CN109054796A - A kind of high efficiency composition oil displacement agent and preparation method thereof - Google Patents
A kind of high efficiency composition oil displacement agent and preparation method thereof Download PDFInfo
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- 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
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Abstract
The invention discloses a kind of high efficiency composition oil displacement agent, the oil displacement agent is made of the following raw material: lignosulfonates, aliphatic alcohol polyoxyethylene sulfonate, xanthan gum, Gemini surface active agent, anionic surfactant, organic solvent and water.Alkali is not added in oil displacement agent of the invention, to reduce injury of the alkali to stratum, is conducive to the suitable development in oil field；Oil displacement agent thermostabilization of the invention is good, high temperature resistant, will not be muddy at 130 DEG C of stratum, and no precipitating can effectively play the effect for reducing interfacial tension, by the compound of anionic surfactant and Gemini surface active agent, can be used for low pressure and low permeability oil field；Oil displacement agent of the invention can combine closely with the sulfur component in viscous crude, preferably play wettability reversal and reducing crude oil viscosity effect, therefore the viscosity of viscous crude can be significantly reduced under the use condition of low concentration, improve recovery ratio.
Description
Technical field
The invention belongs to technical field of petroleum extraction, and in particular to a kind of high efficiency composition oil displacement agent and preparation method thereof.
Background technique
Divide three phases according to oil exploitation: primary oil recovery, secondary oil recovery and tertiary oil recovery.Primary oil recovery, which refers to, utilizes oil
The exploitation of natural energy is hidden, recovery ratio is lower than 15%；Secondary oil recovery refers to using external complement stratum energy (such as water filling, note
Gas), to keep the raising of stratum energy, up to 45%, tertiary oil recovery refers to by injecting other fluids recovery ratio.Using object
Reason, chemistry, heat, biology etc. change reservoir rocks and fluid properties, improve oil recovery after water drive, and recovery ratio reaches 50-
90%.The oil field in China is continental reservoir mostly, and oil reservoir is more, difference is big, and heterogeneity is serious, the development mode of early stage with
Fill the water in the majority, still, long-period water drive makes stratum new secondary duct occur, forms many water breakthrough channels, considerably reduces water
Efficiency is driven, causes energy waste, the composite water cut in oil field is also always up to 80% or more.Chemical flooding is divided into: polymer flooding, table
Face surfactant flooding, alkali drive, combination flooding.It is all that chemical agent is added into injection water in tertiary oil recovery, to change displacement fluid
The interfacial characteristics of matter, displacement fluid and crude oil, so that all methods for being conducive to crude oil production belong to chemical flooding scope, and
Corresponding chemical agent is then known as polymer oil-displacing agent, surfactant flooding agent, alkali drive finish, compound oil displacement agent.
Surfactant has the interfacial tension for reducing oil reservoir Crude Oil and water, improves the wetability of rock surface, reduces
Crude oil capillary resistance, while anionic surfactant adsorbs on oil droplet and rock surface, improves the charge of rock surface
Density increases the electrostatic repulsion between oil droplet and rock surface, overcomes oil film in the adsorption capacity of rock surface, improves washing oil effect
Rate.
With the continuous exploitation of petroleum, China land majority oil field has all come into development late stage i.e. High water cut and spy
High water cut stage, polymer flooding are not suitable with low pressure and low permeability oil field, ternary composite driving, that is, alkali-polymer-surfactant, due to
It is contained therein to there is alkali and polymer all to bring huge injury to the stratum of near oil fields and oil well etc., and existing oil displacement agent is not
High temperature resistant, saline-alkaline tolerance are poor, are not suitable for the exploitation of high temperature, with high salt, low pressure, low permeability formation petroleum, and the petroleum in existing stage
There is raw material sources cannot be guaranteed for the oil displacement agents such as sulfonate, alkylbenzene sulfonate, petroleum carboxylate, and production cost is higher etc. asks
Topic.
For these reasons, the present invention is specifically proposed.
Summary of the invention
In order to solve problem above of the existing technology, the present invention provides a kind of high-efficient oil-displacing agent and its preparation sides
Method, oil displacement agent of the invention are suitable for low pressure and low permeability oil field, have high temperature resistant, the performance of salt resistance, oil displacement efficiency can be improved, and increase
Add recovery ratio, and usage amount is small.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of high efficiency composition oil displacement agent, the oil displacement agent are made of the following raw material: lignosulfonates, fatty alcohol polyoxy
Ethylene ether sulfonate, xanthan gum, Gemini surface active agent, anionic surfactant, organic solvent and water.
The present invention is answered using lignosulfonates, two kinds of sulfonate of aliphatic alcohol polyoxyethylene sulfonate and xanthan gum
Match, improve the stability of oil displacement agent, 130 DEG C or more can be reached with high temperature resistant, is not in precipitating, not muddy, saline-alkaline tolerance
It is good；Anionic surfactant of the invention has strong emulsifiability, oil displacement system and emulsification of crude oil can be made to be formed stable
Middle microemulsion phase, and there is good solubilisation oils outlet capacity, interfacial tension reaches the lower order of magnitude, the boundary that oil is mutually shown in water phase
Face tension is 2.0 × 10-3MN/m or less.
Oil displacement agent of the invention, by the synergistic effect of various raw materials, reduces oil displacement agent and crude oil by the way of combination flooding
Between interfacial tension, improve the washing oil ability of oil displacement agent, emulsify crude oil, improve oil reservoir hole wetability, improve
Microscopic oil displacement efficiency can improve the mobility ratio of oil displacement agent using xanthan gum in the present invention, improve macroscopic sweep efficiency, improve and drive
Oil cut rate, since xanthan gum is a kind of multi-functional biopolymer, stability with higher, viscosity is not by the shadow of salt
It rings, the oil displacement agent of preparation has the characteristics that high temperature resistant, with high salt and stability are good.
Gemini surface active agent is a kind of efficient, multifunctional novel kind for being different from conventional surfactant, such
Surfactant breaches the single-stranded structure of conventional surfactant, with two long hydrophobic chains and two hydrophilic, and by
The compound that linking group is formed by connecting by chemical bond, N, N '-bis- fatty dodecanoyl ethylene diamine dipropionic acid sodium Shuangzi surfaces
Activating agent since cmc value is lower, surfactant is higher, form ultralow interfacial tension needed for concentration very little, therefore can be efficiently
Lower oil water interfacial tension, and have well solubilising and compounding capacity, the present invention in by Gemini surface active agent and yin from
The oil displacement efficiency of the compounding of sub- surfactant, the oil displacement agent of formation is more preferable, has lower interfacial tension.
Further, according to parts by weight, the oil displacement agent is made of the following raw material: lignosulfonates 10-15 weight
Part, aliphatic alcohol polyoxyethylene sulfonate 10-20 parts by weight, xanthan gum 8-12 parts by weight, Gemini surface active agent 20-25 weight
Part, anionic surfactant 10-15 parts by weight, organic solvent 10-14 parts by weight and water 40-50 parts by weight.
Further, according to parts by weight, the oil displacement agent is made of the following raw material: 13 parts by weight of lignosulfonates,
15 parts by weight of aliphatic alcohol polyoxyethylene sulfonate, 10 parts by weight of xanthan gum, 23 parts by weight of Gemini surface active agent, anion table
45 parts by weight of 12 parts by weight of face activating agent, 12 parts by weight of organic solvent and water.
Further, the sulfonate in the lignosulfonates and the aliphatic alcohol polyoxyethylene sulfonate is
Sodium salt, sylvite, calcium salt or magnesium salts.
Further, the aliphatic alcohol polyoxyethylene sulfonate is C15-C17Fatty alcohol polyoxyethylene ether sulfonic acid
Salt.
Further, the Gemini surface active agent is N, and the bis- fatty dodecanoyl ethylene diamine dipropionic acid sodium of N '-are described
Anionic surfactant be lauryl sodium sulfate or neopelex.
The bis- fatty dodecanoyl ethylene diamine dipropionic acid sodium of Gemini surface active agent N, N '-in the present invention are all made of existing skill
Art is prepared.
Further, the organic solvent is n-butanol.
The present invention also provides the preparation method of the high efficiency composition oil displacement agent described in one kind, the preparation method, including
Following steps:
(1) it is weighed respectively according to the weight of each raw material spare；
(2) at normal temperature, lignosulfonates and aliphatic alcohol polyoxyethylene sulfonate have been added in water, have been heated,
It stirs evenly, obtains mixed solution A；
(3) spare Gemini surface active agent and anionic surfactant are added in the organic solvent, are added
Heat stirs evenly, and obtains mixed solution B；
(4) mixed solution A is added slowly in the mixed solution B, xanthan gum is then added, stirs evenly,
Obtain the high efficiency composition oil displacement agent.
Further, heating temperature is 40-50 DEG C in step (2).
The present inventor passes through a large number of experiments and finds when temperature uses 40-50 DEG C, lignosulfonates and fatty alcohol polyoxy
Ethylene ether sulfonate can adequately dissolve, and the stability of the oil displacement agent of formation is more preferable.
Further, heating temperature is 45-55 DEG C in step (3).
The present inventor has found through overtesting, when using 45-55 DEG C, the oil displacement agent heat resistance and stabilization finally prepared
Property is preferable.
Compared with prior art, beneficial effects of the present invention are as follows:
(1) alkali is not added in oil displacement agent of the invention, to reduce injury of the alkali to stratum, is conducive to holding for oil field
Continuous exploitation；
(2) oil displacement agent thermostabilization of the invention is good, high temperature resistant, will not be muddy at 130 DEG C of stratum, no precipitating, can be with
It is effective to play the effect for reducing interfacial tension, pass through compound, the formation of anionic surfactant and Gemini surface active agent
Oil displacement agent interfacial tension it is lower, can be used for low pressure, hypotonic, high temperature, oil field with high salt, have broad spectrum activity；
(3) oil displacement agent of the invention can combine closely with the sulfur component in viscous crude, preferably play wettability reversal and
Reducing crude oil viscosity acts on, therefore the viscosity of viscous crude can be significantly reduced under the use condition of low concentration, improves recovery ratio；
(4) present invention is using lignosulfonates, two kinds of sulfonate of aliphatic alcohol polyoxyethylene sulfonate and xanthan gum
Compounding, improves the stability of oil displacement agent, is not in precipitating, not muddy, saline-alkaline tolerance is good.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is oil-producing in the oil displacement agent injection well of the preparation of the embodiment of the present invention 2, produces liquid and plot of water cut figure.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical solution of the present invention will be carried out below
Detailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiment belongs to the range that the present invention is protected.
Embodiment 1
The oil displacement agent of the present embodiment is made of the following raw material: sodium lignin sulfonate 10kg, fatty alcohol polyoxyethylene ether sulfonic acid
Magnesium 10kg, xanthan gum 8kg, N, the bis- fatty dodecanoyl ethylene diamine dipropionic acid sodium 20kg of N '-, lauryl sodium sulfate 10kg, just
Butanol 10kg and water 40kg, wherein fatty alcohol polyoxyethylene ether sulfonic acid magnesium is C15Fatty alcohol polyoxyethylene ether sulfonic acid magnesium.
The preparation method of oil displacement agent of the invention, includes the following steps:
(1) it is weighed respectively according to the weight of each raw material spare；
(2) at normal temperature, sodium lignin sulfonate and fatty alcohol polyoxyethylene ether sulfonic acid magnesium have been added in water, have been heated,
Keeping temperature is 40 DEG C, stirs evenly, obtains mixed solution A；
(3) by spare N, the bis- fatty dodecanoyl ethylene diamine dipropionic acid sodium of N '-and lauryl sodium sulfate are added to institute
In the n-butanol stated, heating, keeping temperature is 45 DEG C, stirs evenly, obtains mixed solution B；
(4) mixed solution A is added slowly in the mixed solution B, xanthan gum is then added, stirs evenly,
Obtain the high efficiency composition oil displacement agent.
Embodiment 2
The oil displacement agent of the present embodiment is made of the following raw material: calcium lignosulfonate 13kg, fatty alcohol polyoxyethylene ether sulfonic acid
Potassium 15kg, xanthan gum 10kg, N, the bis- fatty dodecanoyl ethylene diamine dipropionic acid sodium 23kg of N '-, neopelex 12kg,
N-butanol 12kg and water 45kg, fatty alcohol polyoxyethylene ether sulfoacid calcium are C16Fatty alcohol polyoxyethylene ether sulfoacid calcium.
The preparation method of oil displacement agent of the invention, includes the following steps:
(1) it is weighed respectively according to the weight of each raw material spare；
(2) at normal temperature, calcium lignosulfonate and fatty alcohol polyoxyethylene ether potassium sulfonate have been added in water, have been heated,
Keeping temperature is 45 DEG C, stirs evenly, obtains mixed solution A；
(3) by spare N, the bis- fatty dodecanoyl ethylene diamine dipropionic acid sodium of N '-and lauryl sodium sulfate are added to institute
In the n-butanol stated, heating, keeping temperature is 50 DEG C, stirs evenly, obtains mixed solution B；
(4) mixed solution A is added slowly in the mixed solution B, xanthan gum is then added, stirs evenly,
Obtain the high efficiency composition oil displacement agent.
Embodiment 3
The oil displacement agent of the present embodiment is made of the following raw material: sodium lignin sulfonate 15kg, fatty alcohol polyoxyethylene ether sulfonic acid
Sodium 20kg, xanthan gum 12kg, N, the bis- fatty dodecanoyl ethylene diamine dipropionic acid sodium 25kg of N '-, lauryl sodium sulfate 15kg, just
Butanol 14kg and water 50kg, wherein polyoxyethylene fatty alkyl ether sulfonate C17Polyoxyethylene fatty alkyl ether sulfonate.
The preparation method of oil displacement agent of the invention, includes the following steps:
(1) it is weighed respectively according to the weight of each raw material spare；
(2) at normal temperature, sodium lignin sulfonate and polyoxyethylene fatty alkyl ether sulfonate have been added in water, have been heated,
Keeping temperature is 50 DEG C, stirs evenly, obtains mixed solution A；
(3) by spare N, the bis- fatty dodecanoyl ethylene diamine dipropionic acid sodium of N '-and lauryl sodium sulfate are added to institute
In the n-butanol stated, heating, keeping temperature is 55 DEG C, stirs evenly, obtains mixed solution B；
(4) mixed solution A is added slowly in the mixed solution B, xanthan gum is then added, stirs evenly,
Obtain the high efficiency composition oil displacement agent.
Comparative example 1
The preparation method of the oil displacement agent of this comparative example is same as Example 2, the difference is that, do not add xanthan gum.
Test example 1
The evaluation of oil displacement agent interfacial tension: the oil displacement agent of Example 2 and the preparation of comparative example 1 carries out boundary under various concentration
The measurement of face tension, the results are shown in Table 1, as can be seen from the table, when oil displacement agent concentration of the invention is greater than 0.3% with dense
The increase interfacial tension reduction of degree is not obvious, and shows that oil displacement agent of the invention can reach using lower concentration compared with lower bound
The effect of face tension, the oil displacement agent without adding xanthan gum is unobvious as the increase interfacial tension of concentration reduces, and use is higher
The interfacial tension that reduces of concentration it is also undesirable, it is seen that be added after xanthan gum through the synergistic effects of various substances, play use
The oil displacement agent of low concentration can have the function that compared with low interfacial tension.
Table 1
The oil displacement agent that the present inventor also prepares embodiment 1 and 3 has done above-mentioned test, as a result almost the same, due to length
It is limited, no longer list one by one.
Test example 2
Oil displacement agent coreflooding experiment result
Oil displacement agent concentration selection 0.3%, is tested under the conditions of different temperature, first by after rock core saturated oils, uses water
Be driven to aqueous 90% or more, later using embodiment 2 prepare displacement of reservoir oil agent solution inject at different temperature respectively, then into
Row subsequent waterflooding, the results are shown in Table 2.It is as can be seen from Table 2 0.4% in oil displacement agent concentration, with the continuous raising of temperature,
Recovery ratio constantly increases, and illustrates that oil displacement agent oil displacement efficiency of the invention is preferable, and temperature reaches 95 DEG C, and recovery ratio becomes in what is risen
Gesture, it can be determined that oil displacement agent has preferable temperature tolerance at 95 DEG C of temperature.
Table 2
Test example 3
Oil displacement agent prepared by embodiment 2 is injected into 75 well groups of merchant in June, 2017, oil-producing produces liquid and moisture content such as Fig. 1
Shown, as can be seen from the figure at injection initial stage, the oil production variation of oil well is smaller, obvious in the part of in September, 2017 variation, directly
To in December, 2017, oil-producing, the Liquid output of the well group are substantially at stable state, and moisture content is from injection initial stage in the shape risen
State has downward trend until in December, 2017.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of high efficiency composition oil displacement agent, which is characterized in that the oil displacement agent is made of the following raw material: lignosulfonates,
Aliphatic alcohol polyoxyethylene sulfonate, xanthan gum, Gemini surface active agent, anionic surfactant, organic solvent and water.
2. a kind of high efficiency composition oil displacement agent according to claim 1, which is characterized in that according to parts by weight, the displacement of reservoir oil
Agent is made of the following raw material: lignosulfonates 10-15 parts by weight, aliphatic alcohol polyoxyethylene sulfonate 10-20 parts by weight, Huang
Virgin rubber 8-12 parts by weight, Gemini surface active agent 20-25 parts by weight, anionic surfactant 10-15 parts by weight, organic solvent
10-14 parts by weight and water 40-50 parts by weight.
3. a kind of high efficiency composition oil displacement agent according to claim 2, which is characterized in that according to parts by weight, the displacement of reservoir oil
Agent is made of the following raw material: 13 parts by weight of lignosulfonates, 15 parts by weight of aliphatic alcohol polyoxyethylene sulfonate, xanthan gum 10
Parts by weight, 23 parts by weight of Gemini surface active agent, 12 parts by weight of anionic surfactant, 12 parts by weight of organic solvent and water 45
Parts by weight.
4. high efficiency composition oil displacement agent according to claim 1 to 3, which is characterized in that the lignin sulfonic acid
Sulfonate in salt and the aliphatic alcohol polyoxyethylene sulfonate is sodium salt, sylvite, calcium salt or magnesium salts.
5. high efficiency composition oil displacement agent according to claim 1 to 3, which is characterized in that the fatty alcohol polyoxy
Ethylene ether sulfonate is C15-C17Aliphatic alcohol polyoxyethylene sulfonate.
6. high efficiency composition oil displacement agent described in -5 any one according to claim 1, which is characterized in that the Shuangzi surface is living
Property agent be N, the bis- fatty dodecanoyl ethylene diamine dipropionic acid sodium of N '-, the anionic surfactant is dodecyl sulphate
Sodium or neopelex.
7. high efficiency composition oil displacement agent described in -6 any one according to claim 1, which is characterized in that the organic solvent is
N-butanol.
8. a kind of preparation method of high efficiency composition oil displacement agent described in claim 1-7 any one, which is characterized in that described
Preparation method includes the following steps:
(1) it is weighed respectively according to the weight of each raw material spare；
(2) at normal temperature, lignosulfonates and aliphatic alcohol polyoxyethylene sulfonate have been added in water, have been heated, stirring
Uniformly, mixed solution A is obtained；
(3) spare Gemini surface active agent and anionic surfactant are added in the organic solvent, heating is stirred
It mixes uniformly, obtains mixed solution B；
(4) mixed solution A is added slowly in the mixed solution B, xanthan gum is then added, stirs evenly, obtains
The high efficiency composition oil displacement agent.
9. the preparation method of high efficiency composition oil displacement agent according to claim 8, which is characterized in that heating temperature in step (2)
Degree is 40-50 DEG C.
10. the preparation method of high efficiency composition oil displacement agent according to claim 8, which is characterized in that heating temperature in step (3)
Degree is 45-55 DEG C.
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| 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 |
| CN115386358A (en) * | 2022-06-30 | 2022-11-25 | 常州大学 | Natural surfactant compound system and preparation method thereof |
| CN115386358B (en) * | 2022-06-30 | 2023-08-08 | 常州大学 | Natural surfactant compound system and preparation method thereof |
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