CN109777393A - A kind of foam flooding finish - Google Patents
A kind of foam flooding finish Download PDFInfo
- Publication number
- CN109777393A CN109777393A CN201910210546.2A CN201910210546A CN109777393A CN 109777393 A CN109777393 A CN 109777393A CN 201910210546 A CN201910210546 A CN 201910210546A CN 109777393 A CN109777393 A CN 109777393A
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- Prior art keywords
- foam
- foam flooding
- flooding finish
- foaming agent
- sulfopropyl
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Abstract
The present invention provides a kind of foam flooding finishes suitable for high temperature and high salt oil deposit, by weight percentage include the water of 0.3%~0.8% foaming agent, 0.5%~2.0% foam stabilizer and surplus.Foam flooding finish of the invention can significantly improve the recovery ratio of high temperature and high salt oil deposit high temperature and high salt condition stability inferior is strong, long half time.
Description
Technical field
The invention belongs to field of oilfield chemistry, in particular it relates to a kind of foam flooding finish, more specifically, this hair
It is bright to be related to a kind of soft particle strengthening foam flooding finish of the polymer suitable for high temperature and high salt oil deposit.
Background technique
China's high temperature and high salt fracture-pore reservoir rich reserves, but oil reservoir structure, based on crack and solution cavity, space connects
The general character is special, and remaining oil saturation is high after water drive, and the remaining oil in fracture-pore reservoir is partially deposited in the form of " attic oil "
?.Since gas has the characteristics that low density, the high-order bits " attic oil " of fracture-cavity units can be fed through to effectively to improve
The recovery ratio of fracture-pore reservoir.However due to the density between water, oil, gas three, viscosity differences, gas drive is in the process easily in oil
Has channeling occurs for the top of hiding, causes remaining oil saturation in the middle part of oil reservoir higher.It, can be by adjusting gas for conventional oil reservoir
Liquid proportional adjusts foam density, and then realizes and block has channeling at the top of oil reservoir, the purpose of remaining oil in the middle part of displacement oil reservoir.But it steeps
Foam itself is used as thermodynamic unstable system, and high temperature and high salt condition makes gravity drainage, Laplace drain and Ostwald curing
Etc. processes aggravation, foam stability reduce.By taking system in Tahe Oilfield fracture-pore reservoir as an example, temperature is up to 130 DEG C, and salinity is up to
220000mg/L, usual foam are difficult to keep preferable stability in such ground environment.Therefore, in order to improve high temperature height
The recovery ratio of salt fracture-pore reservoir needs the foam system that exploitation is suitable for high temperature and high salt condition.
Summary of the invention
Goal of the invention of the invention is aiming at the problems existing in the prior art, to provide a kind of suitable for high temperature and high salt oil
The soft particle strengthening foam flooding finish of the polymer of hiding.
Technical solution of the present invention is specific as follows:
A kind of foam flooding finish, by weight percentage including 0.3%~0.8% foaming agent, 0.5%~2.0%
The water of foam stabilizer and surplus.
Further, by weight percentage include 0.4%~0.6% foaming agent, 0.8%~1.5% foam stabilizer and
The water of surplus.
Further, the water is simulation water.
Further, the foaming agent includes the sulfopropyl polyoxyethylene lauryl base alcohol ether and oil that weight ratio is 2:1~1:3
Sour amide hydroxy sulfo lycine.
Further, the foaming agent includes the sulfopropyl polyoxyethylene lauryl base alcohol ether and oil that weight ratio is 1:1~1:2
Sour amide hydroxy sulfo lycine.
Further, the molecular formula of the sulfopropyl polyoxyethylene lauryl base alcohol ether is C12H25O(CH2CH2O)n(CH2)3SO3M, wherein n is 10~15 integer, M H+Or Na+。
Further, the foam stabilizer is polyethylene glycol.
Further, the relative molecular mass of the polyethylene glycol is 12000~20000.
Further, the half-life period of the foam flooding finish is 4~5 hours.
Compared with the prior art, technical solution of the present invention has the following beneficial effects:
(1) foam stabilizer used in the present invention is the polyethylene glycol (molecular weight 12000~20000) of low molecular weight, due to
Its low molecular weight, stability under the conditions of high temperature and high salt is good, and degradation speed is slow, it is ensured that it is under the conditions of high temperature and high salt
Foam stabilizing ability.
(2) with foaming agent self assembly can occur for the foam stabilizer polyethylene glycol that the present invention uses, and being formed has surface-active
Soft particle, the stability of liquid film can be further enhanced by being adsorbed on gas-liquid interface, to enhance foam stability.
(3) foaming agent (130 DEG C, 220000mg/L, 1MPa) under the conditions of high temperature and high salt has excellent stability, and leads to
It crosses the half foam life period that Bubbling method measures and is up to 4~5h, in addition indoor moveable experiment shows that the foaming agent improves recovery ratio and is up to
14.2%~22%.
Specific embodiment
In order to fully understand the purpose of the present invention, feature and effect, by following specific embodiments, the present invention is made detailed
It describes in detail bright.For process of the invention in addition to following the description, remaining is all made of the conventional method or device of this field.Following nouns
Term is unless otherwise stated, all have the normally understood meaning of those skilled in the art.
It, can be from two aspects of foaming agent and foam stabilizer to develop the foam system for being suitable for high temperature and high salt condition.
For foaming agent, inventor studies discovery polyethenoxy ether sulphonate class surfactant and betaines surfactant
Preferable foaming characteristic is still able to maintain under the conditions of high temperature and high salt, but simple foaming agent cannot be kept under the conditions of high temperature and high salt
Preferable foaming properties, because the foam that simple foaming agent generates is poor in high temperature and high salt condition stability inferior, this is just needed surely
Infusion improves stability of foam under the conditions of high temperature and high salt.
For foam stabilizer, there are two types of currently used foam stabilizers: polymer and solid particle.Wherein polymer due to
Its high molecular weight characteristic, can be enhanced the viscosity of bubble film, to reduce the drain age velocity of liquid film, and then it is steady to improve foam
It is fixed.However the polymer of high molecular weight is easily degraded under the conditions of high temperature and high salt, and stable foam ability is caused to decline.It is another
Foam stabilizer is particulate species foam stabilizer, such as nanometer silicon dioxide particle, fly ash grain and clay particle.Stable foam
Mechanism includes: that Desorption Energy is theoretical, particle aggregate is theoretical, particle arrangement hinders drain theoretical and maximum capillary pressure is theoretical.So
And particle is easily reunited under high temperature and high salt adjusting, is precipitated, and stable foam ability is caused to decline.Therefore, currently used poly-
Closing object and particulate species foam stabilizer cannot preferably improve stability of foam under the conditions of high temperature and high salt, lead to high temperature and high salt item
Foam stability is poor under part, and it is bad that foam flooding improves oil recovery factor effect.
The present inventor is creative by sulfopropyl polyoxyethylene lauryl base alcohol ether and oleamide by research
Hydroxy sulfo lycine carries out compounding as foaming agent according to specific ratio, and using the polyethylene glycol of low molecular weight as foam stabilizing
Agent, to propose one kind, suitable for high temperature and high salt oil deposit condition, (temperature is not less than 130 DEG C, and salinity is not less than 220000mg/
L the soft particle strengthening foam flooding finish of polymer), to improve the recovery ratio of high temperature and high salt fracture-pore reservoir.
Foam flooding finish of the invention include by weight percentage 0.3%~0.8% foaming agent, 0.5%~2.0%
Foam stabilizer and surplus water.Preferably, foam flooding finish of the invention includes 0.4%~0.6% by weight percentage
Foaming agent, 0.8%~1.5% foam stabilizer and the water of surplus.
Wherein, water can simulate the salinity of water oil reservoir applied by foam flooding finish according to the present invention using simulation water
Salinity and determine, be not specifically limited herein.
Preferably, foaming agent using sulfopropyl polyoxyethylene lauryl base alcohol ether and oleamide hydroxy sulfo lycine according to
Weight ratio is that 2:1~1:3 is compounded.It is highly preferred that foaming agent uses sulfopropyl polyoxyethylene lauryl base alcohol ether and oleic acid
Amide hydroxy sulfo lycine is that 1:1~1:2 is compounded according to weight ratio.
Wherein, the molecular formula of sulfopropyl polyoxyethylene lauryl base alcohol ether is C12H25O(CH2CH2O)n(CH2)3SO3M,
Middle n is 10~15 integer, M H+Or Na+。
Wherein, oleamide hydroxy sulfo lycine molecular formula is C17H33CONH(CH2)3N+(CH3)2CH2CH(OH)
CH2SO3 -。
Preferably, foam stabilizer uses the polyethylene glycol of low molecular weight.The relative molecular weight of polyethylene glycol is preferably 12000~
20000。
The present invention is by sulfopropyl polyoxyethylene lauryl base alcohol ether and oleamide hydroxy sulfo lycine according to specific ratio
Example carries out compounding as foaming agent, and using the polyethylene glycol of low molecular weight as foam stabilizer.On the one hand, sulfopropyl polyoxyethylene
Dodecyl alcohol ether and oleamide hydroxy sulfo lycine act synergistically between both surfactants, improve gas
The surface spreading modulus at liquid interface, and then improve foam stability；On the other hand, polyethylene glycol is big due to containing in its molecule
The ether oxygen atom of amount, in aqueous solution be easy and H+In conjunction with making it with certain positive electricity, so polyethylene glycol is in electrostatic interaction
It assembles to form the soft particle of aggregation with surfactant under hydrophobic effect, which has certain surface-active, so
It is easily adsorbed on gas-liquid interface, improves gas-liquid interface mechanical strength, and then improve foam stability.
The substance used in the present invention can be bought by market and be obtained, for example, sulfopropyl polyoxyethylene lauryl base alcohol
Ether is purchased from Qingdao Changxing East China Co., Ltd, and oleamide hydroxy sulfo lycine is purchased from Linyi Lv Sen Science and Technology Ltd., poly- second
Glycol is purchased from Hai'an petrochemical plant.
Foam flooding finish of the invention can be uniformly mixed using conventional method.For example, sulfopropyl is gathered according to the ratio
It ethylene oxide dodecyl alcohol ether, oleamide hydroxy sulfo lycine, polyethylene glycol and is mixed and stirred for uniformly being steeped with water
Foam liquid.
Embodiment
The present invention is further illustrated below by the mode of embodiment, but does not therefore limit the present invention to the reality
It applies among a range.In the following examples, the experimental methods for specific conditions are not specified, according to conventional methods and conditions, or according to quotient
The selection of product specification.
The test method of the half-life period of foam flooding finish in following embodiments: being placed in 130 DEG C for 100mL foam flooding finish,
In the foam meter of 1MPa, raw bubble is carried out using Bubbling method, record foam volume changes with time, and then calculates half foam life period
tf, specifically, half foam life period is time when foam volume is reduced to original foam volume half.
State the test method of influence of the foam flooding finish to recovery of core in embodiment: by laboratory core flowing experiment
Investigate influence of the foam flooding finish to recovery of core.
Embodiment 1:
In beaker be added 0.2g sulfopropyl polyoxyethylene lauryl base alcohol ether, 0.2g oleamide hydroxy sulfo lycine,
The simulation water that 0.5g polyethylene glycol and 99.1g salinity are 220000mg/L is sufficiently stirred to get to foam flooding finish, passes through
Foam meter Bubbling method measures the foam system at 130 DEG C, and half foam life period reaches 4.06h under the conditions of 1MPa.Pass through laboratory core stream
Dynamic experiment shows that the system improves recovery ratio 14.6%.
Embodiment 2:
In beaker be added 0.2g sulfopropyl polyoxyethylene lauryl base alcohol ether, 0.2g oleamide hydroxy sulfo lycine,
The simulation water that 0.8g polyethylene glycol and 98.8g salinity are 220000mg/L is sufficiently stirred to get to foam flooding finish, passes through
Foam meter Bubbling method measures the foam system at 130 DEG C, and half foam life period reaches 4.68h under the conditions of 1MPa.Pass through laboratory core stream
Dynamic experiment shows that the system improves recovery ratio 18.2%.
Embodiment 3:
In beaker be added 0.4g sulfopropyl polyoxyethylene lauryl base alcohol ether, 0.4g oleamide hydroxy sulfo lycine,
The simulation water that 1.2g polyethylene glycol and 98g salinity are 220000mg/L is sufficiently stirred to get to foam flooding finish, passes through bubble
Foam instrument Bubbling method measures the foam system at 130 DEG C, and half foam life period reaches 5h under the conditions of 1MPa.Pass through laboratory core flowing experiment
Show that the system improves recovery ratio 22%.
Embodiment 4:
In beaker be added 0.1g sulfopropyl polyoxyethylene lauryl base alcohol ether, 0.2g oleamide hydroxy sulfo lycine,
The simulation water that 0.8g polyethylene glycol and 98.9g salinity are 220000mg/L is sufficiently stirred to get to foam flooding finish, passes through
Foam meter Bubbling method measures the foam system at 130 DEG C, and half foam life period reaches 4.4h under the conditions of 1MPa.It is flowed by laboratory core
Experiment shows that the system improves recovery ratio 16%.
Embodiment 5:
In beaker be added 0.1g sulfopropyl polyoxyethylene lauryl base alcohol ether, 0.3g oleamide hydroxy sulfo lycine,
The simulation water that 0.8g polyethylene glycol and 98.8g salinity are 220000mg/L is sufficiently stirred to get to foam flooding finish, passes through
Foam meter Bubbling method measures the foam system at 130 DEG C, and half foam life period reaches 4.0h under the conditions of 1MPa.It is flowed by laboratory core
Experiment shows that the system improves recovery ratio 14.2%.
Embodiment 6:
In beaker be added 0.2g sulfopropyl polyoxyethylene lauryl base alcohol ether, 0.1g oleamide hydroxy sulfo lycine,
The simulation water that 0.8g polyethylene glycol and 98.9g salinity are 220000mg/L is sufficiently stirred to get to foam flooding finish, passes through
Foam meter Bubbling method measures the foam system at 130 DEG C, and half foam life period reaches 4.2h under the conditions of 1MPa.It is flowed by laboratory core
Experiment shows that the system improves recovery ratio 15%.
Embodiment 7:
In beaker be added 0.3g sulfopropyl polyoxyethylene lauryl base alcohol ether, 0.3g oleamide hydroxy sulfo lycine,
The simulation water that 0.8g polyethylene glycol and 98.6g salinity are 220000mg/L is sufficiently stirred to get to foam flooding finish, passes through
Foam meter Bubbling method measures the foam system at 130 DEG C, and half foam life period reaches 4.8h under the conditions of 1MPa.It is flowed by laboratory core
Experiment shows that the system improves recovery ratio 19.8%.
Embodiment 8:
In beaker be added 0.2g sulfopropyl polyoxyethylene lauryl base alcohol ether, 0.4g oleamide hydroxy sulfo lycine,
The simulation water that 1.5g polyethylene glycol and 97.9g salinity are 220000mg/L is sufficiently stirred to get to foam flooding finish, passes through
Foam meter Bubbling method measures the foam system at 130 DEG C, and half foam life period reaches 4.85h under the conditions of 1MPa.Pass through laboratory core stream
Dynamic experiment shows that the system improves recovery ratio 20.2%.
Embodiment 9:
In beaker be added 0.2g sulfopropyl polyoxyethylene lauryl base alcohol ether, 0.2g oleamide hydroxy sulfo lycine,
The simulation water that 2.0g polyethylene glycol and 98g salinity are 220000mg/L is sufficiently stirred to get to foam flooding finish, passes through bubble
Foam instrument Bubbling method measures the foam system at 130 DEG C, and half foam life period reaches 4.98h under the conditions of 1MPa.It is flowed by laboratory core
Experiment shows that the system improves recovery ratio 21.2%.
The present invention is hereinbefore disclosed with preferred embodiment, but it should be understood by those skilled in the art that, these
Embodiment is only used for describing the present invention, but should not be understood as limiting the scope of the invention.It should be noted that all implement with these
Example equivalent variation and displacement, should all be set as being covered by scope of the presently claimed invention.Therefore, protection scope of the present invention
It should be subject to range defined in claims.
Claims (9)
1. a kind of foam flooding finish, which is characterized in that by weight percentage including 0.3%~0.8% foaming agent, 0.5%
~2.0% foam stabilizer and the water of surplus.
2. foam flooding finish according to claim 1, which is characterized in that by weight percentage include 0.4%~0.6%
Foaming agent, 0.8%~1.5% foam stabilizer and the water of surplus.
3. foam flooding finish according to claim 1 or 2, which is characterized in that the water is simulation water.
4. foam flooding finish according to claim 1 or 2, which is characterized in that the foaming agent include weight ratio be 2: 1~
1: 3 sulfopropyl polyoxyethylene lauryl base alcohol ether and oleamide hydroxy sulfo lycine.
5. foam flooding finish according to claim 4, which is characterized in that the foaming agent includes that weight ratio is 1: 1~1: 2
Sulfopropyl polyoxyethylene lauryl base alcohol ether and oleamide hydroxy sulfo lycine.
6. foam flooding finish according to claim 4 or 5, which is characterized in that the sulfopropyl polyoxyethylene lauryl base
The molecular formula of alcohol ether is C12H25O(CH2CH2O)n(CH2)3SO3M, wherein n is 10~15 integer, M H+Or Na+。
7. foam flooding finish according to claim 1 or 2, which is characterized in that the foam stabilizer is polyethylene glycol.
8. foam flooding finish according to claim 7, which is characterized in that the relative molecular mass of the polyethylene glycol is
12000~20000.
9. described in any item foam flooding finishes according to claim 1~8, which is characterized in that the foam flooding finish partly declines
Phase is 4~5 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910210546.2A CN109777393B (en) | 2019-03-19 | 2019-03-19 | Foam oil displacement agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910210546.2A CN109777393B (en) | 2019-03-19 | 2019-03-19 | Foam oil displacement agent |
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| CN109777393A true CN109777393A (en) | 2019-05-21 |
| CN109777393B CN109777393B (en) | 2020-04-14 |
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| CN201910210546.2A Active CN109777393B (en) | 2019-03-19 | 2019-03-19 | Foam oil displacement agent |
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Cited By (3)
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| CN114437703A (en) * | 2021-12-27 | 2022-05-06 | 河南天祥新材料股份有限公司 | Efficient composite foaming cleanup additive for fracturing and preparation method thereof |
| CN115216284A (en) * | 2021-04-15 | 2022-10-21 | 中国石油天然气股份有限公司 | Three-phase foam system suitable for deep clastic rock oil reservoir gas channeling regulation |
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|---|---|
| CN109777393B (en) | 2020-04-14 |
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