CN108086963A - The low Additional pressure differential sand-preventing process method of oil well - Google Patents
The low Additional pressure differential sand-preventing process method of oil well Download PDFInfo
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- CN108086963A CN108086963A CN201611067519.7A CN201611067519A CN108086963A CN 108086963 A CN108086963 A CN 108086963A CN 201611067519 A CN201611067519 A CN 201611067519A CN 108086963 A CN108086963 A CN 108086963A
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- sand
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- oil
- gravel
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/02—Scrapers specially adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/04—Gravelling of wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
Abstract
The present invention provides a kind of oil well low Additional pressure differential sand-preventing process method, and the low Additional pressure differential sand-preventing process method of the oil well includes：Step 1, pit shaft preparation is carried out, former well casing column is played, carries out spy sand washing, drifting, pipe cleaning, and carry out oil pipe, casing pressure test；Step 2, formation pre processing is carried out, after running string, opens oil pipe gate control open flow, and carries out nitrogen foam and returns row, spy sand washing, well-flushing；Step 3, gravel filling sand prevention construction is carried out；Step 4, the sand control construction of suspension sand screen is carried out；Step 5, carry out squeezing anti-adsorbent construction.The low Additional pressure differential sand-preventing process method of the oil well can reduce water drive, it is poly- drive, it is poly- turn the nearly well gravel packing zone of subsequent waterflooding oil reservoir oil well and pit shaft sand block layer additional drag, be that loose sand oil accumulation middle and later periods oil well extract produces most effective sand-preventing process.
Description
Technical field
The present invention relates to oil field development technical fields, especially relate to a kind of low Additional pressure differential sand-preventing process side of oil well
Method.
Background technology
Loose sand oil accumulation is one of emphasis of Shengli Oil Field exploitation, such oil reservoir loose cementation, in development process
It easily shakes out, gravel filling sand prevention is to ensure one of major measure that such oil reservoir is normally developed.Conventional type gravel packing sand control pack
Leakiness, reservoir sand is mixed with back-up sand makes filling layer flow conductivity become smaller, and Additional pressure differential is big, and oil well liquid measure declines after driving a well
Soon, the exploitation of loose sand oil accumulation economical and efficient is constrained.We have invented a kind of low Additional pressure differential sand control works of new oil well therefore
Process solves more than technical problem.
The content of the invention
The object of the present invention is to provide a kind of raising loose sand water drive, poly- drive, subsequent waterflooding oil reservoir oil well output, extensions
The low Additional pressure differential sand-preventing process method of oil well of sand control life.
The purpose of the present invention can be achieved by the following technical measures：The low Additional pressure differential sand-preventing process method of oil well, the oil
The low Additional pressure differential sand-preventing process method of well includes：Step 1, pit shaft preparation is carried out, former well casing column is played, carries out spy sand washing, drifting is scraped
Pipe, and carry out oil pipe, casing pressure test；Step 2, formation pre processing is carried out, after running string, opens oil pipe gate control open flow,
And carry out nitrogen foam and return row, visit sand washing, well-flushing；Step 3, gravel filling sand prevention construction is carried out；Step 4, suspension filter sand is carried out
Pipe sand control is constructed；Step 5, carry out squeezing anti-adsorbent construction.
The purpose of the present invention can be also achieved by the following technical measures：
Step 1 includes：
(1) former well casing column is played：It acts former well flow string, salvages former well sand-proof pipe, observe former well casing column damage and shaft bottom
Junk situation；
(2) sand washing is visited：Lower blank tubing band horn mouth visits sand washing to artificial bottom of a well, removes remaining sand in well, discharge capacity 300L/min
~600L/min；
(3) drifting, pipe cleaning：Lower gauguste cutter passes to artificial bottom of a well, tripping in casing pipeline scraper pipe cleaning, scraping to artificial bottom of a well,
Pipe cleaning speed is less than 20 pieces/hour, with the abundant anti-flushing well of this area sewage, discharge capacity 300L/min~600L/min, until by well
Until interior foul is gone out completely；
(4) oil pipe, casing pressure test：To oil pipe pressure test 35MPa, voltage stabilizing 5min, pressure drop is less than 0.5MPa for qualification；Setting of casing
Pressure test tool, old well pressure testing 12MPa, new well pressure testing 15MPa, 5min are not reduced to qualification.
Step 2 includes：
(1) tubing string tripping in：By de-plugging process tubing string at design position, 20 meters of the oil reservoir upper bound, sleeve valve is closed, to
Certain density depolymerizing agent, Compound-acid, foaming agent these blockages relieving fluids, termination of pumping reaction 3h-6h are injected in stratum, and injection rate is
300L/min~600L/min, injection rate Q are according to formula Q=ψ π r2H is calculated, and plug removal radius r is 1m~2m；
(2) it is 0MPa to open oil pipe gate and control open flow to well head pressure；
(3) nitrogen foam returns row：It is 0.2g/cm with density3~0.5g/cm3Low-density nitrogen foam, direct flushing
Two Xun Huans, injection rate are 300L/min~600L/min, by the residual sour and its abundant backwash of reactant to ground, the row's of returning raffinate
When to control outlet, outlet liquid measure is kept to stablize, and pH value is surveyed with pH test paper, observation outlet raffinate situation is in pH value is
Property, adjacent to oil well area polymer, inorganic particle these tampers are released, tamper absorption, migration is avoided to block pack gravel
Pore throat；
(4) sand washing, well-flushing are visited：Sand washing is visited to artificial bottom of a well, with the abundant anti-flushing well of this area sewage, discharge capacity 500L/min~
600L/min until foul is gone out completely in by well, acts de-plugging tubing string.
Step 3 includes：
(1) tubing string tripping in：Tripping in filling anti-sand process pipe string is to design position；
(2) gravel filling sand prevention：Small particle gravel is filled to earth formation deep, grain size of gravel intermediate value is 4-6 times of formation particle
Footpath intermediate value, nearly well and borehole are hot on the trail of the big grain size gravel of filling, and big grain size gravel intermediate value is 2-3 times of small particle gravel intermediate value, is improved
Filling layer flow conductivity reduces filling layer Additional pressure differential, and using high sand ratio, average sand is than 30%-40%, most high sand ratio 60%-
80%th, it is high to add these construction parameters of sand intensity, filling layer compactness is improved, slows down or stratum fine silt migration is avoided to block being formed
Mulling band reduces the flow conductivity of anti-layer of sand, and scene adjusts operational discharge capacity, sand feeding amount according to pressure, and pump truck, which cannot have, during filling stops
Vehicle or gear shift happen；
(3) anti-flushing well：Quick back brake door, carries out anti-flushing well, reacting cycle well-flushing 2 weeks or more, pump truck output 300L/min with
On, wash out pipe in extra gravel, until returning fluid without sand and totally until；
(4) operating tool string is played：After well head pressure is zero, well head is torn open, act operating tool string, complete sand control treatment.
Step 4 includes：
(1) drifting：Lower gauguste cutter passes to artificial bottom of a well, with the abundant anti-flushing well of this area sewage, discharge capacity 300L/min~
600L/min, until the foul in well is gone out completely；
(2) tripping in sand control pipe：Will hang sand screen sand control pipe tripping in design position, suspension sand screen sand control pipe from
Under be up followed successively by silk plug, tubing nipple, high infiltration sand filter pipe, blank tubing, packer, oil pipe to well head, pit shaft suspension had
Flow area is big, the high infiltration sand filter pipe of new type resin of the high feature of permeability, reduces sand control screen additional drag；Tubing string tripping in process
In, forbid to carry suddenly and put suddenly；It is required that avoid casing coupling；
(3) it is setting, give up：To after design position under sand control pipe, ground pump truck pipeline is connected, is built the pressure from oil pipe, slowly
Rise to voltage stabilizing 3min, test tubing string 3-5t after 18MPa, determine it is setting after the completion of, upper lifting pipe post to former suspending weight rotates forward tubing string 40
Circle is above to be completed to give up, and acts Back-off Pipe String.
Step 5 includes：
(1) tubing string tripping in：By blank tubing down toward design position, tail depth stays on well top of fish 5 meters for sand control pipe, closes casing
Valve injects certain density anti-adsorbent to stratum, and termination of pumping reaction 1h-3h reduces polymer and adsorbed in gravel packing zone, drop
Low gravel filling sand prevention Additional pressure differential, improve oil well liquid measure, injection rate be 300L/min~600L/min, injection rate Q foundations
Formula Q=ψ π r2H is calculated, and reaction radius r is 1m~3m；
(2) pump production under, liquid measure stablize after by design production system stage by stage the control of extract producing initial stage liquid measure 10 tons/
My god, in 10-20 days later stages, extract production, extract amplitude is no more than liquid measure 30-50% early period.
The low Additional pressure differential sand-preventing process method of oil well in the present invention in order to reduce gravel filling sand prevention Additional pressure differential, is fitted
For water drive, poly- drive, the low Additional pressure differential sand control of subsequent waterflooding oil reservoir, using " solution, row prevent " technical thought, mating use is integrated
The technologies such as row, high sand ratio filling, the filling of gravel change grain size, high permeability sand screen, anti-adsorbent are returned in de-plugging, reduce gravel
Filling anti-sand Additional pressure differential improves oil well liquid measure.The low Additional pressure differential sand-preventing process of oil well can reduce water drive, it is poly- drive, it is poly- turn after
Continue the nearly well gravel packing zone of water-drive pool oil well and pit shaft sand block layer additional drag, be loose sand oil accumulation middle and later periods oil well extract
Produce most effective sand-preventing process.
Description of the drawings
Fig. 1 is the flow chart of a specific embodiment of the low Additional pressure differential sand-preventing process method of oil well of the present invention.
Specific embodiment
For enable the present invention above and other objects, features and advantages be clearer and more comprehensible, it is cited below particularly go out preferable implementation
Example, and coordinate shown in attached drawing, it is described in detail below.
As shown in Figure 1, Fig. 1 is the flow chart of the low Additional pressure differential sand-preventing process method of oil well of the present invention.
Step 101. pit shaft prepares
(1) former well casing column is played：It acts former well flow string, salvages former well sand-proof pipe, observe former well casing column damage and shaft bottom
Junk situation.
(2) sand washing is visited：Lower blank tubing band horn mouth visits sand washing to artificial bottom of a well, removes remaining sand in well, discharge capacity 300L/min
~600L/min.
(3) drifting, pipe cleaning：Lower gauguste cutter passes to artificial bottom of a well.Tripping in casing pipeline scraper pipe cleaning, scraping to artificial bottom of a well,
Pipe cleaning speed is less than 20 pieces/hour.With the abundant anti-flushing well of this area sewage, discharge capacity 300L/min~600L/min, until by well
Until interior foul is gone out completely.
(4) oil pipe, casing pressure test：To oil pipe pressure test 35MPa, voltage stabilizing 5min, pressure drop is less than 0.5MPa for qualification.Setting of casing
Pressure test tool, pressure testing 12MPa (old well), 15MPa (new well), 5min is not reduced to qualification.
Step 102. formation pre processing (de-plugging construction)
(1) tubing string tripping in：By de-plugging process tubing string (blank tubing or blank tubing+suction pump) down toward design position (on oil reservoir
At 20 meters of boundary), sleeve valve is closed, injects the blockages relieving fluids such as certain density depolymerizing agent, Compound-acid, foaming agent, termination of pumping to stratum
3h-6h is reacted, injection rate is 300L/min~600L/min, and injection rate is according to formula Q=ψ π r2H is calculated, and plug removal radius is
1m~2m；
(2) it is 0MPa to open oil pipe gate and control open flow to well head pressure；
(3) nitrogen foam returns row：It is 0.2g/cm with density3~0.5g/cm3Low-density nitrogen foam, direct flushing
Two Xun Huans, injection rate are 300L/min~600L/min, by the residual sour and its abundant backwash of reactant to ground, the row's of returning raffinate
When to control outlet, outlet liquid measure is kept to stablize, and pH value is surveyed with pH test paper, observation outlet raffinate situation is in pH value is
Property, the tampers such as adjacent to oil well area polymer, inorganic particle are released, tamper absorption, migration is avoided to block pack gravel hole
Larynx；
(4) sand washing, well-flushing are visited：Sand washing is visited to artificial bottom of a well, with the abundant anti-flushing well of this area sewage, discharge capacity 500L/min~
600L/min until foul is gone out completely in by well, acts de-plugging tubing string.
Step 103. gravel filling sand prevention is constructed
(1) tubing string tripping in：Tripping in filling anti-sand process pipe string is to design position；
(2) gravel filling sand prevention：Small particle gravel is filled to earth formation deep, grain size of gravel intermediate value is 4-6 times of formation particle
Footpath intermediate value, nearly well and borehole are hot on the trail of the big grain size gravel of filling, and big grain size gravel intermediate value is 2-3 times of small particle gravel intermediate value, is improved
Filling layer flow conductivity reduces filling layer Additional pressure differential, and using high sand ratio, average sand is than 30%-40%, most high sand ratio 60%-
80%th, it is high to add these construction parameters of sand intensity, filling layer compactness is improved, slows down or stratum fine silt migration is avoided to block being formed
Mulling band reduces the flow conductivity of anti-layer of sand, and scene adjusts operational discharge capacity, sand feeding amount according to pressure, and pump truck, which cannot have, during filling stops
Vehicle or gear shift happen；
(3) anti-flushing well：Quick back brake door, carries out anti-flushing well, reacting cycle well-flushing 2 weeks or more, pump truck output 300L/min with
On, wash out pipe in extra gravel, until returning fluid without sand and totally until；
(4) operating tool string is played：After well head pressure is zero, well head is torn open, act operating tool string, complete sand control treatment.
Step 104. suspension sand screen sand control construction
(1) drifting：Lower gauguste cutter passes to artificial bottom of a well.With the abundant anti-flushing well of this area sewage, discharge capacity 300L/min~
600L/min, until the foul in well is gone out completely.
(2) tripping in sand control pipe：Will hang sand screen sand control pipe tripping in design position, suspension sand screen sand control pipe from
Under be up followed successively by silk plug, tubing nipple, high infiltration sand filter pipe, blank tubing, packer, oil pipe to well head.Pit shaft suspension had
The high infiltration sand filter pipe of new type resin for the features such as flow area is big, permeability is high reduces sand control screen additional drag；Tubing string tripping in process
In, forbid to carry suddenly and put suddenly；It is required that avoid casing coupling.
(3) it is setting, give up：To after design position under sand control pipe, ground pump truck pipeline is connected, is built the pressure from oil pipe, slowly
Rise to voltage stabilizing 3min, test tubing string 3-5t after 18MPa, determine it is setting after the completion of, upper lifting pipe post to former suspending weight rotates forward tubing string 40
Circle is above to be completed to give up, and acts Back-off Pipe String.
Step 105. squeezes anti-adsorbent construction
(1) tubing string tripping in：By blank tubing down toward design position (tail depth stays on well top of fish 5 meters for sand control pipe), set is closed
Tube valve injects certain density anti-adsorbent (compositions such as cationic surfactant, chelating agent), termination of pumping reaction to stratum
1h-3h, reducing polymer, (anti-adsorbent can reduce polymer in pack gravel surface excess 90% in gravel packing zone absorption
More than), gravel filling sand prevention Additional pressure differential is reduced, improves oil well liquid measure.Injection rate is 300L/min~600L/min, is injected
Amount is according to formula Q=ψ π r2H is calculated, and reaction radius is 1m~3m；
(2) pump production under, liquid measure stablize after by design production system stage by stage the control of extract producing initial stage liquid measure 10 tons/
My god, in 10-20 days later stages, extract production, extract amplitude is no more than liquid measure 30-50% early period.
The low Additional pressure differential sand-preventing process method of oil well in the present invention, integrate it is mating using de-plugging mixing, become grain size filling,
The technologies such as high permeability sand screen, preventing polymer absorption have reached " solution, row prevent " purpose, have reduced anti-layer of sand and add pressure
Difference；High sand ratio fills the compactness for improving gravel packing zone, slows down or avoid stratum fine silt migration blocking filling layer hole
Larynx improves the flow conductivity of anti-layer of sand.
Claims (6)
1. the low Additional pressure differential sand-preventing process method of oil well, which is characterized in that the low Additional pressure differential sand-preventing process method of the oil well includes：
Step 1, pit shaft preparation is carried out, former well casing column is played, carries out spy sand washing, drifting, pipe cleaning, and carry out oil pipe, casing pressure test；
Step 2, formation pre processing is carried out, after running string, opens oil pipe gate control open flow, and carries out nitrogen foam and returns row,
Visit sand washing, well-flushing；
Step 3, gravel filling sand prevention construction is carried out；
Step 4, the sand control construction of suspension sand screen is carried out；
Step 5, carry out squeezing anti-adsorbent construction.
2. the low Additional pressure differential sand-preventing process method of oil well according to claim 1, which is characterized in that step 1 includes：
(1) former well casing column is played：It acts former well flow string, salvages former well sand-proof pipe, observe former well casing column damage and bottom hole falling article
Situation；
(2) sand washing is visited：Lower blank tubing band horn mouth visits sand washing to artificial bottom of a well, removes remaining sand in well, and discharge capacity 300L/min~
600L/min；
(3) drifting, pipe cleaning：Lower gauguste cutter passes to artificial bottom of a well, tripping in casing pipeline scraper pipe cleaning, scraping to artificial bottom of a well, pipe cleaning
Speed is less than 20 pieces/hour, with the abundant anti-flushing well of this area sewage, discharge capacity 300L/min~600L/min, until will be in well
Until foul is gone out completely；
(4) oil pipe, casing pressure test：To oil pipe pressure test 35MPa, voltage stabilizing 5min, pressure drop is less than 0.5MPa for qualification；Setting of casing pressure testing
Instrument, old well pressure testing 12MPa, new well pressure testing 15MPa, 5min are not reduced to qualification.
3. the low Additional pressure differential sand-preventing process method of oil well according to claim 1, which is characterized in that step 2 includes：
(1) tubing string tripping in：By de-plugging process tubing string at design position, 20 meters of the oil reservoir upper bound, sleeve valve is closed, to stratum
Inject certain density depolymerizing agent, Compound-acid, foaming agent these blockages relieving fluids, termination of pumping reaction 3h-6h, injection rate 300L/min
~600L/min, injection rate Q are according to formula Q=ψ π r2H is calculated, and plug removal radius r is 1m~2m；
(2) it is 0MPa to open oil pipe gate and control open flow to well head pressure；
(3) nitrogen foam returns row：It is 0.2g/cm with density3~0.5g/cm3Low-density nitrogen foam, direct flushing two
Cycle, injection rate are 300L/min~600L/min, and by residual acid and its abundant backwash of reactant to ground, when row of returning raffinate is wanted
Control outlet, keep outlet liquid measure stablize, and with pH test paper survey pH value, observation outlet raffinate situation until pH value for neutrality, solve
Except adjacent to oil well area polymer, inorganic particle these tampers, tamper absorption, migration is avoided to block pack gravel pore throat；
(4) sand washing, well-flushing are visited：Sand washing is visited to artificial bottom of a well, with the abundant anti-flushing well of this area sewage, discharge capacity 500L/min~
600L/min until foul is gone out completely in by well, acts de-plugging tubing string.
4. the low Additional pressure differential sand-preventing process method of oil well according to claim 1, which is characterized in that step 3 includes：
(1) tubing string tripping in：Tripping in filling anti-sand process pipe string is to design position；
(2) gravel filling sand prevention：Small particle gravel is filled to earth formation deep, grain size of gravel intermediate value is in 4-6 times of reservoir sand grain size
Value, nearly well and borehole are hot on the trail of the big grain size gravel of filling, and big grain size gravel intermediate value is 2-3 times of small particle gravel intermediate value, improves filling
Layer flow conductivity, reduces filling layer Additional pressure differential, using high sand ratio, average sand than 30%-40%, most high sand ratio 60%-80%,
Height adds these construction parameters of sand intensity, improves filling layer compactness, slows down or stratum fine silt migration is avoided to block forming mulling
With the flow conductivity for reducing anti-layer of sand, scene adjusts operational discharge capacity, sand feeding amount according to pressure, during filling pump truck cannot have parking or
Person's gear shift happens；
(3) anti-flushing well：Quick back brake door, carries out anti-flushing well, and reacting cycle well-flushing 2 weeks or more, more than pump truck output 300L/min is washed
Extra gravel in outlet pipe, until returning fluid without sand and it is clean until；
(4) operating tool string is played：After well head pressure is zero, well head is torn open, act operating tool string, complete sand control treatment.
5. the low Additional pressure differential sand-preventing process method of oil well according to claim 1, which is characterized in that step 4 includes：
(1) drifting：Lower gauguste cutter passes to artificial bottom of a well, with the abundant anti-flushing well of this area sewage, discharge capacity 300L/min~600L/
Min, until the foul in well is gone out completely；
(2) tripping in sand control pipe：Sand screen sand control pipe tripping in design position will be hung, suspension sand screen sand control pipe is from lower past
On be followed successively by silk plug, tubing nipple, high infiltration sand filter pipe, blank tubing, packer, oil pipe to well head, pit shaft suspension has flow-passing surface
Product is big, the high infiltration sand filter pipe of new type resin of the high feature of permeability, reduces sand control screen additional drag；During tubing string tripping in, sternly
Prohibit to carry suddenly and put suddenly；It is required that avoid casing coupling；
(3) it is setting, give up：To after design position under sand control pipe, ground pump truck pipeline is connected, is built the pressure from oil pipe, slowly risen
Voltage stabilizing 3min after to 18MPa, test tubing string 3-5t, determine it is setting after the completion of, upper lifting pipe post to former suspending weight, rotate forward tubing string 40 enclose with
Upper completion is given up, and acts Back-off Pipe String.
6. the low Additional pressure differential sand-preventing process method of oil well according to claim 1, which is characterized in that step 5 includes：
(1) tubing string tripping in：By blank tubing down toward design position, tail depth stays on well top of fish 5 meters for sand control pipe, closes casing valve
Door injects certain density anti-adsorbent to stratum, and termination of pumping reaction 1h-3h reduces polymer and adsorbed in gravel packing zone, reduced
Gravel filling sand prevention Additional pressure differential improves oil well liquid measure, and injection rate is 300L/min~600L/min, and injection rate Q is according to public
Formula Q=ψ π r2H is calculated, and reaction radius r is 1m~3m；
(2) pump production under, by design production system, extract producing initial stage liquid measure is controlled in 10 ton days stage by stage after liquid measure is stablized,
10-20 days later stages, extract production, extract amplitude are no more than liquid measure 30-50% early period.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109209299A (en) * | 2018-08-14 | 2019-01-15 | 韩阳 | A kind of saturation filling of wellbore periphery can the cementing gravel manufacture of intraocular borehole wall method |
| CN109869121A (en) * | 2019-03-18 | 2019-06-11 | 中国石油化工股份有限公司 | The mechanical sand control technique of small casing pipe well |
| CN110043218A (en) * | 2019-04-04 | 2019-07-23 | 中国石油天然气股份有限公司 | Gravel pack methods |
| CN111236906A (en) * | 2018-11-29 | 2020-06-05 | 中国石油化工股份有限公司 | Method for improving fracture complexity through normal-pressure or deep shale gas main fracture deep plugging |
| CN113530438A (en) * | 2020-04-16 | 2021-10-22 | 中国石油化工股份有限公司 | Method for safely tripping up and down gas well nitrogen drilling pipe column and gas well structure |
| US11927082B2 (en) | 2019-02-20 | 2024-03-12 | Schlumberger Technology Corporation | Non-metallic compliant sand control screen |
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| CN111236906B (en) * | 2018-11-29 | 2022-06-10 | 中国石油化工股份有限公司 | Method for improving fracture complexity through normal-pressure or deep shale gas main fracture deep plugging |
| US11927082B2 (en) | 2019-02-20 | 2024-03-12 | Schlumberger Technology Corporation | Non-metallic compliant sand control screen |
| CN109869121A (en) * | 2019-03-18 | 2019-06-11 | 中国石油化工股份有限公司 | The mechanical sand control technique of small casing pipe well |
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