CN109880607A - A kind of binary displacement oil agent and its application - Google Patents
A kind of binary displacement oil agent and its application Download PDFInfo
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- CN109880607A CN109880607A CN201910229130.5A CN201910229130A CN109880607A CN 109880607 A CN109880607 A CN 109880607A CN 201910229130 A CN201910229130 A CN 201910229130A CN 109880607 A CN109880607 A CN 109880607A
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Abstract
A kind of binary displacement oil agent of the invention belongs to oil field development technical field, is by 55~60 parts of amphoteric surfactant, 36~39 parts of water, 1~5 part of cosolvent, 2~6 parts of wetting agent are made；Its formula system, by weight percentage mainly consist of the following components: binary displacement oil agent is that 0.025 ~ 0.4%, polyacrylamide polymers are 0.05 ~ 0.25%, excess water.In binary displacement oil agent provided by the invention, each component is under synergistic effect, it is not necessary that alkali is added, thus it is possible to vary wetability reduces oil water interfacial tension to 10‑3The mN/m order of magnitude, to improve oil recovery factor.Have many advantages, such as that environmentally protective, usage amount is small, good water solubility, cheap compared with traditional chemical surfactant oil displacement system, and preparation method is easy, practical, remarkable in economical benefits, no pollution to the environment in production process.
Description
Technical field
The invention belongs to oil field development technical fields, and in particular to a kind of binary displacement oil agent and its application.
Background technique
Traditional primary oil recovery and secondary oil recovery, can only generally produce the 30%~40% of crude oil original vol, remaining oil is not with
Continuous oil clot, which is enclosed, catches in the hole of reservoir rocks, at this time aqueous 85%~90% in Produced Liquid.For this purpose, there are about 60%~70%
Crude oil can only be exploited by other physics and chemical method, such exploitation is referred to as tertiary oil recovery.
With the exploitation of the 70's tertiary oil recovery technology, only chemical flooding just develops three kinds of technologies: surfactant
Drive, polymer flooding and caustic waterflooding.The mechanism of surfactant and caustic flooding be based on forming ultralow interfacial tension, and
Single polymer injection or injection surfactant after again injection of polymer, then be control fluidity, adopted to also just improve crude oil
Yield.The buck being injected into oil reservoir be present in hydro carbons in petroleum spread out in fatty acid chemically react, be formed in situ rouge
Fat acid sodium-salt, these surfactants promote to form ultralow interfacial tension.
What is generallyd use at present does not avoid clay caused by the ternary composite oil-displacing system containing alkali from falling off, set from rock surface
Standby and pipeline forms alkali dirt deposition object, and corrosion pipeline equipment or even destruction stratum capillary structure etc. have influenced tertiary oil recovery
Work, the alkali free binary combination flooding technology of Surfactant/Polymer becomes research hotspot.It will under conditions of alkali-free
Crude oil/water is down to ultralow interfacial tension (10 -3 The mN/m order of magnitude and following) index Surfactant propose it is very high
It is required that the surfactants such as traditional petroleum sulfonate used at present, heavy alkylbenzene sulfonate are all unable to satisfy needs, because
It is under the conditions of alkali-free, it is more difficult to the oil-water interfacial tension of surfactant solution be made to be down to 10 -3The mN/m order of magnitude, Er Qieshi
Oily sulfonate belongs to common anion surfactant, and resistance to hard water and salt resistant character are poor, also larger using concentration.Glycine betaine
Type amphoteric surfactant has excellent application performance, there is good salt-resistance, temperature resistance, low adsorption loss, emulsibility
And compatibility, it can be suitably used for high salinity and low permeability pay, there is vast potential for future development.
From the point of view of the development trend of surfactant flooding, not single surfactant flooding, various chemistry at
It is combined with each other between part.Especially for high temperature, the oil reservoir of high salinity, single use surfactant flooding there is
The disadvantages of activating agent sweep efficiency is low, oil displacement efficiency is poor, adsorption loss is serious, at high cost.Therefore, people are logical in actually recovering the oil
It crosses between variety classes surfactant and auxiliary agent or variety classes surfactant and is reasonably compounded, but the prior art
In, it is not ideal enough there is ultralow interfacial tension is formed.
Summary of the invention
The purpose of the present invention overcomes the defect of the above-mentioned prior art, provides a kind of at low cost, preferable binary drive of stability
Finish easily forms lower tension value to oil-water interfaces using it, to improve oil recovery factor.
A kind of binary displacement oil agent of the invention, is made in parts by weight of following component: amphoteric surfactant 55~
60 parts, 36~39 parts of water, 1~5 part of cosolvent, 2~6 parts of wetting agent.
As a further improvement of the present invention, the amphoteric surfactant is erucyl amide propyl betaine, 18
In alkyl hydroxy propylsultaine glycine betaine, Cocoamidopropyl betaine or cocamidopropyl propyl amide hydroxyl sulfo betaine it is a kind of or
A variety of arbitrary proportion mixing.
As a further improvement of the present invention, the cosolvent is isopropanol, one or two kinds of arbitrary proportions in n-butanol
Mixing.
As a further improvement of the present invention, the wetting agent is lecithin, in fatty acid, alkyl phenol polyoxyethylene ether
One or more component arbitrary proportion mixing.
The formula system of a kind of binary displacement oil agent of the invention in DP technology, by weight percentage mainly by with the following group
It is grouped as:
(1) binary displacement oil agent is 0.025~0.4 %；
(2) polyacrylamide polymers are 0.05~0.25%；
(3) excess water；
Above-mentioned polyacrylamide polymers, concentration are 1200 mg/L, and molecular weight is 1000~15,000,000.
In binary displacement oil agent provided by the invention, each component is under synergistic effect, it is not necessary that alkali is added, thus it is possible to vary wetting
Property, reduce oil water interfacial tension to 10-3The mN/m order of magnitude, to improve oil recovery factor.It is driven with traditional chemical surfactant
Oil systems preparation method simplicity, are cut compared to having many advantages, such as that environmentally protective, usage amount is small, good water solubility, cheap
Real feasible, remarkable in economical benefits, no pollution to the environment in production process.Cosolvent is added in system, increases between each ingredient
Solubility property, improve stability, while be completely dissolved in oil displacement agent can more in crude oil, play displacement of reservoir oil effect.Wetting agent tool
There is chemical inertness, be generally not involved in the chemical reaction of system, resistance to acid and alkali is good, while can increase rock wettability, improves
Displacement efficiency.
Specific embodiment
Embodiment 1
The present embodiment provides a kind of binary displacement oil agent and its applications, and in parts by weight, material component includes:
60 parts of amphoteric surfactant (erucyl amide propyl betaine: octadecyl hydroxypropyl sulfobetaine: coconut oleoyl amine
Hydroxysultaine=1:1:1)；
39 parts of water；
1 part of cosolvent (isopropanol)；
2 parts of wetting agent (lecithin, fatty acid, alkyl phenol polyoxyethylene ether=1:1:1)；
The above material is stirred, is uniformly mixed to get binary displacement oil agent.
Using effect: binary displacement oil agent obtained above is added in stratum injection water by different quality concentration ratio, and
It is 10,000,000 that molecular weight, which is added, and concentration is 1200 mg/L polyacrylamide polymers, is stirred evenly at room temperature to get alkali-free two
First oil displacement system carries out interfacial tension experiment test at 45 DEG C, and test result is shown in Table 1:
1 alkali-free binary oil displacement system of table is with different quality concentration than the dynamical interfacial tension in 120min
Embodiment 2
The present embodiment provides a kind of binary displacement oil agent and its applications, and in parts by weight, material component includes:
55 parts of amphoteric surfactant (Cocoamidopropyl betaine: cocamidopropyl propyl amide hydroxyl sulfo betaine=2:1)；
36 parts of water；
6 parts of cosolvent (n-butanol)；
3 parts of wetting agent (lecithin, fatty acid, alkyl phenol polyoxyethylene ether=1:1:1)
The above material is stirred, is uniformly mixed to get binary displacement oil agent.
Using effect: binary displacement oil agent obtained above is added in stratum injection water by different quality concentration ratio, and
It is 10,000,000 that one's share of expenses for a joint undertaking amount, which is added, and concentration is 1200 mg/L polyacrylamide polymers, is stirred evenly at room temperature to get alkali-free two
First oil displacement system carries out interfacial tension experiment test at 45 DEG C, and test result is shown in Table 2:
2 alkali-free binary oil displacement system of table is with different quality concentration than the dynamical interfacial tension in 120min
Embodiment 3
A kind of binary displacement oil agent of the invention, in parts by weight, material component includes:
57 parts of amphoteric surfactant (erucyl amide propyl betaine: octadecyl hydroxypropyl sulfobetaine: coconut oleoyl amine
Propyl betaine=2:1:2)；
38 parts of water；
3 parts of cosolvent (isopropanol: n-butanol=1:1)
4 parts of wetting agent (lecithin, fatty acid, alkyl phenol polyoxyethylene ether=1:1:1)
The above material is stirred, is uniformly mixed to get binary displacement oil agent.
Using effect: binary displacement oil agent obtained above is added in stratum injection water by different quality concentration ratio, and
It is 10,000,000 that molecular weight, which is added, and concentration is 1200 mg/L polyacrylamide polymers, is stirred evenly at room temperature to get alkali-free two
First oil displacement system carries out interfacial tension experiment test at 45 DEG C, and test result is shown in Table 3:
3 alkali-free binary oil displacement system of table is with different quality concentration than the dynamical interfacial tension in 120min
Embodiment 4
A kind of binary displacement oil agent of the invention, by erucyl amide propyl betaine, octadecyl hydroxypropyl sulfobetaine, coconut palm
Oleamide propyl betaine and cocamidopropyl propyl amide hydroxyl sulfo betaine are compounded with cosolvent respectively constitutes binary displacement oil agent, with
Parts by weight meter, raw material components include:
57 parts of amphoteric surfactant；
37 parts of water；
5 parts of cosolvent (isopropanol: n-butanol=1:1)
5 parts of wetting agent (lecithin, fatty acid, alkyl phenol polyoxyethylene ether=1:1:1)
The above material is stirred, is uniformly mixed to get binary displacement oil agent.
Binary displacement oil agent obtained above is added in stratum injection water by different quality concentration ratio, and molecular weight is added
It is 10,000,000, concentration is 1200 mg/L polyacrylamide polymers, it is stirred evenly at room temperature to get alkali-free binary oil displacement system,
Interfacial tension experiment test is carried out at 45 DEG C, test result is shown in Table 4:
The different individually surfactant oil displacement system dynamical interfacial tensions of table 4
Embodiment 5
56 parts of amphoteric surfactant (Cocoamidopropyl betaine: cocamidopropyl propyl amide hydroxyl sulfo betaine=2:1)；Water
38 parts；4 parts of cosolvent (n-butanol)；4 parts of wetting agent (lecithin, fatty acid, alkyl phenol polyoxyethylene ether=1:1:1), will more than
Material is stirred, and is uniformly mixed to get binary displacement oil agent.Binary displacement oil system concentration is 0.15wt%, experimental temperature 49
℃.Displacement velocity is 0.3mL/min.It is used for the recovery ratio such as table 5 of different core permeabilities:
The binary displacement oil agent experiment effect of the different core permeabilities of table 5
As it can be seen that binary displacement oil agent of the invention, recovery ratio are significantly larger than the recovery ratio of water drive.
Embodiment 6
60 parts of amphoteric surfactant (erucyl amide propyl betaine: octadecyl hydroxypropyl sulfobetaine: coconut oleoyl amine
Hydroxysultaine=1:1:1)；39 parts of water；1 part of cosolvent (isopropanol)；Wetting agent 2 parts of (lecithin, fatty acid, alkane
Base phenol polyethenoxy ether=1:1:1), the above material is stirred, is uniformly mixed to get binary displacement oil agent.Binary displacement oil system
Concentration is 0.15wt%, and experimental temperature is 49 DEG C.Displacement velocity is 0.3mL/min.It is used for the harvesting of different core permeabilities
Rate such as table 6:
The binary displacement oil agent experiment effect of the different core permeabilities of table 6
As it can be seen that binary displacement oil agent of the invention, recovery ratio are significantly larger than the recovery ratio of water drive.
Claims (5)
1. a kind of binary displacement oil agent, it is characterised in that be made in parts by weight of following component: amphoteric surfactant 55~
60 parts, 36~39 parts of water, 1~5 part of cosolvent, 2~6 parts of wetting agent.
2. a kind of binary displacement oil agent as described in claim 1, it is characterised in that the amphoteric surfactant is erucic acid acyl
Amine propyl betaine, octadecyl hydroxypropyl sulfobetaine, Cocoamidopropyl betaine or cocamidopropyl propyl amide hydroxyl
One or more arbitrary proportion mixing in sulfobetaines.
3. a kind of binary displacement oil agent as described in claim 1, it is characterised in that the cosolvent is isopropanol, one in n-butanol
Kind or two kinds of arbitrary proportions mixing.
4. a kind of binary displacement oil agent as described in claim 1, it is characterised in that wetting agent is lecithin, fatty acid, alkyl phenol
One or more component arbitrary proportion mixing in polyoxyethylene ether.
5. a kind of formula system of binary displacement oil agent in DP technology, by weight percentage mainly consist of the following components:
(1) binary displacement oil agent is 0.025 ~ 0.4 %；
(2) polyacrylamide polymers are 0.05% ~ 0.25%；
(3) excess water；
Above-mentioned polyacrylamide polymers, concentration are 1200 mg/L, and molecular weight is 1000~15,000,000.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110847870A (en) * | 2019-11-06 | 2020-02-28 | 陕西银禾油气工程技术服务有限公司 | Method for improving oil displacement efficiency of oil field with medium and low water content |
| CN110862812A (en) * | 2019-11-06 | 2020-03-06 | 陕西银禾油气工程技术服务有限公司 | Method for improving crude oil recovery ratio in oil well |
| CN112538343A (en) * | 2020-12-02 | 2021-03-23 | 西安石油大油气科技有限公司 | Preparation method of oil displacement and pressure reduction type betaine surfactant |
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