CN104234674B - Method and device for microbial oil displacement output liquid circulation and ground fermentation - Google Patents
Method and device for microbial oil displacement output liquid circulation and ground fermentation Download PDFInfo
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Abstract
The invention relates to a method and a device for microbial oil displacement output liquid circulation and ground fermentation; mixing the sewage and the nutrient in a liquid preparation pool; delivering the prepared nutrient solution to a fermentation tank filled with a production solution; the nutrient in the pot rapidly activates the beneficial flora in the output liquid; the fermentation liquor from the fermentation tank enters a secondary sedimentation tank, the temperature is 45-50 ℃, the sewage sedimentation time is 1-2 h, and the thalli continue to grow and reproduce under the condition; filtering the fermentation liquor in the secondary settling tank by a primary filter and a secondary filter, and removing residual oil in the reinjection water; the fermentation liquor enters a sewage storage tank, the temperature is 40-45 ℃, and the storage time is 1-2 h; injecting the fermentation liquor into each broken block water well; the method activates beneficial flora in the produced liquid, increases the concentration of thalli by 2-3 orders of magnitude, inhibits the growth of harmful flora, and achieves the viscosity reduction rate of 31.9 percent through the action of microorganisms on crude oil.
Description
Technical field
The present invention relates to the circulation of a kind of microbial oil displacement production fluid and ground fermentation process and circulation with
The device of fermentation.
Background technology
Microbial Enhanced Oil Recovery is one of technological means of current oil field at home enforcement tertiary oil recovery.
The prerequisite implementing microbe oil production is to set up stable microbiological field inside oil reservoir.Make
Microorganism keeps stable in the earth formation, it is necessary to provide enough growing spaces and nutrient substance for it.
Oil field at home reservoir condition, general employing single well stimulation or microorganism are driven, and directly note to stratum
Enter nutrient substance and bacterium solution, it is ensured that the activity of flora, make to be that reservoir formation cell concentration maintains
105～106Individual/about ml.
Having been set up stable microbiological field inside each fault block oil reservoir in Bao Lige oil field, thalline is dense
Degree maintains 105～106Individual/ml, premise bar is set up in the deep development for Microbial Enhanced Oil Recovery
Part.Microorganism, as a kind of life entity, has himself growth and death process, and stratum is set up
The purpose of microbiological field is the activity in order to keep beneficial microbe colony so that it is the most not
Disconnected growth and breeding, makes thalline the most closely link up, and real performance microorganism is adopted
Oil tech is as the advantage of " life entity ".After setting up microbiological field, next step just should
The method that this research stabilised microorganism field extends its action time.Microorganism to be made is protected in the earth formation
Keep steady and its enough growing spaces of offer and nutrient substance is provided surely, actual according to produced on-site,
Microbes in stratum constantly produces along with oil well and is plucked out of, the profitable strain in stratum
The nutrient substance not being consumed enters multi-purpose station with Produced Liquid.The flora that these are plucked out of passes through
Stratum screening has been already adapted to the environment of oil reservoir, it is possible to stably grow on stratum, it is possible to use this
It is already adapted to the external source bacterium of oil reservoir a bit as endogenous bacterium, activates Produced Liquid by ground fermentation technology
In cell concentration.Improve micro-drive effect to save micro-cost that drives, it is ensured that microorganism is on stratum
In efficient breeding, sewage treatment process in multi-purpose station and re-injection technique have been carried out research.Grind
Study carefully confirmation current process technique the profitable strain in Produced Liquid is not affected, micro-flooding produced liquid
Re-injection can make the profitable strain in stratum cover oil reservoir.Although produced-water reinjection can make output
Profitable strain and remaining nutrient substance be recycled into stratum, but constantly disappearing due to nutrient substance
Consumption is simple relies on produced-water reinjection extra-nutrition material and strain the most in good time, and the microbiological field on stratum is also
It is difficult to effectively be bred, thus and crude oil interaction raising recovery ratio.Rely on the most micro-
Drive method directly to stratum extra-nutrition agent, although oil reservoir cell concentration can be maintained, but difficult
So that the dense breakthrough of bacterium 106Individual/ml.
Summary of the invention
It is an object of the invention to: a kind of microbial oil displacement production fluid circulation and ground fermentation side are provided
Method and device, effectively utilize present in microbial oil displacement Produced Liquid profitable strain and be not consumed
Nutrient substance, it is ensured that microorganism efficient breeding in the earth formation, make the flora re-injection after activation
Stratum, can save micro-drive cost with the microbiological field of continuous and effective so that stratum forms one
Improve micro-effect of driving, reduce microbial oil displacement cost.
Microbial oil displacement production fluid of the present invention circulation and ground installation for fermenting, including: control
Penstock, 25m3Dosing pond, agitator, jet pump, effusion meter, Pressure gauge, ball-and-seat
Door, three phase separator, fermentation tank, two grades of settling tanks, regulation tank, filter, pipeline and dirt
Water storage tank；
Dosing water pipeline one end of device is connected to sewage by feed liquor total valve and feed liquor water pump and stores up
In the back with water inlet line of tank, the other end of dosing water pipeline is respectively with dosing pond A's and dosing pond B
Import is connected, and is separately installed with agitator A and agitator B in two dosing ponds；Two dosings
Pond import is separately installed with water control valve A and water control valve B, and the outlet in two dosing ponds is passed through
Water control valve C and water control valve D, dosing pipeline A, water control valve E and water control valve F divide
Not being connected with the import of jet pump A and jet pump B, two jet delivery side of pump are through dosing pipeline
B and effusion meter A and effusion meter B import are connected, and the import and export at effusion meter are parallel with water control valve
Door G and water control valve H；The outlet of effusion meter A is by dosing pipeline C and single current valve A
It is connected on water injecting pump；The outlet of effusion meter is connected to by dosing pipeline D and single current valve A
In the inlet line of fermentation tank, dosing pipeline D is provided with Pressure gauge；Three phase separator one end
Being connected with produced liquid in oil well, the other end is connected with fermentation tank and mummifying pool respectively；Fermentation tank, two
Level settling tank, regulation tank, filter A, filter B, sewage storage tank 17 are sequentially connected with, dirty
The outlet at bottom of water storage tank is connected with water injecting pump.
Above-mentioned valve is connected as threadeding with pipeline.
Summary microbial oil displacement production fluid circulation and the operation principle of ground installation for fermenting.Refering to figure
1. microorganism drives dosing water from sewage storage tank out, by feed liquor total valve and feed liquor water pump edge
Dosing water pipeline, enters dosing pond A and dosing pond B by water control valve A and water control valve B,
Concentration according to adding nutritional solution configures nutritional solution in dosing pond A and dosing pond B；By stirring
Device A and agitator B stirs, and two dosing ponds replace dosing.The nutritional solution configured by
Water control valve C and water control valve D, dosing pipeline A, water control valve E and water control valve F divide
Not Jin Ru jet pump A and jet pump B, by dosing pipeline B, effusion meter A, dosing pipeline
C, water injecting pump inject target zone.Dosing pipeline B is entered by effusion meter, dosing pipeline D and sends out
In ferment tank.Produced liquid in oil well is oil-water separation when heated 50 DEG C～60 DEG C in three phase separator,
Crude oil exporting, sewage enters in fermentation tank, and fermentation tank outer wall is provided with thermal insulation layer can make water therein
Temperature is maintained at 45～50 DEG C, dwell time of sewage 8～12h, and it is raw that this temperature and time is suitable for thalline
Long breeding.Therefore, the profitable strain in fermentation tank (one-level settling tank) is in nutrient substance effect
Under can mushroom out breeding arrival 2.5 × 108～9.8 × 108Individual/ml, the thalline that ground is activated
Enter sewage storage tank through two grades of settling tanks, filter A, filter B, be then passed through water filling
Pump group injects target zone.Suitable by dosing pipeline C according to testing result injecting before purpose stratum
Extra-nutrition agent, magnitude of recruitment is controlled by effusion meter A, provides for the thalline growth and breeding on stratum
Nutritional substrate.
The circulation of microbial oil displacement production fluid and ground fermentation process:
Utilize the sewage of sewage storage tank at the circulation of microbial oil displacement production fluid and ground installation for fermenting
In two dosing ponds configure nutritional solution, nutritional solution stir after through jet pump, effusion meter and
Respective lines enters settling tank.Utilize the fermentation tank that settling tank ferments as ground, activate sewage
In profitable strain, dense to improve the overall bacterium of return water.Finally micro-the driving after fermentation is adopted
Go out liquid and be recycled into oil field, it is achieved micro-flooding produced liquid ground, oil field fermentation Posterior circle utilizes, and increases micro-
Biological oil displacement efficiency.Comprise the concrete steps that:
Step A: the sewage in sewage storage tank after multi-purpose station process enters under intake pump effect
Dosing pond, water temperature 40 DEG C～45 DEG C；
Step B: the concentration according to adding nutritional solution adds nutrient in dosing pond, and utilization is stirred
Mixing device to be stirred, until nutritional solution is uniform, agitator speed, 300～500r/min, stirs
Mix time 2h, to solution, there is no solid particle；
Step C: open the single current valve on the water control valve corresponding with dosing pond, pipeline, open
Dynamic jet pump, the nutritional solution configured is transported to fermentation tank, nutritional solution under the control of effusion meter
Injection rate determines according to the pond number of nutrient concentration, the total amount of return water and nutrient solution；
Dosing pond prepare nutritional solution start inject during, start dosing in the dosing of dosing pond.
Two dosing ponds replace dosing, it is ensured that nutrient fully dissolves.
Step D: the nutritional solution configured enters fermentation tank, and in tank, temperature maintains 45 DEG C～50
DEG C, the sewage sedimentation time is 8～12h, and the nutrient screened under this condition can produce by acute activation
Go out the profitable strain in liquid: hydrocarbon oxidation bacteria is by 2.1 × 106Individual/ml increases to 2.5 × 108Individual/ml,
Zymocyte is by 2.2 × 105Individual/ml increases to 9.5 × 108Individual/ml, denitrifying bacteria are by 1.1 × 104
Individual/ml increases to 3.5 × 108Individual/ml, pernicious bacteria sulfate reduction bacteria concentration≤10/ml；
Step E: fermentation liquid out enters two grades of settling tanks, sewage storage tank temperature from fermentation tank
Degree maintains 45 DEG C～50 DEG C, and the sewage sedimentation time is 1～2h, and thalline can continue under this condition
Continuous growth and breeding.
Step F: fermentation liquor grade one filter and secondary filter in two grades of settling tanks filter
After, remove the residual oil in reinjected water further, grade one filter filtrate is walnut shell, aperture
0.28mm, secondary filter filtrate quartz sand+magnetic iron ore, aperture 0.25mm, filtration temperature is 40
DEG C～45 DEG C；
Step G: the fermentation liquid after double-filtration enters sewage storage tank, and temperature is 40 DEG C～45
DEG C, the storage time is 1～2h；
Step H: the fermentation liquid in last sewage storage tank is injected into each disconnected by multi-purpose station water injecting pump group
Block well, it is achieved after the fermentation of micro-flooding produced liquid ground, Posterior circle injects, injects that bacterium is dense is not less than
5.0×108Individual/ml.
By above-mentioned steps, the nutrient infusion sewage precipitation tank that will have configured, sewage is utilized to exist
Sedimentation time (8～12h), settling temperature (45～50 DEG C) in settling tank are sent out as thalline
The condition of ferment, makes settling tank become ground fermentation tank.By microorganism liquid mixing system technological process
The activator of screening, profitable strain in acute activation Produced Liquid is added in settling tank.By it
In the growth and breeding of denitrifying bacteria, utilize the method that biological competition is eliminated, improve denitrification
The Ecological niche of antibacterial, reduces the Ecological niche of sulfate reducting bacteria, makes sulfate reducting bacteria lose former
Some sulfate reduction functions, no longer carry out sulfate reduction, thus suppress sulfate also
The growth and breeding of former bacterium.Profitable strain concentration reaches 2.5 × 108～9.8 × 108The high bacterium of individual/ml
Dense, pernicious bacteria sulfate reduction bacteria concentration≤10/ml, then it is recycled into stratum and realizes micro-life
Thing drives recycling of production fluid and maintains stratum microbiological field.Meanwhile, supplement in right amount before re-injection
Nutrient is as the nutritional substrate of thalline stratum growth and breeding, it is to avoid inject nutrient in stratum
With the dilution problem occurred during bacterium solution.
Beneficial effects of the present invention: microbial oil displacement production fluid of the present invention circulation and ground fermentation side
Method, it is possible to effectively activate the profitable strain in sewage, cell concentration increases by 2～3 orders of magnitude,
Suppress pernicious bacteria simultaneously, reach 31.9% by microbial action reduction rate of crude oil viscosity.Microorganism
The circulation of displacement of reservoir oil production fluid and ground installation for fermenting, on-the-spot operation management is easy, does not affect existing
Waste water processes.The circulation of microbial oil displacement production fluid can realize micro-life with ground fermentation process
Thing injects after driving production fluid reactivation and utilizes, and raising body layer microbiological field bacterium is dense, reduces microorganism
Displacement of reservoir oil production cost.
Can be drawn by logistics organizations, microorganism is driven and is recycled ground fermentation technology on ground
Can effectively activate profitable strain in stratum, it is to avoid the most micro-drive during nutritional solution exist dilution
It is unfavorable for the shortcoming that stratum thalline activates.Meanwhile, suitably supplement the nutrients before injecting stratum agent,
Can be the thalline growth and breeding in the earth formation after activating and and the battalion of crude oil interaction offer abundance
Supporting substrate, give full play to thalline and improve the effect of oil recovery factor, oil recovery factor can drive micro-
On the basis of improve 14.21 percentage points.
Accompanying drawing explanation
Fig. 1 microorganism is driven production fluid and is recycled ground installation for fermenting schematic diagram.
Fig. 2 microorganism is driven production fluid and is recycled ground ferment effect figure.
In figure, 1.1 water control valve A, 1.2 water control valve B, 1.3 water control valve C, 1.4 water control valves
Door D, 1.5 water control valve E, 1.6 water control valve F, 1.7 water control valve G, 1.8 water control valve H, 1.9
Feed liquor total valve, 2.1. dosing pond A, 2.2. dosing pond B, 3.1. agitator A, 3.2. stir
Device B, 4.1. jet pump A, 4.2. jet pump B, 4.3 intake pumps, 5.1. effusion meter A,
5.2. effusion meter B, 6. Pressure gauge, 7.1 single current valve A, 7.2. single current valve B, 8. three-phase
Separator, 9. fermentation tank, 10. two grades of settling tanks, 11.1 filter A, 11.2 filter B,
12. dosing water pipelines, 13. dosing pipeline A, 14 dosing pipeline B, 15 dosing pipeline C, 16. join
Liquid pipeline D, 17. sewage storage tanks, 18 regulation tanks, 19 mummifying pools, 20 water injecting pumps.
Detailed description of the invention
Microbial oil displacement production fluid of the present invention circulation and ground installation for fermenting, including: control
Penstock, 25m3Dosing pond, agitator, jet pump, effusion meter, Pressure gauge, ball-and-seat
Door, three phase separator, fermentation tank, two grades of settling tanks, regulation tank, filter, pipeline and dirt
Water storage tank；
Dosing water pipeline 12 one end of device is connected by feed liquor total valve 1.9 and feed liquor water pump 4.3
Be connected in the back with water inlet line of sewage storage tank 17, the other end of dosing water pipeline 12 respectively with dosing
Pond A2.1 is connected with the import of dosing pond B2.2, is separately installed with agitator in two dosing ponds
A3.1 and agitator B3.2；Two dosing pond imports are separately installed with water control valve A1.1 and control
Penstock B1.2, the outlet in two dosing ponds by water control valve C1.3 and water control valve D1.4,
Dosing pipeline A13, water control valve E1.5 and water control valve F1.6 respectively with jet pump A4.1 and
The import of jet pump B4.2 connects, and two jet delivery side of pump are through dosing pipeline B14 and flow
Meter A5.1 and effusion meter B5.2 import connect, and the import and export at effusion meter are parallel with water control valve
G1.7 and water control valve H1.8；The outlet of effusion meter A5.1 is by dosing pipeline C15 and single current
Valve A7.1 is connected on water injecting pump 20；The outlet of effusion meter 5.2 is by dosing pipeline 16D
It is connected in the inlet line of fermentation tank 9 with single current valve A7.2, dosing pipeline D16 pacifies
Equipped with Pressure gauge 6；Three phase separator 8 one end is connected with produced liquid in oil well, the other end respectively with
Fermentation tank 9 and mummifying pool connect；9, two grades of settling tanks 10 of fermentation tank, regulation tank 18, filtration
Device A11.1, filter B 11.2, sewage storage tank 17 are sequentially connected with, the bottom of sewage storage tank 17
Outlet is connected with water injecting pump 20.
Embodiment 1:
Dosing pool volume 25m in technological process3, the motor of agitator connection in each dosing pond
For threephase asynchronous；Water control valve is flange Middle pressure valve nominal diameter 50mm；Flow
Meter uses electromagnetic flowmeter, and range ability is 0.125～6000m3/h；Pipeline is pvc pipe line,
Internal diameter 50mm, 5mm after tube wall, pressure-bearing 5MPa；
Microorganism drives dosing water from sewage storage tank 17 out, by feed liquor total valve 1.9 with enter
Liquid water pump 4.3, along dosing water pipeline 12, is entered by water control valve A1.1 and water control valve B1.2
Enter dosing pond A2.1 and dosing pond B2.2, according to adding the concentration of nutritional solution at dosing pond A2.1
With configuration nutritional solution in the B2.2 of dosing pond；Stirred by agitator A3.1 and agitator B3.2,
Two dosing ponds replace dosing.The nutritional solution configured is by water control valve C1.3 and water control valve
D1.4, dosing pipeline A13, water control valve E1.5 and water control valve F1.6 respectively enter jet
Pump A4.1 and jet pump B4.2, by dosing pipeline B14, effusion meter A5.1, dosing pipeline
C15, water injecting pump 20 inject in well.Dosing pipeline B14 passes through effusion meter 5.2, dosing pipeline
16 enter in fermentation tank 9.Produced liquid in oil well in three phase separator 8 heated 50 DEG C～60
DEG C time oil-water separation, crude oil exporting, sewage enters in fermentation tank 9, and fermentation tank 9 outer wall is provided with
Thermal insulation layer can make water temperature therein be maintained at 45～50 DEG C, dwell time of sewage 8～12h, this temperature
Degree and time are suitable for thalli growth breeding.Therefore, having in fermentation tank (one-level settling tank) 9
Bacteria group can mushroom out breeding arrival 2.5 × 10 under nutrient substance effect8～9.8 × 108
Individual/ml, the thalline that ground is activated enters through two grades of settling tanks 10, defecator 11.1 and 11.2
Enter sewage storage tank, be then passed through water injecting pump group and inject target zone.Basis before injecting purpose stratum
Testing result is suitably supplemented the nutrients agent by dosing pipeline C15, and magnitude of recruitment is controlled by effusion meter A5.1
System, provides nutritional substrate for the thalline growth and breeding on stratum.
Produced liquid in oil well in three phase separator 8 heated 50 DEG C～60 DEG C make oil-water separation, former
Oil is outer defeated, and sewage enters in fermentation tank 9, and fermentation tank 9 outer wall is provided with thermal insulation layer can be made therein
Water temperature is maintained at 40～50 DEG C, and dwell time of sewage 8～12h, this temperature and time is suitable for sewage
In thalli growth breeding.Profitable strain in fermentation tank 9 can be fast under nutrient substance effect
Speed growth and breeding arrives 2.5 × 108～9.8 × 108Individual/ml, the thalline that ground is activated is through two grades
Settling tank 10, filter A11.1 and filter B 11.2 enter sewage storage tank, are then passed through note
Water pump group injects target zone.According to testing result by dosing pipeline C15 before injecting purpose stratum
Suitably Additional nutrient solution, magnitude of recruitment is controlled by effusion meter A, for the thalline growth and breeding on stratum
Nutritional substrate is provided.
The circulation of embodiment 2 microbial oil displacement production fluid and ground fermentation process
As a example by Bao Lige rejection of oil flied effluent system, this oilfield production fluid is at three line separators
Carry out oil-water separation, the crude oil exporting after dehydration, sewage then through sewage precipitation tank, two grades sink
Fall tank, surge tank and filtering tank, cascade filtration tank, sewage storage tank are removed residual oil and hang
Two fault blocks in oil field it are recycled into after float.The whole sewage disposal time is 8-12h, mainly stops
Staying the time is at sewage precipitation tank, and treatment temperature is 45 DEG C～50 DEG C.
First the device flow process (embodiment 1) designed by the present invention is installed in parallel before enforcement at connection
Close on the waste water processes at station:
Liquid mixing system: dosing pool volume 25m3, each dosing pond is with two agitators, agitator
The motor connected is threephase asynchronous；Ground installation for fermenting water control valve is flange middle pressure valve
Door nominal diameter 50mm；Electromagnetic flowmeter, range ability is 0.125～6000m3/h；Pipe
Line is pvc pipe line, internal diameter 50mm, 5mm after tube wall, pressure-bearing 5MPa；
Sewage disposal system: three phase separator 1000m3, fermentation tank (sewage precipitation tank) 2000m3,
Single filter tank is walnut shell filtering material, and cascade filtration tank is that quartz sand adds magnetic iron ore filtrate, sewage
Handling process temperature range 40～55 DEG C, sewage load≤2500m3/d。
Implementing step is:
Step A: in multi-purpose station sewage storage tank 17 process after sewage as dosing water at jet pump
4.3 effects are lower enters dosing pond 2.2, water temperature 40 DEG C～45 DEG C；
Step B: the concentration according to adding nutritional solution adds nutrient in dosing pond 2.2, profit
It is stirred with agitator 3.2, until nutritional solution is uniform.Agitator speed 300～
500r/min, mixing time 2h, to solution, there is no solid particle.
Step C: open the water control valve corresponding with dosing pond 2.2 1.4,1.6,1.8, pipeline
Single current valve 7.2 on 16, starts jet pump 4.2, and jet pump 4.1 is standby, the battalion configured
Nutrient solution is transported to fermentation tank (one-level settling tank) 9 under the control of effusion meter 5.2, and nutritional solution is noted
Enter speed to determine according to the pond number of nutrient concentration, the total amount of return water and nutrient solution.
Dosing pond 2.2 prepare nutritional solution start inject during, in dosing pond 2.1 dosing
Start dosing.Two dosing ponds replace dosing, it is ensured that nutrient fully dissolves.
Step D: the nutritional solution configured enters fermentation tank 9(one-level settling tank), temperature in tank
Maintaining 45 DEG C～50 DEG C, the sewage sedimentation time is 8～12h, the nutrition screened under this condition
Profitable strain in agent meeting acute activation production fluid: hydrocarbon oxidation bacteria is by 2.1 × 106Individual/ml increases to
2.5×108Individual/ml, zymocyte are by 2.2 × 105Individual/ml increases to 9.5 × 108Individual/ml, anti-nitre
Change antibacterial by 1.1 × 104Individual/ml increases to 3.5 × 108Individual/ml, pernicious bacteria sulfate reduction
Bacteria concentration≤10/ml；
Step E: by fermentation tank 9(one-level settling tank) in sedimentation 8～12h fermentation liquid lead
Entering two grades of settling tanks 10, temperature maintains 45 DEG C～50 DEG C, and the sewage sedimentation time is 2～3h,
Thalline may proceed to growth and breeding under this condition.
Fermentation liquor grade one filter 11.1 after step F:2～3h, in two grades of settling tanks 10
After filtering with secondary filter 11.2, remove the residual oil in reinjected water further.Single filter
Device filtrate is walnut shell, aperture 0.28mm, secondary filter filtrate quartz sand+magnetic iron ore, hole
Footpath 0.25mm, filtration temperature is 40 DEG C～45 DEG C；
Step G: fermentation liquid after double-filtration enters sewage storage tank 17, the storage time is
1-3h；
Step H: last, the fermentation liquid in sewage storage tank is injected into mesh by multi-purpose station water injecting pump group
Fault block well, it is achieved micro-flooding produced liquid ground fermentation after Posterior circle inject, inject bacterium dense the lowest
In 5.0 × 108Individual/ml.
The indoor logistics organizations of embodiment 3:
Artificial quartz sand fills rock core Φ 2.5 × 100cm(core permeability
43.5×10-3μm2, porosity 31.8%, displacement pressure: 0.2～5.8MPa, displacement velocity:
0.2ml/min).
First it is to set up microbiological field, the rock core of saturated oils is cultivated in 58 DEG C of calorstats water
After driving (formation water) extremely aqueous 85%, inject bacterium solution and nutritional solution carries out microbial oil displacement, micro-
Biological displacement process detects production fluid bacterium is dense and recovery ratio delta data, until production fluid bacterium is dense
Stopping microorganism after Wen Ding to drive, now stratum has built up microbiological field.
Next is carried out microorganism production fluid and recycles the simulation experiment of ground fermentation technology, to product
Go out liquid supplements quantitative nutrient substance and cultivate 12h at a constant temperature to activate the bacterium in production fluid
Group, is supplemented with quantitative nutrient substance before re-injection and provides nutrition for thalline growth in the earth formation
Substrate.Microorganism is driven and is recycled ground fermentation technology and can make recovery ratio on the basis of micro-driving
Brought up to 85.19% by 69.85%, increase by 15.34 percentage points.Experimental result is shown in accompanying drawing 2.
Claims (2)
1. the method that a microbial oil displacement production fluid circulation is fermented with ground, it is characterised in that:
Step A: in sewage storage tank, sewage after treatment enters dosing pond, water temperature 40 DEG C～45 DEG C under intake pump effect；
Step B: the concentration according to adding nutritional solution adds nutrient in dosing pond, utilizes agitator to be stirred, until nutritional solution is uniformly, agitator speed 300～500r/min, mixing time 2h, to solution, there is no solid particle；
Step C: open the single current valve on the water control valve corresponding with dosing pond, pipeline, starts jet pump, and the nutritional solution configured is transported to fermentation tank under the control of effusion meter；
Step D: the nutritional solution configured enters fermentation tank, and in tank, temperature maintains 45 DEG C～50 DEG C, and the sewage sedimentation time is 8～12h, the profitable strain in the nutrient acute activation production fluid screened under this condition: by hydrocarbon oxidation bacteria by 2.1 × 106Individual/ml increases to 2.5 × 108Individual/ml, zymocyte are by 2.2 × 105Individual/ml increases to 9.5 × 108Individual/ml, denitrifying bacteria are by 1.1 × 104Individual/ml increases to 3.5 × 108Individual/ml, pernicious bacteria sulfate reduction bacteria concentration≤10/ml；
Step E: fermentation liquid out enters two grades of settling tanks from fermentation tank, and temperature maintains 45 DEG C～50 DEG C, and the sewage sedimentation time is 1～2h, under this condition thalline continued growth breeding；
Step F: after fermentation liquor grade one filter in two grades of settling tanks and secondary filter filter, removes the residual oil in reinjected water further, and grade one filter filtrate is walnut shell, aperture 0.28mm, secondary filter filtrate quartz sand+magnetic iron ore, aperture 0.25mm, filtration temperature is 40 DEG C～45 DEG C；
Step G: the fermentation liquid after double-filtration enters sewage storage tank, and temperature is 40 DEG C～45 DEG C, and the storage time is 1～2h；
Step H: the fermentation liquid in last sewage storage tank is injected into each fault block well by water injecting pump group, it is achieved micro-flooding produced liquid ground fermentation Posterior circle injects, and injects bacteria concentration >=5.0 × 108Individual/ml.
2. for a device for the microbial oil displacement production fluid circulation described in claim 1 with the method for ground fermentation, including: water control valve, 25m 3Dosing pond, agitator, jet pump, effusion meter, Pressure gauge, single current valve, three phase separator, fermentation tank, two grades of settling tanks, regulation tank, filter, pipeline and sewage storage tank；It is characterized in that:
Dosing water pipeline one end of device is connected in the back with water inlet line of sewage storage tank by feed liquor total valve and feed liquor water pump, the import with dosing pond A and dosing pond B respectively of the other end of dosing water pipeline is connected, and is separately installed with agitator A and agitator B in two dosing ponds；Two dosing pond imports are separately installed with water control valve A and water control valve B, the outlet in two dosing ponds by water control valve C and water control valve D, dosing pipeline A, water control valve E and water control valve F respectively import with jet pump A and jet pump B be connected, two jet delivery side of pump are connected through dosing pipeline B and effusion meter A and effusion meter B import, and the import and export at effusion meter are parallel with water control valve G and water control valve H；The outlet of effusion meter A is connected on water injecting pump by dosing pipeline C and single current valve A；The outlet of effusion meter B is connected in the inlet line of fermentation tank by dosing pipeline D and single current valve A, and dosing pipeline D is provided with Pressure gauge；Three phase separator one end is connected with produced liquid in oil well, and the other end is connected with fermentation tank and mummifying pool respectively；Fermentation tank, two grades of settling tanks, regulation tank, filter A, filter B, sewage storage tanks are sequentially connected with, and the outlet at bottom of sewage storage tank is connected with water injecting pump.
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| CN104594862A (en) * | 2015-01-05 | 2015-05-06 | 西南石油大学 | Method of applying membrane bioreactor system to microbial oil production |
| CN105999763B (en) * | 2016-05-20 | 2018-01-23 | 天津大学 | A kind of sophorolipid fermenting organism piece-rate system and method |
| CN106121606B (en) * | 2016-08-18 | 2018-04-10 | 克拉玛依新科澳石油天然气技术股份有限公司 | Keep the method for implanting of microbial activity |
| CN116950625B (en) * | 2023-09-19 | 2023-12-26 | 克拉玛依市新易通生物科技有限公司 | Microorganism cold-position exploitation method and microorganism circulating injection and extraction system |
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| US4475590A (en) * | 1982-12-13 | 1984-10-09 | The Standard Oil Company | Method for increasing oil recovery |
| CN1164607A (en) * | 1997-05-19 | 1997-11-12 | 周祖辉 | Circulation-type microbial oil displacement and production method |
| CN1431383A (en) * | 2003-01-08 | 2003-07-23 | 中国石化胜利油田有限公司采油工艺研究院 | Injecting technique and equipments in production site for expelling oil by microbe |
| CN1995694A (en) * | 2006-01-06 | 2007-07-11 | 中国石油天然气股份有限公司 | Oil displacement method for injecting indigenous microorganisms into sewage |
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| US4475590A (en) * | 1982-12-13 | 1984-10-09 | The Standard Oil Company | Method for increasing oil recovery |
| CN1164607A (en) * | 1997-05-19 | 1997-11-12 | 周祖辉 | Circulation-type microbial oil displacement and production method |
| CN1431383A (en) * | 2003-01-08 | 2003-07-23 | 中国石化胜利油田有限公司采油工艺研究院 | Injecting technique and equipments in production site for expelling oil by microbe |
| CN1995694A (en) * | 2006-01-06 | 2007-07-11 | 中国石油天然气股份有限公司 | Oil displacement method for injecting indigenous microorganisms into sewage |
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