CN103505912A - Method for inhibiting union station system sump oil recovery resulting in dehydration current increase - Google Patents
Method for inhibiting union station system sump oil recovery resulting in dehydration current increase Download PDFInfo
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- CN103505912A CN103505912A CN201310502594.1A CN201310502594A CN103505912A CN 103505912 A CN103505912 A CN 103505912A CN 201310502594 A CN201310502594 A CN 201310502594A CN 103505912 A CN103505912 A CN 103505912A
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Abstract
The invention discloses a method for inhibiting union station system sump oil recovery resulting in dehydration current increase. Sump oil contains a large amount of mechanical impurities, under the condition that the temperature is 40-70 DEG C, and the sedimentation time is 5-10 h, a medicament A with the concentration of 100-1000mg/l and a medicament B with the concentration of 100-300mg/l are added into the sump oil; by adding two chemical agents, the conductivity of the sump oil containing mechanical impurities can be reduced remarkably, the problem that dehydration current is increased during sump oil recovery is inhibited, and the dehydration current is controlled to be less than 50 A.
Description
technical field
The present invention relates to a kind of field joint stations system recoveries sump oil processing method, especially a kind of multi-purpose station You,Shui hilllock settling tank waste oil recovery that suppresses causes electric dehydrator dehydration current to raise or across the method for electric field.
background technology:
At present, the sump oil of a large amount of black solid particles is all contained on each considerable part multi-purpose station system electric dehydrator intermediate layer, oil field, sewage precipitation tank and emergency storage tank top and recovery upper strata, pond, the reason that sump oil forms mainly contains two aspects: on the one hand, in system, sulfate reducing bacteria excessive multiplication generates hydrogen sulfide, and corrosion pit shaft and ground installation form ferrous sulfide; On the other hand, chemical flooding tertiary oil recovery well stimulation comprises the measures such as oil well acidation pressure break, pickling, it returns discharge opeing, and to enter multi-purpose station system silt carrying capacity large, contains a large amount of carbonate and ferrous sulfide and other inorganic suspended particles impact system, has a strong impact on water-oil separating and form sump oil.Present stage, each oilfield sump oil recycling mode was that sump oil and fresh Produced Liquid blending are entered to electric dehydrator processing after free water knockout (FWKO) sedimentation mostly.Due to sump oil, containing the mechanical admixtures such as ferrous sulfide particle very easily conducts electricity, it impels water-oil emulsion more stable in oil-water interfaces absorption, emulsified water is difficult for removing, both can make to increase into electric dehydrator crude oil electrical conductivity, thereby cause dehydration current increase even across electric field, cause the exceed standard production accident and increase post operation personnel psychology pressure and labour intensity of outer oil transportation moisture content.
In removal sump oil, ferrous sulfide particle and carbonate often adopt the methods such as strong oxidizer and inorganic acid, generally at laboratory experiment, easily realize, and apply at the scene and because of it, exist the harm such as high risk, corrosivity to be difficult to realize.What on-the-spot application was more is to recycle sump oil with sump oil demulsifier, its existing problems are that ferrous sulfide and impurity content surpass sump oil demulsifier when a certain amount of and can lose dehydrating effect in sump oil, after de-, moisture content is higher, cannot mix defeatedly with fresh clean oil, also need 70～80 ℃ of very high treatment temperatures simultaneously.In addition, utilize the wetability of demulsifier can make the ferrous sulfide in sump oil depart from and enter oil phase from oil-water interfaces, really improved the dewatering efficiency of demulsifier, but the ferrous sulfide in sump oil is real removal not, have a strong impact on the oil plant processing processing of outer output oil quality ，Gei downstream and brought the serious harm such as corrosivity.
Summary of the invention
For the deficiencies in the prior art, the object of the invention is: when solving the multi-purpose station system recoveries sump oil existing in background technology and causing electric dehydrator operation, dehydration current increases even the problem across electric field.
For achieving the above object, the present invention adopts following technical scheme to realize:
A kind ofly suppress the method that multi-purpose station system recoveries sump oil causes dehydration current to increase, in described sump oil, contain a large amount of mechanical admixtures, it is characterized in that: under temperature is 40 ℃～70 ℃, sedimentation time 5h～10h condition, to adding the medicament B that medicament A that concentration is 100mg/L～1000 mg/L and adding consistency are 100mg/L～300mg/L in sump oil.
A kind of described method that multi-purpose station system recoveries sump oil causes dehydration current to increase that suppresses, is characterized in that: according to mass fraction meter, described medicament A comprises following component:
Organic citric acid 10%～20%
Chelating agent 20%～30%
Solvent is water surplus.
A kind of described method that multi-purpose station system recoveries sump oil causes dehydration current to increase that suppresses, is characterized in that: according to mass fraction meter, described medicament B comprises following component:
Demulsifier is done agent 30%～40%
Solvent is dimethylbenzene surplus.
A kind of described method that multi-purpose station system recoveries sump oil causes dehydration current to increase that suppresses, is characterized in that: described chelating agent comprises: the compound proportion of polyamino polyether base methylenephosphonic acid PAPEMP and polyepoxy sodium succinate PESA is 6:4.
A kind of described method that multi-purpose station system recoveries sump oil causes dehydration current to increase that suppresses, is characterized in that: the dry agent of described demulsifier is selected: the expoxy propane ethylene oxide block polyethers demulsifier that the polyethylene polyamine of take is initiator.
A kind of described method that multi-purpose station system recoveries sump oil causes dehydration current to increase that suppresses, is characterized in that: the dry agent of described demulsifier is selected: demulsifier AE6040.
A kind of method that multi-purpose station system recoveries sump oil causes dehydration current to increase that suppresses as above, it is when multi-purpose station system applies, and A kind chemical agent can add in multi-purpose station sump oil elevator pump entrance or free water knockout (FWKO) import; B kind chemical agent adds in dehydrothermal stove inlet line (electric dehydrator import).
The present invention compares with other processing methods, has the following advantages:
1, ferrous sulfide and the carbonate reaction in organic monoacid citric acid and sump oil, discharge rapidly iron ion and calcium ions and magnesium ions, in formula, chelating agent carries out chelating seizure to the iron ion and the calcium ions and magnesium ions that discharge, thereby remove oil-water interfaces, adsorb very easily conductive particle thing and destroy rigid interface film, and creating favorable conditions for next step removes sump oil body phase internal emulsification water; Organic acid exists and shortens chelating agent and Action of Metal Ions time, improves treatment effeciency, and itself has good chelation to iron ion.
2, facts have proved, when in sump oil, ferrous sulfide granule content reaches certain numerical value, oil-soluble demulsifier will lose dehydrating effect.This method is fallen most of ferrous sulfide and carbonate particulate by adding A kind medicament in front-end processing, strengthened demulsifier dewatering efficiency, reduce sump oil moisture content and further reduce sump oil electrical conductivity simultaneously, effectively suppress that electric dehydrator dehydration current increases and across electric field, by adding A, two kinds of chemical agents of B, can significantly reduce the electrical conductivity containing mechanical admixture sump oil, thereby the problem that while suppressing waste oil recovery, dehydration current increases is controlled dehydration current and is less than 50A.
3, the method and background technology mention that relevant treatment way compares;
(1) workable, environmentally friendly, remove the impurity such as the interior ferrous sulfide of sump oil, promote outer oil transportation quality;
(2) without newly increasing treatment facility, safe, corrosivity is low, utilizes existing chemical feeding points can implement adding of agent, remarkable economic and social benefits.
The specific embodiment
In order to understand better the present invention, below in conjunction with embodiment, further illustrate content of the present invention, but content of the present invention is not only confined to the following examples.
embodiment 1
Get certain field joint stations oil hilllock settling tank sump oil, analyzing total iron content is 71.6mg/kg, sulfide content 51.4 mg/kg, moisture content 25%, testing conductivity 3900 μ S/cm; Under 40 ℃ of conditions, the chemical agent A that adds 500mg/L processes 2h, is warming up to 50 ℃, and the chemical agent B that adds 200mg/L processes 5h, sump oil moisture content 0.6% after processing, and electrical conductivity 0.17 μ S/cm, lower than the index 0.43 μ S/cm that enters electric dehydrator requirement;
According to mass fraction meter, above-mentioned medicament A comprises following component:
Organic citric acid 20%
Chelating agent 20%
Solvent is water surplus.
Described chelating agent is polyamino polyether base methylenephosphonic acid PAPEMP and polyepoxy sodium succinate PESA compound, and its compound proportion is 6:4.
According to mass fraction meter, described medicament B comprises following component:
Demulsifier is done agent AE6040 40%
Solvent is dimethylbenzene surplus.
embodiment 2
Get certain field joint stations oil hilllock settling tank sump oil, analyzing total iron content is 34.5 mg/kg, sulfide content 27.3mg/kg, moisture content 18%, testing conductivity 1700 μ S/cm; Under 40 ℃ of conditions, the chemical agent A that adds 200mg/L processes 2h, is warming up to 50 ℃, and the chemical agent B that adds 150mg/L processes 5h, sump oil moisture content 0.4% after processing, and electrical conductivity 0.23 μ S/cm, lower than the index 0.43 μ S/cm that enters electric dehydrator requirement;
According to mass fraction meter, above-mentioned medicament A comprises following component:
Organic citric acid 10%
Chelating agent 20%
Solvent is water surplus.
Described chelating agent is polyamino polyether base methylenephosphonic acid PAPEMP and polyepoxy sodium succinate PESA compound, and its compound proportion is 6:4.
According to mass fraction meter, described medicament B comprises following component:
Demulsifier is done agent AE6040 40%
Solvent is dimethylbenzene surplus.
embodiment 3
The thick 2.4m of certain field joint stations settling tank oil, sump oil elevator pump treating capacity 25m
3/ h, 40 ℃ of free water knockout (FWKO) feed liquor temperature, 55 ℃ of electric dehydrator treatment temperatures, sump oil impurity content 3.2%, moisture content 28%; Adopt while reclaiming continuously before this method electric dehydrator operation fluctuation to across electric field, voltage 0-70v, electric current 80-110A, during across electric field, outer oil transportation moisture content reaches 1.0-1.6% and exceeds standard; Adopt this method at sump oil elevator pump entrance, to add the chemical agent A of 500mg/L, the chemical agent B that adds 200mg/L in the import of dehydrothermal stove processes after 10h, dehydration voltage rises gradually, in 2 days, voltage rises to 348V from 120V, dehydration current drops to 20A from 100A, outer oil transportation moisture content is up to standard 0.3%, reclaims 6 day time, and settling tank oil is thick is down to 0.20m from 2.4m.
According to mass fraction meter, above-mentioned medicament A comprises following component:
Organic citric acid 20%
Chelating agent 30%
Solvent is water surplus.
Described chelating agent is polyamino polyether base methylenephosphonic acid PAPEMP and polyepoxy sodium succinate PESA compound, and its compound proportion is 6:4.
According to mass fraction meter, described medicament B comprises following component:
Demulsifier is done agent AE6040 40%
Solvent is dimethylbenzene surplus.
Claims (7)
1. one kind is suppressed the method that multi-purpose station system recoveries sump oil causes dehydration current to increase, in described sump oil, contain a large amount of mechanical admixtures, it is characterized in that: under temperature is 40 ℃～70 ℃, sedimentation time 5h～10h condition, to adding the medicament B that medicament A that concentration is 100mg/L～1000mg/L and adding consistency are 100mg/L～300mg/L in sump oil.
2. a kind of method that multi-purpose station system recoveries sump oil causes dehydration current to increase that suppresses according to claim 1, is characterized in that: according to mass fraction meter, described medicament A comprises following component:
Organic citric acid 10%～20%
Chelating agent 20%～30%
Solvent is water surplus.
3. a kind of method that multi-purpose station system recoveries sump oil causes dehydration current to increase that suppresses according to claim 1, is characterized in that: according to mass fraction meter, described medicament B comprises following component:
Demulsifier is done agent 30%～40%
Solvent is dimethylbenzene surplus.
4. a kind of method that multi-purpose station system recoveries sump oil causes dehydration current to increase that suppresses according to claim 2, is characterized in that: described chelating agent comprises: the compound proportion of polyamino polyether base methylenephosphonic acid PAPEMP and polyepoxy sodium succinate PESA is 6:4.
5. a kind of method that multi-purpose station system recoveries sump oil causes dehydration current to increase that suppresses according to claim 3, is characterized in that: the dry agent of described demulsifier is selected: the expoxy propane ethylene oxide block polyethers demulsifier that the polyethylene polyamine of take is initiator.
6. a kind of method that multi-purpose station system recoveries sump oil causes dehydration current to increase that suppresses according to claim 3, is characterized in that: the dry agent of described demulsifier is selected: demulsifier AE6040.
7. a kind of as described in the claims suppresses the method that multi-purpose station system recoveries sump oil causes dehydration current to increase, and it is when multi-purpose station system applies, and A kind chemical agent can add in multi-purpose station sump oil elevator pump entrance or free water knockout (FWKO) import; B kind chemical agent adds in dehydrothermal stove inlet line (electric dehydrator import).
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105002515A (en) * | 2015-06-01 | 2015-10-28 | 东北石油大学 | Chemical cleaning method for electric dehydrator electrode plate of combination station |
| CN105152234A (en) * | 2015-07-10 | 2015-12-16 | 东北石油大学 | Method for eliminating combination station system discharge water quality deterioration caused by oil well acid washing flowback fluid |
| CN106286097A (en) * | 2015-05-06 | 2017-01-04 | 苏州汇诚智造工业设计有限公司 | Gear drive current energy dissipating, generating, sand-catching apparatus |
| CN107099325A (en) * | 2016-02-22 | 2017-08-29 | 中国石油化工股份有限公司 | A kind of method of sump oil desalting and dewatering |
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| WO2009113095A2 (en) * | 2008-01-24 | 2009-09-17 | Dorf Ketal Chemicals (I) Private Limited | Method of removing metals from hydrocarbon feedstock using esters of carboxylic acids |
| CN103146417A (en) * | 2011-12-07 | 2013-06-12 | 中国石油化工股份有限公司 | Composite demetalization agent and preparation method thereof |
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| CN101085932A (en) * | 2006-06-05 | 2007-12-12 | 广州市精至化工有限公司 | Composite metal remover used for hydrocarbon oil and method for removing metal |
| WO2009113095A2 (en) * | 2008-01-24 | 2009-09-17 | Dorf Ketal Chemicals (I) Private Limited | Method of removing metals from hydrocarbon feedstock using esters of carboxylic acids |
| WO2009113095A3 (en) * | 2008-01-24 | 2009-11-26 | Dorf Ketal Chemicals (I) Private Limited | Method of removing metals from hydrocarbon feedstock using esters of carboxylic acids |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286097A (en) * | 2015-05-06 | 2017-01-04 | 苏州汇诚智造工业设计有限公司 | Gear drive current energy dissipating, generating, sand-catching apparatus |
| CN105002515A (en) * | 2015-06-01 | 2015-10-28 | 东北石油大学 | Chemical cleaning method for electric dehydrator electrode plate of combination station |
| CN105002515B (en) * | 2015-06-01 | 2018-04-20 | 东北石油大学 | Multi-purpose station electric dehydrator pole plate chemical cleaning method |
| CN105152234A (en) * | 2015-07-10 | 2015-12-16 | 东北石油大学 | Method for eliminating combination station system discharge water quality deterioration caused by oil well acid washing flowback fluid |
| CN105152234B (en) * | 2015-07-10 | 2017-11-10 | 东北石油大学 | Eliminating oil well pickling and returning discharge opeing causes multi-purpose station system to discharge water the method for water quality deterioration |
| CN107099325A (en) * | 2016-02-22 | 2017-08-29 | 中国石油化工股份有限公司 | A kind of method of sump oil desalting and dewatering |
| CN107099325B (en) * | 2016-02-22 | 2019-06-14 | 中国石油化工股份有限公司 | A kind of method of sump oil desalting and dewatering |
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Effective date of registration: 20200409 Address after: Room 2 uff03 110, emerging industry incubator (Park), No. 105, Keji Road, high tech Zone, Daqing City, Heilongjiang Province Patentee after: DAQING YILAI INSPECTION AND DETECTING TECHNOLOGY SERVICE Co.,Ltd. Address before: 163000 No. 199, development road, hi tech Development Zone, Heilongjiang, Daqing Patentee before: NORTHEAST PETROLEUM University |