CN108439712A - A kind of oil-gas field fracturing returns drain processing method - Google Patents

A kind of oil-gas field fracturing returns drain processing method Download PDF

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Publication number
CN108439712A
CN108439712A CN201810311410.6A CN201810311410A CN108439712A CN 108439712 A CN108439712 A CN 108439712A CN 201810311410 A CN201810311410 A CN 201810311410A CN 108439712 A CN108439712 A CN 108439712A
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Prior art keywords
filter
oil
processing method
air
gas field
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Pending
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CN201810311410.6A
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Chinese (zh)
Inventor
王雅东
吴文琼
朱元龙
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HUBEI PETROKH MACHINE MANUFACTURING Co Ltd
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HUBEI PETROKH MACHINE MANUFACTURING Co Ltd
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Priority to CN201810311410.6A priority Critical patent/CN108439712A/en
Publication of CN108439712A publication Critical patent/CN108439712A/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/24Treatment of water, waste water, or sewage by flotation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/30Treatment of water, waste water, or sewage by irradiation
    • C02F1/32Treatment of water, waste water, or sewage by irradiation with ultraviolet light
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56Macromolecular compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/72Treatment of water, waste water, or sewage by oxidation
    • C02F1/76Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/10Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions

Abstract

A kind of oil-gas field fracturing of present invention offer returns drain processing method, includes the following steps:Glue is broken in oxidation;Coagulation air-float;By-pass filtration;Secondary filtration;Sterilization;Three-stage filtration;Fine filtering.The equipment of the present invention includes by the sequentially connected oxidation pond of pipeline, flotation tank, quartz filter, bag filter, ultraviolet sterilizer, modified fiber ball filter, ceramic membrane microfiltration device;Three-phase mixer is equipped with wherein in oxidation pond, air-flotation system;The present invention is additionally provided with chemicals dosing plant area and automatically controls area, and oxidation pond and air-flotation system are connected with corresponding grug feeding jar respectively, this project uses full air-dissolving air-float mode, molten large-minded, increases suspended matter and bubble contact chance, and required flotation tank takes up little area;Airfloat equipment is equipped with vortex three-phase mixer simultaneously, integrates molten gas, differential stirring, flco aerating, particle attachment, the generation of molten gas nucleus and bubble release function.

Description

A kind of oil-gas field fracturing returns drain processing method
Technical field
The invention belongs to technical field of waste water processing, more particularly to a kind of oil-gas field fracturing returns drain processing method.
Background technology
Hydraulic fracturing technology is widely used in oil and gas exploitation, and the water conservancy diversion of oil-gas Layer can be promoted by hydraulic fracturing Ability can cause a large amount of fracturing fluid recovery (backflow)s to ground simultaneously to reach volume increase purpose.With continually developing for China oil field, oil Gas well fracturing returns drain discharge capacity and is continuously increased.
Fracturing outlet liquid contains the various chemical addition agents in original fracturing fluid, simultaneously because contacted for a long time with stratum, Also contain the pollutants such as suspension organic impurities, phenols, aldehydes.Fracturing outlet liquid is high with viscosity, emulsification degree is big, height is chemical needs The feature of oxygen amount, high total suspended matter and water quality complexity, if without rationally disposing and direct emission, it can be to underground water, earth's surface Water, soil cause huge harm, or even directly or indirectly threaten human health.
The purpose of fracturing outlet liquid processing is divided into outer row, reuse, re-injection, and outer row's water quality index is more, and intractability is maximum, at This highest, re-injection are the processing modes that current each major oil and gas field generally uses.Therefore, it develops a kind of with higher economical and efficient Fracturing outlet liquid injected technology up to standard is significant to environmental protection and social development.
Invention content
Of the existing technology in order to solve the problems, such as, the present invention provides a kind of oil-gas field fracturings to return row's processing method, main Physico-chemical process is used, has the characteristics that treatment effect is good, cost is relatively low, the cycle of operation is short, water quality meets after processing Oil field reinjection water standard.
To achieve the goals above, the present invention is to realize by the following technical solutions:A kind of oil-gas field fracturing returns row Liquid processing method includes the following steps:
(1) it aoxidizes and breaks glue:Oxidant is added into fracturing outlet liquid in oxidation pond, the oxidant is that sodium hypochlorite is molten Liquid, effective chlorine density 10%, dosage 5-6g/L are sufficiently stirred, and react 30min;
(2) coagulation air-float:Oxidized water outlet after breaking gel is passed through airfloat equipment, it is fully anti-that coagulant, flocculation aid is added It answers, the airfloat equipment is full air-dissolving air-float equipment;
(3) by-pass filtration:Coagulation air-float water outlet is filtered into grade one filter, and the grade one filter is quartz sand Filter, it is 0.4-0.8mm that quartz sand, which selects specification,;
(4) secondary filtration:Water outlet enters secondary filter and filters after grade one filter filters, and the secondary filter is Bag filter, inside have three layers to remove oil bag, and filter bag material is PE non-woven fabrics, efficient degreasing cotton, filtering accuracy 1um;
(5) it sterilizes:Secondary filter water outlet is sterilized into sterilizing unit;
(6) three-stage filtration:It is discharged after sterilization and is filtered into tertiary filter;
(7) fine filtering:After tertiary filter water outlet enters fine filter progress fine filtering, it is discharged direct re-injection.
As a kind of preferred embodiment of the present invention, it is 5 or so to aoxidize pH value when breaking glue, and pH value is 6-7 left when coagulation air-float It is right.
As a kind of preferred embodiment of the present invention, the coagulant is aluminium polychloride, and flocculation aid is cation polypropylene Amide (molecular weight is 1600-2000 ten thousand), aluminium polychloride dosage are 0.6-2g/L, and polyacrylamide dosage is 0.02- 0.1g/L。
As a kind of preferred embodiment of the present invention, the dross that the coagulation air-float generates is through concentrating compression processing, dross pressure The equipment used contract for folded spiral shell machine, the concentrated water that the liquid and fine filtering of generation generate enters the broken glue step of oxidation.
As a kind of preferred embodiment of the present invention, the sterilizing unit is ultraviolet sterilizer, selects that overflow-type is ultraviolet kills Bacterium device.
As a kind of preferred embodiment of the present invention, the tertiary filter is modified fiber ball filter.
As a kind of preferred embodiment of the present invention, the fine filter is ceramic membrane microfiltration device, ceramics fenestra used Diameter is 0.05um.
As a kind of preferred embodiment of the present invention, it is equipped with blender in the oxidation pond, and be connected with oxidating chemicals tank, be used in combination Metering pump is controlled and is measured.
As a kind of preferred embodiment of the present invention, it is equipped with three-phase mixer in air-flotation system, and is connected with coagulation, flocculation medicament Tank is used in combination metering pump to be controlled and measured.
Beneficial effects of the present invention are:
1, this project can reduce waste water viscosity in such a way that glue is broken in oxidation and coagulation air-float is combined after broken glue processing, Be conducive to improve coagulation air-float effect.
2, this project uses full air-dissolving air-float mode, molten large-minded, increases suspended matter and bubble contact chance, and required gas Floating pond takes up little area;Simultaneously airfloat equipment be equipped with vortex three-phase mixer, collect molten gas, differential stirring, flco aerating, particle adhere to, Molten gas nucleus generates and bubble release function is in one.
3, the present invention uses multistage filtering technique, the more stable removal pollutant of energy.
4, terminal of the present invention uses ceramic membrane filter system, improves effluent quality.
Description of the drawings
Fig. 1 is the process flow chart that a kind of oil-gas field fracturing returns drain processing method;
Specific implementation mode
To make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, with reference to Specific implementation mode, the present invention is further explained.
Referring to Fig. 1, the present invention provides a kind of technical solution:A kind of oil-gas field fracturing returns drain processing method, including with Lower step:
(1) it aoxidizes and breaks glue:Oxidant is added into fracturing outlet liquid in oxidation pond, the oxidant is that sodium hypochlorite is molten Liquid, effective chlorine density 10%, dosage 5-6g/L are sufficiently stirred, and react 30min;
(2) coagulation air-float:Oxidized water outlet after breaking gel is passed through airfloat equipment, it is fully anti-that coagulant, flocculation aid is added It answers, the airfloat equipment is full air-dissolving air-float equipment;
(3) by-pass filtration:Coagulation air-float water outlet is filtered into grade one filter, and the grade one filter is quartz sand Filter, it is 0.4-0.8mm that quartz sand, which selects specification,;
(4) secondary filtration:Water outlet enters secondary filter and filters after grade one filter filters, and the secondary filter is Bag filter, inside have three layers to remove oil bag, and filter bag material is PE non-woven fabrics, efficient degreasing cotton, filtering accuracy 1um;
(5) it sterilizes:Secondary filter water outlet is sterilized into sterilizing unit;
(6) three-stage filtration:It is discharged after sterilization and is filtered into tertiary filter;
(7) fine filtering:After tertiary filter water outlet enters fine filter progress fine filtering, it is discharged direct re-injection.
As a kind of preferred embodiment of the present invention, it is 5 or so to aoxidize pH value when breaking glue, and pH value is 6-7 left when coagulation air-float It is right.
As a kind of preferred embodiment of the present invention, the coagulant is aluminium polychloride, and flocculation aid is cation polypropylene Amide (molecular weight is 1600-2000 ten thousand), aluminium polychloride dosage are 0.6-2g/L, and polyacrylamide dosage is 0.02- 0.1g/L。
As a kind of preferred embodiment of the present invention, the dross that the coagulation air-float generates is through concentrating compression processing, dross pressure The equipment used contract for folded spiral shell machine, the concentrated water that the liquid and fine filtering of generation generate enters the broken glue step of oxidation.
As a kind of preferred embodiment of the present invention, the sterilizing unit is ultraviolet sterilizer, selects that overflow-type is ultraviolet kills Bacterium device.
As a kind of preferred embodiment of the present invention, the tertiary filter is modified fiber ball filter.
As a kind of preferred embodiment of the present invention, the fine filter is ceramic membrane microfiltration device, ceramics fenestra used Diameter is 0.05um, transmembrane pressure 0.2Mpa, and sewage temperature is 25 DEG C, and device uses cross-flow filtration, waste water filtrate after filtering It is directly used in re-injection, concentrated water enters system oxidation pond and handled.
As a kind of preferred embodiment of the present invention, it is equipped with blender in the oxidation pond, and be connected with oxidating chemicals tank, be used in combination Metering pump is controlled and is measured.
As a kind of preferred embodiment of the present invention, it is equipped with three-phase mixer in air-flotation system, and is connected with coagulation, flocculation medicament Tank is used in combination metering pump to be controlled and measured.
Operation principle:The equipment of the present invention includes by the sequentially connected oxidation pond of pipeline, flotation tank, quartz sand filtration Device, bag filter, ultraviolet sterilizer, modified fiber ball filter, ceramic membrane microfiltration device;Wherein oxidation pond, air supporting system Three-phase mixer is equipped in system;The present invention is additionally provided with chemicals dosing plant area and automatically controls area, oxidation pond and air-flotation system respectively with The connection of corresponding grug feeding jar, fracturing outlet liquid sequentially enter oxidation pond, flotation tank, quartz filter, bag filter, ultraviolet Line sterilizer, modified fiber ball filter, ceramic membrane microfiltration device are handled, using present treatment technique to fracturing outlet liquid Re-injection Con trolling index removal efficiency is high, and high treating effect can meet oil field reinjection water matter standard after processing.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention, for this field skill For art personnel, it is clear that invention is not limited to the details of the above exemplary embodiments, and without departing substantially from the present invention spirit or In the case of essential characteristic, the present invention can be realized in other specific forms.Therefore, in all respects, should all incite somebody to action Embodiment regards exemplary as, and is non-limiting, the scope of the present invention by appended claims rather than on state Bright restriction, it is intended that including all changes that come within the meaning and range of equivalency of the claims in the present invention It is interior.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiment being appreciated that.

Claims (9)

1. a kind of oil-gas field fracturing returns drain processing method, which is characterized in that include the following steps:
(1) it aoxidizes and breaks glue:Oxidant is added into fracturing outlet liquid in oxidation pond, the oxidant is liquor natrii hypochloritis, Effective chlorine density is 10%, and dosage 5-6g/L is sufficiently stirred, and reacts 30min;
(2) coagulation air-float:Oxidized water outlet after breaking gel is passed through airfloat equipment, coagulant is added, flocculation aid fully reacts, institute It is full air-dissolving air-float equipment to state airfloat equipment;
(3) by-pass filtration:Coagulation air-float water outlet is filtered into grade one filter, and the grade one filter is quartz sand filtration Device, it is 0.4-0.8mm that quartz sand, which selects specification,;
(4) secondary filtration:Water outlet enters secondary filter and filters after grade one filter filters, and the secondary filter is pocket type Filter, inside have three layers to remove oil bag, and filter bag material is PE non-woven fabrics, efficient degreasing cotton, filtering accuracy 1um;
(5) it sterilizes:Secondary filter water outlet is sterilized into sterilizing unit;
(6) three-stage filtration:It is discharged after sterilization and is filtered into tertiary filter;
(7) fine filtering:After tertiary filter water outlet enters fine filter progress fine filtering, it is discharged direct re-injection.
2. a kind of oil-gas field fracturing according to claim 1 returns drain processing method, which is characterized in that pH when glue is broken in oxidation Value is 5 or so, and pH value is 6-7 or so when coagulation air-float.
3. a kind of oil-gas field fracturing according to claim 1 returns drain processing method, which is characterized in that the coagulant is Aluminium polychloride, flocculation aid are cationic polyacrylamide (molecular weight is 1600-2000 ten thousand), and aluminium polychloride dosage is 0.6-2g/L, polyacrylamide dosage are 0.02-0.1g/L.
4. a kind of oil-gas field fracturing according to claim 1 returns drain processing method, which is characterized in that the coagulation air-float The dross of generation is through concentrating compression processing, and the equipment that dross compression uses is folded spiral shell machine, liquid and the fine filtering production of generation Raw concentrated water enters oxidation and breaks glue step.
5. a kind of oil-gas field fracturing according to claim 1 returns drain processing method, which is characterized in that the sterilizing unit For ultraviolet sterilizer, overflow-type ultraviolet sterilizer is selected.
6. a kind of oil-gas field fracturing according to claim 1 returns drain processing method, which is characterized in that the three-stage filtration Device is modified fiber ball filter.
7. a kind of oil-gas field fracturing according to claim 1 returns drain processing method, which is characterized in that the fine filtering Device is ceramic membrane microfiltration device, and ceramics membrane aperture used is 0.05um.
8. a kind of oil-gas field fracturing according to claim 1 returns drain processing method, which is characterized in that in the oxidation pond Equipped with blender, and it is connected with oxidating chemicals tank, metering pump is used in combination to be controlled and measured.
9. a kind of oil-gas field fracturing according to claim 1 returns drain processing method, which is characterized in that set in air-flotation system There is three-phase mixer, and be connected with coagulation, flocculation pharmacy jar, metering pump is used in combination to be controlled and measured.
CN201810311410.6A 2018-04-09 2018-04-09 A kind of oil-gas field fracturing returns drain processing method Pending CN108439712A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109534581A (en) * 2018-12-30 2019-03-29 南京霄祥工程技术有限公司 A kind of Zero-discharge treating process of Cutting Liquid Wastewater
CN110240328A (en) * 2019-07-19 2019-09-17 西安富仕兴环保科技有限公司 A kind of sewerage integrated efficient process equipment of skid-mounted type
CN110467298A (en) * 2019-08-23 2019-11-19 杰瑞环保科技有限公司 A kind of fracturing outlet liquid immediate processing method
CN110482759A (en) * 2019-08-28 2019-11-22 宜兴国际环保城科技发展有限公司 A kind of comprehensive waste liquid multiplexed combination recovery processing technique of oilfield operation
CN110510771A (en) * 2019-08-23 2019-11-29 杰瑞环保科技有限公司 A kind of guanidine colloid system fracturing outlet liquid processing method and processing device
CN110902875A (en) * 2019-11-19 2020-03-24 西安威尔电子有限责任公司 Oil-gas field produced water treatment system and method based on ozone air floatation device
CN112624411A (en) * 2020-12-17 2021-04-09 华东理工大学 Deep purification method and device for fracturing flowback fluid
CN112679020A (en) * 2020-12-25 2021-04-20 成都硕特环保科技有限公司 Low-cost shale gas fracturing flowback fluid treatment system and treatment method
CN113526730A (en) * 2021-07-26 2021-10-22 南京南环水务科技有限公司 Fracturing flow-back fluid treatment method and treatment device
CN115259470A (en) * 2022-08-18 2022-11-01 延安圣洋环保有限公司 Treatment method of fracturing flow-back fluid

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109534581A (en) * 2018-12-30 2019-03-29 南京霄祥工程技术有限公司 A kind of Zero-discharge treating process of Cutting Liquid Wastewater
CN110240328A (en) * 2019-07-19 2019-09-17 西安富仕兴环保科技有限公司 A kind of sewerage integrated efficient process equipment of skid-mounted type
CN110467298A (en) * 2019-08-23 2019-11-19 杰瑞环保科技有限公司 A kind of fracturing outlet liquid immediate processing method
CN110510771A (en) * 2019-08-23 2019-11-29 杰瑞环保科技有限公司 A kind of guanidine colloid system fracturing outlet liquid processing method and processing device
CN110482759A (en) * 2019-08-28 2019-11-22 宜兴国际环保城科技发展有限公司 A kind of comprehensive waste liquid multiplexed combination recovery processing technique of oilfield operation
CN110902875A (en) * 2019-11-19 2020-03-24 西安威尔电子有限责任公司 Oil-gas field produced water treatment system and method based on ozone air floatation device
CN112624411A (en) * 2020-12-17 2021-04-09 华东理工大学 Deep purification method and device for fracturing flowback fluid
CN112679020A (en) * 2020-12-25 2021-04-20 成都硕特环保科技有限公司 Low-cost shale gas fracturing flowback fluid treatment system and treatment method
CN113526730A (en) * 2021-07-26 2021-10-22 南京南环水务科技有限公司 Fracturing flow-back fluid treatment method and treatment device
CN115259470A (en) * 2022-08-18 2022-11-01 延安圣洋环保有限公司 Treatment method of fracturing flow-back fluid

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