CN102020982A - Multiple-effect viscosity depressant for exploiting thickened oil - Google Patents
Multiple-effect viscosity depressant for exploiting thickened oil Download PDFInfo
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Abstract
The invention relates to a multiple-effect viscosity depressant for exploiting thickened oil. The multiple-effect viscosity depressant is prepared from the following raw materials in percentage by weight: 5-15 percent of hexose salt, 5-15 percent of polyacrylic ester, 5-15 percent of N-sodium lauroyl sarcosine, 10-30 percent of petroleum ether or mixed benzene and the balance of water. The product of the invention is a white emulsion at room temperature under normal pressure, has stable performance and can be stored for a long time. Before use, the product is diluted 20-30 times and added to an oil well to achieve the aim of reducing viscosity and increasing the yield of the thickened oil.
Description
Technical field: the present invention is a kind of oilfield chemistry dedicated set compound, is a kind of multiple-effect well treatment agent that is fit to the viscous oil recovery volume increase, belongs to oilfield chemistry specialty chemicals production field.
Background technology:
Viscous crude is because the gum asphaltic content height causes its viscosity very big, super viscosity of thickened oil can reach more than the 50000mPas (50 ℃), because colloid, asphaltene molecules amount are big, and contain considerable active gene, can form various Intermolecular Forcess each other, coalesce together, micromolecular hydro carbons etc. are wrapped wherein, thereby make viscosity of thickened oil very big.The viscous oil recovery difficulty is very big, in order to improve the output of viscous crude, reduces cost of winning, improves recovery ratio, mainly from reducing the angle of viscosity of thickened oil.
The exploitation of present domestic most viscous crude all is to adopt steam stimulation method (thermal methods a kind of), steam stimulation is to point to the steam that a bite recovery well injects some amount in a short time continuously, then closing well (stewing well) a couple of days, heat is spread, afterwards opening well and making production again.After instantaneous petroleum production is reduced to certain level, carry out the notes vapour of next round, stewing well, oil recovery, so repeatedly, loop cycle, until oil well production increasing oil mass economy invalid or change other mining types into till.But its recovery ratio is low, and after too much alternate water injection vapour, gas oil ratio descends, and production cost increases.
Thermal recovery also can make crude oil property change, be easy to mobile relatively and go out to the greatest extent than the lightweight part, what stay increases than heavy part (comprising bituminous matter, colloid) proportion again, and they adhere to pore channel and play ponding, on this external heavy oil wells, because of in the operation process of adopting various measures, the cold damage that causes also makes viscous crude become thicker and the obstruction oil flow channel, cause oil reservoir few fuel-displaced or not fuel-displaced, or annotate not admission, or steam injection pressure is raise, be difficult to performance and annotate vapour efficient.
At present, the research direction that improves the viscous oil recovery recovery ratio mainly contains two aspects, and the one, improve existing thermal recovery technology, improve and annotate vapour efficient.This scheme at each elephant all in exploratory development, but on the whole, little for the increase rate of recovery ratio.The 2nd, under existing thermal recovery technology, research oil recovery auxiliary agent, the oil field chemical of reduction viscosity of thickened oil in the particularly viscous oil recovery process.The development potentiality of this measure is bigger, and obvious especially for the increase rate of recovery ratio.
In order to reduce the viscosity of viscous crude, increase flowability, improve output, generally adopt thermal methods, dilution method, reducing viscosity by emulsifying methods etc. reduce viscosity of thickened oil.
Thermal methods is the main method of present viscous oil recovery, but its recovery ratio is low, and after too much alternate water injection vapour, gas oil ratio descends, and production cost increases.
Dilution method is to point to inject the thin oil dissolving in the oil reservoir, disperses part bituminous matter, colloid, reach the purpose of viscosity reduction, but this method production cost is too high, can't adopt on a large scale.
The reducing viscosity by emulsifying method makes certain density water phase surfactant mixture exactly, at a certain temperature with the thick oil underground well thorough mixing, making highly viscous crude is to be scattered in the active water with thick oil droplet, form low viscous oil-in-water (O/W) type emulsion, this milk sap has reduced the resistance of motion of crude oil in pit shaft and pipeline, after adding hydrophilic surfactant in the crude oil, the hydrophilic group surfactivity is very strong, and substitute the hydrophobic natural emulsifying agent on the water-oil interface and form directed adsorption layer, adsorption layer will change molecular interaction and surperficial transmittance process consumingly, cause viscosity of crude to descend, it is simple that the reducing viscosity by emulsifying technology has method, economical, advantages such as required little energy.But existing most of emulsifying pour depressors of development at present exist also that 1. watering quantity is big; 2. emulsion's stability is difficult to control; 3. etching problem; 4. subsequent disposal difficulty; 5. problem such as biochemical degradation poor performance.
Summary of the invention:
The objective of the invention is to seek a kind of multiple-effect viscosity-depression agent, overcome the deficiency of prior art, improve heavy oil production, this viscous oil recovery multiple-effect viscosity-depression agent is characterized in that raw materials used and mass percent is:
Above-mentioned hexose hydrochlorate is ferrous gluconate, Zinc Gluconate, levulinic acid iron, levulinic acid zinc.
Above-mentioned polyacrylic ester is that molecular weight is the ethyl propenoate of 5-30 ten thousand and the segmented copolymer of butyl acrylate.
Above each component is fully mixed at normal temperatures and pressures, promptly get the white emulsion product.These product performance are stable, are fit to standing storage.Dilute with water 20-30 doubly gets final product in use.
Compared with the prior art, the present invention has following advantage:
1) viscous oil recovery recovery ratio improves obviously: show that through the oil field field test carrying out the pretreated oil displacement efficiency of oil reservoir with the present invention before cyclic steam stimulation improves 13%～15% than simple steam stimulation, can greatly improve mother oil displacement, input-output ratio is more than 1: 20.
2) viscosity-depression agent of the present invention is high temperature resistant.During up to 300 ℃, still performance does not subtract in temperature.
3) viscosity-depression agent saline-alkaline tolerance of the present invention is strong.Water salinity almost has no effect to this viscous oil recovery multiple-effect volume increase agent use properties.
4) viscosity-depression agent viscosity break ratio height of the present invention.Viscosity break ratio of the present invention can reach 98% 30 ℃ of-70 ℃ of scopes.
5) add sherwood oil or mixed benzene among the present invention, can carry out de-plugging, produce unique effect the oil well that is subjected to cold damage bituminous matter, colloid to stop up oil flow channel with de-plugging effect.Have effects such as viscous crude de-plugging and viscosity reduction simultaneously.
6) application extraction crude oil emulsion stability of the present invention is moderate, and subsequent disposal is easy, does not increase crude oil aftertreatment pressure.
7) raw material that the present invention adopts is the material of bio-degradable, and a large amount of the use can not pollute environment yet.
8) wide spectrum adaptability of the present invention is strong, is fit to the butyrous exploitation of multiple viscous crude.
Embodiment
1, be ferrous gluconate 8% according to mass ratio, the block polymer 5% of ethyl propenoate and butyl acrylate, N-sodium lauroyl sareosine 10%, sherwood oil 25%, water 52%.Should mix stirring by several raw materials, promptly obtain viscous oil recovery multiple-effect viscosity-depression agent.Adopt Karamay oilfield to do the reducing thick oil viscosity test, viscosity break ratio reaches 98%
2, be ferrous gluconate 10% according to mass ratio, the block polymer 10% of ethyl propenoate, butyl acrylate and N-sodium lauroyl sareosine 15% mix benzene 30%, water 35%.Should mix stirring by several raw materials, promptly obtain viscous oil recovery multiple-effect viscosity-depression agent.Do the reducing thick oil viscosity test by Karamay oilfield, viscosity break ratio reaches 98%.
Claims (3)
1. viscous oil recovery multiple-effect viscosity-depression agent is characterized in that raw materials used and mass percent is:
2. viscous oil recovery multiple-effect viscosity-depression agent according to claim 1 is characterized in that: described hexose hydrochlorate is ferrous gluconate, Zinc Gluconate, levulinic acid iron, levulinic acid zinc.
3. viscous oil recovery multiple-effect viscosity-depression agent according to claim 1 is characterized in that: described polyacrylic ester is that molecular weight is the ethyl propenoate of 5-30 ten thousand and the segmented copolymer of butyl acrylate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101676580A CN102020982B (en) | 2009-09-17 | 2009-09-17 | Multiple-effect viscosity depressant for exploiting thickened oil |
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| CN2009101676580A CN102020982B (en) | 2009-09-17 | 2009-09-17 | Multiple-effect viscosity depressant for exploiting thickened oil |
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| CN102020982A true CN102020982A (en) | 2011-04-20 |
| CN102020982B CN102020982B (en) | 2012-04-18 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108084982A (en) * | 2016-11-21 | 2018-05-29 | 中国科学院化学研究所 | Nano-viscosity reduction pour-point depressant stable emulsion and its preparation method and application |
| CN108865096A (en) * | 2018-06-08 | 2018-11-23 | 烟台智本知识产权运营管理有限公司 | A kind of thickened oil recovery high efficiency composition thinner |
| CN108913114A (en) * | 2018-06-29 | 2018-11-30 | 河南妙天控股有限公司 | A kind of oil exploitation crude oil lysate and preparation method thereof |
| CN111763239A (en) * | 2019-04-02 | 2020-10-13 | 中国石油天然气股份有限公司 | Sodium lauroyl sarcosinate-bacitracin compound and composite oil displacement agent |
| CN111763240A (en) * | 2019-04-02 | 2020-10-13 | 中国石油天然气股份有限公司 | Sodium lauroyl sarcosinate-diglucoside peptide compound and composite oil displacement agent |
| CN115433559A (en) * | 2022-09-29 | 2022-12-06 | 爱森（中国）絮凝剂有限公司 | Preparation of polyacrylamide suitable for high-temperature high-salt oil reservoir oil extraction of sulfur-containing produced water by using eco-friendly viscosity stabilizer |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3905681A1 (en) * | 1989-02-24 | 1990-08-30 | Basf Ag | CONCENTRATED MIXTURES OF GAPPOPOLYMERISATS FROM ESTERS OF UNSATURATED ACIDS AND ETHYLENE-VINYLESTER COPOLYMERISATS |
| CN1037854C (en) * | 1990-08-18 | 1998-03-25 | 成都科技大学 | Fluidity improver for crude oil containing wax |
| CN101235279B (en) * | 2007-02-02 | 2013-04-24 | *** | Highly effective viscosity-reducing agent for thermodynamic oil extraction process |
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2009
- 2009-09-17 CN CN2009101676580A patent/CN102020982B/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108084982A (en) * | 2016-11-21 | 2018-05-29 | 中国科学院化学研究所 | Nano-viscosity reduction pour-point depressant stable emulsion and its preparation method and application |
| CN108865096A (en) * | 2018-06-08 | 2018-11-23 | 烟台智本知识产权运营管理有限公司 | A kind of thickened oil recovery high efficiency composition thinner |
| CN108913114A (en) * | 2018-06-29 | 2018-11-30 | 河南妙天控股有限公司 | A kind of oil exploitation crude oil lysate and preparation method thereof |
| CN111763239A (en) * | 2019-04-02 | 2020-10-13 | 中国石油天然气股份有限公司 | Sodium lauroyl sarcosinate-bacitracin compound and composite oil displacement agent |
| CN111763240A (en) * | 2019-04-02 | 2020-10-13 | 中国石油天然气股份有限公司 | Sodium lauroyl sarcosinate-diglucoside peptide compound and composite oil displacement agent |
| CN111763239B (en) * | 2019-04-02 | 2022-05-10 | 中国石油天然气股份有限公司 | Sodium lauroyl sarcosinate-bacitracin compound and composite oil displacement agent |
| CN111763240B (en) * | 2019-04-02 | 2022-05-10 | 中国石油天然气股份有限公司 | Sodium lauroyl sarcosinate-diglucoside peptide compound and composite oil displacement agent |
| CN115433559A (en) * | 2022-09-29 | 2022-12-06 | 爱森（中国）絮凝剂有限公司 | Preparation of polyacrylamide suitable for high-temperature high-salt oil reservoir oil extraction of sulfur-containing produced water by using eco-friendly viscosity stabilizer |
| CN115433559B (en) * | 2022-09-29 | 2023-12-12 | 爱森（中国）絮凝剂有限公司 | Preparation of polyacrylamide suitable for oil extraction of high-temperature high-salt oil reservoirs containing sulfur produced water by using ecological environment-friendly viscosity stabilizer |
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| CN102020982B (en) | 2012-04-18 |
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