamide Polymers 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000011206 ternary composite Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000011218 binary composite Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 235000016068 Berberis vulgaris Nutrition 0.000 description 1
- 241000335053 Beta vulgaris Species 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical compound C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001459 mortal effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000230 xanthan gum Substances 0.000 description 1
- 229940082509 xanthan gum Drugs 0.000 description 1
- 235000010493 xanthan gum Nutrition 0.000 description 1
Classifications
-
- 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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/584—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific surfactants
-
- 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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/588—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific polymers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Lubricants (AREA)
Abstract
The invention discloses a kind of diutan for being suitable for high temperature and high salt oil deposit and surfactant composite oil-displacing system, it is made up of the component of following mass percent：Diutan 0.1% 0.5%, surfactant 0.05% 0.6%, remaining is mineralized water.The invention also discloses a kind of diutan for being suitable for high temperature and high salt oil deposit and the preparation method of surfactant composite oil-displacing system, step includes：Each component is taken by proportioning, by NaCl, CaCl under normal temperature2And MgCl2It is added to the water to stir and is prepared into mineralized water, then adds surfactant and diutan at normal temperatures, stir, produce the diutan for being suitable for high temperature and high salt oil deposit and surfactant composite oil-displacing system.Diutan and nonionic and zwitterionic surfactant all have preferable compatibility in the present invention, can keep the washing oil ability of displacing fluid, and can significantly increases swept volume, and then improves oil recovery factor.
Description
Technical field
The present invention relates to field of oilfield chemistry, especially a kind of diutan and surface-active for being suitable for high temperature and high salt oil deposit
Agent composite oil-displacing system.
Background technology
The exploitation of oil is divided into three phases：It is initially to be exploited by the natural energy on stratum, referred to as primary oil recovery,
General recovery ratio is 5%~10%；After natural energy exhaustion, it can continue to exploit by artificial recharge or gas injection, referred to as two
Secondary oil recovery, recovery ratio can bring up to 30%~40%；After secondary oil recovery, the remaining oil for still having 60%~70% remains in ground
Under, physics and the method for chemistry can only be relied on to be exploited, referred to as tertiary oil recovery.Tertiary oil recovery method mainly has heating power to drive, is mixed
Mutually drive, chemical flooding and microorganism drive etc..
The chemical displacement of reservoir oil, a series of physical chemical reaction exactly occurs with reservoir fluid by injecting the chemical agent of underground, from
And by oil, more effectively displacement comes out, and improves oil recovery.Early in the seventies of last century six, people have just started chemistry
The desk research of flooding tertiary oil recovery technology.Successively occur alkali drive, active water drive, polymer flooding and its binary developed,
Ternary oil displacement system.There is the ternary composite displacement system of alkali, i.e. " polymer+surfactant+alkali ", although improving recovery ratio side
Face receives positive effect, but because in the resource for being adapted to chemical flooding, calcium, magnesium ion in more than 80% block stratum water contain
Amount is high, and abundant calcium, magnesium are combined generation precipitation with the alkali in ternary composite driving.Serious scale problems turn into ternary composite driving skill
The mortal wound that art is promoted.Gradual people start sight to turn to " polymer+surfactant " alkali-free binary combination flooding oil body
The research of system.Surfactant and polymer binary composite oil-displacing system, one side polymer can expand the ripple of oil displacement system
And volume, another aspect surfactant can improve oil displacement efficiency., will to improving oil recovery factor if both compatibilities are good
Have broad application prospects.Hydrolyzed polyacrylamide (HPAM) turns into a kind of conventional important polymerization for being used for improving aqueous viscosity
Thing, but go deep into research, it is found that its heat and salt resistance is poor, under the conditions of high temperature and high salt, the viscosity loss of system is serious,
And in the migration process of underground, by the shear action in underground duct, strand can be broken, and cause the reduction of system viscosity.For
This, has researcher to propose to utilize hydrophobically modified polymers, carries high molecular temperature-resistant anti-salt performance, but drawing due to hydrophobic grouping
Enter, can cause to hardly result in molecular weight product high as polyacrylamide, or obtained the product of HMW, due to
The introducing of a large amount of hydrophobic groupings, the water-soluble of molecule are deteriorated again.Meanwhile hydrophobic associated polymer also presence is matched somebody with somebody with surfactant
The problem of in terms of 5 property.As the oil reservoir under the harsh conditions such as progress, high temperature, high salt of oil field development suddenly needs suitable drive
Oil systems.Therefore, develop that a kind of compatibility is good, there is high temperature resistant, new polymers/surfactant binary displacement oil body of high salt
System, the exploitation for oil field have great importance.
The content of the invention
The purpose of the present invention is to overcome above-mentioned the deficiencies in the prior art, there is provided a kind of to be suitable for determining for high temperature and high salt oil deposit
Excellent glue and surfactant composite oil-displacing system, the system have good compatibility, while have the characteristic of resistance to gentle salt resistance.
To achieve the above object, the present invention uses following technical proposals：
A kind of diutan for being suitable for high temperature and high salt oil deposit and surfactant composite oil-displacing system, by following quality percentage
The component composition of ratio：Diutan 0.1%-0.5%, surfactant 0.05%-0.6%, remaining is mineralized water.
Preferably, the composite oil-displacing system, it is made up of the component of following mass percent：Diutan 0.15~0.2%,
Surfactant 0.05~0.3%, remaining is mineralized water.
Preferably, the surfactant is the mixture of amphoteric surfactant and nonionic surface active agent, matter
Amount is than being 75:25~25:75.
Preferably, the mass ratio of the amphoteric surfactant and nonionic surface active agent is 50:50.
Preferably, the amphoteric surfactant activating agent is alkylpolyoxyethylene glycine betaine, dodecyl two
One kind in methylhydroxypropyl sulfobetaines, empgen BB or dodecyldimethylammonium hydroxide inner salt.
Preferably, the nonionic surfactant activating agent is Value 3608 (TX-100) or alkyl
Phenol polyethenoxy (10) ether (OP-10).
Preferably, the mineralized water is by NaCl, CaCl2And MgCl2It is formulated, total salinity 244121mgL-1,
Wherein Na+、Mg2+、Ca2+And Cl-Concentration be respectively 95373,102,411 and 148235mgL-1；
The invention also discloses a kind of diutan for being suitable for high temperature and high salt oil deposit and surfactant composite oil-displacing system
Preparation method, step includes：
Each component is taken by proportioning, by NaCl, CaCl under normal temperature2And MgCl2It is added to the water to stir and is prepared into mineralized water,
Then surfactant and diutan are added at normal temperatures, is stirred, produce the diutan that is suitable for high temperature and high salt oil deposit and
Surfactant composite oil-displacing system.
According to the present invention, the diutan for being suitable for high temperature and high salt oil deposit and surfactant composite oil-displacing system application
During the tertiary oil recovery of oil exploitation.
The beneficial effects of the invention are as follows：
(1) present invention has extraordinary Efficient Adhesive Promotion from diutan, and its apparent viscosity will be considerably higher than xanthans
System, higher than HPAM systems, and with after surfactant compound, salt tolerant effect is good.This is primarily due to the main chain of diutan
The sugared ring element for-O- key connections of serving as reasons, at the same on strand in each repeat unit also containing one by two glycogen length
Side chain ,-COO- groups are located in the repeat unit of molecular backbone, and do not have electrically charged group in side chain, so working as diutan
Macromolecular chain dissolved in surfactant and mineralized water after, the strand of diutan can mutually twine with surfactant
Around the side chain of diutan can play certain protective effect to the charged group on main chain and surfactant, so that fixed excellent
Xanthan molecule and surfactant molecule produce synergy, and under the conditions of higher than 90 DEG C, oil displacement system remains to keep certain viscous
Degree, so that its salt tolerance greatly improves, although xanthan molecules and being made up of the main chain and side chain of glycogen, its
Contain two-COO- groups on side chain, it is easier to influenceed by salt, its salt resistant character is had a greatly reduced quality.
(2) under the conditions of high temperature and high salt, the linear viscoelastic region of diutan system is apparent, and its viscoplasticity will be significantly
It is better than xanthans and HPAM.There are substantial amounts of-OH and a number of-COO- bases from the point of view of the structure of diutan, on its strand
Group, such hydrophilic group structure and nonionic and zwitterionic surfactant all have preferable compatibility.
(3) synergy is produced between diutan and surfactant compound system used, both are compound can produce it is excellent
In the effect of both unitary systems, while system viscosity higher is kept, the relatively low interface of surfactant is maintained again
Power so that diutan/surfactant binary system can keep the washing oil ability of displacing fluid in oil displacement process, and and can is big
Its swept volume of the increase of amplitude, and then improve oil recovery factor.
Brief description of the drawings
Fig. 1 is diutan molecular structure；
It in salinity is 244121mgL that Fig. 2, which is,-1, temperature is respectively 0.175% polymer under the conditions of 25 and 90 DEG C
Solution viscosity with shear rate variation diagram；Diutan gum, xanthan gum and HPAM respectively specify that excellent glue, xanthan in figure
Glue and partially hydrolyzed polyacrylamide (PHPA)；
Fig. 3 is that salinity is 244121mgL-1, under the conditions of 90 DEG C, 0.175% polymer solution system composite modulus
(figure A) storage modulus G ' and loss modulus G " (figure B) are with the variation diagram of stress；
Fig. 4 is that salinity is 244121mgL-1, under the conditions of 90 DEG C, the dodecyl beet of 0.175% polymer/0.3%
Alkali/0.2%OP-10 compound systems apparent viscosity (A) and shear stress (B) with shear rate variation diagram；
Fig. 5 is that salinity is 244121mgL-1, under the conditions of 90 DEG C, the dimethyl of 0.15% polymer/0.05%
Base hydroxypropyl sulfobetaines/solution combined modulus of 0.05%TX-100 compound systems is with the variation diagram (figure A) of stress and energy storage
Modulus G ' and loss modulus G " with frequency of oscillation variation diagram (figure B)；
Fig. 6 is that salinity is 244121mgL-1, under the conditions of 90 DEG C, the dimethyl of 0.175% polymer/0.1%
Base glycine betaine/0.1%OP-10 compound systems interfacial tension with surfactant concentration variation diagram；
Fig. 7 is that salinity is 244121mgL-1, under the conditions of 90 DEG C, the dodecyl polyoxy of 0.175% polymer/0.15%
The accumulative recovery ratio of vinethene glycine betaine/0.15%TX-100 compound systems is with the variation diagram for injecting PV numbers.
Embodiment
The present invention is further described with reference to the accompanying drawings and examples.
The surfactant used in the present embodiment is commercially available prod, and product purity rank is pure for chemistry；What is used determines
Excellent glue provides for Cp Kelco U. S. Inc. of the U.S., purity 98%, and molecular weight is 5.2 × 106g·mol-1, inherent viscosity is
5450mL·g-1.Crude oil sample used in laboratory simulation flooding experiment is Henan Oil Field common heavy oil, and acid value for crude oil is
1.361mgKOH/g viscosity 254mPas.
Embodiment 1
A kind of diutan for being suitable for high temperature and high salt oil deposit and surfactant composite oil-displacing system, by following quality percentage
The component composition of ratio：Diutan 0.15%, wherein surfactant 0.1%, dodecyl dimethyl hydroxypropyl sulfobetaines
Account for 0.05%, TX-100 and account for 0.05%, remaining is mineralized water, and the mineralized water is by NaCl, CaCl2And MgCl2It is formulated, always
Salinity is 244121mgL-1, wherein Na+、Mg2+、Ca2+And Cl-Concentration be respectively 95373,102,411 and
148235mg·L-1。
Preparation method is as follows：By NaCl, CaCl under normal temperature2And MgCl2It is added to the water to stir and is prepared into mineralized water, so
Afterwards at normal temperatures by 0.05g dodecyl dimethyl hydroxypropyl sulfobetaines, 0.05g TX-100 and 0.15g it is fixed excellent
Glue is added in 99.75g mineralized waters, is stirred, and produces the diutan for being suitable for high temperature and high salt oil deposit and surfactant is answered
Close oil displacement system.
Laboratory simulation flooding is tested, and after water drive to fill out sand tube is not fuel-displaced, oil displacement experiment is further carried out using the system,
When the injection rate of the system is 0.5PV, recovery ratio can improve 36.8% on the basis of water drive.
Embodiment 2
A kind of diutan for being suitable for high temperature and high salt oil deposit and surfactant composite oil-displacing system, by following quality percentage
The component composition of ratio：Diutan 0.2%, surfactant 0.3%, wherein alkylpolyoxyethylene glycine betaine account for
0.15%, TX-100 account for 0.15%, and remaining is mineralized water, and the mineralized water is by NaCl, CaCl2And MgCl2It is formulated, total ore deposit
Change degree is 244121mgL-1, wherein Na+、Mg2+、Ca2+And Cl-Concentration be respectively 95373,102,411 and 148235mg
L-1。
Preparation method is as follows：By NaCl, CaCl under normal temperature2And MgCl2It is added to the water to stir and is prepared into mineralized water, so
The diutan of 0.15g alkylpolyoxyethylene glycine betaine, 0.15g TX-100 and 0.2g is added at normal temperatures afterwards
In 99.5g mineralized waters, stir, produce the diutan for being suitable for high temperature and high salt oil deposit and surfactant combination flooding oil body
System.
Laboratory simulation flooding is tested, and after water drive to fill out sand tube is not fuel-displaced, oil displacement experiment is further carried out using the system,
When the injection rate of the system is 0.5PV, recovery ratio can improve 44.2% on the basis of water drive.
Embodiment 3
A kind of diutan for being suitable for high temperature and high salt oil deposit and surfactant composite oil-displacing system, by following quality percentage
The component composition of ratio：Diutan 0.175%, wherein surfactant 0.2%, dodecyldimethylammonium hydroxide inner salt account for 0.1%,
OP-10 accounts for 0.1%, and remaining is mineralized water, and the mineralized water is by NaCl, CaCl2And MgCl2It is formulated, total salinity is
244121mg·L-1, wherein Na+、Mg2+、Ca2+And Cl-Concentration be respectively 95373,102,411 and 148235mgL-1。
Preparation method is as follows：By NaCl, CaCl under normal temperature2And MgCl2It is added to the water to stir and is prepared into mineralized water, so
The diutan of 0.1g dodecyldimethylammonium hydroxide inner salt, 0.1g OP-10 and 0.175g is added at normal temperatures afterwards
In 99.625g mineralized waters, stir, produce the diutan for being suitable for high temperature and high salt oil deposit and surfactant combination flooding oil body
System.
Laboratory simulation flooding is tested, and after water drive to fill out sand tube is not fuel-displaced, oil displacement experiment is further carried out using the system,
When the injection rate of the system is 0.5PV, recovery ratio can improve 37.2% on the basis of water drive.
Embodiment 4
A kind of diutan for being suitable for high temperature and high salt oil deposit and surfactant composite oil-displacing system, by following quality percentage
The component composition of ratio：Diutan 0.5%, wherein surfactant 0.5%, empgen BB account for 0.3%, OP-10 and accounted for
0.2%, remaining is mineralized water, and the mineralized water is by NaCl, CaCl2And MgCl2It is formulated, total salinity 244121mg
L-1, wherein Na+、Mg2+、Ca2+And Cl-Concentration be respectively 95373,102,411 and 148235mgL-1。
Preparation method is as follows：By NaCl, CaCl under normal temperature2And MgCl2It is added to the water to stir and is prepared into mineralized water, so
The diutan of 0.3g empgen BB, 0.2g OP-10 and 0.5g is added in 99g mineralized waters at normal temperatures afterwards,
Stir, produce the diutan for being suitable for high temperature and high salt oil deposit and surfactant composite oil-displacing system.
Laboratory simulation flooding is tested, and after water drive to fill out sand tube is not fuel-displaced, oil displacement experiment is further carried out using the system,
When the injection rate of the system is 0.5PV, recovery ratio can improve 34.7% on the basis of water drive.
As shown in Fig. 2 diutan has extraordinary Efficient Adhesive Promotion, temperature is 25 DEG C, shear rate 7s-1When, it is fixed excellent
Glue is often suitable with HPAM apparent viscosity with oil field, to be considerably higher than the viscosity of xanthans, and when temperature is increased to 90 DEG C,
The apparent viscosity of diutan system will be considerably higher than xanthans system, higher than HPAM systems.This result absolutely proves life
Thing colloid will be significantly stronger than HPAM systems in terms of tying up to Efficient Adhesive Promotion, meanwhile, the effect of diutan is also better than xanthans.This
The main chain for being primarily due to diutan is served as reasons the sugared ring element of-O- key connections, while is also contained in each repeat unit on strand
There is a side chain by two glycogen length, in molecular backbone repeat unit, containing-COO- a group, and do not have in side chain
Electrically charged group, so, after the macromolecular chain of diutan dissolves in surfactant and mineralized water, strand and surface
Activating agent is mutually wound, and side chain can play certain protective effect to the charged group on main chain, under the conditions of higher than 90 DEG C, is driven
Remain to keep certain viscosity by system, so that its salt tolerance greatly improves, although xanthan molecules and by glycogen
Main chain and side chain composition, but contain two-COO- groups on its side chain, it is easier to influenceed by salt, make its salt tolerance
It can have a greatly reduced quality.
As shown in figure 3, under the conditions of high temperature and high salt, the linear viscoelastic region of diutan system is apparent, its viscoplasticity
Xanthans and HPAM are significantly stronger than, illustrates that diutan has extraordinary temperature-resistant anti-salt performance, under the conditions of high temperature and high salt,
Still there is fairly obvious viscoplasticity, this is highly important property for oil displacement system.Come from the structure of diutan
See there is substantial amounts of-OH and a number of-COO- groups, such hydrophilic group structure and nonionic and both sexes on its strand
Ionic surface active agent all has preferable compatibility.
As shown in Figure 4 and Figure 5, after diutan compounds with both sexes and nonionic surfactant, system still has fixed excellent
The resistance to gentle anti-salt property of colloid system, shows stronger viscous-elastic behaviour.
As shown in fig. 6, diutan and surfactant compound, multiple when surfactant concentration is 0.1%~0.3%
The interfacial tension of zoarium system is minimum, reaches 10-2mN·m-1The order of magnitude, although being not reaching to 10-3~10-4So ultralow quantity
Level, but in 90 DEG C of high temperature, salinity 244121mgL-1It is not easy that condition is issued to so low interfacial tension.
Fig. 7 gives the change of the recovery ratios of different oil displacement systems with injection PV numbers, its Crude Oil select for Henan
Oil field common heavy oil, acid value for crude oil 1.361mgKOH/g, viscosity 254mPas, it can be seen that in binary composite oil-displacing system,
The recovery ratio of diutan/surfactant system is also above xanthans/surfactant system and HPAM/ surfactant bodies
The recovery ratio of system.This is primarily due in the system of investigation, the viscosity highest of diutan/surfactant system, in the displacement of reservoir oil
During can effectively improve displacing fluid swept volume, more reduce the residual oil in duct, improve oil recovery factor.
Under the conditions of high temperature and high salt, diutan/surfactant system still has higher oil recovery factor, and it is fixed to be mainly still attributed to the fact that
Synergy between excellent glue and surfactant compound system used, both are compound can to produce better than both unitary systems
Effect, i.e., while system viscosity higher is kept, the relatively low interfacial tension of surfactant is maintained again so that diutan/
Surfactant system can keep the washing oil ability of displacing fluid in oil displacement process, and and can significantly increases it and involves body
Product, and then improve oil recovery factor.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
The present invention is described in detail, it will be understood by those within the art that：It still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic；And these modification or
Replace, the essence of appropriate technical solution is departed from the scope of various embodiments of the present invention technical scheme.
Claims (4)
1. a kind of diutan for being suitable for high temperature and high salt oil deposit and surfactant composite oil-displacing system, it is characterized in that, by following
The component composition of mass percent：Diutan 0.1%-0.5%, surfactant 0.05%-0.6%, remaining is mineralized water；Table
Face activating agent is amphoteric surfactant and nonionic surface active agent mass ratio is 75:25~25:75 mixture；Both sexes
Surfactant activity agent is alkylpolyoxyethylene glycine betaine, dodecyl dimethyl hydroxypropyl sulfobetaines, ten
One kind in dialkyl group glycine betaine or dodecyldimethylammonium hydroxide inner salt；Nonionic surfactant activating agent is polyethyleneglycol
Octyl phenyl ether or alkylphenol-polyethenoxy (10) ether；Mineralized water is by NaCl, CaCl2And MgCl2It is formulated, total salinity is
244121mg·L-1, wherein Na+、Mg2+、Ca2+And Cl-Concentration be respectively 95373,102,411 and 148235mgL-1。
2. a kind of diutan for being suitable for high temperature and high salt oil deposit as claimed in claim 1 and surfactant combination flooding oil body
System, it is characterized in that, it is made up of the component of following mass percent：Diutan 0.15~0.2%, surfactant 0.05~
0.3%, remaining is mineralized water.
3. a kind of diutan for being suitable for high temperature and high salt oil deposit as claimed in claim 1 and surfactant composite oil-displacing system
Preparation method, it is characterized in that, step is as follows：Each component is taken by proportioning, by NaCl, CaCl under normal temperature2And MgCl2It is added to the water
Stir and be prepared into mineralized water, then add surfactant and diutan at normal temperatures, stir, produce and be suitable for height
The diutan and surfactant composite oil-displacing system of warm high salinity reservoir.
4. the diutan for being suitable for high temperature and high salt oil deposit and surfactant complex oil displacing as described in claim any one of 1-2
Application of the system during the tertiary oil recovery of oil exploitation.
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| CN107325798B (en) * | 2017-06-13 | 2019-08-13 | 中国石油集团渤海钻探工程有限公司 | High temperature resistant anti-salt high-density insulating liquid and preparation method thereof |
| CN111484834A (en) * | 2020-04-21 | 2020-08-04 | 张星昊 | Preparation method of liquid flow pattern regulator containing diutan |
| CN115124986A (en) * | 2021-03-26 | 2022-09-30 | 中国石油化工股份有限公司 | Composite oil displacement system and preparation method and application thereof |
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| CN101675141A (en) * | 2007-02-08 | 2010-03-17 | 哈利伯顿能源服务公司 | Comprise the treatment solution and the methods involving of excellent glue surely |
| CN102858883A (en) * | 2010-02-12 | 2013-01-02 | 罗地亚管理公司 | Rheology Modifier Compositions And Methods Of Use |
| CN103384711A (en) * | 2011-02-16 | 2013-11-06 | 温特沙尔控股有限公司 | Method for extracting crude oil from crude oil reservoirs with a high reservoir temperature |
| CN105038752A (en) * | 2015-06-16 | 2015-11-11 | 中国石油化工股份有限公司 | Compound oil-displacing agent for high temperature reservoir and compound oil-displacing system |
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| CN101675141A (en) * | 2007-02-08 | 2010-03-17 | 哈利伯顿能源服务公司 | Comprise the treatment solution and the methods involving of excellent glue surely |
| CN102858883A (en) * | 2010-02-12 | 2013-01-02 | 罗地亚管理公司 | Rheology Modifier Compositions And Methods Of Use |
| CN103384711A (en) * | 2011-02-16 | 2013-11-06 | 温特沙尔控股有限公司 | Method for extracting crude oil from crude oil reservoirs with a high reservoir temperature |
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