CN1326970C - Oil-displacing agent and production thereof - Google Patents
Oil-displacing agent and production thereof Download PDFInfo
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- CN1326970C CN1326970C CNB200610065241XA CN200610065241A CN1326970C CN 1326970 C CN1326970 C CN 1326970C CN B200610065241X A CNB200610065241X A CN B200610065241XA CN 200610065241 A CN200610065241 A CN 200610065241A CN 1326970 C CN1326970 C CN 1326970C
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- oil
- displacing agent
- displacement agent
- oil displacement
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Abstract
The present invention relates to an oil displacement agent and a preparing method thereof. The oil displacement agent belongs to a chemical oil displacement agent used for tertiary oil recovery. The oil displacement agent is composed of 40% to 80% of total mass of petroleum sulfonate and 20% to 60% of total mass of modification silicon dioxide, and the petroleum sulfonate and the modification silicon dioxide react for 1 to 3 hours under a temperature of 30 DEG C to 90 DEG C in a reaction still. The oil displacement agent is used for oil displacement experiments, when the dosage of the oil displacement agent is 0.4% (mass), oil-water interface tension can be reduced to be smaller than 1*10<-4>mN/m. Owing to the reduction of the oil-water interface tension, the oil displacement agent efficiently reduces the adhesion work of residual oil, and the residual oil is easy to deform, move and strip. Meanwhile, the oil-water interface tension is reduced, so the capillary resistance is eliminated, the required work of interface deformation when oil droplets move through narrow holes is reduced, and the oil droplets are easy to pass through throats and are favorable for moving and coalescence. The oil displacement agent effectively increases the oil displacement efficiency of crude oil, so the recovery efficiency of the crude oil is increased. The oil displacement agent has good compatibility with oil reduction and low price, and the oil displacement agent can be widely used for removing oil in oil fields.
Description
Technical field
The present invention relates to a kind of dose of oil-displacing agent and preparation method thereof, it is to belong to a kind of chemical oil displacement agent that uses in the tertiary oil recovery.
Background technology
Along with rapid economy development, China is increasing to the demand of crude oil, and according to statistics, the crude oil total quantity consumed of Chinese last year has reached 2.7 hundred million tons, and wherein the net importation amount surpasses 100,000,000 tons, accounts for 30% of aggregate consumption; According to experts' analysis, if the crude oil import amount of a country surpasses 30% of aggregate consumption, then International Crude Oil will influence the development and national economy of this state; On the other hand, the rate of growth of crude oil demand amount is substantially exceeded the rate of growth of crude production rate along with countries in the world, and under the influence of factors such as International Politics, economy, military affairs, crude oil price is constantly soaring, reached 70 dollars/barrel at present: therefore, crude oil has become an important factor of restriction Chinese Economy Development.
In order to reduce the influence of International Crude Oil to Chinese Economy Development, keep economic sustainable growth, employ new technology, improve the recovery ratio of existing crude oil, increase crude production rate, become the Chinese task of top priority.
At present, the oil-displacing agent of using on the oil field mainly is a petroleum sulfonate surfactant, it because have that surfactivity is strong, the source is wide, good with the oil reservoir compatibleness, that production technique is simple, cost is low etc. is former thereby obtained using widely.But petroleum sulfonate surfactant generally can only reduce oil water interfacial tension to 10
-2MNm
-1The order of magnitude, the requirement that does not reach the required super oil water interfacial tension of the displacement of reservoir oil.
In order to obtain to have the oil-displacing agent of ultralow oil water interfacial tension, improve the recovery ratio of crude oil.A lot of to this research both at home and abroad.Generally adopt the method preparation displacing surfactant system that adds low-carbon alcohol at present, but the chromatographic separation on stratum makes its forfeiture oil-displacement capacity.There is the scholar once to adopt xylogen to make sacrifice agent in recent years, allocates urea, hexametaphosphate into flooding system,, reduce adsorption losses to improve the salt resistance of flooding system.In oil displacement process, bring into play bigger effect in order to make tensio-active agent, adopt mixed surfactant system to replace single surfactant, use different tensio-active agents to carry out the composite system character of optimizing, to utilize the synergistic effect (synergism) between the tensio-active agent.The synergistic effect of on Can J Chem Eng magazine, mentioning between sulfonated lignin and the sulfonated petro-leum in 1980,81,82 years as people such as Neale, Homof; Mentioning in oil recovery chemistry one book that Zhao Fulin writes carries out ether carboxylate and sulfonated petro-leum composite; People such as Huang Hongdu mention that petroleum carboxylate and sulfonate compound system can produce synergistic effect in the paper that oilfield chemistry in 2000 and Jianghan Petroleum College's journal etc. are delivered; People such as Wang Shuyin calendar year 2001 special reservoirs publish thesis causing, carried out naphthenate and sulfonated petro-leum composite; PetroChina Company Limited. exploration institute and related research units began to reduce oil water interfacial tension with U.S. joint study exploitation and have reached 10 before 2 years
-4MN.m
-1The super tensio-active agent of the order of magnitude, but cost is higher, does not still have formal product to use at present.But traditional oil-displacing agent is in order to pursue low oil water interfacial tension, do not pay attention to reservoir geologic character and crude oil property condition, so, generally when using tensio-active agent, added a certain amount of alkali (NaOH) or polymkeric substance therein, the adding of NaOH or polymkeric substance can make that oil water interfacial tension lowers; But, because NaOH or polymkeric substance are adsorbed in a large number, having stopped up the duct, stratum in the stratum, the result has but destroyed stratal configuration, and further exploitation has been brought great difficulty.
Summary of the invention
Technical scheme of the present invention: this oil-displacing agent accounts for 40%～80% and improved silica of total mass by sulfonated petro-leum, accounts for about 20%～60% of total mass and is composited.Owing to used sulfonated petro-leum is that crude oil by this oil field or block makes through oversulfonate, so this sulfonated petro-leum possesses relatively good, cheap and easy to get, the interfacial activity advantages of higher of compatibleness of oil reservoir; Again because the improved silica manufacture craft is simple, cheap; Therefore this oil-displacing agent possesses cheap, advantages such as interfacial activity is high,, anti-salt good with the oil reservoir compatibleness.
The production technique of improved silica mainly contains two kinds: first kind is that improved silica is directly prepared to come by sol-gel method by water glass and organic modifiers; Second method is to prepare nano SiO 2 particle by tetraethoxy or silicate by sol-gel method earlier, and then the adding organic modifiers carries out organically-modified being prepared to nano SiO 2 particle.Wherein organic modifiers is plurality of silane coupling agents, C
8～C
18Halohydrocarbon, carbochain number be C
8～C
18Higher fatty acid or all kinds of carboxylic acid derivative etc.
Oil-displacing agent is the preparation method may further comprise the steps:
1) account for 40%～80% of total mass by sulfonated petro-leum, improved silica accounts for 20%～60% of total mass, and its surplus is the ratio of water, joins in the reactor;
2) rising reactor temperature to 30 ℃～90 ℃ keeps this temperature of reaction;
3) the uninterrupted stirring reacted 1～3 hour, promptly obtained this oil-displacing agent.
There are very big difference in the oil-displacing agent of the used for tertiary oil recovery of the present invention's design and traditional oil-displacing agent.Oil-displacing agent of the present invention is that improved silica and the sulfonated petro-leum of widespread use on the oil field are composited, it does not need to add alkali (NaOH etc.), polymkeric substance or other pure auxiliary agent, it is acted on the profit system separately just oil water interfacial tension can be reduced to 10
-4MNm
-1Below the order of magnitude.
Useful oil displacement efficiency of the present invention: when this oil-displacing agent was applied to the oil field displacement of reservoir oil, its consumption was 0.4%～0.8% (quality), and usage quantity is little, so cost is low; When consumption is 0.4% (quality), i.e. 4000mgL
-1, can reduce oil water interfacial tension in the profit system significantly, interfacial tension can drop to 1 * 10
-4MNm
-1Below.
Description of drawings
Fig. 1 is this oil-displacing agent structure iron.Among the figure: R
1Be organic modifiers, R
2-SO
3H is a sulfonated petro-leum.
Embodiment
Embodiment one:
The preparation of oil-displacing agent: in reactor, add PS-01A sulfonated petro-leum 40%, improved silica 40% and water 20%; Rising reactor temperature to 30 ℃ keeps this temperature of reaction; The uninterrupted stirring, the reaction times is 3 hours, obtains this oil-displacing agent.
The application of this oil-displacing agent: the total mass of oil-displacing agent is 0.4%, i.e. 4000mgL
-1The profit system is Gudao crude and mineralized water; Testing used instrument is the tx-500 interfacial tensimeter of U.S. young tiger dimension company development, and probe temperature is 70 ℃, and rotating speed is 5000 rev/mins.
Reduce the situation of oil water interfacial tension: what descend when the interfacial tension between this oil-displacing agent solution and isolated island profit system begins is very fast, can enter 10 at 5min
-4MNm
-1The order of magnitude; Along with the prolongation of time, oil water interfacial tension continues to reduce, and just can reach minimum about 7 minutes, and minimum oil water interfacial tension can reach 1 * 10
-4MNm
-1
Embodiment two:
The preparation of oil-displacing agent: in reactor, add PS-01 sulfonated petro-leum 50%, improved silica 30% and water 20%; Rising reactor temperature to 50 ℃ keeps this temperature of reaction; The uninterrupted stirring, the reaction times is 2 hours, obtains this oil-displacing agent.
The application of this oil-displacing agent: the total mass of oil-displacing agent is 0.5%, i.e. 5000mgL
-1The profit system is Gudao crude and mineralized water; Testing used instrument is the tx-500 interfacial tensimeter of U.S. young tiger dimension company development, and probe temperature is 70 ℃, and rotating speed is 5000 rev/mins.
Reduce the situation of oil water interfacial tension: the interfacial tension between this oil-displacing agent and isolated island profit system just can reach minimum about 11 minutes, minimum oil water interfacial tension also can reach 1 * 10
-4MNm
-1About.
Embodiment three:
The preparation of oil-displacing agent: in reactor, add PS-01A sulfonated petro-leum 60%, improved silica 20% and water 20%; Rising reactor temperature to 70 ℃ keeps this temperature of reaction; The uninterrupted stirring, the reaction times is 1 hour, obtains this oil-displacing agent.
The application of this oil-displacing agent: the total mass of oil-displacing agent is 0.6%, i.e. 6000mgL
-1The profit system is shop four crude oil and mineralized water; Testing used instrument is the tx-500 interfacial tensimeter of U.S. young tiger dimension company development, and probe temperature is 70 ℃, and rotating speed is 5000 rev/mins.
Reduce the situation of oil water interfacial tension: the interfacial tension between this oil-displacing agent and shop four profit systems is minimum to reach 6 * 10
-5MNm
-1, and within 5 minutes, just can reach minimum.
Embodiment four:
The preparation of oil-displacing agent: in reactor, add PS-01A sulfonated petro-leum 40%, improved silica 50% and water 10%; Rising reactor temperature to 90 ℃ keeps this temperature of reaction; The uninterrupted stirring, the reaction times is 1 hour, obtains this oil-displacing agent.
The application of this oil-displacing agent: the total mass of oil-displacing agent is 0.6%, i.e. 6000mgL
-1The profit system is lonely six crude oil and mineralized water; Testing used instrument is the tx-500 interfacial tensimeter of U.S. young tiger dimension company development, and probe temperature is 70 ℃, and rotating speed is 5000 rev/mins.
Reduce the situation of oil water interfacial tension: the interfacial tension between this oil-displacing agent and lonely six profit systems is minimum to reach 6 * 10
-5MNm
-1, and within 7 minutes, just can reach minimum.
By specific embodiment as can be seen, oil-displacing agent of the present invention can reduce oil water interfacial tension significantly, generally can both reach 10
-4MNm
-1The order of magnitude, minimum interfacial tension can reach 6 * 10
-5MNm
-1, this displacement of reservoir oil simultaneously is cheap and easy to get with super tensio-active agent, wide material sources, good with the oil reservoir compatibleness, therefore can be widely used in the oil field displacement of reservoir oil.
Oil-displacing agent oil-displacement mechanism of the present invention is:
The oil-displacing agent hydrophilic radical is hydroxyl or sulfonic group, and lipophilic group is the hydrocarbon chain of organic modifiers or sulfonated petro-leum, sees accompanying drawing 1.Owing on the nano SiO 2 particle surface, form a plurality of hydrophilic and a plurality of lipophilic groups, and glomeration micelle, so this tensio-active agent belongs to many sub-surface promoting agent of the many hydrophobic groups of many hydrophilic groups, reduced the interfacial tension between the profit to a great extent, because oil water interfacial tension has obtained significant reduction, thereby reduced the work of adhesion of surplus oil effectively, reduced oil reservoir and drawn back required work of adhesion, made that irreducible oil is easily deformable, move, peel off from rock; Simultaneously, reduce oil water interfacial tension and can effectively eliminate the capillary resistance, reduced oil droplet, make oil droplet, help migration, the coalescence of oil droplet easily by venturi by the required merit of the portable interface deformation in narrow aperture; A large amount of oil droplets move and uniting subsequently is the prerequisite that forms oily wall, known high interfacial tension has stoped the associating of oil droplet, and low interfacial tension has promoted this associating.Therefore, the reduction of oil water interfacial tension makes the displacement efficiency of crude oil obtain significant raising, thereby improves the recovery ratio of crude oil effectively.
Claims (6)
1. an oil-displacing agent is characterized in that, it is composited by following component:
A) sulfonated petro-leum accounts for 40%～80% of total mass;
B) improved silica accounts for 20%～60% of total mass;
C) its surplus is a water.
2. oil-displacing agent according to claim 1 is characterized in that, used sulfonated petro-leum is produced crude production by this oil field and block and obtains.
3. oil-displacing agent according to claim 1 is characterized in that, improved silica is directly prepared by sol-gel method by water glass and organic modifiers; Perhaps be prepared from the organic modifiers modified-reaction by nanometer grade silica.
4. oil-displacing agent according to claim 3 is characterized in that, organic modifiers is plurality of silane coupling agents, C
8～C
18Halohydrocarbon, carbochain number be C
8～C
18Higher fatty acid or all kinds of carboxylic acid derivative in a kind of.
5. oil-displacing agent according to claim 3 is characterized in that, nanometer grade silica is to be come by the sol-gel method preparation by tetraethoxy or silicate.
6. the preparation method of the described oil-displacing agent of claim 1 is characterized in that, this preparation method may further comprise the steps:
1) account for 40%～80% of total mass by sulfonated petro-leum, improved silica accounts for 20%～60% of total mass, and its surplus is the ratio of water, joins in the reactor;
2) rising reactor temperature to 30 ℃～90 ℃ keeps this temperature of reaction;
3) the uninterrupted stirring reacted 1～3 hour, promptly obtained this oil-displacing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610065241XA CN1326970C (en) | 2006-03-21 | 2006-03-21 | Oil-displacing agent and production thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610065241XA CN1326970C (en) | 2006-03-21 | 2006-03-21 | Oil-displacing agent and production thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1818008A CN1818008A (en) | 2006-08-16 |
| CN1326970C true CN1326970C (en) | 2007-07-18 |
Family
ID=36918215
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200610065241XA Expired - Fee Related CN1326970C (en) | 2006-03-21 | 2006-03-21 | Oil-displacing agent and production thereof |
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| CN (1) | CN1326970C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101570686A (en) * | 2009-05-25 | 2009-11-04 | 胜利油田胜利工程设计咨询有限责任公司 | Nanometer silicon dioxide modified sulphonate oil-displacing agent and preparation method thereof |
| CN103937478B (en) * | 2014-04-16 | 2017-02-22 | 东北石油大学 | Preparation method of nanofluid for improving oil recovery |
| CN106010493A (en) * | 2016-05-25 | 2016-10-12 | 中国石油大学(北京) | Composite oil displacement agent as well as preparation method and application thereof |
| EP3545048A1 (en) * | 2016-11-23 | 2019-10-02 | BP Exploration Operating Company Limited | Oil recovery method |
| CN110016329B (en) * | 2019-05-14 | 2021-02-26 | 西南石油大学 | High-temperature high-salinity oil reservoir in-situ emulsification system and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1696240A (en) * | 2005-05-27 | 2005-11-16 | 北京交通大学 | Chemical oil displacement agent |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1696240A (en) * | 2005-05-27 | 2005-11-16 | 北京交通大学 | Chemical oil displacement agent |
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Granted publication date: 20070718 Termination date: 20100321 |