CN106430740A - Process suitable for treating polymer flooding injection allocation pipeline flushing waste liquid in oil fields - Google Patents
Process suitable for treating polymer flooding injection allocation pipeline flushing waste liquid in oil fields Download PDFInfo
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- CN106430740A CN106430740A CN201611121784.9A CN201611121784A CN106430740A CN 106430740 A CN106430740 A CN 106430740A CN 201611121784 A CN201611121784 A CN 201611121784A CN 106430740 A CN106430740 A CN 106430740A
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- Prior art keywords
- waste liquid
- viscosity
- tank
- injection allocation
- flushing waste
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Mechanical Engineering (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention relates to a process suitable for treating polymer flooding injection allocation pipeline flushing waste liquid in oil fields, which mainly solves the current problem that the quality of treated flushing waste liquid cannot meet the total incoming water quality requirement of a sewage treatment station. The process includes the following steps: (1) waste liquid in a waste liquid storage tank is pumped into an electrolysis unit connected to a dosing tank; (2) the dosing tank is loaded with saline solution or oxidizing viscosity reducer, and a dosing pump is utilized to supply the saline solution into the electrolysis unit, so that oxidizing viscosity reducer is produced; (3) the oxidizing viscosity reducer and the flushing waste liquid in the waste liquid storage tank are mixed in a mixing reaction tank to reduce viscosity; (4) after the viscosity-reduced waste liquid undergoes separation, oil and impurities in the waste liquid are separated out, and then get into an external water supply tank. While increasing the efficiency of reducing the viscosity of high-viscosity flushing waste liquid, the process increases the efficiency of separating impurities in the waste liquid, so that the quality of the treated waste liquid can reach the quality of total incoming water of the sewage treatment station.
Description
Technical field
The present invention relates to oilfield surface engineering produced water treatment technical field, drive injection allocation is gathered in more particularly, to a kind of suitable oil field
The handling process of pipe flushing waste liquid.
Background technology
In order to improve oil recovery factor further, oil field employs polymer displacement of reservoir oil tech, the surface technology of injection distribution system
After equipment longtime running, particularly viscous damage has considerable influence to polymer for the internal easily attached microbial of injection allocation pipeline, jelly.For
Solve this problem and the measure of rinsing individual well pipeline, preparation station to injection station between mother solution pipeline is usually taken, have preferably
Reduce the glutinous effect damaged.But because injection distribution system pipe flushing waste liquid has, suspended solids content is high, bacterial content is high, sewage
The high characteristic of viscosity, is directly entered built Sewage Disposal and is processed, and the normal process running of Sewage Disposal can be caused to set
Apply and cannot adapt to, thus directly influencing water quality reaching standard after the final process of Sewage Disposal, i.e. oil content≤500mg/L, outstanding
Floating solid≤300mg/L.
Content of the invention
The invention reside in water quality cannot after overcoming existing injection distribution system pipe flushing liquid waste processing present in background technology
Reach the problem that the water quality index of the total water of Sewage Disposal requires, and provide a kind of suitable oil field to gather drive injection allocation pipe flushing and give up
The handling process of liquid, this technique improves the separation effect of impurity in waste liquid while improving the viscosity reduction efficiency of high viscosity flushing waste
Rate so as to process after water quality reach the total water of Sewage Disposal water quality it is ensured that the normal operation of Sewage Disposal and process after
Water quality reaching standard.
The present invention solves its problem and can reach by following technical solution：Drive injection allocation pipe flushing is gathered in a kind of suitable oil field
The handling process of waste liquid, comprises the following steps：
（1）, waste liquid in waste liquid storage tank is pumped into electrolysis unit by dosing pump, electrolysis unit connects grug feeding jar；
（2）, described step（1）Grug feeding jar configuration saline solution or oxidative thinner, send saline solution into step by dosing pump
（1）Middle electrolysis unit carries out electrolysis and produces oxidative thinner；
（3）, by step（2）The oxidative thinner producing is being mixed instead with high viscosity injection distribution system flushing waste in waste liquid storage tank
Answer and in tank, be sufficiently mixed viscosity reduction；Or grug feeding jar directly sends finished product oxidative thinner into hybrid reaction tank and high viscosity injection allocation system
System flushing waste carries out reaction and carries out mixing viscosity reduction；
（4）By step（3）Waste liquid after viscosity reduction, after centrifugal device or settlement separation tank, isolate oil in waste liquid and
Impurity is subsequently into outer water delivery case；Enter sewage disposal system after well lifting to be reprocessed.
Described step（1）Waste liquid storage tank is mother solution exhausted bath box and/or individual well exhausted bath box, is connected with high viscous in mother solution exhausted bath box
Degree flushing waste, is connected with high salinity waste liquid in individual well exhausted bath box；Described step（1）It is provided with stirring paddle in hybrid reaction tank.
In electrolysis unit in this technique, by introducing high salinity waste liquid or saline, through electrolysis generation, there is oxygen
The hypochlorous acid of the property changed, is conducive to subsequent treatment to the high-viscosity effect playing thinner containing poly- flushing waste；In hybrid reaction
After in tank, high viscous waste liquid is mixed with thinner, viscosity declines.Waste liquid after viscosity reduction, through centrifugal device or settlement separation tank, divides
Separate out the oil in waste liquid and impurity, finally enter outer water delivery case outer defeated through pump lifting.It is useless that this handling process improves high viscosity flushing
The viscosity reduction efficiency of liquid, also improves the separation efficiency of impurity in waste liquid simultaneously, so that the flushing waste of high viscosity high impurity content is processed
The water quality index that water outlet afterwards reaches polymer-flooding sewage station processed water requires, and reduces and arranges, outside flushing waste, the dirt that environment is caused
Dye.
The present invention can have the advantages that compared with above-mentioned background technology：Drive injection allocation pipeline punching is gathered in this suitable oil field
Wash the handling process of waste liquid, its electrolysis unit passes through to introduce high salinity waste liquid or saline, through electrolysis generation, there is oxidation
The hypochlorous acid of property, serves the effect of thinner；After in hybrid reaction tank, high viscous waste liquid is mixed with thinner, viscosity declines.
Waste liquid after viscosity reduction, after centrifugal device or settlement separation tank, isolates oil in waste liquid and impurity subsequently into outer water delivery
Case.This technique produces oxidant viscosity reduction by using waste liquid, improves the viscosity reduction of high viscosity flushing waste in hybrid reaction tank
Efficiency, the separation efficiency of impurity is high, makes the water outlet after process reach polymer-flooding sewage station water index request, reduces outside flushing waste
Row's pollution on the environment, improves oil field and gathers drive implantation quality, ensure oil field Sustainable Exploitation, improve oilfield economic benefit
One important channel.
Specific embodiment：
Below in conjunction with specific embodiment, the invention will be further described：
Embodiment 1
Oil field is gathered and is driven the waste liquid that injection allocation pipe flushing produces and be directly entered mother solution exhausted bath box and individual well exhausted bath box enters row buffering, high ore deposit
Change degree（Salinity >=5000mg/L）The individual well pipe flushing waste liquid of low viscosity (viscosity≤1mp.s) passes through dosing pump from exhausted bath box
Enter electrolysis unit, electrolytic pole board spacing 18mm, formed through 40min electrolysis and contain the hypochlorous electrolyte of saturation, electrolyte
It is sufficiently mixed viscosity reduction with the waste liquid in high viscosity (viscosity ＞ 2mp.s) mother solution pipe flushing exhausted bath box in hybrid reaction tank, mix
Close retort time of staying 30min, be provided with stirring paddle in hybrid reaction tank, be conducive to oxidant fully anti-with high viscosity waste liquid
Should, until the waste liquid (viscosity≤2mp.s) after viscosity reduction enters centrifugal device and carries out impurity separation, after process, liquid enters outer water delivery
Case, is entered sewage disposal system and is reprocessed after being lifted by elevator pump.
Embodiment 2
Oil field is gathered and is driven the high viscosity mother solution pipe flushing waste liquid that injection allocation pipe flushing produces and be directly entered exhausted bath box and enter row buffering, leads to
Cross grug feeding jar and inject saturated salt solution in electrolysis unit and be electrolysed, NaCl concentration scope 20%, electrolytic pole board spacing 18mm,
Formed through 40min electrolysis and contain hypochlorous electrolyte, electrolyte is given up with high viscosity (viscosity ＞ 2mp.s) mother solution pipe flushing
Liquid is sufficiently mixed viscosity reduction, hybrid reaction tank time of staying 30min in hybrid reaction tank.Waste liquid after viscosity reduction (viscosity≤
2mp.s) enter centrifugal device and carry out impurity separation, after process, liquid enters outer water delivery case, after lifting, enter sewage disposal system
Reprocessed.
Embodiment 3
High viscosity (viscosity ＞ 2mp.s) the mother solution pipe flushing waste liquid that drive injection allocation pipe flushing generation is gathered in oil field is directly entered waste liquid
Case enters row buffering, adds sodium hypochlorite medicament, chemical feeding quantity ＞ 2%, sodium hypochlorite medicament and high viscosity mother solution pipeline by grug feeding jar
Flushing waste carries out being sufficiently mixed reaction, hybrid reaction tank time of staying 60min in hybrid reaction tank.Waste liquid after viscosity reduction
(viscosity≤2mp.s) enters centrifugal device and carries out impurity separation, and after process, liquid enters outer water delivery case, enters at sewage after lifting
Reason system is reprocessed.
Embodiment 4
Oil field is gathered and is driven the individual well pipe flushing waste liquid that injection allocation pipe flushing produces and be directly entered exhausted bath box and enter row buffering, by lifting
Pump enters centrifugal device or settling tank carries out impurity and separates.Centrifugation factor 9600, rotating speed 8500 r/min, solid to improve
Body impurity removal efficacy, the less gravity disc of optional diameter is configured, and the sedimentation time is 8h, after process liquid enter outer
Water delivery case, enters sewage disposal system and is reprocessed after lifting.
The poly- drive to oil recovery factory of Daqing Oil Field Co., Ltd the 6th, the 4th oil recovery factory and the 5th oil recovery factory for this covering device
Pipe flushing waste liquid is processed, and water outlet after process reaches polymer-flooding sewage station water index request and is oil content≤500mg/L, hangs
Floating solid≤300mg/L.Water quality reaching standard after guaranteeing the normal operation of Sewage Disposal and processing.
Claims (5)
1. a kind of suitable oil field gather drive injection allocation pipe flushing waste liquid handling process it is characterised in that：Comprise the following steps：
（1）, waste liquid in waste liquid storage tank is pumped into electrolysis unit by dosing pump, electrolysis unit connects grug feeding jar；
（2）, described step（1）Grug feeding jar configuration saline solution or oxidative thinner, send saline solution into step by dosing pump
（1）Middle electrolysis unit carries out electrolysis and produces oxidative thinner；
（3）, by step（2）The oxidative thinner producing is being mixed instead with high viscosity injection distribution system flushing waste in waste liquid storage tank
Answer and in tank, be sufficiently mixed viscosity reduction；Or grug feeding jar directly sends finished product oxidative thinner into hybrid reaction tank and high viscosity injection allocation system
System flushing waste carries out reaction and carries out mixing viscosity reduction；
（4）, by step（3）Waste liquid after viscosity reduction, after centrifugal device or settlement separation tank, isolate oil in waste liquid and
Impurity is subsequently into outer water delivery case；Enter sewage disposal system after well lifting to be reprocessed.
2. the handling process driving injection allocation pipe flushing waste liquid is gathered in a kind of suitable oil field according to claim 1, and its feature exists
In：Described step（1）Waste liquid storage tank is mother solution exhausted bath box and/or individual well exhausted bath box；It is connected with high viscosity punching in mother solution exhausted bath box
Wash waste liquid, in individual well exhausted bath box, be connected with high salinity waste liquid.
3. the handling process driving injection allocation pipe flushing waste liquid is gathered in a kind of suitable oil field according to claim 1, and its feature exists
In：Described step（1）It is provided with stirring paddle in hybrid reaction tank.
4. the handling process driving injection allocation pipe flushing waste liquid is gathered in a kind of suitable oil field according to claim 1, and its feature exists
In：Described step（2）Concentration of salt solution is 18%-30%.
5. the handling process driving injection allocation pipe flushing waste liquid is gathered in a kind of suitable oil field according to claim 1, and its feature exists
In：Described electrolysis unit electrolytic pole board spacing 18mm, electrolysis time 40min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611121784.9A CN106430740A (en) | 2016-12-08 | 2016-12-08 | Process suitable for treating polymer flooding injection allocation pipeline flushing waste liquid in oil fields |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611121784.9A CN106430740A (en) | 2016-12-08 | 2016-12-08 | Process suitable for treating polymer flooding injection allocation pipeline flushing waste liquid in oil fields |
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| CN106430740A true CN106430740A (en) | 2017-02-22 |
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| CN201611121784.9A Pending CN106430740A (en) | 2016-12-08 | 2016-12-08 | Process suitable for treating polymer flooding injection allocation pipeline flushing waste liquid in oil fields |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107021584A (en) * | 2017-05-17 | 2017-08-08 | 天津寰宜环保科技有限公司 | Circulating type electrochemical gel breaking device and method for oilfield fracturing wastewater |
| CN113233659A (en) * | 2021-04-28 | 2021-08-10 | 李晟贤 | Method for recovering filtering speed of filter material |
Citations (5)
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| CN1931736A (en) * | 2006-09-25 | 2007-03-21 | 哈尔滨工业大学 | Degrading and viscosity reducing process for sewage containing oil and polymer |
| CN102259970A (en) * | 2011-03-08 | 2011-11-30 | 广州金川环保设备有限公司 | Method and device for pretreating oil field sewage by combining ultrasonic wave oxidation and electrochemical oxidation |
| CN103043833A (en) * | 2012-12-19 | 2013-04-17 | 中国海洋石油总公司 | Electrochemical method for treating polymer-contained sewage of oilfield |
| CN104478020A (en) * | 2014-12-09 | 2015-04-01 | 王宝辉 | High-efficiency gel and emulsion breaking, desulfurizing and sterilizing agent for oilfield fracturing flow-back fluid |
| CN105967401A (en) * | 2016-06-08 | 2016-09-28 | 中国石油天然气股份有限公司 | Method for treating oil field measure shaft backflow liquid to prepare rilling fluid |
-
2016
- 2016-12-08 CN CN201611121784.9A patent/CN106430740A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1931736A (en) * | 2006-09-25 | 2007-03-21 | 哈尔滨工业大学 | Degrading and viscosity reducing process for sewage containing oil and polymer |
| CN102259970A (en) * | 2011-03-08 | 2011-11-30 | 广州金川环保设备有限公司 | Method and device for pretreating oil field sewage by combining ultrasonic wave oxidation and electrochemical oxidation |
| CN103043833A (en) * | 2012-12-19 | 2013-04-17 | 中国海洋石油总公司 | Electrochemical method for treating polymer-contained sewage of oilfield |
| CN104478020A (en) * | 2014-12-09 | 2015-04-01 | 王宝辉 | High-efficiency gel and emulsion breaking, desulfurizing and sterilizing agent for oilfield fracturing flow-back fluid |
| CN105967401A (en) * | 2016-06-08 | 2016-09-28 | 中国石油天然气股份有限公司 | Method for treating oil field measure shaft backflow liquid to prepare rilling fluid |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107021584A (en) * | 2017-05-17 | 2017-08-08 | 天津寰宜环保科技有限公司 | Circulating type electrochemical gel breaking device and method for oilfield fracturing wastewater |
| CN113233659A (en) * | 2021-04-28 | 2021-08-10 | 李晟贤 | Method for recovering filtering speed of filter material |
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Application publication date: 20170222 |
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