CN105540933A - Method and system for rapid treatment of oil-water well return acidizing fluid - Google Patents
Method and system for rapid treatment of oil-water well return acidizing fluid Download PDFInfo
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- CN105540933A CN105540933A CN201610053381.9A CN201610053381A CN105540933A CN 105540933 A CN105540933 A CN 105540933A CN 201610053381 A CN201610053381 A CN 201610053381A CN 105540933 A CN105540933 A CN 105540933A
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- discharge opeing
- acidifying
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- gac
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G33/00—Dewatering or demulsification of hydrocarbon oils
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G33/00—Dewatering or demulsification of hydrocarbon oils
- C10G33/04—Dewatering or demulsification of hydrocarbon oils with chemical means
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G33/00—Dewatering or demulsification of hydrocarbon oils
- C10G33/06—Dewatering or demulsification of hydrocarbon oils with mechanical means, e.g. by filtration
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/10—Feedstock materials
- C10G2300/1033—Oil well production fluids
Abstract
The invention provides a method and system for rapid treatment of oil-water well return acidizing fluid. For oil well return acidizing fluid, the method comprises the steps of adding alkali, demulsifier and complexing agent to the oil well return acidizing fluid in sequence, and conducting even stirring, so that pretreated return acidizing fluid is obtained; conducting microwave treatment and centrifugal separation on the pretreated return acidizing fluid, and separating crude oil out of the return acidizing fluid; filtering the return acidizing fluid with crude oil separated out by means of activated carbon and/or a ceramic membrane, wherein filter residues are attached to the activated carbon and/or the ceramic membrane, and filtrate is treated up-to-standard stratum reinjection water; conducting microwave heating treatment on the activated carbon and/or the ceramic membrane to which the filter residues are attached to enable temperature to increase to the target temperature 300-1400 DEG C, and controlling the filter residue standing time to be 1-30 min after temperature increases to the target temperature, wherein organic matter in the filter residues is pyrolyzed during microwave heating treatment.
Description
Technical field
The present invention relates to a kind of oil and water well acidifying and return discharge opeing immediate processing method and system, belong to oil well acidation and return discharge opeing processing technology field.
Background technology
By land or in offshore oil field development process, oil and water well being carried out acidifying is the increasing yield and injection means commonly used the most, and it can remove reservoir pollution, even transforms hydrocarbon zone, and then reach the object improving Oil/gas Well output or intensified injection of wells.Due to returning in discharge opeing containing acidification oil (water in oil emulsion and oil-in-water emulsion), residual acid, acidizing additive, clay particle, acidification reaction product (as calcium chloride, Sodium Silicofluoride) after acidifying, therefore it can bring the puzzlement of two aspects to field produces, one is after residual acid returns discharge from stratum, its pH value is general all about 1, at this moment the corrosive power of residual acid is very strong, can cause serious corrosion to pump, oil pipe etc.And there is higher salinity due to residual acid, cause its specific conductivity to increase, and then the normal operation of electrical dehydrator can be affected.Therefore, pH value, salinity, specific conductivity are also evaluate the important indicator of residual acid.Two is because the acidification oil of emulsification is moisture higher, causes its electric conductivity to increase, will frequently cause crude oil gathering system trip phenomenon after it enters fuel transfer system, and then have a strong impact on the normal production in oil field; Three is owing to returning complicated component in discharge opeing, it contains acidification oil, residual acid (as HCl), residual acidizing additive (as hazardous and noxious substances such as thickening material, inhibiter, tensio-active agent, clay stabilizers), discharged ground or marine can be caused environmental pollution to the water quality, soil, earth's surface etc. of surrounding, be unfavorable for the harmonious development of petroleum industry, Green Development, environmental law institute is unallowed especially.
At present, this area processes the method that residual acid returns discharge opeing and mainly contains:
1, heatable adobe sleeping platform method, returns discharge opeing by residual acid and is placed in the heatable adobe sleeping platform dug, and relies on the residual acid of way process of seepage gradually; Particularly, exactly acidifying is returned discharge opeing and be placed in the heatable adobe sleeping platform dug, wherein the residual acid of part can leak into earth formation deep gradually, and the residual acid of part can be evaporated, thus reaches the object processing residual acid; The method is simple, and cost is low, but large to environmental hazard, has a far reaching influence;
2, neutralisation, is placed in the hole of antiseep by residual acid, then with alkali neutralization, by natural air drying, or residual acid is placed in sour pond, then uses in alkali with rear direct by its input tube communication system; Particularly, first enter in storage cylinder or suction pit exactly by returning discharge opeing (residual acid) after acidifying, then adding soda powder or caustic soda, to be neutralized to pH value be about 7, the more residual acid after neutralization is pumped into gathering line enter crude Treatment system; One of defect of this technology is: substantially do not carry out harmless treatment to residual acid, and just source of pollution are transferred to gathering system; Two is for comparatively thick acidification oil, and because emulsification is serious, gathering system is tripped frequent, impact is produced;
3, irrigation, constantly rinses with fresh water by acidification oil, reaches the residual acid of dilution, reduces the object of Pollutant levels.The shortcoming one of this way needs a large amount of fresh water, is at sea difficult to realize; Two are, because needs use clean fresh water to rinse, this certainly will cause new pollution, pollution is expanded in other words, and the problem of discharge opeing harmless treatment is returned in not basic solution;
4, re-injection method: be about to the water re-injection of qualified discharge to enter stratum;
5, chemical synthesis process-residual acidizer method, namely by the way of neutralization, inhibition, complexing to adjust the pH value of residual acid, reduction salinity and specific conductivity, does not affect the normal production in oil field after making residual acid enter pipe communication system.But the method just slow down the hazardness of residual acid, residual acid does not still reach the requirement of outer row, and therefore, the method does not also thoroughly solve outer row's problem of residual acid.
As can be seen here, there is several common feature in existing above-mentioned several method, and one is that residual acidic group does not originally process, and brings new pollution, as heatable adobe sleeping platform method to environment; Two is process too simply, and harm hidden danger is not eliminated, and as neutralisation, just displaced source of pollution; Although three is obtain to process to a certain extent, thorough, as residual sour comprehensive treatment agent method, to meet for the purpose of need of production after process, but do not reach emission standard.Four is substantially do not take treatment measures to acidification oil; But because acidification oil is moisture higher, after acidification oil enters gathering system, be easy to cause dewatering system trip phenomenon, affect oil field and normally produce.Along with the promulgation of new Law on Environmental Protection; the environmental consciousness of people is more and more stronger; require also more and more higher to environmental consciousness; therefore; develop the harmless treatment process of residual acid after quick, efficient, simple, free of contamination acidifying; and then realize the developing direction that green acidifying is petroleum industry from now on, be also trend of the times.
Summary of the invention
In order to solve the aforesaid drawbacks and deficiency, a kind of oil and water well acidifying is the object of the present invention is to provide to return discharge opeing immediate processing method.
The present invention also aims to provide a kind of oil and water well acidifying to return discharge opeing fast processing system.
For achieving the above object, the invention provides a kind of acidifying and returning discharge opeing immediate processing method, described acidifying is returned discharge opeing and is comprised well acidifying and return discharge opeing or oil well acidation returns discharge opeing;
Return discharge opeing for well acidifying, the method comprises the following steps:
A, to return in discharge opeing to well acidifying and add alkali to carry out neutralization reaction, after reaction terminates, obtain pretreated acidifying and return discharge opeing;
B, use gac and/or ceramic membrane return discharge opeing to pretreated acidifying and carry out filtration treatment, and filter residue is attached on gac and/or ceramic membrane, and filtrate is the stratum up to standard reinjected water after process;
After c, filtration terminate, microwave-heating process is carried out to the gac and/or ceramic membrane that are attached with filter residue, it is made to be warming up to the target temperature of 300-1400 DEG C, wherein, controlling to be attached to the temperature rise rate that the filter residue on gac and/or ceramic membrane rises to target temperature from room temperature is 3-100 DEG C/min, and the residence time controlled after filter residue is warming up to target temperature is 1-30min;
In microwave heating treatment process, the organism in filter residue is by pyrolysis;
Return discharge opeing for oil well acidation, the method comprises the following steps:
A, to return in discharge opeing to oil well acidation and add alkali, emulsion splitter and complexing agent successively, stir, obtain pretreated acidifying and return discharge opeing;
B, discharge opeing is returned to described pretreated acidifying carrying out microwave treatment, centrifugation, isolating crude oil from returning discharge opeing;
C, use gac and/or ceramic membrane carry out filtration treatment to isolating the discharge opeing of returning after crude oil, and filter residue is attached on gac and/or ceramic membrane, and filtrate is the stratum up to standard reinjected water after process;
After D, filtration terminate, microwave heating treatment is carried out to the gac and/or ceramic membrane that are attached with filter residue, it is made to be warming up to the target temperature of 300-1400 DEG C, wherein, controlling to be attached to the temperature rise rate that the filter residue on gac and/or ceramic membrane rises to target temperature from room temperature is 3-100 DEG C/min, and the residence time controlled after filter residue is warming up to target temperature is 1-30min;
Organism in microwave heating treatment process in filter residue is by pyrolysis.
According to method of the present invention, the method can reach stratum re-injection requirement by gac described in rational gradation composition and/or ceramic membrane to make the filtrate obtained through gac and/or ceramic membrane filter, namely filtrate oleaginousness is less than 0.3%, and concentration of suspension is less than 30ppm.
According to method of the present invention, the parameters such as the granularity of gac, the aperture of ceramic membrane can affect the filter effect of gac and/or ceramic membrane, therefore those skilled in the art can need to select suitable gac and/or ceramic membrane to return discharge opeing to pretreated acidifying according to site work and filter, and reach stratum re-injection requirement to make the filtrate obtained after gac and/or ceramic membrane filter.
In the preferred embodiment of the present invention, the granularity of described gac is 8-30 order, and the aperture of ceramic membrane is not more than 10 μm.
According to method of the present invention, return discharge opeing for well acidifying, in microwave heating treatment process, when temperature rises to 100 DEG C, the water in filter residue becomes water vapor; When being warmed up to more than 300 DEG C, the carbohydrate in filter residue is that small-molecule substance (methane, carbonic acid gas and water) vapors away or is oxidized to carbonic acid gas on the spot and water emits by pyrolysis.
According to method of the present invention, return discharge opeing for oil well acidation, the organism in filter residue comprises greasy dirt, acidizing additive and microorganism etc.;
In microwave heating treatment process, when temperature rises to 100 DEG C, the water in filter residue becomes water vapor; When being warmed up to more than 300 DEG C, the organism generation pyrolysis such as the greasy dirt in filter residue, acidizing additive become pyrolysis gas and trace Jiao (solid phase);
Described pyrolysis gas can be separated fuel-displaced, gas and water through multi-stage condensing, and condenser oil out as fuel wet goods or can enter pipe communication system; Water of condensation rear discharge up to standard; Not solidifying, the inflammable gas that decomposite can recycle or combustion in-situ emptying; Trace Jiao be detained can be prepared into gac with regard to activatable and again be used as filtration medium.
In microwave heating treatment process, the tamper be trapped in ceramic membrane can be removed, and when being warmed up to more than 650 DEG C, gac will be activated.
According to method of the present invention, preferably, the microwave treatment time described in step B is no less than 30s.
According to method of the present invention, preferably, centrifugation rate centrifugal described in step B is not less than 1000rpm, and centrifugation time is not less than 5min.
According to method of the present invention, preferably, for shaking out, discharge opeing is returned in well acidifying, and the method also comprises step a1: return discharge opeing to described pretreated acidifying and carry out microwave treatment, centrifugal clarification process, wherein, step a1 occurs between described step a and described step b;
More preferably described microwave treatment time is no less than 30s;
Also more preferably described centrifugal centrifugation rate is not less than 1000rpm, and centrifugation time is not less than 5min.
According to method of the present invention, described in the well that shakes out be greater than 0.2% or shake out every day and be greater than 0.5m for shaking out
3well.
According to method of the present invention, return discharge opeing for well acidifying, using gac and/or ceramic membrane to return to pretreated acidifying the filtrate obtained after filtration treatment is carried out in discharge opeing can use as stratum reinjected water; The residue (dry ash) obtained after the filter residue heated by microwave process of Adsorption And Retention on gac and/or ceramic membrane can use as well site pavior.
For shaking out, discharge opeing is returned in well acidifying, return after discharge opeing carries out microwave treatment, centrifugal clarification process to described pretreated acidifying, acidifying being returned discharge opeing uses gac and/or ceramic membrane to carry out filtration treatment again, and the filtrate obtained after filtration treatment can use as stratum reinjected water; The residue (dry ash) obtained after the filter residue heated by microwave process of Adsorption And Retention on gac and/or ceramic membrane can use as well site pavior.
Discharge opeing is returned for oil well acidation, discharge opeing is returned to described pretreated acidifying and carries out microwave, centrifuging treatment, obtain crude oil and water; The crude oil obtained is low wet oil, directly can be sent into pipe communication system; Water can use as stratum reinjected water after gac and/or ceramic membrane filter.
According to method of the present invention, preferably, return in discharge opeing to acidifying and add alkali until system is neutral (pH value is about 7) substantially;
Described alkali comprises sodium carbonate, sodium bicarbonate, sodium hydroxide, potassium hydroxide, salt of wormwood, saleratus, milk of lime or unslaked lime.Wherein, return in discharge opeing to acidifying and add alkali and can neutralize residual acid wherein.
According to method of the present invention, preferably, return in discharge opeing to oil well acidation and add emulsion splitter and reach more than 90% to make the breaking emulsion and dewatering rate of system;
Described emulsion splitter comprises the combination of one or more in ammonium chloride-Sodium Nitrite, aluminum chloride, the vitriol oil, magnesium sulfate, magnesium iron mixture and polyox-yethylene-polyoxypropylene block copolymer.Described emulsion splitter is the conventional commercial product that this area uses.
According to method of the present invention, preferably, to oil well acidation return in discharge opeing add complexing agent to make calcium in system, the chelation percent of magnesium ion reaches 100%;
Described complexing agent comprises hydroxy ethylidene-diphosphate (HEDP), ethylenediamine tetraacetic acid (EDTA) (EDTA), aminotrimethylene phosphoric acid (ATMP) or divinyl triammonium pentamethylene phosphoric acid (DTPMP).Wherein, in system, add complexing agent can the high valence ion such as calcium, magnesium in chelating systems, reduces residual acid ion intensity, and then reduces dielectric conductance rate.
According to method of the present invention, preferably, when described well acidifying returns that in discharge opeing, oleaginousness is greater than 5v%, first need to carry out pre-sedimentation separating treatment to it, after separation terminates, return discharge opeing to the aqueous phase being positioned at bottom according to described well acidifying again to process, according to described oil well acidation, discharge opeing is returned to superposed oil phase and processes;
When described oil well acidation returns that in discharge opeing, water content is greater than 70v%, first need to carry out pre-sedimentation separating treatment to it, after separation terminates, then according to described well acidifying, discharge opeing is returned to the aqueous phase being positioned at bottom process, according to described oil well acidation, discharge opeing is returned to superposed oil phase and processes.
According to method of the present invention, acidifying is returned after discharge opeing refers to and take acidifying measure to oil and water well, produce to prevent secondary sedimentation and avoid blocking stratum and return in time and discharge the residual acid solution of well head, the acidifying in the present invention return return discharge after discharge opeing refers to land or the acidifying of offshore oil and gas field oil and water well residual acid (HCl), acidification oil, acidizing additive, acidizing product (calcium chloride, silicofluoride etc.) and the composition such as solid flour sand or clay particle mixture.
According to method of the present invention, micro-wave frequency used is 300MHz-300GHz.
Present invention also offers a kind of acidifying returning discharge opeing immediate processing method for realizing above-mentioned acidifying and return discharge opeing fast processing system, this system comprises online mixing tank, microwave heating appts, centrifugal separating device, is provided with the microwave oven of gac and/or ceramic membrane filter core;
The downstream of described on-line mixing device is connected with microwave heating appts, the microwave oven that is provided with gac and/or ceramic membrane filter core respectively by pipeline;
Described microwave heating appts is connected with the microwave oven being provided with gac and/or ceramic membrane filter core via centrifugal separating device by pipeline;
On pipeline on pipeline on pipeline between on-line mixing device and microwave heating appts, between on-line mixing device and the microwave oven being provided with gac and/or ceramic membrane filter core, between centrifugal separating device and the microwave oven being provided with gac and/or ceramic membrane filter core, be equipped with valve.
According to system of the present invention, preferably, the upstream of described on-line mixing device is provided with pending acidifying and returns discharge opeing entrance;
Described centrifugal separating device is provided with crude exports;
The described microwave oven being provided with gac and/or ceramic membrane filter core is provided with water out up to standard.
According to system of the present invention, described microwave heating appts comprises casing, tubular type cavity, microwave catheter and microwave source;
Described tubular type cavity is the tubular type cavity be made up of pottery or glass, and described casing is the casing be made up of 304 or 316 stainless steels.
According to system of the present invention, described in be provided with gac and/or ceramic membrane filter core microwave oven comprise gac and/or ceramic membrane filter core, cartridge type cavity, microwave catheter, microwave source and casing;
Described cartridge type cavity is the cartridge type cavity be made up of pottery or glass, and described casing is the casing be made up of 304 or 316 stainless steels.
According to system of the present invention, the conventional equipment that on-line mixing device wherein used, microwave heating appts, centrifugal separating device and the microwave oven being provided with gac and/or ceramic membrane filter core all can use for this area, in the preferred embodiment of the present invention, described centrifugal separating device can be spiral centrifugal separating device, butterfly centrifugal tripping device or whirlwind-type centrifugal separating device;
And the rotating speed of described centrifugal separating device is adjustable at 0-6000rpm, separating factor is 1000-10000.
Method provided by the present invention has simple and reliable, strong operability, system stability, and cost is low, processes quick, effective and is easy to the plurality of advantages such as popularization.After discharge opeing is returned in method process acidifying provided by the invention, crude oil water content is less than 1%, and in the water after process, oil-containing is less than 0.3%, and concentration of suspension is less than 30ppm, and it can be used as stratum reinjected water.
Accompanying drawing explanation
Fig. 1 returns discharge opeing fast processing system schematic for the oil and water well acidifying that the embodiment of the present invention 1 provides;
Fig. 2 returns discharge opeing fast processing system microwave heating appts structural representation used for the oil and water well acidifying that the embodiment of the present invention 1 provides;
Fig. 3 returns the used microwave oven schematic diagram being provided with gac and/or ceramic membrane filter core of discharge opeing fast processing system for the oil and water well acidifying that the embodiment of the present invention 1 provides.
Main Reference label declaration:
1, pump;
2, on-line mixing device;
3, microwave heating appts;
4, centrifugal separating device;
5, the microwave oven of gac and/or ceramic membrane filter core is provided with;
6, the microwave cavity of microwave heating appts;
7, the microwave catheter of microwave heating appts;
8, the microwave source of microwave heating appts;
9, the microwave enclosure of microwave heating appts;
10, gac and/or ceramic filtration membrane filter core;
11, the microwave cavity of the microwave oven of gac and/or ceramic membrane filter core is provided with;
12, the microwave catheter of the microwave oven of gac and/or ceramic membrane filter core is provided with;
13, the microwave enclosure of the microwave oven of gac and/or ceramic membrane filter core is provided with;
14, the microwave source of the microwave oven of gac and/or ceramic membrane filter core is provided with.
Embodiment
In order to there be understanding clearly to technical characteristic of the present invention, object and beneficial effect, now in conjunction with following specific embodiment and Figure of description, following detailed description is carried out to technical scheme of the present invention, but can not be interpreted as to of the present invention can the restriction of practical range.
Embodiment 1
Present embodiments provide a kind of oil and water well acidifying and return discharge opeing fast processing system, wherein, the schematic diagram of this system as shown in Figure 1, as can be seen from Figure 1, it comprises pump 1, on-line mixing device 2, microwave heating appts 3, centrifugal separating device (butterfly centrifugal separator) 4, is provided with the microwave oven 5 of gac and/or ceramic membrane filter core; The downstream of described on-line mixing device 2 is connected with microwave heating appts 3, the microwave oven 5 that is provided with gac and/or ceramic membrane filter core respectively by pipeline;
Described microwave heating appts 3 is connected with the microwave oven 5 being provided with gac and/or ceramic membrane filter core via centrifugal separating device 4 by pipeline;
On pipeline on pipeline on pipeline between on-line mixing device 2 and microwave heating appts 3, between on-line mixing device 2 and the microwave oven 5 being provided with gac and/or ceramic membrane filter core, between centrifugal separating device 4 and the microwave oven 5 being provided with gac and/or ceramic membrane filter core, be equipped with valve;
Described pump 1 is pump into pump in on-line mixing device 2 for acidifying being returned discharge opeing;
The upstream of described on-line mixing device 2 is provided with pending acidifying and returns discharge opeing entrance;
Described centrifugal separating device 4 is provided with crude exports;
The described microwave oven 5 being provided with gac and/or ceramic membrane filter core is provided with water out up to standard;
Described microwave heating appts comprises microwave enclosure 9, tubular type microwave cavity 6, microwave catheter 7 and microwave source 8; The structural representation of this microwave heating appts as shown in Figure 2;
Described tubular type microwave cavity 6 is the tubular type cavity be made up of pottery or glass, and described microwave enclosure 9 is the casing be made up of 304 or 316 stainless steels.
The described microwave oven being provided with gac and/or ceramic membrane filter core comprises gac and/or ceramic membrane filter core 10, cartridge type microwave cavity 11, microwave catheter 12, microwave source 14 and microwave enclosure 13; This is provided with the structural representation of the microwave oven of gac and/or ceramic membrane filter core as shown in Figure 3;
Described cartridge type microwave cavity 11 is the cartridge type cavity be made up of pottery or glass,
Described microwave enclosure 13 is the casing be made up of 304 or 316 stainless steels.
Embodiment 2
Present embodiments provide a kind of oil and water well acidifying and return discharge opeing immediate processing method, it is that the system adopting embodiment 1 to provide realizes, and wherein, the method comprises the following steps:
Offshore oilfield oil well adopts the HCl acidifying of 12%, with 10m after acidifying
3the speed of/h returns discharge opeing, returns row with residual acid solution, by the polyox-yethylene-polyoxypropylene block copolymer emulsion splitter ZSA-BP-169 (Beijing Zhong Shi great energy technology Services Co., Ltd) of the soda ash and 15kg that add 25kg per hour to 5m
3on-line mixing device in and stir, then pump into microwave heating appts, butterfly centrifugal separator successively, act on after 50 seconds under microwave frequency 2450MHz, when rotating speed is 4000rpm, by profit centrifugation, obtain crude oil and water; Wherein the moisture crude oil lower than 1% enters oil pipeline, and isolated oily(waste)water enters the microwave oven being provided with gac and ceramic membrane composite filter element, and the filtrate obtained after filtration can directly enter re-injection pipeline as stratum reinjected water;
Described gac is the mixed active charcoal of granularity between 8-30 order, and the aperture of ceramic membrane is 10 μm.
Carry out microwave heating treatment to the microwave oven being provided with gac and ceramic membrane composite filter element with 915MHz frequency again, when temperature rises to 100 DEG C, the water in filter residue becomes water vapor; When being warmed up to 300-500 DEG C, the organism generation pyrolysis such as the greasy dirt in filter residue and acidizing additive become pyrolysis gas and trace Jiao (solid phase); After being warmed up to 700-800 DEG C (temperature rise rate is 50 DEG C/min), stop 3 minutes; In microwave processing process, the tamper be trapped in ceramic membrane can be removed, and after being warmed up to 650 DEG C, gac will be recycled by activating.And optionally with clear water back flushing or directly come into operation again.
Embodiment 3
Present embodiments provide a kind of oil and water well acidifying and return discharge opeing immediate processing method, it is that the system adopting embodiment 1 to provide realizes, and wherein, the method comprises the following steps:
Offshore oilfield well adopts the HBF of the HCl+5% of 8%
4acidifying, with 8m after acidifying
3the speed of/h returns discharge opeing, returns row, by the 40kg sodium hydroxide that adds per hour in 4m with residual acid solution
3on-line mixing device in and stir, obtain pretreated acidifying and return discharge opeing; Then return discharge opeing and pump into obtaining pretreated acidifying the microwave oven being provided with active carbon filter core, the filtrate obtained after filtration can directly enter re-injection pipeline as stratum reinjected water;
Described gac is the mixed active charcoal of granularity between 8-30 order.
Carry out microwave heating treatment to the microwave oven being provided with active carbon filter core with 915MHz frequency again, when temperature rises to 100 DEG C, the water in filter residue becomes water vapor; When being warmed up to 350 DEG C, the organism generation pyrolysis such as the greasy dirt in filter residue, acidizing additive become small-molecule substance (gas phase) and residue; Pyrolytic process is continued until 460 DEG C, and the pyrolytic reaction time is 7 minutes; Simultaneously hierarchy of control temperature rises to 460 DEG C of times used from room temperature is 9min, and the small-molecule substance that pyrolysis obtains discharges on the spot or is oxidized to carbonic acid gas on the spot and water emits.Continue to be warming up to 800 DEG C, continue 2 minutes, gac is activated, and directly comes into operation with after clear water back flushing again.
Embodiment 4
Present embodiments provide a kind of oil and water well acidifying and return discharge opeing immediate processing method, it is that the system adopting embodiment 1 to provide realizes, and wherein, the method comprises the following steps:
Onshore oil field oil well adopts the HF acidifying of the HCl+3% of 12%, with 5m after acidifying
3the speed of/h returns discharge opeing, and return row with residual acid solution, add 20kg caustic soda potassium hydroxide by per hour, the polyox-yethylene-polyoxypropylene block copolymer emulsion splitter ZSA-BP169 (production of Beijing Zhong Shi great energy technology Services Co., Ltd) of 16kg is in 4m
3on-line mixing device in and stir, then enter microwave heating appts, butterfly centrifugal tripping device successively, under microwave frequency 2450MHz act on 1.5 minutes, when rotating speed is 2000rpm, profit is carried out centrifugation, obtains crude oil and water; Wherein water ratio lower than 1% crude oil enter oil pipeline, the water deviate from enters the microwave oven being provided with gac and ceramic membrane composite filter element, and the filtrate obtained after filtration can directly enter re-injection pipeline as stratum reinjected water;
Described gac is the mixed active charcoal of granularity between 8-30 order, and the aperture of ceramic membrane is 10 μm.
Carry out microwave heating treatment to the microwave oven being provided with gac and ceramic membrane composite filter element with 915MHz frequency again, when temperature rises to 100 DEG C, the water in filter residue becomes water vapor; When being warmed up to 350 DEG C, the organism generation pyrolysis such as the greasy dirt in filter residue, acidizing additive become pyrolysis gas and trace Jiao (solid phase); Pyrolytic process is continued until 700 DEG C (temperature rise rate is 45 DEG C/min); After being warmed up to 700 DEG C, stop 5 minutes.In microwave processing process, the tamper be trapped in ceramic membrane can be removed, and after being warmed up to 650 DEG C, gac will be activated.And optionally with clear water back flushing or directly come into operation again.
Embodiment 5
Present embodiments provide a kind of oil and water well acidifying and return discharge opeing immediate processing method, it is that the system adopting embodiment 1 to provide realizes, and wherein, the method comprises the following steps:
Onshore oil field oil well adopts 5%HCl+8%H
2bF
4acidifying, with 10m after acidifying
3the speed of/h returns discharge opeing, and return row with residual acid solution, by the caustic soda potassium hydroxide adding 170kg per hour, the magnesium sulfate emulsion splitter of 200kg, the HEDP of 50kg is in 5m
3on-line mixing device in and stir, then enter microwave heating appts, butterfly centrifugal tripping device successively, under microwave frequency 915MHz act on 2 minutes, when rotating speed is 4000rpm, profit is carried out centrifugation, obtains crude oil and water; Wherein water ratio lower than 1% crude oil enter oil pipeline, the water deviate from enters the microwave oven being provided with gac and ceramic membrane composite filter element, and the filtrate obtained after filtration can directly enter re-injection pipeline as stratum reinjected water;
Described gac is the mixed active charcoal of granularity between 8-30 order, and the aperture of ceramic membrane is 10 μm.
Carry out microwave heating treatment to the microwave oven being provided with gac and ceramic membrane composite filter element with 915MHz frequency again, when temperature rises to 120 DEG C, the water in filter residue becomes water vapor completely and evaporates; When being warmed up to more than 300 DEG C, the organism generation pyrolysis such as the greasy dirt in filter residue, acidizing additive become pyrolysis gas and trace Jiao (solid phase); After being warmed up to 700 DEG C (temperature rise rate is 50 DEG C/min), stop 3 minutes, in microwave processing process, the tamper be trapped in ceramic membrane can be removed, and after being warmed up to 650 DEG C, gac will be activated.And optionally with clear water back flushing or directly come into operation again.
Claims (10)
1. a discharge opeing immediate processing method is returned in acidifying, and wherein, described acidifying is returned discharge opeing and comprised well acidifying and return discharge opeing or oil well acidation returns discharge opeing;
Return discharge opeing for well acidifying, the method comprises the following steps:
A, to return in discharge opeing to well acidifying and add alkali to carry out neutralization reaction, after reaction terminates, obtain pretreated acidifying and return discharge opeing;
B, use gac and/or ceramic membrane return discharge opeing to pretreated acidifying and carry out filtration treatment, and filter residue is attached on gac and/or ceramic membrane, and filtrate is the stratum up to standard reinjected water after process;
After c, filtration terminate, microwave-heating process is carried out to the gac and/or ceramic membrane that are attached with filter residue, it is made to be warming up to the target temperature of 300-1400 DEG C, wherein, controlling to be attached to the temperature rise rate that the filter residue on gac and/or ceramic membrane rises to target temperature from room temperature is 3-100 DEG C/min, and the residence time controlled after filter residue is warming up to target temperature is 1-30min;
In microwave heating treatment process, the organism in filter residue is by pyrolysis;
Return discharge opeing for oil well acidation, the method comprises the following steps:
A, to return in discharge opeing to oil well acidation and add alkali, emulsion splitter and complexing agent successively, stir, obtain pretreated acidifying and return discharge opeing;
B, discharge opeing is returned to described pretreated acidifying carrying out microwave treatment, centrifugation, isolating crude oil from returning discharge opeing;
C, use gac and/or ceramic membrane carry out filtration treatment to isolating the discharge opeing of returning after crude oil, and filter residue is attached on gac and/or ceramic membrane, and filtrate is the stratum up to standard reinjected water after process;
After D, filtration terminate, microwave heating treatment is carried out to the gac and/or ceramic membrane that are attached with filter residue, it is made to be warming up to the target temperature of 300-1400 DEG C, wherein, controlling to be attached to the temperature rise rate that the filter residue on gac and/or ceramic membrane rises to target temperature from room temperature is 3-100 DEG C/min, and the residence time controlled after filter residue is warming up to target temperature is 1-30min;
Organism in microwave heating treatment process in filter residue is by pyrolysis.
2. method according to claim 1, wherein, the microwave treatment time described in step B is no less than 30s.
3. method according to claim 1, wherein, centrifugation rate centrifugal described in step B is not less than 1000rpm, and centrifugation time is not less than 5min.
4. method according to claim 1, wherein, for shaking out, discharge opeing is returned in well acidifying, and the method also comprises step a1: return discharge opeing to described pretreated acidifying and carry out microwave treatment, centrifugal clarification process, wherein, step a1 occurs between described step a and described step b;
Preferred described microwave treatment time is no less than 30s;
Also preferred described centrifugal centrifugation rate is not less than 1000rpm, and centrifugation time is not less than 5min.
5. method according to claim 1, wherein, returns in discharge opeing to acidifying and adds alkali until system is neutral substantially;
Described alkali comprises sodium carbonate, sodium bicarbonate, sodium hydroxide, potassium hydroxide, salt of wormwood, saleratus, milk of lime or unslaked lime.
6. method according to claim 1, wherein, returns in discharge opeing to oil well acidation and adds emulsion splitter and reach more than 90% to make the breaking emulsion and dewatering rate of system;
Described emulsion splitter comprises the combination of one or more in ammonium chloride-Sodium Nitrite, aluminum chloride, the vitriol oil, magnesium sulfate, magnesium iron mixture and polyox-yethylene-polyoxypropylene block copolymer.
7. method according to claim 1, wherein, to oil well acidation return in discharge opeing add complexing agent to make calcium in system, the chelation percent of magnesium ion reaches 100%;
Described complexing agent comprises hydroxy ethylidene-diphosphate, ethylenediamine tetraacetic acid (EDTA), aminotrimethylene phosphoric acid or divinyl triammonium pentamethylene phosphoric acid.
8. the method according to any one of claim 1-7, wherein, when described well acidifying returns that in discharge opeing, oleaginousness is greater than 5v%, first need to carry out pre-sedimentation separating treatment to it, after separation terminates, return discharge opeing to the aqueous phase being positioned at bottom according to described well acidifying again to process, according to described oil well acidation, discharge opeing is returned to superposed oil phase and processes;
When described oil well acidation returns that in discharge opeing, water content is greater than 70v%, first need to carry out pre-sedimentation separating treatment to it, after separation terminates, then according to described well acidifying, discharge opeing is returned to the aqueous phase being positioned at bottom process, according to described oil well acidation, discharge opeing is returned to superposed oil phase and processes.
9. return a system for discharge opeing immediate processing method for the acidifying realized described in any one of claim 1-8, this system comprises online mixing tank, microwave heating appts, centrifugal separating device and is provided with the microwave oven of gac and/or ceramic membrane filter core;
The downstream of described on-line mixing device is connected with microwave heating appts, the microwave oven that is provided with gac and/or ceramic membrane filter core respectively by pipeline;
Described microwave heating appts is connected with the microwave oven being provided with gac and/or ceramic membrane filter core via centrifugal separating device by pipeline;
On pipeline on pipeline on pipeline between on-line mixing device and microwave heating appts, between on-line mixing device and the microwave oven being provided with gac and/or ceramic membrane filter core, between centrifugal separating device and the microwave oven being provided with gac and/or ceramic membrane filter core, be equipped with valve.
10. system according to claim 9, wherein, the upstream of described on-line mixing device is provided with pending acidifying and returns discharge opeing entrance;
Described centrifugal separating device is provided with crude exports;
The described microwave oven being provided with gac and/or ceramic membrane filter core is provided with water out up to standard.
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