CN107722954A - A kind of sealing agent, leak stopping slurries and leak-blocking construction method for borehole wall fractures leakage - Google Patents
A kind of sealing agent, leak stopping slurries and leak-blocking construction method for borehole wall fractures leakage Download PDFInfo
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- CN107722954A CN107722954A CN201711058750.4A CN201711058750A CN107722954A CN 107722954 A CN107722954 A CN 107722954A CN 201711058750 A CN201711058750 A CN 201711058750A CN 107722954 A CN107722954 A CN 107722954A
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- 239000002002 slurry Substances 0.000 title claims abstract description 57
- 238000007789 sealing Methods 0.000 title claims abstract description 37
- 238000010276 construction Methods 0.000 title claims abstract description 27
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 49
- 239000000835 fiber Substances 0.000 claims abstract description 40
- 239000010425 asbestos Substances 0.000 claims abstract description 39
- 229910052895 riebeckite Inorganic materials 0.000 claims abstract description 39
- 239000004568 cement Substances 0.000 claims abstract description 38
- 239000011324 bead Substances 0.000 claims abstract description 19
- 238000007667 floating Methods 0.000 claims abstract description 19
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 16
- 239000010703 silicon Substances 0.000 claims abstract description 16
- 238000005553 drilling Methods 0.000 claims description 54
- 238000013461 design Methods 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 230000003068 static effect Effects 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 8
- 238000001802 infusion Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 6
- 238000007569 slipcasting Methods 0.000 claims description 6
- 230000008961 swelling Effects 0.000 claims description 6
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 5
- 229920002125 Sokalan® Polymers 0.000 claims description 5
- 238000013329 compounding Methods 0.000 claims description 5
- 238000010327 methods by industry Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000004584 polyacrylic acid Substances 0.000 claims description 5
- 229910052700 potassium Inorganic materials 0.000 claims description 5
- 239000011591 potassium Substances 0.000 claims description 5
- 238000004064 recycling Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 6
- 230000009471 action Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 11
- 238000005755 formation reaction Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 125000006850 spacer group Chemical group 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 4
- 239000011083 cement mortar Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000001186 cumulative effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 230000008719 thickening Effects 0.000 description 3
- 229920002472 Starch Polymers 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 238000009955 starching Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 206010018852 Haematoma Diseases 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000010428 baryte Substances 0.000 description 1
- 229910052601 baryte Inorganic materials 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 230000009974 thixotropic effect Effects 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
- C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
- C09K8/487—Fluid loss control additives; Additives for reducing or preventing circulation loss
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/426—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
- C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/08—Fiber-containing well treatment fluids
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/18—Bridging agents, i.e. particles for temporarily filling the pores of a formation; Graded salts
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention relates to a kind of sealing agent, leak stopping slurries and leak-blocking construction method for borehole wall fractures leakage.The sealing agent includes the component of following parts by weight：80~85 parts of cement, 6~10 parts of floating bead, micro- 6~10 parts of silicon, 1~3 part of asbestos fibre.The sealing agent for being used for borehole wall fractures leakage of the present invention, compounded by cement, floating bead, micro- silicon, asbestos fibre and form sealing agent main body, wherein asbestos fibre fracture plays the effect of bridge formation bridging plug, floating bead, micro- silicon fracture play filling plugging action, each component coordinative role makes sealing agent be easily accessible drop ply, bridging plug, bridge formation, the comprehensive function of filling closure are played, the fracture width that is particularly suitable for use in is 5~100m in 3~10mm, leakage speed3Fractured leakage, leak stopping is quick, duty cycle is short, leak stopping success rate is high.
Description
Technical field
The invention belongs to the closure field of drilling well leakage, and in particular to a kind of sealing agent missed for borehole wall fractures,
Leak stopping slurries and leak-blocking construction method.
Background technology
The stratigraphic horizon met and the Geologic Structure Features such as tomography, elevation angle connectedness crack or mud stone crushed zone be present is bored in drilling well
When, due to the window narrows between leakage pressure and strata pressure, if drilling fluid density control is unreasonable, surge pressure is excessive, easily
Drilling well is caused to be missed, or even severe mud losses.Moreover, processing well leakage during, easily induce borehole well instability cave in, blowout, drilling tool
Lock of tool drilling, wellbore conditions are complicated.Drilling well is missed or the cave-in caused by leakage, will have a strong impact on drilling progress,
Extend drilling period, increase shaft building cost.
According to drop ply property, leakage speed and occur leakage the reason for, leakage can be divided into permeability loss, fractured leakage and
Cave leakage.No matter the fractured leakage as caused by geological structure or drilling engineering factor, indulge in geographic area or stratum
To being widely present.The areas such as example domestic Ordos Basin in geographic area, Tahe Oilfield In Xinjiang and suitable north；Such as E Er in distribution of strata
The YAN ' AN FORMATION of this Hangjin Banner block, extension group, Liu family's ditch group, Shi Qian peaks group etc. more, suitable northern segment length about 400m Permian Systems etc.,
Fractured leakage is serious.Application publication number is that CN102443382A patent discloses a kind of sealing agent for being adapted to large-scale leakage,
Include the component of following mass ratio：Clear water：HSD：HD-1：HD-2：LD-102：DF-A：Barite=100：(12~15)：(4~
5)：(7~8)：(4~5)：30；After the technology is mainly used in large-scale leakage using pons hematoma or gel+bridging plug, wastage phase
To smaller, but still can not normally it creep into or cementing effect is not fine, using composite construction cock body leak-stopping technique leak stopping.Change
Yan Zhi, the technology need other leak-stopping techniques to pre-process stratum for large-scale leakage situation.
For 3~10mm of fracture width fractured leakage, the bulky grain material of conventional drilling leak stopping is attached to borehole wall hardly possible
So that into drop ply, barrier layer is destroyed rapidly after boring again；Though little particle loss circulation material can enter stratum, because cementing with stratum
Power and the structural capacity of itself are inadequate, show the characteristics of leak stopping is quick, the leakage cycle is short again.
The content of the invention
It is an object of the invention to provide a kind of sealing agent for borehole wall fractures leakage, so as to solve existing sealing agent
The low problem of leak stopping success rate.
Second object of the present invention is to provide the leak stopping slurries using above-mentioned sealing agent.
Third object of the present invention is the supporting leak-blocking construction method for providing above-mentioned leak stopping slurries.
To achieve the above object, the technical scheme of the sealing agent for being used for borehole wall fractures leakage of the invention is：
A kind of sealing agent for borehole wall fractures leakage, include the component of following parts by weight：
80~85 parts of cement, 6~10 parts of floating bead, micro- 6~10 parts of silicon, 1~3 part of asbestos fibre.
The sealing agent for being used for borehole wall fractures leakage of the present invention, is compounded and is formed by cement, floating bead, micro- silicon, asbestos fibre
Sealing agent main body, wherein asbestos fibre fracture play the effect of bridge formation bridging plug, and floating bead, micro- silicon fracture play filling closure and made
With each component coordinative role makes sealing agent be easily accessible drop ply, plays bridging plug, bridge formation, the comprehensive function of filling closure, especially suitable
For fracture width 3~10mm, leakage speed be 5~100m3Fractured leakage, leak stopping is quick, duty cycle is short, leak stopping into
Power is high.
Auxiliary agent can further be added to optimize the workability of above-mentioned sealing agent and adaptability.Preferably, above-mentioned sealing agent
It is made up of the component of following parts by weight：80~85 parts of cement, 6~10 parts of floating bead, micro- 6~10 parts of silicon, 1~3 part of asbestos fibre, drop
1~2 part of dehydration agent, 0.5~1.5 part of swelling agent, 0.2~0.3 part of retarder, 0.02~0.06 part of polyacrylic acid potassium.
Preferably, the particle diameter of cement is 0.68~63 μm, and the particle diameter of micro- silicon is 0.04~0.68 μm, and the particle diameter of floating bead is
0.063~0.256mm.
Preferably, the length of asbestos fibre is 1~6mm.It is further preferred that asbestos fibre is by 1mm≤length<3mm's
Short asbestos fibre and 3mm≤length≤6mm long asbestos fibre compounding form, short asbestos fibre, the mass ratio of long asbestos fibre
(1.5~2.5):1.Ratio compounding more than short asbestos fibre, long asbestos fibre is stated, can further optimize bridging plug, bridging action, can
To provide more excellent plugging effect.
Further, the sealing agent for being used for borehole wall fractures leakage of the invention, is optimized by further increasing auxiliary agent
The filtrate-loss control of sealing agent, improve flow pattern, be adapted to different drop ply depth, temperature and the change of engineering time；Behavior of Hardened Cement Paste is strong
Spend moderate, reduce and sweep plug difficulty, avoid the formation of " new well "；Behavior of Hardened Cement Paste also has crack arrest toughness reinforcing performance, when preventing from sweeping plug
Behavior of Hardened Cement Paste influences plugging effect because of the broken cracking of stress.
The technical scheme of leak stopping slurries for being used for borehole wall fractures leakage of the present invention is：
A kind of leak stopping slurries using the above-mentioned sealing agent missed for borehole wall fractures, it is made up of water and sealing agent, water
Gray scale is 0.8~0.9.
The leak stopping slurries for being used for borehole wall fractures leakage of the present invention, cement, micro- silicon, floating bead according to certain condition blending,
Maximum dry-blend stacking volume percentage is realized, acquisition density is 1.40~1.45g/cm3Low-density cement mortar, avoid
Leak-stopping cement mortar density is excessive and aggravates leakage degree；Leak stopping slurries have good workability, its pumpable time length, into drop ply after can
Rapid thickening；There is certain thixotropy simultaneously, auxiliary slurry is stranded in crack.
The leak stopping slurries have very brief solidifying, poor flow properties and thixotropic performance characteristics, and increase leak stopping slurry is in drop ply stream
Dynamic resistance；Early strength development is fast, can solidify drop ply rapidly, improves shut-off capacity.
The technical scheme of leak-blocking construction method of the present invention is：
A kind of leak-blocking construction method using above-mentioned leak stopping slurries, comprise the following steps：Be deep under leak stoppage limb leak source with
Upper position, leak stopping slurries are injected, for slurry, pulled out of hole, closing well is pushed, and is waited solidifying.
Preferably, the distance between deep degree and cement plug design block section top=15m+ closing wells are pushed under leak stoppage limb
Preceding static leakage segment length；Wherein, the length of cement plug design block section is not less than 150m；Static leakage segment length=VLoss/S2×
t1, V in formulaLossFor static leakage speed, m after trip-out3/min；S2For Open-Hole Section well sectional area, m2；t1Pushed away to start slip casting to closing well
Engineering time before squeezing, min.
Preferably, the injection rate of leak stopping slurries is cement plug design closure segment length corresponding volume in well, missed between the waiting-on-cement
Amount is with pushing to the 10m on stratum3Three's sum；Wherein, wastage is V between the waiting-on-cementLoss×(T2- t), it is T in formula2During thickening
Between, min；T is the plugging operations whole process engineering time, min.
Preferably, preflush spacer fluid, rearmounted insulating liquid are injected separately into before and after injection leak stopping slurries；It is preflush spacer fluid, rearmounted
Insulating liquid plays a part of separating leak stopping slurry, drilling fluid, and the injection rate of preflush spacer fluid is 2m3, rearmounted flushing liquor injection rate presses
It is designed according to balancing method cementing plug principle.The discharge capacity for injecting leak stopping slurries is 400~700L/min.
For starching, in trip-out process, for slurry to more than balanced surface 100~150m；Discharge capacity for slurry is 500~700L/min.
Rise and be drilled into leak stopping slurries theory and return more than height at least 100m.Turn on pump rinses drilling rod after trip-out, prevents leak stopping slurry to be detained in drilling rod, protects
Card safety；Flushing dose is for drilling rod internal volume corresponding to slurry position to drilling rod bottom segment length.
Preferably, the pushing amount Q that closing well is pushedR=Qt+10-QLoss；Qt=S2×(HLoss-Hd)；QtFor deep position under drilling rod
To annular space volume, m corresponding to target drop ply bottom segment length3；Wherein, S2For Open-Hole Section well sectional area, m2；HLossFor leak source institute
Deep, the m at layer position bottom；HdFor deep under leak stoppage limb, m；QLossThe actual measurement wastage during drilling tool to infusion terminates is starched out for leak stopping,
The level change of tank and recycling can be starched by the drilling fluid of isolation, with reference to cementing truck infusion amount, Actual measurement QLoss。
Plugging operations whole process engineering time t and pumpable time T1Relation：T1=t+ (20~30min).
Wait after coagulating, drilling tool visits plug pressure-bearing, is tested Lou with normally creeping into discharge capacity circulation 20min, record fills in top, plug bottom；If judge
Without leakage, plug is swept using normal drilling discharge capacity.
Further, it can adjust above-mentioned leak-blocking construction method according to leak source or leakage speed change, be specially：
(1) leak source closure or leakage speed are reduced in plugging operations.In this case leak stopping slurries top circle can move up；Drilling rod is short
The principle that theoretical short segment length adds 100m will be followed by playing segment length；Closing well pushing amount should reach leak stopping slurry bottom to drop ply bottom
Hole capacity and entrance stratum 10m3Total amount；
(2) lose and return completely in plugging operations.In this case leak stopping is starched out drilling rod Hou Di circle and moved down, for short after slurry still
State operation so is returned according to complete, drilling rod only rinses drilling tool after in place and do not pushed；
(3) half leakage is partly returned.In this case accurate recording leak stopping starches out drilling tool and misses total amount to infusion ending phase, and drilling rod is short
It is actual to push total amount Q after rising in placeR=S2×(HLoss-Hd)+10-QLoss。
The leak-blocking construction method of the present invention, depth, leak stopping slurries injection rate, closing well pushing amount under leak stoppage limb are carried out carefully
Change, promote most of leak stopping slurries to enter stratum, residue gives over to cement plug on a small quantity；When leak source gets the wrong sow by the ear, push in operation
Secondary Automatic-searching bottom leak source, realizes leak stopping.
The leak-blocking construction method of the present invention, the fracture width that is particularly suitable for use in is in 3-10mm, the fast 5-100m of leakage3/ h Fractured
Leakage.After drilling well leakage occurs, if leakage speed is more than 5m3, without carrying out drop ply pretreatment, directly pull out of hole and change leak stoppage limb, under
To design well depth, injection leak stopping slurry carries out leak stopping；Control can be quantified into the leak stopping slurry amount of drop ply, and avoid leak stopping slurry from squeezing into Lou
Interval velocity is too fast to be caused to suppress logical leakage channel deterioration leakage situation；Leak stopping is quick, duty cycle is short, has a wide range of application, construction
Mechanization degree is high, and program is simple and direct, easy to operate, and loss circulation material cost is low, and environment is caused in the absence of residual leak stopping slurry discharge
Pollution.The technology is applied to the drilling leakage blockage on Ordos Basin fractured leakage stratum, the Hanggin at the Basin of Northern edge
Flag block leak stopping 72 times, a leak stopping success rate are effectively ensured downhole safety, significantly improve drilling efficiency, significantly up to 87.5%
Reduce drilling cost.
Brief description of the drawings
Fig. 1 is the differential percentage of floating bead particle diameter；
Fig. 2 is the cumulative percentage of floating bead particle diameter；
(a) and broken rear (b) mode of appearance before the Behavior of Hardened Cement Paste of Fig. 3 embodiments 1 is broken；
Fig. 4 is deep design diagram under leak stoppage limb in the leak-blocking construction method of embodiment 1；
Fig. 5 is the slip casting schematic diagram in the leak-blocking construction method of embodiment 1；
Fig. 6 is that schematic diagram is cleaned in the trip-out in the leak-blocking construction method of embodiment 1；
Fig. 7 is that the closing well in the leak-blocking construction method of embodiment 1 pushes schematic diagram.
Embodiment
Embodiments of the present invention are described further with reference to embodiment.The key data that following examples are related to
It is with key parameter：
1) layer position bottom depth H where leak sourceLoss, m；
2) design closure well section L, m；
3) the static fast V of leakage after pulling out of holeLoss, m3/min；
4) the actual measurement wastage Q during drilling tool to infusion terminates is starched out in leak stoppingLoss, m3；
5) leak stopping drilling tool inner section product S1, m2；
6) Open-Hole Section well sectional area S2, m2；
7) leak stopping slurry pumpable time T1, min；Thickening time T2, min；
8) plugging operations whole process engineering time t, min；Start engineering time t before slip casting is pushed to closing well1, min；
9) deep H under leak stoppage limbd, m；
10) annular space volume Q corresponding to deep position to target drop ply bottom segment length under drilling rodt, m3；
11) actual pushing amount QR, m3。
Fluid loss agent is G309 oil-well cement filtrate reducers, purchased from Weihui City Chemical Co., Ltd.；Swelling agent is XJP-1 oil
Well cement lattice dilatation agent, purchased from Henan nova building materials Co., Ltd；Retarder is XJH-1 oil well cement retarders, purchased from river
Southern nova building materials Co., Ltd.
Embodiment 1
The sealing agent of the present embodiment, it is made up of the component of following parts by weight：84 parts of G class g cements, 8 parts of floating bead, micro- 8 parts of silicon,
2 parts of asbestos fibre, 1.8 parts of fluid loss agent, 1 part of swelling agent, 0.22 part of retarder, 0.05 part of polyacrylic acid potassium (KPAM)；Cement
Reach 93.8% in the cumulative percentage of 0.68~63 μm of particle size range；Floating bead is power plant's floating bead, in 0.063~0.256mm grains
The cumulative percentage of footpath scope reached for 95.21% (as depicted in figs. 1 and 2)；Micro- silicon is in the tired of 0.04~0.68 μm of particle size range
Meter percentage reaches 97.4%；Asbestos fibre is by 1mm≤length<3mm short asbestos fibre and 3mm≤length≤6mm feldspar
Cotton fiber presses 2:1 mass ratio compounding forms, and two types of fibers is that the different lengths in respective length range do not wait mixture.
Plugging action such as table 1 using the asbestos fibre that short asbestos fibre, long asbestos fibre compound to different in width crack
It is shown.
The fibre length of table 1 is to different in width crack plugging action
| Fracture width | 3.00 | 4.00 | 5.00 | 7.00 | 9.00 | 10.00 |
| Short asbestos fibre | Bridging plug, bridge formation | Bridging plug, bridge formation | Bridging plug | Bridging plug | Bridging plug | --- |
| Long asbestos fibre | ---- | ---- | Build bridge | Bridging plug, bridge formation | Bridging plug, bridge formation | Bridging plug |
The leak stopping slurries of the present embodiment, mixed by the sealing agent and water of the present embodiment, the ratio of mud 0.85.Cement mortar
Shown in the structural representation such as 3 (a) of Behavior of Hardened Cement Paste after liquid solidification, there is preferable compactness extent, the structural representation after crushing
As shown in Fig. 3 (b), there is good crack arrest toughness reinforcing performance, Behavior of Hardened Cement Paste ftractures and shadow because stress crushes when effectively can prevent from sweeping plug
Ring plugging effect.
The blocking construction design of the present embodiment, including herein below：
1) top leakage drilling：For abundant exposure drop ply, avoid repeating leak stopping to same layer position, drilling well is continued with small displacement to bore
Leakage layer；During drilling well, well head observation and measurement liquid level are paid attention to, ensure that underground is stable；
2) tripping in leak stoppage limb (polish drill rod), injection preflush spacer fluid, leak stopping slurries, the leak stopping slurry of rearmounted insulating liquid composition
Post；The composition of preflush spacer fluid is " clear water+5%XJCX-1 ", injection rate 2m3, the injection rate of rearmounted insulating liquid is according to balance
Method cementing plug principle is designed, consisting of " clear water+2%XJG-1 "；Slip casting discharge capacity is 400~700L/min；XJCX-1
It is composite efficient flushing liquor, XJG-1 is a kind of by macromolecule modified cellulose, and it is new that two kinds of additives are purchased from Henan
Star building materials Co., Ltd；
The lower deep degree of leak stoppage limb for cement plug design it is more than block section top with before closing well pushing it is static miss segment length it
With；Static leakage segment length=V before closing well is pushedLoss/S2×t1, lower deep design is as shown in Figure 4；
Cement plug design closure segment length corresponding volume, wastage and pushing between the waiting-on-cement in injection rate=well of leak stopping slurries
To stratum 10m3Three's sum；Design closure segment length is not less than 150m；Wastage=V between waiting-on-cementLoss×(T2-t)；Slip casting
Journey schematic diagram is as shown in Figure 5；
3) it is 500~700L/min for slurry discharge capacity for slurry to more than balanced surface 100~150m；
4) short distance is drilled into leak stopping slurries theory and returns more than height at least 100m, and turn on pump rinses drilling rod, and flushing dose is for slurry position
Put to drilling rod internal volume corresponding to the segment length of drilling rod bottom, its schematic diagram of constructing is as shown in Figure 6；
5) closing well is pushed after short, pushing amount QR=Qt+10-QLoss；Qt=S2×(HLoss-Hd)；QLossSurvey as follows
It is fixed：Two slurry tanks are individually insulated, a tank is used as slurry tank, and a tank is as recycling can；According to two slurry tank Volume Changes before pushing,
With reference to cementing truck infusion amount, calculate leak stopping and starch out the actual wastage that drilling rod to infusion terminates period；Closing well pushes operation signal
Figure is as shown in Figure 7；
Plugging operations whole process engineering time t and pumpable time T1Relation be：T1=t+ (20-30min)；
6) wait to coagulate and be not less than 8h, drilling tool visits plug pressure-bearing, is tested Lou with normally creeping into discharge capacity circulation 20min, record fills in top, plug
Bottom；If judging no leakage, plug is swept using normal drilling discharge capacity.
Above detail design notes low stifled principle using high, is higher than leak source deeply under drilling tool, when leak source gets the wrong sow by the ear, pushes and makees
Secondary Automatic-searching bottom leak source, realizes leak stopping in industry.
It is applied to the JPX-3Y1 wells of Erdos Hangjin Banner block according to above-mentioned detail design, the well is drilled into 2699.6m
When, fractured leakage occurs, leakage speed is examined with small displacement 14L/min, drilling fluid loses and returned.Carried out using above-mentioned leak-blocking construction method
Construction, detailed process are as follows：
1) using little particle, high concentration routine leak stopping slurry 10m3, blocked paragraph by paragraph from shaft bottom, being in the milk and being pumped by well head becomes
Change judges leak source position, and it is Liu family's ditch middle and lower part to determine leak source；Liu family ditch group well depth 2513-2653m；
2) 0 is used:30、1:It is 0m/h that the grouting of 30 two-point methods, which measures static leakage speed,；
3) leak stopping polish drill rod is made up of the common drilling rods of 2136.2m and 348.8m heavy weight drill pipes；2585m is arrived under polish drill rod deeply,
Inject leak-stopping cement mortar 13m3, averag density 1.45g/cm3, for slurry 19.19m3；Leak stopping misses 7.4m after starching out drilling tool3；
4) rise and be drilled into escape pit section 2182m, close ram preventer, push drilling fluid 5.6m3；Plug face is visited after waiting solidifying 8h, is blocked up
Spillage plug top 2593m；Tested Lou within 20 minutes with normally creeping into discharge capacity circulation, no leakage；After sweep plug, sweep plug discharge capacity be 29L/s, sweep plug
Circulation is normal in well afterwards, recovers drilling.
Using the leak-blocking construction method of above-described embodiment in Erdos Hangjin Banner block leak stopping 72 times, leak stopping success
Rate is effectively ensured downhole safety, significantly improves drilling efficiency, drilling cost is greatly reduced up to 87.5%.In conventional blocking method
Compare, the leak-blocking construction method has execute-in-place convenience, the plugging operations time is short, leak stopping is quick, leaks cycle length, leak stopping again
The characteristics of cost is low, it can effectively reduce the various down hole problems induced by long-term leak stopping；The leak-blocking construction method can also have
Effect is used for the cave leakage after the bridge formations such as stone mud ball, long fibre thing are crammed.
Embodiment 2
The sealing agent of the present embodiment, it is made up of the component of following parts by weight：81 parts of G class g cements, 7 parts of floating bead, micro- 10 parts of silicon,
1 part of asbestos fibre, 1 part of fluid loss agent, 0.8 part of swelling agent, 0.2 part of retarder, 0.03 part of polyacrylic acid potassium (KPAM)；Asbestos are fine
Dimension is by 1mm≤length<3mm short asbestos fibre and 3mm≤length≤6mm long asbestos fibre press 1.8:1 mass ratio compounding
Form.
The leak stopping slurries of the present embodiment, mixed by the sealing agent and water of the present embodiment, the ratio of mud 0.82.
Embodiment 3
The sealing agent of the present embodiment, it is made up of the component of following parts by weight：85 parts of G class g cements, 10 parts of floating bead, micro- 7 parts of silicon,
3 parts of asbestos fibre, 2 parts of fluid loss agent, 1.2 parts of swelling agent, 0.28 part of retarder, 0.06 part of polyacrylic acid potassium (KPAM)；Asbestos
Fiber is by 1mm≤length<3mm short asbestos fibre and 3mm≤length≤6mm long asbestos fibre press 2.2:1 mass ratio is answered
With into.
The leak stopping slurries of the present embodiment, mixed by the sealing agent and water of the present embodiment, the ratio of mud 0.88.
Blocking construction is carried out using the leak stopping slurries of embodiment 2 and embodiment 3, technical process refers to embodiment 1, can obtained
Obtain the suitable plugging effect of effect.
Claims (10)
1. a kind of sealing agent for borehole wall fractures leakage, it is characterised in that include the component of following parts by weight：Cement 80~
85 parts, 6~10 parts of floating bead, micro- 6~10 parts of silicon, 1~3 part of asbestos fibre.
2. the sealing agent for borehole wall fractures leakage as claimed in claim 1, it is characterised in that sealing agent is by following weight
The component composition of part：80~85 parts of cement, 6~10 parts of floating bead, micro- 6~10 parts of silicon, 1~3 part of asbestos fibre, fluid loss agent 1~2
Part, 0.5~1.5 part of swelling agent, 0.2~0.3 part of retarder, 0.02~0.06 part of polyacrylic acid potassium.
3. the sealing agent for borehole wall fractures leakage as claimed in claim 1 or 2, it is characterised in that the particle diameter of cement is
0.68~63 μm, the particle diameter of micro- silicon is 0.04~0.68 μm, and the particle diameter of floating bead is 0.063~0.256mm.
4. the sealing agent for borehole wall fractures leakage as claimed in claim 1 or 2, it is characterised in that the length of asbestos fibre
Spend for 1~6mm.
5. as claimed in claim 4 for borehole wall fractures leakage sealing agent, it is characterised in that asbestos fibre by 1mm≤
Length<3mm short asbestos fibre and 3mm≤length≤6mm long asbestos fibre compounding form, and short asbestos fibre, long asbestos are fine
The mass ratio (1.5~2.5) of dimension：1.
6. a kind of leak stopping slurries using the sealing agent missed as claimed in claim 1 or 2 for borehole wall fractures, its feature
It is, is made up of water and the sealing agent, the ratio of mud is 0.8~0.9.
7. a kind of leak-blocking construction method using leak stopping slurries as claimed in claim 6, it is characterised in that including following step
Suddenly：Leak source above position is deep under leak stoppage limb, injects leak stopping slurries, for slurry, is pulled out of hole, closing well is pushed, and is waited solidifying.
8. leak-blocking construction method as claimed in claim 7, it is characterised in that deep degree seals with cement plug design under leak stoppage limb
Static leakage segment length before the distance between stifled section top=15m+ closing wells are pushed；Wherein, cement plug designs the length of block section not
Less than 150m；Static leakage segment length=VLoss/S2×t1, V in formulaLossFor static leakage speed, m after trip-out3/min；S2For Open-Hole Section well
Eye sectional area, m2；t1To start before slip casting is pushed to closing well engineering time, min.
9. leak-blocking construction method as claimed in claim 7 or 8, it is characterised in that the injection rate of leak stopping slurries is cement in well
Plug design closure segment length corresponding volume, wastage and the 10m of pushing to stratum between the waiting-on-cement3Three's sum；Wherein, between the waiting-on-cement
Wastage is VLoss×(T2- t), it is T in formula2Thickening time, min；T is the plugging operations whole process engineering time, min.
10. leak-blocking construction method as claimed in claim 7 or 8, it is characterised in that the pushing amount Q that closing well is pushedR=Qt+10-
QLoss；Qt=S2×(HLoss-Hd)；Wherein, QtFor annular space volume corresponding to deep position under drilling rod to target drop ply bottom segment length,
m3；S2For Open-Hole Section well sectional area, m2；HLossLayer position bottom is deep where leak source, m；HdFor deep under leak stoppage limb, m；QLossIt is stifled
Drilling tool to the infusion that spillage goes out terminates the actual measurement wastage of period, can be become by the drilling fluid of isolation for the liquid level of slurry tank and recycling can
Change, with reference to cementing truck infusion amount, Actual measurement QLoss。
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| CN109021945A (en) * | 2018-08-01 | 2018-12-18 | 西南石油大学 | Bridging materials and preparation method thereof and sealing agent and leakage-stop liquid and its application |
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