CN106883833B - Oil displacement system for ultrahigh-temperature high rigidity oil reservoir with high salt - Google Patents
Oil displacement system for ultrahigh-temperature high rigidity oil reservoir with high salt Download PDFInfo
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Abstract
The invention belongs to field of oilfield chemistry, it by mass percentage include following components: the aliphatic alcohol polyethenoxy ether carboxylate of 0.30wt%~0.50wt% in particular it relates to the oil displacement system for ultrahigh-temperature high rigidity oil reservoir with high salt, the azochlorosulfonate propyl lycine of 0.30wt%~0.50wt%, remaining is water.Oil displacement agent of the invention is prepared by the surfactant of industrialized production, cheap, is applicable to reservoir temperature and is up to 130 DEG C, total salinity is up to 25 × 104Mg/L, calcium ions and magnesium ions are at concentrations up to the ultrahigh-temperature of 10000mg/L high rigidity oil reservoir with high salt.Under alkali free environment, live oil/water interfacial tension can be reduced to 10‑3The mN/m order of magnitude, and under the conditions of high temperature and high salt high rigidity after long-time aging, it reduces interfacial tension ability and stablizes, further increase recovery ratio for ultrahigh-temperature high rigidity oil reservoir with high salt and Efficient Development provides technical support.
Description
Technical field
The invention belongs to field of oilfield chemistry, and in particular, to the oil displacement system for ultrahigh-temperature high rigidity oil reservoir with high salt.
Technical background
As oil field development degree is deepened, domestic conventional oil field has entered " double height " stage of High water cut, high recovery percent of reserves,
Recoverable reserves is fewer and fewer, and stable yields difficulty is big, and it is low to further increase recovery factor potential, and people have to the sight to invest high temperature high
The harsh conditions such as salt oil field.China's system in Tahe Oilfield, Shengli Oil Field, North China Oilfield, Dagang Oilfield, Zhongyuan Oil Field, Tarim Oilfield
Deng the high temperature and high salt oil deposit that all there are rich reserves.For example, 117 DEG C of the reservoir temperature of 45 fault block oil reservoir of North China Shanxi, prime stratum
Water salinity 8.4 × 104Mg/L, divalent ion 1600mg/L；South Dagang oil field oil area is big, 90 DEG C of formation temperature with
On, salinity is 105Mg/L or more；The formation temperature of Tarim Basin part oil field oil reservoir is up to 110~150 DEG C, and salinity is up to
(11~26) × 104The mass concentration of mg/L, calcium ions and magnesium ions are up to 5000~10000mg/L.Certain areas, the main force in these oil fields
Block has entered the production decline stage, therefore to the high-efficiency mining and raising recovery ratio of the harsh oil reservoir such as (spy) high temperature and high salt oil deposit
It is increasingly urgent.
In order to improve oil recovery factor, common polymer drive, alkali drive, surfactant flooding and combination flooding, such as binary or
The chemical floodings method such as ternary composite driving.For high temperature and high salt high rigidity oil reservoir, chemical flooding method relevant to polymer, due to poly-
Close thermal degradation of the object under the harsh conditions, the problems such as salt quick effect and dissolubility is poor, therefore, it is difficult to apply；It is relevant to alkali drive
Chemical flooding method is also difficult to apply under this condition due to the problems such as fouling is serious under high salt conditions.For high temperature height
Salt high rigidity oil reservoir, surfactant flooding is most potential chemical flooding method, but difficulty is larger.
In order to solve the above difficulties, research is suitable for the oil displacement agent that high temperature and high salt high rigidity oil reservoir improves oil recovery factor,
With great social and economic effects.In recent years, to suitable for high temperature and high salt high rigidity oil reservoir oil displacement surfactant
Research obtains certain progress.For example, " one kind is for improving the harvesting of high temperature and high salt high rigidity Reservoir Crude Oil by CN201310180126.7
The oil displacement agent and flooding method of rate " discloses one kind by amine oxide type amphoteric surfactant and alkyl phenol polyoxyethylene ether carboxylic acid
Salt compounding made of displacing surfactant system, the system 100~120 DEG C of temperature, formation water salinity (10~15) ×
104Mg/L, 7000~10000mg/L of calcium ions and magnesium ions total amount reservoir condition under, can be by oil water interfacial tension 10-3MN/m quantity
Grade, and long-time aging rear stability is good, and it is preferable to improve recovery ratio effect.But its heat-resistant salt-resistant ability be still unable to satisfy it is similar
Ultrahigh-temperature high rigidity reservoir condition with high salt in oil fields such as Tarim Basins." a kind of suitable ultrahigh-temperature is with high salt by CN201110353793.1
The oil displacement agent of high contents of calcium and magnesium Homogeneous Reservoir " discloses one kind by dialkyl ether disulfonate surfactant, Nonyl pheno
Displacing surfactant system made of ether or fatty alcohol polyoxyethylene ether and dehydrated alcohol compounding, the system can be applied to temperature
100~130 DEG C of degree, salinity 5~20 × 104Mg/L, wherein calcium ions and magnesium ions content is 5~15 × 103The ultrahigh-temperature of mg/L is with high salt
High contents of calcium and magnesium oil reservoir, system interfacial activity with higher and good heat and salinity tolerance anticalcium magnesium ion ability.But the system
One of primary surfactant agent, (the 2- oxygen trimethylene sodium sulfonate -3- alkyl of i.e. 1, the 2- of dialkyl ether disulfonate surfactant bis-
Ether-propyl) glycol ether is the gemini surfactant (CN201110303538.6) by indoor synthesis, price is high
It is expensive, and industrialized production is not implemented, it is not used to oil field and constructs on a large scale.
Therefore, it is necessary to the oil displacement systems of one or more of industrialized productions, can be suitable for ultrahigh-temperature high rigidity with high salt
Oil reservoir, relative low price can be used for oil field and construct on a large scale.It is required that reducing, interfacial tension effect is good, and stability is strong, Neng Gouyong
In ultrahigh-temperature high rigidity oil reservoir surfactant flooding with high salt, oil recovery factor is improved.
Summary of the invention
It is an object of the invention to: it is anti-for displacing surfactant system temperature-resistant anti-salt in existing raising recovery ratio method
Stiffness capabilities are insufficient, it is expensive, can not extensive field application the problems such as, provide and a kind of realized industrialized production, price
It is cheap, suitable for the surfactant flooding agent of ultrahigh-temperature high rigidity oil reservoir with high salt, displacement efficiency is improved, and then improve crude oil and adopt
Yield.The oil displacement agent is applicable to reservoir temperature and is up to 130 DEG C, and total salinity is up to 25 × 104Mg/L, calcium ions and magnesium ions concentration are high
Up to 1 × 104Oil water interfacial tension, can be down to ultralow by the ultrahigh-temperature of mg/L high rigidity oil reservoir with high salt, and stability is good.
To achieve the above object, the present invention uses following scheme:
For the oil displacement system of ultrahigh-temperature high rigidity oil reservoir with high salt, by mass percentage, including following components:
The aliphatic alcohol polyethenoxy ether carboxylate of 0.30wt%~0.50wt%；
The azochlorosulfonate propyl lycine of 0.30wt%~0.50wt%；
Surplus is water.
The aliphatic alcohol polyethenoxy ether carboxylate has structure shown in formula 1:
In formula, R1 is the alkyl of carbon atom number 12~14；N be ethoxy group adduction number, preferably 9；M be metal from
Son, preferably sodium.
The azochlorosulfonate propyl lycine has structure shown in formula 2:
In formula, R2The alkyl for being 12~18 for carbon atom number, preferably 12.
The water is total salinity 25 × 104Mg/L, the water flooding of calcium and magnesium bivalent metal ion concentration 10000mg/L.
This is used for the oil displacement system of ultrahigh-temperature high rigidity oil reservoir with high salt, according to quality percentage, by fatty alcohol polyoxyethylene ether
Carboxylate and azochlorosulfonate propyl lycine, sequentially add in water flooding, and stirring and dissolving is uniform.Wherein, aliphatic alcohol polyethenoxy
Ether carboxylate concentration is 0.30wt%~0.50wt%, and azochlorosulfonate propyl lycine concentration is 0.30wt%~0.50wt%, and surplus is
The water flooding.
One of host agent of oil displacement system involved in the present invention is azochlorosulfonate propyl lycine, is quaternary ammonium salt amophoteric surface active
Agent has quaternary ammonium salt cationic and sulfonic group anion.It has chelation to metal ion, shows that good heatproof is resistance to
Salt ability and resistance to hard water.Azochlorosulfonate propyl lycine has with aliphatic alcohol polyethenoxy ether carboxylate in the present invention cooperates with work
With not only there are the anti-stiffness capabilities of good heat and salinity tolerance, but also tool was significantly reduced oil water interfacial tension effect, and in ultrahigh-temperature
Under the conditions of high rigidity with high salt, stability is good.
Compared with prior art, beneficial effects of the present invention are as follows:
(1) oil displacement system of the invention can reduce live oil/water interfacial tension to 10 without adding any alkali-3mN/m
The ultralow interfacial tension of the order of magnitude avoids grievous injury of the fouling of alkali to oil reservoir and equipment.
(2) oil displacement system of the invention is applicable to reservoir temperature and is up to 130 DEG C, and total salinity is up to 25 × 104mg/
L, calcium ions and magnesium ions are at concentrations up to 1 × 104The ultrahigh-temperature of mg/L high rigidity oil reservoir with high salt, and under the conditions of ultrahigh-temperature high rigidity with high salt
After long-time aging, reduces interfacial tension ability and stablize.Efficient Development for ultrahigh-temperature high rigidity oil reservoir with high salt provides technology
It supports.
(3) oil displacement system of the invention, it is cheap by having realized prepared by the surfactant of industrialized production, it can
Realize live large-scale application.
Detailed description of the invention
Fig. 1 is oil displacement system stability experiment result under the conditions of ultrahigh-temperature high rigidity with high salt used in embodiment 4；
Fig. 2 is oil displacement system stability experiment result under the conditions of ultrahigh-temperature high rigidity with high salt used in embodiment 5；
Fig. 3 is oil displacement system stability experiment result under the conditions of ultrahigh-temperature high rigidity with high salt used in embodiment 6.
Specific embodiment
It is described in conjunction with the embodiments a specific embodiment of the invention.In following embodiment, water used is oil field stratum water: total
Salinity 25 × 104Mg/L, Ca2+、Mg2+Ion concentration 1.0 × 104mg/L.Oil used is that oil field is dehydrated degassed crude: ground is former
Oil density 0.87g/cm3, viscosity 19.64mPas.
Embodiment 1
For the oil displacement system of ultrahigh-temperature high rigidity oil reservoir with high salt, quality group becomes: aliphatic alcohol polyethenoxy ether carboxylate
0.30%, azochlorosulfonate propyl lycine 0.30%, water 99.40%；Specific each component quality are as follows:
Aliphatic alcohol polyethenoxy ether carboxylate 0.15g；
Azochlorosulfonate propyl lycine 0.15g；
Water 49.70g.
Preparation method is as follows:
Take 49.70g oil field stratum water, by 0.15g aliphatic alcohol polyethenoxy ether carboxylate and 0.15g azochlorosulfonate propyl lycine according to
It is secondary to be added in the water, it is evenly stirred until clear transparent solutions.
The oil displacement system stirred evenly is injected in ampoule bottle and is sealed, is put into high temperature ageing tank, is placed in 130 DEG C, constant temperature
Aging 7 days, until oil displacement system reaches stable state.After aging, oil water interfacial tension, interface are measured under reservoir conditions
Power is 8.1 × 10-3mN/m。
Embodiment 2
For the oil displacement system of ultrahigh-temperature high rigidity oil reservoir with high salt, quality group becomes: aliphatic alcohol polyethenoxy ether carboxylate
0.40%, azochlorosulfonate propyl lycine 0.40%, water 99.20%；Specific each component quality are as follows:
Aliphatic alcohol polyethenoxy ether carboxylate 0.20g；
Azochlorosulfonate propyl lycine 0.20g；
Water 49.60g.
Preparation method is as follows:
Take 49.60g oil field stratum water, by 0.20g aliphatic alcohol polyethenoxy ether carboxylate and 0.20g azochlorosulfonate propyl lycine according to
It is secondary to be added in the water, it is evenly stirred until clear transparent solutions.
The oil displacement system stirred evenly is injected in ampoule bottle and is sealed, is put into high temperature ageing tank, is placed in 130 DEG C, constant temperature
Aging 7 days, until oil displacement system reaches stable state.After aging, oil water interfacial tension, interface are measured under reservoir conditions
Power is 7.3 × 10-3mN/m。
Embodiment 3
For the oil displacement system of ultrahigh-temperature high rigidity oil reservoir with high salt, quality group becomes: aliphatic alcohol polyethenoxy ether carboxylate
0.50%, azochlorosulfonate propyl lycine 0.50%, water 99.00%；Specific each component quality are as follows:
Aliphatic alcohol polyethenoxy ether carboxylate 0.25g；
Azochlorosulfonate propyl lycine 0.25g；
Water 49.50g.
Preparation method is as follows:
Take 49.50g oil field stratum water, by 0.25g aliphatic alcohol polyethenoxy ether carboxylate and 0.25g azochlorosulfonate propyl lycine according to
It is secondary to be added in the water, it is evenly stirred until clear transparent solutions.
The oil displacement system stirred evenly is injected in ampoule bottle and is sealed, is put into high temperature ageing tank, is placed in 130 DEG C, constant temperature
Aging 7 days, until oil displacement system reaches stable state.After aging, oil water interfacial tension, interface are measured under reservoir conditions
Power is 6.0 × 10-3mN/m。
Embodiment 4
For the oil displacement system of ultrahigh-temperature high rigidity oil reservoir with high salt, quality group becomes: aliphatic alcohol polyethenoxy ether carboxylate
0.30%, azochlorosulfonate propyl lycine 0.30%, water 99.40%；Specific each component quality are as follows:
Aliphatic alcohol polyethenoxy ether carboxylate 0.30g；
Azochlorosulfonate propyl lycine 0.30g；
Water 99.40g.
Preparation method is as follows:
Take 99.40g oil field stratum water, by 0.30g aliphatic alcohol polyethenoxy ether carboxylate and 0.30g azochlorosulfonate propyl lycine according to
It is secondary to be added in the water, it is evenly stirred until clear transparent solutions.
The oil displacement system stirred evenly is injected in ampoule bottle and is sealed, is put into high temperature ageing tank, is placed in 130 DEG C, constant temperature
Aging, aging 7 days, 14 days, 21 days, 28 days, 35 days respectively.After aging, oil-water interfaces are measured under the conditions of 130 DEG C respectively
Tension, experimental result are as shown in Figure 1.As can be seen that oil displacement system stability is good, interfacial tension ability is reduced substantially not by high temperature
The influence of high rigidity condition with high salt.
Embodiment 5
For the oil displacement system of ultrahigh-temperature high rigidity oil reservoir with high salt, quality group becomes: aliphatic alcohol polyethenoxy ether carboxylate
0.40%, azochlorosulfonate propyl lycine 0.40%, water 99.20%；Each component quality are as follows:
Aliphatic alcohol polyethenoxy ether carboxylate 0.40g；
Azochlorosulfonate propyl lycine 0.40g；
Water 99.20g.
Preparation method is as follows:
Take 99.20g oil field stratum water, by 0.40g aliphatic alcohol polyethenoxy ether carboxylate and 0.40g azochlorosulfonate propyl lycine according to
It is secondary to be added in the water, it is evenly stirred until clear transparent solutions.
The oil displacement system stirred evenly is injected in ampoule bottle and is sealed, is put into high temperature ageing tank, is placed in 130 DEG C, constant temperature
Aging, aging 7 days, 14 days, 21 days, 28 days, 35 days respectively.After aging, oil-water interfaces are measured under the conditions of 130 DEG C respectively
Tension, experimental result are as shown in Figure 2.As can be seen that oil displacement system stability is good, interfacial tension ability is reduced substantially not by high temperature
The influence of high rigidity condition with high salt.
Embodiment 6
For the oil displacement system of ultrahigh-temperature high rigidity oil reservoir with high salt, quality group becomes: aliphatic alcohol polyethenoxy ether carboxylate
0.50%, azochlorosulfonate propyl lycine 0.50%, water 99.00%；Each component quality are as follows:
Aliphatic alcohol polyethenoxy ether carboxylate 0.50g；
Azochlorosulfonate propyl lycine 0.50g；
Water 99.00g.
Preparation method is as follows:
Take 99.00g oil field stratum water, by 0.50g aliphatic alcohol polyethenoxy ether carboxylate and 0.50g azochlorosulfonate propyl lycine according to
It is secondary to be added in the water, it is evenly stirred until clear transparent solutions.
The oil displacement system stirred evenly is injected in ampoule bottle and is sealed, is put into high temperature ageing tank, is placed in 130 DEG C, constant temperature
Aging, aging 7 days, 14 days, 21 days, 28 days, 35 days respectively.After aging, oil-water interfaces are measured under the conditions of 130 DEG C respectively
Tension, experimental result are as shown in Figure 3.As can be seen that oil displacement system stability is good, interfacial tension ability is reduced substantially not by high temperature
The influence of high rigidity condition with high salt.
Claims (4)
1. a kind of oil displacement system, which is characterized in that by mass percentage, including following components:
The aliphatic alcohol polyethenoxy ether carboxylate of 0.30wt%~0.50wt%；
The azochlorosulfonate propyl lycine of 0.30wt%~0.50wt%；
Surplus is water,
Wherein, the aliphatic alcohol polyethenoxy ether carboxylate has structure shown in formula 1:
In formula, R1For the alkyl of carbon atom number 12~14；N is the adduction number of ethoxy group；M is metal ion；
The azochlorosulfonate propyl lycine has structure shown in formula 2:
In formula, R2The alkyl for being 12~18 for carbon atom number,
Wherein, the oil displacement system is up to 130 DEG C suitable for temperature, and total salinity is up to 25 × 104Mg/L, calcium and magnesium divalent metal
Ion concentration is up to 1 × 104The oil reservoir oil displacement of mg/L harvests.
2. oil displacement system according to claim 1, which is characterized in that the n is that 9, M is sodium ion.
3. oil displacement system according to claim 1, which is characterized in that the R2The alkyl for being 12 for carbon atom number.
4. oil displacement system according to claim 1, which is characterized in that the water is total salinity 25 × 104Mg/L, calcium and magnesium
The water flooding of bivalent metal ion concentration 10000mg/L.
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| CN108148566A (en) * | 2018-01-08 | 2018-06-12 | 中国石油化工股份有限公司 | A kind of ultralow interfacial tension heavy crude thinner and preparation method thereof |
| CN108285781B (en) * | 2018-03-19 | 2021-09-24 | 青岛大学 | Composite surfactant oil displacement system for high-calcium-magnesium oil reservoir |
| EP3842407A1 (en) * | 2019-12-27 | 2021-06-30 | KAO CHEMICALS GmbH | Ether carboxylic acid composition |
| CN111154473B (en) * | 2020-01-14 | 2022-04-08 | 北京勃兴石油科技有限公司 | Blockage removal oil displacement agent and preparation method and application thereof |
| CN113337265B (en) * | 2021-07-29 | 2021-11-23 | 山东德仕化工有限公司 | Low-tension viscosity-reducing oil displacement agent and preparation method and application thereof |
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