CN110791310A - Demulsifier for dehydrating heavy oil in oil field and preparation method thereof - Google Patents
Demulsifier for dehydrating heavy oil in oil field and preparation method thereof Download PDFInfo
- Publication number
- CN110791310A CN110791310A CN201810870592.0A CN201810870592A CN110791310A CN 110791310 A CN110791310 A CN 110791310A CN 201810870592 A CN201810870592 A CN 201810870592A CN 110791310 A CN110791310 A CN 110791310A
- Authority
- CN
- China
- Prior art keywords
- oil
- demulsifier
- dehydrating
- stirring
- jfc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G33/00—Dewatering or demulsification of hydrocarbon oils
- C10G33/04—Dewatering or demulsification of hydrocarbon oils with chemical means
Abstract
The invention belongs to the technical field of chemical agents for oil fields and preparation, and particularly relates to a demulsifier for dehydrating thick oil in an oil field and a preparation method thereof. The demulsifier consists of a main agent, an oil-in-water emulsifier and a penetrant. The oil-in-water emulsifier is one of alkyl benzene sulfonate, 6501 and 6503, and the penetrant is one of JFC-1, JFC-E and JFC-M. The demulsifier is compounded with the penetrant and the oil-in-water emulsifier, so that the capability of molecules of the demulsifier to quickly reach an oil-water interface can be promoted, the reverse phase process can be promoted, and the demulsification and dehydration process can be accelerated; the demulsifier provided by the invention has the advantages of easily available raw materials, simple synthesis method, low cost, good demulsification effect under low temperature condition, and dehydration rate of more than 95%. Therefore, the invention can be widely applied to the dehydration treatment process of the thick oil in the oil field.
Description
Technical Field
The invention belongs to the technical field of chemical agents for oil fields and preparation, and particularly relates to a demulsifier for dehydrating thick oil in an oil field and a preparation method thereof.
Background
The crude oil dehydration treatment is one of the processes for exporting crude oil into commercial oil, and due to the continuous development of the petroleum industry, the exploitation of thick oil is more and more widely regarded in recent years, and the exploitation amount is also continuously increased. Because the viscosity of the thickened oil is high, the chemical dehydration is difficult compared with that of the thin oil, the dosage of the commonly used thickened oil demulsifier is large, the dehydration temperature is also high, the dehydration of the thickened oil in the eastern oil zone is generally 70-80 ℃, and the dehydration temperature of some thickened oil zones is even as high as 90 ℃. The energy consumption can be reduced by reducing the dehydration temperature, the energy is saved, and the emission of smoke pollutants is reduced.
At present, a demulsifier for dehydrating heavy oil in an oil field is generally a block polyether high-molecular polymer and is prepared by replacing the structure of an initiator, crosslinking a tail end and the like.
Disclosure of Invention
The invention provides a demulsifier for dehydrating thick oil in an oil field and a preparation method thereof aiming at the defects of the prior art. The demulsifier for dewatering thick oil in oil field is prepared with phenolic resin with certain molecular weight as initiator, EO and PO through sectional copolymerization to form main agent and adding oil-in-water emulsifier and penetrant as assistant. Compared with the conventional demulsifier, the dehydration temperature of the demulsifier is reduced by more than 5 ℃, and the dehydration rate is improved by more than 10%; meanwhile, the demulsifier provided by the invention has the advantages of simple preparation process and easily available raw materials.
The invention provides a demulsifier for dehydrating thick oil in an oil field, which consists of a main agent, an oil-in-water emulsifier and a penetrant.
The molecular structural formula of the main agent is as follows:
wherein: m is 2-8, integer; x1, x2 and x3 are the number of propylene oxide chain links, and x1+ x2+ x3 is 2000-3000; y1, y2 and y3 are the number of ethylene oxide chain segments, and y1+ y2+ y3 is 800-.
The oil-in-water emulsifier is one of alkyl benzene sulfonate, 6501 and 6503, and the penetrant is one of JFC-1, JFC-E and JFC-M.
The invention also aims to provide a preparation method of the demulsifier for dehydrating thick oil in an oil field, which comprises the following steps:
(1) adding 1 part of demulsifier main agent into a reaction kettle, heating to 50-60 ℃, stirring for 20-30min at the stirring speed of 400-500 rpm;
(2) slowly adding an oil-in-water emulsifier, and stirring for 40-50min at the stirring speed of 500-600 rpm;
(3) then heating to 75-80 ℃, adding the penetrating agent, stirring for 50-60min at the stirring speed of 300-500rpm, and uniformly stirring to obtain a mixture;
(4) and (3) dissolving the mixture in an organic solvent, and naturally cooling to room temperature to obtain the demulsifier.
The addition amount of the oil-in-water emulsifier is 0.10-0.20 part.
The addition amount of the penetrating agent is 0.15-0.25 part.
The organic solvent is methanol or ethanol, and the addition amount is 0.4-0.6 part.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) the demulsifier has a plurality of hydrophilic lipophilic branched chains in the molecular structure, and has better capability of replacing active substances on the original water-in-oil interfacial film;
(2) the demulsifier is compounded with the penetrant and the oil-in-water emulsifier, so that the capability of molecules of the demulsifier to quickly reach an oil-water interface can be promoted, the reverse phase process can be promoted, and the demulsification and dehydration process can be accelerated;
(3) the demulsifier provided by the invention has the advantages of easily available raw materials, simple synthesis method, low cost, good demulsification effect under low temperature condition, and dehydration rate of more than 95%.
The demulsifying agent adopts the compounding of the demulsifying main agent and the demulsifying auxiliary agent, so that the main agent has a better demulsifying effect due to the structural characteristics of the main agent, the auxiliary agent can assist the main agent to more easily reach a water-in-oil interface on one hand, and can promote the phase inversion of water-in-oil to oil-in-water on the other hand, and the comprehensive effect is that the demulsification and dehydration of crude oil, especially the low-temperature demulsification and dehydration of thick oil can be realized at a lower temperature.
Detailed Description
The present invention is described in further detail below with reference to specific examples and with reference to the data. It will be understood that these examples are intended to illustrate the invention and are not intended to limit the scope of the invention in any way.
Example 1: preparation of demulsifier A
(1) Adding 1 part of main demulsifier agent into a reaction kettle, heating to 50 ℃, and stirring for 20min at the stirring speed of 400 rpm;
(2) slowly adding 0.10 part of oil-in-water emulsifier alkylbenzene sulfonate, and stirring for 40min at a stirring speed of 500 pm;
(3) heating to 75 ℃, adding 10.15 parts of penetrant JFC, stirring for 50min at the stirring speed of 300rpm, and uniformly stirring to obtain a mixture;
(4) and dissolving the mixture in 0.4 part of organic solvent methanol, and naturally cooling to room temperature to obtain the demulsifier A.
The molecular structural formula of the main agent of the demulsifier is as follows:
wherein: m is 2 or 3; x1, x2 and x3 are the number of propylene oxide chain links, and x1+ x2+ x3 is 2000-2200; y1, y2 and y3 are the number of ethylene oxide chain segments, and y1+ y2+ y3 is 800-.
Example 2: preparation of demulsifier B
(1) Adding 1 part of main demulsifier agent into a reaction kettle, heating to 55 ℃, and stirring for 30min at the stirring speed of 460 rpm;
(2) slowly adding 65010.20 parts of oil-in-water emulsifier, and stirring for 45min at the stirring speed of 550 rpm;
(3) then heating to 80 ℃, adding 0.20 part of penetrating agent JFC-E, stirring for 53min at the stirring speed of 400rpm, and uniformly stirring to obtain a mixture;
(4) and dissolving the mixture in 0.5 part of organic solvent methanol, and naturally cooling to room temperature to obtain the demulsifier B.
The molecular structural formula of the main agent of the demulsifier is as follows:
wherein: m is 4 or 5; x1, x2 and x3 are the number of propylene oxide chain links, and x1+ x2+ x3 is 2300-; y1, y2 and y3 are the number of ethylene oxide chain segments, and y1+ y2+ y3 is 900-.
Example 3: preparation of demulsifier C
(1) Adding 1 part of main demulsifier agent into a reaction kettle, heating to 60 ℃, and stirring for 22min at the stirring speed of 500 rpm;
(2) slowly adding 65030.15 parts of oil-in-water emulsifier, and stirring for 50min at the stirring speed of 600 rpm;
(3) then heating to 78 ℃, adding 0.25 part of penetrating agent JFC-M, stirring for 60min at the stirring speed of 500rpm, and uniformly stirring to obtain a mixture;
(4) and dissolving the mixture in 0.6 part of organic solvent ethanol, and naturally cooling to room temperature to obtain the demulsifier C.
The molecular structural formula of the main agent of the demulsifier is as follows:
wherein: m is 7 or 8; x1, x2 and x3 are the number of propylene oxide chain links, and x1+ x2+ x3 is 2800-3000; y1, y2 and y3 are the number of ethylene oxide chain segments, and y1+ y2+ y3 is 1100-.
Example 4 field application of demulsifier to islanding lone tetrad
Island isolated tetrad crude oil: 32% of water;
the addition amount of the demulsifier is as follows: 50 mg/L;
reference agents: the de-emulsifier used in the factory, lone tetrad de-emulsifier;
the demulsification experimental method comprises the following steps: according to the oil and gas industry standard SY/T5281-2000;
treatment time: 2 h;
the island isolated tetrad crude oil has the characteristics of high viscosity and high density, the viscosity of the crude oil at 40 ℃ is 1856 mPa.s, and the density of the crude oil is 0.9802g/cm3Belonging to thick oil; the isolated tetrad produced liquid is produced liquid containing polymers, and the polymer content of the produced liquid is 60-70 mg/L.
TABLE 1 crude oil demulsification dehydration experiment by lone tetrad
From table 1, it can be seen that the thick oil demulsifier of the invention has good demulsification performance on thick oil, the demulsification dehydration efficiency reaches more than 96%, wherein the demulsification dehydration rate of the demulsifier B is 98.3% at most, which is higher than that of the lone-tetrad demulsifier, the average dehydration rate is higher by 18%, and the dehydrated water color is clear.
Example 5 field application of demulsifier to islanding lone-penta
Island isolated quintuplet crude oil: 30% of water;
the addition amount of the demulsifier is as follows: 50 mg/L;
reference agents: the demulsifier used in the factory, namely the lone quintuplet demulsifier;
the demulsification experimental method comprises the following steps: according to the oil and gas industry standard SY/T5281-2000;
treatment time: 2 h;
the island isolated quintuplet crude oil has the characteristics of high viscosity and high density,the viscosity degree of the crude oil at 40 ℃ is 2056 mPas, and the density of the crude oil is 0.9815g/cm3Belonging to thick oil; the isolated quintuplet produced liquid is produced liquid containing polymers, and the polymer content of the produced liquid is 100-120 mg/L.
TABLE 2 emulsion breaking and dewatering experiment for quintuplet crude oil
From the table 2, the thick oil demulsifier disclosed by the invention has good demulsification performance on thick oil, the demulsification and dehydration efficiency reaches more than 97%, wherein the demulsification and dehydration rate of the demulsifier B is 98.5% at most, which is higher than that of the lone-quintuplet demulsifier, the average demulsification and dehydration rate is 20% higher, the dehydrated water color is clear, and the field test effect of the demulsifier disclosed by the invention is good.
Claims (6)
1. The demulsifier for dehydrating the thick oil in the oil field is characterized by consisting of a main agent, an oil-in-water emulsifier and a penetrant;
the molecular structural formula of the main agent is as follows:
wherein: m is 2-8, integer; x1, x2 and x3 are the number of propylene oxide chain links, and x1+ x2+ x3 is 2000-3000; y1, y2 and y3 are the number of ethylene oxide chain links, and y1+ y2+ y3 is 800-;
the oil-in-water emulsifier is one of alkylbenzene sulfonate, 6501 and 6503;
the penetrating agent is one of JFC-1, JFC-E and JFC-M.
2. The preparation method of the demulsifier for dehydrating thick oil in an oil field according to claim 1, which comprises the following steps:
(1) adding 1 part of demulsifier main agent into a reaction kettle, heating to 50-60 ℃, stirring for 20-30min at the stirring speed of 400-500 rpm;
(2) slowly adding an oil-in-water emulsifier, and stirring for 40-50min at the stirring speed of 500-600 rpm;
(3) then heating to 75-80 ℃, adding the penetrating agent, stirring for 50-60min at the stirring speed of 300-500rpm, and uniformly stirring to obtain a mixture;
(4) and (3) dissolving the mixture in an organic solvent, and naturally cooling to room temperature to obtain the demulsifier.
3. The method for preparing the demulsifier for dehydrating thick oil in an oilfield according to claim 2, wherein the oil-in-water emulsifier is added in an amount of 0.10-0.20 parts.
4. The method for preparing the demulsifier for dehydrating thick oil in an oil field according to claim 2 or 3, wherein the penetrant is added in an amount of 0.15-0.25 part.
5. The method for preparing the demulsifier for dehydrating heavy oil in an oilfield according to claim 2 or 3, wherein the organic solvent is methanol or ethanol.
6. The method for preparing the demulsifier for dehydrating thick oil in an oil field according to claim 5, wherein the organic solvent is added in an amount of 0.4-0.6 part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810870592.0A CN110791310A (en) | 2018-08-02 | 2018-08-02 | Demulsifier for dehydrating heavy oil in oil field and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810870592.0A CN110791310A (en) | 2018-08-02 | 2018-08-02 | Demulsifier for dehydrating heavy oil in oil field and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110791310A true CN110791310A (en) | 2020-02-14 |
Family
ID=69425641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810870592.0A Pending CN110791310A (en) | 2018-08-02 | 2018-08-02 | Demulsifier for dehydrating heavy oil in oil field and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110791310A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102453497A (en) * | 2010-10-25 | 2012-05-16 | 中国石油化工股份有限公司 | Demulsification method for hydrocarbon oil |
| CN102925204A (en) * | 2012-10-30 | 2013-02-13 | 中国石油化工股份有限公司 | Foam combination flooding produced liquid demulsifier and preparation method thereof |
| CN103396828A (en) * | 2013-07-26 | 2013-11-20 | 金浦新材料股份有限公司 | Polyether crude oil demulsifier using straight chain alkyl phenolic resin as initiator and preparation method and application thereof |
-
2018
- 2018-08-02 CN CN201810870592.0A patent/CN110791310A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102453497A (en) * | 2010-10-25 | 2012-05-16 | 中国石油化工股份有限公司 | Demulsification method for hydrocarbon oil |
| CN102925204A (en) * | 2012-10-30 | 2013-02-13 | 中国石油化工股份有限公司 | Foam combination flooding produced liquid demulsifier and preparation method thereof |
| CN103396828A (en) * | 2013-07-26 | 2013-11-20 | 金浦新材料股份有限公司 | Polyether crude oil demulsifier using straight chain alkyl phenolic resin as initiator and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109207133B (en) | Thick oil emulsifying viscosity reducer and preparation method thereof | |
| CN102993434B (en) | Preparation method of crude oil rapid demulsifying agent | |
| CN101418230B (en) | Crude de-emulsifier and its preparing process | |
| CN110484228B (en) | Thickened oil viscosity reducer, application thereof and thickened oil viscosity reducing method | |
| CN112375185A (en) | Small-molecule thick oil viscosity reduction polymer and preparation method thereof | |
| US20220213244A1 (en) | Novel demulsifier | |
| CN104232049A (en) | Microemulsion displacement composition for oilfields | |
| CN102382675A (en) | Preparation method of polymer-containing emulsified crude oil emulsion breaker | |
| CN102517069A (en) | Heavy oil low-temperature demulsifier and preparation method thereof | |
| CN1537924A (en) | Low-temperature quick deemulsifying agent for water-containing wax-containing erude oil and its preparation method | |
| CN101497814A (en) | Organosilicon reinforced composite type oil phase dispersed demulsifying agent | |
| CN111203005A (en) | Oil-containing wastewater demulsifier and preparation method and application thereof | |
| CN112592430B (en) | Low-surface-activity polymer thick oil viscosity reducer and preparation method and application thereof | |
| CN116120908B (en) | Preparation method of ultra-thick oil emulsified viscosity-reducing microemulsion | |
| CN110791310A (en) | Demulsifier for dehydrating heavy oil in oil field and preparation method thereof | |
| CN113214336A (en) | Organic boron crosslinking agent based on allyl galactoside and preparation method and application thereof | |
| CN103965850A (en) | Viscosity reducer for crude oil and preparation method thereof | |
| CN104893313B (en) | A kind of viscosity reducer for crude oil and preparation method thereof | |
| CN112979115B (en) | Rapid gel breaker for treating xanthan gum system oil sludge emulsion and preparation method and application thereof | |
| CN102660249B (en) | Oil-in-water type crude oil emulsification viscosity reducer and preparation method thereof | |
| CN113698528B (en) | Acrylate copolymer with ultra-long chain, preparation method, application and demulsifier thereof | |
| CN107418616A (en) | Broad spectrum type ageing oil demulsifier and preparation method thereof | |
| CN114479814A (en) | Temperature-resistant salt-tolerant viscosity reducer for thick oil and preparation method thereof | |
| CN113801645B (en) | Thickened oil viscosity reducing agent, preparation method thereof and thickened oil viscosity reducing method | |
| CN109097094B (en) | Preparation method of nano copolymer crude oil demulsifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200214 |
|
| WD01 | Invention patent application deemed withdrawn after publication |