CN102925130B - High-water content wax-containing crude oil flowing improver - Google Patents
High-water content wax-containing crude oil flowing improver Download PDFInfo
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- CN102925130B CN102925130B CN201210419451.XA CN201210419451A CN102925130B CN 102925130 B CN102925130 B CN 102925130B CN 201210419451 A CN201210419451 A CN 201210419451A CN 102925130 B CN102925130 B CN 102925130B
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Abstract
The invention discloses a high-water content wax-containing crude oil flowing improver. The high-water content wax-containing crude oil flowing improver comprises Ninol, sodium oleate and water, wherein a mass ratio of Ninol to sodium oleate to water is (6-10): (1-3): (90-94). After being added into crude oil, the high-water content wax-containing crude oil flowing improver improves fluidity of the crude oil and avoids precipitation of wax on a pipe wall so that low temperature transportation of high-water content wax-containing crude oil is realized. The high-water content wax-containing crude oil flowing improver has a low cost and good compatibleness with a lower treatment agent of crude oil. The high-water content wax-containing crude oil flowing improver can utilize a running watering conveying pipe so that heat supplied by a heating furnace is reduced without a change of the existing equipment. The high-water content wax-containing crude oil flowing improver reduces pipe return pressure, reduces damage caused by pipe perforation, and has a low price, good performances, a less use amount, high economic benefits, good practicability and an industry popularization meaning.
Description
Technical field
The invention belongs to technical field of oilfield chemistry, be specifically related to a kind of High water cut, waxy crude oil FLOW IMPROVERS.
Background technology
Water content (crude content is less than 20%) more than 80% in the production fluid of High water cut, waxy crude oil (such as Henan Oil Field king collects block), in crude oil component, wax content is greater than 20%, is about 20-45%, and zero pour is at about 23-45 DEG C.Not only when oil mining, wax deposition in pit shaft, a large amount of cleaning costs need be dropped into, simultaneously, in the defeated process of the collection of crude oil, also can analyse wax, often cause gathering line to block, sprain and press perforation, therefore need to enable natural gas boiler to heat water mixing system, water mixing system temperature is made to be greater than 65 DEG C, the normal conveying of guarantee crude oil.In order to improve the mobility of crude oil, also some commercially available at present crude oil flowability improvers are added when actual production, but these medicament ubiquity selectivity are strong, the circumscribed defect of subject range, be not suitable for the crude oil of this High water cut of Wangji oilfield, high-content wax, and there is price, consumption is large, use cost is high shortcoming.
Summary of the invention
The object of the present invention is to provide and a kind ofly improve crude oil flow performance, High water cut, waxy crude oil FLOW IMPROVERS that cost is low.
In order to realize above object, the technical solution adopted in the present invention is: a kind of High water cut, waxy crude oil FLOW IMPROVERS, be made up of Ninol, sodium oleate and water, wherein the mass ratio of Ninol, sodium oleate and water is: Ninol: sodium oleate: water=(6 ~ 10): (1 ~ 3): (90 ~ 94).
Preferably, described High water cut, waxy crude oil FLOW IMPROVERS, be made up of Ninol, sodium oleate and water, and wherein the mass ratio of Ninol, sodium oleate and water is: Ninol: sodium oleate: water=(7 ~ 9): (2 ~ 3): (91 ~ 93).
Preferred further, described High water cut, waxy crude oil FLOW IMPROVERS, be made up of Ninol, sodium oleate and water, and wherein the mass ratio of Ninol, sodium oleate and water is: Ninol: sodium oleate: water=7.7:3:92.
The chemical name of Ninol is fatty acid distribution of coconut oil diglycollic amide, is yellow viscous liquid.Sodium oleate chemical name is 9-sodium oleate, for white is to yellowish powder.Ninol, sodium oleate are commercial goods.
High water cut provided by the invention, waxy crude oil FLOW IMPROVERS are composite by Ninol, sodium oleate and water, significantly can reduce the interfacial tension of profit, increase the interfacial viscosity of profit, make profit easily form stable milk sap; Significantly can reduce viscosity and the zero pour of crude oil emulsion, the tensio-active agent in crude oil flowability improver plays wettability reversal effect, makes wax deposition surface be reversed to hydrophilic surface, forms oil-in-water emulsion, thus significantly reduces the viscosity of Produced Liquid; Crude oil flowability improver is attracted to oil pipe and is conducive to paraffin on the surface and comes off from surface, is unfavorable for that wax deposits from the teeth outwards, thus can plays wax control result; The penetrating quality of crude oil flowability improver and dispersing property enable it infiltrate in the brilliant gap of wax of open structure, bonding force between wax molecule is weakened, thus cause wax crystalline substance to be broken and be scattered in oil stream, can not assemble and become large, thus make crude oil can smooth flow, to crude oil, there is good flow modifier effect.High water cut of the present invention, waxy crude oil FLOW IMPROVERS can not etching apparatuses, and also can not cause water pollutions, and cost being lower, is desirable crude oil flowability improver.
High water cut provided by the invention, waxy crude oil FLOW IMPROVERS can make crude oil emulsion zero pour and viscosity significantly decline, prove through test, crude oil flowability improver provided by the invention can ensure that production fluid water content is more than 80%, in crude oil component, wax content is greater than 20%, zero pour at the crude oil of about 23-45 DEG C at normal temperature or a little more than the normal conveying under normal temperature, achieve few heating in crude oil transmission process or not heated transportation, High water cut can be made simultaneously, waxy crude oil reduces at Bottomhole pressure resistance, thus reduce gathering line back pressure, guarantee in pipe conveying procedure, not produce pipeline blocking, pressure of spraining perforated phenomenon.High water cut provided by the invention, waxy crude oil FLOW IMPROVERS price is low, consumption is few, at 25 DEG C, during circulation water filling 1600 side, the dosage that adds for the first time of crude oil flowability improver provided by the invention is 200mg/L, it is that 100-120mg/L(adds dosage and refers to the concentration of crude oil flowability improver of the present invention in water mixing that circulation time adds dosage), namely its working concentration adds the working concentration (working concentration of existing crude oil flowability improver be generally 500mg/L) of dosage far below existing conventional crude oil flowability improver, economical and practical, and the follow-up dehydrating of crude oil of system and water conditioning are not had an impact.
The mechanism of action of crude oil flowability improver provided by the invention: after adding crude oil flowability improver provided by the invention by surface installation in crude oil, crude oil is dispersed in the crude oil flowability improver aqueous solution and forms oil-in-water-type (O/W) crude oil emulsion or intend milk sap, the low 2-3 of the comparable pure oil viscosity of viscosity due to an O/W type crude oil emulsion order of magnitude, thus can reduce the apparent viscosity of crude oil greatly; Crude oil flowability improver is adsorbed on tube wall and forms hydrophilic film simultaneously, reduces the frictional resistance of tube wall; The reduction of crude oil apparent viscosity and tube wall frictional resistance all can reduce the energy consumption of crude oil transmission greatly; Under certain condition, forming hydrophilic film and generating O/W type crude oil emulsion two kinds of mechanism has one to occupy an leading position, forming O/W type crude oil emulsion when mixing condition is good is main, and when mixing condition difference, then tube wall forms hydrophilic film is main, now, formed and intend the thick really milk sap of milk sap oil bead diameter, but frictional resistance and viscosity also significantly can reduce.
By adding crude oil flowability improver provided by the invention in crude oil, enhance the mobility of crude oil, and on tube wall not wax deposition, achieve High water cut, the conveying of waxy crude oil low temperature, crude oil flowability improver cost provided by the invention is low, good with the lower end treatment agent compatibleness of crude oil, ensure that High water cut, waxy crude oil in water mixing Heating temperature lower or do not heat water mixing normally carry.Adopt High water cut provided by the invention, waxy crude oil FLOW IMPROVERS can utilize the water mixing transport pipe run, under the condition that existing installation is constant, in crude oil, add crude oil flowability improver, reduce process furnace heat supply.Meanwhile, reduce pipeline back pressure, decrease the harm brought of conduit wiring piercing, saved emulsion splitter usage quantity.Crude oil flowability improver price provided by the invention is low, good product performance, consumption are few, economical and practical, has industry dissemination.
Accompanying drawing explanation
Fig. 1 is that the embodiment of the present invention 1 crude oil flowability improver affects test curve figure to crude oil oil water interfacial tension;
Fig. 2 is that the embodiment of the present invention 1 crude oil flowability improver affects test curve figure to viscosity of crude;
Fig. 3 is the microsctructural photograph of the crude oil emulsion adopting the embodiment of the present invention 1 crude oil flowability improver modified.
Embodiment
Below by specific embodiment, technical scheme of the present invention is described in detail.
Embodiment 1
The High water cut that the present embodiment provides, waxy crude oil FLOW IMPROVERS, be made up of Ninol, sodium oleate and water, and the mass ratio of Ninol, sodium oleate and water is: Ninol: sodium oleate: water=7.7:3:92.
The preparation method of the High water cut that the present embodiment provides, waxy crude oil FLOW IMPROVERS: get the hot water 92kg that temperature is 50 DEG C, in water, first add the Ninol of 7.7kg, stir, abundant dissolving, and then add the sodium oleate of 3kg, continue to stir, until be all uniformly dissolved, obtained High water cut, waxy crude oil FLOW IMPROVERS.
Embodiment 2
The High water cut that the present embodiment provides, waxy crude oil FLOW IMPROVERS, be made up of Ninol, sodium oleate and water, and the mass ratio of Ninol, sodium oleate and water is: Ninol: sodium oleate: water=6:3:94.
Embodiment 3
The High water cut that the present embodiment provides, waxy crude oil FLOW IMPROVERS, be made up of Ninol, sodium oleate and water, and the mass ratio of Ninol, sodium oleate and water is: Ninol: sodium oleate: water=10:1:90.
Embodiment 4
The High water cut that the present embodiment provides, waxy crude oil FLOW IMPROVERS, be made up of Ninol, sodium oleate and water, and the mass ratio of Ninol, sodium oleate and water is: Ninol: sodium oleate: water=7:3:91.
Embodiment 5
The High water cut that the present embodiment provides, waxy crude oil FLOW IMPROVERS, be made up of Ninol, sodium oleate and water, and the mass ratio of Ninol, sodium oleate and water is: Ninol: sodium oleate: water=9:2:93.
Preparation method's step of the High water cut that embodiment 2-5 provides, waxy crude oil FLOW IMPROVERS, with the preparation method of embodiment 1 crude oil flowability improver, is distinguished and is only that Ninol, sodium oleate, water consumption do corresponding change.
The High water cut provided embodiment 1, waxy crude oil FLOW IMPROVERS have carried out following performance test.
Test curve as shown in Figure 1 on the impact (25 DEG C) of crude oil oil water interfacial tension for embodiment 1 crude oil flowability improver.In Fig. 1, curve 1 represents crude oil, the crude oil after the High water cut that curve 2 expression interpolation embodiment 1 provides, waxy crude oil FLOW IMPROVERS.As can be seen from Figure 1, embodiment 1 crude oil flowability improver significantly can reduce oil water interfacial tension, increases the interfacial viscosity of profit.
Embodiment 1 crude oil flowability improver affects test curve as shown in Figure 2 to viscosity of crude.In Fig. 2, curve 1 represents crude oil, the crude oil after the High water cut that curve 2 expression interpolation embodiment 1 provides, waxy crude oil FLOW IMPROVERS.As can be seen from Figure 2, former oil viscosity is significantly reduced after adding the crude oil flowability improver that embodiment 1 provides in crude oil.
The impact of embodiment 1 crude oil flowability improver on crude oil zero pour is shown in Table 1.As can be seen from Table 1, after adding embodiment 1 crude oil flowability improver, the zero pour of crude oil emulsion significantly reduces.
Table 1 crude oil flowability improver is on the impact of crude oil zero pour
The microsctructural photograph (amplifying 100 times) of the crude oil emulsion adopting embodiment 1 crude oil flowability improver modified as shown in Figure 3.Scheme the basis of microscopic observation photo that A is crude oil in Fig. 3, figure B is the basis of microscopic observation photo through the modified crude oil of embodiment 1 crude oil flowability improver.As can be seen from Figure 3, crude oil is modified through embodiment 1 crude oil flowability improver, and under microscope, wax crystalline substance is less.This is because the SURFACTANT ADSORPTION in embodiment 1 crude oil flowability improver is on the surface of wax, makes the dispersion of wax crystalline substance, wax crystalline substance can not be assembled and become large.
The field application test of the High water cut that test example embodiment 1 provides, waxy crude oil FLOW IMPROVERS
2010, the High water cut, the waxy crude oil FLOW IMPROVERS that adopt embodiment 1 to provide at Chai Zhuanzhan have carried out test in place, Henan Oil Field king collects water content (crude content is less than 20%) more than 80% in the production fluid at station, the block bavin village, in crude oil component, wax content is about 30-45%, and zero pour is at about 23-45 DEG C.The crude oil flowability improver of embodiment 1 is squeezed into water jacket furnace outlet water mixing main line through the pressurization of metering dosing pump, each test satellite location is assigned to through water doping valve component, crude oil flowability improver is delivered to well head by water mixing system, then test satellite location is transported to output crude oil mixing collection, Zai Zhichai village petroleum transferring station triphase separator, deviates from sewage afterwards, and sewage is back to water mixing system, complete working cycle, day circulation watering quantity 1600m
3the working concentration of whole process of the test embodiment 1 crude oil flowability improver remains unchanged, for 100mg/L(working concentration refers to the concentration of crude oil flowability improver in water mixing), progressively reduce water mixing temperature, each individual well watering quantity is constant or according to oil well production situation fine tune before keeping test, guarantees that oil well and gathering system normally run.By adding embodiment 1 crude oil flowability improver, making Henan Oil Field king collect station, the block bavin village and normally carrying at low temperatures, realize the low temperature conveying in the defeated process of collection.Circulate every day watering quantity 1600m
3, water mixing temperature is down to 48 DEG C after adding embodiment 1 crude oil flowability improver by 65 DEG C when originally not adding embodiment 1 crude oil flowability improver, and temperature drop 17 DEG C, reduces heating load 1 × 1600 × 10 every day
3× (65-48)=2.72 × 10
7kilocalorie, is equivalent to save Sweet natural gas 2925 cubic metres.From on December 31,14 days to 2010 September in 2010, test 106 days altogether, saving heat energy 106 × 2.72 × 10
7kilocalorie=2.88 × 10
9kilocalorie, amounts to Sweet natural gas 309677 cubic metres.Calculate by this, year saving heat energy 365 × 2.72 × 10
7kilocalorie=9.92 × 10
9kilocalorie, amounts to Sweet natural gas 106.76 ten thousand stere, and the average daily expense consuming embodiment 1 crude oil flowability improver is 260 yuan, 2925 × 0.91-260=2401 unit of daily reducing expenses, remarkable in economical benefits.
Claims (3)
1. High water cut, a waxy crude oil FLOW IMPROVERS, is characterized in that, is made up of Ninol, sodium oleate and water, and wherein the mass ratio of Ninol, sodium oleate and water is: Ninol: sodium oleate: water=(6 ~ 10): (1 ~ 3): (90 ~ 94).
2. High water cut according to claim 1, waxy crude oil FLOW IMPROVERS, it is characterized in that, be made up of Ninol, sodium oleate and water, wherein the mass ratio of Ninol, sodium oleate and water is: Ninol: sodium oleate: water=(7 ~ 9): (2 ~ 3): (91 ~ 93).
3. High water cut according to claim 1 and 2, waxy crude oil FLOW IMPROVERS, is characterized in that, is made up of Ninol, sodium oleate and water, and wherein the mass ratio of Ninol, sodium oleate and water is: Ninol: sodium oleate: water=7.7:3:92.
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| CN201210419451.XA CN102925130B (en) | 2012-10-26 | 2012-10-26 | High-water content wax-containing crude oil flowing improver |
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| CN102925130B true CN102925130B (en) | 2015-01-21 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6261463B1 (en) * | 1999-03-04 | 2001-07-17 | U.S. Polychemical Marine Corp. | Water based oil dispersant |
| CN101475796A (en) * | 2009-01-15 | 2009-07-08 | 山东大学 | Lyotropic liquid crystal flooding system, as well as preparation method and use thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6261463B1 (en) * | 1999-03-04 | 2001-07-17 | U.S. Polychemical Marine Corp. | Water based oil dispersant |
| CN101475796A (en) * | 2009-01-15 | 2009-07-08 | 山东大学 | Lyotropic liquid crystal flooding system, as well as preparation method and use thereof |
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