CN102942909B - Application of single surfactant in ultra low permeability reservoir oil deposit chemical displacement of reservoir oil - Google Patents
Application of single surfactant in ultra low permeability reservoir oil deposit chemical displacement of reservoir oil Download PDFInfo
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- CN102942909B CN102942909B CN201210488382.8A CN201210488382A CN102942909B CN 102942909 B CN102942909 B CN 102942909B CN 201210488382 A CN201210488382 A CN 201210488382A CN 102942909 B CN102942909 B CN 102942909B
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Abstract
The invention discloses application of a single surfactant N-alkyl-1 and omega-alkyl-diamine (CmNnN) in ultra low permeability reservoir oil deposit chemical displacement of reservoir oil. The N-alkyl-1 and the omega-alkyl-diamine (CmNnN) can form wormlike micelle in water solution to improve injected water viscosity and be favorable for improving crude oil recovery rate. An oil displacing agent is a single surfactant system, enables tension of crude oil/ water interface to be reduced to ultra low point, overcomes chromatograph effect and guarantees stable oil displacing efficiency.
Description
Technical field
The present invention relates to the application of a kind of single surfactant flooding agent in extra-low permeability oil reservoirs reservoir Oil extraction process, belong to interfacial chemistry technical field.
Background technology
It is little that extra permeability oilfield is exploited abroad, in the exploitation in China oil field, but account for consequence, as the oil gas ultimate production in the long celebrating oil field taking extra-low permeability oil reservoirs reservoir as feature in 2010 has reached 3,500 ten thousand tons, become domestic second largest oil field, in from now on several years, oil gas ultimate production will break through 5,000 ten thousand tons.From correlative study data, the oil bearing reservoir rate of permeation abroad low-permeability oil deposit reservoir exploitation being related to is 1 ~ 3mD, and the minimum rate of permeation of long celebrating oil field oil bearing reservoir is only 0.3mD.To extra-low permeability oil reservoirs reservoir exploitation, interfacial tension, the viscosity of injected water, capillary force between physical property (viscosity, density, composition etc.), the oil/water of the wettability of oil bearing reservoir rock (hydrophilic, oleophylic, slightly water-wet, slightly oil-wet) and chargeding performance, crude oil have important impact to the tar productivity of crude oil.
Polymkeric substance and tensio-active agent complex oil displacing technology are current a kind of important means for the Oil extraction of extra-low permeability oil reservoirs reservoir.On the one hand, polymkeric substance can increase aqueous viscosity, improves oil/water mobility ratio, and then improves macroscopical sweep efficiency, and this is conducive to improve the recovery ratio of crude oil.In addition, the visco-elasticity of polymers soln has changed the strained condition of polymers soln in duct, has increased the flow velocity of salient angle inner fluid, and the effect of oil film is strengthened and can increase carrying capacity, is conducive to improve oil displacement efficiency.On the other hand, tensio-active agent can adsorb and reduce the interfacial tension between crude oil/water on oil/water interface, and this also contributes to improve the recovery ratio of crude oil.
But there is the obstruction to reservoir pore, the hidden danger of large-area destruction crude oil reservoir in the ultra-low permeability reservoir displacement of reservoir oil in the polymkeric substance of the ultra-high molecular weight of current use.In addition, currently used oil-displacing agent system generally all utilizes Recompounded multielement system to reduce crude oil/water interfacial tension, there is strong chromatographic fractionation effect to Recompounded multielement oil-displacing agent system in the geologic condition special due to extra-low permeability oil reservoirs reservoir, thereby causes Recompounded multielement system not get a desired effect.Therefore, exploitation can be avoided chromatographic fractionation effect, the oil-displacing agent system that possesses ultra low interfacial tension has great importance and be worth improving extra-low permeability oil reservoirs reservoir oil recovery factor.
Tensio-active agent vermiculate glues system not only has the crude oil/water of reduction interfacial tension, and can improve the viscosity of aqueous systems.Therefore, tensio-active agent vermiculate glues system has had both the technical characterstic of polymkeric substance and tensio-active agent combination flooding two aspects in a sense simultaneously.Although reported the surfactant system that can form in a large number vermiculate glues in document, this type of system is mostly mixed surfactant system as tensio-active agent and hydrophilic growth substance compound system, or has the surfactant system of high density electrolysis matter.Up to the present, there is no the relevant report of single tensio-active agent worm-shaped micellar flooding agent system.
Summary of the invention
Technical problem to be solved by this invention is the deficiency that overcomes existing polymkeric substance and the existence of tensio-active agent complex oil displacing technology, and the application of a kind of single surfactant flooding agent system in extra-low permeability oil reservoirs reservoir Oil extraction process is provided.
The present invention for the technical scheme providing is provided is: N-alkyl-1, and ω-alkyl diamine is the application in ultra-low permeability reservoir oil reservoir as chemical oil displacement agent, described N-alkyl-1, the concrete general formula of ω-alkyl diamine is as follows:
In general formula, m=8 ~ 14; N=2 ~ 4.
N-alkyl-1 that described oil-displacing agent system is 0.05% ~ 0.3%, ω-alkyl diamine aqueous solution.
With when prepolymer compared with tensio-active agent combination flooding technology, advantage of the present invention is mainly reflected in following several aspect:
1. oil-displacing agent system involved in the present invention can be down to 2 × 10 by crude oil/water interfacial tension
-2below mN/m, be conducive to improve the recovery ratio of crude oil;
2. the present invention uses the tensio-active agent of one-component, can avoid the unsettled problem of oil displacement efficiency causing due to chromatographic fractionation effect;
3. the tensio-active agent that the present invention uses can form vermiform micella in the aqueous solution, can improve the viscosity of oil-displacing agent aqueous systems, contributes to improve oil displacement efficiency and can avoid the impact of polymkeric substance on crude oil reservoir;
4. the tensio-active agent that the present invention uses has good saline-alkaline tolerance.
Brief description of the drawings
Fig. 1 is during for provide in embodiment 3 50 DEG C, 0.05%C
12n
3the 0.3%C that N provides in crude oil/injected water and embodiment 5
12n
3n schemes over time at crude oil/high calcium water termination tension force.
Embodiment
By the following examples the present invention is described further, but does not limit the present invention in any way.
Embodiment 1
Testing tool: interfacial tensimeter, 5000rpm are dripped in the German Kr ü ss SITE100 of company rotation;
Probe temperature: 25 DEG C;
Crude oil: long celebrating China-201, oil field;
Water: by the injected water of standard composition configuration, total ion concentration is 4272.45mg/L;
Oil-displacing agent system: 0.3% C
14n
2the injected water solution of N;
Equilibrium interfacial tension: 2.0 × 10
-2mN/m.
Embodiment 2
Testing tool: interfacial tensimeter, 5000rpm are dripped in the German Kr ü ss SITE100 of company rotation;
Probe temperature: 50 DEG C;
Crude oil: the long oil field China 201 that celebrates;
Water: by the injected water of standard composition configuration, total ion concentration is 4272.45mg/L;
Oil-displacing agent system: 0.05% C
8n
4the injected water solution of N;
Equilibrium interfacial tension: 2 × 10
-2mN/m.
Embodiment 3
Testing tool: interfacial tensimeter, 5000rpm are dripped in the German Kr-ü ss SITE100 of company rotation;
Probe temperature: 50 DEG C;
Crude oil: the long oil field China 201 that celebrates;
Water: by the injected water of standard composition configuration, total ion concentration is 4272.45mg/L;
Oil-displacing agent system: 0.05% C
12n
3the injected water solution of N;
Equilibrium interfacial tension: 7.5 × 10
-3mN/m.
As shown in Figure 1, N-alkyl-1, ω-alkyl diamine possesses the ability that reduces crude water interfacial tension as the system of chemical oil displacement agent.
Embodiment 4
Testing tool: interfacial tensimeter, 5000rpm are dripped in the German Kr ü ss SITE100 of company rotation;
Probe temperature: 70 DEG C;
Crude oil: the long oil field China 201 that celebrates;
Water: by the injected water of standard composition configuration, total ion concentration is 4272.45mg/L;
Oil-displacing agent system: 0.3% C
12n
3the injected water solution of N.
Equilibrium interfacial tension: 9.5 × 10
-3mN/m
Embodiment 5
Testing tool: interfacial tensimeter, 5000rpm are dripped in the German Kr ü ss SITE100 of company rotation;
Probe temperature: 50 DEG C;
Crude oil: the long oil field China 201 that celebrates;
Water: high calcium water, NaCl and CaCl
2mixed aqueous solution, wherein m
naCl/ m
caCl2=4/6, total ion concentration is 40000mg/L;
Oil-displacing agent system: 0.3% C
12n
3the injected water solution of N.
Equilibrium interfacial tension: 8.4 × 10
-3mN/m
As shown in Figure 1, N-alkyl-1, ω-alkyl diamine possesses the ability that reduces crude water interfacial tension as the system of chemical oil displacement agent.
Claims (2)
1.N-alkyl-1, ω-alkyl diamine is the application in ultra-low permeability reservoir oil reservoir as chemical oil displacement agent, it is characterized in that, described N-alkyl-1, the concrete general formula of ω-alkyl diamine is as follows:
In general formula, m=8 ~ 14; N=2 ~ 4.
2. N-according to claim 1 alkyl-1, ω-alkyl diamine is the application in ultra-low permeability reservoir oil reservoir as chemical oil displacement agent, it is characterized in that: N-alkyl-1 that described oil-displacing agent system is 0.05% ~ 0.3%, ω-alkyl diamine aqueous solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210488382.8A CN102942909B (en) | 2012-11-26 | 2012-11-26 | Application of single surfactant in ultra low permeability reservoir oil deposit chemical displacement of reservoir oil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210488382.8A CN102942909B (en) | 2012-11-26 | 2012-11-26 | Application of single surfactant in ultra low permeability reservoir oil deposit chemical displacement of reservoir oil |
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| CN102942909A CN102942909A (en) | 2013-02-27 |
| CN102942909B true CN102942909B (en) | 2014-11-26 |
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| CN201210488382.8A Expired - Fee Related CN102942909B (en) | 2012-11-26 | 2012-11-26 | Application of single surfactant in ultra low permeability reservoir oil deposit chemical displacement of reservoir oil |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4239630A (en) * | 1978-11-29 | 1980-12-16 | Standard Oil Company (Indiana) | Method for dissolving sulfur deposits rapidly |
| US4290900A (en) * | 1979-05-29 | 1981-09-22 | Standard Oil Company (Indiana) | Method and composition for removing elemental sulfur from high temperature, high pressure wells and flow lines |
| CN1560177A (en) * | 2004-02-25 | 2005-01-05 | 石油大学(华东) | High temp. thicking oil viscosity reducing agent and preparation process thereof |
-
2012
- 2012-11-26 CN CN201210488382.8A patent/CN102942909B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4239630A (en) * | 1978-11-29 | 1980-12-16 | Standard Oil Company (Indiana) | Method for dissolving sulfur deposits rapidly |
| US4290900A (en) * | 1979-05-29 | 1981-09-22 | Standard Oil Company (Indiana) | Method and composition for removing elemental sulfur from high temperature, high pressure wells and flow lines |
| CN1560177A (en) * | 2004-02-25 | 2005-01-05 | 石油大学(华东) | High temp. thicking oil viscosity reducing agent and preparation process thereof |
Non-Patent Citations (3)
| Title |
|---|
| 杨俊峰等.N-十二烷基-1，3-丙撑二胺的合成及工艺改进.《精细与专用化学品》.2008,第16卷(第17期), * |
| 烷基二胺的合成;郭生等;《化学试剂》;19980828;第20卷(第04期);234-235、239 * |
| 郭生等.烷基二胺的合成.《化学试剂》.1998,第20卷(第04期), * |
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| CN102942909A (en) | 2013-02-27 |
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Inventor after: Gao Chunning Inventor after: Dong Jinfeng Inventor after: Kang Xingmei Inventor after: Zhang Yongqiang Inventor after: Li Wenhong Inventor after: Li Xuefeng Inventor after: Fan Wei Inventor after: Zhang Hongqiang Inventor after: Yang Die Inventor after: Sun Hualing Inventor after: Cai Yongbin Inventor before: Ran Xinquan Inventor before: Dong Jinfeng Inventor before: Kang Xingmei Inventor before: Gao Chunning Inventor before: Zhang Yongqiang Inventor before: Li Wenhong Inventor before: Li Xuefeng Inventor before: Yu Guangming Inventor before: Yang Die Inventor before: Zhang Hongqiang Inventor before: Cai Yongbin |
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Free format text: CORRECT: INVENTOR; FROM: RAN XINQUAN GAO CHUNNING ZHANG YONGQIANG LI WENHONG LI XUEFENG YU GUANGMING YANG YI ZHANG HONGQIANG CAI YONGBIN DONG JINFENG KANG XINGMEI TO: GAO CHUNNING ZHANG YONGQIANG LI WENHONG LI XUEFENG FAN WEI ZHANG HONGQIANG YANG YI SUN HUALING CAI YONGBIN DONG JINFENG KANG XINGMEI |
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