CN104963656B - A kind of casing programme and its installation method for natural petroleum gas field - Google Patents
A kind of casing programme and its installation method for natural petroleum gas field Download PDFInfo
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- CN104963656B CN104963656B CN201510151847.4A CN201510151847A CN104963656B CN 104963656 B CN104963656 B CN 104963656B CN 201510151847 A CN201510151847 A CN 201510151847A CN 104963656 B CN104963656 B CN 104963656B
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- 239000003209 petroleum derivative Substances 0.000 title claims abstract description 24
- 238000009434 installation Methods 0.000 title claims abstract description 17
- 239000004568 cement Substances 0.000 claims description 24
- 230000000977 initiatory effect Effects 0.000 claims description 9
- 241000269793 Cryothenia peninsulae Species 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 16
- 239000007789 gas Substances 0.000 description 23
- 238000005553 drilling Methods 0.000 description 10
- 239000012530 fluid Substances 0.000 description 8
- 230000008901 benefit Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000011083 cement mortar Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 239000011257 shell material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
The present invention relates to natural petroleum gas field field, disclose a kind of casing programme and its installation method for natural petroleum gas field, the casing programme includes outer layer sleeve (10), the inner layer sleeve (20) for setting and being stretched out from the outer layer sleeve (10) along the length direction of the outer layer sleeve (10) and the oil pipe (30) for extending along the length direction of the inner layer sleeve (20) and being stretched out from the inner layer sleeve (20), the periphery and bottom of the pipeline section of at least stretching inner layer sleeve (20) of the oil pipe (30) are provided with the first well cementation layer (40) for cementing the well, the oil pipe (30) and the corresponding position of the first well cementation layer (40) are provided with the oil gas input structure for making oil gas enter the oil pipe (30).In the present invention, the oil pipe for being served only for production in casing programme of the prior art is doubled as being production casing, so as to reduce the consumption of tubing, cost is reduced.
Description
Technical field
The present invention relates to natural petroleum gas field instrument, in particular it relates to a kind of well bore for natural petroleum gas field
Structure and its installation method.
Background technology
With the development of economy and society, the exploitation dynamics of offshore oil natural gas is increasing.And opened in petroleum gas
During adopting, casing programme is played and its important effect, briefly, casing programme are built upon ground and subterranean oil gas-bearing formation
Between a gas channel.
Casing programme of the prior art includes outermost surface pipe, the protective casing in intermediate layer and innermost layer
Production casing, the outside of production casing is provided with cement sheath.The surface pipe, protective casing and production casing formation one
Passage, is provided with the oil pipe for conveying oil gas in the passage.
However, when exploiting middle-size and small-size and marginal field using above-mentioned casing programme, cost is higher, it is difficult to realize oil
Gas economic is effectively developed.For this reason, it may be necessary to a kind of simple in construction, lower-cost casing programme be provided, to realize oil
Gas economic is effectively developed.
The content of the invention
It is an object of the invention to provide a kind of casing programme and its installation method for natural petroleum gas field, to overcome
Cost is higher in the prior art, it is difficult to realize the problem of petroleum gas economical and effective is developed.
To achieve these goals, the present invention provides a kind of casing programme for natural petroleum gas field, the well bore knot
Structure include outer layer sleeve, along the outer layer sleeve length direction set and from the outer layer sleeve stretch out inner layer sleeve and
Length direction extension and the oil pipe that stretches out from the inner layer sleeve along the inner layer sleeve, described at least stretching of the oil pipe
The periphery and bottom of the pipeline section of inner layer sleeve are provided with the first well cementation layer for cementing the well, the oil pipe and the first well cementation layer
Corresponding position is provided with the oil gas input structure for making oil gas enter the oil pipe.
Preferably, the pipeline section at least stretching out the outer layer sleeve of the periphery of the outer layer sleeve and the inner layer sleeve
Periphery is equipped with the second well cementation layer, the second well cementation layer of the inner layer sleeve and second well cementation of the outer layer sleeve
Layer is connected with each other, and the second well cementation layer of the inner layer sleeve is connected with each other with the described first well cementation layer.
Preferably, it is described first well cementation layer and second well cementation layer be cement layer.
Preferably, the oil gas input structure is the perforation to be formed on the oil pipe and the first well cementation layer.
Preferably, the upper initiating terminal of the inner layer sleeve, the upper initiating terminal of the outer layer sleeve and the oil pipe is upper
Initiating terminal is respectively positioned on the pithead position of the casing programme.
Preferably, length direction of the casing programme including the well head from the casing programme along the oil pipe is set gradually
Safety valve, side-pocket mandrel and circulating valve on the oil pipe.
Preferably, the oil pipe include the first oil pipe and along first oil pipe length direction extension and with described the
Second oil pipe of one tubing seal connection.
Preferably, first oil pipe is located at the second oil pipe top, and second oil pipe is stretched from the inner layer sleeve
Go out, the safety valve, side-pocket mandrel and circulating valve are arranged on first oil pipe and the safety valve, eccentric work
Cylinder and circulating valve be respectively can cement the well formula storm valve, the formula that can cement the well side-pocket mandrel and the formula circulating valve that can cement the well.
The present invention also provides a kind of installation method of the casing programme for natural petroleum gas field, and the casing programme is
Above-mentioned casing programme, the installation method comprises the following steps：
S1：By the outer layer sleeve tripping in into the first well being drilled；
S2：By the inner layer sleeve tripping in into the second well being drilled；
S3：By the oil pipe tripping in into the third wellbore being drilled；
S4：Described first is set to consolidate in the periphery of the pipeline section at least stretching out the inner layer sleeve of the oil pipe and bottom
Well layer, and form the oil gas for making oil gas enter the oil pipe in the oil pipe position corresponding with the described first well cementation layer
Input structure.
The present invention also provides a kind of installation method of the casing programme for natural petroleum gas field, and the casing programme is
Above-mentioned casing programme, the installation method comprises the following steps：
S1：By the outer layer sleeve tripping in into the first well being drilled；
S2：By the inner layer sleeve tripping in into the second well being drilled；
S3：By the second oil pipe tripping in into the third wellbore being drilled；
S4：Described first is set in the pipeline section periphery at least stretching out the inner layer sleeve of second oil pipe and bottom
Well cementation layer, and formed in second oil pipe position corresponding with the described first well cementation layer for making oil gas enter the oil pipe
Oil gas input structure；
S5：Length direction tripping in by first oil pipe along second oil pipe simultaneously connects with second tubing seal
Connect.
In the present invention, it is production casing that the oil pipe for being served only for production in casing programme of the prior art, which is doubled as, from
And the consumption of tubing is reduced, reduce cost.
Other features and advantages of the present invention will be described in detail in subsequent embodiment part.
Brief description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute a part for specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the schematic diagram for the casing programme for natural petroleum gas field that embodiments of the present invention are provided.
Fig. 2 is the schematic diagram for the casing programme for natural petroleum gas field that another embodiment of the present invention is provided.
Description of reference numerals
10：Outer layer sleeve； 20：Inner layer sleeve； 30：Oil pipe；
31：First oil pipe； 32：Second oil pipe； 40：First well cementation layer；
50：Second well cementation layer； 60：Perforation； 70：Safety valve；
80：Side-pocket mandrel； 90：Circulating valve. 100：Tail pipe is hung；
200：Float collar； 300：Float shoe.
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
In the present invention, in the case where not making opposite explanation, the noun of locality used such as " upper and lower, left and right " is typically referred to
Upper and lower, left and right shown in refer to the attached drawing；" inside and outside " refers to the inside and outside of the profile relative to each part in itself.
The present invention is the cost existed based on casing programme of the prior art when exploiting middle-size and small-size and marginal field
It is higher, it is difficult to which that realizing the problem of petroleum gas economical and effective is developed, there is provided simple in construction, the lower-cost well bore knot of one kind
Structure, with reference to Fig. 1 and Fig. 2, the present invention will be described in detail.
As shown in figure 1, including outer layer sleeve 10, along outer provided by the present invention for the casing programme of natural petroleum gas field
The length direction of layer sleeve pipe 10 is set and the inner layer sleeve 20 stretched out from outer layer sleeve 10 and the length side along inner layer sleeve 20
The oil pipe 30 stretched out to extension and from inner layer sleeve 20, the periphery and bottom of the pipeline section at least stretching out inner layer sleeve 20 of oil pipe 30
Portion is provided with the first well cementation layer 40 for cementing the well, and the corresponding position of the well cementation layer 40 of oil pipe 30 and first is provided with for making oil gas
Into the oil gas input structure of oil pipe 30.
It should be noted that above-mentioned outer layer sleeve 10 can be the surface pipe of casing programme in the prior art, internal layer set
Pipe 20 can be the protective casing of casing programme in the prior art.Furthermore it is possible to set float collar 200 and float shoe in the lower end of oil pipe
300, wherein float collar 200 is arranged on away from casing string (tubing string of the oil pipe 30 namely in the present invention) 20~30 meters of end, is risen
The effect of retainer ring and back pressure valve, float shoe 300 is arranged on casing string (tubing string of the oil pipe 30 namely in the present invention) end,
Play guide shoe and back pressure valve.It should be noted that so-called back pressure valve is a kind of interior jet-preventing tool in drilling process,
It is a ball-and-seat, can prevents formation fluid from entering by bit port in drilling tool when blowout.So-called guide shoe refers to use
What the pig iron, cement or hardwood were made is connected on a cone of casing string bottom, scrapes or inserts to prevent sleeve pipe base opening from touching
The borehole wall, to shaft bottom under guiding sleeve (referring to oil pipe 30 here) is smooth.
In the present invention, it is production casing that the oil pipe for being served only for production in casing programme of the prior art, which is doubled as, from
And the consumption of tubing is reduced, reduce cost.Casing programme of the prior art is additionally, since with two passages, that is, is used
Annular space between the oil pipe and oil pipe and production casing of production of hydrocarbons, and the casing programme in the present invention only has one
Individual passage, the i.e. oil pipe 30 for production of hydrocarbons, it is seen that the space that the casing programme in the present invention takes is smaller, in other words,
The borehole size for being used to install outer layer sleeve 10, inner layer sleeve 20 and oil pipe 30 in the present invention has subtracted relative to prior art
Small (this point is better able to explanation by table 1 below), therefore the engineering time is significantly reduced, and save drilling fluid and solid
Well material.
Table 1：The comparison of casing programme of the prior art and the casing programme of the present invention
Through comparing, each borehole size of casing programme of the invention is to should be less than casing programme of the prior art
Each borehole size, so that the casing programme in the present invention has advantages below：1) caving pressure on stratum will be reduced, well
Wall is difficult unstability and collapsed；2) overall rate of penetration is significantly improved, the activity duration shorten (because, borehole size reduces, on
The rate of penetration of portion's well section is increased substantially, and only bottom shortens rate of penetration after slim-hole size into and just has decline)；3) due to
Each borehole size reduces, so as to correspond ground sleeve pipe (outer layer sleeve 10, inner layer sleeve 20 and oil pipe 30) size
Reduce, and then shell material weight is greatly reduced, reduce tubing expense.
In order to realize well cementation, the periphery of the outer layer sleeve 10 and the pipe at least stretching out outer layer sleeve 10 of inner layer sleeve 20
The periphery of section is equipped with the second well cementation layer 50, the second well cementation layer 50 of inner layer sleeve 20 and the second well cementation layer 50 of outer layer sleeve 10
It is connected with each other, and the second well cementation layer 50 of inner layer sleeve 20 is connected with each other with the first well cementation layer 40, wherein, the first well cementation He of layer 40
The material of second well cementation layer 50 can have a variety of, and the material of the such as first well cementation well cementation layer 50 of layer 40 and second can be cement.
Wherein, the oil gas input structure in casing programme is used for by oil-gas transportation into oil pipe 30, and for example oil gas is inputted
Structure can be the perforation 60 cemented the well by perforator formation in oil pipe 30 and first on layer 40.
For easy for installation, Stability Analysis of Structures, the upper initiating terminal of the inner layer sleeve 20, the upper initiating terminal of outer layer sleeve 10 with
And the upper initiating terminal of oil pipe 30 is respectively positioned on the pithead position of casing programme.
In addition, the operation in order to meet casing programme, the casing programme is included from the well head of casing programme along oil pipe 30
Length direction is successively set on safety valve 70, side-pocket mandrel 80 and circulating valve 90 on oil pipe 30.And in view of well cementation
Problem, prevents that well cementing material (such as cement mortar) passes through shadow when safety valve 70, side-pocket mandrel 80 and circulating valve 90 during well cementation
Respective service behaviour is rung, preferably described safety valve 70, side-pocket mandrel 80 and circulating valve 90 are respectively the formula underground that can cement the well
Safety valve, the formula that can cement the well side-pocket mandrel and the formula circulating valve that can cement the well.Herein it should be noted that so-called formula underground peace of cementing the well
Full valve, the formula that can cement the well side-pocket mandrel and the formula circulating valve that can cement the well refer to that cement mortar passes through storm valve, bias in well cementation
During the downhole tools such as seating nipple, the normal of these instruments is not influenceed to use.
The oil pipe 30 can include the first oil pipe 31 and along the first oil pipe 31 length direction extension and with first oil
The second oil pipe 32 that pipe 31 is tightly connected, specifically, the first oil pipe 31 are located at the top of the second oil pipe 32, and the second oil pipe 32 is from internal layer
Sleeve pipe 20 is stretched out, and now safety valve 70, side-pocket mandrel 80 and circulating valve 90 can be arranged on the first oil pipe 31.Herein
It should be noted that being tightly connected between the first oil pipe 31 and the second oil pipe 32 can be by setting in the upper end of the second oil pipe 32
Put tail pipe and hang 100,100 corresponding structures are hung with the tail pipe while being set in the lower end of the first oil pipe 31, so as to realize first
Being tightly connected between the oil pipe 32 of oil pipe 31 and second.
According to another aspect of the present invention, the present invention also provides a kind of casing programme for natural petroleum gas field
Installation method, casing programme here can be above-mentioned casing programme, and the installation method comprises the following steps：
S1：By the tripping in of outer layer sleeve 10 into the first well being drilled；
S2：By the tripping in of inner layer sleeve 20 into the second well being drilled；
S3：By the tripping in of oil pipe 30 into the third wellbore being drilled；
It should be noted that above-mentioned second well is in the lower section of the first well and diameter is less than first well, so that
Form shoulder hole；Above-mentioned third wellbore is in the lower section of the second well and diameter is less than second well, so as to form shoulder hole.
S4：In the periphery and bottom of the pipeline section at least stretching out inner layer sleeve 20 of oil pipe 30, the first well cementation layer 40 is set,
And form the oil gas input structure for making oil gas enter oil pipe 30 in the corresponding position of the well cementation layer 40 of oil pipe 30 and first.
The above method has advantages below：Outer layer sleeve 10, inner layer sleeve 20 and oil pipe 30 are installed using the above method,
Make 30 times tripping in of oil pipe to its well, operation procedure is simple, and short time limit, expense is low, can preferably improve the exploitation of oil gas field
Benefit, meanwhile, in the corresponding casing programme of the program, to prevent that well cementing material (such as cement mortar) is by safety valve during well cementation
70th, side-pocket mandrel 80 and respective service behaviour is influenceed during circulating valve 90, preferably described safety valve 70, side-pocket mandrel 80
And circulating valve 90 is respectively can cement the well formula storm valve, the formula that can cement the well side-pocket mandrel and the formula circulating valve that can cement the well.
According to a further aspect of the invention, the present invention also provides a kind of casing programme for natural petroleum gas field
Installation method, casing programme here can be above-mentioned casing programme, and the installation method comprises the following steps：
S1：By the tripping in of outer layer sleeve 10 into the first well being drilled；
S2：By the tripping in of inner layer sleeve 20 into the second well being drilled；
S3：By the tripping in of the second oil pipe 32 into the third wellbore being drilled；
As described above, above-mentioned second well is in the lower section of the first well and diameter is less than first well, so as to be formed
Shoulder hole；Above-mentioned third wellbore is in the lower section of the second well and diameter is less than second well, so as to form shoulder hole.
S4：In the pipeline section periphery and bottom of at least stretching out inner layer sleeve 20 of the second oil pipe 32, first well cementation is set
Layer 40, and formed in the second oil pipe 32 and the corresponding position of the first well cementation layer 40 for making the oil gas of oil gas into oil pipe 30 defeated
Enter structure；
S5：Length direction tripping in by the first oil pipe 31 along the second oil pipe 32 is simultaneously tightly connected with the second oil pipe 32.
This method has advantages below：First oil pipe on top is also arranged on when being cemented the well due to the second oil pipe 32 without tripping in
31, and the downhole tools such as safety valve 70, side-pocket mandrel 80 and circulating valve 90 are provided with the first oil pipe 31, therefore, well cementation
Material (cement mortar) will not be impacted to the performance of these instruments, so as to use conventional safety valve 70, eccentric work
Cylinder 80 and circulating valve 90 without use can cement the well formula storm valve, the formula that can cement the well side-pocket mandrel and the formula that can cement the well circulation
Valve, job safety, economic and reliable, and also according to actual needs, the later stage can play out the first oil pipe 31 at any time, carry out well workover or sidetracking
Deng operation.
The casing programme that the present invention is provided, not only saves expense in drilling process, while also being saved in completion practice
Expense, specifically, it is production casing to double as oil pipe in the present invention, after drillng operation terminates tripping in oil pipe 30, drill ship
Well site can be just withdrawn, the operation of oil pipe cable perforation can be carried out in production platform, the expense for renting drill ship can be reduced；Moreover,
Casing programme well control risk is small in the present invention, because tearing preventer group and rise pipe open, installing in production tree device procedures, ground
Layer is not connected with pit shaft；Perforating job is after the completion of the installation of production tree equipment, pressure testing, and well control risk is small in operation process；Meanwhile,
The casing programme of the present invention is conducive to reservoir protection, because directly being gone into operation without kill-job after perforation, perforation after tripping in oil pipe, saves
The kill-job activity duration, no well killing fluid is contacted with stratum, and the time of contact on completion fluid and stratum is greatly reduced, completion fluid is several
Without leakage, the injury to stratum is reduced.
Beneficial effects of the present invention will be hereafter illustrated by specific embodiment, the oil pipe 30 in the embodiment is wrapped
The first oil pipe 31 and the second oil pipe 32 are included, the finishing drilling well depth of the casing programme is 3613m, specifically, first, bores size (diameter)
Well (the first well i.e. above) for 311.15mm is simultaneously drilled into 1457m, then that outer layer sleeve 10 is (a diameter of
244.48mm) tripping in is to 1452m；Secondly, size (diameter) is bored for 215.9mm well (the second well i.e. above) and is drilled into
2960m, then by the (a diameter of 177.8) tripping in 2950m of inner layer sleeve 20；Finally, bore size for 152.4mm well (i.e.
Third wellbore above) and 3650m is drilled into, then by the (a diameter of 88.9) tripping in 3608m of the second oil pipe 32.
Above-mentioned drilling completion operation is substantially smooth, and gas well yield has reached expected volume, and saves expense, reduces
Activity duration, huge economic benefit is realized, be embodied in following several respects：
1) tubing and casing expense is saved, specifically, under the conditions of identical well depth, casing programme and prior art in the present invention
In casing programme compare, oil pipe 30 and sleeve pipe (outer layer sleeve 10 and inner layer sleeve 20) gross weight used compared with prior art reduce
135.74 tons (about 33%)；
2) Master Costs such as drilling fluid and cementing slurry are reduced, specifically, the casing programme in the present invention is more existing
Casing programme wellbore volume in technology reduces more than 50%, thus, related landwaste handling, drilling fluid, completion fluid expense
About half is reduced, moreover, sleeve pipe (outer layer sleeve 10 and inner layer sleeve 20) annular volume of the casing programme in the present invention is reduced
More than 50%, thus, related cementing slurry expense reduces 43% in original basis；
3) requirement of cleaning well cementation is met, specifically, the well cementation of the second oil pipe 32 in casing programme in the present invention
Smoothly, later stage perforating job removes unobstructed, and the pipe string internal wall of the second oil pipe 32 does not remain cement mortar for operation.
4) significantly shorten and be drilled the well operations time, it is specifically, 27.39 days casing programme drilling well durations in the present invention, complete
4.92 days well durations, compared with casing programme of the prior art, the casing programme drilling well duration shortens 4.2%, completion period
Shorten 44.78%, significantly reduce brill Completion cost, realize cost-effective exploitation.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, still, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the present invention, a variety of letters can be carried out to technical scheme
Monotropic type, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, it can be combined by any suitable means.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (6)
1. a kind of casing programme for natural petroleum gas field, it is characterised in that the casing programme include outer layer sleeve (10),
Set along the length direction of the outer layer sleeve (10) and the inner layer sleeve (20) stretched out from the outer layer sleeve (10) and edge
The length direction extension of the inner layer sleeve (20) and the oil pipe (30) stretched out from the inner layer sleeve (20), the oil pipe (30)
At least stretching inner layer sleeve (20) pipeline section periphery and bottom be provided with for cement the well first well cementation layer (40), institute
State oil pipe (30) and the corresponding position of the first well cementation layer (40) is provided with for making oil gas enter the oil pipe (30)
Oil gas input structure, length direction of the casing programme including the well head from the casing programme along the oil pipe (30) is set successively
Safety valve (70), side-pocket mandrel (80) and circulating valve (90) on the oil pipe (30) are put, the oil pipe (30) includes
First oil pipe (31) and along first oil pipe (31) length direction extend and be tightly connected with first oil pipe (31)
The second oil pipe (32), first oil pipe (31) is located at the second oil pipe (32) top, and second oil pipe (32) is from institute
Inner layer sleeve (20) stretching is stated, the safety valve (70), side-pocket mandrel (80) and circulating valve (90) are arranged at described the
On one oil pipe (31) and the safety valve (70), side-pocket mandrel (80) and circulating valve (90) be respectively can cement the well formula underground peace
Full valve, the formula that can cement the well side-pocket mandrel and the formula circulating valve that can cement the well.
2. the casing programme according to claim 1 for natural petroleum gas field, it is characterised in that the outer layer sleeve
(10) periphery and the periphery of the pipeline section of at least stretching outer layer sleeve (10) of the inner layer sleeve (20) is equipped with second
Well cementation layer (50), the second well cementation layer (50) of the inner layer sleeve (20) is consolidated with described the second of the outer layer sleeve (10)
Well layer (50) is connected with each other, and the second well cementation layer (50) and described first well cementation layer (40) phase of the inner layer sleeve (20)
Connect.
3. the casing programme according to claim 2 for natural petroleum gas field, it is characterised in that first well cementation
Layer (40) and second cement the well layer (50) be cement layer.
4. the casing programme according to claim 1 for natural petroleum gas field, it is characterised in that the oil gas input
Structure is the perforation (60) formed on the oil pipe (30) and the first well cementation layer (40).
5. the casing programme according to claim 4 for natural petroleum gas field, it is characterised in that the inner layer sleeve
(20) the upper initiating terminal of upper initiating terminal, the upper initiating terminal of the outer layer sleeve (10) and the oil pipe (30) is respectively positioned on described
The pithead position of casing programme.
6. the installation method of a kind of casing programme for natural petroleum gas field, it is characterised in that the casing programme is power
Profit requires the casing programme described in any one in 1-5, and the installation method comprises the following steps：
S1：By the outer layer sleeve (10) tripping in into the first well being drilled；
S2：By the inner layer sleeve (20) tripping in into the second well being drilled；
S3：By the second oil pipe (32) tripping in into the third wellbore being drilled；
S4：Set described in the pipeline section periphery of at least stretching inner layer sleeve (20) of second oil pipe (32) and bottom
First well cementation layer (40), and formed in second oil pipe (32) and the corresponding position of the first well cementation layer (40) for making
Oil gas enters the oil gas input structure of the oil pipe (30)；
S5：Length direction tripping in by first oil pipe (31) along second oil pipe (32) and with second oil pipe (32)
It is tightly connected.
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| CN106593382A (en) * | 2017-02-09 | 2017-04-26 | 撒占东 | Method for collecting natural gas from producing well |
| CN106968650B (en) * | 2017-03-21 | 2019-03-15 | 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 method of administering surface pipe and gas-bearing formation casing annulus has channeling |
| CN108049816A (en) * | 2017-12-11 | 2018-05-18 | 中国海洋石油集团有限公司 | The narrow pressure window well four of deep water opens time Casing Program Design Method |
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| US20050067163A1 (en) * | 2003-09-25 | 2005-03-31 | George Flint R. | Monobore release for tubing conveyed perforating |
| CN101649740B (en) * | 2009-09-03 | 2011-08-31 | 周福宝 | Ground bored well body structure for gas extraction |
| CN203685139U (en) * | 2013-12-26 | 2014-07-02 | 中国海洋石油总公司 | Integrated pipe column for perforation, fracture and oil extraction for directional well on the sea |
| CN104405281B (en) * | 2014-10-20 | 2016-02-03 | 山西蓝焰煤层气集团有限责任公司 | One crosses goaf casing drilling process |
| CN204571946U (en) * | 2015-04-01 | 2015-08-19 | 中国海洋石油总公司 | A kind of casing programme for natural petroleum gas field |
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2015
- 2015-04-01 CN CN201510151847.4A patent/CN104963656B/en active Active
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