CN105623631B - Sealing agent is bridged suitable for the high temperature resistance of deep formation, ultra-deep stratum leakage - Google Patents
Sealing agent is bridged suitable for the high temperature resistance of deep formation, ultra-deep stratum leakage Download PDFInfo
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- CN105623631B CN105623631B CN201610095038.0A CN201610095038A CN105623631B CN 105623631 B CN105623631 B CN 105623631B CN 201610095038 A CN201610095038 A CN 201610095038A CN 105623631 B CN105623631 B CN 105623631B
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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
- C09K8/426—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging
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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
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
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Abstract
The invention discloses the high temperature resistance suitable for deep formation, ultra-deep stratum leakage to bridge sealing agent, the sealing agent is formed by coke and fine glue powder compounding, and 4~100 mesh of coke, content is 70~80 mass %, 80~200 mesh of fine glue powder, content are 20~30 mass %.The alkylphenol polyoxyethylene ether of 0.2 mass % is additionally added, to increase the hydrophily of fine glue powder, improves the dispersiveness in its water-base drilling fluid.It is of the invention compared with traditional bridge joint leakage stopping technology, use the sealing agent of carse, medium and small particle, by build bridge, fill, block formation leakage passage formed densification colmatation zone, drilling fluid is prevented to be lost in, the present invention additionally uses two kinds of novel lost circulation additive for drilling fluid fine glue powders and the compound leak stopping of coke grain.Grain class distribution of the present invention is adjustable, and coke grain is rigidly strong, is compounded with fine glue powder, and rigidity is standby with elasticity, and density is low, suspension is good, and the blocking layer compression strength formed is high, and compactness is good, anti-180 degree high temperature.
Description
Technical field
The present invention relates to drilling fluid in petroleum drilling engineering formation leakage a kind of sealing agent, more particularly to being suitable for
The high temperature resistance bridge joint sealing agent of deep formation, ultra-deep stratum leakage.
Background technology
With the exhaustion of shallow-layer, mid-deep strata petroleum resources, the exploitation of deep-well, ultradeep well becomes the mainstream of oil-gas exploration and development
Technology.The leakage of deep formation, especially lose and return a difficult problem that type severe mud losses are drilling engineerings.Deep layer severe mud losses lead to
Road is generally the wider crack of aperture, and the conventional blocking method of use is mostly to bridge leakage stopping technology.The technology is to utilize various shapes
After the bridge joint sealing agent of shape and particle diameter enters drop ply, fine and close blocking layer is formed by bridge formation-filling-closure, blocks drilling fluid leakage
Lose passage.Coarse granule therein plays bridge formation and supporting role in leakage channel, and middle particle plays filling effect, and fine grained plays closure
Effect.Bridge joint leak stopping will successfully be known as at 3 points, first, blocking agent will can enter crack, the second is crack of the blocking agent near the borehole wall
It is middle to be resident, the third is the colmatation zone formed in crack has sufficient intensity, certain pressure difference can be born.Wherein bridge formation particle is blocking layer
Skeleton and basis, to have rigidity and intensity, and particle diameter matches with drop ply aperture, this is that leak stopping is successfully basic.Bridge formation
Grain slightly into not crack, forms false blocking, after drill bit scratches the blocking layer of borehole wall surface, leakage occurs again in fracture faces excessively.
Crossing detailed rules and regulations can not build bridge in crack, it is impossible to form colmatation zone.Used two class plugging material of bridge joint leakage stopping technology generally use,
When plant particle and fiber, such as walnut shell, cotton seed hull, stalk fibre, sawdust, second, mineral substance particle and fiber, such as
The limestone particle of different-grain diameter, modified asbestos etc..Plant material density is low, intensity is weak, temperature resistance energy force difference, is easily sent out under high temperature
Ferment, the blocking layer bearing capacity of formation is low, and easily multiple leakage, application range is limited by well temperature.Limestone material intensity is high, but density is big
(2.7g/cm3), suspension stability is poor, and granular limestone easily sinks to tank bottom in drilling fluid, it is impossible to effectively enters well, influences
Plugging effect.And asbestos material toxicity is larger, there is strong carcinogenicity.In addition flexible packing material is lacked between limestone particle,
Blocking layer compactness deficiency, is easily influenced by head of liquid excitement and is leaked again.
In view of the deficiency of existing bridge joint leakage stopping technology, research and development are a kind of to be suitable for deep formation, ultra-deep stratum leakage
High temperature resistance bridges leakage stopping technology, it has also become the emphasis that drilling fluid is paid close attention in the industry.
The content of the invention
It is an object of the invention to provide the high temperature resistance suitable for deep formation, ultra-deep stratum leakage to bridge sealing agent, adopts
With two kinds of novel lost circulation additive for drilling fluid fine glue powders and the compound preparation of coke grain, plant material is used with traditional bridge joint leakage stopping technology
Compared with the inorganic material based on lime stone, its grain class distribution is adjustable, and coke grain is rigidly strong, with fine glue powder compound, rigidity with
Elasticity is standby, and density is low, suspension is good, and the blocking layer compression strength formed is high, and compactness is good, anti-180 degree high temperature.
To reach above technical purpose, the present invention provides following technical scheme.
It is of the invention compared with traditional bridge joint leakage stopping technology, common ground be use carse, medium and small particle sealing agent, lead to
Cross bridge formation, filling, block the colmatation zone that densification is formed in formation leakage passage, prevent drilling fluid from being lost in, its difference is to use
Two kinds of novel lost circulation additive for drilling fluid fine glue powders and coke grain compound leak stopping.
Rigid bridge formation particle and filler particles of the coke of present invention selection different-grain diameter as bridge joint sealing agent, select essence
Thin closure particle of the rubber powder as sealing agent.A set of high temperature resistance bridge joint leakage stopping technology is formd, solves current bridge joint leak stopping skill
Temperature resistance scarce capacity, bearing capacity existing for art be low, the problems such as easily leaking again.Coke density is 1.74~1.82g/cm3, in drilling well
Suspension is good in liquid, and chemical inertness is good, does not influence property of drilling fluid, high temperature resistance, and compression strength height, and source is wide, technique is simple,
Particle diameter can be obtained by mechanical crushing and screening to meet the requirements particle.Displaing micro picture shows that coke granule rough surface, corner angle divide
Bright, wall built-up is good in crack.Fine glue powder is that waste rubber goods are processed and manufactured fine particle materials (80 through deep cooling crush
~200 mesh), it is a kind of excellent filler particles, there is anti-180 degree high temperature, elastically deformable.Under differential pressure action,
Rubber powder granule is squeezed into the blocking layer hole of coke granule formation, forms the blocking layer that one layer of rubber powder granule is interacted with coke granule.
The elasticity combination of the rigidity of this coke granule and rubber powder granule, has that blocking layer compactness is good, bearing capacity is strong, is not easy multiple leakage,
The characteristics of leak stopping success rate is high, suitable for the blocking construction of fractured leakage under deep layer, ultra-deep stratum hot conditions.
Sealing agent is bridged suitable for the high temperature resistance of deep formation, ultra-deep stratum leakage, the sealing agent is by coke and finely
Rubber powder compounding forms, 4~100 mesh of coke, and content is 70~80 mass %, 80~200 mesh of fine glue powder, and content is
20~30 mass %.
The high temperature resistance bridges sealing agent, the alkylphenol polyoxyethylene ether OP-10 of 0.2 mass % is additionally added, to increase essence
The hydrophily of thin rubber powder, improves the dispersiveness in its water-base drilling fluid.
High temperature resistance bridge joint sealing agent preferably constitute for：The coarse grain coke of 6~10 mesh, 25 mass %, 10~40 mesh, 30
The middle grain coke of quality %, 40~100 mesh, the shot coke of 25 mass %, 120 mesh, the fine glue powder of 20 mass %, are used for
The drop ply of 3mm seams, leakage speed is 30~50m3/ h, the dosage of sealing agent is 12 mass %.
High temperature resistance bridge joint sealing agent another kind preferably constitute for：The coarse grain coke of 4~10 mesh, 30 mass %, 10~
The middle grain coke of 40 mesh, 25 mass %, 40~100 mesh, the shot coke of 25 mass %, 120 mesh, the fine glue of 20 mass %
Powder, for the drop ply of 4mm seams, leakage speed is 50~80m3/ h, the dosage of sealing agent is 15 mass %.
High temperature resistance bridge joint sealing agent also have one kind to preferably constitute for：The coarse grain coke of 4~10 mesh, 35 mass %, 10
The middle grain coke of~40 mesh, 25 mass %, 40~100 mesh, the shot coke of 20 mass %, 120 mesh, the fine glue of 20 mass %
Type severe mud losses are returned in powder, the mistake for the drop ply of 5mm seams, and leakage speed is >=80m3/ h, the dosage of sealing agent is 18 mass %.
Starched with the leak stopping that high temperature resistance of the present invention bridge joint sealing agent is prepared, its composition is as follows：Bentonite slurry+0.3
The fine glue powder (80~200 of+1.5~3.0 mass % of coke grain (4~100 mesh) of+6~12 mass % of quality % tackifier
Mesh).Leak stopping slurry can block in the crack that slit width is 1mm~5mm completely, its technical indicator is：The instantaneous wastages of 1.0MPa≤
150ml, bearing capacity >=6MPa, add up wastage≤250ml (10min, according to the 1.0MPa/min rates of rise, by pressure from
1.0MPa increases to voltage stabilizing 5min under 6MPa used times 5min, 6MPa).
Compared with 150 degree of prior art plant bridge joint sealing agent temperature resistance, temperature resistance ability of the present invention brings up to 180 degree.With
Lime stone rigidity leakage stopping technology is compared, and coke granule density and common drilling fluid density of the present invention are closer, and suspension is more preferable, burnt
Charcoal with fine glue powder is compound makes blocking layer finer and close, intensity, toughness higher, bearing capacity is stronger, and plugging effect is more preferable, suitable for depth
The blocking construction of fractured leakage under layer, ultra-deep stratum hot conditions.
Embodiment
The present invention is further illustrated below according to embodiment.
Preferably constituting for high temperature resistance bridge joint sealing agent is as follows：
The plugging effect of above-mentioned high temperature resistance bridge joint sealing agent is evaluated using QD-2 type plugging material experimental rigs, according to
It is secondary to comprise the following steps：
(1) the preparation of bentonite slurry：Measure 1000ml tap water pour into the drilling fluid cup of 2000ml capacity, 1500 turns/
Under minute stirring condition, soda ash 2g and bentonite 50g are slowly added to, continues stirring after ten minutes, 10000 under high speed agitator
Rev/min shear agitation 2 minutes, stand aquation 16 it is small when more than.
(2) the preparation of leak stopping slurry：With above-mentioned bentonite slurry 1000ml, slowly uniformly add under 1500 turns/min stirring conditions
Enter 0.3% polymeric viscosifiers, continue to stir 10min, it is compound stifled to be then slowly homogeneously added into 12%~18% coke-rubber powder
Agent is leaked, continues to stir 10min, carries out leaking stoppage experiment.
(3) leaking stoppage experiment：
Simulation seam plate is connected to the ball valve joint position of plugging test device, and closes ball valve；Leak stopping is starched along mud
Pour into sludge barrel, 3000ml tap water is covered on leak stopping slurry；Top cover is connected with air inlet valve lever, and logical nitrogen simultaneously adjusts pressure
Power is 1.0MPa, opens ball valve, immediate record time and instantaneous wastage；Then pressure is improved with the speed of 1.0MPa/min,
And observe and record 2,3,4,5, the accumulative wastage of 6MPa, after pressure to 6MPa, voltage stabilizing 5 minutes, and record leakage total amount.
Plugging effect evaluation index：
1. instantaneous wastage ＜ 150ml, total wastage ＜ 250ml, plugging effect are good；
2. instantaneous wastage ＞ 200ml, total wastage ＞ 500ml, leak stopping are invalid；
It is that blocking layer is breakdown 3. bearing capacity >=6MPa, in boost process, such as runs into the amplification of wastage moment, pressure-bearing
Ability refers to the breakdown preceding maximum pressure of blocking layer.
1 3mm of embodiment stitches plate plugging test
With I type sealing agent, leak stopping slurry is prepared according to abovementioned steps, 3mm is installed on QD-2 type plugging material experimental rigs
Plate is stitched, carries out plugging test, examines plugging effect of the I type sealing agent to 3mm simulation fractures.
It can be seen that from upper table, after instantaneous leakage 120ml, blocking layer is formed, 10min total wastage only 165ml, blocking layer compactness
It is good, at least can pressure-bearing 6MPa.
2 sealing agent model of embodiment and the matching leaking stoppage experiment of seam plate
Leaking stoppage experiment is carried out with the sealing agent and 5mm seam plates of different model respectively, evaluates sealing agent model (bridge formation particle
Degree) influence to plugging effect.
Upper table data show that bridge formation grain graininess has a direct impact plugging effect, and when granularity is too low, sealing agent is being split
It can not build bridge in seam, it is impossible to form blocking layer, leak stopping slurry total loss.Grain diameter of such as building bridge is reasonable, but when concentration is relatively low, even if shape
Into blocking layer, bearing capacity is also inadequate, and blocking layer is breakdown under the effect of 4.5MPa pressure, leak stopping failure.Only build bridge grain diameter
Matched with crack, size particles grading is suitable, and when concentration is enough, and the blocking layer compactness of formation is good, bearing capacity is high, leak stopping effect
Fruit is good.
Claims (5)
1. suitable for deep formation, the high temperature resistance bridge joint sealing agent of ultra-deep stratum leakage, the sealing agent is by coke and fine glue
Powder compounding forms, and sealing agent composition is：The coarse grain coke of 6~10 mesh, 25 mass %, 10~40 mesh, the middle grain of 30 mass %
Coke, 40~100 mesh, the shot coke of 25 mass %, 120 mesh, the fine glue powder of 20 mass %, the drop ply for 3mm seams.
2. suitable for deep formation, the high temperature resistance bridge joint sealing agent of ultra-deep stratum leakage, the sealing agent is by coke and fine glue
Powder compounding forms, and sealing agent composition is：The coarse grain coke of 4~10 mesh, 30 mass %, 10~40 mesh, the middle grain of 25 mass %
Coke, 40~100 mesh, the shot coke of 25 mass %, 120 mesh, the fine glue powder of 20 mass %, the drop ply for 4mm seams.
3. suitable for deep formation, the high temperature resistance bridge joint sealing agent of ultra-deep stratum leakage, the sealing agent is by coke and fine glue
Powder compounding forms, and sealing agent composition is：The coarse grain coke of 4~10 mesh, 35 mass %, 10~40 mesh, the middle grain of 25 mass %
Coke, 40~100 mesh, the shot coke of 20 mass %, 120 mesh, the fine glue powder of 20 mass %, for the 5mm drop plies stitched
Type severe mud losses are returned in mistake.
4. it is suitable for deep formation, the high temperature resistance bridge joint sealing agent of ultra-deep stratum leakage as described in claim 1,2 or 3, its
It is characterized in that, is additionally added the alkylphenol polyoxyethylene ether of 0.2 mass %, increases the hydrophily of fine glue powder.
5. it is suitable for deep formation, the high temperature resistance bridge joint sealing agent of ultra-deep stratum leakage as described in claim 1,2 or 3, its
It is characterized in that, the leak stopping prepared with the sealing agent is starched, its composition is as follows：The tackifier+6 of the quality of bentonite slurry+0.3 %~
The fine glue powder of+1.5~3.0 mass % of coke grain of 12 mass %, leak stopping slurry are used for the crack that slit width is 1mm~5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610095038.0A CN105623631B (en) | 2016-02-20 | 2016-02-20 | Sealing agent is bridged suitable for the high temperature resistance of deep formation, ultra-deep stratum leakage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610095038.0A CN105623631B (en) | 2016-02-20 | 2016-02-20 | Sealing agent is bridged suitable for the high temperature resistance of deep formation, ultra-deep stratum leakage |
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| Publication Number | Publication Date |
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| CN105623631A CN105623631A (en) | 2016-06-01 |
| CN105623631B true CN105623631B (en) | 2018-05-04 |
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| CN201610095038.0A Expired - Fee Related CN105623631B (en) | 2016-02-20 | 2016-02-20 | Sealing agent is bridged suitable for the high temperature resistance of deep formation, ultra-deep stratum leakage |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4957174A (en) * | 1989-06-29 | 1990-09-18 | Conoco Inc. | Method of controlling lost circulation in well drilling |
| US5826669A (en) * | 1995-12-15 | 1998-10-27 | Superior Graphite Co. | Drilling fluid loss prevention and lubrication additive |
| US8043997B2 (en) * | 2008-02-29 | 2011-10-25 | Halliburton Energy Services Inc. | Lost circulation material formulation and method of use |
-
2016
- 2016-02-20 CN CN201610095038.0A patent/CN105623631B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4957174A (en) * | 1989-06-29 | 1990-09-18 | Conoco Inc. | Method of controlling lost circulation in well drilling |
| US5826669A (en) * | 1995-12-15 | 1998-10-27 | Superior Graphite Co. | Drilling fluid loss prevention and lubrication additive |
| US8043997B2 (en) * | 2008-02-29 | 2011-10-25 | Halliburton Energy Services Inc. | Lost circulation material formulation and method of use |
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| CN105623631A (en) | 2016-06-01 |
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