CN103450864B - A kind of pour-viscosity reduction solid antiwax agent - Google Patents
A kind of pour-viscosity reduction solid antiwax agent Download PDFInfo
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- CN103450864B CN103450864B CN201210169266.XA CN201210169266A CN103450864B CN 103450864 B CN103450864 B CN 103450864B CN 201210169266 A CN201210169266 A CN 201210169266A CN 103450864 B CN103450864 B CN 103450864B
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- amphoterics
- compound
- nonionogenic tenside
- pour
- wax
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Abstract
The present invention relates to a kind of pour-viscosity reduction solid antiwax agent; The compound of amphoterics and nonionogenic tenside is 15-20%, and solid polyethylene is 34-42.5%, and pour point depressant is 37.5-51%; Amphoterics is hexadecyldimethyl benzyl ammonium azochlorosulfonate propyl lycine; Nonionogenic tenside is Brij58 compound; The mol ratio of amphoterics and nonionogenic tenside is 5:1; Pour point depressant is the compound of EVA multipolymer and fumaric acid-vinyl acetate copolymer; Mass ratio is 3:1; It can reduce high wax content oil viscosity & gt; 80%, reduce condensation point of crude oil and reach 11 DEG C, there is good resistance to elevated temperatures, avoid because heat washes impact on wax control result; Concentration is when 200mg/l, and inhibiting rate for wax precipitation just can reach 75% ~ 80%; Paraffin inhibitor chemical can reach 400 days duration of service.
Description
Technical field
The present invention relates to the chemical additive preventing oil well paraffinication in a kind of oil recovery process, particularly relate to a kind of reduction and contain high wax content oil viscosity, the condensation point that Microcrystalline Wax is master, anti-high heat washes the solid paraffin control block of temperature.
Background technology
Oil well in process of production wax deposition seriously can affect the normal production fluid of oil well, even occurs the phenomenons such as wax card tubing string, paraffin blockage surface pipeline, not only will drop into a large amount of human and material resources, financial resources carry out well-flushing, pump detection and workover frequently, and directly affect oil well production.Every mouthful of oil well all carries out daily filling paraffin remover according to practical production status and regular heat is washed at present.Solid antiwax agent also has application on oil well, but because Microcrystalline Wax is to oil (C
16below) ratio of component paraffin has larger avidity, and general solid antiwax agent is not high enough to this high wax content oil inhibiting rate for wax precipitation.
Summary of the invention
Solid antiwax agent that the object of this invention is to provide a kind of viscosity reduction pour point depression, that for Microcrystalline Wax be main high wax content oil.This solid antiwax agent according to on-the-spot needs, can make different shapes, adopts and directly adds or with the dosing of anti wax pipe mode, can reach the effect of a long-term wax control of dosing.This technology has that technique is simple, wax control efficiency is high, heat can be avoided to wash the features such as the injury of formation, validity period are long; Down-hole pipe, roofbolt load can be reduced, extend the pump detection period caused because of wax deposition.
The technical solution used in the present invention is:
Determine that the compound of EVA multipolymer and fumaric acid-vinyl acetate copolymer is pour point depressant, solid polyethylene is for dissolving control agent, and the compound of amphoterics and nonionogenic tenside is the solid antiwax agent of viscosity-depression agent.Wherein amphoterics is hexadecyldimethyl benzyl ammonium azochlorosulfonate propyl lycine, and its molecular formula is C
21h
45nO
3s, yellow liquid.Nonionogenic tenside is Brij58 compound (Brij58), and its molecular formula is C
16h
33(OC
2h
4)
20OH, the mol ratio of amphoterics and nonionogenic tenside is 5:1.Pour point depressant is the compound of EVA multipolymer (EVA) and fumaric acid-vinyl acetate copolymer, and the mass ratio of the former with the latter is 3:1.
Preparation method: the medicament in formula joins in rubber mixing machine according to a certain percentage, at high temperature (100 ~ 160 DEG C) carry out mixing, evenly, are put in masterplate, molded by vulcanizer under high pressure-temperature (10Mpa, 75 DEG C).
Solid antiwax agent of the present invention can reduce conventional wax removal effectively and heat washes operation, reduces viscosity of crude; In Changqing oilfields application, this paraffin inhibitor chemical can reduce condensation point of crude oil and reach 11 DEG C, viscosity break ratio >80%; During consumption 200mg/l, for containing inhibiting rate for wax precipitation >=75% that Microcrystalline Wax is main waxy crude oil; Reduce down-hole pipe, roofbolt load, Extended Pump Detection Period.
Embodiment:
Embodiment 1:
By hexadecyldimethyl benzyl ammonium azochlorosulfonate propyl lycine with Brij58 in molar ratio for 5:1 mixes, obtain viscosity-depression agent; EVA multipolymer is mixed for 3:1 in mass ratio with fumaric acid-vinyl acetate copolymer, obtains pour point depressant; By mass percent, solid polyethylene 35%, pour point depressant 50%, viscosity-depression agent 15% are added in rubber mixing machine successively, carry out mixing at 150 DEG C, evenly, be put in masterplate, molded by vulcanizer under high pressure-temperature (10Mpa, 75 DEG C).
Embodiment 2:
By hexadecyldimethyl benzyl ammonium azochlorosulfonate propyl lycine with Brij58 in molar ratio for 5:1 mixes, obtain viscosity-depression agent; EVA multipolymer is mixed for 3:1 in mass ratio with fumaric acid-vinyl acetate copolymer, obtains pour point depressant; By mass percent, solid polyethylene 41%, pour point depressant 39%, viscosity-depression agent 20% are added in rubber mixing machine successively, carry out mixing at 155 DEG C, evenly, be put in masterplate, molded by vulcanizer under high pressure-temperature (10Mpa, 75 DEG C).
Indoor solid antiwax agent is dissolved in kerosene, adds the wax sample of the white 102-1 well of 5% for tested object with the Changqing oilfields seven factory white 102-2 well crude oil that recover the oil, evaluate the effect of solid antiwax agent.
Table 1 solid antiwax agent Lab-evaluation is tested
From experimental data, during solid paraffin control agent concentration 200mg/l, embodiment 1 viscosity break ratio 80.4%, reduces condensation point of crude oil 11.8 DEG C, inhibiting rate for wax precipitation 78.2%; Embodiment 2 viscosity break ratio 86.1%, reduces condensation point of crude oil 10.4 DEG C, inhibiting rate for wax precipitation 75.4%.
Embodiment 3:
Apply solid antiwax agent of the present invention to test at Changqing oilfields seven factories, the 15 mouthfuls of wells that recover the oil, average inhibiting rate for wax precipitation 75.8%, reduce load and extend the Be very effective of wax period.Testing data table is as follows:
Table 2 solid antiwax agent effect of field application
As seen from the above table, after using solid paraffin control block of the present invention, on average can reduce load 9.85KN, pump detection period on average can extend 143.9%.
Claims (1)
1. a pour-viscosity reduction solid antiwax agent, is characterized in that: each component by mass percentage: the compound of amphoterics and nonionogenic tenside is 15-20%, and solid polyethylene is 34-42.5%, and pour point depressant is 37.5-51%;
Described amphoterics is hexadecyldimethyl benzyl ammonium azochlorosulfonate propyl lycine, and its molecular formula is C
21h
45nO
3s, yellow liquid;
Described nonionogenic tenside is Brij58 compound, and its molecular formula is C
16h
33(OC
2h
4)
20oH;
The mol ratio of amphoterics and nonionogenic tenside is 5:1;
Described pour point depressant is the compound of EVA multipolymer and fumaric acid-vinyl acetate copolymer; The mass ratio of the former with the latter is 3:1; Wherein EVA multipolymer is white powder, and fumaric acid-vinyl acetate copolymer liquid is light yellow transparent liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210169266.XA CN103450864B (en) | 2012-05-28 | 2012-05-28 | A kind of pour-viscosity reduction solid antiwax agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210169266.XA CN103450864B (en) | 2012-05-28 | 2012-05-28 | A kind of pour-viscosity reduction solid antiwax agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103450864A CN103450864A (en) | 2013-12-18 |
| CN103450864B true CN103450864B (en) | 2016-03-09 |
Family
ID=49733710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210169266.XA Active CN103450864B (en) | 2012-05-28 | 2012-05-28 | A kind of pour-viscosity reduction solid antiwax agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103450864B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107057669B (en) * | 2017-06-21 | 2018-01-16 | 东北石油大学 | Wax control device special solid crude oil wax-proofing agent |
| CN109114426B (en) * | 2017-06-26 | 2020-09-04 | 中国石油天然气集团公司 | Composition for crude oil pour point depressant, preparation method and application |
| CN110511732B (en) * | 2019-09-16 | 2022-03-01 | 西南石油大学 | Inhibitor capable of preventing wax from penetrating deep into stratum and preparation method and application thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6322621B1 (en) * | 1999-05-24 | 2001-11-27 | Nuritchem, Llc (La) | Chemical method of liquefaction and dispersion of paraffin waxes, asphaltenes and coke derived from various sources |
| CN102250604A (en) * | 2011-05-27 | 2011-11-23 | 门正国 | Controlled releasing microcapsule for scale prevention, wax prevention or viscosity reduction of oil well |
| CN102321461A (en) * | 2011-07-01 | 2012-01-18 | 西安瑞捷生物科技有限公司 | Oil well is with biochemical anti-wax stone of solid and preparation method thereof |
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2012
- 2012-05-28 CN CN201210169266.XA patent/CN103450864B/en active Active
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| CN103450864A (en) | 2013-12-18 |
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