CN103505912B - 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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- CN103505912B CN103505912B CN201310502594.1A CN201310502594A CN103505912B CN 103505912 B CN103505912 B CN 103505912B CN 201310502594 A CN201310502594 A CN 201310502594A CN 103505912 B CN103505912 B CN 103505912B
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- sump oil
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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 ofly suppress multi-purpose station oil, water hilllock settling tank waste oil recovery 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 particle 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 is formed 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, containing 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 is that sump oil and fresh Produced Liquid blending are entered electric dehydrator process after free water knockout (FWKO) sedimentation mostly.Contain the mechanical admixtures such as ferrous sulfide particle very easily to conduct electricity due to sump oil, it impels water-oil emulsion more stable in oil-water interfaces absorption, emulsified water not easily removes, both can make to increase into electric dehydrator crude oil electrical conductivity, thus cause dehydration current increase even across electric field, cause outer oil transportation moisture content to exceed standard production accident and increase post operation personnel psychology pressure and labour intensity.
Remove ferrous sulfide particle and carbonate in sump oil and often adopt the method such as strong oxidizer and inorganic acid, generally easily realize at laboratory experiment, apply at the scene and be difficult to realize because it exists the harm such as high risk, corrosivity.What on-the-spot application was more is recycle sump oil with sump oil demulsifier, its existing problems are that sump oil demulsifier can lose dehydrating effect when ferrous sulfide in sump oil and impurity content exceed a certain amount of, after de-, moisture content is higher, cannot mix defeated with fresh clean oil, also need very high treatment temperature 70 ~ 80 DEG C simultaneously.In addition, utilize the wetability of demulsifier that the ferrous sulfide in sump oil can be made to depart from from oil-water interfaces and enter oil phase, really improve the dewatering efficiency of demulsifier, but the ferrous sulfide in sump oil is inreal to be removed, have a strong impact on outer output oil quality, bring the harm such as serious corrosivity to downstream oil plant processing process.
Summary of the invention
For the deficiencies in the prior art, the object of the invention is: solve dehydration current when the multi-purpose station system recoveries sump oil existed in background technology causes electric dehydrator to run and increase even across the problem of electric field.
For achieving the above object, the present invention adopts following technical scheme to realize:
A kind of method suppressing multi-purpose station system recoveries sump oil to cause dehydration current to increase, containing a large amount of mechanical admixture in described sump oil, it is characterized in that: be 40 DEG C ~ 70 DEG C in temperature, under sedimentation time 5h ~ 10h condition, in sump oil, add the medicament B that medicament A that concentration is 100mg/L ~ 1000 mg/L and adding consistency are 100mg/L ~ 300mg/L.
A kind of described method suppressing multi-purpose station system recoveries sump oil to cause dehydration current to increase, it is characterized in that: according to mass fraction meter, described medicament A comprises following component:
Organic Lemon acid 10% ~ 20%
Chelating agent 20% ~ 30%
Solvent is water surplus.
A kind of described method suppressing multi-purpose station system recoveries sump oil to cause dehydration current to increase, it is characterized in that: according to mass fraction meter, described medicament B comprises following component:
Agent 30% ~ 40% done by demulsifier
Solvent is dimethylbenzene surplus.
A kind of described method suppressing multi-purpose station system recoveries sump oil to cause dehydration current to increase, 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 suppressing multi-purpose station system recoveries sump oil to cause dehydration current to increase, is characterized in that: described demulsifier is done agent and selected: the expoxy propane ethylene oxide block polyethers demulsifier taking polyethylene polyamine as initiator.
A kind of described method suppressing multi-purpose station system recoveries sump oil to cause dehydration current to increase, is characterized in that: described demulsifier is done agent and selected: demulsifier AE6040.
A kind of method suppressing multi-purpose station system recoveries sump oil to cause dehydration current to increase as above, it is when multi-purpose station system is applied, 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, compared with other processing methods, has the following advantages:
1, the ferrous sulfide in organic monoacid citric acid and sump oil and carbonate reaction, discharge rapidly iron ion and calcium ions and magnesium ions, in formula, chelating agent carries out chelating seizure to the iron ion of release and calcium ions and magnesium ions, thus remove oil-water interfaces and adsorb very easily conductive particle thing destroy rigid interface film, and create favorable conditions for next step removes sump oil body phase internal emulsification water; There is shortening chelating agent and Action of Metal Ions time in organic acid, improve treatment effeciency, 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 falls most of ferrous sulfide and percarbonate particle by adding A kind medicament in front-end processing, enhance demulsifier dewatering efficiency, reduce sump oil moisture content and reduce sump oil electrical conductivity further simultaneously, effective suppression electric dehydrator dehydration current increases and across electric field, by adding A, B two kinds of chemical agents, significantly can reduce the electrical conductivity containing mechanical admixture sump oil, thus the problem that when suppressing waste oil recovery, dehydration current increases, control dehydration current and be less than 50A.
3, the method and background technology are mentioned compared with relevant treatment way;
(1) workable, environmentally friendly, to remove in sump oil the impurity such as ferrous sulfide, promote outer oil transportation quality;
(2) without the need to newly increasing treatment facility, security is high, and corrosivity is low, utilizes existing chemical feeding points can implement adding of agent, remarkable economic and social benefits.
Detailed description of the invention
In order to understand the present invention better, illustrate content of the present invention further below in conjunction with embodiment, 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 DEG C of conditions, add the chemical agent A process 2h of 500mg/L, be warming up to 50 DEG C, add the chemical agent B process 5h of 200mg/L, sump oil moisture content 0.6% after process, electrical conductivity 0.17 μ S/cm, lower than the index 0.43 μ S/cm entering electric dehydrator requirement;
According to mass fraction meter, above-mentioned medicament A comprises following component:
Organic Lemon 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:
Agent AE6040 40% done by demulsifier
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 DEG C of conditions, add the chemical agent A process 2h of 200mg/L, be warming up to 50 DEG C, add the chemical agent B process 5h of 150mg/L, sump oil moisture content 0.4% after process, electrical conductivity 0.23 μ S/cm, lower than the index 0.43 μ S/cm entering electric dehydrator requirement;
According to mass fraction meter, above-mentioned medicament A comprises following component:
Organic Lemon 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:
Agent AE6040 40% done by demulsifier
Solvent is dimethylbenzene surplus.
embodiment 3
Certain field joint stations settling tank oil thick 2.4m, sump oil elevator pump treating capacity 25m
3/ h, free water knockout (FWKO) feed liquor temperature 40 DEG C, electric dehydrator treatment temperature 55 DEG C, sump oil impurity content 3.2%, moisture content 28%; Adopt electric dehydrator when reclaiming continuously before this method to run fluctuation to across electric field, voltage 0-70v, electric current 80-110A, reach 1.0-1.6% across oil transportation moisture content outer during electric field and exceed standard; This method is adopted to add the chemical agent A of 500mg/L at sump oil elevator pump entrance, add the chemical agent B process 10h of 200mg/L in the import of dehydrothermal stove after, 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 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 Lemon 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:
Agent AE6040 40% done by demulsifier
Solvent is dimethylbenzene surplus.
Claims (2)
1. the method suppressing multi-purpose station system recoveries sump oil to cause dehydration current to increase, containing a large amount of mechanical admixture in described sump oil, it is characterized in that: be 40 DEG C ~ 70 DEG C in temperature, under sedimentation time 5h ~ 10h condition, in sump oil, add the medicament B that medicament A that concentration is 100mg/L ~ 1000 mg/L and adding consistency are 100mg/L ~ 300mg/L;
According to mass fraction meter, described medicament A comprises following component:
Organic Lemon acid 10% ~ 20%
Chelating agent 20% ~ 30%
Solvent is water surplus;
According to mass fraction meter, described medicament B comprises following component:
Agent 30% ~ 40% done by demulsifier
Solvent is dimethylbenzene surplus;
Described chelating agent is: the compound of polyamino polyether base methylenephosphonic acid PAPEMP and polyepoxy sodium succinate PESA, and ratio is 6:4;
Described demulsifier is done agent and is selected: the expoxy propane ethylene oxide block polyethers demulsifier taking polyethylene polyamine as initiator.
2. a kind of method suppressing multi-purpose station system recoveries sump oil to cause dehydration current to increase as claimed in claim 1, it is when multi-purpose station system is applied, and medicament A adds in multi-purpose station sump oil elevator pump entrance or free water knockout (FWKO) import; Medicament B adds in dehydrothermal stove inlet line.
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| CN201310502594.1A CN103505912B (en) | 2013-10-23 | 2013-10-23 | Method for inhibiting union station system sump oil recovery resulting in dehydration current increase |
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| CN103505912B true CN103505912B (en) | 2015-04-15 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104818689B (en) * | 2015-05-06 | 2016-10-05 | 李高翔 | Gear drive current energy dissipating, generating, sand-catching apparatus |
| CN105002515B (en) * | 2015-06-01 | 2018-04-20 | 东北石油大学 | Multi-purpose station electric dehydrator pole plate chemical cleaning method |
| 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 |
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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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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 |
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