CN103160266A - Viscosity-reduction, profile-control and oil-displacement oil well additive, oil well combination treating agent and application thereof - Google Patents
Viscosity-reduction, profile-control and oil-displacement oil well additive, oil well combination treating agent and application thereof Download PDFInfo
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- CN103160266A CN103160266A CN2013100653709A CN201310065370A CN103160266A CN 103160266 A CN103160266 A CN 103160266A CN 2013100653709 A CN2013100653709 A CN 2013100653709A CN 201310065370 A CN201310065370 A CN 201310065370A CN 103160266 A CN103160266 A CN 103160266A
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Abstract
The invention relates to viscosity-reduction, profile-control and oil-displacement oil well additive, oil well combination treating agent and application of the viscosity-reduction, profile-control and oil-displacement oil well additive and the oil well combination treating agent. The oil well additive comprises the following components by weight: 1-15% of OBS, 10-50% of alcohol, 1-2% of ammonium chloride, 1-2% of sodium nitrite, with the balance being water. The oil well combination treating agent comprises the oil well additive prepared with the stated components. The oil well combination treating agent further comprises, by weight, 5-10% of nonylphenol polyoxyethylene ether (NPE) and/or 10-15% of sodium alcohol ether sulphate (AES), with the balance being water. The additive and the oil well combination treating agent can effectively reduce the interfacial tension, are strong in foaming capability, and can achieve the purposes of viscosity reduction, profile control and oil displacement.
Description
Technical field
The invention relates to oil well auxiliary agent and oil well combined treatment and the application thereof of a kind of viscosity reduction, profile control, the displacement of reservoir oil.
Background technology
The oil field is more for the method for steam-stimulated well viscosity reduction, profile control, the displacement of reservoir oil.But due to the impact of High Temperature High Pressure, viscosity-depression agent, amendment, the selectable kind of oil-displacing agent are limited.Utilizing limited resources how to obtain to have done for many years a lot of trials aspect greatest benefit.
" the many rounds of heavy crude reservoir handle up later stage improve the development effectiveness technical study " China University Of Petroleum Beijing's Ph D dissertation in 2007, Li Jinfa." research and the application of novel foam transfer drive system in thermal recovery well " China University Of Petroleum Beijing's Master's thesis in 2011, Zhang Yong.Doing a large amount of experiments aspect viscosity reduction, profile control, the displacement of reservoir oil, but its selected formula there is certain limitation, and construction technology is not done concrete elaboration.
Domestic patent and paper lay particular emphasis on the synthetic and theoretical investigation of product more, and how the product that real high temperature resistance is 300 ℃ seldom utilizes limited resources to carry out reasonable combination, realizes the purpose of viscosity reduction, profile adjustment and oil displacement, is emphasis of the present invention.
Domestic popular constructional method and chemical agent combination does not at present have dependency with the present invention.
Summary of the invention
One object of the present invention is to provide the oil well auxiliary agent of a kind of viscosity reduction, profile control, the displacement of reservoir oil.
Another object of the present invention is to provide the oil well combined treatment of described oil well auxiliary agent preparation.
A further object of the present invention is to provide the method that described oil well auxiliary agent is processed oil well of using.
Another purpose of the present invention is to provide the method that described oil well combined treatment is processed oil well of using.
Another purpose of the present invention is to provide described oil well auxiliary agent and the application of oil well combined treatment in oil well viscosity reduction, profile control, the displacement of reservoir oil are processed.
For reaching above-mentioned purpose, at first the present invention provides the oil well auxiliary agent of a kind of viscosity reduction, profile control, the displacement of reservoir oil, described oil well auxiliary agent comprises following weight percent composition: perfluorinated nonene oxygen base benzene sulfonic acid sodium salt 1～15%, alcohol 10～50%, ammonium chloride 1～2% and Sodium Nitrite 1～2%, surplus is water.Wherein said per-cent is take perfluorinated nonene oxygen base benzene sulfonic acid sodium salt, alcohol, ammonium chloride, Sodium Nitrite and water gross weight as 100%.
Wherein perfluorinated nonene oxygen base benzene sulfonic acid sodium salt is the host of displacement of reservoir oil foaming, and alcohol is for host and water can be dissolved each other, and ammonium chloride and Sodium Nitrite at high temperature can react the generation non-condensable gas, are conducive to the formation of foam.
According to oil well auxiliary agent of the present invention, wherein said alcohol can select the alcohol of this area routine to prepare oil well auxiliary agent of the present invention, and the present invention is in order better to coordinate with other compositions of auxiliary agent, wherein preferred adopt be: one or more combinations in methyl alcohol, ethanol and Virahol.
In order further to improve the result of use of oil well auxiliary agent of the present invention, the present invention further provides a kind of oil well combined treatment, after the present invention is mixed with the auxiliary agent of described oil well combined treatment with perfluorinated nonene oxygen base benzene sulfonic acid sodium salt, alcohol, ammonium chloride, Sodium Nitrite and water, the composition of separately getting following weight percent is mixed with the assistant agent of described oil well combined treatment: polyoxyethylene nonylphenol ether 5～10% and/or polyoxyethylenated alcohol sodium sulfate 10～15%, surplus are water.
Wherein the per-cent of assistant agent is with the whole compositions of assistant agent, i.e. polyoxyethylene nonylphenol ether and/or polyoxyethylenated alcohol sodium sulfate, and the gross weight of water is 100%.
Polyoxyethylene nonylphenol ether of the present invention and/or polyoxyethylenated alcohol sodium sulfate should be understood to, assistant agent can union base phenol polyethenoxy ether, polyoxyethylenated alcohol sodium sulfate and water form, its weight ratio is polyoxyethylene nonylphenol ether 5～10%, polyoxyethylenated alcohol sodium sulfate 10～15%, and surplus is water;
Be perhaps, assistant agent also can union base phenol polyethenoxy ether and water form, its weight ratio is polyoxyethylene nonylphenol ether 5～10%, surplus is water;
Again or be, assistant agent also can be comprised of polyoxyethylenated alcohol sodium sulfate and water, and its weight ratio is polyoxyethylenated alcohol sodium sulfate 10～15%, and surplus is water;
Wherein the effect of assistant agent is mainly viscosity reduction, profile control, the displacement of reservoir oil but high temperature resistance not, and auxiliary agent can at high temperature generate non-condensable gas, reduce interfacial tension, isolation assistant agent and high-temperature steam, plays equally viscosity reduction, profile control, the displacement of reservoir oil.
Auxiliary agent of the present invention and assistant agent are independent preparation and independent packaging separately, but not will both mix.
According to oil well combined treatment of the present invention, wherein auxiliary agent and assistant agent weight ratio can freely be selected according to construction condition, and the present invention is preferably 1: 1-5 in order further to strengthen construction effect; It is for example 1: 2.
According to oil well combined treatment of the present invention, wherein said polyoxyethylene nonylphenol ether is this area common agents, those skilled in the art know the concrete polyoxyethylene nonylphenol ether that is applicable to the oil well auxiliary agent, the commercially available polyoxyethylene nonylphenol ether that meets the correlated quality standard all can be used for the preparation of oil well auxiliary agent of the present invention, such as the NP10 of technical grade～15.
According to oil well combined treatment of the present invention, wherein said polyoxyethylenated alcohol sodium sulfate is this area common agents, those skilled in the art know the concrete polyoxyethylenated alcohol sodium sulfate that is applicable to the oil well auxiliary agent, for example (,) the present invention can preferably adopt be: RO (CH
2CH
2O) n-SO
3Na, wherein n=2 or 3, R are the alkyl of carbonatoms 12～15.The present invention adopts conventional commercially available polyoxyethylenated alcohol sodium sulfate namely can be applicable to the present invention and realize the object of the invention.
Next the invention provides the method that described oil well auxiliary agent is processed oil well, and described method comprises the steps:
Described auxiliary agent is clamp-oned the stratum before steam treatment or with the steam drop.Again, the present invention also provides described oil well combined treatment to process the method for oil well, and described method comprises the steps, first assistant agent is clamp-oned the stratum before steam, then auxiliary agent is clamp-oned the stratum before steam or with the steam drop.
The present invention is divided into auxiliary agent and two independent sectors of assistant agent with described oil well combined treatment, utilize auxiliary agent that assistant agent and high-temperature steam are separated, the assistant agent that high temperature resistant property is relatively poor is clamp-oned oil reservoir in advance, isolate and replace with the auxiliary agent of high temperature resistance, realizing viscosity reduction, profile control, displacement of reservoir oil integrated construction under high temperature and high pressure environment.Because of assistant agent high temperature resistance not, though and auxiliary agent high temperature resistance, but expensive, under the isolation and replacement of auxiliary agent, the envrionment temperature of assistant agent is less than 140 ℃, with realize spontaneous non-condensable gas, viscosity reduction, profile control, displacement of reservoir oil integrated construction after auxiliary agent mixes, reach the purpose of spontaneous non-condensable gas, viscosity reduction, profile control, the displacement of reservoir oil.
The present invention can also further preferably first clamp-on assistant agent the stratum, then auxiliary agent is divided into two portions in order further to improve construction effect before steam treatment, a part is clamp-oned the stratum before steam treatment, and another part is clamp-oned the stratum with the steam drop; Clamp-on the auxiliary agent on stratum and be 1: 1～5 with the auxiliary dosage ratio that the steam drop is clamp-oned the stratum before steam treatment.
The present invention is divided into two portions with auxiliary agent and clamp-ons, and the part of at first clamp-oning is for assistant agent and steam being kept apart, avoiding assistant agent to contact rear the inefficacy with steam; The part of clamp-oning with the steam drop can be better and vapor mixing, improves construction effect.
Wherein process during the method for oil well and described oil well combined treatment process the method for oil well at described oil well auxiliary agent, described operation of clamp-oning in the time of can processing oil wells with reference to other auxiliary agents of prior art, the present invention is preferred above-mentioned, and that clamp-on employing is 0.5～2m
3/ h.
Wherein process during the method for oil well and described oil well combined treatment process the method for oil well at described oil well auxiliary agent, the consumption when auxiliary dosage also can be processed oil wells with reference to other auxiliary agents of prior art, and rationally adjust according to site operation, such as 1～4m
3/ m.
The present invention also provides the application of described oil well auxiliary agent in oil well viscosity reduction, profile control, the displacement of reservoir oil are processed.
The present invention provides again the application of described oil well combined treatment in oil well viscosity reduction, profile control, the displacement of reservoir oil are processed.
Wherein preferred oil well noted earlier is thickened oil steam-stimulated well.
Described thickened oil steam-stimulated well is this area common terminology, by those skilled in the art are known usually.
In sum, the invention provides a kind of well-treating method.Well-treating method of the present invention has following advantage:
(1) realize high temperature resistance and the not combination of high temperature resistance chemical agent by rational working procedure;
(2) will dissolve each other by intermediate (alcohol) and water for the high temperature resistance solid blowing agent of other field (as flash arrestor), realize pumping into;
(3) mixture effectively reduces interfacial tension, and foaming power is strong, reaches the purpose of viscosity reduction, profile control and/or the displacement of reservoir oil.
(4) add the chemical agent that can automatically generate non-condensable gas, make steam and non-condensable gas synergy, improve swept volume.
Embodiment
Below describe the beneficial effect of implementation process of the present invention and generation in detail by specific embodiment, be intended to help the reader to understand better essence of the present invention and characteristics, but not as the restriction to this case practical range.
Embodiment 1
Certain heavy oil wells, 25 meters of core intersections, 5 layers.Viscosity of crude 7520mPa.s, because repeatedly handling up, effect is by the round variation.
During construction, first clamp-on assistant agent: 60 tons of the mixed solutions of commercially available NP-15 (polyoxyethylene nonylphenol ether) 10%wt% and commercially available AES (polyoxyethylenated alcohol sodium sulfate) 15%wt%, the auxiliary agent of 10 tons of 10%wt% of intermediate isolating (commercially available OBS (perfluorinated nonene oxygen base benzene sulfonic acid sodium salt) 5%wt%, alcohol (methyl alcohol) 50%wt%, ammonium chloride 1-2%, Sodium Nitrite 1-2%, all the other are water), then clamp-on 10 tons of auxiliary agents with steam by the steam injection drop, steam consumption 3000 sides.Stewing well 3 days.After driving a well, the contrast same period increases day by day oily 5 tons, liquid 18 sides that increase day by day, positive effect.
Auxiliary agent to the present embodiment detects:
(1) adopt the air-flow method to measure, the half foam life period under 55 ℃ and normal pressure is 2470s, and the half foam life period under 120 ℃ and 1.4MPa pressure is 1904s;
(2) with 45 blocks of viscous crude of brocade, adopt in the time of 60 ℃ and revolve the method for dripping mensuration oil/water termination tension force, get interfacial tension=3.09 * 10
-4MNm
-1
(3) 50 ℃ and water oil ratio be 7: 3 o'clock be 98% to 45 reducing thick oil viscosity rates of brocade.
Embodiment 2
Certain heavy oil wells, core intersection 10.5. rice, 3 layers.Viscosity of crude 6570mPa.s has handled up and 14 has taken turns, and because repeatedly handling up, effect is by the round variation.
During construction, with described auxiliary formula (commercially available perfluorinated nonene oxygen base benzene sulfonic acid sodium salt 1%; Alcohol (ethanol) 10%; Ammonium chloride 1%; Sodium Nitrite 1-2%; Surplus is water, and described per-cent is weight percentage) 30 tons, clamp-on the stratum with the high temperature high voltage resistant drip pump with steam 2000 sides.Stewing well 5 days.After driving a well, the contrast same period increases day by day oily 2 tons, liquid 9 sides that increase day by day, positive effect.
Auxiliary agent to the present embodiment detects:
(1) adopt the air-flow method to measure, the half foam life period under 55 ℃ and normal pressure is 2560s, and the half foam life period under 120 ℃ and 1.4MPa pressure is 2108s;
(2) with 45 blocks of viscous crude of brocade, adopt in the time of 60 ℃ and revolve the method for dripping mensuration oil/water termination tension force, get interfacial tension=2.07 * 10
-4MNm
-1
(3) 50 ℃ and water oil ratio be 7: 3 o'clock be 95% to 45 reducing thick oil viscosity rates of brocade.
Embodiment 3
Certain heavy oil wells, core intersection 15.5. rice, 4 layers.Viscosity of crude 4270mPa.s has handled up and 12 has taken turns, and because repeatedly handling up, effect is by the round variation.
During construction, first clamp-on the commercially available NP-15 of assistant agent (polyoxyethylene nonylphenol ether) 5%wt% and commercially available AES (polyoxyethylenated alcohol sodium sulfate)) 60 tons of the mixed solutions of 10%wt%, then clamp-on 15 tons of auxiliary agents (commercially available OBS (perfluorinated nonene oxygen base benzene sulfonic acid sodium salt)) 5%wt%, alcohol (Virahol) 50%wt%, ammonium chloride 2wt%, Sodium Nitrite 2wt%, all the other are water), steam treatment 2500 sides then.Stewing well 3 days.After driving a well, the contrast same period increases day by day oily 4 tons, liquid 15 sides that increase day by day, positive effect.
Carry out the different ingredients combination construction at heavy oil block at present and amount to 27 wells, accumulative total increases 4560 tons of oil.
Auxiliary agent to the present embodiment detects:
(1) adopt the air-flow method to measure, the half foam life period under 55 ℃ and normal pressure is 2510s, and the half foam life period under 120 ℃ and 1.4MPa pressure is 1950s;
(2) with 45 blocks of viscous crude of brocade, adopt in the time of 60 ℃ and revolve the method for dripping mensuration oil/water termination tension force, get interfacial tension=3.24 * 10
-4MNm
-1
(3) 50 ℃ and water oil ratio be 7: 3 o'clock be 96% to 45 reducing thick oil viscosity rates of brocade.
Claims (9)
1. the oil well auxiliary agent of a viscosity reduction, profile control, the displacement of reservoir oil, it is characterized in that, described oil well auxiliary agent comprises following weight percent composition: perfluorinated nonene oxygen base benzene sulfonic acid sodium salt 1～15%, alcohol 10～50%, ammonium chloride 1～2% and Sodium Nitrite 1～2%, surplus is water.
2. oil well auxiliary agent according to claim 1, is characterized in that, described alcohol is one or more combinations in methyl alcohol, ethanol and Virahol.
3. oil well combined treatment, it is characterized in that, described oil well combined treatment comprises the auxiliary agent of the described one-tenth assignment system of claim 1, described oil well combined treatment also comprises the assistant agent that the composition of following weight percent is mixed with: polyoxyethylene nonylphenol ether 5～10% and/or polyoxyethylenated alcohol sodium sulfate 10～15%, surplus are water.
4. oil well combined treatment according to claim 3, is characterized in that, described auxiliary agent and assistant agent weight ratio are 1: 1～5.
5. application rights requires 1 or 2 described oil well auxiliary agents to process the method for oil well, it is characterized in that, described method comprises the steps: described auxiliary agent is clamp-oned the stratum before steam treatment or with the steam drop.
6. application rights requires 3 or 4 described oil well combined treatment to process the method for oil well, it is characterized in that, described method comprises the steps: first assistant agent to be clamp-oned the stratum before steam treatment, then auxiliary agent is clamp-oned the stratum before steam treatment or with the steam drop.
7. application rights requires 3 or 4 described oil well combined treatment to process the method for oil well, it is characterized in that, first assistant agent is clamp-oned the stratum before steam treatment, then auxiliary agent is divided into two portions, a part is clamp-oned the stratum before steam treatment, another part is clamp-oned the stratum with the steam drop; Clamp-on the auxiliary agent on stratum and be 1: 1～5 with the auxiliary dosage ratio that the steam drop is clamp-oned the stratum before steam treatment.
8. the described oil well auxiliary agent of claim 1 or 2 and the described oil well combined treatment of claim 3 or 4 application in oil well viscosity reduction, profile control, the displacement of reservoir oil are processed.
9. application according to claim 8, is characterized in that, described oil well is thickened oil steam-stimulated well.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103589410A (en) * | 2013-10-22 | 2014-02-19 | 中国石油天然气股份有限公司 | Chemical assistant for temporary blocking treatment and energy increment of thickened oil steam huff-puff well as well as preparation method and application of chemical assistant |
| CN105507862A (en) * | 2015-12-04 | 2016-04-20 | 中国石油天然气股份有限公司 | Injecting method of underground modifying and viscosity-reducing nano catalyst for thickened oil |
| CN110467910A (en) * | 2018-05-11 | 2019-11-19 | 中国石油化工股份有限公司 | Oil displacement agent composition and preparation method thereof and reducing thick oil viscosity are handled up recovery method |
| US11236580B2 (en) | 2019-09-04 | 2022-02-01 | Saudi Arabian Oil Company | Methods for improving oil recovery within a subterranean formation |
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| CN101323780A (en) * | 2008-08-06 | 2008-12-17 | 西安石油大学 | Low pervasion oilfield thermochemical cleanup additive and use thereof |
| CN102127414A (en) * | 2010-12-28 | 2011-07-20 | 中国石油大学(华东) | Microemulsion-type fracture acidizing cleanup additive, and preparation method and application thereof |
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2013
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Patent Citations (2)
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| CN101323780A (en) * | 2008-08-06 | 2008-12-17 | 西安石油大学 | Low pervasion oilfield thermochemical cleanup additive and use thereof |
| CN102127414A (en) * | 2010-12-28 | 2011-07-20 | 中国石油大学(华东) | Microemulsion-type fracture acidizing cleanup additive, and preparation method and application thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103589410A (en) * | 2013-10-22 | 2014-02-19 | 中国石油天然气股份有限公司 | Chemical assistant for temporary blocking treatment and energy increment of thickened oil steam huff-puff well as well as preparation method and application of chemical assistant |
| CN103589410B (en) * | 2013-10-22 | 2016-05-11 | 中国石油天然气股份有限公司 | Thickened oil steam-stimulated well stifled energization is used temporarily chemical assistant and compound method and application |
| CN105507862A (en) * | 2015-12-04 | 2016-04-20 | 中国石油天然气股份有限公司 | Injecting method of underground modifying and viscosity-reducing nano catalyst for thickened oil |
| CN105507862B (en) * | 2015-12-04 | 2018-06-01 | 中国石油天然气股份有限公司 | A kind of method for implanting of the glutinous nanocatalyst of viscous crude underground modification drop |
| CN110467910A (en) * | 2018-05-11 | 2019-11-19 | 中国石油化工股份有限公司 | Oil displacement agent composition and preparation method thereof and reducing thick oil viscosity are handled up recovery method |
| CN110467910B (en) * | 2018-05-11 | 2021-08-06 | 中国石油化工股份有限公司 | Oil displacement agent composition, preparation method thereof and viscosity-reducing huff and puff mining method of thick oil |
| US11236580B2 (en) | 2019-09-04 | 2022-02-01 | Saudi Arabian Oil Company | Methods for improving oil recovery within a subterranean formation |
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