CN104695927B - A kind of coiled tubing and production tube compound tube string pressure break and completion integral method - Google Patents
A kind of coiled tubing and production tube compound tube string pressure break and completion integral method Download PDFInfo
- Publication number
- CN104695927B CN104695927B CN201510038874.0A CN201510038874A CN104695927B CN 104695927 B CN104695927 B CN 104695927B CN 201510038874 A CN201510038874 A CN 201510038874A CN 104695927 B CN104695927 B CN 104695927B
- Authority
- CN
- China
- Prior art keywords
- string
- pressure break
- compound tube
- coiled tubing
- fracturing
- Prior art date
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- 150000001875 compounds Chemical class 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 238000010276 construction Methods 0.000 claims abstract description 17
- 239000012530 fluid Substances 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 10
- 239000010959 steel Substances 0.000 claims abstract description 10
- 238000005296 abrasive Methods 0.000 claims abstract description 6
- 238000003825 pressing Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000000994 depressed Effects 0.000 claims description 3
- 238000005755 formation reaction Methods 0.000 claims description 3
- ZRALSGWEFCBTJO-UHFFFAOYSA-N guanidine Chemical compound 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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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
-
- 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
- E21B43/11—Perforators; Permeators
- E21B43/114—Perforators using direct fluid action on the wall to be perforated, e.g. abrasive jets
Abstract
The invention belongs to oil-gas field fracturing technical field, and in particular to a kind of coiled tubing includes with production tube compound tube string pressure break and completion integral method, specific steps：1）Under enter compound tube string；2）First interval sets；3）First interval abrasive perforating；4）First interval pressure break；5）Note fracturing fluid；6）After pressure break finishes first paragraph, fracturing string is above carried to second segment and design perforating site, repeat 2）‑5）, complete the pressing crack construction of follow-up all construction intervals；7）After construction is finished, fracturing string is transferred to artificial bottom of a well position, steel ball is thrown from well head, make hydraulic releasing realize giving up；8）Discharge opeing and operation.After pressure break of the present invention is finished, next time flow string can be lacked, reservoir damage is reduced while shortening duty cycle.
Description
Technical field
The invention belongs to oil-gas field fracturing technical field, and in particular to a kind of coiled tubing and production tube compound tube string pressure
Split and completion integral method.
Background technology
Hydraulic sand blasting fracturing technique beam hole, fracturing integrated, the agent technology as exploitation low permeability oil and gas field, with reference to
Coiled tubing can dragging with pressure the characteristics of, the number of plies is unrestricted with transformation, pit shaft keeps the conventional skill such as big orifice after pressure break
The incomparable advantage of art.
Wherein coiled tubing perforation, annular fracturing, the method for anchoring type mechanical packer packing have that packing is reliable, pressure break
The features such as discharge capacity is big, efficiency of construction is high, using relatively broad.But the technique pressure break has finished out fracturing string, on the one hand deposits
In larger construction risk, on the other hand, for low-voltage and low-yield gas well, it has hydro carbons condensed liquid or ground in process of production
Layer water flows into shaft bottom, and due to Large Diameter Pipeline oil pipe, its fluid-carrying capability is poor（Produced gas can not be reached and continuously take liquid because flow velocity is too small
Requirement）, cause hydrops in pit shaft to be on the increase, shaft bottom back pressure constantly increases, sometimes even gas well can completely be killed so that
Closing well, the interval of severe contamination pressure break, causes the injury to reservoir, directly influences gas well yield and coefficient of mining.
The content of the invention
It is an object of the invention to provide a kind of coiled tubing and production tube compound tube string pressure break and completion integral method,
To simplify working procedure, injury of the kill-job to reservoir is reduced.
The technical scheme is that：
A kind of coiled tubing and production tube compound tube string pressure break and completion integral method, comprise the following steps：
Step 1）Under enter compound tube string：Connector, production tube, hydraulic pressure are connected with turn by coiled tubing lower end to lose
Hand, mechanical casing collar locator, injector, packer, guiding check valve are combined into compound tube string, in lower going-into-well cylinder；
Step 2）First interval sets：Positioned by casing collar locator (CCL), by injector alignment first paragraph design perforation
Then position, set packer carries the m of discharge capacity 1.03/ min, closes annular space gate, when pressure reaches more than 20MPa, termination of pumping 3
~ 5min, observes casing pressure stable case, if pressure does not drop, illustrates that packer is effective；
Step 3）First interval abrasive perforating：After testing seal about packer is qualified, sleeve gate is opened, from the injection of compound tube string
0.2m3/ min perforating fluids, when perforating fluid to injector nozzle is apart from 200m, improve discharge capacity to 1.0 m3/ min, abrasive perforating,
Perforating fluid is returned out from oil jacket annular space；
Step 4）First interval pressure break：After perforation is finished, sleeve gate, the m of control ring idle discharge amount 1.0 are closed3/ min, together
When compound tube string injection discharge capacity be maintained at 0.1 m3/ min carries out burst test, and subsequent construction is continued if the layer ruptures, if broken
Split it is unsuccessful, then continue perforation or acid filling liquid, until the layer rupture；
Step 5）After first interval formation fracture, fracturing fluid is injected from oil jacket annular space, while keeping the m of compound tube string 0.13/
Min injects base fluid；
Step 6）After pressure break finishes first paragraph, fracturing string is above carried to second segment and design perforating site, repeat step 2）-
5）, complete the pressing crack construction of follow-up all construction intervals；
Step 7）After construction is finished, fracturing string is transferred to artificial bottom of a well position, steel ball is thrown from well head, treat that steel ball is dropped down onto
After hydraulic releasing, compound tube serially add be depressed into hydraulic releasing realize give up, the tool string below hydraulic releasing falls in artificial bottom of a well, so
Steel ball is flushed out pit shaft by oil jacket annular space huge discharge reacting cycle afterwards；
8）Compound tube string is above carried, coiled tubing and connector is unloaded, production tube wellhead assembly is hung on into, for oil gas
The discharge opeing of well and operation.
The packer is Y241 packers.
Step 5）The base fluid is guanidine matrix liquid.
The wellhead assembly is made up of boll-weevil hanger, production tree connection.
This coiled tubing that the present invention is provided and production tube compound tube string pressure break and completion integral method, Neng Goushi
Existing following effect：
Firstth, after pressure break is finished, underground tool string is given up and stays in artificial bottom of a well, and act coiled tubing and connector,
Production tube is suspended on into wellhead assembly directly to be produced, next time flow string can be lacked, shorten duty cycle；
Secondth, after pressure break is finished, it is not necessary to flow string under kill-job, reservoir damage can be reduced.
Brief description of the drawings
Fig. 1 is compound tube string structure schematic diagram.
In figure：1st, coiled tubing；2nd, connector；3rd, production tube；4th, hydraulic releasing；5th, mechanical casing box cupling positioning
Device；6th, injector；7th, packer；8th, guiding check valve；9th, wellhead assembly.
Specific embodiment
Embodiment 1：
It is an object of the invention to provide a kind of coiled tubing and production tube compound tube string pressure break and completion integral side
Method, to simplify working procedure, reduces injury of the kill-job to reservoir.
Present embodiments provide a kind of coiled tubing as shown in Figure 1 with production tube compound tube string pressure break with completion integrally
Change method, comprises the following steps：
Step 1）Under enter compound tube string：Connector 2, production tube 3, hydraulic pressure are connected with turn by the lower end of coiled tubing 1
Give up 4, mechanical casing collar locator 5, injector 6, Y241 packers, guiding check valve 8 is combined into compound tube string, under enter
In pit shaft；
Step 2）First interval sets：Positioned by casing collar locator (CCL), injector 6 is directed at first paragraph design perforation
Position, sets Y241 packers, then carries the m of discharge capacity 1.03/ min, closes annular space gate, when pressure reaches more than 20MPa,
Termination of pumping 3min, observes casing pressure stable case, if pressure does not drop, illustrates that Y241 packers are effective；
Step 3）First interval abrasive perforating：After packer 7 tests sealing lattice, sleeve gate is opened, from the injection of compound tube string
0.2m3/ min perforating fluids, when perforating fluid is to 6 nozzle distance 200m of injector, improve discharge capacity to 1.0 m3/ min, abrasive perforating,
Perforating fluid is returned out from oil jacket annular space；
Step 4）First interval pressure break：After perforation is finished, sleeve gate, the m of control ring idle discharge amount 1.0 are closed3/ min, together
When compound tube string injection discharge capacity be maintained at 0.1 m3/ min carries out burst test, and subsequent construction is continued if the layer ruptures, if broken
Split it is unsuccessful, then continue perforation or acid filling liquid, until the layer rupture；
Step 5）After first interval formation fracture, fracturing fluid is injected from oil jacket annular space, while keeping the m of compound tube string 0.13/
Min injects guanidine matrix liquid；
Step 6）After pressure break finishes first paragraph, fracturing string is above carried to second segment and design perforating site, repeat step 2）-
5）, complete the pressing crack construction of follow-up all construction intervals；
Step 7）After construction is finished, fracturing string is transferred to artificial bottom of a well position, steel ball is thrown from well head, treat that steel ball is dropped down onto
After hydraulic releasing 4, compound tube serially add be depressed into hydraulic releasing 4 realize give up, the tool string below hydraulic releasing 4 falls in artificial well
Bottom, then oil jacket annular space huge discharge reacting cycle steel ball is flushed out into pit shaft；
8）Compound tube string is above carried, coiled tubing 1 and connector 2 is unloaded, production tube 3 is hung on into wellhead assembly 9, be used for
The discharge opeing of Oil/gas Well and operation.
Wellhead assembly 9 is made up of boll-weevil hanger, production tree connection, belongs to known technology.
In sum, it is of the invention compared with existing process method, with advantages below：
Firstth, after pressure break is finished, underground tool string is given up and stays in artificial bottom of a well, and act coiled tubing, by production oil
Pipe is suspended on wellhead assembly and is directly produced, and can lack next time flow string, shortens duty cycle；
Secondth, after pressure break is finished, it is not necessary to flow string under kill-job, reservoir damage can be reduced.
The method of testing that the present invention is not described in detail is conventional method of testing or existing method in the art, herein not
Describe one by one.
It is exemplified as above be only to of the invention for example, do not constitute the limitation to protection scope of the present invention, it is all
It is that design same or analogous with the present invention is belonged within protection scope of the present invention.
Claims (1)
1. a kind of coiled tubing and production tube compound tube string pressure break and completion integral method, it is characterised in that including with
Lower step：
Step 1）Under enter compound tube string：By coiled tubing（1）Lower end is connected with connector in turn（2）, production tube（3）, liquid
Pressure is given up（4）, mechanical casing collar locator（5）, injector（6）, packer（7）, guiding check valve（8）It is combined into combination
Pipe string, in lower going-into-well cylinder；
Step 2）First interval sets：Positioned by casing collar locator (CCL), by injector（6）Alignment first paragraph design perforation position
Put, set packer（7）, then carry the m of discharge capacity 1.03/ min, closes annular space gate, when pressure reaches more than 20MPa, termination of pumping
3min, observes casing pressure stable case, if pressure does not drop, illustrates packer（7）Effectively；
Step 3）First interval abrasive perforating：Packer（7）After testing sealing lattice, sleeve gate is opened, from the injection of compound tube string
0.2m3/ min perforating fluids, when perforating fluid to injector（6）During nozzle distance 200m, discharge capacity to 1.0 m is improved3/ min, sandblasting is penetrated
Hole, perforating fluid is returned out from oil jacket annular space；
Step 4）First interval pressure break：After perforation is finished, sleeve gate, the m of control ring idle discharge amount 1.0 are closed3/ min, while combination
Pipe string injection discharge capacity is maintained at 0.1 m3/ min carries out burst test, if the layer rupture if continue subsequent construction, if rupture not into
Work(, then continue perforation or acid filling liquid, until layer rupture；
Step 5）After first interval formation fracture, fracturing fluid is injected from oil jacket annular space, while keeping the m of compound tube string 0.13/ min is noted
Enter base fluid；
Step 6）After pressure break finishes first paragraph, fracturing string is above carried to second segment and design perforating site, repeat step 2）-5）,
Complete the pressing crack construction of follow-up all construction intervals；
Step 7）After construction is finished, fracturing string is transferred to artificial bottom of a well position, steel ball is thrown from well head, treat that steel ball drops down onto hydraulic pressure
Give up（4）Afterwards, compound tube is serially added and is depressed into hydraulic releasing（4）Realization is given up, hydraulic releasing（4）Following tool string falls in artificial well
Bottom, then oil jacket annular space huge discharge reacting cycle steel ball is flushed out into pit shaft；
8）Compound tube string is above carried, coiled tubing is unloaded（1）And connector（2）, by production tube（3）Hang on wellhead assembly（9）,
For the discharge opeing and operation of Oil/gas Well；
The packer（7）It is Y241 packers, step 5）The base fluid is guanidine matrix liquid, the wellhead assembly（9）By oil pipe
Hanger, production tree connection composition.
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| CN201510038874.0A CN104695927B (en) | 2015-01-27 | 2015-01-27 | A kind of coiled tubing and production tube compound tube string pressure break and completion integral method |
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| CN201510038874.0A CN104695927B (en) | 2015-01-27 | 2015-01-27 | A kind of coiled tubing and production tube compound tube string pressure break and completion integral method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107654207B (en) * | 2017-11-16 | 2020-06-26 | 中国石油集团川庆钻探工程有限公司 | Section method for fixed-point preset sand plug of coiled tubing horizontal well |
| CN107939376A (en) * | 2017-11-27 | 2018-04-20 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of gas well gas testing operation integrated synthesis completion method |
| CN108952664A (en) * | 2018-08-22 | 2018-12-07 | 中国石油集团渤海钻探工程有限公司 | A kind of oil/gas well straight well orientation water-jet multistage fracturing method |
| CN111206878A (en) * | 2018-11-21 | 2020-05-29 | 中国石油天然气股份有限公司 | Well completion method |
| CN109630083A (en) * | 2018-11-22 | 2019-04-16 | 西南石油大学 | A kind of abrasive perforating annular fracturing ground control system and method |
| CN109339855B (en) * | 2018-11-27 | 2020-11-24 | 中煤科工集团西安研究院有限公司 | Perforating and staged fracturing method for continuous pipe in long-drill-hole casing for gas extraction in coal mine |
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