CN104099122B - A kind of ageing oil treatment process - Google Patents
A kind of ageing oil treatment process Download PDFInfo
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- CN104099122B CN104099122B CN201310114350.6A CN201310114350A CN104099122B CN 104099122 B CN104099122 B CN 104099122B CN 201310114350 A CN201310114350 A CN 201310114350A CN 104099122 B CN104099122 B CN 104099122B
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Abstract
A kind of ageing oil treatment process, belongs to oil development technical field.Containing following steps; Ageing oil after filling emulsion splitter is injected in reinjection well carbonate rock fractured cave, utilizes this well stratum high-temperature characteristic, by the ageing oil natural decomposition of the impurity such as sludge containing, slag; According to the gap exploitation pattern of this reinjection well water filling for oil, by the ageing oil extraction again after decomposition in seam hole; Emulsion splitter (2# emulsion splitter) Ingredient Wt ratio is: WD-5:WD-4:WD-1=8:2:2, and wherein WD-5 is polyoxyethylene propylene oxide ether; WD-4 is the rare ether of phenol-amine resin oxyethylene epoxy third; WD-1 is alkyl phenolic resin type oxyethylene propylene oxide ether.
Description
Technical field
The present invention relates to a kind of ageing oil treatment process, belong to oil development technical field.
Background technology
Ageing oil is that a kind of electroconductibility is strong, the crude oil sludge of electrochemistry breakdown of emulsion difficulty or landing oil, exists, in multilayer shape, is highly stable oil in water emulsion system, adopts the defeated dehydration means of general collection, be difficult to process with oil-water intermediate layer form.
At present, ageing oil treatment process mainly contains: electrochemical treatment, Centrifugal dispersion method, ultrasonication method, biological treatment, microwave treatment method etc., great majority are processed ageing oil by configuring special ageing oil treatment unit, as: No. 200320126151.9 Chinese patent application disclose a kind of complete equipment for treating oil field ageing oil, this device is by grug feeding jar, process furnace, strainer, the compositions such as hydrocyclone structure, this device is utilized to process Daqing crude oil ageing oil, electrical dehydrator can be entered, finally ageing oil can be processed into qualified outer output oil, but Processes and apparatus is too complicated.Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of ageing oil treatment process.The present invention is different from above-mentioned conventional treatment method, is the new way being applicable to the ageing oil process of carbonatite oil field.
The object of the present invention is to provide a kind of ageing oil treatment process, both the characteristic of carbonatite production characteristic and wellbore formation high temperature had been used, the ageing oil of the impurity such as sludge containing, slag is injected in pit shaft in filling emulsion splitter situation, utilizes stratum high-temperature in well to reach the object of natural decomposition ageing oil.
A kind of ageing oil treatment process, containing following steps;
Ageing oil after filling emulsion splitter is injected in reinjection well carbonate rock fractured cave, utilizes this well stratum high-temperature characteristic, by the ageing oil natural decomposition of the impurity such as sludge containing, slag;
According to the gap exploitation pattern of this reinjection well water filling for oil, by the ageing oil extraction again after decomposition in seam hole.
Emulsion splitter (2# emulsion splitter), its component ratio is: WD-5:WD-4:WD-1=8:2:2, and wherein WD-5 is polyoxyethylene propylene oxide ether; WD-4 is the rare ether of phenol-amine resin oxyethylene epoxy third; WD-1 is alkyl phenolic resin type oxyethylene propylene oxide ether.
2# emulsion splitter must meet the following conditions: 1, the ageing oil of this emulsion splitter to scene has good demulsification, and further obvious with the rising of temperature.
2, this emulsion splitter demulsification under the reservoir temperature environment of corresponding reinjection well is good, and stable performance.
For realizing the object of the invention, reinjection well provided by the invention need meet following 3 conditions:
1, the oil well of constant volume acid carbonate petrosal foramen hole oil reservoir must be selected, aqueous carbonate rock salt seam hole, end oil reservoir should not be selected, more can not select sandstone oil reservoir;
2, the oil well as far as possible selecting intermittent production and surface gathering and transferring pipeline to perfect, reduces surface construction investment like this, also avoids the normal production affecting oil well.
If 3 oil reservoirs exist certain in debt, optionally select machine-pumped oil well, this to ageing oil re-injection and back production favourable.
Advantage of the present invention adopts method treatment of aged provided by the invention oil, technique is extremely simple, cost is extremely cheap, treatment effect is extremely stable, eliminate the expense of building needed for a set of ageing oil treatment unit simultaneously, achieve significant economic benefit and social benefit, in the limit of mining of carbonatite oil field, have generalization.
Accompanying drawing explanation
When considered in conjunction with the accompanying drawings, by referring to detailed description below, more completely can understand the present invention better and easily learn wherein many adjoint advantages, but accompanying drawing described herein is used to provide a further understanding of the present invention, form a part of the present invention, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention, as schemed wherein:
Fig. 1 is ageing oil treatment system process flow diagram of the present invention.
Below in conjunction with drawings and Examples, the present invention is further described.
Embodiment
Obviously, the many modifications and variations that those skilled in the art do based on aim of the present invention belong to protection scope of the present invention.
Embodiment 1: as shown in Figure 1,
For realizing the object of the invention, the measure taked first ageing oil and 2# emulsion splitter is done constant temperature to dewater contrast experiment:
Table one ageing oil constant temperature dehydration test result
Learnt by above-mentioned test-results, emulsion splitter of no matter whether annotating, ageing oil is dehydrating effect extreme difference before 90 DEG C; After ageing oil filling emulsion splitter, during bath temperature 90 DEG C, dehydration test is obvious, and during bath temperature 100 DEG C, dehydrating effect is better, and prolongation in time and more obvious, under equal conditions, 2# dehydrating effect of emulsion breaker is better than the dehydrating effect not adding emulsion splitter.The stable performance within 160 DEG C of this emulsion splitter.Known according to table one, use the dehydrating effect of 2# emulsion splitter 100 DEG C time best, and prolongation is in time more obvious, therefore after pit shaft injects ageing oil, closing well boils in a covered pot over a slow fire well a couple of days, demulsification can be made better, recycling machine adopts+and water filling by its extraction, thus thoroughly solves a difficult problem for ageing oil breaking emulsion and dewatering for oily exploitation pattern.
In figure, ageing oil withdrawing can 1, high pressure centrifugal pump 2, dosing sled 3, possesses the reinjection well 4 of constant volume hole type reservoir characteristics, oil well pump 5, surface gathering and transferring flow process 6, reinjection well oil jacket annular space 7.
Oil field, northwest belongs to carbonatite oil field, its treatment station is because of defective workmanship, ageing oil cannot be effectively addressed in station, apart from a bite exploitation well at 700m place, this station, well depth 6607.45m, development layer position Ordovician system room group, oil reservoir well depth 6030 meters, corresponding formation temperature 147 degree, belong to typical constant volume hole type reservoir characteristics, the effective reserves volume of this well is greater than 10 × 10
4m
3, adopt electric pump+water filling for oily mining type, batch production, drive a well produce oil about 50t in time, not moisture, and this well adds up extraction oil, water nearly 6 × 10
4t.
Utilize treatment station to the existing water filling flow process of reinjection well 4,432m in standing
3ageing oil is collected into ageing oil withdrawing can 1, by high pressure centrifugal pump 2, injects this reinjection well 4 pit shaft by reinjection well oil jacket annular space 7, utilizes dosing to prize 3 filling 2# emulsion splitter (concentration 50PPM) simultaneously.Reinject 500m after having noted ageing oil
3industrial sewage, to prevent ageing oil on waterflood-transmission line and oil pipe impact, and guarantee that ageing oil is all pressed into oil reservoir (constant volume hole type oil reservoir), more obvious in view of the dehydrating effect prolongation in time of ageing oil, therefore this reinjection well 4 closing well is boiled in a covered pot over a slow fire well 6 days, the output of oil well pump 5 is surface gathering and transferring flow process 6.
After 6 days, this well oil pressure 0mpa, casing pressure 0.1mpa, opens electric pump and drives a well, production fluid: 95.2m
3/ d, twice daily at wellhead sampling, gets 5 days continuously, learns through distilling moisture experiment: production fluid is moisture stable, is 4.21%; Again water bath with thermostatic control dehydration test is done to 5 oil samples, data following (as shown in Table 2).
Table two reinjection well (4) oil sample moisture chemical examination effect table
As shown in Table 2, these oil samples 4 hours dehydrating effects in 60 DEG C of waters bath with thermostatic control are ideal.And the day-to-day operation temperature in station is 60 DEG C, maximum operating temperature is 70 DEG C, and the settling time of crude oil in slurry tank is 24 hours, can meet the dehydration requirement of this well oil product completely, shows to inject the 432m in reinjection well 4
3ageing oil decomposes completely, solves dehydrating aging and a process difficult problem.
When utilizing the inventive method treatment of aged oil, the recovery ratio of the ageing oil of re-injection oil reservoir cannot be adjusted.But consider the dehydration property of emulsion splitter, profit is gravity separation in oil reservoir, and closing well boils in a covered pot over a slow fire well characteristic, adopt water filling intermittent recovery production characteristic in conjunction with constant volume acid carbonate rock, the recovery ratio of ageing oil should more than 90%, and promotion prospect is good and convenient.
A kind of method utilizing the feature treatment of aged oil of carbonatite production characteristic and wellbore formation high temperature; its process comprises the ageing oil after by filling emulsion splitter and is injected in reinjection well carbonate rock fractured cave; utilize this well stratum high-temperature characteristic, by the ageing oil natural decomposition of the impurity such as sludge containing, slag; According to the gap exploitation pattern of this reinjection well water filling for oil, by the ageing oil extraction again after decomposition in seam hole.
Described reinjection well must be the oil well of carbonatite constant volume hole oil reservoir, and effectively reserves volume energy fully holds the aging oil mass that need inject.
Described reinjection well should be machine to be adopted+water filling for oil well, surface gathering and transferring pipeline also must perfect.
The emulsion splitter used ageing oil to scene has good demulsification, and further obvious with the rising of temperature.
Emulsion splitter used demulsification under the reservoir temperature environment of corresponding reinjection well is good, and stable performance.
Ageing oil after filling emulsion splitter is injected pit shaft, well a couple of days must be boiled in a covered pot over a slow fire by closing well, to guarantee that dehydrating aging is thorough, and re-establish oil-water interface.
As mentioned above, embodiments of the invention are explained, but as long as do not depart from inventive point of the present invention in fact and effect can have a lot of distortion, this will be readily apparent to persons skilled in the art.Therefore, such variation is also all included within protection scope of the present invention.
Claims (3)
1. an ageing oil treatment process, is characterized in that containing following steps:
Ageing oil after filling emulsion splitter is injected in reinjection well carbonate rock fractured cave, utilizes this well stratum high-temperature characteristic, by the ageing oil natural decomposition of sludge containing, slag impurity;
According to the gap exploitation pattern of this reinjection well water filling for oil, by the ageing oil extraction again after decomposition in seam hole;
Described emulsion splitter model is 2#, 2# emulsion splitter Ingredient Wt ratio: WD-5:WD-4:WD-1=8:2:2, and wherein WD-5 is polyoxyethylene propylene oxide ether; WD-4 is the rare ether of phenol-amine resin oxyethylene epoxy third; WD-1 is alkyl phenolic resin type oxyethylene propylene oxide ether;
Described reinjection well need meet following 3 conditions: the oil well 1, selecting constant volume acid carbonate petrosal foramen hole oil reservoir; 2, the oil well selecting intermittent production and surface gathering and transferring pipeline to perfect; If 3 oil reservoirs exist certain in debt, select machine-pumped oil well.
2. a kind of ageing oil treatment process according to claim 1, it is characterized in that the ageing oil after filling emulsion splitter injects pit shaft, closing well boils in a covered pot over a slow fire well a couple of days, to guarantee that dehydrating aging is thorough, and re-establishes oil-water interface.
3. a kind of ageing oil treatment process according to claim 1 and 2, its feature, ageing oil is collected into ageing oil withdrawing can, by high pressure centrifugal pump, injects this reinjection well pit shaft, utilizes dosing to prize filling 2# demulsifier concentration 50PPM simultaneously; Reinject 500m after having noted ageing oil
3industrial sewage, and guarantee that ageing oil is all pressed into constant volume hole type oil reservoir, reinjection well closing well boils in a covered pot over a slow fire well 6 days.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2107711C1 (en) * | 1996-08-09 | 1998-03-27 | Рубанов Владимир Ефимович | Composition for dehydrating and desalting crude oil |
| RU2133765C1 (en) * | 1996-03-05 | 1999-07-27 | Шаймарданов Вазих Харисович | Method of dehydrating and desalting of water-oil emulsion |
| RU2225431C1 (en) * | 2002-07-31 | 2004-03-10 | Гильмияров Рафик Раисович | Method of preparing demulsifier for destroying water-oil emulsions capable of suppressing sulfate-reducing bacteria, inhibiting corrosion, asphalt-tarparaffin deposits, and for desulfurization of crude oil |
| CN2677000Y (en) * | 2003-12-11 | 2005-02-09 | 陈国信 | Complete equipment for treating oil field ageing oil |
| CN101942984A (en) * | 2010-01-27 | 2011-01-12 | 中国石油化工股份有限公司 | Fracture-cave type carbonate reservoir waterflooding oil replacement recovery method |
| CN102304384A (en) * | 2011-08-12 | 2012-01-04 | 中国石油天然气股份有限公司 | Biological low-temperature dehydration demulsifier |
-
2013
- 2013-04-03 CN CN201310114350.6A patent/CN104099122B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2133765C1 (en) * | 1996-03-05 | 1999-07-27 | Шаймарданов Вазих Харисович | Method of dehydrating and desalting of water-oil emulsion |
| RU2107711C1 (en) * | 1996-08-09 | 1998-03-27 | Рубанов Владимир Ефимович | Composition for dehydrating and desalting crude oil |
| RU2225431C1 (en) * | 2002-07-31 | 2004-03-10 | Гильмияров Рафик Раисович | Method of preparing demulsifier for destroying water-oil emulsions capable of suppressing sulfate-reducing bacteria, inhibiting corrosion, asphalt-tarparaffin deposits, and for desulfurization of crude oil |
| CN2677000Y (en) * | 2003-12-11 | 2005-02-09 | 陈国信 | Complete equipment for treating oil field ageing oil |
| CN101942984A (en) * | 2010-01-27 | 2011-01-12 | 中国石油化工股份有限公司 | Fracture-cave type carbonate reservoir waterflooding oil replacement recovery method |
| CN102304384A (en) * | 2011-08-12 | 2012-01-04 | 中国石油天然气股份有限公司 | Biological low-temperature dehydration demulsifier |
Non-Patent Citations (2)
| Title |
|---|
| 油田老化油处理工艺研究与应用;胡庆美;《化学工程与装备》;20110831(第8期);第156-159页 * |
| 老化油处理功能工艺探讨;邢黎;《油气田地面工程》;20070228;第26卷(第2期);第56页 * |
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