CN104692555B - Method and device for recycling fracturing flow-back fluid - Google Patents
Method and device for recycling fracturing flow-back fluid Download PDFInfo
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- CN104692555B CN104692555B CN201310655236.4A CN201310655236A CN104692555B CN 104692555 B CN104692555 B CN 104692555B CN 201310655236 A CN201310655236 A CN 201310655236A CN 104692555 B CN104692555 B CN 104692555B
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Abstract
A method and a device for recycling fracturing flow-back fluid belong to the technical field of fracturing fluid recycling. Step a, performing gas-liquid separation on the fracturing flow-back fluid through a gas-liquid separation device; b, enabling the liquid to enter a sand setting and oil removing tank for removing sand and condensate oil; c, pumping the liquid in the condensate oil removing tank into an ion removing tank through a pump to remove metal ions; d, filtering the treated liquid through a filter tank to further remove precipitates; and e, enabling the filtered liquid to enter a special fracturing flow-back liquid storage tank, sampling from the tank for full-ion analysis, and supplementing missing additives so that the fracturing flow-back liquid can meet the construction requirements of fracturing liquid.
Description
Technical field
The present invention relates to a kind of fracturing outlet liquid recycling reuse method and device, belong to pressure
Split liquid recycle utilization field.
Background technology
In oilfield exploitation procedure, fracturing work is the most frequently used a kind of Means To Increase Production, especially
At hypotonic oil gas field.After fracturing work terminates, major part fracturing fluid will return from stratum and eject.
These return in discharge opeing containing substantial amounts of remaining fracturing fluid additive, stratum ion, clay particle and landwaste
And part proppant, condensate etc., return to discharge into and soil and water resource will be caused sternly into ecosystem
Heavily contaminated, and the cost carrying out innoxious direct process (making its water quality reach discharge standard) is high, skill
Art difficulty is big.At present, each oil gas field mainly use leave concentratedly, the method for reinjection into reservoir after pretreatment
Process fracturing work generation returns discharge opeing in a large number, and its processing cost is higher, and there is pollution formation water
Risk.If the discharge opeing of returning after fracturing work can be carried out recycling recycling, by physics, change
Process makes to return discharge opeing and again reaches the performance requirement needed for fracturing work, makees for pressure break next time
Industry, had both saved dosing water and construction material, reduced again fracturing outlet liquid harmless treatment amount,
Play a role in energy conservation.
In existing fracturing fluid recovery (backflow) processing system, there are employing natural subsidence, then electrochemical treatments
Rear re-injection, also there are the methods such as employing coagulation, electrolysis, microorganism to process sewage and reach discharge standard.
On the whole, mainly using natural subsidence, then electrochemical treatments or coagulating treatment, make suspension
Re-injection or arrange outward after thing sedimentation.Or after being directly over natural subsidence, supplement fracturing fluid additive and use
In end opening well fracturing work.Patent No. ZL200610010499.X provides a kind of fracturing outlet liquid
Recovery processing technique, uses and first will return discharge opeing and break glue, then carries out flocculating, oxidation processes, then carries out
Secondary flocculation, secondary oxidative treatments, and so forth, until the fracturing outlet liquid after Chu Liing reaches country
Secondary discharge standard or reinjected water water quality requirement.This be a class relatively common return discharge opeing processing method,
The chemical requirement (being called for short COD) returning in discharge opeing can be made to reach national regulation sewage drainage standard.
Patent No. ZL201220050049.4 provides a kind of natural gas well and returns discharge fracturing fluid recycling
System, is separated the liquid of the row of returning with natural gas by gas-liquid separator, is then passed through twice sedimentation,
For fracturing work again after the measures such as supplemented by additives.At present, conventional fracturing outlet liquid processes system
System predominantly following two big classes, one be by electrochemistry, flocculate, the method such as oxidation so that fracturing fluid
Return all flocculation, the oxidation processes such as all polymer substances in discharge opeing, remaining additive to fall, become
Meeting the clear water of industrial discharge standard, water quality reaches outer row's requirement, wastes and returns the repeatable utilization of discharge opeing
Various remaining additives, processing cost is high, long processing period；Two is to be passed through by fracturing fluid recovery (backflow) liquid
After simple sedimentation is except mechanical admixture, supplements and adsorbed by stratum or the damnous interpolation of reason such as degraded
Agent so that it is meet again the performance requirement of pressing crack construction, thus realize recycling, processing method
Simply, but only for without or fracturing fluid containing a small amount of condensate and formation water reclaim, and can only
That reclaims the row's of returning initial stage returns discharge opeing (account for entirety and return 10%～about the 20% of lifting rate), it is impossible to realize returning
Discharge opeing large-scale recovery, still have substantial amounts of return discharge opeing cannot recycling.
Summary of the invention
In order to overcome the deficiencies in the prior art, the present invention provides a kind of fracturing outlet liquid to recycle again
Application way and device.
A kind of fracturing outlet liquid recycling reuse method, comprises the following steps:
Step a, fracturing outlet liquid carry out gas-liquid separation through gas-liquid separation device；
Step b, liquid entrance sand setting oil removing pot carries out desanding and removes condensate；
Step c, by pump by remove condensate tank in liquid pump in deionization tank, remove metal
Ion；
Liquid after step d, process filters through filtering tank, removes precipitation further；
Step e, liquid after filtering enter fracturing outlet liquid storage tank, sample from tank into
The full ion analysis of row, supplements the additive of disappearance so that it is can meet fracturing fluid construction requirement；
Also include:
Step f, fracturing outlet liquid are through gas-liquid separation device, and gas burns in gas combustion apparatus,
Liquid enters sand setting oil removing pot；
After step g, fracturing outlet liquid remove upper strata condensate, enter deionization tank, pass through deionization
Tank connected pharmacy jar, injects ion processing agent sodium carbonate in batches；Deionization tank is installed online
PH value determinator, the pH value of liquid in on-line determination deionization tank；When pH reaches more than 8.5
Time, the high volence metal ion major part such as calcium, magnesium, ferrum is precipitated, and remains a small amount of metal ion pair
Liquid recycling performance impact is less；
Liquid after step h, process is through 10～12h natural subsidence, and precipitate is from deionization tank
Side discharges, and the filtering tank that liquid is lifted into band filter screen through pump filters；At liquid infusion pipeline
Upper connection has effusion meter, controls lifting liquid flow by pump；
Filtrate after step i, process enters fracturing outlet liquid storage tank and deposits；
Step j, according to construction requirement, periodically carry out from the sample tap of fracturing outlet liquid storage tank
Sampling, is analyzed remaining additive concentration, is then entered by pump various medicament of infusion from medicament supply tank
Row supplements, and adjusts liquid properties so that it is reach fracturing work liquid properties requirement；
Step k, take tuning performance after fracturing outlet liquid carry out fracturing fluid property evaluation, conform to
Fluid reservoir is proceeded to for lower a bite well fracturing work after asking.
A kind of fracturing outlet liquid recycling reuse means, sand setting oil removing pot connects the one of the first pump
End, the other end of the first pump connects first-class gauge, and the other end of first-class gauge connects the first valve,
The other end connection deionization tank of the first valve, deionization tank connection deionization pot bottom the second valve,
Second gauge, pharmacy jar connects the second pump, and the other end of the second pump connects deionization tank, second
Gauge connects the 3rd pump, and the other end of the 3rd pump connects filtering tank, and the other end of filtering tank connects the 4th
Pump, the other end of the 4th pump connects fracturing fluid recovery (backflow) liquid special tune flow container, the special tune of fracturing fluid recovery (backflow) liquid
Flow container connects the 3rd valve, sample tap, the 6th pump and the 5th bottom fracturing fluid recovery (backflow) liquid special tune flow container
Pump, the other end of the 5th pump connects fracturing fluid storage tank, several companies of fracturing fluid storage tank
Connecing the 4th valve, the other end of the 6th pump connects medicament supply tank.
There is advantages that the present invention pass through gas-liquid separation → oil-water separation → except high price
Metal ion → filtration → remnants additive concentration mensuration → supplemented by additives → performance evaluation → repetition
The technology such as utilization, for recycling containing the fracturing fluid recovery (backflow) liquid of condensate, formation water, it is achieved
The recycling of fracturing outlet liquid.
Compared with prior art: the present invention fully reclaims and make use of the remaining interpolation in fracturing outlet liquid
Agent and water resource, saved fracturing fluid dosing water and dosing material, decreased waste liquid harmless treatment
Amount, it is achieved that energy-saving and emission-reduction；The technological process that the present invention compares electrochemical process is short, and disposal ability is strong,
The all devices dismounting related to is fast with convenient transportation processing speed, can adapt to well array liquid speed of constructing very well
Degree, reaches synchronization process and returns the effect of discharge opeing.Next mouthful of well can be carried out the soonest after the row of returning 24h
Fracturing work；Qualified discharge cost of sewage disposal is 220 yuan/m at present3, fresh base fluid cost is
1400～2000 yuan/m3Cost, after this method process, the operation without fracturing fluid additive becomes
Originally it is 15.00 yuan/m3, being processed into the cost that fresh base fluid can recycle is 700 yuan/m3Left and right,
Containing medicament expense, power consumption expense, personnel's wage and plant maintenance expense, processing cost is low, should
With wide.The present invention can process condensate content (volume ratio) within 10%, formation water content
In below 10000ppm fracturing outlet liquid recycling, and without strong acid and strong base in removal process,
Production safety and not limited by environment, not to environment.
Accompanying drawing explanation
When considered in conjunction with the accompanying drawings, by referring to detailed description below, it is possible to more completely preferably
Understand the present invention and easily learn the advantage that many of which is adjoint, but accompanying drawing described herein is used for
A further understanding of the present invention is provided, constitutes the part of the present invention, the schematic enforcement of the present invention
Example and explanation thereof are used for explaining the present invention, are not intended that inappropriate limitation of the present invention, such as figure wherein:
Fig. 1 is the structural representation of the present invention.
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Detailed description of the invention
Obviously, the many modifications and variations that those skilled in the art are done based on spirit of the invention belong to
Protection scope of the present invention.
Embodiment 1: as it is shown in figure 1, a kind of fracturing outlet liquid recycling recycling side device,
Including sand setting oil removing pot 1, deionization tank 7, filtering tank 10, fracturing outlet liquid special tune flow container 12
And if fracturing outlet liquid storage tank 16.
Described sand setting oil removing pot 1 connects the first pump 2, first-class gauge 3 and the first valve
4, the liquid after process pumps into deionization tank 7 according to certain flow；Deionization tank 7 carries deionization
Pot bottom the second valve 8, the pharmacy jar 5 of outer tape splicing the second pump 6, deionization tank 7 can be provided and go
Ionic agent；Liquid after process injects filtering tank 10 by second gauge 19 and the 3rd pump 9；Cross
Liquid after filter injects the fracturing outlet liquid process tank 12 with the 3rd valve 13 by the 4th pump 11.
It is analyzed by sample tap 14；Liquid in fracturing fluid recovery (backflow) liquid special tune flow container 12 is by carrying
The fracturing outlet liquid storage tank 16(of pump 15 several) deposit, fracturing fluid special tune liquid
The external medicament supply tank 18 carrying the 6th pump 17 of tank 12 carries out medicament and supplements.Pass through between tank body
Pipeline and pump with valve are connected in sequence.
Liquid after certain engineering construction, after tapping line, gas-water separation, be directly entered sand setting every
Oil tank 1, carries out oil-water separation, and then extraction lower floor liquid enters deionization by first-class gauge 3
Tank 7, it is simultaneously connected with the second pump 6 of dosing by pipe-line mixer entrance and pharmacy jar 5 adds simultaneously
Deioniser, after deionization processes, pumps into bottom by the first pump 2 of liquid by liquid and is provided with
The deionization tank 7 of deionization tank the second valve 8, go the precipitation produced during deionization by go from
Sub-pot bottom the second valve 8 is got rid of, and the liquid the 3rd pump 9 by liquid, by second gauge 19
Control flow according to 3m3The flow velocity of/min passes through filtering tank 10, filters liquid further, after filtration
Clear liquid enters and returns fracturing fluid recovery (backflow) liquid special tune flow container 12, is sampled analyzing by sample tap 14,
Analyze the ion concentration returning discharge opeing, simultaneously by the liquid in special for fracturing fluid recovery (backflow) liquid tune flow container 12
It is implanted sequentially fracturing outlet liquid storage tank 16, while injection, according to analysis result above
Connect medicament supply tank 18 and the 6th pump 17 of liquid, adsorbed by stratum according to analyzing appropriate supplementing
Thickening agent, cleanup additive, clay stabilizer antibacterial etc..Return after discharge opeing handles well, carry out clump at once
The construction of a bite well under formula well group, after having constructed, repeats said process, proceeds to return discharge opeing and reclaims
Recycling.
Embodiment 2: as it is shown in figure 1, a kind of fracturing outlet liquid recycling reuse means, sand setting
Oil removing pot 1 connects one end of the first pump 2, and the other end of the first pump 2 connects first-class gauge 3, the
The other end of flow meters 3 connects the first valve 4, and the other end of the first valve 4 connects deionization tank
7, deionization tank 7 connects deionization pot bottom the second valve 8, second gauge 19, pharmacy jar 5
Connecting the second pump 6, the other end of the second pump 6 connects deionization tank 7, and second gauge 19 connects the
Three pumps 9, the other end of the 3rd pump 9 connects filtering tank 10, and the other end of filtering tank 10 connects the 4th
Pump 11, the other end of the 4th pump 11 connects fracturing fluid recovery (backflow) liquid special tune flow container 12, fracturing fluid recovery (backflow)
Liquid special tune flow container 12 connects the 3rd valve 13, sample tap bottom fracturing fluid recovery (backflow) liquid special tune flow container
14, the 6th pump 17 and the 5th pump 15, it is special that the other end of the 5th pump 15 connects several fracturing fluids
Fluid reservoir 16, several fracturing fluid storage tanks 16 connect the 4th valve 20, the 6th pump 17
The other end connects medicament supply tank 18, and there are sediment outflow pipeline, sand setting oil removing in the lower end of sand setting oil removing pot 1
One end of tank 1 has oil suction extraction channel runs, and the other end of sand setting oil removing pot 1 is for returning Drainage pipe.
Carrying out fracturing fluid recovery well time at scene, Sichuan-chongqing Region more than 30 times, full recycle returns row pressure
Split liquid 2000m3Above, all constructing successfully, major part obtains yield.Individual well is saved clear water purchase
Expense 120,000, saves sewage disposal expense 440,000, saves fracturing fluid cost savings 7 × 105Unit～14
×105If unit is for the above collecting well group of 2 wells time, it is also possible to save drilling completion expense 200
More than ten thousand/well.
As it has been described above, embodiments of the invention are explained, but as long as substantially
Inventive point and effect without departing from the present invention can have a lot of deformation, and this is to those skilled in the art
It is apparent from for Yuan.Therefore, such variation is also integrally incorporated in the protection model of the present invention
Within enclosing.
Claims (2)
1. a fracturing outlet liquid recycling reuse method, it is characterised in that comprise the following steps:
Step a, fracturing outlet liquid carry out gas-liquid separation through gas-liquid separation device；
Step b, liquid entrance sand setting oil removing pot carries out desanding and removes condensate；
Step c, by pump by remove condensate tank in liquid pump in deionization tank, remove metal ion；
Liquid after step d, process filters through filtering tank, removes precipitation further；
Step e, liquid after filtering enter fracturing outlet liquid storage tank, and from tank, sampling carries out full ion
Analyze, supplement the additive of disappearance so that it is meet fracturing fluid construction requirement；
Also include:
Step f, fracturing outlet liquid are through gas-liquid separation device, and gas burns in gas combustion apparatus, and liquid enters
Enter sand setting oil removing pot；
Step g, remove upper strata condensate after, enter deionization tank, by the tank connected pharmacy jar of deionization, point
Batch injects ion processing agent sodium carbonate；In deionization tank install on-line pH value determinator, on-line determination go from
The pH value of liquid in sub-tank；When pH reaches more than 8.5, include the high volence metal ion of calcium, magnesium, ferrum
Major part is precipitated, and remains a small amount of metal ion less on liquid recycling performance impact；
Liquid after step h, process is through 10～12h natural subsidence, and precipitate is discharged below deionization tank,
The filtering tank that liquid is lifted into band filter screen through pump filters；Liquid infusion pipeline connects and has effusion meter,
Lifting liquid flow is controlled by pump；
Filtrate after step i, process enters fracturing outlet liquid storage tank and deposits；
Step j, according to construction requirement, periodically the sample tap from fracturing outlet liquid storage tank is sampled, point
The remaining additive concentration of analysis, is then supplemented by pump various medicament of infusion from medicament supply tank, adjusts liquid
Performance so that it is reach fracturing work liquid properties requirement；
Step k, take tuning performance after fracturing outlet liquid carry out fracturing fluid property evaluation, proceed to after meeting the requirements storage
Flow container is used for lower a bite well fracturing work.
2. a fracturing outlet liquid recycling reuse means, it is characterised in that sand setting oil removing pot connects one end of the first pump,
The other end of the first pump connects first-class gauge, and the other end of first-class gauge connects the first valve, the first valve
The other end connects deionization tank, and deionization tank connects deionization pot bottom the second valve, second gauge, pharmacy jar
Connecting the second pump, the other end of the second pump connects deionization tank, and second gauge connects the 3rd pump, the 3rd pump another
One end connects filtering tank, and the other end of filtering tank connects the 4th pump, and the other end of the 4th pump connects fracturing fluid recovery (backflow) liquid
Special tune flow container, fracturing fluid recovery (backflow) liquid special tune flow container connect the 3rd valve bottom fracturing fluid recovery (backflow) liquid special tune flow container,
Sample tap, the 6th pump and the 5th pump, the other end of the 5th pump connects fracturing fluid storage tank, the special storage of fracturing fluid
Several connection the 4th valves of flow container, the other end of the 6th pump connects medicament supply tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310655236.4A CN104692555B (en) | 2013-12-06 | 2013-12-06 | Method and device for recycling fracturing flow-back fluid |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310655236.4A CN104692555B (en) | 2013-12-06 | 2013-12-06 | Method and device for recycling fracturing flow-back fluid |
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| CN104692555B true CN104692555B (en) | 2016-12-07 |
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| CN105255474B (en) * | 2015-09-02 | 2020-05-08 | 中国石油集团渤海钻探工程有限公司 | Selective treatment and reuse method for fracturing flow-back fluid |
| CN105255475B (en) * | 2015-09-16 | 2018-07-20 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of guanidine glue fracturing outlet liquid recycling method |
| CN105221134B (en) * | 2015-10-19 | 2017-11-10 | 中国石油大学(北京) | A kind of Fractured Gas Wells return the method for discrimination that discharge opeing is formed with stratum water |
| CN106345625A (en) * | 2016-10-27 | 2017-01-25 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Umbrella-shaped liquid atomizer and application thereof |
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| US20070056913A1 (en) * | 2005-08-19 | 2007-03-15 | Burt David C | Portable oil field waste water treatment and recycling system |
| CN101805090B (en) * | 2010-02-23 | 2011-12-14 | 北京欧泰克石油工程技术有限责任公司 | Process for treating fracturing flow-back fluid of oil well |
| CN102992524B (en) * | 2012-04-23 | 2014-12-17 | 北京矿冶研究总院 | Treatment method of fracturing flow-back fluid |
| CN103359867A (en) * | 2013-08-06 | 2013-10-23 | 华油惠博普科技股份有限公司 | Method and device for fracturing flowback fluid treatment |
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