CN109083621A - A kind of horizontal well coiled tubing composite blockage relieving method - Google Patents
A kind of horizontal well coiled tubing composite blockage relieving method Download PDFInfo
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- CN109083621A CN109083621A CN201810849946.3A CN201810849946A CN109083621A CN 109083621 A CN109083621 A CN 109083621A CN 201810849946 A CN201810849946 A CN 201810849946A CN 109083621 A CN109083621 A CN 109083621A
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- coiled tubing
- foam
- acid
- horizontal well
- blockage relieving
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000002131 composite material Substances 0.000 title claims abstract description 23
- 239000006260 foam Substances 0.000 claims abstract description 80
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 70
- 239000002253 acid Substances 0.000 claims abstract description 44
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 35
- 239000007921 spray Substances 0.000 claims abstract description 29
- 238000005406 washing Methods 0.000 claims abstract description 27
- 239000004576 sand Substances 0.000 claims abstract description 25
- 239000007789 gas Substances 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 230000020477 pH reduction Effects 0.000 claims abstract description 10
- 238000005266 casting Methods 0.000 claims abstract description 5
- 238000004090 dissolution Methods 0.000 claims abstract description 5
- 238000009434 installation Methods 0.000 claims abstract description 5
- 239000000243 solution Substances 0.000 claims description 26
- 239000012530 fluid Substances 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000004088 foaming agent Substances 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 6
- 239000004615 ingredient Substances 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000011282 treatment Methods 0.000 claims description 4
- 239000002699 waste material Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 230000002045 lasting effect Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 3
- 239000003381 stabilizer Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 230000003472 neutralizing effect Effects 0.000 claims 1
- 238000004080 punching Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 239000003129 oil well Substances 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting, e.g. eliminating, the deposition of paraffins or like substances
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Cleaning In General (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention discloses a kind of horizontal well coiled tubing composite blockage relieving methods, this method uses coiled tubing, is crushed pit shaft casting bed using the impact force of rotating-spray tool and borehole wall dirt, the tamper of nitrogen foam acid dissolution near wellbore zone and foam negative pressure return the methods of row's dredging oil flow channel and carry out composite blockage relieving.This method comprises: 1) coiled tubing and underground tool string installation；2) configuration of foam (acid) liquid and debugging；3) pit shaft sand washing scale removal is sprayed；4) foamed acid dragging acidification de-plugging；5) foam gas negative pressure is returned to clear and be washed, and carries out composite blockage relieving, realizes that oil well productivity restores.The present invention is strong using the broken impact force of rotating-spray, foam acidizing plugging removal effect is good, negative pressure is returned and arranges thorough, easy to operate, short construction period.
Description
Technical field
The invention belongs to oil/gas well block releasing technique fields, and in particular to a kind of horizontal well coiled tubing composite blockage relieving method.
Background technique
During oil/gas well long-term production, usually there is stratum and spit sand, wax, colloid in crude oil, asphalitine are precipitated, knot
Dirty phenomenon inevitably results in pit shaft sand setting, side-wall begriming and the blocking of near wellbore zone seepage channel, forms compound blocking, sternly
Ghost image rings Oil & Gas Productivity.
For compound blocking horizontal well, the prior art mainly uses mechanical type sand washing scale removal, conventional acidulation etc. single
Form de-plugging.The defect of these techniques is as follows: strata pressure is low, and lost circulation is serious when pit shaft sand washing, and water consumption is big, causes
Oil well productivity restores slow after measure, or even can not restore；Oil pipe, which bores, to be abraded dirty long construction period and is easily damaged casing；It is horizontal
Residual acid returns row not in time after well acidizing construction time length, conventional acidulation, be easy to cause the secondary injury to reservoir；To sum up, existing
There are above-mentioned many defects for solution in technology, not can effectively solve horizontal well complex form blockage problem.
Summary of the invention
It is to utilize coiled tubing the purpose of the present invention is to provide a kind of horizontal well coiled tubing composite blockage relieving method,
Rotating-spray tool is carried, is crushed pit shaft casting bed and borehole wall dirt using impact force, while using the nearly well of nitrogen foam acid dissolution
The tamper of band, foam negative pressure return row's dredging oil flow channel, carry out composite blockage relieving method, achieve the purpose that restore to produce.
The present invention adopts the following technical scheme that realize:
A kind of horizontal well coiled tubing composite blockage relieving method, this method use coiled tubing, utilize rotating-spray tool
Impact force is crushed pit shaft casting bed and borehole wall dirt, the tamper of nitrogen foam acid dissolution near wellbore zone and foam negative pressure return row's dredging oil
The methods of circulation road carries out composite blockage relieving, specifically includes the following steps:
1) coiled tubing is installed: installation coiled tubing reel, coiled tubing injection head, coiled tubing preventer and well head dress
It sets, it is qualified to coiled tubing spraying-preventing system, testing pressure of well head as required, coiled tubing and rotating-spray work in down-hole casing are installed
Near tool string to kickoff point (KOP)；
2) foam solution configuration and debugging: foam washing fluid and foam acid solution have been configured by recipe requirements, and in ground face handle liquid
Tank, pump truck are successively connected with one end of foam maker import threeway, nitrogen vehicle processed, note nitrogen vehicle successively with foam maker import three
The logical other end is connected, and foam maker outlet is connected with coiled tubing, formation foam liquid supply system, and debugged pump truck and
Infuse the discharge capacity of nitrogen vehicle；
3) rotating-spray sand washing scale removal: decentralization coiled tubing and rotating-spray tool string, until the place above 20m in sand face or so
Pump truck, note nitrogen vehicle and foam maker direct circulation injection foam solution are opened, coiled tubing is transferred on marginal not foam solution side, by continuous
The rotating-spray tool string of oil pipe bottom end is crushed sill and borehole wall dirt, carries out sand washing, scale removal operation；
4) it foamed acid dragging acidification de-plugging: after pit shaft sand washing, scale removal to artificial bottom of a well, above mentions to horizontal well bottom and penetrating
At hole section, acid solution is replaced, closes wellhead assembly sleeve gate after acid solution is replaced to perforated interval, acid is just being squeezed to design flow, is above mentioning
Coiled tubing to remaining perforated interval, squeezes acid respectively, carries out acidification de-plugging operation；
5) foam gas negative pressure is returned to clear and be washed: after acid liquid reaction, decentralization coiled tubing to artificial bottom of a well opens casing
Gate is just injecting foam gas by coiled tubing, and marginal not nitrogen side above mentions coiled tubing, and formation fluid is flowed out through oil jacket annulus,
It returns and drains into waste liquid tank, realize lasting shaft bottom negative pressure, drain observation is returned in taking-up, and when returning drain without containing sediment, foam is negative
The pressure row of returning terminates, complete well production.
A further improvement of the present invention lies in that rotating-spray tool string include sequentially connected interior coiled tubing connector, it is double
Valve ball-and-seat, safety are given up and rotating-spray syringe pipe.
A further improvement of the present invention lies in that rotating-spray syringe pipe includes the master with hollow cavity and both ends open
Body is set with bearing and bearing holder (housing, cover) in the circumferential direction of the main body from the inside to the outside, and the end of bearing holder (housing, cover) is connected with syringe pipe, opens up thereon
There are several nozzles being connected to the hollow cavity of main body.
A further improvement of the present invention lies in that offer two groups of 6 nozzles on syringe pipe, every group of nozzle angle respectively with
The axial angle of main body is 45 ° and 90 °.
A further improvement of the present invention lies in that the ingredient of foam washing fluid is by mass percentage are as follows: 0.2% foam stabilizer,
0.5% foaming agent, remaining is clear water, and foam gas is nitrogen, air or CO2；
The ingredient of foam acid solution is by mass percentage are as follows: 1.2%YGJD descaling agent, 0.012%MH-16 corrosion inhibiter,
The acidproof foaming agent of 0.3%SDS, remaining is clear water, and foam gas is nitrogen, air or CO2。
A further improvement of the present invention lies in that foam gas enables to foam washing fluid and foam acid solution in well head condition
Under density be 0.5-0.85g/cm3, keep cementing truck discharge capacity 0.15m3/min-0.30m3/ min, nitrogen vehicle discharge capacity 20-22m processed3/
Min can return drain situation according to scene and freely adjust pump truck and nitrogen vehicle discharge capacity, to keep liquid to have enough half-life period.
A further improvement of the present invention lies in that in step 3), is shaked out situation, carried out extremely according to the length of horizontal well and pit shaft
Few primary circulation sand washing processing, to keep pit shaft clean.
A further improvement of the present invention lies in that during coiled tubing drags acidizing treatment, carrying out just squeezing acid in step 4)
It operates simultaneously, and coiled tubing is carried out to the operation that lifts from the top and puts down at least once in perforated interval, distance is perforated interval or more
0.5m or so.
A further improvement of the present invention lies in that oil pipe squeezes after the completion of acid, and the closing well for carrying out 20-30min is anti-in step 4)
It answers.
A further improvement of the present invention lies in that coiled tubing is in straight well section and lower curved section lowering velocity and upward strain speed
10-15m/min carries out jet flow sand washing scale removal, acidification de-plugging and foam negative pressure in horizontal segment and returns in row's operation process, lowering velocity
It is 2-4m/min with upward strain speed.
The present invention has following beneficial technical effect:
1, coiled tubing can continuously play lower tubular column with Operating Pressure, by by high-pressure rotary jet physics sand-removing unblocking, acid
Change soluble chemistry cleaning de-plugging and foam negative pressure returns and mediates stifled combination together, de-plugging range is more extensive, greatly improves
Plugging removal effect.
2, using rotation sand washing injector, impact force is strong, it is easier to which the hard resistance such as dirt on the sand and the borehole wall of broken consolidation increases
Add the passability and wellbore treatments effect of coiled tubing.
Acidification can release the reservoir pollution of near wellbore zone, link up oil flow channel, restore oil well productivity.Row is returned with foam negative pressure
It combines, foam liquid surface tension is big, and diffusion coefficient is big, it is easy to enter in micro-pore and crack, carry and remove residual acid
Equal impurity reduce residual acid to the secondary injury degree of reservoir.
Detailed description of the invention
Fig. 1 is process flow diagram of the invention.
Fig. 2 is coiled tubing ground installation and down-hole string schematic diagram of the invention.
Fig. 3 is rotating-spray tool string schematic diagram of the invention.
Fig. 4 is rotating-spray syringe pipe schematic diagram of the invention.
Description of symbols: 1, flow container；2, pump truck；3, nitrogen vehicle processed；4, nitrogen vehicle is infused；5, foam maker；6, coiled tubing；
7, coiled tubing reel；8, coiled tubing injection head；9, coiled tubing preventer；10, wellhead assembly；11, waste liquid tank；12, it revolves
Turn spraycan string；13, casing；14, interior coiled tubing connector；15, bivalve ball-and-seat；16, safety is given up；17, rotation spray
Penetrate syringe pipe；17-1, main body；17-2, bearing holder (housing, cover)；17-3, bearing；17-4, syringe pipe；17-5, nozzle.
Specific embodiment
The present invention is made further instructions with reference to the accompanying drawing.
As shown in Figures 1 to 4.A kind of horizontal well coiled tubing composite blockage relieving method provided by the invention, this method use
Coiled tubing 6 is crushed pit shaft casting bed and borehole wall dirt, nitrogen foam acid dissolution near wellbore zone using the impact force of rotating-spray tool
Tamper and foam negative pressure return row's dredging the methods of oil flow channel and carry out composite blockage relieving, comprise the following steps that:
1) coiled tubing is installed: installing coiled tubing reel 7, coiled tubing injection head 8,9 and of coiled tubing preventer
Wellhead assembly 10, it is qualified to coiled tubing spraying-preventing system, testing pressure of well head as required, the coiled tubing 6 in down-hole casing 13 is installed
And near underground rotating-spray tool string 12 to kickoff point (KOP).The rotating-spray tool string 12 includes sequentially connected interior continuous oil
Pipe fitting 14, bivalve ball-and-seat 15, safe give up 16 and rotating-spray syringe pipe 17.Rotating-spray syringe pipe 17 includes in having
The main body 17-1 of cavity body and both ends open is set with bearing 17-3 and bearing holder (housing, cover) in the circumferential direction of main body 17-1 from the inside to the outside
17-2, the end of bearing holder (housing, cover) 17-2 are connected with syringe pipe 17-4, offer several hollow cavities with main body 17-1 thereon and are connected to
Nozzle 17-5.Offer two groups of 6 nozzle 17-5 on syringe pipe 17-4, every group of nozzle 17-5 angle respectively with main body 17-
1 axial angle is 45 ° and 90 °.
2) foam solution configuration and debugging: flushing fluid and acid solution have been configured by recipe requirements, and in ground face handle flow container 1, pump truck
2 are successively connected with one end of 5 import threeway of foam maker, nitrogen vehicle 3 processed, note nitrogen vehicle 4 successively with 5 import threeway of foam maker
The other end be connected, foam maker 5 outlet is connected with coiled tubing 6, formation foam liquid supply system.Turn on pump has debugged pump truck
2 and infuse nitrogen vehicle 4 discharge capacity.
The ingredient of foam washing fluid is by mass percentage are as follows: and 0.2% foam stabilizer, 0.5% foaming agent, remaining is clear water,
Foam gas is nitrogen, air or CO2；
The ingredient of foam acid solution is by mass percentage are as follows: 1.2%YGJD descaling agent, 0.012%MH-16 corrosion inhibiter,
The acidproof foaming agent of 0.3%SDS, remaining is clear water, and foam gas is nitrogen, air or CO2。
3) rotating-spray sand washing scale removal: decentralization coiled tubing 6 and rotating-spray tool string 12, until above 20m in sand face or so
Place opens pump truck 2, note nitrogen vehicle 4 and 5 direct circulation of foam maker injection foam solution, marginal not foam solution side and transfers coiled tubing, lead to
The rotary spray sprinkler 17 for crossing 6 bottom end of coiled tubing is crushed sill and borehole wall dirt, carries out sand washing, scale removal operation.
4) it foamed acid dragging acidification de-plugging: after pit shaft sand washing, scale removal to artificial bottom of a well, above mentions to horizontal well bottom
At (first segment) perforated interval, acid solution is replaced, 10 sleeve gate of wellhead assembly is closed after acid solution is replaced to perforated interval, just squeezes acid
To design flow.Coiled tubing is above mentioned respectively to remaining perforated interval, squeezes acid, carries out acidification de-plugging operation.
5) foam gas negative pressure is returned to clear and be washed: after acid liquid reaction, decentralization coiled tubing 6 to artificial bottom of a well opens set
Pipe closer door above mentions coiled tubing 6 by coiled tubing 6 just injection foam gas, marginal not nitrogen side, and formation fluid is through oil jacket annulus stream
Out, it returns and drains into waste liquid tank 11, realize lasting shaft bottom negative pressure, drain observation, when returning drain without containing sediment, bubble are returned in taking-up
Foam negative pressure, which returns row, to be terminated, complete well production.
Preferably, foam gas can be nitrogen, air or CO2, it is necessary to it is close under the conditions of well head to control foam solution (acid)
Degree is 0.5-0.85g/cm3, keep cementing truck discharge capacity 0.15m3/min-0.30m3/ min, nitrogen vehicle discharge capacity 20-22m processed3/ min, can
Drain situation is returned according to scene and freely adjusts pump truck and nitrogen vehicle discharge capacity, to keep liquid there are enough half-life period.
Preferably, in the step 3), can shake out situation according to the length and pit shaft of horizontal well, carry out following at least once
Ring sand washing processing, to keep pit shaft clean.
Preferably, it in the step 4), during coiled tubing drags acidizing treatment, carries out just squeezing acid operation simultaneously, and
The coiled tubing is carried out to the operation that lifts from the top and puts down at least once in perforated interval, distance is perforated interval 0.5m or so up and down.
Preferably, coiled tubing is 10-15m/min in straight well section and lower curved section lowering velocity and upward strain speed, in level
The scale removal of Duan Jinhang jet flow sand washing, acidification de-plugging and foam negative pressure return in row's operation process, and lowering velocity and upward strain speed are 2-4m/
min。
Claims (10)
1. a kind of horizontal well coiled tubing composite blockage relieving method, which is characterized in that this method uses coiled tubing (6), utilizes rotation
The impact force for turning spraycan is crushed pit shaft casting bed and borehole wall dirt, the tamper of nitrogen foam acid dissolution near wellbore zone and foam are negative
The methods of the row's of returning dredging oil flow channel is pressed to carry out composite blockage relieving, specifically includes the following steps:
1) coiled tubing (6) is installed: installation coiled tubing reel (7), coiled tubing injection head (8), coiled tubing preventer (9)
It is qualified to coiled tubing spraying-preventing system, testing pressure of well head as required with wellhead assembly (10), it is continuous in installation down-hole casing (13)
Near oil pipe (6) and rotating-spray tool string (12) to kickoff point (KOP)；
2) foam solution configuration and debugging: foam washing fluid and foam acid solution have been configured by recipe requirements, and in ground face handle flow container
(1), pump truck (2) is successively connected with one end of foam maker (5) import threeway, nitrogen vehicle (3) processed, note nitrogen vehicle (4) successively with bubble
The other end of foam generator (5) import threeway is connected, and foam maker (5) outlet is connected with coiled tubing (6), forms foam solution
Feed system, and debugged pump truck (2) and infused the discharge capacity of nitrogen vehicle (4)；
3) rotating-spray sand washing scale removal: decentralization coiled tubing (6) and rotating-spray tool string (12), until above 20m in sand face or so
Place opens pump truck (2), note nitrogen vehicle (4) and foam maker (5) direct circulation injection foam solution, the continuous oil of marginal not foam solution side decentralization
Pipe is crushed sill and borehole wall dirt by the rotating-spray tool string (12) of coiled tubing (6) bottom end, carries out sand washing, scale removal operation；
4) it foamed acid dragging acidification de-plugging: after pit shaft sand washing, scale removal to artificial bottom of a well, above mentions to horizontal well bottom perforated interval
Place replaces acid solution, closes wellhead assembly (10) sleeve gate after acid solution is replaced to perforated interval, is just squeezing acid to design flow, is above mentioning
Coiled tubing to remaining perforated interval, squeezes acid respectively, carries out acidification de-plugging operation；
5) foam gas negative pressure is returned to clear and be washed: after acid liquid reaction, being transferred coiled tubing (6) to artificial bottom of a well, is opened casing
Gate above mentions coiled tubing (6) by coiled tubing (6) just injection foam gas, marginal not nitrogen side, and formation fluid is through oil jacket annulus
Outflow, returns and drains into waste liquid tank (11), realizes lasting shaft bottom negative pressure, and drain observation is returned in taking-up, does not contain sediment when returning drain
When, foam negative pressure, which returns row, to be terminated, complete well production.
2. a kind of horizontal well coiled tubing composite blockage relieving method according to claim 1, which is characterized in that rotating-spray work
Tool string (12) includes sequentially connected interior coiled tubing connector (14), bivalve ball-and-seat (15), safe give up (16) and rotation spray
Penetrate syringe pipe (17).
3. a kind of horizontal well coiled tubing composite blockage relieving method according to claim 2, which is characterized in that rotating-spray punching
Hair washing (17) includes the main body (17-1) with hollow cavity and both ends open, is covered from the inside to the outside in the circumferential direction of the main body (17-1)
Equipped with bearing (17-3) and bearing holder (housing, cover) (17-2), the end of bearing holder (housing, cover) (17-2) is connected with syringe pipe (17-4), offers thereon
The nozzle (17-5) that several hollow cavities with main body (17-1) are connected to.
4. a kind of horizontal well coiled tubing composite blockage relieving method according to claim 3, which is characterized in that syringe pipe (17-
4) two groups of 6 nozzles (17-5) are offered on, axial angle of every group nozzle (17-5) angle respectively with main body (17-1) is
45 ° and 90 °.
5. a kind of horizontal well coiled tubing composite blockage relieving method according to claim 1, which is characterized in that foam washing fluid
Ingredient by mass percentage are as follows: 0.2% foam stabilizer, 0.5% foaming agent, remaining is clear water, and foam gas is nitrogen, air
Or CO2；
The ingredient of foam acid solution is by mass percentage are as follows: 1.2%YGJD descaling agent, 0.012%MH-16 corrosion inhibiter, and 0.3%
The acidproof foaming agent of SDS, remaining is clear water, and foam gas is nitrogen, air or CO2。
6. a kind of horizontal well coiled tubing composite blockage relieving method according to claim 5, which is characterized in that foam gas energy
Enough so that the density of foam washing fluid and foam acid solution under the conditions of well head is 0.5-0.85g/cm3, keep cementing truck discharge capacity
0.15m3/min-0.30m3/ min, nitrogen vehicle discharge capacity 20-22m processed3/ min, can be returned according to scene drain situation freely adjust pump truck and
Nitrogen vehicle discharge capacity, to keep liquid to have enough half-life period.
7. a kind of horizontal well coiled tubing composite blockage relieving method according to claim 1, which is characterized in that in step 3),
It is shaked out situation according to the length of horizontal well and pit shaft, circulation sand washing processing at least once is carried out, to keep pit shaft clean.
8. a kind of horizontal well coiled tubing composite blockage relieving method according to claim 1, which is characterized in that in step 4),
Coiled tubing drag acidizing treatment during, carry out just squeeze acid operation simultaneously, and by coiled tubing (6) carried out in perforated interval to
Lack the primary operation that lifts from the top and puts down, distance is perforated interval 0.5m or so up and down.
9. a kind of horizontal well coiled tubing composite blockage relieving method according to claim 1, which is characterized in that in step 4),
Oil pipe squeezes after the completion of acid, carries out the closing well reaction of 20-30min.
10. a kind of horizontal well coiled tubing composite blockage relieving method according to claim 1, which is characterized in that coiled tubing
(6) it is 10-15m/min in straight well section and lower curved section lowering velocity and upward strain speed, carries out jet flow sand washing scale removal, acid in horizontal segment
Neutralizing is stifled and foam negative pressure returns in row's operation process, and lowering velocity and upward strain speed are 2-4m/min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810849946.3A CN109083621A (en) | 2018-07-28 | 2018-07-28 | A kind of horizontal well coiled tubing composite blockage relieving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810849946.3A CN109083621A (en) | 2018-07-28 | 2018-07-28 | A kind of horizontal well coiled tubing composite blockage relieving method |
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| CN109083621A true CN109083621A (en) | 2018-12-25 |
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| CN201810849946.3A Pending CN109083621A (en) | 2018-07-28 | 2018-07-28 | A kind of horizontal well coiled tubing composite blockage relieving method |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671085A (en) * | 2019-11-19 | 2020-01-10 | 成都北方石油勘探开发技术有限公司 | Horizontal well acidizing process based on composite acid system |
| CN110700777A (en) * | 2019-10-22 | 2020-01-17 | 东营汇聚丰石油科技有限公司 | System and method for flushing coal ash in coal-bed gas well by using nitrogen foam flushing fluid |
| CN110965962A (en) * | 2019-11-29 | 2020-04-07 | 中国石油集团川庆钻探工程有限公司 | Method for recovering production and deblocking of sealed gas well |
| CN111021970A (en) * | 2019-12-27 | 2020-04-17 | 东营汇聚丰石油科技有限公司 | Operation device and method for cleaning near-well polluted zone of coal-bed gas well |
| CN111502598A (en) * | 2019-01-31 | 2020-08-07 | 中国石油天然气股份有限公司 | Acidification blockage removing method |
| CN111502599A (en) * | 2019-01-31 | 2020-08-07 | 中国石油天然气股份有限公司 | Acidification blockage removing method |
| CN111500271A (en) * | 2020-03-19 | 2020-08-07 | 克拉玛依新科澳石油天然气技术股份有限公司 | Horizontal well sand washing foam liquid and preparation method thereof |
| CN112227986A (en) * | 2020-10-20 | 2021-01-15 | 克拉玛依新科澳石油天然气技术股份有限公司 | High-leakage well drilling plug sand washing liquid, and use method and application thereof |
| CN112627774A (en) * | 2019-10-08 | 2021-04-09 | 中国石油天然气股份有限公司 | Foam acid ground injection system and use method thereof |
| CN112832702A (en) * | 2021-02-04 | 2021-05-25 | 西南石油大学 | Foam drainage gas production-sand washing integrated device and process thereof |
| CN112983325A (en) * | 2019-12-16 | 2021-06-18 | 中国石油天然气股份有限公司 | Horizontal well blockage removal and yield increase integrated process and system |
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| CN114562231B (en) * | 2020-11-27 | 2024-05-28 | 中国石油天然气股份有限公司 | Wellbore descaling method, system, device and computer storage medium |
| CN112832702A (en) * | 2021-02-04 | 2021-05-25 | 西南石油大学 | Foam drainage gas production-sand washing integrated device and process thereof |
| CN112832702B (en) * | 2021-02-04 | 2022-04-08 | 西南石油大学 | Foam drainage gas production-sand washing integrated device and process thereof |
| CN114961599A (en) * | 2021-02-24 | 2022-08-30 | 中国石油天然气集团有限公司 | Descaling device for hydraulic jet casing |
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