CN103642518B - A kind of oil field High water cut thick oil demulsifier and preparation method thereof - Google Patents
A kind of oil field High water cut thick oil demulsifier and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of oil field High water cut thick oil demulsifier and preparation method thereof.The invention belongs to dehydrating of crude oil technical field.Oil field High water cut thick oil demulsifier, the preparation method of employing: 1. synthesize initiator: polyethylene polyamine and bisphenol S drip formaldehyde solution at 30-60 DEG C, is warming up to 100-150 DEG C of reaction 1-5h, lyophilize; 2. synthesizing polyether: initiator and oxyethane and propylene oxide through KOH catalyzed polymerization, with acetic acid neutralization, suction filtration desalination; 3. synthesizing epoxy polyethers: polyethers, with after xylene solution dilution, obtains epoxidized polyether A with epichlorohydrin reaction; Drip in triethylene diamine 2-butylene acid methyl esters, then with epichlorohydrin reaction, obtain epoxidized polyether B; 4. synthesize emulsion splitter: epoxidized polyether A and epoxidized polyether B is dissolved in dimethylbenzene, obtains High water cut thick oil demulsifier.Preparation technology of the present invention is simple, easy to operate, has raw material and is easy to get, with low cost, and gained emulsion splitter has that consumption is few, dewatering speed fast, the advantages such as demulsification is good.
Description
Technical field
The invention belongs to dehydrating of crude oil technical field, particularly relate to a kind of oil field High water cut thick oil demulsifier and preparation method thereof.
Background technology
Viscous crude and high viscosity heavy crude, the division of heavy crude and light crude generally with its density for foundation, density is greater than 0.934g/cm
3be mink cell focus.Along with the minimizing year by year of the workable reserve of ordinary crude oils, viscous crude will become the main energy sources of 21 century, but viscous oil recovery is more difficult, therefore also just adds the difficulty that viscous crude utilizes.Late 1990s, the output in oil field reduces gradually, and in order to maintain crude production rate, each oil field all takes the method increasing water filling to improve crude oil yield, cause oil well produced liquid water ratio to rise rapidly, many oil fields have been in the middle and high Water-cut Period development phase.Simultaneously, in various employing process, the application of a large amount of oil recovery auxiliary agent also makes crude oil, particularly the Produced Liquid composition of viscous crude becomes more complicated, causes the efficient fast emulsion breaking of viscous crude and special thick oil to become to affect the gordian technique of cost for oil production, crude quality, output and the environmental pollution of control oil field.The outstanding feature of viscous crude is that asphaltenes, colloid are more, and colloid, pitch can be adsorbed on water-oil interface, reduce interfacial tension, make crude oil emulsion become very stable, so the dehydration of viscous crude is more difficult than the dehydration of ordinary crude oils.
There is raw material complexity in existing High water cut thick oil demulsifier, preparation cost is high, and product consumption is large, and dehydrating of crude oil process is slow, and the technical problems such as emulsion splitter weak effect, therefore synthesize a kind of emulsion splitter for High water cut viscous crude and also just seem more and more urgent.
Summary of the invention
The present invention provides a kind of oil field High water cut thick oil demulsifier and preparation method thereof for solving in known technology the technical problem that exists.
The object of this invention is to provide one to have raw material and be easy to get, with low cost, demulsification is good, and preparation technology is simple, easy to operate, controls easily, the oil field High water cut thick oil demulsifier of production efficiency high.
The technical scheme that oil field of the present invention High water cut thick oil demulsifier is taked is:
A kind of oil field High water cut thick oil demulsifier, be characterized in: the synthesis material of High water cut thick oil demulsifier is polyethylene polyamine, bisphenol S, formaldehyde, KOH catalyzer, oxyethane, propylene oxide, acetic acid, dimethylbenzene, triethylene diamine, 2-butylene acid methyl esters, epoxy chloropropane, takes following technique to synthesize:
1) synthesize initiator: polyethylene polyamine and bisphenol S drip formaldehyde solution at 30-60 DEG C, and the mol ratio of polyethylene polyamine, bisphenol S and formaldehyde is (0.5-1): (5-7): (3-5), be then warming up to 100-150 DEG C of reaction 1-5h, lyophilize;
2) synthesizing polyether: 110 DEG C-150 DEG C, under 0.2-0.5MPa condition, initiator and oxyethane and propylene oxide are through KOH catalyzed polymerization, and the mol ratio of its ethylene oxide and propylene oxide is 1:3-3:1, with acetic acid neutralization, suction filtration desalination;
3) synthesizing epoxy polyethers: polyethers with after xylene solution dilution, 100-150 DEG C, under 0.1-0.6MPa, obtain epoxidized polyether A with epichlorohydrin reaction, wherein the mol ratio of polyethers and epoxy chloropropane is 1:(3-6);
In triethylene diamine, drip 2-butylene acid methyl esters, the mol ratio of triethylene diamine and 2-butylene acid methyl esters is (3-5): (0.5-1), stirring reaction 0.5-1.5h, be warming up to 70-110 DEG C, reaction 12-30h, then with epichlorohydrin reaction, obtain epoxidized polyether B;
4) emulsion splitter is synthesized: epoxidized polyether A and epoxidized polyether B is dissolved in dimethylbenzene, obtains High water cut thick oil demulsifier.
Oil field of the present invention High water cut thick oil demulsifier can also adopt following technical scheme:
Described oil field High water cut thick oil demulsifier, is characterized in: synthesis emulsion splitter time, epoxidized polyether A and epoxidized polyether B is with mol ratio 1:(0.9-1.1) ratio be dissolved in dimethylbenzene.
It is simple that two of object of the present invention is to provide a kind of technique, easy to operate, controls easily, with low cost, the oil field of the features such as product demulsification the is good preparation method of High water cut thick oil demulsifier.
The technical scheme that the preparation method of oil field of the present invention High water cut thick oil demulsifier takes is:
A preparation method for oil field High water cut thick oil demulsifier, is characterized in: the preparation method of High water cut thick oil demulsifier comprises following processing step:
1) initiator is synthesized: synthesis initiator: polyethylene polyamine and bisphenol S drip formaldehyde solution at 30-60 DEG C, the mol ratio of polyethylene polyamine, bisphenol S and formaldehyde is (0.5-1): (5-7): (3-5), then 100-150 DEG C of reaction 1-5h is warming up to, lyophilize;
2) synthesizing polyether: 110 DEG C-150 DEG C, under 0.2-0.5MPa condition, initiator and oxyethane and propylene oxide are through KOH catalyzed polymerization, and the mol ratio of its ethylene oxide and propylene oxide is 1:3-3:1, with acetic acid neutralization, suction filtration desalination;
3) synthesizing epoxy polyethers: polyethers with after xylene solution dilution, 100-150 DEG C, under 0.1-0.6MPa, obtain epoxidized polyether A with epichlorohydrin reaction, wherein the mol ratio of polyethers and epoxy chloropropane is 1:(3-6);
In triethylene diamine, drip 2-butylene acid methyl esters, the mol ratio of triethylene diamine and 2-butylene acid methyl esters is (3-5): (0.5-1), stirring reaction 0.5-1.5h, be warming up to 70-110 DEG C, reaction 12-30h, then with epichlorohydrin reaction, obtain epoxidized polyether B;
4) emulsion splitter is synthesized: epoxidized polyether A and epoxidized polyether B is dissolved in dimethylbenzene, obtains High water cut thick oil demulsifier.
The preparation method of oil field of the present invention High water cut thick oil demulsifier can also adopt following technical scheme:
The preparation method of described oil field High water cut thick oil demulsifier, is characterized in: synthesis emulsion splitter time, epoxidized polyether A and epoxidized polyether B is with mol ratio 1:(0.9-1.1) ratio be dissolved in dimethylbenzene.
The advantage that the present invention has and positively effect are:
Oil field High water cut thick oil demulsifier and preparation method thereof is owing to have employed the brand-new technical scheme of the present invention, and compared with prior art, the present invention has the following advantages:
1, there is good demulsification.Under same concentrations, compare with other emulsion splitter, the dehydrating effect of product P RJ-001 of the present invention is best.For emulsion splitter of the same race, when concentration is 10PPM, dehydration rate just can reach 98%.
2, gained emulsion splitter consumption of the present invention is few, and cost is low, and raw material is easy to get.
Embodiment
For summary of the invention of the present invention, Characteristic can be understood further, hereby exemplify following examples and be described in detail as follows:
Embodiment 1
A kind of oil field High water cut thick oil demulsifier, its raw material adopted is polyethylene polyamine, bisphenol S, formaldehyde, KOH catalyzer, oxyethane, propylene oxide, acetic acid, dimethylbenzene, triethylene diamine, 2-butylene acid methyl esters, epoxy chloropropane, takes following technique to synthesize:
1) initiator is synthesized: polyethylene polyamine and bisphenol S drip formaldehyde solution at 30-60 DEG C, the mol ratio of polyethylene polyamine, bisphenol S and formaldehyde is 1:5:4, then be warming up to 120 DEG C of reaction 3h, by product lyophilize, obtain homemade phenol amine aldehyde resin initiator.
2) synthesizing polyether: under KOH catalysis, by the oxyalkylated operational condition of preparation, the consumption of KOH catalyzer is 0.22%-0.27%, 140 DEG C, under 0.4MPa condition, initiator and oxyethane and propylene oxide are through KOH catalyzed polymerization, and the mol ratio of its ethylene oxide and propylene oxide is 1:1, and product acetic acid is neutralized to pH=7, suction filtration desalination, can obtain polyethers.
3) synthesizing epoxy polyethers: polyethers is with after xylene solution dilution, and at 120 DEG C, under 0.5MPa, obtain epoxidized polyether A with epichlorohydrin reaction, wherein the mol ratio of polyethers and epoxy chloropropane is 1:3;
Drip in triethylene diamine 2-butylene acid methyl esters, triethylene diamine and 2-butylene acid methyl esters mol ratio be 3:1, stirring reaction 1h, is warming up to 90 DEG C, reacts after 1 day, then with appropriate epichlorohydrin reaction, obtain epoxidized polyether B;
4) emulsion splitter is synthesized: epoxidized polyether A and epoxidized polyether B is dissolved in dimethylbenzene with the ratio of mol ratio 1:1, obtains High water cut thick oil demulsifier.
Embodiment 2
A preparation method for oil field High water cut thick oil demulsifier, preparation method comprises following processing step:
1) initiator is synthesized: polyethylene polyamine and bisphenol S drip formaldehyde solution at 50 DEG C, the mol ratio of polyethylene polyamine, bisphenol S and formaldehyde is 1:7:5, then be warming up to 150 DEG C of reaction 3h, by product lyophilize, obtain homemade phenol amine aldehyde resin initiator.
2) synthesizing polyether: under KOH catalysis, by the oxyalkylated operational condition of preparation, the consumption of KOH catalyzer is 0.25%, 110 DEG C, under 0.2MPa condition, initiator and oxyethane and propylene oxide are through KOH catalyzed polymerization, and the mol ratio of its ethylene oxide and propylene oxide is 2:1, and product acetic acid neutralizes, suction filtration desalination, can obtain polyethers.
3) synthesizing epoxy polyethers: polyethers is with after xylene solution dilution, and at 150 DEG C, under 0.6MPa, obtain epoxidized polyether A with epichlorohydrin reaction, wherein the mol ratio of polyethers and epoxy chloropropane is 1:6;
Drip in triethylene diamine 2-butylene acid methyl esters, triethylene diamine and 2-butylene acid methyl esters mol ratio be 5:1, stirring reaction 1.5h, is warming up to 100 DEG C, reacts after 1 day, then with appropriate epichlorohydrin reaction, obtain epoxidized polyether B;
4) emulsion splitter is synthesized: epoxidized polyether A and epoxidized polyether B is dissolved in dimethylbenzene with the ratio of mol ratio 1:1, obtains High water cut thick oil demulsifier PRJ-001.
Embodiment 3
The dehydrating effect of simulation High water cut viscous crude in experiment, the evaluation method that experiment adopts oil and gas industry standard SY-T5281-2000 crude oil demulsifier use properties detection method (bottle examination method) to specify.Embodiment 2 gained High water cut thick oil demulsifier PRJ-001.
Experimental temperature is 70 DEG C, Water in oil 60.4%, water oil ratio 70:30, and experimental result is as following table:
The demulsification of the different emulsion splitter of table 1
Wherein, PRO-001--PRO-007 is the emulsion splitter for the synthesis of High water cut viscous crude.
Embodiment 4
The dehydrating effect of simulation High water cut viscous crude in experiment, the evaluation method that experiment adopts oil and gas industry standard SY-T5281-2000 crude oil demulsifier use properties detection method (bottle examination method) to specify.Embodiment 2 gained High water cut thick oil demulsifier PRJ-001.
Experimental temperature is 70 DEG C, Water in oil 60.4%, water oil ratio 70:30, and experimental result is as following table:
The different adding consistency demulsification of table 2
The present embodiment has described raw material and is easy to get, with low cost, and demulsification is good, and preparation method is simple, simple operation, and it is few that gained emulsion splitter has consumption, the dehydrating amount large and dewatering speed positively effect such as soon.
Claims (2)
1. an oil field High water cut thick oil demulsifier, it is characterized in that: the synthesis material of High water cut thick oil demulsifier is polyethylene polyamine, bisphenol S, formaldehyde, KOH catalyzer, oxyethane, propylene oxide, acetic acid, dimethylbenzene, triethylene diamine, 2-butylene acid methyl esters, epoxy chloropropane, takes following technique to synthesize:
1) initiator is synthesized: polyethylene polyamine and bisphenol S drip formaldehyde solution at 30-60 DEG C, the mol ratio of polyethylene polyamine, bisphenol S and formaldehyde is (0.5-1): (5-7): (3-5), then 100-150 DEG C of reaction 1-5h is warming up to, lyophilize;
2) synthesizing polyether: 110 DEG C-150 DEG C, under 0.2-0.5MPa condition, initiator and oxyethane and propylene oxide are through KOH catalyzed polymerization, and the mol ratio of its ethylene oxide and propylene oxide is 1:3-3:1, with acetic acid neutralization, suction filtration desalination;
3) synthesizing epoxy polyethers: polyethers with after xylene solution dilution, 100-150 DEG C, under 0.1-0.6MPa, obtain epoxidized polyether A with epichlorohydrin reaction, wherein the mol ratio of polyethers and epoxy chloropropane is 1:(3-6);
In triethylene diamine, drip 2-butylene acid methyl esters, the mol ratio of triethylene diamine and 2-butylene acid methyl esters is (3-5): (0.5-1), stirring reaction 0.5-1.5h, be warming up to 70-110 DEG C, reaction 12-30h, then with epichlorohydrin reaction, obtain epoxidized polyether B;
4) synthesize emulsion splitter: epoxidized polyether A and epoxidized polyether B is with mol ratio 1:(0.9-1.1) ratio be dissolved in dimethylbenzene, obtain High water cut thick oil demulsifier.
2. an oil field preparation method for High water cut thick oil demulsifier, is characterized in that: the preparation method of High water cut thick oil demulsifier comprises following processing step:
1) initiator is synthesized: synthesis initiator: polyethylene polyamine and bisphenol S drip formaldehyde solution at 30-60 DEG C, the mol ratio of polyethylene polyamine, bisphenol S and formaldehyde is (0.5-1): (5-7): (3-5), then 100-150 DEG C of reaction 1-5h is warming up to, lyophilize;
2) synthesizing polyether: 110 DEG C-150 DEG C, under 0.2-0.5MPa condition, initiator and oxyethane and propylene oxide are through KOH catalyzed polymerization, and the mol ratio of its ethylene oxide and propylene oxide is 1:3-3:1, with acetic acid neutralization, suction filtration desalination;
3) synthesizing epoxy polyethers: polyethers is with after xylene solution dilution, and under 100-150 DEG C, 0.1-0.6MPa, obtain epoxidized polyether A with epichlorohydrin reaction, wherein the mol ratio of polyethers and epoxy chloropropane is 1:(3-6);
In triethylene diamine, drip 2-butylene acid methyl esters, the mol ratio of triethylene diamine and 2-butylene acid methyl esters is (3-5): (0.5-1), stirring reaction 0.5-1.5h, be warming up to 70-110 DEG C, reaction 12-30h, then with epichlorohydrin reaction, obtain epoxidized polyether B;
4) synthesize emulsion splitter: epoxidized polyether A and epoxidized polyether B is with mol ratio 1:(0.9-1.1) ratio be dissolved in dimethylbenzene, obtain High water cut thick oil demulsifier.
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