CN102020982B - 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 raising the output, belongs to oilfield chemistry specialty chemicals production field.
Background technology:
Viscous crude is because the gum asphaltic content height causes its viscosity very big; Ultra viscosity of thickened oil can reach more than the 50000mPas (50 ℃), because colloid, asphaltene molecules amount are big, and contains considerable active gene; Can form various Intermolecular Forcess each other; Be flocked on 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 RF, 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, make heat be able to diffusion, 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 RF 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, and is easy to mobile relatively and goes out to the greatest extent than the lightweight part, and 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, 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, causes 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 RF 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 RF.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 RF.
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 RF 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, and 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, and behind the adding hydrophilic surfactant, the hydrophilic group surfactivity is very strong in the crude oil; 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, and the reducing viscosity by emulsifying technology has advantages such as method is simple, economy, 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 is difficult; 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 usedly with mass percent being:
Hexose hydrochlorate 5-15%
Polyacrylic ester 5-15%
N-sodium lauroyl sareosine 5-15%
Sherwood oil or mixed benzene 10-30%
Water surplus.
Above-mentioned hexose hydrochlorate is Irox, 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 Bing Xisuandingzhi.
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 present technology, the present invention has following advantage:
1) viscous oil recovery RF improves obviously: before the oil field field test is illustrated in cyclic steam stimulation, carry out the pretreated oil displacement efficiency of oil reservoir with the present invention and improve 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 raising the output agent use properties.
4) viscosity-depression agent viscosity break ratio of the present invention is high.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 receives 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 flexibility of the present invention is strong, is fit to the butyrous exploitation of multiple viscous crude.
Embodiment
1, be Irox 8% according to mass ratio, the block polymer 5% of ethyl propenoate and Bing Xisuandingzhi, N-sodium lauroyl sareosine 10%, sherwood oil 25%, water 52%.Should several kinds of raw materials mix stir, 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 Irox 10% according to mass ratio, the block polymer 10% of ethyl propenoate, Bing Xisuandingzhi and N-sodium lauroyl sareosine 15% mix benzene 30%, water 35%.Should several kinds of raw materials mix stir, promptly obtain viscous oil recovery multiple-effect viscosity-depression agent.Do the reducing thick oil viscosity test through Karamay oilfield, viscosity break ratio reaches 98%
Claims (3)
1. viscous oil recovery multiple-effect viscosity-depression agent is characterized in that raw materials usedly with mass percent being:
Hexose hydrochlorate 5-15%
Polyacrylic ester 5-15%
N-sodium lauroyl sareosine 5-15%
Sherwood oil or mixed benzene 10-30%
Water surplus.
2. viscous oil recovery multiple-effect viscosity-depression agent according to claim 1 is characterized in that: described hexose hydrochlorate is Irox, 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 Bing Xisuandingzhi.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101676580A CN102020982B (en) | 2009-09-17 | 2009-09-17 | Multiple-effect viscosity depressant for exploiting thickened oil |
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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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| Publication Number | Publication Date |
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| CN102020982A CN102020982A (en) | 2011-04-20 |
| CN102020982B true CN102020982B (en) | 2012-04-18 |
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| CN2009101676580A Active CN102020982B (en) | 2009-09-17 | 2009-09-17 | Multiple-effect viscosity depressant for exploiting thickened oil |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108084982B (en) * | 2016-11-21 | 2020-08-21 | 中国科学院化学研究所 | Nano viscosity-reducing pour-point depressant stable emulsion, preparation method and application thereof |
| 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 |
| 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 |
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2008986A1 (en) * | 1989-02-24 | 1990-08-24 | Gerd Konrad | Concentraded mixtures of graft copolymers of esters of unsaturated acids and ethylene/vinyl ester copolymers |
| CN1059157A (en) * | 1990-08-18 | 1992-03-04 | 成都科技大学 | The waxy crude oil fluidity improver |
| CN101235279A (en) * | 2007-02-02 | 2008-08-06 | 富顺集团控股有限公司 | Highly effective viscosity-reducing agent for thermodynamic oil extraction process |
-
2009
- 2009-09-17 CN CN2009101676580A patent/CN102020982B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2008986A1 (en) * | 1989-02-24 | 1990-08-24 | Gerd Konrad | Concentraded mixtures of graft copolymers of esters of unsaturated acids and ethylene/vinyl ester copolymers |
| CN1059157A (en) * | 1990-08-18 | 1992-03-04 | 成都科技大学 | The waxy crude oil fluidity improver |
| CN101235279A (en) * | 2007-02-02 | 2008-08-06 | 富顺集团控股有限公司 | Highly effective viscosity-reducing agent for thermodynamic oil extraction process |
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| CN102020982A (en) | 2011-04-20 |
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