CN203419784U - Oilfield injection water fixed-point calcium scale removal device - Google Patents
Oilfield injection water fixed-point calcium scale removal device Download PDFInfo
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- CN203419784U CN203419784U CN201320499714.2U CN201320499714U CN203419784U CN 203419784 U CN203419784 U CN 203419784U CN 201320499714 U CN201320499714 U CN 201320499714U CN 203419784 U CN203419784 U CN 203419784U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 169
- 238000002347 injection Methods 0.000 title claims abstract description 28
- 239000007924 injection Substances 0.000 title claims abstract description 28
- 239000011575 calcium Substances 0.000 title abstract description 30
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 title abstract description 25
- 229910052791 calcium Inorganic materials 0.000 title abstract description 25
- 239000010865 sewage Substances 0.000 claims abstract description 33
- 239000003795 chemical substances by application Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 8
- 230000000630 rising effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000013043 chemical agent Substances 0.000 abstract description 9
- 239000012141 concentrate Substances 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 abstract 2
- 235000012255 calcium oxide Nutrition 0.000 abstract 1
- 239000000292 calcium oxide Substances 0.000 abstract 1
- 239000010802 sludge Substances 0.000 abstract 1
- 238000013461 design Methods 0.000 description 12
- 239000012530 fluid Substances 0.000 description 8
- 150000002500 ions Chemical class 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 241000894006 Bacteria Species 0.000 description 4
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- 238000011109 contamination Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000002455 scale inhibitor Substances 0.000 description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical group [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 241000295146 Gallionellaceae Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
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- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical group [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 238000003809 water extraction Methods 0.000 description 1
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Abstract
A fixed-point calcium scale removing device for oilfield injection water belongs to the technical field of oilfield gathering and transportation production. A 100m diameter of 4.5m and a height of 6m3The device comprises a water injection buffer tank, a clean water inlet pipeline of DN80, a DN80 sewage inlet pipeline, a chemical agent dosing pipeline which has the diameter of DN30 and is concentric with the clean water inlet pipeline, a chemical agent dosing pump, a buffer tank water outlet pipeline of DN80, a DN100 sludge discharge outlet pipeline, and an arched manhole which is 1.2m high and 0.6m in curved surface radius; the utility model discloses be suitable for the water injection production of all kinds of oil water gas wells, become passive scale control for the initiative scale deposit, through adding chemical agent, carry out quick lime scaling in the assigned position or the region of specific device, concentrate at last and clear away to guarantee that follow-up technology does not do notThe production is stopped due to the problem of calcium scaling.
Description
Technical field
The utility model relates to a kind of oilfield injection water fixed point deliming dirt device, belongs to oil field gathering and transportation production technical field.
Background technology
For waterflooding oil field, for meeting injected water index, conventionally need process injected water, the indexs such as the oil-containing of water quality, suspended substance, bacteria content, corrosion speed are had to clear and definite requirement.Yet the indexs such as the water type during for re-injection, ion content, pH value, scaling tendency are not but done requirement.Therefore although injected water is can be up to standard and inject stratum, but for some special oil reservoirs, water quality standard is formulated thick or imperfection, causes the injected water of these " up to standard " after " up to standard " water with other sources mixes, the situation that is incompatible producing, and then cause pipeline and equipment scaling.When serious, be recycled in stratum, after contacting, cause reservoir to stop up with resident fluid, infringement reservoir permeability, affects waterflooding development effect.
At present, domestic oilfield injection water is mainly divided into oilfield sewage and water supply well clear water.For oilfield sewage, through after a series of processing, in indexs such as oil-containing, suspended substance, bacteria content, corrosion speeds, can reach requirement.But because oilfield sewage is a kind of mixed water body, can there is erratic variation with production development in its composition and character, Na in water
+, Ca
2+, HCO
3 -, Cl
-the number of ion content has directly determined the water type of sewage.Therefore therefore, water type also may occur changing or repeatedly, and because sewage itself has certain scaling tendency, this trend can constantly change with temperature, pressure, change in flow.Therefore,, after reinjection into reservoir, this scaling tendency may be more obvious.Clear water for water supply well, although all meet injected water standard in the indexs such as oil-containing, suspended substance, bacteria content, corrosion speed, but owing to the indexs such as water type, pH value, structure trend not being done to requirement, while making to using clear water as injected water, may produce being incompatible in water type with resident fluid, and then cause fouling, stop up reservoir.In addition, the mode of mix injecting if take, water supply well clear water exists the possibility that is incompatible and loses calcium fouling equally with disposing of sewage.And both mix rear injection stratum, there is further variation in ion component and content even water type, and scaling tendency may further aggravate, and may be incompatible with resident fluid and stop up reservoir equally.If take, add the way of Scale inhibitors, the chemical feeding points of Scale inhibitors, dosing type and chemical feeding quantity may constantly be adjusted with these variations, finally cause scale inhibition effect constantly to fluctuate, cannot thoroughly solve waterflood-transmission line scale problems, there is the blocked danger that waits in waterflood-transmission line, to field produces, brings serious potential safety hazard equally.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model provides a kind of oilfield injection water fixed point deliming dirt device.
A device for oilfield injection water fixed point deliming dirt, sewer pipeline is placed in the manhole below of water filling surge tank bottom, and the quick fouling agent of clear water source line and ASA dosing pipeline is concentric structure pipeline, and inner tube is the quick fouling agent of ASA dosing pipeline; Concentric structure entrance is above the sewage inlet pipeline of water filling surge tank bottom and manhole; The quick fouling agent of ASA dosing pipeline is connected with dosing pump; Concentric structure pipeline is first drawn pipeline to rise to tank body top by 90 ° of steering knuckles near water filling surge tank inwall, and concentric structure pipeline causes tank body middle part middle position by another 90 ° of steering knuckles by pipeline again; Concentric structure pipe end adopts bell-mouth structure of air, and the outer tube caliber of bell-mouth structure of air is greater than the caliber of entrance, and inner tube diameter remains unchanged, and end inner tube Length Ratio outer tube is long 25mm slightly; The intake of water filling surge tank opposite side top connecting water pipe line, water pipeline prolongs water filling surge tank inwall to downward-extension, and water pipeline causes tank body outside by 90 ° of steering knuckles by pipeline; The outlet of water outlet pipeline is positioned at directly over spoil disposal outlet, and rising pipe line position is higher than the entry position of next flow process; Water filling surge tank bottom is sucker structure, by a mud delivery pipeline, causes tank outer vent.
A device for oilfield injection water fixed point deliming dirt, comprising: a diameter 4.5m, the 100m of high 6m
3water filling surge tank,, a clear water source line of DN80,, a DN80 sewage inlet pipeline, article one, the chemical agent dosing pipeline concentric with clear water source line that diameter is DN30, a chemical agent dosing pump,, a surge tank water outlet pipeline of DN80, the spoil disposal outlet line of a DN100, and the arch manhole of high 1.2m, subsequent corrosion 0.6m;
Described oilfield injection water fixed point deliming dirt device is to be placed in water filling surge tank bottom by sewer pipeline, manhole below; Pipeline adopts the even portion of round about manner liquid in water filling surge tank; The quick fouling agent of clear water source line and ASA dosing pipeline adopts concentric design, and inner tube is the quick fouling agent of ASA dosing pipeline, and inner and outer pipes annular space is the clear water region of flowing through; Concentric tube entrance is in water filling surge tank bottom, the top of sewage inlet pipeline and manhole; The quick fouling agent of ASA dosing pipeline adopts and is firmly connected with dosing pump; Concentric tube is first drawn pipeline to rise to tank body top by 90 ° of steering knuckles near water filling surge tank inwall, and then by another 90 ° of steering knuckles, pipeline is caused to tank body middle part middle position; Concentric tube end adopts hydraucone design, and outer tube caliber is greater than the caliber of entrance, and inner tube diameter remains unchanged, and end inner tube Length Ratio outer tube is long 25mm slightly; Surge tank opposite side top sets out the intake of water pipeline, and pipeline prolongs water filling surge tank inwall to downward-extension, and by 90 ° of steering knuckles, pipeline is caused to tank body outside; The outlet of water outlet pipeline is positioned at directly over spoil disposal outlet, and position is higher than the entry position of next flow process; Water filling surge tank bottom, for sucker designs, causes tank outer vent by a mud delivery pipeline.
The utility model simplicity of design, workable.In injected water and the incompatible situation of resident fluid, can realize single clear water, single notes sewage, mixed water injection of removing contamination noted, and can not produce, tie calcium dirt.In special non-pressure vessel, the quick fouling agent adopting can be at fluid temperature (F.T.) 20-40 ℃, flow velocity 0.2-0.75m/s, and pH is under the alkaline environment of 8.75 left and right, can realize calcium dirt near the quick fouling agent outlet line mouth of pipe, separates out calcium dirt precipitation in 15min.To being precipitated to the calcium dirt at the bottom of tank, by sucker, collect, and by outside mud delivery pipeline drain tank, do not affect normal production, reach the timely spoil disposal effect of cleaning in time.
The flooding production of the applicable all kinds of profit gas wells of the utility model, become passive antiscale into initiatively fouling, by adding chemical agent, in specified location or the region of specific device, tie fast calcium dirt, finally concentrate and remove, to guarantee that subsequent technique is not because knot calcium dirt problem causes stopping production.Be applicable to inject water quality and have relatively high expectations, or require the oil field of meticulous water filling.Meanwhile, equipment is simple, workable, and safety is protected, and is once improving and supplementing current treatment device for water.At home and abroad promote the use of in all kinds of oil fields, has good development prospect.
Accompanying drawing explanation
When considered in conjunction with the accompanying drawings, by the detailed description with reference to below, can more completely understand better the utility model and easily learn wherein many advantages of following, but accompanying drawing described herein is used to provide further understanding of the present utility model, form a part of the present utility model, schematic description and description of the present utility model is used for explaining the utility model, do not form improper restriction of the present utility model, as schemed wherein:
Fig. 1 is structural representation of the present utility model.
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Embodiment
Obviously, the many modifications and variations that those skilled in the art do based on aim of the present utility model belong to protection domain of the present utility model.
Embodiment 1: as shown in Figure 1,
The utility model be take Xinjiang oilfield treatments reused sewage and water supply well clear water and is mixed and inject stratum and carry out waterflooding as design background, complete water quality analysis by the sewage to after oilfield treatments and water supply well clear water is found: dispose of sewage as Sodium Hydrogen Carbonate water type, salinity 22457.8mg/L, wherein Ca
2+ion content 39.1mg/L, HCO
3 -ion content reaches 4295.2mg/L, and pH is 8.01, and iron bacteria and saprophytic microorganism content are all less than 1000/mL, and suspension content≤5mg/L, within corrosion speed is also controlled at 0.076mm/a; Water supply well clear water is chloride-calcium type, salinity 1770mg/L, Cl
-ion content is 782.6mg/L, Ca
2+ion content 160mg/L, pH is 6.70, bacteria content is all in injected water standard.Although dispose of sewage, all reached the standard of this oilfield injection water with water supply well clear water, but find by analysis: in water type, water supply well clear water is incompatible with disposing of sewage, shop experiment shows: the two kinds of water at normal temperatures mistake calcium rate of 4h reaches 66.3%, especially in front 1h, Ca2+ losses of ions has reached 56.3%.Therefore, after two kinds of water mix, can produce calcium dirt, stop up reservoir, impact is produced.In addition, water supply well clear water and local water also exist and are incompatible, and local water water type is sodium bicarbonate type, and pH is 8.58.After two kinds of water mix at normal temperatures, the Ca in water
2+ion can run off rapidly, loses calcium rate and suddenly increases, and knot calcium dirt phenomenon is serious, cannot reach the object of reinjection into reservoir.Site Design is used produced-water reinjection stratum, but when dispose of sewage re-injection quantity not sufficient time, can give supply by injecting water supply well clear water, this certainly will cause water quality to be incompatible because of the difference of the water type of sewage and clear water, even causes mixed water quality to occur situation not up to standard because of knot calcium dirt.
A device for oil field injected water fixed point up to standard deliming dirt, comprising: a diameter 4.5m, the 100m of high 6m
3water filling surge tank,, a clear water source line 2 of DN80, article one, DN80 sewage inlet pipeline 3, article one, the chemical agent dosing pipeline 4 concentric with clear water source line that diameter is DN30, the spoil disposal outlet line 6 of 5, one DN100 of surge tank water outlet pipeline of 1, one DN80 of a chemical agent dosing pump, and high 1.2m, the arch manhole 7 of subsequent corrosion 0.6m.
Described oilfield injection water fixed point deliming dirt device is to be placed in water filling surge tank bottom by sewer pipeline 3, manhole 7 belows.Pipeline adopts the even portion of round about manner liquid in water filling surge tank.The quick fouling agent of clear water source line 2 and ASA dosing pipeline 4 adopts concentric design, and inner tube is the quick fouling agent of ASA dosing pipeline 4, and inner and outer pipes annular space is the clear water region of flowing through.Concentric tube entrance is in water filling surge tank bottom, the top of sewage inlet pipeline 3 and manhole 7.The quick fouling agent of ASA dosing pipeline 4 adopts and is firmly connected with dosing pump 1.Concentric tube is first drawn pipeline to rise to tank body top by 90 ° of steering knuckles near water filling surge tank inwall, and then by another 90 ° of steering knuckles, pipeline is caused to tank body middle part middle position.Concentric tube end adopts hydraucone design, and outer tube caliber is greater than the caliber of entrance, and inner tube diameter remains unchanged, and end inner tube Length Ratio outer tube is long 25mm slightly.Surge tank opposite side top sets out the intake of water pipeline 5, and pipeline prolongs water filling surge tank inwall to downward-extension, and by 90 ° of steering knuckles, pipeline is caused to tank body outside.The outlet of water outlet pipeline 5 is positioned at directly over spoil disposal outlet 6, and position is higher than the entry position of next flow process.Water filling surge tank bottom, for sucker designs, causes tank outer vent by a mud delivery pipeline 6.
A method for oil field injected water fixed point up to standard deliming dirt, comprises the following steps:
Steps A: the identification of fluid properties, pH value, ion content and salinity in analysing fluid, determine the water type of fluid.The scaling tendency of convection cell and mistake calcium rate are carried out analysis and prediction simultaneously, determine the temperature of fouling and the flow velocity of water.
Step B: according to steps A to oil field recharged waste water, water supply well clear water, and mixing clean water with sewage Heshui, compatibility relationship between local water, screen a kind of novel quick fouling agent, this medicament can make the fluid of different water type rapidly calcium dirt be separated out to precipitation afterwards in mixing at short notice, to reach the object except the middle calcium dirt that anhydrates.By Lab-evaluation, analyze, filtered out the quick fouling agent of ASA type.This medicament main component is sodium phosphate and the composite material of polyacrylamide, adopts continuous dropping mode, and chemical feeding quantity is 30-40%.Lab simulation is at 20-40 ℃, and static deliming rate, more than 60%, is detained settling time 10-15min.By dynamic analog test, determine that rate of flow of fluid is 0.2-0.75m/s.Finally according to reaction times and the relation of being detained the settling time, can determine size and the capacity of water filling surge tank.
Step C: the lower end of water filling surge tank is sewage inlet pipeline 3, pipeline, above water filling surge tank spoil disposal sucker, guarantees can not make calcium dirt and other throw outs on sucker produce disturbance because of water yield fluctuation, and effect is removed in impact.Clear water source line 2, directly over sewage inlet pipeline, is concentric tube structure.Inner tube is dosing pipeline 4, by dosing pump 1, adds the quick fouling agent of ASA.The annular space region of inner and outer tubes is the clear water region of flowing through.This concentric tube is at water filling surge tank internal upper part stringing, and concentric tube end inner tube is slightly longer than outer tube, and guaranteeing can be because of the accumulation blocking pipeline of calcium dirt.The inside and outside comb line of tank is arranged at tank body top.Water filling surge tank opposite side, spoil disposal outlet line 6 tops are provided with water outlet pipeline 5, and this pipeline adopts overhead design, outlet position will be higher than the position of next flow process entrance, to guarantee under the condition of gravitional force, the liquid after processing can flow to next flow process automatically, without carrying by pump.
Step D: when clear water production need to be noted in oil field, close sewer pipeline 3, open dosing pump 1 and clear water source line 2 and concentric dosing pipeline 4 thereof.The quick fouling agent of ASA can fully contact with clear water in water filling surge tank, and the calcium dirt of generation is deposited in action of gravity and is lowered into spoil disposal outlet at the bottom of tank.Clear water after deliming dirt flows out along the overhead water outlet pipeline 5 on tank body top, automatically flow to next flow process.
Step e: when sewage production need to be noted in oil field, close clear water source line 2, open sewage inlet pipeline 3, the quick fouling agent of ASA dosing pipeline 4 and dosing pump 1.The quick fouling agent of ASA can fully contact with sewage in water filling surge tank, and the calcium dirt of generation is deposited in action of gravity and is lowered into spoil disposal outlet at the bottom of tank.Sewage after deliming dirt flows out along the overhead water outlet pipeline 5 on tank body top, automatically flow to next flow process.
Step F: while removing contamination mixed water injection as needs, simultaneously open dosing pump 1, sewer pipeline 3, clear water pipeline 2 and dosing pipeline 4.The quick fouling agent of ASA can fully contact with mixing water in water filling surge tank, and the calcium dirt of generation is deposited in action of gravity and is lowered into spoil disposal outlet at the bottom of tank.Mixing water after deliming dirt flows out along the overhead water outlet pipeline 5 on tank body top, automatically flow to next flow process.
Step G: under standard state, according to knot calcium dirt speed and knot calcium dirt amount, when calcium dirt is tied to a certain extent at the bottom of tank, open spoil disposal outlet line 6, can under the condition not stopping production, calcium dirt be expelled to outside surge tank.If carry out maintenance and maintenance in tank, close after dosing pump 1, sewage inlet pipeline 3, clear water source line 2 and concentric tube dosing pipeline 4, open water outlet pipeline 5 pot liquid is emptying, open spoil disposal and export at the bottom of 6 drain tanks after dirt, by manhole 7, enter in tank and normally overhaul.
Embodiment 2: as shown in Figure 1,
A fixed point deliming dirt device, sewer pipeline 3 is placed in manhole 7 belows of water filling surge tank bottom, and the quick fouling agent of clear water source line 2 and ASA dosing pipeline 4 is concentric structure pipeline, and inner tube is the quick fouling agent of ASA dosing pipeline 4; Concentric structure entrance is above the sewage inlet pipeline 3 of water filling surge tank bottom and manhole 7; The quick fouling agent of ASA dosing pipeline 4 is connected with dosing pump 1; Concentric structure pipeline is first drawn pipeline to rise to tank body top by 90 ° of steering knuckles near water filling surge tank inwall, and concentric structure pipeline causes tank body middle part middle position by another 90 ° of steering knuckles by pipeline again; Concentric structure pipe end adopts bell-mouth structure of air, and the outer tube caliber of bell-mouth structure of air is greater than the caliber of entrance, and inner tube diameter remains unchanged, and end inner tube Length Ratio outer tube is long 25mm slightly; The intake of water filling surge tank opposite side top connecting water pipe line 5, water pipeline 5 prolongs water filling surge tank inwall to downward-extension, and water pipeline 5 causes tank body outside by 90 ° of steering knuckles by pipeline; The outlet of water outlet pipeline 5 is positioned at directly over spoil disposal outlet 6, and water outlet pipeline 5 positions are higher than the entry position of next flow process; Water filling surge tank bottom is sucker structure, by a mud delivery pipeline 6, causes tank outer vent.
After up to standard for injection water quality, still exist water type to be incompatible, and the situation that finally causes equipment installation fouling, reservoir to stop up, study a kind of oilfield injection water fixed point deliming dirt device, make different water type and have the injected water of knot calcium dirt trend before reinjection into reservoir, to carry out advanced treatment one time, to reach the object of concentrating knot calcium dirt and getting rid of.Meanwhile, coordinate the use of novel quick fouling agent, can accelerate clear water, sewage, mixing clean water with sewage Heshui and in this specific device, fix a point to tie calcium dirt and sink, finally concentrate discharge, reach the object of quick deliming dirt.By using this device, finally meeting under injection water quality prerequisite up to standard, reach compatibility with resident fluid, to avoid tying calcium dirt and stop up reservoir, impact is produced.
A kind of method of oilfield injection water fixed point deliming dirt; Water before re-injection is once concentrated to the processing of the degree of depth, before having two kinds of water extractions tying calcium dirt trend, in a specific device, mix, become passive antiscale into initiatively fouling, by adding chemical agent, calcium dirt is tied in specified location or region at this device fast, finally concentrates and removes.This invention not only meets injection water quality standard, and water quality and the reservoir fluid compatibility of re-injection simultaneously guarantee that subsequent technique is not because knot calcium dirt problem causes stop production to overhaul and stops up reservoir.
The utility model object is a newly-built non-pressure vessel tank, make different water type, have the injected water of scaling tendency can concentrate mixing in this container, and coordinate the use of novel quick fouling agent, make clear water, sewage, mixing clean water with sewage Heshui can in this specific device, concentrate fixed point knot calcium dirt, and concentrate and discharge, reach the object of scale removal.
This non-pressure vessel tank is to take oil-field flooding surge tank to form as body design.Tank holds size can determine size and the capacity of water filling surge tank according to the relation of daily water-injection rate, medicament reaction times and calcium dirt delay settling time.
If diameter is D at the bottom of tank, height is h.According to flow velocity and processing requirement, can determine the position of the good sewage inlet pipeline of clear water source line.
Field requirement sewage inlet pipeline 3 is placed in water filling surge tank bottom, and manhole 7 belows are 0.2h apart from height at the bottom of tank.Pipeline adopts the even portion of round about manner liquid in water filling surge tank.For ease of timely snaking with enter tank maintenance, manhole 7 intended diameter are 0.1h, apart from height at the bottom of tank, are 0.1h.
The quick fouling agent of clear water source line 2 and ASA dosing pipeline 4 adopts concentric design, and inner tube is the quick fouling agent of ASA dosing pipeline 4, and inner and outer pipes annular space is the clear water region of flowing through.Entrance is placed in water filling surge tank bottom, and the top of sewage inlet pipeline 3 and manhole 7 is 0.3h apart from height at the bottom of tank.The quick fouling agent of ASA dosing pipeline 4 adopts and is firmly connected with dosing pump 1.Concentric tube is first drawn pipeline to rise to tank body top by 90 ° of steering knuckles near water filling surge tank inwall, and then by another 90 ° of steering knuckles, pipeline is caused to tank body middle part middle position.Concentric tube end adopts hydraucone design, and outer tube caliber is greater than the caliber of entrance, and inner tube diameter remains unchanged, and end inner tube Length Ratio outer tube is long 25mm slightly.
Tank body opposite side sets out the intake of water pipeline 5 apart from tank deck 0.2h place, pipeline prolongs water filling surge tank inwall to downward-extension, and by 90 ° of steering knuckles, pipeline is caused to tank body outside.The outlet of water outlet pipeline 5, apart from 0.4h at the bottom of tank, is positioned at directly over spoil disposal outlet 6, and position is higher than the entry position of next flow process.Water filling surge tank bottom centre arranges the sucker that diameter is 0.9D, and sucker is collected mouth and caused tank outer vent by a mud delivery pipeline 6.Mud delivery pipeline 6 is apart from height 0.2h at the bottom of tank.
During normal production, by dosing pump 1, in tank, add the quick fouling agent of ASA.This medicament main component is sodium phosphate and the composite material of polyacrylamide.This quick fouling agent adopts continuous dropping mode, and adding consistency is 30-40%.Lab simulation is at 20-40 ℃, and static deliming rate, more than 60%, is detained settling time 10-15min.By dynamic analog test, determine that rate of flow of fluid is 0.2-0.75m/s, fast fouling agent can with water in Ca
2+reaction, generates precipitation and sinks rapidly in 15min.
According to field produces actual needs, the by-pass valve control in technique can carry out flow process switching, realizes single clear water, single sewage and mixed water injection of removing contamination noted noted.If desired note clear water and produce, close sewage inlet pipeline 3, open dosing pump 1 and clear water pipeline 2 and dosing pipeline 4.When sewage production need to be noted in oil field, close clear water source line 2, open sewer pipeline 3, the quick fouling agent of ASA dosing pipeline 4 and dosing pump 1.As needs are taked the mixed water injection of removing contamination, open dosing pump 1, sewer pipeline 3, clear water pipeline 2 and concentric tube dosing pipeline 4 simultaneously.The quick fouling agent of ASA can fully contact with clear water, sewage or mixing clean water with sewage Heshui in water filling surge tank, and the calcium dirt producing in 15min is deposited in action of gravity and is lowered into spoil disposal outlet at the bottom of tank.Water after deliming dirt flows out the water outlet pipeline along tank body top 5, automatically flow to next flow process.
As mentioned above, embodiment of the present utility model is explained, but as long as not departing from fact inventive point of the present utility model and effect can have a lot of distortion, this will be readily apparent to persons skilled in the art.Therefore, within such variation is also all included in protection domain of the present utility model.
Claims (1)
1. a device for oilfield injection water fixed point deliming dirt, is characterized in that sewer pipeline is placed in the manhole below of water filling surge tank bottom, and the quick fouling agent of clear water source line and ASA dosing pipeline is concentric structure pipeline, and inner tube is the quick fouling agent of ASA dosing pipeline; Concentric structure entrance is above the sewage inlet pipeline of water filling surge tank bottom and manhole; The quick fouling agent of ASA dosing pipeline is connected with dosing pump; Concentric structure pipeline is first drawn pipeline to rise to tank body top by 90 ° of steering knuckles near water filling surge tank inwall, and concentric structure pipeline causes tank body middle part middle position by another 90 ° of steering knuckles by pipeline again; Concentric structure pipe end adopts bell-mouth structure of air, and the outer tube caliber of bell-mouth structure of air is greater than the caliber of entrance, and inner tube diameter remains unchanged, and end inner tube Length Ratio outer tube is long 25mm slightly; The intake of water filling surge tank opposite side top connecting water pipe line, water pipeline prolongs water filling surge tank inwall to downward-extension, and water pipeline causes tank body outside by 90 ° of steering knuckles by pipeline; The outlet of water outlet pipeline is positioned at directly over spoil disposal outlet, and rising pipe line position is higher than the entry position of next flow process; Water filling surge tank bottom is sucker structure, by a mud delivery pipeline, causes tank outer vent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320499714.2U CN203419784U (en) | 2013-08-15 | 2013-08-15 | Oilfield injection water fixed-point calcium scale removal device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320499714.2U CN203419784U (en) | 2013-08-15 | 2013-08-15 | Oilfield injection water fixed-point calcium scale removal device |
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| CN203419784U true CN203419784U (en) | 2014-02-05 |
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ID=50018884
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| CN201320499714.2U Expired - Fee Related CN203419784U (en) | 2013-08-15 | 2013-08-15 | Oilfield injection water fixed-point calcium scale removal device |
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|---|---|
| CN (1) | CN203419784U (en) |
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2013
- 2013-08-15 CN CN201320499714.2U patent/CN203419784U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |