CN101684406B - Anti-salt temperature-resistant high-efficient oil-displacing agent applicable to low pressure and low permeability and preparation method thereof - Google Patents
Anti-salt temperature-resistant high-efficient oil-displacing agent applicable to low pressure and low permeability and preparation method thereof Download PDFInfo
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- CN101684406B CN101684406B CN 200910023439 CN200910023439A CN101684406B CN 101684406 B CN101684406 B CN 101684406B CN 200910023439 CN200910023439 CN 200910023439 CN 200910023439 A CN200910023439 A CN 200910023439A CN 101684406 B CN101684406 B CN 101684406B
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Abstract
The invention belongs to the field of tertiary oil recovery chemical oil displacement in petroleum industry, and provides an anti-salt temperature-resistant high-efficient oil-displacing agent applicable to an oil field with low pressure and low permeability and a preparation method thereof. The agent is a mixed system prepared from polyethenoxy ether alkyl naphthalene sulfonate, a non-ionic surface active agent, an osmotic agent, an organic solvent and water. Compared with the prior product, the agent has good salt resistance, ensures that phenomena of precipitation and cloud cannot take place in aqueous solution with salt content of 100,000ppm (wherein the content of calcium and magnesium ions is between 5,000 and 7,000ppm), can effectively reduce the tension force of an oil-water surface to 10<-2>-10<-3>mN/m at higher temperature (90 DEG C). The input-output ratio of the agent can reach over 1: 3.5, so the agent has wide application prospect.
Description
Technical field
The present invention relates to improve the chemical displacement of reservoir oil field of low pressure and low permeability oil recovery rate, specifically a kind of applicable low pressure and low permeability oil field anti-salt temperature-resistant oil-displacing agent and preparation method thereof.
Background technology
Along with the continuous exploitation of oil, it is the high moisture and ultra-high water-containing stage that the land most of oil fields of China have all entered development late stage.According to internationally recognized standard, be during water ratio 97% without benefit and recover the oil.For improving the recovery ratio in oil field, increase workable reserve, domestic each elephant has generally been carried out tertiary oil recovery, in the method for tertiary oil recovery, mainly contains at present following several: (1) polymer flooding; (2) ternary composite driving; (3) caustic waterflooding.Wherein polymer flooding is not suitable with the low pressure and low permeability oil field; Ternary composite driving (alkali-polymkeric substance-tensio-active agent) is owing to wherein contained alkali and polymkeric substance all bring huge injury near the stratum the oil field and oil well etc.
Summary of the invention
The objective of the invention is to overcome prior art to the deficiency of low pressure and low permeability oil field oil displacement efficiency, a kind of high-efficient oil-displacing agent anti-salt temperature-resistant high-efficient oil-displacing agent applicable and preparation method thereof is provided.
Technical scheme of the present invention is as follows:
A kind of low pressure and low permeability oil field high-efficient oil-displacing agent that is applicable to, it is characterized in that: it is formulated according to weight percent by following component:
Soxylat A 25-7 sulfonated alkyl naphathalene 25-30%
Permeate agent 8-15%
Nonionogenic tenside 10-15%
Organic solvent 15-20%
Water 20-42%
Described permeate agent is a kind of in certain herbaceous plants with big flowers base Soxylat A 25-7, pentadecyl Soxylat A 25-7 mixture of or its any proportioning;
Described nonionogenic tenside is a kind of in fatty alcohol-polyoxyethylene ether, glycerine fatty acid fat, sorbitol polyoxyethylene ether mixture of or its any proportioning.
Described organic solvent is the mixture of a kind of or its any proportioning of methyl alcohol, ethanol, ethylene glycol, Virahol.
Applicable low pressure and low permeability oil field anti-salt temperature-resistant oil-displacing agent, it is formulated according to weight percent by following component::
Soxylat A 25-7 sulfonated alkyl naphathalene 25%
Permeate agent 12%
Nonionogenic tenside 15%
Organic solvent 20%
Water 28%
The preparation method of described applicable low pressure and low permeability oil field anti-salt temperature-resistant oil-displacing agent may further comprise the steps:
(1) under the normal temperature and pressure, with 50% of nonionogenic tenside, organic solvent and Total Water, joins in the reactor, fully stir 0.5-1h;
(2) stir after, add permeate agent, stir 0.5-1h;
(3) fully will stir 1-2h in the Soxylat A 25-7 sulfonated alkyl naphathalene adding reactor after the stirring, and then add remaining water and both got the oil-displacing agent product.
The present invention is directed to the reservoir properties in low pressure and low permeability oil field, carried out the active flooding system of compound surface.The Soxylat A 25-7 sulfonated alkyl naphathalene is host in above-mentioned oil-displacing agent component, and other nonionogenic tensides and solvent are auxiliary agent.This oil-displacing agent Heat stability is good is 90 ℃ of nothing precipitations, not muddy; Salt resistance is good; Can effectively reduce oil water interfacial tension to 10
-1-10
-2MN/m.Owing to not containing alkali and polymkeric substance, safer and more effective to the displacement of reservoir oil in low pressure and low permeability oil field among the present invention.This oil-displacing agent need not to add alkali, polymkeric substance, and is high temperature resistant, saline-alkaline tolerance is strong.
Compared with the prior art, the present invention has the following advantages:
(1) oil-displacing agent provided by the invention does not have alkali, thereby the alkali that reduces is conducive to the sustainable exploitation in oil field to the injury on stratum;
(2) the effective active thing content of product reaches 52%;
(3) Heat stability is good of product, not muddy when 90 ℃ of formation temperature, without precipitation;
(4) salt resistance of product is good, can disperse fully in the aqueous solution of salinity 100000ppm, and the solution clarification is bright;
(5) during effective active thing content 0.4-1.0%, can effectively reduce oil water interfacial tension to 10
-2-10
-3MN/m.
Description of drawings
Accompanying drawing is the on-the-spot result of use star of oil-displacing agent of the present invention 23 well production curve synoptic diagram.
Embodiment
Embodiment 1:
(1) under the normal temperature and pressure, get sorbitol polyoxyethylene ether 15kg, Virahol 15kg, water 16kg joins in the reactor, fully stirs 0.5-1h;
(2) stir after, add certain herbaceous plants with big flowers base Soxylat A 25-7 5kg, pentadecyl Soxylat A 25-7 7kg, stir 0.5-1h;
(3) fully will stir 1-2h in the Soxylat A 25-7 sulfonated alkyl naphathalene 25kg adding reactor after the stirring, and then add remaining water and both got oil-displacing agent product of the present invention.
Embodiment 2:
(1) under the normal temperature and pressure, get fatty alcohol-polyoxyethylene ether 5kg, sorbitol polyoxyethylene ether 10kg, ethanol 7kg, Virahol 12kg, water 12kg joins in the reactor, fully stirs 0.5-1h;
(2) stir after, add certain herbaceous plants with big flowers base Soxylat A 25-7 9kg, pentadecyl Soxylat A 25-7 3kg, stir 0.5-1h;
(3) fully will stir 1-2h in the Soxylat A 25-7 sulfonated alkyl naphathalene 30kg adding reactor after the stirring, and then add remaining water and both got oil-displacing agent product of the present invention.
Embodiment 3:
(1) under the normal temperature and pressure, get fatty alcohol-polyoxyethylene ether 15kg, ethanol 18kg, water 16kg joins in the reactor, fully stirs 0.5-1h;
(2) stir after, add pentadecyl Soxylat A 25-7 12kg, stir 0.5-1h;
(3) fully will stir 1-2h in the Soxylat A 25-7 sulfonated alkyl naphathalene 25kg adding reactor after the stirring, and then add remaining water and both got oil-displacing agent product of the present invention.
Embodiment 4:
(1) under the normal temperature and pressure, gets sorbitol polyoxyethylene ether 10kg, glycerine fatty acid fat 5kg, Virahol 15kg, ethylene glycol 5kg, water 13kg and join in the reactor, fully stir 0.5-1h;
(2) stir after, add certain herbaceous plants with big flowers base Soxylat A 25-7 12kg, stir 0.5-1h;
(3) fully will stir 1-2h in the Soxylat A 25-7 sulfonated alkyl naphathalene 28kg adding reactor after the stirring, and then add remaining water and both got oil-displacing agent product of the present invention.
Oil-displacing agent effect assessment of the present invention:
| Emulsifying capacity, g/100g | Interfacial tension (60), mN/m | At stability in hard water |
| ≤0.5 | 3×10 -2-7×10 -3 | 5 grades |
On-the-spot Displacement Efficiency:
Referring to accompanying drawing, can obviously find out this well since moisture decline of in mid-August, 2005 from graphic representation, and drop to 54% by 58% that oil offtake rises, by 5.7m
3/ d rises to 6.3m
3/ d, in mid-October, 2005 is moisture to drop to 48% again, and oil offtake rises to 7.1m
3/ d, present stage oil offtake on average remain on 7.4m
3/ d moisturely is stabilized in 48%, and input-output ratio reaches more than 1: 3.7.
Claims (5)
1. anti-salt temperature-resistant oil-displacing agent that is applicable to the low pressure and low permeability oil field, it is characterized in that: it is formulated according to weight percent by following component:
Described permeate agent is a kind of or its any mixture in certain herbaceous plants with big flowers base Soxylat A 25-7, the pentadecyl Soxylat A 25-7.
2. described a kind of anti-salt temperature-resistant oil-displacing agent that is applicable to the low pressure and low permeability oil field according to claim 1, it is characterized in that: described nonionogenic tenside is a kind of in fatty alcohol-polyoxyethylene ether, glycerine fatty acid fat mixture of or its any proportioning.
3. described a kind of anti-salt temperature-resistant oil-displacing agent that is applicable to the low pressure and low permeability oil field according to claim 1, it is characterized in that: described organic solvent is the mixture of a kind of or its any proportioning of methyl alcohol, ethanol, ethylene glycol, Virahol.
4. a kind of anti-salt temperature-resistant oil-displacing agent that is applicable to the low pressure and low permeability oil field according to claim 1, it is characterized in that: it is formulated according to weight percent by following component:
Described permeate agent is a kind of or its any mixture in certain herbaceous plants with big flowers base Soxylat A 25-7, the pentadecyl Soxylat A 25-7.
5. prepare a kind of method that is applicable to the anti-salt temperature-resistant oil-displacing agent in low pressure and low permeability oil field claimed in claim 1, it is characterized in that: the method may further comprise the steps:
(1) under the normal temperature and pressure, with 50% of nonionogenic tenside, organic solvent and Total Water, joins in the reactor, fully stir 0.5-1h;
(2) stir after, add permeate agent, stir 0.5-1h;
(3) fully will stir 1-2h in the Soxylat A 25-7 sulfonated alkyl naphathalene adding reactor after the stirring, and then add remaining water and both got the oil-displacing agent product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910023439 CN101684406B (en) | 2009-07-28 | 2009-07-28 | Anti-salt temperature-resistant high-efficient oil-displacing agent applicable to low pressure and low permeability and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910023439 CN101684406B (en) | 2009-07-28 | 2009-07-28 | Anti-salt temperature-resistant high-efficient oil-displacing agent applicable to low pressure and low permeability and preparation method thereof |
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| CN101684406A CN101684406A (en) | 2010-03-31 |
| CN101684406B true CN101684406B (en) | 2013-03-06 |
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| CN 200910023439 Expired - Fee Related CN101684406B (en) | 2009-07-28 | 2009-07-28 | Anti-salt temperature-resistant high-efficient oil-displacing agent applicable to low pressure and low permeability and preparation method thereof |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102250606B (en) * | 2010-05-20 | 2013-04-24 | 中国石油化工股份有限公司 | Microemulsion for heavy oil thermal recovery and preparation method for microemulsion |
| CN111088008B (en) * | 2018-10-23 | 2022-10-11 | 中国石油化工股份有限公司 | Surfactant composition for pressure reduction and injection increase of low-permeability oil reservoir and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1511921A (en) * | 2002-12-30 | 2004-07-14 | 中国科学院理化技术研究所 | Use of alkyl naphthalene sulfonate as oil displacement agent |
| WO2008020388A2 (en) * | 2006-08-17 | 2008-02-21 | Schlumberger Canada Limited | Friction reduction fluids |
| CN101284987A (en) * | 2008-05-20 | 2008-10-15 | 陕西海安实业有限责任公司 | High active oil-displacing agent |
| CN101445722A (en) * | 2008-12-30 | 2009-06-03 | 合肥新星油田化学剂有限责任公司 | Oil displacement agent suitable for surfactant for low-permeability oilfield, and preparation method thereof |
-
2009
- 2009-07-28 CN CN 200910023439 patent/CN101684406B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1511921A (en) * | 2002-12-30 | 2004-07-14 | 中国科学院理化技术研究所 | Use of alkyl naphthalene sulfonate as oil displacement agent |
| WO2008020388A2 (en) * | 2006-08-17 | 2008-02-21 | Schlumberger Canada Limited | Friction reduction fluids |
| CN101284987A (en) * | 2008-05-20 | 2008-10-15 | 陕西海安实业有限责任公司 | High active oil-displacing agent |
| CN101445722A (en) * | 2008-12-30 | 2009-06-03 | 合肥新星油田化学剂有限责任公司 | Oil displacement agent suitable for surfactant for low-permeability oilfield, and preparation method thereof |
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| CN101684406A (en) | 2010-03-31 |
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