CN105670589A - Foamer for enhancing crude oil recovery and preparation method thereof - Google Patents
Foamer for enhancing crude oil recovery and preparation method thereof Download PDFInfo
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- CN105670589A CN105670589A CN201511016593.1A CN201511016593A CN105670589A CN 105670589 A CN105670589 A CN 105670589A CN 201511016593 A CN201511016593 A CN 201511016593A CN 105670589 A CN105670589 A CN 105670589A
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- oil recovery
- improving
- whipping agent
- recovery factor
- foam
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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 foamer for enhancing crude oil recovery and a preparation method thereof. The foamer is composed from following substances, by weight, 15-35% of sodium dodecyl benzene sulfonate, 5-10% of AOS, 1-5% of a zwitterionic surfactant, 1-5% of fatty alcohol-polyoxyethylene ether sodium sulfosuccinate, 1-5% of an additive having foam stabilizing performance, and the balanced being water. The foamer is prepared just by uniformly mixing the substances. The preparation method is easy to carry out. The foamer, when being used as foam flooding, is not less than 300% in foaming rate and is not less than 60 min in foam half-life period. The foamer enables oil-water interface tension to reach 10<-3> mN/m.
Description
Technical field
The present invention relates to intensified oil reduction field, particularly relate to a kind of whipping agent for improving oil recovery factor and its preparation method.
Background technology
In the research improving oil recovery, foam flooding is more and more subject to people's attention with the seepage flow of its uniqueness and Oil Displacing Capacity in recent years. On the one hand, owing to foam apparent viscosity is bigger, it is possible to obviously improve water-oil mobility ratio, macroscopic view swept volume is greatly improved; On the other hand, due to the reduction of interfacial tension, it is possible to reduce residual oil saturation, it is to increase microscopic oil displacement efficiency. Therefore, foam flooding a kind of compares promising tertiary oil recovery technology. A large amount of laboratory experiment result shows, foam flooding can improve oil recovery factor about 10%-20% after poly-driving, and becomes the new hope of tertiary oil recovery.
The key factor that foam flooding realizes is the screening of whipping agent. In stratum, the stability of foam seriously have impact on the development of foam flooding, and therefore the research and development emphasis of foam flooding should be: improves the temperature tolerance of foam, extend the persistence of foam, and improves foam flooding and the compatibleness of formation rock fluid.
Summary of the invention
In order to solve the problems of the technologies described above, the present invention provides a kind of whipping agent for improving oil recovery factor and its preparation method, and preparation method is simple, is easy to operation; Frothing percentage >=300% of the whipping agent for improving oil recovery factor obtained, half foam life period >=60min, can make interfacial tension between profit reach 10 simultaneously-3mN/m。
For this reason, the technical scheme of the present invention is as follows:
For improving a whipping agent for oil recovery factor, the weight percent of its composition and each component is:
All the other add water to 100%.
AOS is α olefin sulfonate.
Further, described zwitterionics be in carboxylic acid trimethyl-glycine, Varion CDG-K, N-amide group carboxylic acid trimethyl-glycine, N-alkylthio carboxylic acid trimethyl-glycine and AMONYL 380LC any one or arbitrarily several with arbitrarily than mixture.
Further, described AOS be in C14AOS, C16AOS and C18AOS any one or arbitrarily several with arbitrarily than mixture.
Further, the additive described in stable foam performance be in sorbyl alcohol, Zulkovsky starch, Xylo-Mucine and lauryl alcohol any one or arbitrarily several with arbitrarily than mixture.
Further, described water is tap water.
The described purposes of whipping agent for foam flooding for improving oil recovery factor.
For improving the preparation method of the whipping agent of oil recovery factor it is as mentioned above: by weight percentage Sodium dodecylbenzene sulfonate, AOS, zwitterionics, fatty alcohol-polyoxyethylene ether Disodium sulfosuccinate, the additive with stable foam performance and water are added in the reactor with whipping appts, stirring at room temperature is mixed even, obtains described for improving the whipping agent of oil recovery factor. Preferably, churning time is 1.5～2.5h.
Whipping agent for improving oil recovery factor provided by the invention is the composite foamed system of anion surfactant/zwitterionics of the needs design improving oil recovery for foam flooding, give full play to the synergistic effect of tensio-active agent, reduce liquid phase surface tension, increase intensity and the elasticity of liquid film, make the foam system of formation have good high temperature resistant, salt tolerant, oil resistance.
Advantage and the positively effect of the present invention be:
(1) the formula system of the present invention adopt anion surfactant and zwitterionics composite, α olefin sulfonate wherein not only has outstanding foaming power, also there is the ability significantly reducing oil water interfacial tension, thus can improve the displacement efficiency of foam flooding, increase the elastic energy of the displacement of reservoir oil thus improve foam flooding recovery ratio.
The present invention matching used zwitterionics, additive agent be the fine chemicals of suitability for industrialized production, raw material is easy to get; In addition, the water used in compound system is tap water, also can be return water, and environment protecting is good, low production cost.
(3) whipping agent involved in the present invention when high temperature, high salinity, frothing percentage >=300%, half foam life period >=60min; And the experiment proved that, 150 DEG C, 1500-20000mg/L salinity when, 10 can be formed with crude oil-3MN/m interfacial tension.
Embodiment
Below in conjunction with embodiment, the technical scheme of the present invention is described.
Embodiment 1
For improving a whipping agent for oil recovery factor, its constituent and weight thereof are respectively:
The preparation method of the whipping agent for improving oil recovery factor that the present embodiment provides is: joining in the mixing tank that whipping appts is housed by above-mentioned six kinds of materials, stirring at room temperature 1.5h, must can be used as the whipping agent of foam flooding.
Measuring the present embodiment, to obtain testing method and the result of the frothing percentage of product, half foam life period and interfacial tension as follows:
Foaming dosage 0.4% concentration
Tap water (or return water) detection limit
Crude oil detection limit
(1) interfacial tension measures: use JB-12KD high speed agitator; get the solution 100ml that the foaming agents content that the present embodiment obtains is 0.4wt.%; stir 2 minutes when 8000-9000 rev/min; form stable foam; foam is poured into rapidly 1000ml graduated cylinder, measures foaming volume V, start timing simultaneously; the time for V/2 falls in record lather volume, is half foam life period. Record frothing percentage=450%, half foam life period=120min. Using TX-500C interfacial tensimeter, under speed of rotation 5000 revs/min of conditions, according to " SY/T5370-1999 Surface and interface tension determining method and judgement criteria ", recording minimum interfacial tension is 6 × 10-3mN/m。
(2) adopt the foam solution of oil field stratum water preparation mass concentration 10%, put into take out after aging 48h at 150 DEG C, baking oven and measure whipping agent performance.
Table 1 system resistance to elevated temperatures evaluation experimental data
(3) the anti-absorption property of system measures: product system exists the absorption problem of product in the migration process of oil reservoir, as the fruit product ability that absorption can cause system to reduce interfacial tension in a large number declines, thus reduce oil displacement efficiency, so the anti-adsorptivity of system need to be investigated.
Preparation density of foaming agent is the foaming agent solution of 0.4%, takes 20g reservoir sand and is loaded in test bottle, and before then getting 100ml, the foaming agent solution of preparation adds test bottle; Test bottle is put into 65 DEG C of thermostat containers again, by the test bottle being poured into another sand loading by the foaming agent solution after adsorbing after every 24h, and measures interfacial tension. 24h is primary adsorption, and 48h is secondary absorption, until 96h level Four absorption altogether. Experimental result is as follows:
Table 2 system absorption rear interface tension force experimental data
Above data show, along with the increase of absorption progression, system oil water interfacial tension still can reach 10-3MN/m. System has good anti-adsorptivity.
Embodiment 2
For improving a whipping agent for oil recovery factor, its constituent and weight thereof are respectively:
The preparation method of the whipping agent for improving oil recovery factor that the present embodiment provides is: join in the mixing tank that whipping appts is housed by Sodium dodecylbenzene sulfonate 32.0g, C-18AOS5.0g, C-16AOS3.0g, Varion CDG-K 2.0g, fatty alcohol-polyoxyethylene ether Disodium sulfosuccinate 5.0g, lauryl alcohol 3.0g and tap water 50g, stirring at room temperature 1.5h, must can be used as the whipping agent of foam flooding.
Measuring the present embodiment, to obtain testing method and the result of the frothing percentage of product, half foam life period and interfacial tension as follows:
Foaming dosage 0.4% concentration
Tap water (or return water) detection limit
Crude oil detection limit
(1) interfacial tension measures: use JB-12KD high speed agitator; get the solution 100ml that the foaming agents content that the present embodiment obtains is 0.4wt.%; to stir 2 minutes under 8000-9000 rev/min of condition; form stable foam; foam is poured into rapidly 1000ml graduated cylinder, measures foaming volume V, start timing simultaneously; the time for V/2 falls in record lather volume, is half foam life period. Record frothing percentage=480%, half foam life period=130min. Using TX-500C interfacial tensimeter, under speed of rotation 5000 revs/min of conditions, according to " SY/T5370-1999 Surface and interface tension determining method and judgement criteria ", recording minimum interfacial tension is 5 × 10-3mN/m。
(2) to the foam solution adopting oil field stratum water preparation mass concentration 10%, put into take out after aging 48h at 150 DEG C, baking oven and measure pore forming material performance.
Table 3 system resistance to elevated temperatures evaluation experimental data
(3) the anti-absorption property condition determination of system is with embodiment 1, and test result is as follows:
Table 4 system absorption rear interface tension force experimental data
Above data show, along with the increase of absorption progression, system oil water interfacial tension still can reach 10-3MN/m. System has good anti-adsorptivity.
Embodiment 3
For improving a whipping agent for oil recovery factor, its constituent and weight thereof are respectively:
The preparation method of the whipping agent for improving oil recovery factor that the present embodiment provides is: by Sodium dodecylbenzene sulfonate 30.0g, C-18AOS7.0g, C-16AOS3.0g, Varion CDG-K 2.0g, fatty alcohol-polyoxyethylene ether Disodium sulfosuccinate 5.0g, lauryl alcohol 3.0g and tap water 50g join in the mixing tank that whipping appts is housed, stirring at room temperature 1.5h, must can be used as the whipping agent of foam flooding.
Measure the present embodiment and obtain the frothing percentage of product, half foam life period and interfacial tension:
Foaming dosage 0.4% concentration
Tap water (or return water) detection limit
Crude oil detection limit
(1) interfacial tension measures: use JB-12KD high speed agitator; get the solution 100ml that the foaming agents content that the present embodiment obtains is 0.4wt.%; to stir 2 minutes under 8000-9000 rev/min of condition; form stable foam; foam is poured into rapidly 1000ml graduated cylinder, measures foaming volume V, start timing simultaneously; the time for V/2 falls in record lather volume, is half foam life period. Record frothing percentage=380%, half foam life period=138min. Using TX-500C interfacial tensimeter, under speed of rotation 5000 revs/min of conditions, according to " SY/T5370-1999 Surface and interface tension determining method and judgement criteria ", recording minimum interfacial tension is 3 × 10-3mN/m。
(2) to the foam solution adopting oil field stratum water preparation mass concentration 10%, put into take out after aging 48h at 150 DEG C, baking oven and measure pore forming material performance.
Table 5 system resistance to elevated temperatures evaluation experimental data
(3) the anti-absorption property of system measures, and test result is as follows:
Table 6 system absorption rear interface tension force experimental data
Above data show, along with the increase of absorption progression, system oil water interfacial tension still can reach 10-3MN/m. System has good anti-adsorptivity.
The principle of the present invention is:
This whipping agent uses α olefin sulfonate that interfacial activity height, resistance to hard water are strong and the tensio-active agent such as the strong zwitterionics of compound synergic effect and Sodium dodecylbenzene sulfonate to carry out the whipping agent system of the composite raising oil displacement efficiency obtained. Utilize the synergistic effect between the various active composition with complementary structure and good compatibleness, steam string stream can be controlled when making the foam system of formation act on steam flood, overcome gravity and onlap, reduce viscous fingering, reduce steam mobility, adjustment steam injection profile, thus improve oil recovery. Simultaneously under kinds of surface promoting agent acts synergistically, reduce oil water interfacial tension, increase substantially displacement efficiency. Therefore, not only can increase substantially sweep efficiency but also there is very strong washing oil ability when this whipping agent is used for foam flooding, supplement producing energy, thus increase substantially oil recovery.
Claims (7)
1. one kind for improving the whipping agent of oil recovery factor, it is characterised in that the weight percent of composition and each component is:
All the other add water to 100%.
2. as claimed in claim 1 for improving the whipping agent of oil recovery factor, it is characterised in that: described zwitterionics be in carboxylic acid trimethyl-glycine, Varion CDG-K, N-amide group carboxylic acid trimethyl-glycine, N-alkylthio carboxylic acid trimethyl-glycine and AMONYL 380LC any one or arbitrarily several with arbitrarily than mixture.
3. as claimed in claim 1 for improving the whipping agent of oil recovery factor, it is characterised in that: described AOS be in C14AOS, C16AOS and C18AOS any one or arbitrarily several with arbitrarily than mixture.
4. as claimed in claim 1 for improving the whipping agent of oil recovery factor, it is characterised in that: described in there is stable foam performance additive be in sorbyl alcohol, Zulkovsky starch, Xylo-Mucine and lauryl alcohol any one or arbitrarily several with arbitrarily than mixture.
5. for improving the purposes of whipping agent for foam flooding of oil recovery factor as described in Claims 1 to 4 any one.
6. as claimed in claim 1 for improving the preparation method of the whipping agent of oil recovery factor, it is characterized in that: by weight percentage Sodium dodecylbenzene sulfonate, AOS, zwitterionics, fatty alcohol-polyoxyethylene ether Disodium sulfosuccinate, the additive with stable foam performance and water are added in the reactor with whipping appts, stirring at room temperature is mixed even, obtains described for improving the whipping agent of oil recovery factor.
7. as claimed in claim 6 for improving the preparation method of the whipping agent of oil recovery factor, it is characterised in that: churning time in the reactor is 1.5～2.5h.
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| CN201511016593.1A CN105670589A (en) | 2015-12-28 | 2015-12-28 | Foamer for enhancing crude oil recovery and preparation method thereof |
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| CN201511016593.1A CN105670589A (en) | 2015-12-28 | 2015-12-28 | Foamer for enhancing crude oil recovery and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111925785A (en) * | 2020-08-19 | 2020-11-13 | 山东新港化工有限公司 | Oil-resistant adsorption-resistant low-tension foam oil displacement agent and preparation method and application thereof |
| CN114854389A (en) * | 2022-07-06 | 2022-08-05 | 德仕能源科技集团股份有限公司 | Foaming agent and preparation method and application thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111925785A (en) * | 2020-08-19 | 2020-11-13 | 山东新港化工有限公司 | Oil-resistant adsorption-resistant low-tension foam oil displacement agent and preparation method and application thereof |
| CN114854389A (en) * | 2022-07-06 | 2022-08-05 | 德仕能源科技集团股份有限公司 | Foaming agent and preparation method and application thereof |
| CN114854389B (en) * | 2022-07-06 | 2022-09-30 | 德仕能源科技集团股份有限公司 | Foaming agent and preparation method and application thereof |
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Application publication date: 20160615 |