CN106089173B - A kind of completion mode with protection reservoir packing function - Google Patents
A kind of completion mode with protection reservoir packing function Download PDFInfo
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- CN106089173B CN106089173B CN201610456915.2A CN201610456915A CN106089173B CN 106089173 B CN106089173 B CN 106089173B CN 201610456915 A CN201610456915 A CN 201610456915A CN 106089173 B CN106089173 B CN 106089173B
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- 238000012856 packing Methods 0.000 title claims description 16
- 239000007788 liquid Substances 0.000 claims abstract description 81
- 238000005553 drilling Methods 0.000 claims abstract description 42
- 239000004568 cement Substances 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000013461 design Methods 0.000 claims description 38
- 239000011148 porous material Substances 0.000 claims description 20
- 239000012530 fluid Substances 0.000 claims description 18
- 230000007246 mechanism Effects 0.000 claims description 18
- 238000007789 sealing Methods 0.000 claims description 16
- 238000003825 pressing Methods 0.000 claims description 15
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 7
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- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
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Classifications
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- 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
- 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 OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- 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
- 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
- E21B43/116—Gun or shaped-charge perforators
-
- 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
- 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
- E21B43/255—Methods for stimulating production including the injection of a gaseous medium as treatment fluid into the formation
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to a kind of completion modes that there is protection reservoir to insulate function, mainly include the following steps that：1. drilling well：Drill layer reservoir to finishing drilling well depth or drill reservoir without be drilled into finishing drilling well depth or bore open reservoir without drilling reservoir；2. well logging；3. open-hole shooting；4. building gear：It is kept off in the built-in meter liquid that erects of wellbore；5. high enegry gas fracturing：High enegry gas fracturing at least once is implemented at least one layer of reservoir, forms man-made fracture；6. if step 1 drilling well selection drills reservoir opens reservoir without drilling reservoir, after follow-up hole to finishing drilling well depth without being drilled into finishing drilling well depth or boring；7. well cementation：Cement sheath is formed in annular space between reservoir casing and wellbore；8. well-case perforating：Establish the duct between reservoir and pit shaft；9. going into operation or betting.The completion mode short construction period of the present invention, process is few, and expense is low；The absorbability and percolation ability of reservoir can be greatly improved in completion mode through the invention, have very high economic benefit.
Description
Technical field
The invention belongs to oil, natural gas, coal bed gas, underground heat and can ground leaching etc. mineral resources explorations development field, specifically
It is related to a kind of completion mode with protection reservoir packing function.
Background technology
Oil, natural gas, coal bed gas, underground heat and can ground leaching etc. in mineral resources explorations development process, well-case perforating is complete
Well is domestic and international the most extensive and completion mode the most main.So-called well-case perforating completion is exactly to drill reservoir to drilled well
Deep, tripping in reservoir casing to reservoir bottom injects cement slurry cementing, and cement mortar is frozen into cement sheath outside reservoir casing（Annulated column
Shape Behavior of Hardened Cement Paste）Play the role of sealing reservoir casing and packing reservoir, reservoir casing, cement sheath are then shot through by perforation and worn
Saturating reservoir certain depth, it is established that seepage channel.
In order to improve yield and injectability, generally implement after perforation hydraulic fracturing, high enegry gas fracturing, squeeze active water,
The reservoir reconstructions measure such as acidification or acid fracturing.Reservoir reconstruction measure mainly be pressed into its high pressure aperture, height,
The effects that active dissolution and acid solution corrosion, generates man-made fracture in the near wellbore zone of reservoir, increases absorption area and seepage area,
Dissolve the external immersion substance of corrosion, corrosion cement, charges, crack slotted wall and hole hole wall, connection and expansion pre-existent pore
And primary fracture, it releases and blocks, improve the absorbability and percolation ability of reservoir, this process is referred to as reservoir reconstruction measure.
But above-mentioned reservoir reconstruction measure can bring two problems：First is to press to wear and corrosion cement sheath；Second be
The man-made fracture that near wellbore zone generates can exceed reservoir, to reservoir above and below other intervals extend.This can cause reservoir with its above and below
The interlayer of interval is ganged up, and reservoir packing miopragia or failure are made.And reservoir packing function once weakens or failure, thereupon
Be highlighting for interlayer interference and interlayer contradiction, influence and restrict reservoir yield and flood effectiveness.Than more typical：First, bottom water
The bottom water of oil reservoir gangs up channel coning along interlayer, and moisture content is made to increase, and oil production declines, or even is only discharged not fuel-displaced.Second is that note
Well is when interlayer gangs up well section, oil reservoir upper and lower part is higher than there are water imbibition and permeability or is equivalent to the interval of oil reservoir, injection
Water then gangs up channel part along interlayer or fully enters water imbibition and permeability is higher than or is equivalent to the interval of oil reservoir, is formed inefficient
Or inefficient water injection.Using technologies such as water blockoff, profile controls, bottom water cone well, inefficient water caused by being ganged up by interlayer are administered,
Especially low-permeability oil deposit, limited resource is more, and the effect of acquirement is limited.
One of common reservoir reconstruction measure high enegry gas fracturing is to utilize propellant --- it is high that powder burning generates high temperature
Body of calming the anger expands seepage area and absorption area, links up primary fracture and original hole in reservoir near wellbore zone formation chicken-wire cracking
Road improves reservoir yield and absorbability.Its surge pressure formed and pressure time be cracking initiation and extension it is important because
Element, and surge pressure and pressure time are associated with combustion rate of powder.The rule that combustion rate of powder follows is：u=u1pr.U is in formula
Combustion rate of powder, u1For powder burning coefficient, p is environmental pressure, and r is pressure coefficient.That is the height of environmental pressure determines gunpowder combustion
The height of speed.In high enegry gas fracturing construction, environmental pressure is generally by the above fluid column of high energy gas fracture bomb body --- and liquid is kept off
It establishes and controls, i.e., environmental pressure height depends on liquid gear height.The well of well-case perforating completion typically uses pumping, gas
The modes such as act and oil well pump pump drainage reduce liquid gear, and inject liquid, raising liquid gear, to control liquid gear to pit shaft.Pumping,
There are many disadvantages for the modes such as gaslift and oil well pump pump drainage, when it is mating with formation testing, well workover and oil recovery, not in the model of drilling engineering
It encloses；Second is that the construction completed by special equipment and special process；Third, long construction period, process is more, costly.
In the pit shaft of well-case perforating completion, the high enegry gas fracturing of implementation has the following disadvantages：When by perforation diameter,
The limitation of hole count and Kong Mi, the area of passage that perforation is formed is smaller, and the high pressure gas into reservoir near wellbore zone is less, in order to carry
High high enegry gas fracturing effect, gunpowder dosage, combustion rate of powder and liquid gear are often close to limiting value；Second is that opposite perforation was formed
Area of passage, perforation thickness is larger, causes the overcurrent thickness that high pressure gas enters reservoir near wellbore zone also big；Third, due to reservoir
Casing profile is smaller, and the section that high pressure gas diffuses up is also smaller.In this way, pressing to wear cement sheath and man-made fracture to reservoir extension
The probability and degree stretched are larger.
Pressure and water absorption test the result shows that：When high enegry gas fracturing, the high temperature and high pressure gas column that powder burning generates,
Lower part wellbore pressure is slightly above top；But the probability and degree for pressing to wear cement sheath, interlayer being caused to be ganged up, it is that lower part is apparent
Higher than top.From mechanism and operating mode angle analysis, one of the reason of generating such result and phenomenon：Lower part pit shaft is closed
, and full of can be considered incoercible liquid, pressure release is slow, and the pressure time is long；Top pit shaft is open, Er Qiegao
Body of calming the anger is diffused up by lifting liquid gear, and pressure release is fast, and the pressure time is short.
High enegry gas fracturing is mostly implemented in the pit shaft of well-case perforating completion, and technology and equipment are directed to and adapt to set
Pipe perforation completion pit shaft.If being directly applied to bore hole reservoir, due to reducing the barrier of casing, cement sheath, lose
Limitation of the perforated interval to overcurrent thickness, first, probability that man-made fracture to reservoir outside extend larger to man-made fracture control difficulty
Increase with degree；Second is that high energy gas fracture bomb remains are possible to be retained in wellbore, the unfavorable of cleaning wellbore is brought.
Invention content
The object of the present invention is to provide a kind of completion modes that there is protection reservoir to insulate function, can reduce or avoid because of water
It forces and splits, high enegry gas fracturing, squeezes reservoir packing function caused by the reservoir reconstructions measures such as active water, acidification and acid fracturing
The problem of weakening or losing.
The technical scheme is that：
A kind of completion mode with protection reservoir packing function, specifically includes following steps：
Step 1：Drilling well：Drill layer reservoir to finishing drilling well depth or drill reservoir without be drilled into finishing drilling well depth or bore open reservoir
Without drilling reservoir；
Step 2：Well logging：Comprehensive logging；
Step 3：Open-hole shooting：The duct of predetermined depth is established in reservoir near wellbore zone；
Step 4：Build gear：It is kept off in the built-in meter liquid that erects of wellbore, high enegry gas fracturing ginseng is calculated and determined according to design liquid shelves
Number；
Step 5：High enegry gas fracturing：High enegry gas fracturing at least once is implemented at least one layer of reservoir, in the nearly well of reservoir
Area forms man-made fracture；
Step 6：If step 1 drilling well selection drills reservoir and opens reservoir without drilling storage without being drilled into finishing drilling well depth or boring
Layer, then after follow-up hole to finishing drilling well depth；
Step 7：Well cementation：Cement sheath is formed in annular space between reservoir casing and wellbore；
Step 8：Well-case perforating：It is shot through reservoir casing and cement sheath and penetrates reservoir to predetermined depth, establish reservoir and well
Duct between cylinder；
Step 9：It goes into operation or bets；
Step 10：If pilot production or injection test are not up to pre-provisioning request, implement reservoir reconstruction measure；
Step 11：After reservoir reconstruction, secondary operation or secondary stake are carried out.
Filing in the step 3 specifically includes：
When original liquid-column height in wellbore is more than design liquid shelves, design liquid shelves are established by tubing string fluid-discharge therapy；
When original liquid-column height in wellbore is less than design liquid shelves, into wellbore, injection design quantity of fluid, establishes design
Liquid shelves；
When well depth is less than design liquid gear, the dose of high enegry gas fracturing, burn rate, pressure release area parameter are adjusted.
When original liquid-column height when in wellbore is more than design liquid shelves, erected by tubing string fluid-discharge therapy wellbore is built-in
Liquid shelves are counted, the specific method is as follows：
Join bucket axle-linked cable-car from wellbore tripping in, when connection bucket axle-linked cable-car enters liquid level in wellbore, the liquid in wellbore enters
Annular space, original fluid column in annular space rise until excessive from well head；Continue tripping in join bucket axle-linked cable-car to shaft bottom or design well section,
The switching mechanism being arranged on connection bucket is opened, the liquid in annular space flows into connection bucket axle-linked cable-car, and the fluid column in annular space reduces, connection
Fluid column in bucket axle-linked cable-car rises, and liquid shelves are formed after the fluid column in annular space is balanced with the fluid column in connection bucket axle-linked cable-car：
If the liquid gear height formed injects the liquid of design flow into connection bucket axle-linked cable-car, makes connection less than design liquid shelves
Reach design liquid gear height in bucket axle-linked cable-car and in annular space；
If the liquid gear height formed in axle-linked cable-car and in annular space is higher than design liquid shelves, adjustment and high enegry gas fracturing
Dose, burn rate and pressure release area parameter.
The connection bucket axle-linked cable-car includes the connection bucket and tubing string being integrally connected；The optional sliding connection bucket of the connection bucket,
Shock connection bucket, carrying a gun joins bucket or joins bucket with bullet, wherein：
Sliding connection bucket even include determine bucket be set to the cunning bucket determined in bucket, slide bar, jack rod sleeve, sealing element, position-limit mechanism and
Guiding mechanism；The cunning bucket and determines bucket and be equipped with multigroup intercommunicating pore；The cunning bucket bucket bottom, to determine bucket bucket bottom closed, in sliding bucket
Bucket bottom connects slide bar, determines bucket bucket bottom and is equipped with jack rod sleeve, and slide bar is fed through jack rod sleeve and stretches out, and is provided with and draws between sliding bucket and determining bucket
Mechanism is led, in sliding bucket and determines to be both provided with sealing element between bucket, slide bar and jack rod sleeve；The cunning bucket is under the guiding of guiding mechanism
It can determine linear slide in bucket, when the intercommunicating pore on sliding bucket is overlapped with the intercommunicating pore determined on bucket because of sliding bucket sliding, sliding connection bucket
It opens；Otherwise, sliding connection bucket is closed；
It includes determine bucket to determine holding in bucket and hit seat and impact hammer with being set to hit connection bucket；It is equipped with multigroup connection determining barrel side wall
It is closed to determine bottom of the barrel for hole；Described to hold that hit seat include blind circle, upper pressing cap, lower pressing cap, sealing element and baffle, the blind circle is set
It is concave-convex made of the pressure-resistant friable material such as glass, ceramics to set and constitute whole, described baffle with upper pressing cap at the top of upper pressing cap
The one or both sides of lenticular body or meniscus body, baffle are equipped with low force grid groove, and the baffle convex surface downwardly pushes
Cap；The sealing element is fastened by upper and lower pressure cap, and sealing element, which will be held, to be hit seat and be divided into upper and lower two chambers insulated mutually,
The circulation of upper and lower two-way blocking-up liquid is hit connection bucket and is closed；Baffle is smashed with the impact hammer, holds and hits seat connection, hit connection
Bucket is opened；
In the cunning bucket bucket bottom connection perforating gun or high energy gas fracture bomb of the sliding connection bucket, the connection bucket that carries a gun is formed
Or join bucket with bullet.
The multigroup intercommunicating pore being arranged on the bucket is arranged in a matrix；In multigroup intercommunicating pore, the aperture at middle part is big, to
Above, downward aperture is small；The pitch-row at middle part is small, and upward, down bore is away from big；Middle part hole count is more, and upward, downward hole count is few.
Beneficial effects of the present invention：
1. the completion mode of the present invention opens reservoir to before cementing the well in brill, when reservoir is naked state, by implementing to reservoir
High enegry gas fracturing：First is to avoid implementing reservoir reconstruction measure, or reduce the intensity of reservoir reconstruction measure after well cementation；
Avoid press to wear with corrosion cement sheath, or reduce the degree pressed to wear with corrosion cement sheath.By protecting cement sheath, protect
The packing that cement sheath has the function of reservoir；Second is being longitudinally extended for the man-made fracture that control high enegry gas fracturing generates, and is prevented
Only man-made fracture causes interlayer to gang up, and protects the packing function of reservoir；
2. the completion mode short construction period of the present invention, process is few, and expense is low；Completion mode can be substantially through the invention
The absorbability and percolation ability of the raising reservoir of degree, have very high economic benefit.
Description of the drawings
Fig. 1 be the present invention in the case that drill layer reservoir to drilled well depth using band bullet join bucket carry out building gear, high energy gas
The schematic diagram of pressure break and well cementation process；
Fig. 2 is the present invention to be opened reservoir and makes without drilling reservoir in the case that drilling reservoir without being drilled into finishing drilling well depth or boring
With the schematic diagram for bullet connection bucket build gear, high enegry gas fracturing and process of cementing the well；
In figure, 1- wellbores, 2- reservoirs, the shaft bottoms 3-, 4- sliding connection buckets, the blind circles of 5-, 6- well liquids, 7- axle-linked cable-cars, 8- high energy
Gas fracture bomb, 9- igniters, 10- locators, 11- cables, 12- cement sheaths, 13-, which is held, hits seat, 14- impact hammers.
Specific implementation mode
The present invention is further detailed below in conjunction with the accompanying drawings：
Embodiment 1：
A kind of completion mode with protection reservoir packing function, before brill opens reservoir 2 to well cementation, reservoir 2 is naked state
When, high enegry gas fracturing at least once is implemented at least one layer of reservoir 2, in 2 near wellbore zone of reservoir formation man-made fracture, including with
Lower step：
Step 1：Drilling well：Layer reservoir 2 is drilled to finishing drilling well depth；
Step 2：Perforation：The duct of predetermined depth is established in 2 near wellbore zone of reservoir；
Step 3：Build gear：It is kept off in the built-in meter liquid that erects of wellbore 1, high enegry gas fracturing is calculated and determined according to liquid shelves are related to
Parameter；
Step 4：High enegry gas fracturing：High enegry gas fracturing at least once is implemented at least one layer of reservoir 2, it is close in reservoir 2
Well area forms man-made fracture；
Step 5：Well cementation：Cement sheath 12 is formed in annular space between 2 casing of reservoir and wellbore 1；
Step 6：Perforation：Be shot through 2 casing of reservoir and cement sheath 12 and penetrate reservoir 2 arrive predetermined depth, establish reservoir 2 with
Duct between pit shaft；
Step 7：It goes into operation or bets；
Step 8：If pilot production or injection test are not up to pre-provisioning request, implement 2 modification measures of reservoir；
Step 9：After reservoir 2 is transformed, secondary operation or secondary stake are carried out.
Embodiment 2：
A kind of completion mode with protection reservoir packing function, drilling reservoir 2 without being drilled into finishing drilling well depth, reservoir 2 is
When naked state, high enegry gas fracturing at least once is implemented at least one layer of reservoir 2, is formed in 2 near wellbore zone of reservoir and is manually split
Seam, includes the following steps：
Step 1：Drilling well：Reservoir 2 is drilled without being drilled into finishing drilling well depth；
Step 2：Perforation：The duct of certain depth is established in 2 near wellbore zone of reservoir；
Step 3：Build gear：It is kept off in the built-in meter liquid that erects of wellbore 1, high enegry gas fracturing is calculated and determined according to liquid shelves are related to
Parameter；
Step 4：High enegry gas fracturing：High enegry gas fracturing at least once is implemented at least one layer of reservoir 2, it is close in reservoir 2
Well area forms man-made fracture；
Step 5：After follow-up hole to finishing drilling well depth；
Step 6：Well cementation：Cement sheath 12 is formed in annular space between 2 casing of reservoir and wellbore 1；
Step 7：Perforation：Be shot through 2 casing of reservoir and cement sheath 12 and penetrate reservoir 2 arrive predetermined depth, establish reservoir 2 with
Seepage flow duct between pit shaft；
Step 8：It goes into operation or bets；
Step 9：If pilot production or injection test are not up to pre-provisioning request, implement 2 modification measures of reservoir；
Step 10：After reservoir 2 is transformed, secondary operation or secondary stake are carried out.
Embodiment 3：
A kind of completion mode with protection reservoir packing function, brill open reservoir 2 and open portion without drilling reservoir 2, the brill of reservoir 2
When being divided into naked state, the reservoir 2 opened brill and do not drilled implements high enegry gas fracturing at least once, in 2 near wellbore zone of reservoir
Man-made fracture is formed, is included the following steps：
Step 1：Drilling well：Brill opens reservoir 2 without drilling reservoir 2；
Step 2：Perforation：The duct of predetermined depth is established in 2 near wellbore zone of reservoir；
Step 3：Build gear：It is kept off in the built-in meter liquid that erects of wellbore 1, high enegry gas fracturing is calculated and determined according to liquid shelves are related to
Parameter；
Step 4：High enegry gas fracturing：The reservoir 2 opened brill and do not drilled implements high enegry gas fracturing at least once,
2 near wellbore zone of reservoir forms man-made fracture；
Step 5：After follow-up hole to finishing drilling well depth；
Step 6：Well cementation：Cement sheath 12 is formed in annular space between 2 casing of reservoir and wellbore 1；
Step 7：Perforation：Be shot through 2 casing of reservoir and cement sheath 12 and penetrate reservoir 2 arrive predetermined depth, establish reservoir 2 with
Seepage flow duct between pit shaft；
Step 8：It goes into operation or bets；
Step 9：If pilot production or injection test are not up to pre-provisioning request, implement 2 modification measures of reservoir；
Step 10：After reservoir 2 is transformed, secondary operation or secondary stake are carried out.
In 3 above-mentioned embodiments, when reservoir properties or reservoir state meet design requirement, then do not implement described
Step 2：Perforation.
In 3 above-mentioned embodiments, liquid shelves requirement is designed when 6 original liquid-column height of well liquid in wellbore 1 meets, then not
Implement the step three：It files.
In 3 above-mentioned embodiments, step 3：Building gear, the specific method is as follows：
Situation is 1.：When 6 original liquid-column height of well liquid in wellbore 1 is more than design liquid shelves, established by tubing string fluid-discharge therapy
Design liquid shelves；
The specific method is as follows for tubing string fluid-discharge therapy：
The axle-linked cable-car 7 of switching mechanism is carried from 1 tripping in of wellbore, axle-linked cable-car 7 enters liquid level in wellbore 1, in wellbore 1
Liquid enters annular space, and 6 original fluid column of well liquid in annular space rises until excessive from well head；Continue tripping in axle-linked cable-car 7 to shaft bottom 3
Or design well section, the switching mechanism being arranged on axle-linked cable-car 7 is opened, the liquid in annular space flows into axle-linked cable-car 7, in annular space
Fluid column reduce, the fluid column in axle-linked cable-car 7 rises, and is formed after the fluid column in annular space is balanced with the fluid column in axle-linked cable-car 7
Liquid shelves：
If the liquid gear height formed injects the liquid of design flow to axle-linked cable-car 7 less than design liquid shelves, connection bucket connection is made to make
Reach design liquid gear height in tubing string 7 and in annular space；
If the liquid gear height formed in axle-linked cable-car 7 and in annular space is higher than design liquid shelves, adjustment and high energy gas pressure
Dose, burn rate and the pressure release area parameter split.
Situation is 2.：When 6 original liquid-column height of well liquid in wellbore 1 is less than design liquid shelves, design flow is filled into wellbore 1
Liquid establishes design liquid shelves；
Situation is 3.：When well depth is less than design liquid gear, the dose of high enegry gas fracturing, burn rate, pressure release area parameter are adjusted.
In 3 above-mentioned embodiments, an axle-linked cable-car 7 can be used to complete perforation of the present invention, build gear, high energy
At least two operations in gas pressure break and well cementation.
Above-mentioned axle-linked cable-car 7 widenable to stacker axle-linked cable-car, determine bucket axle-linked cable-car and connection bucket axle-linked cable-car, wherein：
Stacker axle-linked cable-car is connect with axle-linked cable-car 7 by stacker and is formed；
Determine bucket axle-linked cable-car and is formed by determining bucket, stacker and the connection of axle-linked cable-car 7；
Join bucket axle-linked cable-car one is being connect to form with axle-linked cable-car 7 by connection bucket, another kind is by connection bucket, stacker and connection
Make the connection composition of tubing string 7.
Lower mask body introduces the connection barrel structure of present invention connection bucket axle-linked cable-car, joins and is provided with intercommunicating pore and switching on and shutting down on bucket
Structure, when switching mechanism is closed, connection bucket axle-linked cable-car is hollow closed, when switching mechanism is opened, joins bucket axle-linked cable-car and the external world
It is connection.
The optional sliding connection bucket 4 of the connection bucket of the present invention, shock connection bucket, carrying a gun joins bucket or joins bucket with bullet, wherein：
It includes determine bucket to determine holding in bucket and hit seat 13 and impact hammer 14 with being set to hit connection bucket；Barrel side wall is being determined equipped with multigroup
It is closed to determine bottom of the barrel for intercommunicating pore；It is described to hold that hit seat 13 include blind circle 5, upper pressing cap, lower pressing cap, sealing element and baffle, it is described
Blind circle 5 is arranged at the top of upper pressing cap constitutes entirety with upper pressing cap, and the baffle is made of the pressure-resistant friable material such as glass, ceramics
Concave-convex lens body or meniscus body, the one or both sides of baffle be equipped with low force grid groove, the baffle convex surface downwardly toward
Downward pressure cap；The sealing element is fastened by upper and lower pressure cap, sealing element will hold hit seat 13 be divided to for upper and lower two mutually packing
Chamber, the circulation of upper and lower two-way blocking-up liquid, hit connection bucket close；Baffle is smashed with the impact hammer 14, holds and hits seat 13
Connection is hit connection bucket and is opened；
Sliding connection bucket 4 even include determine bucket be set to the cunning bucket determined in bucket, slide bar, jack rod sleeve, sealing element, position-limit mechanism and
Guiding mechanism；The cunning bucket and determines bucket and be equipped with multigroup intercommunicating pore；The cunning bucket bucket bottom, to determine bucket bucket bottom closed, in sliding bucket
Bucket bottom connects slide bar, determines bucket bucket bottom and is equipped with jack rod sleeve, and slide bar is fed through jack rod sleeve and stretches out, and is provided with and draws between sliding bucket and determining bucket
Mechanism is led, in sliding bucket and determines to be both provided with sealing element between bucket, slide bar and jack rod sleeve；The cunning bucket is under the guiding of guiding mechanism
It can determine linear slide in bucket, when the intercommunicating pore on sliding bucket is overlapped with the intercommunicating pore determined on bucket because of sliding bucket sliding, sliding connection bucket 4
It opens；Otherwise, sliding connection bucket 4 is closed；
Join bucket 4 in the sliding or hit connection bottom of the barrel connection perforating gun or high energy gas fracture bomb 8, forms the band
Rifle joins bucket or joins bucket with bullet.
The multigroup intercommunicating pore being arranged on the bucket is arranged in a matrix；In multigroup intercommunicating pore, the aperture at middle part is big, to
Above, downward aperture is small；The pitch-row at middle part is small, and upward, down bore is away from big；Middle part hole count is more, and upward, downward hole count is few.
The case where for embodiment 1, can be completed to build three gear, high enegry gas fracturing and well cementation operations with band bullet connection bucket,
It is referred to as detonation thribble column, detailed process is referring to Fig. 1, wherein Fig. 1（a）It is to build gear schematic diagram, Fig. 1（b）It is high energy gas pressure
Split schematic diagram, Fig. 1（c）It is well cementation schematic diagram.
The case where for embodiment 2 or 3, can complete to build two operations of gear and high enegry gas fracturing, quilt with band bullet connection bucket
Referred to as detonation duplex tubing string, detailed process is referring to Fig. 2, wherein Fig. 2（a）It is to build gear schematic diagram, Fig. 2（b）It is high enegry gas fracturing
Schematic diagram, Fig. 2（c）It is well cementation schematic diagram.
In step 4：In high enegry gas fracturing, it is high for how controlling man-made fracture range, preventing man-made fracture from extending downwardly
The key points and difficulties of energy gas pressure break process, the present invention are solved by following measure：
（1）The multigroup intercommunicating pore being arranged on the connection bucket of axle-linked cable-car 7 provides the high temperature and pressure that liquid and powder burning generate
The channel that gas flows in and out, the outflow and inflow of the high temperature and high pressure gas and liquid that control powder burning generates, passes through control
The high temperature and high pressure gas elution volume and aerial drainage height that powder burning processed generates, and the extension of man-made fracture is controlled, priority control
Man-made fracture is longitudinally extended.
（2）Determine bucket and join bucket bucket bottom block and limit powder burning generate high temperature and high pressure gas flow downward out and expand
It dissipates, control man-made fracture extends downwardly.
（3）Step four high enegry gas fracturing be under reservoir 2 is naked state, without cement sheath 12 when implement
, by the control of the high temperature and high pressure gas range of scatter, elution volume and pressure release height that are generated to powder burning, by generation
Man-made fracture controls within reservoir 2.
（4）After 1 running string of wellbore or stacker axle-linked cable-car to 2 top of reservoir, out of tubing string or stacker connection is made
Tripping in locator 10, igniter 9 and high energy gas fracture bomb 8 in tubing string, and high energy gas fracture bomb 8 is made to pass through tubing string or undertaking
High enegry gas fracturing is implemented in seat axle-linked cable-car end to the precalculated position of 2 well section of reservoir to reservoir 2.Pass through tubing string or stacker
The high temperature and high pressure gas that axle-linked cable-car limitation powder burning generates diffuses up, and is upwardly extended to limit man-made fracture.It is boring
Wear reservoir 2 without be drilled into finishing drilling well depth or bore open reservoir 2 without drilling reservoir 2 when, by current shaft bottom 3 block powder burning production
Raw high temperature and high pressure gas is spread downwards, is extended downwardly to limit man-made fracture.
In addition, the high enegry gas fracturing of the present invention includes rope transmission high enegry gas fracturing and tubing string transmission high energy gas pressure
It splits, rope transmits high enegry gas fracturing and tubing string transmission high enegry gas fracturing is known to those skilled in the art.
Wherein：
Rope transmission high enegry gas fracturing is to connect locator 10, igniter 9 and high energy gas fracture bomb 8 and transmission rope
It connects, with devices such as transmission rope conveying locator 10, igniter 9, high energy gas fracture bombs 8 to predetermined well section, in ground or well
Under ignite high energy gas fracture bomb 8, finally act locator 10, igniter 9,8 frame of high energy gas fracture bomb etc. with transmission rope
Device completes high enegry gas fracturing；
It is to connect igniter 9, high energy gas fracture bomb 8 with tubing string that tubing string, which transmits high energy gas fracturing device, uses tubing string
Igniter 9, the devices such as high energy gas fracture bomb 8 to predetermined well section are conveyed, are ignited high energy gas fracture bomb 8 on ground or underground,
The devices such as tubing string, igniter 9,8 frame of high energy gas fracture bomb are finally played out, high enegry gas fracturing is completed；
In the present invention, the annular space, tubing string, transmission rope, current shaft bottom are known to those skilled in the art.
Wherein：
The annular space be from wellbore 1 or pit shaft tubing string and wellbore 1 or pit shaft outside tubing string, in wellbore 1 or pit shaft
The annular space of interior formation；
The tubing string is made of oil pipe, drilling rod or casing connection；
The transmission rope is cable 11, steel wire or steel wire rope；
The current shaft bottom is the shaft bottom before non-finishing drilling.
Present disclosure is not limited to cited by embodiment, and those of ordinary skill in the art are by reading description of the invention
And to any equivalent transformation that technical solution of the present invention is taken, it is that claim of the invention is covered.
Claims (2)
1. a kind of completion mode with protection reservoir packing function, it is characterised in that：
Specifically include following steps：
Step 1：Drilling well：Drill layer reservoir to finishing drilling well depth or drill reservoir without be drilled into finishing drilling well depth or bore open reservoir without
Drill reservoir；
Step 2：Well logging：Comprehensive logging；
Step 3：Open-hole shooting：The duct of predetermined depth is established in reservoir near wellbore zone；
Step 4：Build gear：It is kept off in the built-in meter liquid that erects of wellbore, high enegry gas fracturing parameter is calculated and determined according to design liquid shelves；
Step 5：High enegry gas fracturing：High enegry gas fracturing at least once is implemented at least one layer of reservoir, in reservoir near wellbore zone
Form man-made fracture；
Step 6：If step 1 drilling well selection drills reservoir and opens reservoir without drilling reservoir without being drilled into finishing drilling well depth or boring,
After follow-up hole to finishing drilling well depth；
Step 7：Well cementation：Cement sheath is formed in annular space between reservoir casing and wellbore；
Step 8：Well-case perforating：Be shot through reservoir casing and cement sheath and penetrate reservoir to predetermined depth, establish reservoir and pit shaft it
Between duct；
Step 9：It goes into operation or bets；
Step 10：If pilot production or injection test are not up to pre-provisioning request, implement reservoir reconstruction measure；
Step 11：After reservoir reconstruction, secondary operation or secondary stake are carried out；
Filing in the step 3 specifically includes：
When original liquid-column height in wellbore is more than design liquid shelves, design liquid shelves are established by tubing string fluid-discharge therapy；
When original liquid-column height in wellbore is less than design liquid shelves, the injection design quantity of fluid into wellbore establishes design liquid shelves；
When well depth is less than design liquid gear, the dose of high enegry gas fracturing, burn rate, pressure release area parameter are adjusted；
When original liquid-column height when in wellbore is more than design liquid shelves, meter liquid is erected wellbore is built-in by tubing string fluid-discharge therapy
Shelves, the specific method is as follows：
Join bucket axle-linked cable-car from wellbore tripping in, when connection bucket axle-linked cable-car enters liquid level in wellbore, the liquid in wellbore enters annular space,
Original fluid column in annular space rises until excessive from well head；Continue tripping in and join bucket axle-linked cable-car to shaft bottom or design well section, opens
Switching mechanism on connection bucket is set, and the liquid in annular space flows into connection bucket axle-linked cable-car, and the fluid column in annular space reduces, connection bucket connection
The fluid column made in tubing string rises, and liquid shelves are formed after the fluid column in annular space is balanced with the fluid column in connection bucket axle-linked cable-car：
If the liquid gear height formed injects the liquid of design flow into connection bucket axle-linked cable-car, connection bucket is made to join less than design liquid shelves
Make to reach design liquid gear height in tubing string and in annular space；
If the liquid gear height formed in axle-linked cable-car and in annular space is higher than design liquid shelves, the medicine of adjustment and high enegry gas fracturing
Amount, burn rate and pressure release area parameter；
The connection bucket axle-linked cable-car includes the connection bucket and tubing string being integrally connected；The connection bucket can be selected sliding connection bucket, hit
Connection bucket, carrying a gun joins bucket or joins bucket with bullet, wherein：
Sliding connection bucket includes even determining bucket and being set to cunning bucket, slide bar, jack rod sleeve, sealing element, position-limit mechanism and the guiding determined in bucket
Mechanism；The cunning bucket and determines bucket and be equipped with multigroup intercommunicating pore；The cunning bucket bucket bottom, to determine bucket bucket bottom closed, at sliding bucket bucket bottom
Slide bar is connected, bucket bucket bottom is determined and is equipped with jack rod sleeve, slide bar is fed through jack rod sleeve and stretches out, and in sliding bucket and determines to be provided with vectoring aircraft between bucket
Structure in sliding bucket and is determined to be both provided with sealing element between bucket, slide bar and jack rod sleeve；The cunning bucket can be under the guiding of guiding mechanism
Determine linear slide in bucket, when the intercommunicating pore on sliding bucket is overlapped with the intercommunicating pore determined on bucket because of sliding bucket sliding, sliding connection bucket is opened；
Otherwise, sliding connection bucket is closed；
It includes determine bucket to determine holding in bucket and hit seat and impact hammer with being set to hit connection bucket；It is equipped with multigroup intercommunicating pore determining barrel side wall,
It is closed to determine bottom of the barrel；Described to hold that hit seat include blind circle, upper pressing cap, lower pressing cap, sealing element and baffle, blind circle setting exists
It is concave-convex lens made of the pressure-resistant friable material such as glass, ceramics to constitute whole, described baffle with upper pressing cap at the top of upper pressing cap
Body or meniscus body, the one or both sides of baffle are equipped with low force grid groove, the baffle convex surface downwardly lower pressing cap；Institute
The sealing element stated is fastened by upper and lower pressure cap, and sealing element, which will be held, to be hit seat and be divided into upper and lower two chambers insulated mutually, upper and lower double
To the circulation for blocking liquid, hits connection bucket and close；Baffle is smashed with the impact hammer, holds and hits seat connection, connection bucket is hit and opens；
In the cunning bucket bucket bottom connection perforating gun or high energy gas fracture bomb of the sliding connection bucket, carry a gun connection bucket or the band are formed
Bullet joins bucket.
2. the completion mode with protection reservoir packing function according to claim 1, it is characterised in that：
The multigroup intercommunicating pore being arranged on the bucket is arranged in a matrix；In multigroup intercommunicating pore, the aperture at middle part is big, upwards, to
Lower aperture is small；The pitch-row at middle part is small, and upward, down bore is away from big；Middle part hole count is more, and upward, downward hole count is few.
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| CN108222911B (en) * | 2017-12-27 | 2020-03-20 | 中国海洋石油集团有限公司 | Horizontal open hole well production increasing completion pipe string and combined operation method |
| CN108756845B (en) * | 2018-05-03 | 2023-05-12 | 肖毅 | Capacity-expansion increment deflagration fracturing method |
| CN112377164B (en) * | 2020-11-16 | 2022-06-28 | 东北石油大学 | Foaming mechanism, high-energy gas foam fracturing device and process |
| CN114658397B (en) * | 2022-04-15 | 2022-10-21 | 吉林市双林射孔器材有限责任公司 | Oil gas well casing slotting mesh-making perforator |
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