CN107748248A - Anti-pressure glass fibre vermiculite prepares the well cementation test block performance test of oil well water-impervious - Google Patents
Anti-pressure glass fibre vermiculite prepares the well cementation test block performance test of oil well water-impervious Download PDFInfo
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- CN107748248A CN107748248A CN201711167569.7A CN201711167569A CN107748248A CN 107748248 A CN107748248 A CN 107748248A CN 201711167569 A CN201711167569 A CN 201711167569A CN 107748248 A CN107748248 A CN 107748248A
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- 238000012360 testing method Methods 0.000 title claims abstract description 84
- 239000003129 oil well Substances 0.000 title claims abstract description 24
- 239000010455 vermiculite Substances 0.000 title claims abstract description 21
- 229910052902 vermiculite Inorganic materials 0.000 title claims abstract description 21
- 235000019354 vermiculite Nutrition 0.000 title claims abstract description 21
- 239000003365 glass fiber Substances 0.000 title claims abstract description 18
- 238000011056 performance test Methods 0.000 title claims abstract description 12
- 239000002002 slurry Substances 0.000 claims abstract description 61
- 150000001875 compounds Chemical class 0.000 claims abstract description 25
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000011148 porous material Substances 0.000 claims abstract description 17
- 239000004568 cement Substances 0.000 claims abstract description 14
- 239000002245 particle Substances 0.000 claims abstract description 13
- 239000000919 ceramic Substances 0.000 claims abstract description 10
- 239000004088 foaming agent Substances 0.000 claims abstract description 9
- 239000004005 microsphere Substances 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 9
- 239000011347 resin Substances 0.000 claims abstract description 9
- 229920005989 resin Polymers 0.000 claims abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000010439 graphite Substances 0.000 claims abstract description 8
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 8
- 239000011325 microbead Substances 0.000 claims abstract description 8
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 8
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000292 calcium oxide Substances 0.000 claims abstract description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000005070 sampling Methods 0.000 claims abstract description 7
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 6
- 235000013312 flour Nutrition 0.000 claims abstract description 6
- 239000010881 fly ash Substances 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000002360 preparation method Methods 0.000 claims description 13
- 238000002474 experimental method Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 230000018044 dehydration Effects 0.000 claims description 9
- 238000006297 dehydration reaction Methods 0.000 claims description 9
- 230000002708 enhancing effect Effects 0.000 claims description 9
- 239000011440 grout Substances 0.000 claims description 9
- 239000011521 glass Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 230000035939 shock Effects 0.000 claims description 6
- 239000008187 granular material Substances 0.000 claims description 5
- 238000006703 hydration reaction Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 4
- 238000005213 imbibition Methods 0.000 claims description 4
- 239000002956 ash Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 230000007480 spreading Effects 0.000 claims description 3
- 238000003892 spreading Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 239000011324 bead Substances 0.000 claims 1
- 235000013339 cereals Nutrition 0.000 claims 1
- 230000035699 permeability Effects 0.000 description 9
- 230000008859 change Effects 0.000 description 8
- 239000004411 aluminium Substances 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 239000011083 cement mortar Substances 0.000 description 7
- 239000000499 gel Substances 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 235000012241 calcium silicate Nutrition 0.000 description 5
- 238000007711 solidification Methods 0.000 description 5
- 230000008023 solidification Effects 0.000 description 5
- 239000000378 calcium silicate Substances 0.000 description 3
- 229910052918 calcium silicate Inorganic materials 0.000 description 3
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 3
- 239000006071 cream Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- 241000545744 Hirudinea Species 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- PPQREHKVAOVYBT-UHFFFAOYSA-H aluminium carbonate Inorganic materials [Al+3].[Al+3].[O-]C([O-])=O.[O-]C([O-])=O.[O-]C([O-])=O PPQREHKVAOVYBT-UHFFFAOYSA-H 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Immunology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention provides a kind of Anti-pressure glass fibre vermiculite and prepares the well cementation test block performance test of oil well water-impervious, comprises the following steps：The dispensing of water-impervious well cementation test block：By 40~50wt% of G level oil-well cements, 10~15wt% of superfine cement, particle diameter is 50~200 μm of 25~35wt% of vermiculite closed pore hollow ceramic microspheres, 5~7wt% of flyash of loss on ignition 1.1%, 1.5~the 2wt% of calcium oxide of purity 99.9%, 0.5~1.0wt% of sodium sulphate, 1~5wt% of silica flour and 1.0~2wt% of alumina powder samplings, obtain compound, the percentage by weight sum of above component is 100%, the ratio of mud that obtained compound is equipped with to 0.5~0.7 is sized mixing slurries is made, add the foaming agent that compound gross weight is 0.2~0.5%, glass fibre is proportionally added into again, graphite microbeads and swollen resin, stir, carry out water-impervious performance test.
Description
Technical field
The present invention relates to Anti-pressure glass fibre vermiculite to prepare the well cementation test block performance test of oil well water-impervious, belongs to material skill
Art is led.
Background technology
At present, both at home and abroad in oil well cementing, cement mortar is used for HTHP oil well, but uses fly ash float,
Compression strength is low, and cement slurry density rate of change is big, and after the static solidification of cement mortar, appearance drop dehydration is excessive, test block shrinkage ratio mistake
Greatly, in addition, the poor toughness of test block, tension, resistance to compression, anti-impact force are poor, dehydration is largely dropped, causes blind hole.
The content of the invention
Using vermiculite material as palliative, add silica flour and alumina powder, improve the resistance to compression of well cementation test block, resistance to compression,
High temperature resistant, corrosion resistant performance, add foaming agent in cement mortar, form the slurries of expansion, reduce the density of slurries, reduce
The pressure in shaft bottom, the slurries added in glass fibre, test block toughness, resistance to compression increase after grout cures, add graphite microbeads and
The swollen resin of water imbibition, increases the mobility of slurries, and the test block shock resistance enhancing after grout cures, swollen resin water suction reduces
Test block drop dehydration quantity, generates spawn, the basal body structure hole of cement mortar diminishes, and forms high gas in hydration process
Resistance well cementation test block, the permeability of well cementation test block is reduced, improve the flow of pore resistance of well cementation test block.
Its technical scheme is：
Anti-pressure glass fibre vermiculite prepares the well cementation test block performance test of oil well water-impervious, comprises the following steps：
The first step：The preparation of vermiculite closed pore hollow ceramic microspheres：Vermiculite is first broken into 1000~1500 μm by jaw crusher
Little particle, then 20~100 μm of spherical granules are made by Raymond mill, spherical granules enter distributing device by elevator,
Entered again by distributing device in expansion sintering furnace, fired by 800~950 DEG C of expansions, 1000~1500 DEG C of melt surfaces, cooling, warp
Pneumatic separating forms 50~100 μm of wall thickness, the vermiculite closed pore hollow ceramic microspheres of 50~200 μm of particle diameter.
Second step, the dispensing of water-impervious well cementation test block：By 40~50wt% of G level oil-well cements, 10~15wt% of superfine cement,
Particle diameter is 50~200 μm of 25~35wt% of vermiculite closed pore hollow ceramic microspheres, 5~7wt% of flyash of loss on ignition 1.1%, purity
99.9% 1.5~2wt% of calcium oxide, 0.5~1.0wt% of sodium sulphate, the sampling of silica flour 1~5wt% and 1.0~2wt% alumina powder, are obtained
To compound, the percentage by weight sum of above component is 100%, and activated silica, aluminium and G level oil-well cements, which react, generates water
Change calcium silicates spawn and other gels, the basal body structure hole of cement mortar diminish, form high vapour lock well cementation test block, reduce
The permeability of well cementation test block, the flow of pore resistance of well cementation test block is improved, improves test block heat resistance, calcium oxide aquation is anti-
Substantial amounts of heat should be discharged, improves the temperature of test block, silica flour and alumina powder G level oil-well cements, which react, generates hydrated calcium silicate
Spawn and other gels, the basal body structure hole of cement mortar diminish, and form high vapour lock well cementation test block, reduce well cementation examination
The permeability of block, the flow of pore resistance of well cementation test block is improved, strengthen test block compressive resistance；
The preparation of 3rd step, water-impervious well cementation test block toughness reinforcing resistance to compression slurries：It is mixed to get by the percentage by weight sampling of second step
Compound, compound is stirred, sized mixing with 0.5~0.7 ratio of mud, wherein ash is compound, it is total to add compound
Weight is 0.2~0.5% foaming agent, and foaming agent is one kind therein in aluminium powder cream, the compound of aluminium or ammonium hydrogen carbonate,
Foaming agent hydration reaction generation bubble is added, forms the slurries of expansion, reduces the density of slurries, forms high vapour lock well cementation test block,
The permeability of well cementation test block is reduced, improves the flow of pore resistance of well cementation test block, with the increase of well cementation depth, high density
Slurries, the bottom of test block pressure increase, easily cause oil well cementing test block weightlessness collapse, section fault rupture, cause oil well infiltration,
Landslide, the glass fibre that compound gross weight is 5~8% will be added in the slurries of preparation, by roller rotary spreading, realized equal
Even stirring, adds the slurries of glass fibre, test block test block high mechanical strength, crushing resistance enhancing after grout cures；
4th step, water-impervious well cementation test block shock resistance slurries preparation, will the 3rd step prepare slurries in add after nodularization
Particle diameter is 20~50 μm of graphite microbeads, and addition is 1~3% graphite microbeads of second step compound weight, then adds the
The swollen resin of 0.5~1.0% water imbibition of two step compound weight, stirs, increases the mobility of slurries, grout cures
Test block shock resistance, toughness enhancing afterwards, the shrinkage factor of swollen resin water suction test block is low, reduces test block drop dehydration quantity, slurries
Density in 0.8~1.2g/cm3；
5th step, testing performance index：
A, the measure of expansion slurry flow rate：Take the 4th step to prepare slurries, pour into slurries flowing speedometer, observe and record slurry
The distance of motion in the flow rate of liquid, i.e. unit interval；
B, the volume density rate of change experiment of test block：4th step is prepared into slurries, pours into one group of three pieces of length and width, high respectively 53mm*
In 53mm*53mm die trials, conserved respectively 24 hours, 48 hours, 96 hours, after the demoulding in the water-bath curing box of 52 DEG C of constant temperature
Soaked 1 hour in cold water, the test block after solidification is put into the volume density rate of change experiment that test block is carried out on forcing press, test block
Volume density rate of change is less than 0.02%, and the porosity of test block is low, and permeability is poor；
C, the bleed experiment of test block：The slurries prepared are poured into die trial, die trial is suspended among beaker, beaker mouth hermetic bag
Sealing, slurries take out die trial after test block is frozen into from beaker, weigh the weight that moisture is separated out in beaker, observe slurry
Condition, if layering, i.e., homogeneity, the test block vertical section Density Distribution after solidification are uniform；
D, water-impervious performance test：The slurries for taking the 4th step to prepare are poured into water-impervious analogue experiment installation, and antiseepage Fluid Dynamics are real
Experiment device includes base, central tube, outer tube, top cover labyrinth, lower sealing cover, well-illuminated glass, special high-pressure pressurized equipment, in
Heart pipe runs through outer tube, and center pipe diameter has a plurality of specifications, and between 10~200 centimetres of internal diameter, ring is formed between central tube and outer tube
Sky, by the slurries injection of expansion wherein, central tube and outer tube are respectively equipped with micropore, and screen pack, top cover labyrinth are provided with outer tube
With lower sealing cover by central tube and the outer seal of tube, special high-pressure pressurized equipment is made up of high-pressure pump, pressurized tank and button, according to need
Simulation oil well depth is wanted, sets the value of digital pressure gauge, from the pressurization of pressurization hole, pressurization scope opens switch from 10~350MPa
Button, gases at high pressure enter central tube interior sealing intracavitary through piping, when reaching the value of digital pressure gauge setting, constant pressure 30 minutes
Afterwards, the quantity that dehydration is oozed in bottom in well-illuminated glass is observed, the scope of fluid loss is dropped in 10~50mL/30min, drops dehydration
Quantity is to weigh the most important performance indications of water-impervious.
The main component of vermiculite is silica, aluminum oxide, iron oxide and magnesia, calcium oxide hydration reaction, is produced a large amount of
Heat, generation calcium hydroxide is in as a form of gel, and silica, aluminum oxide generation calcium silicates, and calcium oxide is activator, excited cement
Activity, flyash is strong water absorbent, by high temperature sintering, there is higher activity, adds the slurries of glass fibre, grout cures
Test block high mechanical strength afterwards, crushing resistance enhancing；
The present invention has advantages below.
1st, using the slurries of expansion, the density of slurries is reduced, so as to reduce the pressure in shaft bottom.
2nd, glass fibre has that heat resistance is strong, corrosion resistance is good, high mechanical strength, after adding the grout cures of glass fibre
The enhancing of test block crushing resistance, toughness increase, resistance to compression, pull resistance enhancing.
3rd, activated silica, aluminium and G level oil-well cements, which react, generates hydrated calcium silicate gel shape material and other gels, water
The basal body structure hole of mud diminishes, and forms high vapour lock well cementation test block, reduces the permeability of well cementation test block, improves well cementation examination
The flow of pore resistance of block.
Brief description of the drawings
Fig. 1 is the test platform structure schematic diagram of the water-impervious performance test of the embodiment of the present invention.
1, base 2 wherein in figure, lower sealing cover 3, well-illuminated glass 4, screen pack 5, outer tube 6, central tube 7,
Digital pressure gauge 8, top cover labyrinth 9, pressurized tank.
Embodiment
Embodiment 1.
Anti-pressure glass fibre vermiculite prepares the well cementation test block performance test of oil well water-impervious, comprises the following steps：
The first step：The preparation of vermiculite closed pore hollow ceramic microspheres：Vermiculite is first broken into 1000 μm small by jaw crusher
Particle, then 50 μm of spherical granules are made by Raymond mill, spherical granules enter distributing device by elevator, then by distributing device
Into in expansion furnace, fired by 800 DEG C of expansions, 1200 DEG C of melt surfaces, cooling, form 80 μm of wall thickness, the leech of 150 μm of particle diameter
Stone closed pore hollow ceramic microspheres.
Second step, the dispensing of water-impervious well cementation test block：It is by G level oil-well cements 40wt%, superfine cement 15wt%, particle diameter
150 μm of vermiculite closed pore hollow ceramic microspheres 28wt%, the flyash 7wt% of loss on ignition 1.1%, the calcium oxide 2wt% of purity 99.9%, sulphur
Sour sodium 1.0wt%, silica flour 5wt% and alumina powder 2wt% samplings, obtain compound, the percentage by weight sum of above component is
100%, activated silica, aluminium and G level oil-well cements, which react, generates hydrated calcium silicate gel shape material and other gels, cement mortar
Basal body structure hole diminish, form the well cementation test block of high vapour lock, reduce the permeability of well cementation test block, improve well cementation test block
Flow of pore resistance, improve test block heat resistance；
The preparation of 3rd step, water-impervious well cementation test block dilatant slurry：Mixing is mixed to get by the percentage by weight sampling of second step
Material, compound is stirred, sized mixing with 0.5 ratio of mud, wherein ash is compound, adds compound gross weight as 0.2%
Foaming agent, foaming agent is aluminium powder cream, adds hydration reaction generation bubble after aluminium powder cream, forms the slurries of expansion, reduce slurries
Density, form the well cementation test block of high vapour lock, reduce the permeability of well cementation test block, improve the flow of pore resistance of well cementation test block
Power, with well cementation depth increase, the bottom of test block pressure increase, easily cause oil well cementing test block weightlessness collapse, cross-sectional layers
Fracture, cause oil well infiltration, landslide；The preparation of water-impervious well cementation test block resistance to compression slurries：Compound will be added in the slurries of preparation
Gross weight is 8% glass fibre, by roller rotary spreading, realizes uniform stirring, adds the slurries of glass fibre, slurries coagulate
Test block high mechanical strength, crushing resistance enhancing after Gu；
4th step, water-impervious well cementation test block mobility slurries preparation, will the 3rd step prepare slurries in add after nodularization
Particle diameter is 25 μm of graphite solid microbeads, and addition is 2% graphite solid microbeads of second step compound weight, adds second
The swollen resin of 1.0% water imbibition of compound weight is walked, is stirred, increases the mobility of slurries, the test block after grout cures
Shock resistance strengthens, and swollen resin water suction reduces test block drop dehydration quantity, and the density of slurries is in 1.0g/cm3；
5th step, testing performance index：
A, the measure of expansion slurry flow rate：Take the 4th step to prepare slurries, pour into slurries flowing speedometer, observe and record slurry
The flow rate of liquid, the distance of motion in the unit interval；
B, the volume density rate of change experiment of test block：4th step is prepared into slurries, pours into one group of three pieces of length and width, high respectively 53mm*
In 53mm*53mm die trials, conserved respectively 24 hours, 48 hours, 96 hours, after the demoulding in the water-bath curing box of 52 DEG C of constant temperature
Soaked 1 hour in cold water, the test block after solidification is put into the volume density rate of change experiment that test block is carried out on forcing press, test block
Volume density rate of change is less than 0.02%, and the porosity of test block is low, and permeability is poor；
C, the bleed experiment of test block：The slurries prepared are poured into die trial, die trial is suspended among beaker, beaker mouth hermetic bag
Sealing, slurries take out die trial after test block is frozen into from beaker, weigh the weight that moisture is separated out in beaker, and slurries are not stratified,
Test block vertical section Density Distribution after solidification is uniform, i.e. homogeneity；
D, water-impervious performance test：The slurries for taking the 4th step to prepare are poured into water-impervious analogue experiment installation, and antiseepage Fluid Dynamics are real
Experiment device includes base 1, central tube 6, outer tube 5, top cover labyrinth 8, lower sealing cover 2, well-illuminated glass 3, special high-pressure pressurization
Equipment, central tube 6 run through outer tube 5, and the diameter of central tube 6 has plurality of specifications, 50 centimetres of internal diameter, formed between central tube 6 and outer tube 5
Annular space, the slurries of expansion being injected into annular space, central tube 6 and outer tube 5 are respectively equipped with micropore, screen pack 4 are provided with outer tube 5, on
Closure 8 and lower sealing cover 2 seal central tube 6 and outer tube 5, and special high-pressure pressurized equipment is by high-pressure pump, pressurized tank 9 and button
Composition, simulation oil well depth as needed, the value of digital pressure gauge 7 is adjusted, from the pressurization of pressurization hole, pressurizeed 200MPa, and opening is opened
Button is closed, gases at high pressure enter the interior sealing intracavitary of central tube 6 through piping, observed after 30 minutes in well-illuminated glass 3 and ooze mistake
The quantity of water, fluid loss scope is in 20mL/30min.
Claims (1)
1. Anti-pressure glass fibre vermiculite prepares the well cementation test block performance test of oil well water-impervious, comprise the following steps：
The first step, the dispensing of water-impervious well cementation test block：By 40~50wt% of G level oil-well cements, 10~15wt% of superfine cement, particle diameter
For 50~200 μm of 25~35wt% of vermiculite closed pore hollow ceramic microspheres, 5~7wt% of flyash of loss on ignition 1.1%, purity 99.9%
1.5~2wt% of calcium oxide, 0.5~1.0wt% of sodium sulphate, 1~5wt% of silica flour and 1.0~2wt% of alumina powder samplings, are mixed
Material, the percentage by weight sum of above component is 100%, the preparation of vermiculite closed pore hollow ceramic microspheres：First vermiculite is broken by jaw
20~100 μm of spherical granules, spheroidal is made into 1000~1500 μm of little particle, then by Raymond mill in broken crusher machine
Grain enters distributing device by elevator, then is entered by distributing device in expansion sintering furnace, 1000 are expanded by 800~950 DEG C~
1500 DEG C of melt surfaces are fired, cooling, and the vermiculite closed pore sky of 50~100 μm of wall thickness, 50~200 μm of particle diameter is formed through pneumatic separating
Heart ceramic fine bead；
The preparation of second step, water-impervious well cementation test block dilatant slurry：Mixing is mixed to get by the percentage by weight sampling of the first step
Material, compound is stirred, sized mixing with 0.5~0.7 ratio of mud, and ash is compound, adds compound gross weight as 0.2
~0.5% foaming agent, foaming agent hydration reaction generation bubble is added, form the slurries of expansion, reduce the density of slurries；
The preparation of 3rd step, water-impervious well cementation test block resistance to compression slurries：Compound gross weight is added in slurries prepared by second step
For 5~8% glass fibre, by roller rotary spreading, uniform stirring is realized, adds the slurries of glass fibre, after grout cures
Test block high mechanical strength, crushing resistance enhancing；
4th step, water-impervious well cementation test block shock resistance slurries preparation, will the 3rd step prepare slurries in add after nodularization
Particle diameter is 20~50 μm of graphite microbeads, and addition is 1~3% graphite microbeads of first step compound weight, then adds the
The swollen resin of 0.5~1.0% water imbibition of one step compound weight, stirs, increases the mobility of slurries, grout cures
Test block shock resistance enhancing afterwards, swollen resin water suction reduce test block drop dehydration quantity；
5th step, water-impervious performance test：The slurries for taking the 4th step to prepare are poured into water-impervious analogue experiment installation, water-impervious mould
Draft experiment device includes base（1）, central tube（6）, outer tube（5）, top cover labyrinth（8）, lower sealing cover（2）, well-illuminated glass
（3）, special high-pressure pressurized equipment, central tube passes through（6）Wear outer tube（5）, central tube（6）Diameter has plurality of specifications, central tube（6）With
Outer tube（5）Between form annular space, by the injection of the slurries of expansion wherein, central tube（6）And outer tube（5）Micropore is respectively equipped with, outside
Pipe（5）It is provided with screen pack（4）, top cover labyrinth（8）And lower sealing cover（2）By central tube（6）And outer tube（5）Sealing, special height
Pressurized equipment is pressed by high-pressure pump, pressurized tank（9）With button composition, digital pressure gauge（7）Composition, simulation oil well depth as needed
Degree, set digital pressure gauge（7）Value, open shift knob, gases at high pressure enter central tube through piping（6）Annular seal space
It is interior, reach digital pressure gauge（7）During the value of setting, constant pressure observes well-illuminated glass after 30 minutes（3）In ooze the number of dehydration
Amount.
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Application publication date: 20180302 |