CN103087283A - Synthetic process for thick oil emulsification and viscosity reducer based on sulfonation degree control - Google Patents
Synthetic process for thick oil emulsification and viscosity reducer based on sulfonation degree control Download PDFInfo
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- CN103087283A CN103087283A CN 201110373912 CN201110373912A CN103087283A CN 103087283 A CN103087283 A CN 103087283A CN 201110373912 CN201110373912 CN 201110373912 CN 201110373912 A CN201110373912 A CN 201110373912A CN 103087283 A CN103087283 A CN 103087283A
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Abstract
The invention discloses a synthetic process for thick oil emulsification and viscosity reducer based on sulfonation degree control. The synthetic process comprises the following steps of: (a), carrying out condensation reaction of octaphenyl polyoxyethyiene and formaldehyde; (b), carrying out sulfonation reaction of inter-condensation polymer and concentrated sulfuric acid, and controlling the sulfonation degree during the reaction process to 0.40-0.45; and (c), finally obtaining the thick oil emulsification and viscosity reducer by neutralization. The synthetic process disclosed by the invention can be used for successfully synthesizing the thick oil emulsification and viscosity reducer, and is high in synthesis efficiency and low in synthesis cost; and moreover, the stability of the product is improved by controlling the sulfonation degree during the reaction process.
Description
Technical field
The present invention relates to a kind of emulsifying and viscosity-reducing agent for condensed oil synthesis technique based on controlling sulfonation degree.
Background technology
Along with Gong the utilization of conventional oil reduces day by day, heavy oil is becoming the next century mankind's important energy source.Through the effort of more than 20 years, global heavy oil industry had than conventional oil tempo faster, and the annual production of viscous crude, tar sand rises to nearly hundred million tons by 2,000 ten thousand tons, and its importance receives people's concern day by day.The difficulty of heavy crude reservoir exploitation is mainly manifested in two aspects: the viscosity of viscous crude is high on the one hand, and the seepage resistance of viscous crude in oil reservoir is large, makes viscous crude not flow into the shaft bottom from oil reservoir; Even on the other hand under reservoir condition, viscous crude can flow into the shaft bottom, but in the process of vertical lifting, impact due to viscous crude factor such as degassed and radiating and cooling in pit shaft, make the viscosity of viscous crude further increase, have a strong impact on the normal operation of the mobile and oil well production equipment of resident fluid in pit shaft.
According to the pertinent data statistics, explored heavy oil resource mainly concentrates on the states such as Venezuela, USSR (Union of Soviet Socialist Republics), the U.S. and Canada in the world at present.The Orinoco heavy oil belt of Venezuela northeast is examined geologic reserve and is reached more than 3,000 hundred million tons.Half of U.S.'s heavy oil resource is distributed in Gary Fu Niya, nearly 40,000,000,000 tons of geologic reserve, remaining half be distributed in the continent, middle part.Canadian heavy oil resource mainly is distributed in four major sedimentary mineral reserve such as Athabasca, cold air lake, dimension Pascal and this river of Alberta, nearly 1,500 hundred million tons of geologic reserve.The heavy oil resource of USSR (Union of Soviet Socialist Republics) mainly is distributed in more than 200 hundred million tons of the Ba Sainuofuyue in West Siberia basin, comprises that also there is extremely abundant viscous crude resource in other country of China.Total geologic reserve of these heavy oil resources adds up more than 6,000 hundred million tons, and in the world conventional oil verify 3,600 hundred million tons of geologic reserve, its workable reserve is only 90,000,000,000 tons.
The viscous crude stock number that China has found is also very abundant, and existing more than 20 of the viscous crude field of discovery is distributed in the areas such as the Liaohe River, triumph, Xinjiang, huge port, Jilin, more than estimating that Chinese heavy petroleum asphalt stock number can reach 300 * 108t.China's viscous crude (highly viscous oil, viscosity is more than 0.1Pas) resource distribution is very wide, and geologic reserve reaches 164 * 108t, and wherein the land viscous crude accounts for more than 20% of oil total resources.The outstanding characteristics of viscous crude are that bituminous matter, gum level are higher.Colloid, the heavy oil production that asphalt content is higher account for 7% of viscous crude ultimate production.
Connect the area in Daqing oil field, Henan, Inner Mongol two in recent years and found important heavy crude reservoir; Also find the viscous crude resource in areas such as Jianghan Oil-field, little, the Northwest Sichuan of peace.Heavy crude reservoir geologic reserve explored and that control has surpassed national common thin oil reserves, estimates also to have from now on new growth.
In the proven reserve of CNPC, common heavy oil accounts for 74.7%, and special viscous crude accounts for 14.4%, and super viscous crude accounts for 10.9%.
Countries in the world mainly rely on traditional thermal methods to the exploitation of high viscosity heavy oil at present, i.e. steam stimulation and steam flood.The supporting technology that China's great majority adopt steam stimulation and pit shaft to mix thin oil is recovered the oil.This method not only consumes a large amount of fuel, but also consumes a large amount of thin oils, thereby has increased widely cost for oil production.Have bibliographical information can use the Emulsifying heavy crude producing, this method is that water phase surfactant mixture is annotated the down-hole, makes full-bodied viscous crude change low viscous water external emulsion extraction into.Reducing viscosity by emulsifying is high due to its viscosity break ratio, cost is low, easy handling, and at home and abroad all there is use in the oil field at present.But the emulsifying pour depressor that uses at present only possesses single heatproof or anti-rock salt performance, namely heatproof again the emulsifying pour depressor of anti-rock salt research and development also seldom.
Tensio-active agent has in viscous oil recovery widely to be used, and at present most popular is non-ionic type and aniorfic surfactant, as polyoxyethylene octylphenol ether and sulfonated petro-leum.But this two classes tensio-active agent all can not be applicable to separately temperature and the high oil reservoir of salinity.There is cloud point in nonionic surface active agent, and outside temperature is higher than cloud point, and tensio-active agent is namely separated out from water; Aniorfic surfactant can be separated out in the water of high salinity.
In the technological process of synthetic emulsifying and viscosity-reducing agent for condensed oil, the sulfonation degree of emulsifying and viscosity-reducing agent for condensed oil has material impact to the reducing viscosity by emulsifying performance, and sulfonation degree is the key that determines the reducing viscosity by emulsifying performance, will directly have influence on the stability of product.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of emulsifying and viscosity-reducing agent for condensed oil synthesis technique based on controlling sulfonation degree is provided, this synthesis technique can successfully synthesize emulsifying and viscosity-reducing agent for condensed oil, and combined coefficient is high, synthetic required cost is low, and pass through to control the sulfonation degree in reaction process, thereby improved the stability of product.
Purpose of the present invention is achieved through the following technical solutions: the emulsifying and viscosity-reducing agent for condensed oil synthesis technique based on controlling sulfonation degree comprises the following steps:
(a) condensation reaction of polyoxyethylene octylphenol ether and formaldehyde;
(b) sulfonation reaction of co-condensation polymer and the vitriol oil, and the sulfonation degree of controlling in reaction process is 0.40～0.45;
(c) neutralization makes emulsifying and viscosity-reducing agent for condensed oil at last.
In described step (a), the concentration of formaldehyde is 50%.
In described step (b), the mass ratio of the vitriol oil and polyoxyethylene octylphenol ether is 0.8: 1～1.4: 1.
In described step (b), sulfonation temperature is 100～150 ℃.
In described step (c), neutralize by NaOH.
In described step (b), the sulfonation degree of controlling in reaction process is 0.42.
In sum, the invention has the beneficial effects as follows: can successfully synthesize emulsifying and viscosity-reducing agent for condensed oil, and combined coefficient is high, synthetic required cost is low, and passes through to control the sulfonation degree in reaction process, thereby has improved the stability of product.
Description of drawings
Fig. 1 is the schematic diagram that concerns of sulfonation degree and stability.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited only to this.
Embodiment:
The emulsifying and viscosity-reducing agent for condensed oil synthesis technique based on the control sulfonation degree that the present embodiment relates to comprises the following steps:
(a) condensation reaction of polyoxyethylene octylphenol ether and formaldehyde;
(b) sulfonation reaction of co-condensation polymer and the vitriol oil, and the sulfonation degree of controlling in reaction process is 0.40～0.45;
(c) neutralization makes emulsifying and viscosity-reducing agent for condensed oil at last.
In described step (a), the concentration of formaldehyde is 50%.
In described step (b), the mass ratio of the vitriol oil and polyoxyethylene octylphenol ether is 0.8: 1～1.4: 1.
In described step (b), sulfonation temperature is 100～150 ℃.
In described step (c), neutralize by NaOH.
In order to obtain in the emulsifying and viscosity-reducing agent for condensed oil synthesis technique best sulfonation degree, the present invention has done the impact experiment of sulfonation degree on the stability of emulsifying and viscosity-reducing agent for condensed oil, experimental result as shown in Figure 1, as shown in Figure 1: the optimum value of sulfonation degree is greatly about 0.42.This explanation sulfonation intensity is excessive or too smallly all be unfavorable for being used as emulsifying and viscosity-reducing agent for condensed oil.When sulfonation degree was too high, on aromatic ring, with two or more sulfonic group, hydrophilic radical shared ratio in molecule was excessive, and the wetting ability of sulfonate polycondensate is too strong, is difficult for entering oil phase, and is unfavorable in the absorption of water-oil interface to molecule.When sulfonation degree was too low, the lipophilicity of sulfonate polycondensate was stronger, was unfavorable for equally being adsorbed on water-oil interface.Both of these case all can reduce the interfacial adsorption film strength, makes the bad stability of viscous oil emulsion.Only have the sulfonate of sulfonation moderate strength to have suitable hydrophile-lipophile balance value, could form stronger adsorption film on the interface.
The above is only preferred embodiment of the present invention, is not the present invention is done any pro forma restriction, and every foundation technical spirit of the present invention, any simple modification, equivalent variations that above embodiment is done are within all falling into protection scope of the present invention.
Claims (6)
1. based on the emulsifying and viscosity-reducing agent for condensed oil synthesis technique of controlling sulfonation degree, it is characterized in that, comprise the following steps:
(a) condensation reaction of polyoxyethylene octylphenol ether and formaldehyde;
(b) sulfonation reaction of co-condensation polymer and the vitriol oil, and the sulfonation degree of controlling in reaction process is 0.40～0.45;
(c) neutralization makes emulsifying and viscosity-reducing agent for condensed oil at last.
2. the emulsifying and viscosity-reducing agent for condensed oil synthesis technique based on controlling sulfonation degree according to claim 1, is characterized in that, in described step (a), the concentration of formaldehyde is 50%.
3. the emulsifying and viscosity-reducing agent for condensed oil synthesis technique based on controlling sulfonation degree according to claim 1, is characterized in that, in described step (b), the mass ratio of the vitriol oil and polyoxyethylene octylphenol ether is 0.8: 1～1.4: 1.
4. the emulsifying and viscosity-reducing agent for condensed oil synthesis technique based on controlling sulfonation degree according to claim 1, is characterized in that, in described step (b), sulfonation temperature is 100～150 ℃.
5. the emulsifying and viscosity-reducing agent for condensed oil synthesis technique based on controlling sulfonation degree according to claim 1, is characterized in that, in described step (c), neutralizes by NaOH.
6. the described emulsifying and viscosity-reducing agent for condensed oil synthesis technique based on controlling sulfonation degree of any one according to claim 1～5, is characterized in that, in described step (b), the sulfonation degree of controlling in reaction process is 0.42.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10407611B2 (en) | 2016-01-08 | 2019-09-10 | Ecolab Usa Inc. | Heavy oil rheology modifiers for flow improvement during production and transportation operations |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10407611B2 (en) | 2016-01-08 | 2019-09-10 | Ecolab Usa Inc. | Heavy oil rheology modifiers for flow improvement during production and transportation operations |
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Application publication date: 20130508 |