CN103790553B - Control method of scaling in oil well production process - Google Patents
Control method of scaling in oil well production process Download PDFInfo
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- CN103790553B CN103790553B CN201410070101.6A CN201410070101A CN103790553B CN 103790553 B CN103790553 B CN 103790553B CN 201410070101 A CN201410070101 A CN 201410070101A CN 103790553 B CN103790553 B CN 103790553B
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Abstract
The invention relates to a control method of scaling in the oil well production process, in particular to a multi-functional processing agent and agent adding process. The control method is characterized in that in the agent adding process, a designed intelligent agent adding device is connected with an oil well, multifunctional treatment agents are added in a manual impact mode, displacement is controlled by the intelligent agent adding device to carry out continuous adding and large-flow adding, and adjustment of the agent adding amount is determined by the intelligent agent adding device according to load changes of a pumping-unit pumping rod so as to ensure that production of an oil well is not affected by scaling. The involved multifunctional treatment agents comprise, by mass, 0-25% of phytic acid, 0-10% of Double tenth alkyl dimethyl quaternary ammonium salt, 0-10% of double eighteenthalkyl dimethyl quaternary ammonium salt, 0-15% of cyanoacetic acid, 0-3% of enynic alcohol, 0-5% of pyridine broc butyl quaternary ammonium salt, 0-2% of tetrabutyl potassium iodide quaternary ammonium salt, 0-25% of copolymer of phono and carboxylic acid and 0-10% of scattering solubilizing agents S, the balance of clean water. The multifunctional treatment agents have the multiple functions of scale prevention, scale dissolution, corrosion resistance and sterilization.
Description
Technical field
The present invention relates to oilfield development technique field, particularly to a kind of preventing and treating side of oil well production process fouling
Method.
Background technology
During producing, the breeding due to antibacterial produces hydrogen sulfide to oilfield, and contains substantial amounts of in production fluid
Ferrous ion, the generation of hydrogen sulfide leads to the generation of iron sulfide insoluble matter, simultaneously because feed flow is not enough, oil pumping pump occurs dry
Take out phenomenon, the result of dry tap is to produce Calcium Carbonate and sulfate insoluble matter, these insoluble matter meetings in oil pumping pump or in pit shaft
Be attached on the piston of oil pumping pump or fouling formed on the tube wall of sucker rod and oil pipe, fouling can lead to rod parting with
The phenomenon of oil pumper pump seizure occurs, and needing operation to resume production thus leading to oil well to lose efficacy, on the one hand delaying the life of oil well
The product time, reduce oily well yield, on the other hand also increase operation cost and the material installation renewal cost of oil well, oil well is given birth to
Produce benefit significantly to decline.
It is mostly periodically to add descaling agent, scale preventative currently for the method that above-mentioned scale formation is taken.Scene should
With reflecting that current technology has the deficiency of following aspects：1st, because, in oil well production process, its hydrodynamic face is change, change
Amplitude is very big, and when particularly oil well has feed flow deficiency, hydrodynamic face occurs being less than oil pumper pumping hole phenomenon, thus periodically
Add descaling agent and appear in too early consumption in the cycle with scale preventative, oil well fouling still occurs, and effect cannot ensure
Medicament wastes greatly simultaneously；2nd, periodically add as too short in the cycle, it is higher with equipment investment cost to be related to substantial amounts of human and material resources,
Then effect can significantly decline excessive cycle, and dosing cost increases severely；3rd, periodically add it is desirable to the adding of descaling agent and scale preventative
Amount is larger, and reagent cost increases, and wastes big；4th, periodically add and cannot be carried out when running into bad weather it is possible to lead to tie
The increasing of dirty well；5th, oil well fouling preventing and treating Multifunctional Additive functionally, at present only account for remove foulant, prevent and treat carbon
Hydrochlorate and the generation of sulfate scale, do not account for the generation of the iron sulfide foulant that bacterial reproduction is led to corrosion, are also oil
The reason well fouling prevention effect difference；6th, the method that current oil well tailpipe installs solid scale-proof apparatus needs during operation
Can change, solid scale-proof apparatus multi-cycle finite, it is impossible to meet the requirement in oil well operation cycle, leads to oil well not arrive it in duty cycle
Front solid scale-proof apparatus have been exhausted, and in the production process in later stage, oil well still can occur scale formation；Current inorganic agent
Function and the imperfection of dosing technique, lead to the effect of oil well fouling preventing and treating poor, high cost.
Content of the invention
In order to overcome the deficiencies in the prior art, it is an object of the invention to provide a kind of preventing and treating of oil well production process fouling
Method, including Multifunctional Additive and dosing technique, while its Multifunctional Additive has snaking with anti-scaling property, also has
Inhibition and the effect sterilizing；Huge discharge can be carried out and adds according to the change of beam-pumping unit sucker rod load during the application of its dosing technique
Medicine is with continuous dosing it is ensured that oil well will not be because of being normally carried out that scale effect produces during whole production.
For achieving the above object, the technical scheme is that：
A kind of prevention and controls of oil well production process fouling are it is characterised in that by the Intelligent medicine adding device of design, take
Certain dosing technique, implements to add have specific Multifunctional Additive, reaches effective control oil well production process fouling
Generation, comprise the following steps：The outlet of Intelligent medicine adding device is connected with the sleeve valve of oil well, in Intelligent medicine adding device certainly
The current overload p-wire of movement controller is connected with oil-well motor, first impact add Multifunctional Additive, dosage M (kg)
=0.25（H-Hd）, wherein H is oil well reservoir depth m, HdFor fluid level depth of oil well m；After impact adds end, carry out continuous
Property add Multifunctional Additive, adjusted by flow controller, design dosage be Q（kg/d）, Q=KCq, wherein CqProduce for oil well
Liquid outlet quantity m3/ d, K are coefficient, work as H-HdDuring less than 200, K be 0.5, work as H-HdDuring less than 400, K be 0.75, work as H-HdLittle
When 600, K be 1.0, work as H-HdDuring less than 800, K be 1.25, work as H-HdDuring more than 800, K be 1.5, the control of dosage Q
Executed by flow controller, when oil well fouling extremely, sucker rod load increases, and automatic controller can be negative according to sucker rod
Lotus change adjusts chemical feeding quantity by flow controller, is designed as, when sucker rod load increases by 2% than normal duty, automatically controlling
Device starts, and turn-on flow rate controller big flow valve carries out dosing, and administration timing of drug is T（min）, the value of T is equal to the three of Q value
Times, the time to after return to seriality to add Multifunctional Additive be normal dosing state, dosage is Q（kg/d）, little 12
When after if pumping unit load is normal, flow controller continues normal dosing, otherwise, automatic controller can repeated priming according to upper
The process of stating carries out big flow dosing, and till sucker rod load recovers normal, flow controller just enters normal dosing；
Described Multifunctional Additive, total amount calculate by mass percentage including：Phytic acid 0～25%, didecyl Dimethy
Quaternary ammonium salt 0～10%, double octadecyl quaternary ammonium salt 0～10%, cyanoacetic acid 0～15%, eneyne alcohol 0～3%, pyridine two brombutyl season
Ammonium salt 0～5%, tetrabutyl potassium iodide quaternary ammonium salt 0～2%, phosphono based polycarboxylic acid 0～25%, 0～10% dispersion solubilizing agent S, balance of
Clear water, above-mentioned percentage-proportion interval does not include 0.
Described Multifunctional Additive, total amount is calculated by mass percentage, and the content after its optimization is：Phytic acid 5-15%, double
Ten alkyl-dimethyl based quaternary ammonium salt 2-5%, double octadecyl quaternary ammonium salt 2-5%, cyanoacetic acid 5-8%, eneyne alcohol 1.2-3%, pyridine two
Brombutyl quaternary ammonium salt 1.2-2.5%, tetrabutyl potassium iodide quaternary ammonium salt 0.1-0.2%, phosphono based polycarboxylic acid 5-15%, 1.5-2% dispersion
Solubilizing agent S, balance of clear water.
Described Intelligent medicine adding device includes pressure medicine storing pot 1, pressure medicine storing pot 1 is provided with sun-generated electric power 6 and from
Movement controller 3, sun-generated electric power 6 is connected with automatic controller 3 provides power supply to automatic controller 3, and automatic controller 3 passes through stream
Amount controller line 4 is connected with flow controller 2, and automatic controller 3 tests the electricity of line 5 and oil pumper by current of electric
Machine connects, and the lower part outlet of pressure medicine storing pot 1 is connected with the import of flow controller 2, the balance pipe 7 on pressure medicine storing pot 1 and
The outlet of flow controller 2 connects, and connects and export 8 to dosing after collecting.
Described flow controller 2 includes annular seal space 9s, and annular seal space 9s is mounted with the first electromagnetism 7s and the second electromagnetism 8s,
Electromagnetic start control connecting line 10s is connected with the first electromagnetism 7s and the second electromagnetism 8s, the first electromagnetism 7s is arranged on hermetically sealed can 13s
Continuous dosing mouth 1s on, the second electromagnetism 8s is arranged on the big flow dosing mouth 5s of hermetically sealed can 13s, the upper and lower position of annular seal space 9s
It is respectively provided with import 11s and outlet 12s, in annular seal space 9s, be provided with a hermetically sealed can 13s, the top left of hermetically sealed can 13s
Be provided with continuous dosing mouth 1s, be provided with dredging needle 2s in continuous dosing mouth 1s, dredging needle 2s be iron-based exterior-heat fusion welding not
Rust steel, the top right of hermetically sealed can 13s is provided with big flow dosing mouth 5s, iron-based seat 3s, sealing block 4s, sealing gasket 6s, big stream
Amount dosing mouth 5s in iron-based seat 3s, sealing gasket 6s its aperture of iron-based seat 3s top be more than big flow dosing mouth 5s aperture,
Sealing block 4s its external diameter on sealing gasket 6s is more than sealing gasket 6s, and the bottom of hermetically sealed can 13s is connected with the outlet 12s of annular seal space 9s
Connect.
Described automatic controller 3 can measure the electric current of oil pumper running motor, when oil pumper operating load just
Chang Shi, automatic controller 3 discontinuity the first electromagnetism 7s in flow controller 2 is energized, make the first electromagnetism 7s discontinuity
Produce magnetic field, absorption with desorption dredging needle 2s, discontinuity open continuous dosing mouth 1s, realize continuous dosing；When oil pumper fortune
Row load is abnormal, current of electric increase 2% when, automatic decision oil well fouling, then automatic controller 3 start to the second electromagnetism
8s carries out energising and produces magnetic field, absorption sealing block 4s moves, opens big flow dosing mouth 5s and carry out big flow dosing, big flow adds
The design discharge capacity of medicine mouth 5s is 1kg/ min, when the load restoration of oil pumping pump is normal, after 12 hours, automatic controller 3 is to first
Electromagnetism 7s is energized, and enters normal continuous dosing.
The invention provides a kind of adding method thereof of Multifunctional Additive, under oil well normal operation, intelligent dosing fills
Put and carry out continuous dosing, prevent produced liquid in oil well fouling；When abnormal, sucker rod load increase in oil pumper pump, exceed original
Load 2% when, automatic controller start flow controller carry out big flow dosing, with fouling in timely clean-up pump with pipe in knot
Dirt, prevents the accumulative generation causing rod parting phenomenon of fouling.
Brief description
Fig. 1 is site intelligent chemicals dosing plant connection diagram, and the outlet of Intelligent medicine adding device is connected with sleeve valve of oil well,
The load measuring alignment of Intelligent medicine adding device is connected with oil-well motor.
Fig. 2 is Intelligent medicine adding device structural representation.
Fig. 3 is the structural representation of flow controller 2 in Intelligent medicine adding device.
Specific embodiment：
Further illustrate the present invention below by specific embodiment.
With reference to Fig. 1, the outlet of Intelligent medicine adding device is connected with the sleeve valve of oil well, automatically controls in Intelligent medicine adding device
The current overload p-wire of device processed is connected with oil-well motor, first impact add Multifunctional Additive, dosage M (kg)=
0.25（H-Hd）, wherein H is oil well reservoir depth m, HdFor fluid level depth of oil well m；After impact adds end, enter Line Continuity
Add Multifunctional Additive, adjusted by flow controller, design dosage is Q（kg/d）, Q=KCq, wherein CqFor oil well output
Liquid measure m3/ d, K are coefficient, work as H-HdDuring less than 200, K be 0.5, work as H-HdDuring less than 400, K be 0.75, work as H-HdIt is less than
When 600, K be 1.0, work as H-HdDuring less than 800, K be 1.25, work as H-HdDuring more than 800, K be 1.5, the control of dosage Q by
Flow controller executes, and when oil well fouling extremely, sucker rod load increases, and automatic controller can be according to the load of sucker rod
Change adjusts chemical feeding quantity by flow controller, is designed as when sucker rod load increases by 2% than normal duty, automatic controller
Start, turn-on flow rate controller big flow valve carries out dosing, administration timing of drug is T（min）, T value is equal to three times of Q value,
Time to after return to seriality to add Multifunctional Additive be normal dosing state, dosage is Q（kg/d）, after 12h
If pumping unit load is normal, flow controller continues normal dosing, and otherwise, automatic controller meeting repeated priming is according to above-mentioned mistake
Cheng Jinhang big flow dosing, till sucker rod load recovers normal, flow controller just enters normal dosing；
Described Multifunctional Additive, total amount be calculated in terms of percentage including：Phytic acid 0～25%, didecyl Dimethy quaternary ammonium
Salt 0～10%, double octadecyl quaternary ammonium salt 0～10%, cyanoacetic acid 0～15%, eneyne alcohol 0～3%, pyridine two brombutyl quaternary ammonium salt
0～5%, tetrabutyl potassium iodide quaternary ammonium salt 0～2%, phosphono based polycarboxylic acid 0～25%, 0～10% dispersion solubilizing agent S, balance of clear
Water, above-mentioned percentage-proportion interval does not include 0.
Described Multifunctional Additive, total amount is calculated by mass percentage, and the content after its optimization is：Phytic acid 5-15%, double
Ten alkyl-dimethyl based quaternary ammonium salt 2-5%, double octadecyl quaternary ammonium salt 2-5%, cyanoacetic acid 5-8%, eneyne alcohol 1.2-3%, pyridine two
Brombutyl quaternary ammonium salt 1.2-2.5%, tetrabutyl potassium iodide quaternary ammonium salt 0.1-0.2%, phosphono based polycarboxylic acid 5-15%, 1.5-2% dispersion
Solubilizing agent S, balance of clear water.
With reference to Fig. 2, described chemicals dosing plant includes pressure medicine storing pot 1, pressure medicine storing pot 1 is provided with sun-generated electric power 6
With automatic controller 3, sun-generated electric power 6 is connected with automatic controller 3 provides power supply to automatic controller 3, and automatic controller 3 leads to
Excessively stream amount controller line 4 is connected with flow controller 2, and automatic controller 3 tests line 5 and oil pumper by current of electric
Motor connection, the lower part outlet of pressure medicine storing pot 1 is connected with the import of flow controller 2, the balance pipe on pressure medicine storing pot 1
7 are connected with the outlet mouth of flow controller 2, connect and export 8 to dosing after collecting.
With reference to Fig. 3, described flow controller 2 is by continuous dosing mouth 1s, dredging needle 2s, big flow dosing mouth 5s, iron-based
Seat 3s, sealing block 4s, sealing gasket 6s, the first electromagnetism 7s and the second electromagnetism 8s, annular seal space 9s, electromagnetic start control connecting line 10s,
Import 11s is formed with outlet 12s, hermetically sealed can 13s.First electromagnetism 7s and second is mounted with the annular seal space 9s of flow controller 2
Electromagnetic start control connecting line 10s is connected with electromagnetism 8s, the first electromagnetism 7s and the second electromagnetism 8s, the first electromagnetism 7s is arranged on close
On the continuous dosing mouth 1s of sealed cans 13s, the second electromagnetism 8s is arranged on the big flow dosing mouth 5s of hermetically sealed can 13s, annular seal space 9s
Position is respectively provided with import 11s and outlet 12s up and down, is provided with a hermetically sealed can 13s in annular seal space 9s, hermetically sealed can 13s's
Top left is provided with continuous dosing mouth 1s, is provided with dredging needle 2s in continuous dosing mouth 1s, and dredging needle 2s is iron-based exterior-heat
Fusion welding rustless steel, the top right of hermetically sealed can 13s is provided with big flow dosing mouth 5s, iron-based seat 3s, sealing block 4s（Sealing block
4s is iron-based external hot melting soldering stainless steel）, sealing gasket 6s, big flow dosing mouth 5s is in iron-based seat 3s, sealing gasket 6s is in iron-based
Seat its aperture of 3s top is more than the aperture of big flow dosing mouth 5s, sealing block 4s its external diameter on sealing gasket 6s and is more than sealing gasket
6s, the bottom of hermetically sealed can 13s is connected with the outlet 12s of annular seal space 9s.
Described automatic controller 3 can measure the electric current of oil pumper running motor, when oil pumper operating load just
Chang Shi, automatic controller 3 discontinuity the first electromagnetism 7s in flow controller 2 is energized, make the first electromagnetism 7s discontinuity
Produce magnetic field, absorption with desorption dredging needle 2s, discontinuity open continuous dosing mouth 1s, realize continuous dosing；When oil pumper fortune
Row load is abnormal, current of electric increase 2% when, automatic decision oil well fouling, then automatic controller 3 start to the second electromagnetism
8s carries out energising and produces magnetic field, absorption sealing block 4s moves, opens big flow dosing mouth 5s and carry out big flow dosing, big flow adds
The design discharge capacity of medicine mouth 5s is 1kg/min, and when the load restoration of oil pumping pump is normal, after 12 hours, automatic controller 3 is to first
Electromagnetism 7s is energized, and enters normal continuous dosing.
The principle of the present invention is：
The invention provides a kind of Multifunctional Additive, total amount is calculated by mass percentage, and the content after its optimization is：Plant
Sour 5-15%, didecyl Dimethy quaternary ammonium salt 2-5%, double octadecyl quaternary ammonium salt 2-5%, cyanoacetic acid 5-8%, eneyne alcohol 1.2-
3%th, pyridine two brombutyl quaternary ammonium salt 1.2-2.5%, tetrabutyl potassium iodide quaternary ammonium salt 0.1-0.2%, phosphono based polycarboxylic acid 5-15%,
1.5-2% disperses solubilizing agent S, balance of clear water.This Multifunctional Additive has dissolving calcium carbonate scale, sulfate scale, iron sulfide dirt
Function, to calcium carbonate scale, sulfate scale, iron sulfide dirt, there is scale inhibition function, there is to production fluid the function of inhibition, have and kill
Go out the function of antibacterial, the breeding such that it is able to control production fluid antibacterial produces hydrogen sulfide increases iron sulfide fouling, sterilizing rate then
More than 95%；The foulant in oil pumping pump and the foulant on tubing wall can be removed, prevent foulant from piling up holddown and kelly
Well rod is led to break de-, snaking rate is more than 90%；Carbonic acid dirt fouling, sulfate scale, iron sulfide fouling, resistance can be stoped
Dirty rate is more than 85%；The corrosion of production fluid can be controlled, corrosion inhibition rate reaches more than 75%, corrosion rate is less than 0.076mm/a.
In Intelligent medicine adding device, automatic controller 3 being capable of taking out according to the variation diagnostic oil pumper of motor of oil extractor electric current
Whether beam hanger load increases, and determines whether oil well has tube wall incrustation and scale formation in pump, when scale effect in discovery oil well
Oil pumper runs, and when sucker rod load exceedes the 2% of original loads, automatic controller startup flow controller carries out big flow and adds
Medicine, with clean-up pump with pipe in foulant, prevent excessive fouling from leading to the generation of rod parting phenomenon.
Flow controller 2 in Intelligent medicine adding device, devises a continuous dosing mouth 1s, is energized by electromagnetism 7s discontinuity
The magnetic field absorption dredging needle 2s producing runs guarantee continuous dosing mouth up and down and occurs without clogging；Devise a big flow to add
Medicine mouth 5s, moves on absorption sealing block 4s after being energized by electromagnetism 8s, opens 5s and carry out dosing；Flow controller utilizes magnetic force principle energy
So that the flow is reached the discharge capacity of very little and not block in running, it is to avoid easily occur in the case of plunger displacement pump small displacement into
The phenomenon that mouth blocks or ball-and-seat is poorly sealed.
Embodiment one
The dosing technique of the present embodiment：
The oil well of the present embodiment its（H-Hd）=640m, Liquid output is 7.5m3/ d, disposable first impact adds multi-functional
Inorganic agent 160kg；Start seriality after adding and add Multifunctional Additive, adjust the stream of flow controller by automatic controller
Measure as 7.5kg/d（Q=1.0×Cq）.Design of Auto Controller big flow administration timing of drug 22.5min (T=3Q).
Multifunctional Additive forms：Phytic acid 12%, didecyl Dimethy quaternary ammonium salt 3%, double octadecyl quaternary ammonium salt 2%, cyanogen
Guanidine-acetic acid 5%, eneyne alcohol 1.5%, pyridine two brombutyl quaternary ammonium salt 1.2%, tetrabutyl potassium iodide quaternary ammonium salt 0.15%, the poly- carboxylic of phosphono
Acid 10%, 1.5% dispersion solubilizing agent S, balance of clear water.
Implementation result：Produced liquid in oil well bacterial content is 0/mL, and production fluid corrosion rate is by the 0.162mm/a before dosing
Drop to 0.0237mm/a, corrosion inhibition rate reaches 85.3%, before dosing the oil well fouling average operation cycle be 52 days, do not have after dosing because
Fouling operation.
Embodiment two
The dosing technique of the present embodiment：
The oil well of the present embodiment its（H-Hd）=510m, Liquid output is 4.8m3/ d, disposable first impact adds multi-functional
Inorganic agent 128kg；Start seriality after adding and add Multifunctional Additive, adjust the stream of flow controller by automatic controller
Measure as 4.8kg/d（Q=1.0×Cq）.Design of Auto Controller big flow administration timing of drug 14.5min (T=3Q).
Multifunctional Additive forms：Phytic acid 8%, 3.5% didecyl Dimethy quaternary ammonium salt, double octadecyl quaternary ammonium salt
2.5%th, cyanoacetic acid 7%, eneyne alcohol 1.2%, pyridine two brombutyl quaternary ammonium salt 1.4%, tetrabutyl potassium iodide quaternary ammonium salt 0.1%, phosphono
Based polycarboxylic acid 13%, 1.7% disperses solubilizing agent S, balance of clear water.
Implementation result：Produced liquid in oil well bacterial content is 4.5/mL, before production fluid corrosion rate is by dosing
0.184mm/a drops to 0.0247mm/a, and corrosion inhibition rate reaches 86.5%, and before dosing, the oil well fouling average operation cycle is 43 days, dosing
Afterwards not because of fouling operation.
Embodiment three
The dosing technique of the present embodiment：
The oil well of the present embodiment its（H-Hd）=930m, Liquid output is 21.6m3/ d, disposable first impact adds many work(
Can inorganic agent 230kg；Start seriality after adding and add Multifunctional Additive, flow controller is adjusted by automatic controller
Flow is 32.4kg/d（Q=1.0×Cq）.Design of Auto Controller big flow administration timing of drug 97min (T=3Q).
Multifunctional Additive forms：Phytic acid 14%, didecyl Dimethy quaternary ammonium salt 2.5%, double octadecyl quaternary ammonium salt 2%,
Cyanoacetic acid 5%, eneyne alcohol 1.5%, pyridine two brombutyl quaternary ammonium salt 2%, tetrabutyl potassium iodide quaternary ammonium salt 0.17%, the poly- carboxylic of phosphono
Acid 6%, 2% dispersion solubilizing agent S, balance of clear water.
Implementation result：Produced liquid in oil well bacterial content is 0/mL, and production fluid corrosion rate is by the 0.157mm/a before dosing
Drop to 0.0213mm/a, corrosion inhibition rate reaches 86.4%, before dosing the oil well fouling average operation cycle be 68 days, do not have after dosing because
Fouling operation.
Example IV
The dosing technique of the present embodiment：
The oil well of the present embodiment its（H-Hd）=680m, Liquid output is 12.5m3/ d, disposable first impact adds many work(
Can inorganic agent 170kg；Start seriality after adding and add Multifunctional Additive, flow controller is adjusted by automatic controller
Flow is 15.6kg/d（Q=1.0×Cq）.Design of Auto Controller big flow administration timing of drug 47min (T=3Q).
Multifunctional Additive forms：Phytic acid 6%, didecyl Dimethy quaternary ammonium salt 2.5%, double octadecyl quaternary ammonium salt 3%,
Cyanoacetic acid 8%, eneyne alcohol 1.5%, pyridine two brombutyl quaternary ammonium salt 2.5%, tetrabutyl potassium iodide quaternary ammonium salt 0.2%, phosphono gather
Carboxylic acid 10%, 1.5% disperses solubilizing agent S.
Implementation result：Produced liquid in oil well bacterial content is 2.5/mL, before production fluid corrosion rate is by dosing
0.173mm/a drops to 0.0286mm/a, and corrosion inhibition rate reaches 83.4%, and before dosing, the oil well fouling average operation cycle is 47 days, dosing
Afterwards not because of fouling operation.
Embodiment five
The dosing technique of the present embodiment：
The oil well of the present embodiment its（H-Hd）=320m, Liquid output is 3.6m3/ d, disposable first impact adds multi-functional
Inorganic agent 80kg；Start seriality after adding and add Multifunctional Additive, adjust the stream of flow controller by automatic controller
Measure as 2.7kg/d（Q=1.0×Cq）.Design of Auto Controller big flow administration timing of drug 8min (T=3Q).
Multifunctional Additive forms：Phytic acid 5%, didecyl Dimethy quaternary ammonium salt 2%, double octadecyl quaternary ammonium salt 2.5%,
Cyanoacetic acid 8%, eneyne alcohol 2.5%, pyridine two brombutyl quaternary ammonium salt 2.5%, tetrabutyl potassium iodide quaternary ammonium salt 0.15%, phosphono gather
Carboxylic acid 15%, 2% disperses solubilizing agent S, balance of clear water.
Implementation result：Produced liquid in oil well bacterial content is 6.5/mL, before production fluid corrosion rate is by dosing
0.144mm/a drops to 0.0205mm/a, and corrosion inhibition rate reaches 85.7%, and before dosing, the oil well fouling average operation cycle is 35 days, dosing
Afterwards not because of fouling operation.
Embodiment six
The dosing technique of the present embodiment：
The oil well of the present embodiment its（H-Hd）=1150m, Liquid output is 10.4m3/ d, disposable first impact adds many work(
Can inorganic agent 280kg；Start seriality after adding and add Multifunctional Additive, flow controller is adjusted by automatic controller
Flow is 16kg/d（Q=1.0×Cq）.Design of Auto Controller big flow administration timing of drug 48min (T=3Q).
Multifunctional Additive forms：Phytic acid 10%, didecyl Dimethy quaternary ammonium salt 3%, double octadecyl quaternary ammonium salt 1.5%,
Cyanoacetic acid 7%, eneyne alcohol 2.5%, pyridine two brombutyl quaternary ammonium salt 1.5%, tetrabutyl potassium iodide quaternary ammonium salt 0.15%, phosphono gather
Carboxylic acid 8%, 1.5% disperses solubilizing agent S, balance of clear water.
Implementation result：Produced liquid in oil well bacterial content is 5/mL, and production fluid corrosion rate is by the 0.162mm/a before dosing
Drop to 0.0207mm/a, corrosion inhibition rate reaches 87%, before dosing, the oil well fouling average operation cycle is 74 days, not because of knot after dosing
Dirty operation.
Embodiment seven
The dosing technique of the present embodiment：
The oil well of the present embodiment its（H-Hd）=470m, Liquid output is 12.2m3/ d, disposable first impact adds many work(
Can inorganic agent 118kg；Start seriality after adding and add Multifunctional Additive, flow controller is adjusted by automatic controller
Flow is 12kg/d（Q=1.0×Cq）.Design of Auto Controller big flow administration timing of drug 36min (T=3Q).
Multifunctional Additive forms：Phytic acid 15%, didecyl Dimethy quaternary ammonium salt 2%, double octadecyl quaternary ammonium salt 3%, cyanogen
Guanidine-acetic acid 7%, eneyne alcohol 3%, pyridine two brombutyl quaternary ammonium salt 2.5%, tetrabutyl potassium iodide quaternary ammonium salt 0.15%, phosphono based polycarboxylic acid
5%th, 2% dispersion solubilizing agent S, balance of clear water.
Implementation result：Produced liquid in oil well bacterial content is 6.5/mL, before production fluid corrosion rate is by dosing
0.185mm/a drops to 0.0216mm/a, and corrosion inhibition rate reaches 88%, and before dosing, the oil well fouling average operation cycle is 64 days, after dosing
Not because of fouling operation.
Claims (4)
1. a kind of prevention and controls of oil well production process fouling are it is characterised in that by the Intelligent medicine adding device of design, take one
Fixed dosing technique, implements to add have specific multi-functional inorganic agent, reaches effective control oil well production process fouling
Occur, specifically include following steps：The outlet of Intelligent medicine adding device is connected with the sleeve valve of oil well, in Intelligent medicine adding device
The current overload p-wire of automatic controller is connected with oil-well motor, first impact add Multifunctional Additive, total dosage M
(kg)=0.25 (H-Hd), wherein H is oil well reservoir depth m, HdFor fluid level depth of oil well m；After impact adds end, carry out
Seriality adds Multifunctional Additive, is adjusted by flow controller, and design dosage is Q (m3/ d), Q=KCq, wherein CqFor
Produced liquid in oil well amount m3/ d, K are coefficient, work as H-HdDuring less than 200, K be 0.5, work as H-HdLess than 400 and more than or equal to 200
When, K be 0.75, work as H-HdLess than 600 and more than or equal to 400 when, K be 1.0, work as H-HdLess than 800 and more than or equal to 600 when,
K is 1.25, works as H-HdDuring more than or equal to 800, K be 1.5, the control of dosage Q is executed by flow controller, when oil well occur
Fouling is abnormal, and sucker rod load increases, and automatic controller can be added by flow controller adjustment according to the load variations of sucker rod
Dose, is designed as when sucker rod load increases by 2% than normal duty, automatic controller starts, the big stream of turn-on flow rate controller
Amount valve carries out dosing, and administration timing of drug is T (min), and the value of T is equal to three times of Q value, and the time adds to returning to seriality
Multifunctional Additive is normal dosing state, if pumping unit load is normal after 12h, flow controller continues normal adding
Medicine, otherwise, automatic controller can carry out big flow dosing by repeated priming as procedure described above, until sucker rod load recovers normal
Till, flow controller just enters normal dosing；
Described Multifunctional Additive, total amount calculate by mass percentage including：Phytic acid 0～25%, didecyl Dimethy season
Ammonium salt 0～10%, double octadecyl quaternary ammonium salt 0～10%, cyanoacetic acid 0～15%, eneyne alcohol 0～3%, pyridine two brombutyl
Quaternary ammonium salt 0～5%, tetrabutyl potassium iodide quaternary ammonium salt 0～2%, phosphono based polycarboxylic acid 0～25%, 0～10% dispersion solubilizing agent S,
Balance of clear water, above-mentioned percentage-proportion interval does not include 0；
Described Intelligent medicine adding device includes pressure medicine storing pot (1), pressure medicine storing pot (1) is provided with sun-generated electric power (6) and
Automatic controller (3), sun-generated electric power (6) is connected with automatic controller (3) provides power supply to automatic controller (3), automatically controls
Device (3) processed is connected with flow controller (2) by flow controller line (4), and automatic controller (3) is surveyed by current of electric
Examination line (5) and the motor connection of oil pumper, the lower part outlet of pressure medicine storing pot (1) is connected with the import of flow controller (2),
Balance pipe (7) on pressure medicine storing pot (1) is connected with the outlet of flow controller (2), connects and export (8) to dosing after collecting.
2. a kind of prevention and controls of oil well production process fouling according to claim 1 are it is characterised in that described many work(
Energy inorganic agent, total amount is calculated by mass percentage, and content is：Phytic acid 5-15%, didecyl Dimethy quaternary ammonium salt 2-5%, double
Octadecyl quaternary ammonium salt 2-5%, cyanoacetic acid 5-8%, eneyne alcohol 1.2-3%, pyridine two brombutyl quaternary ammonium salt 1.2-2.5%,
Tetrabutyl potassium iodide quaternary ammonium salt 0.1-0.2%, phosphono based polycarboxylic acid 5-15%, 1.5-2% dispersion solubilizing agent S, balance of clear water.
3. a kind of prevention and controls of oil well production process fouling according to claim 1 are it is characterised in that described flow
Controller (2) includes annular seal space (9s), and annular seal space (9s) is mounted with the first electromagnetism (7s) and the second electromagnetism (8s), the first electromagnetism
(7s) and it is connected with electromagnetic start control connecting line (10s) on the second electromagnetism (8s), the first electromagnetism (7s) is arranged on hermetically sealed can
(13s), on continuous dosing mouth (1s), the second electromagnetism (8s) is arranged on the big flow dosing mouth (5s) of hermetically sealed can (13s), close
Position is respectively provided with import (11s) and outlet (12s) to envelope chamber (9s) up and down, is provided with a hermetically sealed can in annular seal space (9s)
(13s), the top left of hermetically sealed can (13s) is provided with continuous dosing mouth (1s), is provided with dredging in continuous dosing mouth (1s)
Pin (2s), dredging needle (2s) is iron-based external hot melting soldering stainless steel, and the top right of hermetically sealed can (13s) is provided with big flow dosing
Mouthful (5s), iron-based seat (3s), sealing block (4s), sealing gasket (6s), big flow dosing mouth (5s) in iron-based seat (3s), sealing gasket
(6s) its aperture of iron-based seat (3s) top be more than big flow dosing mouth (5s) aperture, sealing block (4s) sealing gasket (6s) it
Its external diameter upper is more than sealing gasket (6s), and the bottom of hermetically sealed can (13s) is connected with the outlet (12s) of annular seal space (9s).
4. a kind of prevention and controls of oil well production process fouling according to claim 1 are it is characterised in that described is automatic
Controller (3) can measure the electric current of oil pumper running motor, when oil pumper operating load is normal, automatic controller
(3) discontinuity in flow controller (2) the first electromagnetism (7s) energising, make the generation magnetic of the first electromagnetism (7s) discontinuity
, absorption with desorption dredging needle (2s), discontinuity open continuous dosing mouth (1s), realize continuous dosing；When oil pumper runs
Load is abnormal, when current of electric increases 2%, automatic decision oil well fouling, and then automatic controller (3) startup is to the second electromagnetism
(8s) carry out energising and produce magnetic field, absorption sealing block (4s) is upper to move, and opens big flow dosing mouth (5s) and carries out big flow dosing, greatly
The design discharge capacity of flow dosing mouth (5s) is 1kg/min, when the load restoration of oil pumping pump is normal, after 12 hours, automatically controls
Device (3) is energized to the first electromagnetism (7s), enters normal continuous dosing.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2481848Y (en) * | 2001-04-30 | 2002-03-13 | 葛孚兴 | Automatic controlled dosing device for oil well |
| RU2369735C1 (en) * | 2008-10-27 | 2009-10-10 | Открытое Акционерное Общество "Татнефть" им В.Д. Шашина | Method of control of corrosion caused with sulphate-reducing bacteria |
| CN102287173A (en) * | 2011-09-08 | 2011-12-21 | 北京恩瑞达科技有限公司 | Well mouth photo-electricity remote sensing self-control instilling system and method |
| CN103410474A (en) * | 2013-08-07 | 2013-11-27 | 西安石油大学 | Corrosion control method for annular space tubing and casings of oil field water injection well |
| CN103410475A (en) * | 2013-08-07 | 2013-11-27 | 西安石油大学 | Environment-friendly annular continuous dosing automatic device for oil-gas wells and dosing method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8893795B2 (en) * | 2011-12-15 | 2014-11-25 | Robert N. Ayres | Automatic chemical treatment system with liquid level sensor in chemical tank for calibration and chemical dispensing rate control |
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2014
- 2014-02-28 CN CN201410070101.6A patent/CN103790553B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2481848Y (en) * | 2001-04-30 | 2002-03-13 | 葛孚兴 | Automatic controlled dosing device for oil well |
| RU2369735C1 (en) * | 2008-10-27 | 2009-10-10 | Открытое Акционерное Общество "Татнефть" им В.Д. Шашина | Method of control of corrosion caused with sulphate-reducing bacteria |
| CN102287173A (en) * | 2011-09-08 | 2011-12-21 | 北京恩瑞达科技有限公司 | Well mouth photo-electricity remote sensing self-control instilling system and method |
| CN103410474A (en) * | 2013-08-07 | 2013-11-27 | 西安石油大学 | Corrosion control method for annular space tubing and casings of oil field water injection well |
| CN103410475A (en) * | 2013-08-07 | 2013-11-27 | 西安石油大学 | Environment-friendly annular continuous dosing automatic device for oil-gas wells and dosing method |
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