CN105294896A - Preparation method of viscosity reducer for crude oil gathering and transferring system in heavy oilfield - Google Patents
Preparation method of viscosity reducer for crude oil gathering and transferring system in heavy oilfield Download PDFInfo
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- CN105294896A CN105294896A CN201510854725.1A CN201510854725A CN105294896A CN 105294896 A CN105294896 A CN 105294896A CN 201510854725 A CN201510854725 A CN 201510854725A CN 105294896 A CN105294896 A CN 105294896A
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Abstract
The invention relates to a preparation method of a viscosity reducer for a crude oil gathering and transferring system in a heavy oilfield and belongs to the technical field of oilfield chemicals. The preparation method comprises the following steps: (1) esterification reaction: stirring and heating pentanediol, a polymerization inhibitor (hydroquinone) and a solvent (toluene) to 50-60 DEG C for esterification reaction; (2) polymerization reaction: adding acrylic acid, a catalyst (p-toluenesulfonic acid) and an initiator (benzoyl peroxide), heating to 110-130 DEG C, and performing polymerization reaction for 2-4 h, wherein the molar ratio of acrylic acid to pentanediol is 2: (1-8); (3) washing treatment: using a NaOH solution to neutralize and wash a crude product, then washing, and diluting the product by toluene to obtain the viscosity reducer for the crude oil gathering and transferring system in the heavy oilfield. The preparation method has the advantages that the process is simple, the raw materials are easily accessible, and the product is stable, relatively strong in surface activity, relatively good in hydrophilic-lipophilic property, suitable for low-temperature heavy oil, high in viscosity reduction ratio, low in cost and consumption and the like.
Description
Technical field
The invention belongs to oil field chemical technical field, particularly relate to a kind of preparation method of viscous crude field crude oil gathering system viscosity-depression agent.
Background technology
At present, along with the increase of world's crude oil demand amount, the exploitation of conventional crude can not meet the demand of production development, the breach produced between demand needs the produced quantity constantly increasing viscous crude to fill up, oil field enters the middle and later periods, and crude oil comprehensive is moisture significantly to rise, and crude production rate reduces year by year.In order to increase production and stable yields, go into overdrive on the one hand to increase viscous oil recovery amount, using various chemical combined flooding well stimulation (polymer flooding on the other hand
,ternary composite driving and there is surface-active polymer flooding etc.) improve the recovery ratio in oil field, increase crude production rate; Chemical reaction is there occurs, the mechanical impuritys such as the clay that electroconductibility is strong and solid particulate in the process of crude oil extraction
,being mixed into of the emulsifying agent such as increasing yield and injection and various chemical agents, cause extraction viscosity of crude to increase, structure is very complicated
,stability strengthens.
These viscous crude density are high
,viscosity is large
,resin and asphalt content is high, seriously constrains Cemented filling.The key of head it off manages to reduce thick oil viscosity.And its high viscosity is the macromolecular structure that viscous crude studies on asphaltene and colloid are formed, the main internal factor affecting Viscosity of Heavy Crude Oil is metal heteroatom and the asphalt colloid existed of relying thereof, reducing the macromole such as metal heteroatom or change asphalt colloid in viscous crude is in order to try small molecules, is the fundamental way of reducing thick oil viscosity.Domestic and international method conventional in heavy oil gathering mainly at present: heating method
,emulsifying
,water mixing or active water law
,mixing light oil method etc.But most effective belongs to chemical viscosity reduction method.But it is few to there is kind in existing viscosity-depression agent
,consumption is large
,cost is high, and the technical problems such as novel type viscosity-depression agent exploitation difficulty.
Summary of the invention
The present invention provides a kind of preparation method of viscous crude field crude oil gathering system viscosity-depression agent for solving in known technology the technical problem that exists.
The object of this invention is to provide a kind of technique simple, raw material is easy to get, easy to operate, and product is stablized, and has stronger surfactivity
,good hydrophilic and oleophilic performance
,be applicable to low temperature viscous crude
,viscosity break ratio is high
,with low cost
,the preparation method of the viscous crude field crude oil gathering system viscosity-depression agent of the features such as usage quantity is little.
The building-up process of efficient thick-oil viscosity-depression agent of the present invention: first, pentanediol
,hydroquinone of polymerization retarder (2% of pentanediol quality) and appropriate toluene, be heated to 50-60 DEG C while stirring, esterification occurs, solid is all dissolved.Then, put in autoclave, adjustment pressure, is adding vinylformic acid and catalyzer tosic acid, and initiator benzoyl peroxide, continues to be heated to 120 DEG C, polymerization reaction take place.Reaction times 3h, stops in the NaOH solution of the rear functional quality mark 5% of heating and the thick product of washing, superfluous vinylformic acid and tosic acid in removing reaction solution, then washes more than 3 times with water, to wash out the alkali of surplus.The product toluene of gained is diluted, obtains viscosity-depression agent to be prepared.
The technical scheme that the preparation method of viscous crude field crude oil gathering system viscosity-depression agent of the present invention takes is:
A preparation method for viscous crude field crude oil gathering system viscosity-depression agent, is characterized in that: the preparation process of viscous crude field crude oil gathering system viscosity-depression agent comprises processing step
(1) esterification: pentanediol
,hydroquinone of polymerization retarder and solvent toluene, be heated to 50-60 DEG C under agitation, carries out esterification, make dissolution of solid;
(2)polyreaction: in a kettle., adjustment pressure 1-2MPa, adds vinylformic acid and catalyzer tosic acid
,initiator benzoyl peroxide, the mol ratio of vinylformic acid and pentanediol is 2:1-8, continues to be heated to 110-130 DEG C, carries out polyreaction, reaction times 2-4h;
(3)carrying out washing treatment: use in the NaOH solution of massfraction 3-7% and the thick product of washing, superfluous vinylformic acid and tosic acid in removing reaction solution, then wash out the alkali of surplus with water, product toluene dilutes, and obtains viscous crude field crude oil gathering system viscosity-depression agent.
The preparation method of viscous crude field crude oil gathering system viscosity-depression agent of the present invention can also adopt following technical scheme:
The preparation method of described viscous crude field crude oil gathering system viscosity-depression agent, be characterized in: during esterification, hydroquinone of polymerization retarder is the 1-3% of pentanediol quality, toluene is the 5-10% of pentanediol quality.
The preparation method of described viscous crude field crude oil gathering system viscosity-depression agent, be characterized in: during polyreaction, catalyzer tosic acid is the 3-7% of vinylformic acid quality, initiator benzoyl peroxide and acrylic acid mol ratio are 1:1-3.
The preparation method of described viscous crude field crude oil gathering system viscosity-depression agent, is characterized in: it is characterized in that: when product toluene dilutes, and the consumption of toluene is the 40-60% of total mass.
The advantage that the present invention has and positively effect are:
The preparation method of viscous crude field crude oil gathering system viscosity-depression agent is owing to have employed the brand-new technical scheme of the present invention, and compared with prior art, it is simple that the present invention has technique, easy to operate, product is stablized, safe and reliable, has stronger low temperature viscosity reduction to complicated ingredient viscous crude
,demulsification, and do not affect crude oil and deviate from water quality, consumption is few, and cost is low
,the advantages such as toxic side effect is little, successful.
Embodiment
For summary of the invention of the present invention can be understood further
,characteristic, hereby exemplifies following examples, and is described in detail as follows:
Embodiment 1
A preparation method for viscous crude field crude oil gathering system viscosity-depression agent, preparation process comprises processing step:
(1) esterification: pentanediol
,hydroquinone of polymerization retarder and solvent toluene, be heated to 50-60 DEG C under agitation, carries out esterification, make dissolution of solid; Hydroquinone of polymerization retarder is 2% of pentanediol quality, and toluene is 6% of pentanediol quality.
(2) polyreaction: in a kettle., adjustment pressure 1.5MPa, adds vinylformic acid and catalyzer tosic acid
,initiator benzoyl peroxide, the mol ratio of vinylformic acid and pentanediol is 1:3, continues to be heated to 110-130 DEG C, carries out polyreaction, reaction times 3h; Catalyzer tosic acid is 5% of vinylformic acid quality, and initiator benzoyl peroxide and acrylic acid mol ratio are 1:2.
(3) carrying out washing treatment: use in the NaOH solution of massfraction 5% and the thick product of washing, superfluous vinylformic acid and tosic acid in removing reaction solution, wash out superfluous alkali again with water, product toluene dilutes, the consumption of toluene is 50% of total mass, obtains viscous crude field crude oil gathering system viscosity-depression agent.
Embodiment 2
A kind of preparation method and application of viscous crude field crude oil gathering system viscosity-depression agent are as follows:
The preparation process of viscosity reducer for crude oil JNQ-1 is with embodiment 1.Wherein,
Component proportion: pentanediol and vinylformic acid mol ratio are 2:1, the mol ratio of vinylformic acid and initiator benzoyl peroxide is: 3:1, and catalyzer tosic acid is 5% of vinylformic acid quality, and hydroquinone of polymerization retarder is 2% of pentanediol quality.。
Preparation method: polymeric reaction temperature 50-60 DEG C, the temperature of esterification is 120 DEG C, time 3h.
Experimental subjects: oil transportation sample outside oil field, Bohai Sea Gulf, viscosity 5000mpas;
Experiment equipment: machine,massing
,there-necked flask
,high shearing mixing emulsor
,water bath with thermostatic control
,electronic balance etc.
Experimental technique: enchashment field oil sample, carries out water-bath preheating 15min by temperature 6 DEG C at the scene after stirring, then adds the viscosity-depression agent JNQ-1 of different concns respectively, places for some time, measures Crude viscosity, calculates viscosity break ratio, the results are shown in Table 1.
table 1the viscosity reducing effect of different concns viscosity-depression agent JNQ-01
Embodiment 3
A kind of preparation method and application of viscous crude field crude oil gathering system viscosity-depression agent are as follows:
The preparation process of viscosity reducer for crude oil JNQ-2 with embodiment 1, wherein,
Component proportion: pentanediol and vinylformic acid mol ratio are 3:1, the mol ratio of vinylformic acid and initiator benzoyl peroxide is: 2:1, and catalyzer tosic acid is 5% of vinylformic acid quality, and hydroquinone of polymerization retarder is 2% of pentanediol quality.。
Experimental subjects is identical with enforcement 2 with experimental technique, and experimental result is shown in
table 2.
table 2the viscosity reducing effect of different concns viscosity-depression agent JNQ-02
Embodiment 4
A kind of preparation method and application of viscous crude field crude oil gathering system viscosity-depression agent are as follows:
The preparation process of viscosity reducer for crude oil JNQ-3 is with embodiment 1:
Component proportion: pentanediol and vinylformic acid mol ratio are 3:2, the mol ratio of vinylformic acid and initiator benzoyl peroxide is: 3:2, and catalyzer tosic acid is 5% of vinylformic acid quality, and hydroquinone of polymerization retarder is 2% of pentanediol quality.。
Experimental subjects is identical with embodiment 2 with experimental technique, and experimental result is shown in
table 3.
table 3the viscosity reducing effect of different concns viscosity-depression agent JNQ-3
Embodiment 5
A kind of preparation method and application of viscous crude field crude oil gathering system viscosity-depression agent are as follows:
The preparation process of viscosity reducer for crude oil JNQ-4 is with embodiment 1.Wherein,
Component proportion: pentanediol and vinylformic acid mol ratio are 3:2, the mol ratio of vinylformic acid and initiator benzoyl peroxide is: 3:1, and catalyzer tosic acid is 5% of vinylformic acid quality, and hydroquinone of polymerization retarder is 2% of pentanediol quality.。
Experimental subjects is mutually identical with embodiment 2 with experimental technique, and experimental result is shown in
table 4.
table 4the viscosity reducing effect of different concns viscosity-depression agent JNQ-4
The present embodiment has that described technique is simple, and with strong points, formation effect is good, and SEI film is form compact and stable, improves the positively effects such as the chemical property of lithium-ions battery and cycle life.
Claims (6)
1. a preparation method for viscous crude field crude oil gathering system viscosity-depression agent, is characterized in that: the preparation process of viscous crude field crude oil gathering system viscosity-depression agent comprises processing step:
(1) esterification: pentanediol, hydroquinone of polymerization retarder and solvent toluene, be heated to 50-60 DEG C under agitation, carries out esterification, makes dissolution of solid.
2. polyreaction: in a kettle., adjustment pressure 1-2MPa, adds vinylformic acid and catalyzer tosic acid, initiator benzoyl peroxide, the mol ratio of vinylformic acid and pentanediol is 2:1-8, continue to be heated to 110-130 DEG C, carry out polyreaction, reaction times 2-4h.
3. carrying out washing treatment: use in the NaOH solution of massfraction 3-7% and the thick product of washing, superfluous vinylformic acid and tosic acid in removing reaction solution, wash out superfluous alkali again with water, product toluene dilutes, and obtains viscous crude field crude oil gathering system viscosity-depression agent.
4. the preparation method of viscous crude field crude oil gathering system viscosity-depression agent according to claim 1, is characterized in that: during esterification, and hydroquinone of polymerization retarder is the 1-3% of pentanediol quality, and toluene is the 5-10% of pentanediol quality.
5. the preparation method of viscous crude field crude oil gathering system viscosity-depression agent according to claim 1, it is characterized in that: during polyreaction, catalyzer tosic acid is the 3-7% of vinylformic acid quality, and initiator benzoyl peroxide and acrylic acid mol ratio are 1:1-3.
6. the preparation method of the viscous crude field crude oil gathering system viscosity-depression agent according to claim 1,2 or 3, is characterized in that: when product toluene dilutes, and the consumption of toluene is the 40-60% of total mass.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108410443A (en) * | 2018-04-04 | 2018-08-17 | 青岛艾尔乐新材料有限公司 | Efficient thick-oil thinner |
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| CN1944477A (en) * | 2006-10-11 | 2007-04-11 | 重庆大学 | Poly carboxylic acid series super plasticizer and its preparing method |
| CN104232050A (en) * | 2014-09-05 | 2014-12-24 | 纳百科创(北京)技术开发有限公司 | Compound oil-soluble viscosity reducer for reducing viscosity of thickened oil and preparation method of compound oil-soluble viscosity reducer |
| CN104761173A (en) * | 2014-12-23 | 2015-07-08 | 水利部交通运输部国家能源局南京水利科学研究院 | Polycarboxylate water reducer with good reducing effect and preparation method thereof |
-
2015
- 2015-11-27 CN CN201510854725.1A patent/CN105294896A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1944477A (en) * | 2006-10-11 | 2007-04-11 | 重庆大学 | Poly carboxylic acid series super plasticizer and its preparing method |
| CN104232050A (en) * | 2014-09-05 | 2014-12-24 | 纳百科创(北京)技术开发有限公司 | Compound oil-soluble viscosity reducer for reducing viscosity of thickened oil and preparation method of compound oil-soluble viscosity reducer |
| CN104761173A (en) * | 2014-12-23 | 2015-07-08 | 水利部交通运输部国家能源局南京水利科学研究院 | Polycarboxylate water reducer with good reducing effect and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108410443A (en) * | 2018-04-04 | 2018-08-17 | 青岛艾尔乐新材料有限公司 | Efficient thick-oil thinner |
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