CN107674667A - A kind of surfactant compound system of the anti-high calcium magnesium salts of heatproof - Google Patents
A kind of surfactant compound system of the anti-high calcium magnesium salts of heatproof Download PDFInfo
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- CN107674667A CN107674667A CN201711074025.6A CN201711074025A CN107674667A CN 107674667 A CN107674667 A CN 107674667A CN 201711074025 A CN201711074025 A CN 201711074025A CN 107674667 A CN107674667 A CN 107674667A
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- compound system
- surface active
- explanation
- active agent
- gemini surface
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- 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
Abstract
The invention discloses a kind of surfactant compound system of the anti-high calcium magnesium salts of heatproof, it is characterised in that the component matched by following percetage by weight forms：Fatty alcohol ethers Gemini surface active agent is that 0.02 ~ 0.80%, sorbimacrogol oleate100 is that 0.015 ~ 0.60%, stratum water is 99.00 ~ 99.95%, and surfactant compound system is produced to neutrality using salt acid for adjusting pH after said components are sufficiently stirred.Prepared surfactant compound system can make oil/water interfacial tension reach the ultralow oil/water interfacial tension of the 10 3 mN/m orders of magnitude under the higher reservoir condition of calcium ions and magnesium ions content, have excellent Oil Displacing Capacity, and have good stability.
Description
Technical field
The present invention relates to oil extraction in oil field technical field, especially a kind of heatproof surfactant of suitable high contents of calcium and magnesium oil reservoir is answered
With system.
Background technology
Oil exploitation is to the later stage, and stable yields difficulty is big, and development situation is severe.Under the conditions of current water drive, recovery ratio also only has
35~45%, most of crude oil rest on stratum be difficult to it is mined.Surfactant flooding effectively improves oil recovering as one kind
The mode of rate, it is one of focus of domestic and international tertiary oil recovery research.At present, the widely used surfactant oil displacement master in oil field
To include anionic, nonionic and amphoteric surfactant.When screening displacing surfactant system, an important finger
Mark is that oil/water interfacial tension can be made to be down to 10-3The mN/m orders of magnitude.Currently used as the surfactant various types of oil displacement agent,
Mainly anionic sulphonate（Petroleum sulfonate, alkylbenzenesulfonate etc.）And metal carboxylate, a variety of nonionic surfactants
Such as OP series.Anion surfactant temperature resistance is good, but anticalcium magnesium ion is poor, and single nonionic surfactant resists
Salt is good, but heat-resisting property is poor, and also not reach interfacial tension ultralow for single special surface activating agent such as fluorine-containing surfactant
Requirement, it is and expensive.
Very close using the oil displacement efficiency of surfactant and the relation of geological conditions in oil recovery, formation temperature is higher, ground
Calcium, magnesium ion content are bigger in layer water, and the requirement of Surfactant is harsher.If surfactant is only capable of in pure water/original
Oil water interfacial tension is reduced in oil systems, is inadequate to completing the task of emulsification and displacement crude oil in actual oil reservoir, therefore also
It must also be kept the function of low interfacial tension in high-salinity brine/crude oil system.Usually using table in conventional system
Face activating agent compound system, a variety of surfactant compound systems can avoid the specific environmental of single surfactant sensitive
Property, increase the antijamming capability of whole system, reduce the application risk of surfactant.
Chinese invention patent 201510784786.5 discloses a kind of temperature-resistant anti-salt surfactant compound system and its answered
Method of completing the square, it is made up of a kind of sulfonate host, anion surfactant, additive and sacrifice agent, said composition has resistance to height
Temperature, the advantages of resistance to high salinity, but the surfactant system ingredient of the disclosure of the invention is complicated, cost is high and surface is lived
Property is relatively poor.Chinese invention patent 200810023518.1 disclose a kind of aliphatic alcohol polyoxyethylene sulfonate synthesis and
For the preparation method of Flooding Agent for EOR, the aliphatic alcohol polyoxyethylene sulfonate oil displacement system of preparation can be carried effectively
The oil recovery factor of high temperature, high salinity and high calcium magnesium ion oil reservoir, but the oil displacement agent system dosage disclosed in the invention compared with
Height, displacement of reservoir oil cost is too high, and does not possess good oil/water interfacial tension under conditions of with compared with high calcium magnesium ion content.Cause
, it is necessary to which one or more can be under extra-high calcium and magnesium reservoir media, cooperative effect is notable, stability is good, significantly reduces oil/water for this
The efficient surfactant oil displacement system of interfacial tension.
The content of the invention
It is an object of the invention to show for existing displacing surfactant system heatproof anticalcium magnesium ion is indifferent
A kind of truth condition, there is provided heatproof surfactant compound system of suitable high contents of calcium and magnesium oil reservoir.
The surfactant compound system of the anti-high calcium magnesium salts of a kind of heatproof disclosed in this invention, it is characterized in that preparing the drive
The raw material and each component mass fraction of oil systems are as follows：
Fatty alcohol ethers Gemini surface active agent 0.02 ~ 0.80%
Sorbimacrogol oleate100 0.015 ~ 0.60%
Stratum water 99.00 ~ 99.95%.
In above-mentioned technical proposal, described fatty alcohol ethers Gemini surface active agent be octanol ether Gemini surface active agent,
Ten alcohol ether Gemini surface active agents, lauryl alcohol ether Gemini surface active agent, tetradecyl alchohol ether Gemini surface active agent, hexadecanol ether are double
One or more in sub- surfactant, octadecyl alcolol ether Gemini surface active agent, its general structure are：
M is metal sodium ion in formula, or is potassium ion, or is lithium ion；N is any one even number in 8-18.
In above-mentioned technical proposal, described stratum water is oil field stratum water either simulated formation water, the calcium in the water of stratum
Magnesium ion content is 500 ~ 5000mg/L, and total salinity is 2000 ~ 100000 mg/L.
A kind of surfactant compound system of the anti-high calcium magnesium salts of above-mentioned heatproof, its preparation method are as follows：
（1）At normal temperatures and pressures, fatty alcohol ethers Gemini surface active agent and sorbimacrogol oleate100 are added in the water of stratum, are sufficiently stirred
0.5-2 hours；
（2）Adjusted using hydrochloric acid（1）The pH of middle mixed material produces surfactant compound system to neutrality.
The surfactant compound system of the anti-high calcium magnesium salts of heatproof provided by the invention can form ultralow oil/water with crude oil
Interfacial tension, there is excellent Oil Displacing Capacity.
The surfactant compound system of the anti-high calcium magnesium salts of heatproof provided by the invention is under wider calcium ions and magnesium ions content
Having preferably reduces the ability of oil/water interfacial tension, still has excellent property under the reservoir condition of extra-high calcium ions and magnesium ions concentration
Can, and have good stability.
Embodiment
Below by embodiment, the present invention is further elaborated.
Embodiment 1
0.08g lauryl alcohol ethers Gemini surface active agent, 0.07g sorbimacrogol oleate100s is taken to be added in 99.85g simulated formation water.Simulation ground
The calcium ions and magnesium ions content of layer water is about 2000 mg/L, and total salinity is about 60000 mg/L.Stirring makes surface-active in 0.5 hour
Agent is fully dissolved, and then using hydrochloric acid regulation system pH to neutrality, produces surfactant compound system.
Embodiment 2
0.20g tetradecyl alchohol ethers Gemini surface active agent, 0.10g sorbimacrogol oleate100s is taken to be added in 99.70g simulated formation water.Simulation ground
The calcium ions and magnesium ions content of layer water is 3000 mg/L, and total salinity is 30000 mg/L.Stirring fills surfactant in 1.5 hours
Divide dissolving, then using hydrochloric acid regulation system pH to neutrality, produce surfactant compound system.
Embodiment 3
0.25g hexadecanol ethers Gemini surface active agent, 0.25g sorbimacrogol oleate100s is taken to be added in 99.50g simulated formation water.Simulation ground
The calcium ions and magnesium ions content of layer water is 800 mg/L, and total salinity is 6000 mg/L.Stirring makes surfactant abundant in 1.0 hours
Dissolving, then using hydrochloric acid regulation system pH to neutrality, produces surfactant compound system.
Embodiment 4
0.55g octadecyl alcolol ethers Gemini surface active agent, 0.05g sorbimacrogol oleate100s is taken to be added in 99.40g simulated formation water.Simulation ground
The calcium ions and magnesium ions content of layer water is 5000 mg/L, and total salinity is 100000 mg/L.Stirring fills surfactant in 1.5 hours
Divide dissolving, then using hydrochloric acid regulation system pH to neutrality, produce surfactant compound system.
Embodiment 5
Using rotation oil dripping/water interfacial tension instrument, the surfactant compound prepared by embodiment 1 ~ 4 is determined at 50 ~ 80 DEG C
System and the oil/water interfacial tension of Bamianhe Oilfield crude oil.Test condition is：50 ~ 80 DEG C, surfactant qualities concentration
0.3%th, the mg/L of simulated formation water calcium ions and magnesium ions content 5000, total salinity are 100000 mg/L.Test result is shown in Table 1.Can be with
To find out, two kinds of surfactants have certain synergy in complexed surfactant oil displacement system provided by the invention,
The ability of stronger reduction oil/water interfacial tension is shown under high contents of calcium and magnesium reservoir condition.
The oil/water interfacial tension test result of table 1
| Compound system | Test temperature/DEG C | Oil/water interfacial tension/mNm-1 |
| Embodiment 1 | 50 | 0.0090 |
| Embodiment 2 | 60 | 0.0073 |
| Embodiment 3 | 70 | 0.0041 |
| Embodiment 4 | 80 | 0.0013 |
Certainly, it is limitation of the present invention that described above, which is not, and the present invention is also not limited to the example above, the art
Those of ordinary skill, the present invention essential scope in, change, addition or the replacement made, should all belong to the present invention guarantor
Protect scope.
Claims (4)
- A kind of 1. surfactant compound system of the anti-high calcium magnesium salts of heatproof, it is characterised in that prepare the compound system raw material and Each component mass fraction is as follows：Fatty alcohol ethers Gemini surface active agent 0.02 ~ 0.80%Sorbimacrogol oleate100 0.015 ~ 0.60%Stratum water 99.00 ~ 99.95%.
- A kind of 2. surfactant compound system of the anti-high calcium magnesium salts of heatproof according to claim 1, it is characterised in that institute The fatty alcohol ethers Gemini surface active agent stated is octanol ether Gemini surface active agent, ten alcohol ether Gemini surface active agents, 12 Alcohol ether Gemini surface active agent, tetradecyl alchohol ether Gemini surface active agent, hexadecanol ether Gemini surface active agent, octadecyl alcolol ether Shuangzi One or more in surfactant, its general structure are：Explanation:Explanation:Explanation:Explanation:Explanation:Explanation:Explanation:Explanation:Explanation: noname00M is metal sodium ion in formula, or is potassium ion, or is lithium ion；N is any one even number in 8-18.
- A kind of 3. surfactant compound system of the anti-high calcium magnesium salts of heatproof according to claim 1, it is characterised in that institute The stratum water stated is oil field stratum water or simulated formation water, and its calcium ions and magnesium ions content is 500 ~ 5000mg/L, and total salinity is 2000~100000 mg/L。
- 4. a kind of surfactant compound system of the anti-high calcium magnesium salts of heatproof according to claim 1, its preparation method are pressed Carried out according to following steps：（1）At normal temperatures and pressures, fatty alcohol ethers Gemini surface active agent and sorbimacrogol oleate100 are added in the water of stratum, are sufficiently stirred 0.5-2 hours；（2）Adjusted using hydrochloric acid（1）The pH of middle mixed material produces surfactant compound system to neutrality.
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| CN201711074025.6A CN107674667B (en) | 2017-11-05 | 2017-11-05 | Temperature-resistant high-calcium magnesium salt-resistant surfactant compound system |
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| CN201711074025.6A CN107674667B (en) | 2017-11-05 | 2017-11-05 | Temperature-resistant high-calcium magnesium salt-resistant surfactant compound system |
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| CN107674667B CN107674667B (en) | 2020-04-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108285781A (en) * | 2018-03-19 | 2018-07-17 | 青岛大学 | A kind of high contents of calcium and magnesium oil reservoir complexed surfactant oil displacement system |
| CN108311058A (en) * | 2018-03-19 | 2018-07-24 | 青岛大学 | One kind anionic type Gemini surface active agent containing diphenyl propane and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108285781A (en) * | 2018-03-19 | 2018-07-17 | 青岛大学 | A kind of high contents of calcium and magnesium oil reservoir complexed surfactant oil displacement system |
| CN108311058A (en) * | 2018-03-19 | 2018-07-24 | 青岛大学 | One kind anionic type Gemini surface active agent containing diphenyl propane 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 |
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| CN107674667B (en) | 2020-04-03 |
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