CN1865392A - Highly effective mixed oil expellant applied to tertiary oil recovery and its preparation method - Google Patents
Highly effective mixed oil expellant applied to tertiary oil recovery and its preparation method Download PDFInfo
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- CN1865392A CN1865392A CNA2006100447720A CN200610044772A CN1865392A CN 1865392 A CN1865392 A CN 1865392A CN A2006100447720 A CNA2006100447720 A CN A2006100447720A CN 200610044772 A CN200610044772 A CN 200610044772A CN 1865392 A CN1865392 A CN 1865392A
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Abstract
The invention discloses a third oil extraction high-efficient built oil displacement agent and preparing method in the chemical oil displacement domain, which is characterized by the following: adapting oil sulfonate as main surface activator to build with non-ion surface activator, anion surface activator, organic solvent and natrium chloratum; reducing oil water interface tension without influencing by mineralizing degree; improving the crude oil recovery efficiency by over 20 percent with polymerization.
Description
Technical field
The present invention relates to improve the chemical displacement of reservoir oil field of oil deposil erude petroleum recovery ratio, specifically a kind of highly efficiency compositional oil-displacing agent that is applied to tertiary oil recovery and preparation method thereof.
Background technology
Along with constantly carrying out of oil production, the oil field of many regions has in the world all entered the high moisture and ultra-high water-containing stage of development late stage.In order to improve the recovery ratio of maturing field, increase workable reserve, mainly there is following flooding method in prior art: (1) caustic waterflooding, (2) polymer flooding, (3) ternary composite driving.Wherein, ternary composite driving (alkali-polymkeric substance-tensio-active agent) grows up on caustic waterflooding and polymer flooding basis, also is the flooding method that is most widely used at present.Though can improve oil recovery factor in a large number, wherein contained a large amount of alkali have all brought huge injury near stratum the oil field and oil well etc.
In order to address the above problem, binary combination flooding becomes the new method of giving priority in tertiary oil recovery field, and it is to utilize the polyacrylamide base polymer to mix the displacement of reservoir oil mode that forms with tensio-active agent.Its key problem is that development is functional, the promoting agent system that stability is strong.At present, single-activity agent on the market mainly is an alkylbenzene sulfonate, products such as sodium lignosulfonate, it is undesirable to reduce the oil water interfacial tension ability, and relatively poor with the compatibleness of local water, and the promoting agent performance of Chu Shouing can not satisfy the requirement of binary combination flooding in the market, therefore need a kind of washing oil ability strong, good stability, the high-efficient oil-displacing agent good, ageing-resistant with the local water compatibleness.
Summary of the invention
Technical assignment of the present invention is at above-mentioned the deficiencies in the prior art, provides a kind of oil displacement efficiency good, and is good with the local water compatibleness, can form less than 5 * 10 with crude oil
-3The highly efficiency compositional oil-displacing agent that is applied to tertiary oil recovery of mN/m ultra low interfacial tension.This oil-displacing agent is applicable to that temperature is not higher than 100 ℃, and salinity is lower than 50000mg/l, and calcium ions and magnesium ions concentration is lower than 2000mg/l, and viscosity of crude is lower than oil reservoir viscosity 200mPa.s, rate of permeation 200 * 10
-3μ m
2～20000 * 10
-3μ m
2Oil reservoir.
Another technical assignment of the present invention is the preparation method who improves this oil-displacing agent.
The highly efficiency compositional oil-displacing agent that is applied to tertiary oil recovery of the present invention, this oil-displacing agent is composed of the following components by weight percentage:
Sulfonated petro-leum 50-70%
Nonionogenic tenside 15-25%
Anion surfactant 5-10%
Organic solvent 2-5%
Sodium-chlor 0.1-3%
Water 5-25%
In above-mentioned oil-displacing agent composition, sulfonated petro-leum is the major surfaces promoting agent, and some kinds of nonionogenic tensides, anion surfactant and sodium-chlor are as the composite formation oil-displacing agent of auxiliary agent process.This oil-displacing agent good stability, it is strong to reduce the oil water interfacial tension ability.
During use, oil-displacing agent and polyacrylamide polymers form the binary displacement oil system.Visco-elasticity with polyacrylamide polymers improves sweep efficiency, reduces the absorption loss of oil-displacing agent on formation rock; Reduction interfacial tension ability and solubilising with oil-displacing agent of the present invention improve displacement efficiency.Both synergies are displaced water filling or irreducible oil that can not extraction, thereby improve the recovery ratio of oil reservoir.
Above-mentioned nonionogenic tenside is one or more the mixture in nonyl phenol polyethylene oxide ether, sorbitol polyoxyethylene ether, glycerol fatty acid ester, the sorbitan fatty acid ester.
Above-mentioned anion surfactant is one or more the mixture in Sodium palmityl sulfate, sodium lauryl sulphate, Sodium dodecylbenzene sulfonate, the sodium stearate.
Described organic solvent is ethanol, ethylene glycol, the mixture of one or more in the Virahol.
The method for preparing highly efficiency compositional oil-displacing agent of the present invention may further comprise the steps:
(1) at normal temperatures and pressures, nonionogenic tenside, organic solvent, anion surfactant are added reactor, fully stirred 1-3 hour;
(2) 50% of Total Water is added reactor, stir after 0.5-2 hour, add remaining 50% water and full dose sodium-chlor, be stirred to evenly, form auxiliary agent;
(3) again sulfonated petro-leum is added reactor, mix with auxiliary agent and promptly get the oil-displacing agent finished product.
The highly efficiency compositional oil-displacing agent that is applied to tertiary oil recovery of the present invention compared with prior art has following outstanding beneficial effect:
(1) form the binary displacement oil system with polymkeric substance is collaborative after, act on the tertiary oil recovery process, need not any alkali and can increase substantially the oil reservoir tar productivity, overcome the huge injury that alkali brings near stratum the oil field and oil well etc. in the alkaline surfactant polymer flooding oil-field process.
(2) related raw material is commercially available industrial chemicals commonly used, is easy to realize that cost is low.
(3) this highly efficiency compositional oil-displacing agent can effectively reduce oil water interfacial tension, and with salinity 20000mg/l, the concentrated water compatibleness of calcium, magnesium ion concentration 1000mg/l is good, and reduction interfacial tension ability is not influenced by salinity.
Embodiment
Further specify the present invention below by concrete preparation embodiment and experimental example.
Preparation embodiment 1:
Raw material:
Sulfonated petro-leum 60kg, nonyl phenol polyethylene oxide ether 14kg, sorbitan fatty acid ester 5kg, sodium lauryl sulphate 7kg, Virahol 3kg, sodium-chlor 1kg, water 10kg.
Preparation process:
(1) at normal temperatures and pressures, nonyl phenol polyethylene oxide ether, sorbitan fatty acid ester, Sodium dodecylbenzene sulfonate are added reactor, fully stirred 2 o'clock;
(2) 5.5kg (Total Water 50%) water is added aforesaid reaction vessel, stirs after 1 hour, add remaining 5.5kg water, and evenly add pure sodium-chlor powder, be stirred to evenly, the formation auxiliary agent;
(3) again sulfonated petro-leum is added reactor, mix with above-mentioned auxiliary agent and promptly get the oil-displacing agent finished product.
Preparation embodiment 2:
Raw material:
Sulfonated petro-leum 65kg, sorbitol polyoxyethylene ether 17.5kg, Sodium dodecylbenzene sulfonate 6kg, ethanol 2.5kg, sodium-chlor 2kg, water 7kg.
Preparation process is identical with the preparation process of preparation embodiment 1.
Preparation embodiment 3:
Raw material:
Sulfonated petro-leum 55kg, glycerol fatty acid ester 8kg, nonyl phenol polyethylene oxide ether 10kg, sodium stearate 8kg, ethylene glycol 3.5kg, sodium-chlor 0.5kg, water 15kg.
Preparation process is identical with the preparation process of preparation embodiment 1.
Preparation embodiment 4
Raw material:
Sulfonated petro-leum 55kg, sorbitan fatty acid ester 15kg, Sodium palmityl sulfate 3kg, sodium lauryl sulphate 5kg, ethanol 3kg, sodium-chlor 2kg, water 17kg.
Preparation process is identical with the preparation process of preparation embodiment 1.
Preparation embodiment 5
Raw material:
Sulfonated petro-leum 60kg, nonyl phenol polyethylene oxide ether 22kg, sodium lauryl sulphate 6kg, Virahol 4kg, sodium-chlor 1kg, water 7kg.
Preparation process is identical with the preparation process of preparation embodiment 1.
Above-mentioned raw materials is all selected industrial raw material for use.
Experimental example one:
Get preparation embodiment 1 to 5 each 0.4g of gained oil-displacing agent, water 5 * 99.5g, respectively with the lonely eastern crude oil of triumph, win the crude oil that sticks together and make the interfacial tension determination experiment.Record interfacial tension and be 1～5 * 10
-3MN/m.Test water is respectively lonely east seven districts water filling (salinity 8207mg/l, calcium, magnesium ion concentration 231mg/l), and crude oil is lonely eastern seven Qu Xi shops 5
4～6
1Layer crude oil; Win the Tuo Er district and inject water (salinity 19318mg/l, calcium, magnesium ion concentration 529mg/l), crude oil is 0-141 well crude oil.
Experimental example two:
In perm-plug method is 1.5 μ m
2Rock core in inject binary and drive slug, it consists of 0.4% oil-displacing agent (preparation embodiment 1 makes)+0.15% polyacrylamide, injects binary in moisture 95% back of water drive and drives slug 0.3PV, can improve recovery ratio 21.3%.Test water is that water is injected in seven districts, lonely east, and crude oil is lonely eastern seven Qu Xi shops 5
4～6
1Layer crude oil.
Experimental example three:
Promoting agent-polymer formulators: 0.6% oil-displacing agent (preparation embodiment 1 makes)+0.17% polyacrylamide is used at lonely east seven district's mining sites, divides three slugs to inject, and begins to inject preposition profile control slug, 0.19% polymkeric substance in September, 2003; Annotate the main body binary since in June, 2004 and drive slug, now obtained the effect of tangible decreasing water cut and increasing oil.Test site water cut decreases to 89.1% has descended 9.1% than the 98.2t/d before taking effect at present.By in March, 2006, the test site has been accumulated and has been increased 3.8 ten thousand tons of oil, improves recovery ratio 1.4%, have 10 mouthfuls of recovery wells in various degree see the decreasing water cut and increasing oil effect.Binary combination flooding pilot test district is positioned at the lonely east western Ng5 in seven districts
4-6
1The layer southeast, 0.94 square kilometre of oil-bearing area, 277.5 ten thousand tons of geologic reserve, have three oil-containing substratums, reservoir temperature is 68 ℃, 26 mouthfuls of test site design well locations, wherein, 16 mouthfuls of recovery wells, injection Jing10Kou, observation Jing3Kou, comprehensive water cut 98.2% before the test, test site recovery percent of reserves 34.4%.
Can get through a large amount of experiments, utilize oil-displacing agent of the present invention and polyacrylamide polymers to carry out binary combination flooding after the water drive and improve recovery ratio greater than 20%, polyacrylamide polymers is driven the back binary combination flooding and is improved recovery ratio greater than 10%.
Claims (5)
1, be applied to the highly efficiency compositional oil-displacing agent of tertiary oil recovery, this oil-displacing agent is composed of the following components by weight percentage:
Sulfonated petro-leum 50-70%
Nonionogenic tenside 15-25%
Anion surfactant 5-10%
Organic solvent 2-5%
Sodium-chlor 0.1-3%
Water 5-25%
2, highly efficiency compositional oil-displacing agent according to claim 1 is characterized in that described nonionogenic tenside is one or more the mixture in nonyl phenol polyethylene oxide ether, sorbitol polyoxyethylene ether, glycerol fatty acid ester, the sorbitan fatty acid ester.
3, highly efficiency compositional oil-displacing agent according to claim 1 is characterized in that described anion surfactant is one or more the mixture in Sodium palmityl sulfate, sodium lauryl sulphate, Sodium dodecylbenzene sulfonate, the sodium stearate.
4, highly efficiency compositional oil-displacing agent according to claim 1 is characterized in that described organic solvent is ethanol, ethylene glycol, the mixture of one or more in the Virahol.
5, the method for preparing the described highly efficiency compositional oil-displacing agent of claim 1 is characterized in that this method may further comprise the steps:
(1) at normal temperatures and pressures, nonionogenic tenside, organic solvent, anion surfactant are added reactor, fully stirred 1-3 hour;
(2) 50% of Total Water is added reactor, stir after 0.5-2 hour, add remaining 50% water and full dose sodium-chlor, be stirred to evenly, form auxiliary agent;
(3) again sulfonated petro-leum is added reactor, mix with auxiliary agent and promptly get the oil-displacing agent finished product.
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| CNB2006100447720A CN100489054C (en) | 2006-06-15 | 2006-06-15 | Highly effective mixed oil expellant applied to tertiary oil recovery and its preparation method |
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|---|---|---|---|
| CNB2006100447720A CN100489054C (en) | 2006-06-15 | 2006-06-15 | Highly effective mixed oil expellant applied to tertiary oil recovery and its preparation method |
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| CN100489054C CN100489054C (en) | 2009-05-20 |
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| CN102277149A (en) * | 2010-06-11 | 2011-12-14 | 中国石油天然气股份有限公司 | Low-permeability oil field surfactant oil displacement agent |
| CN102504792A (en) * | 2011-11-10 | 2012-06-20 | 西南石油大学 | Displacement agent for ultrahigh-temperature, high-salt, high-calcium, high-magnesium and homogeneous oil reservoirs |
| CN102766448A (en) * | 2012-07-12 | 2012-11-07 | 天津市瑞德赛恩新材料开发有限公司 | Foam flooding agent |
| CN101705083B (en) * | 2009-11-16 | 2013-01-02 | 山东德仕化工集团有限公司 | Formulation of surfactant oil displacement system for anionic and nonionic oil displacement |
| CN102051164B (en) * | 2009-10-30 | 2013-05-01 | 中国石油化工股份有限公司 | Surfactant for oil field and preparation method of surfactant |
| CN103410486A (en) * | 2013-08-06 | 2013-11-27 | 西安石油大学 | Three-in-one composite profile control and displacement process used for oilfield deep profile control |
| CN103429696A (en) * | 2010-12-29 | 2013-12-04 | 国际壳牌研究有限公司 | Method and composition for enhanced hydrocarbons recovery from a formation containing a crude oil |
| CN103820094A (en) * | 2013-12-04 | 2014-05-28 | 克拉玛依市正诚有限公司 | Mixed type surface active agent and preparation method thereof |
| CN104232048A (en) * | 2014-08-26 | 2014-12-24 | 山东聚鑫化工有限公司 | Compound type oil-displacing agent |
| CN104962274A (en) * | 2015-06-17 | 2015-10-07 | 成都高普石油工程技术有限公司 | Composite surfactant for oil exploitation |
| CN105331348A (en) * | 2015-12-04 | 2016-02-17 | 西安石油大学 | Homogeneous-phase microemulsion oil-displacing agent applied to low-permeation oil field and preparation method of homogeneous-phase microemulsion oil-displacing agent |
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| CN107365574A (en) * | 2017-06-15 | 2017-11-21 | 中国石油化工股份有限公司 | A kind of viscosity reduction oil displacement agent for common heavy oil reservoir and preparation method thereof |
| CN109536237A (en) * | 2019-01-08 | 2019-03-29 | 濮阳市万良石油科技发展有限公司 | A kind of synergist and preparation method thereof |
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| CN111154471A (en) * | 2018-11-07 | 2020-05-15 | 中国石油天然气股份有限公司 | Composite oil displacement agent containing sodium chloride and preparation method thereof |
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| CN102051164B (en) * | 2009-10-30 | 2013-05-01 | 中国石油化工股份有限公司 | Surfactant for oil field and preparation method of surfactant |
| CN101705083B (en) * | 2009-11-16 | 2013-01-02 | 山东德仕化工集团有限公司 | Formulation of surfactant oil displacement system for anionic and nonionic oil displacement |
| CN102277149A (en) * | 2010-06-11 | 2011-12-14 | 中国石油天然气股份有限公司 | Low-permeability oil field surfactant oil displacement agent |
| CN102277149B (en) * | 2010-06-11 | 2013-12-04 | 中国石油天然气股份有限公司 | Low-permeability oil field surfactant oil displacement agent |
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| CN103410486B (en) * | 2013-08-06 | 2015-10-28 | 西安石油大学 | A kind of three-in-one compound displacement technique for oil field deep transfer drive |
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| CN107365574B (en) * | 2017-06-15 | 2020-04-17 | 中国石油化工股份有限公司 | Viscosity-reducing oil displacement agent for common heavy oil reservoir and preparation method thereof |
| CN111154471A (en) * | 2018-11-07 | 2020-05-15 | 中国石油天然气股份有限公司 | Composite oil displacement agent containing sodium chloride and preparation method thereof |
| CN111154472A (en) * | 2018-11-07 | 2020-05-15 | 中国石油天然气股份有限公司 | Ternary composite oil displacement agent and preparation method thereof |
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