CN107964398A - A kind of low liquid-solid ratio oil well cement paste and preparation method - Google Patents
A kind of low liquid-solid ratio oil well cement paste and preparation method Download PDFInfo
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- CN107964398A CN107964398A CN201610916359.2A CN201610916359A CN107964398A CN 107964398 A CN107964398 A CN 107964398A CN 201610916359 A CN201610916359 A CN 201610916359A CN 107964398 A CN107964398 A CN 107964398A
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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
- C09K8/493—Additives for reducing or preventing gas migration
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Abstract
The invention discloses a kind of low liquid-solid ratio oil well cement paste and preparation method.Oil well cement paste is prepared by the raw material including following components：Each component is counted in parts by weight：100 parts of oil-well cement；10 25 parts of nodularization silica flour；Common 0 20 parts of silica flour；Wherein nodularization silica flour and common silica flour total amount are 20 40 parts；15 parts of liquid oil-well cement filtrate reducer；0.1 1.0 parts of oil well cement dispersant；50 55 parts of 49 54 parts of water, wherein oil-well cement filtrate reducer, water total number；Nodularization silica flour average grain diameter is between 110 180 μm, sphericity>0.9；Between common 10 μm 70 μm of silica flour average grain diameter.Low liquid-solid ratio channeling control cement slurry system of the present invention based on spheroidization silica flour, the cement mortar good fluidity of formation, permeability is low, and cement strength improves, while effectively reduces well cementation cost, improves Behavior of Hardened Cement Paste anti-channeling ability and durability.
Description
Technical field
The present invention relates to oil/gas well field, further say, be to be related to a kind of low liquid-solid ratio oil well cement paste and preparation side
Method.
Background technology
As gas well annular space phenomenon with pressure is more and more common, the anti-gas channeling ability of cement mortar, the sealing quality of cement sheath and
Durability is increasingly subject to the attention in industry.For current gas well at HTHP, oil well and other Holes of Complicated Wells, in order to effectively carry
The anti-channeling ability of high Behavior of Hardened Cement Paste, improves cement properties using the oil well cement additive and extra material of specific function, usually adopts
With materials such as latex, increase cement mortar vapour lock, while effectively reduce cement mortar permeability, improve cement mortar fleeing proof effect and enhancing
The durability of Behavior of Hardened Cement Paste；Second class method using no base nano-composite material, improves the density of Behavior of Hardened Cement Paste, strengthens cement mortar
Anti-channeling ability and durability；Three classes method uses tightly packed technology, improves the density of Behavior of Hardened Cement Paste, lifts cement mortar
Energy；4th class method uses supporting cementing technology, realizes that effectively pressure is steady.
Although above-mentioned technology achieves preferable application effect in applying at the scene, latex and inorganic nano are used
Material filling dramatically increases well cementation cost, while using tightly packed technology due to the difference and slurry design by cement in itself
Complexity, it is difficult to be widely used, supporting anti-channeling well shaft fixing technology usually requires the cementing concrete slurry of function admirable
System, can obtain good application effect.
The content of the invention
To solve produced problem in the prior art, the present invention provides a kind of low liquid-solid ratio oil well cement paste and preparation side
Method.Low liquid-solid ratio channeling control cement slurry system based on spheroidization silica flour, the cement mortar good fluidity of formation, permeability
Low, cement strength improves, and compared to the mortar architecture of same performance, can effectively reduce well cementation cost, effectively improve Behavior of Hardened Cement Paste and prevent
Alter ability and durability.
An object of the present invention is to provide a kind of low liquid-solid ratio high-performance anti-channeling oil-well cement slurry formula.
The oil well cement paste is prepared by the raw material including following components：
Each component is counted in parts by weight：
G grades of 100 parts of oil-well cements；
10~25 parts of nodularization silica flour, is preferably 15-25 parts；
Common 0~20 part of silica flour, is preferably 10-20 parts；
Wherein nodularization silica flour and common silica flour total amount are 20-40 parts；Preferably 35~40 parts；
1~5 part of liquid oil-well cement filtrate reducer, is preferably 2-4 parts；
0.1-1.0 parts of oil well cement dispersant；
49-54 parts of water；
Wherein 50-55 parts of oil-well cement filtrate reducer, water total number；
The nodularization silica flour average grain diameter is between 110-180 μm, sphericity>0.8；Nodularization silica flour is general using high-purity
Logical superfine silica powder, using plasma technology balling-up, forms the higher silica flour of sphericity, adds such suitable material, improve rolling
Pearl effect, improves cement mortar mobility, reduces the ratio of mud, overall to improve cement slurry property index.
Between common 10 μm -70 μm of the silica flour average grain diameter；
Liquid oil-well cement filtrate reducer 2- acrylamide-2-methylpro panesulfonic acids class (terpolymer AMPS, two
Member copolymerization AMPS), one kind in polyvinyl alcohol (borax be crosslinked PVA) or combination, be preferably polyvinyl alcohol；
The oil well cement dispersant is acetonformaldehyde polycondensation class, one kind in polycarboxylic acid or combination (sulfonation formaldehyde third
Ketone condensation polymer SAF, polyacrylic acid).
The water-solid ratio 0.38-0.40 of the oil well cement paste, Behavior of Hardened Cement Paste permeability<0.05mD, SPN<2.
Now with mortar architecture, if experimental temperature more than 110 DEG C, just necessarily require addition silica flour.Currently without
Cement mortar adds spheroidization silica flour；The effect of silica flour spheroidization is：After silica flour spheroidization in irregular shape, silicon can be strengthened
Ball effect of the powder in cement, increases the mobility of cement mortar, reduces liquid-solid ratio, improves the performance for adding sand cement slurry system.
The second object of the present invention is to provide a kind of preparation method of low liquid-solid ratio oil well cement paste.
The low liquid-solid ratio oil well cement paste is made after being stirred by the dosage in the component.
Cement mortar is configured using GB/T19139-2012 oil-well cement tests method
(1) powder body material is weighed according to component ratio, and puddled；
(2) liquid additive and water are proportionally weighed
(3) liquid additive and water are stirred into 30-60s in blender with 1000-2000 revs/min of rotating speed；
(4) powder body material is poured slowly into blender, 4000 revs/min of rotating speed, the time is less than 30s；
(5) mix cement according to 10000 revs/min of rotating speeds and starch 50s；
(6) stop stirring, form low liquid-solid ratio oil well cement paste
Compared with prior art, the beneficial effects of the invention are as follows：
(1) the similar cement mortar of mortar architecture water-solid ratio formed is low；
(2) the mortar architecture permeability formed is less than 0.05mD, and intensity is high；
(3) the cost-effective reduction of mortar architecture of the year-on-year same type of mortar architecture formed；
(4) Behavior of Hardened Cement Paste durability improves compared with conventional cement slurries；
(5) Behavior of Hardened Cement Paste prevents has channeling ability from improving compared with conventional cement slurries；
(6) Behavior of Hardened Cement Paste annular space sealability improves compared with conventional cement slurries.
Brief description of the drawings
The electron microscope of Fig. 1 nodularization silica flours；
Embodiment
With reference to embodiment, the present invention is further illustrated.
Embodiment 1
100 parts of mass weights are praised into magnificent G grades of oil-well cement, 15 parts of average grain diameters are 180 μm of spheroidization silica flours, ball-type degree
0.9 (S-SiOBall-180, Dezhou continental shelf company production) and 20 parts of average grain diameters for 70 μm common silica flour (S-SiO-70,
Dezhou continental shelf company produces), puddle in advance uniformly；Weigh 2 parts of oil-well cement filtrate reducers (DZJ-Y, Dezhou continental shelf company
Production), 1.0 parts of oil well cement dispersants (DZS, the production of Dezhou continental shelf company) are weighed, weigh 49 parts of clear water, the total water of system is consolidated
Than for：0.385, clear water, fluid loss agent, dispersant are poured into stirring slurry cup successively according to sequencing, according to 1000-
2000rpm rotating speeds stir 30-60s, and agitator speed is adjusted to 4000rpm, the cement for being mixed with silica flour is poured into 30s and stirs
Mix in slurry cup, after cement pours into slurry cup, adjustment rotating speed to 10000rpm, high-speed stirred 50s；Normal pressure multiviscosity meter temperature 93 is set
DEG C, starch the cement mortar configured and pour into multiviscosity meter slurry cup, conserve 20min, and use six speed viscosity meter cement mortar streams
Become performance, measure cement mortar flow pattern index n=0.71, and the cement mortar after maintenance is poured into intensity maintenance grinding tool, and be put into height
In warm high-pressure curing kettle, it is 20MPa and 130 DEG C to set maintenance pressure and temperature, and Behavior of Hardened Cement Paste gas permeability is measured after 48h and is
0.03mD, cement strength are 37.3MP a, measure and calculate SPN=1；Cement mortar 500ml, profit are configured using same method
It is 0.04% with the happy 4268ES types cement shrinkage of thousand morals/dilatometer measurement 7 days dilation amounts of Behavior of Hardened Cement Paste, shows as microdilatancy.
Durability evaluation of the cement sheath under stress fatigue is carried out using CP-1 type cement sheath long term seals evaluating apparatus, in 35MPa
Under the conditions of reversed of stress and 50 DEG C of temperature alternatings, in 100 cycle of cement sheath, so with good sealability.
Embodiment 2
100 parts of mass weights are praised into magnificent G grades of oil-well cement, 25 parts of average grain diameters are 110 μm of spheroidization silica flours, sphericity
0.9 (S-SiOBall-110, Dezhou continental shelf company production) and 10 parts of average grain diameters for 10 μm common silica flour (S-SiO-10,
Dezhou continental shelf company produces), puddle in advance uniformly；Weigh 4 parts of oil-well cement filtrate reducers (DZJ-Y, Dezhou continental shelf company
Production), 0.1 part of oil well cement dispersant (DZS, the production of Dezhou continental shelf company) is weighed, weighs 54 parts of clear water, the total water of system is consolidated
Than for 0.429, clear water, fluid loss agent, dispersant being poured into stirring slurry cup successively according to sequencing, according to 1000-
2000rpm rotating speeds stir 30-60s, and agitator speed is adjusted to 4000rpm, the cement for being mixed with silica flour is poured into 30s and stirs
Mix in slurry cup, after cement pours into slurry cup, adjustment rotating speed to 10000rpm, high-speed stirred 50s；Normal pressure multiviscosity meter temperature 93 is set
DEG C, starch the cement mortar configured and pour into multiviscosity meter slurry cup, conserve 20min, and use six speed viscosity meter cement mortar streams
Become performance, measure cement mortar flow pattern index n=0.65, and the cement mortar after maintenance is poured into intensity maintenance grinding tool, and be put into height
In warm high-pressure curing kettle, it is 20MPa and 130 DEG C to set maintenance pressure and temperature, and Behavior of Hardened Cement Paste gas permeability is measured after 48h and is
0.04mD, cement strength 35.2Mpa, measure and calculate SPN=1.5；Cement mortar 500ml is configured using same method,
It is 0.02% using the happy 4268ES types cement shrinkage of thousand morals/dilatometer measurement 7 days dilation amounts of Behavior of Hardened Cement Paste, shows as micro- swollen
It is swollen.Durability evaluation of the cement sheath under stress fatigue is carried out using CP-1 type cement sheath long term seals evaluating apparatus,
Under the conditions of 35MPa reversed of stress and 50 DEG C of temperature alternatings, in 100 cycle of cement sheath, so with good sealability.
Comparative example 1
100 parts of mass weights are praised into magnificent G grades of oil-well cement, common silica flour that 35 parts of average grain diameters are 70 μm (S-SiO-70,
Dezhou continental shelf company produces), puddle in advance uniformly；Weigh 4 parts of oil-well cement filtrate reducers (DZJ-Y, Dezhou continental shelf company
Production), 0.5 part of oil well cement dispersant (DZS, the production of Dezhou continental shelf company) is weighed, weighs 55.4 parts of clear water (water-solid ratios
0.44), clear water, fluid loss agent, dispersant are poured into successively according to sequencing in stirring slurry cup, turned according to 1000-2000rpm
Speed stirring 30-60s, agitator speed is adjusted to 4000rpm, pours into the cement for being mixed with silica flour in stirring slurry cup in 30s,
After cement pours into slurry cup, adjustment rotating speed to 10000rpm, high-speed stirred 50s；93 DEG C of normal pressure multiviscosity meter temperature is set, and slurry configures
Cement mortar pour into multiviscosity meter slurry cup, conserve 20min, and use six speed viscosity meter slurry flowing performance-changings, measurement
Cement mortar flow pattern index n=0.75, and the cement mortar after maintenance is poured into intensity maintenance grinding tool, and it is put into high temperature and pressure protective cauldron
In, it is 20MPa and 130 DEG C to set maintenance pressure and temperature, and it is 0.24mD that Behavior of Hardened Cement Paste gas permeability is measured after 48h, Behavior of Hardened Cement Paste
Intensity is 21.4MPa；Cement mortar 500ml is configured using same method, utilizes the happy 4268ES types cement shrinkage/dilatometer of thousand morals
It is -0.18% to measure 7 days dilation amounts of Behavior of Hardened Cement Paste, shows as shrinking.Evaluated and filled using CP-1 type cement sheaths long term seal
Put the durability evaluation for carrying out cement sheath under stress fatigue, under the conditions of 35MPa reversed of stress and 50 DEG C of temperature alternatings, cement
Has channeling occurs for 13 cycle of ring cement sheath.
Comparative example 2
100 parts of mass weights are praised into magnificent G grades of oil-well cement, common silica flour that 35 parts of average grain diameters are 70 μm (S-SiO-70,
Dezhou continental shelf company produces), puddle in advance uniformly；Weigh 4 parts of oil-well cement filtrate reducers (DZJ-Y, Dezhou continental shelf company
Production), weigh 0.5 part of oil well cement dispersant (DZS, Dezhou continental shelf company production), weigh 15 parts of styrene-butadiene latex (DC200,
Dezhou continental shelf company produces), 40.4 parts of clear water (liquid-solid ratio 0.44) are weighed, by clear water, styrene-butadiene latex, fluid loss agent, scattered
Agent is poured into stirring slurry cup successively according to sequencing, 30-60s is stirred according to 1000-2000rpm rotating speeds, by agitator speed
Adjust to 4000rpm, pour into the cement for being mixed with silica flour in stirring slurry cup in 30s, after cement pours into slurry cup, adjustment rotating speed is extremely
10000rpm, high-speed stirred 50s；93 DEG C of normal pressure multiviscosity meter temperature is set, the cement mortar configured is starched and pours into multiviscosity meter slurry cup,
20min is conserved, and uses six speed viscosity meter slurry flowing performance-changings, measures cement mortar flow pattern index n=0.61, and will
Cement mortar after maintenance pours into intensity maintenance grinding tool, and is put into high temperature and pressure protective cauldron, and setting maintenance pressure and temperature is
20MPa and 130 DEG C, it is 0.08mD, cement strength 24.4MPa that Behavior of Hardened Cement Paste gas permeability is measured after 48h；Using same
Method configures cement mortar 500ml, and 7 days dilation amounts of Behavior of Hardened Cement Paste are measured using the happy 4268ES types cement shrinkage of thousand morals/dilatometer
For 0.05%, microdilatancy is shown as.Cement sheath is carried out in stress fatigue using CP-1 type cement sheath long term seals evaluating apparatus
Under durability evaluation, under the conditions of 35MPa reversed of stress and 50 DEG C of temperature alternatings, 100 cycle of cement sheath cement sheath does not occur
Has channeling；
By embodiment 1 and embodiment 2 and 1 conventional cement slurries of comparative example it can be found that using spheroidization silica flour, effective
When reducing cement mortar liquid-solid ratio, Behavior of Hardened Cement Paste permeability significantly reduces, and decreases by 82.14%, 48 it is small when cement strength improve
39.2%, fatigue period is improved to 100 more than the cycle, can effectively improve cement sheath durability.
For embodiment compared with latex-cement slurry in comparative example 2, Behavior of Hardened Cement Paste permeability is suitable, and the durability of Behavior of Hardened Cement Paste is suitable,
But this can significantly reduce cement mortar cost using spheroidization silica flour.
Claims (7)
1. a kind of low liquid-solid ratio oil well cement paste, it is characterised in that the oil well cement paste is the raw material system by including following components
It is standby and obtain：
Each component is counted in parts by weight：
100 parts of oil-well cement；
10-25 parts of nodularization silica flour；
Common 0-20 parts of silica flour；
Wherein nodularization silica flour and common silica flour total amount are 20-40 parts；
1-5 parts of liquid oil-well cement filtrate reducer；
0.1-1.0 parts of oil well cement dispersant；
49-54 parts of water；
Wherein 50-55 parts of oil-well cement filtrate reducer, water total number；
The nodularization silica flour average grain diameter is between 110-180 μm, sphericity>0.8；
Between common 10 μm -70 μm of the silica flour average grain diameter.
2. low liquid-solid ratio oil well cement paste as claimed in claim 1, it is characterised in that：
15-20 parts of nodularization silica flour；
Common 10-20 parts of silica flour；
Nodularization silica flour and common silica flour total amount are 35-40 parts；
2-4 parts of liquid oil-well cement filtrate reducer.
3. low liquid-solid ratio oil well cement paste as claimed in claim 1, it is characterised in that：
The liquid oil-well cement filtrate reducer is 2- acrylamide-2-methylpro panesulfonic acids class, one kind in polyvinyl alcohol
Or combination.
4. low liquid-solid ratio oil well cement paste as claimed in claim 3, it is characterised in that：
The liquid oil-well cement filtrate reducer is polyvinyl alcohol.
5. low liquid-solid ratio oil well cement paste as claimed in claim 1, it is characterised in that：
The oil well cement dispersant is acetonformaldehyde polycondensation class, one kind in polycarboxylic acid or combination.
6. the low liquid-solid ratio oil well cement paste as described in one of Claims 1 to 5, it is characterised in that：
The water-solid ratio 0.38-0.40 of the oil well cement paste, Behavior of Hardened Cement Paste permeability<0.05mD, SPN<2.
7. the preparation method of a kind of low liquid-solid ratio oil well cement paste as described in one of claim 1~6, it is characterised in that described
Method includes：
The low liquid-solid ratio oil well cement paste is made after being stirred by the dosage in the component.
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