CN108516756A - High temperature resistance anti-gas channeling cement system and preparation method thereof - Google Patents
High temperature resistance anti-gas channeling cement system and preparation method thereof Download PDFInfo
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- CN108516756A CN108516756A CN201810472485.2A CN201810472485A CN108516756A CN 108516756 A CN108516756 A CN 108516756A CN 201810472485 A CN201810472485 A CN 201810472485A CN 108516756 A CN108516756 A CN 108516756A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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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
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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
- C09K8/48—Density increasing or weighting additives
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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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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/08—Fiber-containing well treatment fluids
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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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/10—Nanoparticle-containing well treatment fluids
Abstract
The present invention relates to petroleum drilling engineering fields more particularly to a kind of high temperature resistance anti-gas channeling cement system and preparation method thereof.High temperature resistance anti-gas channeling cement system of the present invention, is counted in parts by weight, including：65 90 parts of 100 parts of cement, 60 parts of compound silica flour, 1 1.5 parts of inorganic toughened fiber, 1.5 3 parts of fluid loss agent, 0.3 0.7 parts of dispersant, 6 10 parts of latex anti-migration agent, 1 1.2 parts of latex stabilizer, 6 10 parts of nano fluid silicon, 2.5 8 parts of high temperature retarder, 1 1.5 parts of antifoaming agent and water.The high temperature resistance anti-gas channeling cement system preparation method, includes the following steps：(1) cement, silica flour, inorganic toughened fiber are uniformly mixed according to a ratio；(2) fluid loss agent, dispersant, latex anti-migration agent, latex stabilizer, nano fluid silicon, high temperature retarder, antifoaming agent and water are uniformly mixed according to a ratio；(3) mixture of step (1) is poured slowly into the mixture of step (2), blender is used in combination quickly to stir.
Description
Technical field
The present invention relates to petroleum drilling engineering field more particularly to a kind of high temperature resistance anti-gas channeling cement system and its preparation sides
Method.
Background technology
With going deep into for west area oil-gas exploration, deep-well, ultradeep well are more and more, and deep well cementing faces the anti-height of cement mortar
The problems such as temperature stability performance requirement is high, cement mortar anti-gas channeling difficulty is big, cementing practice and realization oil/gas well are given birth to steadily in the long term
Production is the key that well cementing operation.
Well cementing mortar architecture and Matching technology are then that annular channeling occurs after preventing well cementation, maintain oil/gas well
The key produced steadily in the long term.Annular space channelling is to perplex the problem of well cementing operation for many years, and there are mainly three types of the origin causes of formation：First, interface
Caused by weak bond, it is primarily due to the presence of mud cake, causes cement sheath interface and formation cementation bad；Second is that cement
Slurry weightlessness causes annular space channelling；Third, it is since cement sheath cannot that cement sheath microcrack-microannulus, which causes annular space channelling, microannulus,
Very well with casing it is cementing caused by.
In view of the above-mentioned problems, both at home and abroad for the mechanism of annular gas channeling, prediction technique and gas channeling prevention well cementing technical side after well cementation
Method has carried out a large amount of research work, also achieves many practicable achievements in research；But for ultradeep well high temperature gas-tight
It alters cementing technology problem to be efficiently solved not yet, as along the well cementation of south area, presently, there are superhigh temperature, high pressure, gas-tights in tower
It alters in the cementing technologies such as difficulty problem and tower and is badly in need of the Pinch technology problem solved along South block oil-gas exploration and development.
The oil-well cement that oil field at home uses is essentially all portland cement, and silicate cement mudstone intensity has stagnation temperature
Degree, when reaching critical-temperature or more, strength retrogression can occur for cement strength, and occur with the difference of curing condition
Significant change.
Invention content
Depth, strata pressure height are buried for carbonate reservoir in Tahe Oilfield, leads to cement mortar high temperature resistance performance for stability
It is required that the problems such as high, cement mortar anti-gas channeling difficulty is big, the present invention provides a kind of high temperature resistance anti-gas channeling cement system and its preparations
Method.It is specific as follows：
On the one hand, it the present invention provides a kind of high temperature resistance anti-gas channeling cement system, counts in parts by weight, including：Cement 100
Part, 60 parts of compound silica flour, toughened fiber 1-1.5 parts inorganic, 1.5-3 parts of fluid loss agent, 0.3-0.7 parts of dispersant, latex anti-channeling
6-10 parts of agent, 1-1.2 parts of latex stabilizer, 6-10 parts of nano fluid silicon, 2.5-8 parts of high temperature retarder, 1-1.5 parts of antifoaming agent and
65-90 parts of water.
Above-mentioned high temperature resistance anti-gas channeling cement system, is counted in parts by weight, including：100 parts of cement, 60 parts of compound silica flour,
1 part of inorganic toughened fiber, 2 parts of fluid loss agent, 0.5 part of dispersant, 10 parts of latex anti-migration agent, 1 part of latex stabilizer, nano fluid silicon
65 parts of 10 parts, 2.8 parts of high temperature retarder, 1.2 parts of antifoaming agent and water.
Above-mentioned high temperature resistance anti-gas channeling cement system, is counted in parts by weight, including 40-210 parts of weighting material.
Above-mentioned high temperature resistance anti-gas channeling cement system, the cement mainly by tricalcium silicate, dicalcium silicate, tricalcium aluminate and
Tetra calcium aluminoferrite forms, and grain size is 20-60 μm.
Above-mentioned high temperature resistance anti-gas channeling cement system, the compound silica flour by silica flour that grain size is 80 mesh and 180 mesh according to
3：7 ratio mixing obtains.
Above-mentioned high temperature resistance anti-gas channeling cement system, a diameter of 10-100 μm of the inorganic toughened fiber.
Above-mentioned high temperature resistance anti-gas channeling cement system, the fluid loss agent are AMPS multiple copolymers.
Above-mentioned high temperature resistance anti-gas channeling cement system, the dispersant are sulfonated ketone aldehyde polycondensate.
Above-mentioned high temperature resistance anti-gas channeling cement system, the latex anti-migration agent are styrene-butadiene latex.
The density of above-mentioned high temperature resistance anti-gas channeling cement system, the nano fluid silicon is 1.37g/cm3, effective solid content is
45%, solid particle average grain diameter is 160nm or so, specific surface area 23m2/g。
Above-mentioned high temperature resistance anti-gas channeling cement system, the antifoaming agent are tbp.
Above-mentioned high temperature resistance anti-gas channeling cement system, the weighting material are Iron Ore Powder.
On the other hand, the present invention provides a kind of high temperature resistance anti-gas channeling cement system preparation method, include the following steps：
(1) cement, silica flour, inorganic toughened fiber are uniformly mixed according to a ratio；
(2) by fluid loss agent, dispersant, latex anti-migration agent, latex stabilizer, nano fluid silicon, high temperature retarder, antifoaming agent
It is uniformly mixed according to a ratio with water；
(3) mixture of step (1) is poured slowly into the mixture of step (2), blender is used in combination quickly to stir.
Above-mentioned high temperature resistance anti-gas channeling cement system preparation method, which is characterized in that the blender is homogenizer,
Rotating speed is 4000 revs/min.
High temperature resistance anti-gas channeling cement system provided by the invention has following advantageous effect：
The high temperature resistance anti-gas channeling cement system API fluid losses of the present invention are less than 50mL, are at right angles thickened, without free liquid, SPN
Value is less than 1, and cold slurry fluidity is not less than 20cm, net gel strength 48-240Pa transit times<15min, Behavior of Hardened Cement Paste compression strength
Up to 30MPa, elasticity modulus down to 8.6GPa, high temperature (200 DEG C) high-pressure curing after 30 days and 60 days compression strength be more than>
18MPa, permeability are less than 0.1mD.
High temperature resistance anti-gas channeling cement system provided by the invention belongs to the mortar architecture of extra-high temperature high pressure formation sealing.
Wherein, the characteristics of cement mortar has good fluidity, and stable high-temperature strength is good, cementing strength is high, strong shock resistance；Behavior of Hardened Cement Paste
Inorfil therein can be observed in microstructure even compact, free from flaw, has excellent high-temperature aging resisting performance, cement
Stone comprehensive mechanical property and outstanding anti-gas channeling performance.The high temperature resistance anti-gas channeling cement system of the present invention can efficiently solve super
Deep gas well cementing problem.
Description of the drawings
Fig. 1 is that high temperature resistance anti-gas channeling cement system prepared by embodiment 1 is thickened curve；
Fig. 2 is that high temperature resistance anti-gas channeling cement system prepared by embodiment 2 is thickened curve；
Fig. 3 is that high temperature resistance anti-gas channeling cement system prepared by embodiment 3 is thickened curve；
Fig. 4 is that high temperature resistance anti-gas channeling cement system prepared by embodiment 4 is thickened curve；
Fig. 5 is that high temperature resistance anti-gas channeling cement system prepared by embodiment 5 is thickened curve；
Fig. 6 is the density high point (1.92g/cm of high temperature resistance anti-gas channeling cement system prepared by embodiment 13) thickening curve；
Fig. 7 is (155 DEG C) thickening curves of temperature high point of high temperature resistance anti-gas channeling cement system prepared by embodiment 2；
Fig. 8 is (145 DEG C) thickening curves of temperature low spot of high temperature resistance anti-gas channeling cement system prepared by embodiment 1；
Fig. 9 is that high temperature resistance anti-gas channeling cement system prepared by embodiment 1 shuts down 60min thickening curves；
Figure 10 be embodiment 1 prepare high temperature resistance anti-gas channeling cement system at 190 DEG C net gel strength progress curve；
Figure 11 be embodiment 5 prepare high temperature resistance anti-gas channeling cement system at 170 DEG C net gel strength progress curve；
Figure 12 be embodiment 1 prepare high temperature resistance anti-gas channeling cement system at 160 DEG C ultrasonic intensity progress curve；
Figure 13 be embodiment 3 prepare high temperature resistance anti-gas channeling cement system at 190 DEG C ultrasonic intensity progress curve.
Specific implementation mode
In order to fully understand the purpose of the present invention, feature and effect, by following specific implementation modes, the present invention is made detailed
It describes in detail bright.For the process of the present invention in addition to following the description, remaining is all made of the conventional method or device of this field.Following nouns
Term is unless otherwise stated, all have the normally understood meaning of those skilled in the art.
In the development process of oil gas field, well cementation is an important link of drilling completion operation.It not only can guarantee height
Production stablizes, and can extend the service life of oil/gas well, improves stratum recovery ratio.In well cementing operation, formation fluid is effectively prevent to alter
It is lost in a great problem of construction.The present invention is used in compounding by nano fluid silicon agent for anti gassing-out and latex agent for anti gassing-out, enhances water
Mud anti-gas channeling performance；It is compounded by different-grain diameter silica flour, enhances Behavior of Hardened Cement Paste high-temperature stability；By adding inorfil,
Improve cement mortar malleable energy.The present invention solves the problems, such as that extra-high temperature high-pressure gas well cementing quality is poor.
Specifically, according to the first aspect of the invention, the present invention provides a kind of high temperature resistance anti-gas channeling cement systems, press
Parts by weight meter, including：100 parts of cement, 60 parts of compound silica flour, toughened fiber 1-1.5 parts inorganic, 1.5-3 parts of fluid loss agent,
0.3-0.7 parts of dispersant, 6-10 parts of latex anti-migration agent, 1-1.2 parts of latex stabilizer, 6-10 parts of nano fluid silicon, high temperature retarder
2.5-8 parts, 1-1.5 parts of antifoaming agent, 65-90 parts of water；Preferably, it counts in parts by weight, including：100 parts of cement, compound silica flour
60 parts, 1 part of inorganic toughened fiber, 2 parts of fluid loss agent, 0.5 part of dispersant, 10 parts of latex anti-migration agent, 1 part of latex stabilizer, receive
10 parts of rice liquid silicon, 2.8 parts of high temperature retarder, 1.2 parts of antifoaming agent, 65 parts of water.
Optionally, in some preferred embodiments, high temperature resistance anti-gas channeling cement system of the invention further includes 40-210
The weighting material of parts by weight.
Wherein, the cement is Aksu G grades of oil-well cement, and grain size is 20-60 μm, mainly by tricalcium silicate, silicic acid two
Calcium, tricalcium aluminate, tetra calcium aluminoferrite composition.
Wherein, the compound silica flour main component is SiO2, by silica flour that grain size is 80 mesh and 180 mesh according to 3：7
Ratio mixing obtains.It is applied in combination by thickness silica flour, Behavior of Hardened Cement Paste mechanical performance under hot conditions can be significantly improved, to protect
High-pressure gas well sealing quality is hindered.
Wherein, the inorganic toughened fiber is a diameter of 10-100 μm, and raw material are in the limited public affairs of Sinopec's share
Take charge of the purchase of petroleum works Institute for Research and Technology, product type SFP-3.
Inorganic toughened fiber is to use special inorganic material for raw material, through specifically pre-processing, in high-temperature fusion, refinement
It reels off raw silk from cocoons and is surface-treated through special.Fiber smooth in appearance is complete, and so that it is easily disperseed containing hydrophilic radical, and has
Excellent high temperature resistance.Reticular structure can be formed in Behavior of Hardened Cement Paste, and higher elasticity modulus can more effectively inhibit cement
The generation and extension of stony fracture line improve Behavior of Hardened Cement Paste impact resistance.In addition, its high elastic modulus characteristic ensure that it in shaft bottom high temperature
Under still have enough mechanical strengths, bridging networking simultaneously reduce cement mortar leakage.
Wherein, fluid loss agent is AMPS multiple copolymer analogs, specifically, the entitled 2- acrylamidos -2- of chemistry of AMPS
Methyl propane sulfonic acid, have heat and salinity tolerance performance is good, filter loss, the viscosity of drilling fluid that can control drilling fluid higher are easy to control,
The advantages that rheological characteristic is good, dosage is few.The AMPS materials of the present invention are by Sinopec Group's petroleum works technology
Research institute buys, product type SCF200.
Wherein, the dispersant is sulfonated acetone formaldehyde polycondensate, and material is by Sinopec Group's stone
Oily engineering and technological research institute purchase, product type DZS.
Wherein, the latex anti-migration agent is styrene-butadiene latex DC200, is formed by butadiene and styrene low temperature polymerization, is benzene
The emulsion copolymers of ethylene-butylene.Material purchase has from sinopec petroleum works Institute for Research and Technology, product type DC200
Have good elasticity, cement mortar formed filter cake when a part of butadiene-styrene latex is jammed, be filled in cement granules between gap make filter
The permeability reduction of cake；On the other hand, a part of butadiene-styrene latex assembles film forming under the action of pressure difference between cement granules, into one
Step makes the permeability reduction of filter cake.In addition, forming oxygen by the double bond and grid structure of latex and with Si, O, S in cement
Bridge, sulphur bridge, the high-energy of coalescence make cement mortar have excellent high temperature resistance.
Wherein, latex stabilizer of the invention is latex stabilizer SD-1, and material purchase has from Sinopec's share
Petroleum works Institute for Research and Technology of limit company, product type SD-1.It is polyphyly chemically active surface object, is that can increase latex particle
Surface sheet charge, protective layer and hydrauture avoid latex or latex mixing from being sent out during storage, mechanically actuated and compounding aid
The substance of raw incipient gel precipitation.
Wherein, the nano fluid silicon (SCLS) is that a kind of novel gas-tight alters agent, is by spherical nano-silicon dioxide particle
The lotion being mixed to form by emulsion dispersion and water, lotion density are 1.37g/cm3, effective solid content is up to 45%.In lotion
Silica dioxide granule average grain diameter is 160nm or so, is more than one the percent of cement average grain diameter, specific surface area is up to 23m2/
There is g extremely strong surface-active and chemism, storage cycle to be up to 1 year, meet live memory requirement, and due to nano-emulsion
Active material is nanometer grade silica in liquid, and as inorganic stabilizers material, high temperature ageing has little effect its performance, because
This is applicable to medium and high temperature Cementing application.
High temperature retarder is a kind of chemical property stabilization, can extend the substance of cement thickening (condensation) time.Wherein, originally
The high temperature retarder of invention is high temperature retarder SCR-3, is AA multiple copolymer analogs, and material is bought from sinopec petroleum works
Institute for Research and Technology, product type SCR-3.By unique Molecular Design, with salt resistance, heatproof sulfonate groups for main structure
At in addition, introducing a kind of rigid unitary with shielding group in molecular structure so that high temperature retarder SCR-3 is at high temperature
Slow setting characteristic it is more efficient, stablize.
Wherein, the antifoaming agent is tbp, and the film of established foam can effectively be made to be in unstable
State and defoam rapidly.
Wherein, the weighting material is Iron Ore Powder.Its main component is Fe2O3, density 4.9-5.3g/cm3, density
It is larger, therefore can be used for preparing the higher high temperature resistance anti-gas channeling cement system of density.If high temperature resistance anti-gas channeling cement system added
Weight is to a certain given density, and when selecting Iron Ore Powder, the solid concentration after exacerbation in drilling fluid is obviously than selecting other add
It is lower when heavy material, therefore, is conducive to the regulation and control of rheological property and improves drilling speed.
The synergy of above-mentioned each component is as follows：
The invention discloses a kind of high temperature resistance anti-gas channeling cement systems.By integrating liquid silicon, two big anti-gas channeling auxiliary agent of latex,
Optimize latex solution silicon mortar architecture, collaboration thickness silica flour combination significantly improves Behavior of Hardened Cement Paste mechanical performance under hot conditions, effectively
Ensure high-pressure gas well sealing quality.The present invention is used in compounding by nano fluid silicon agent for anti gassing-out and latex agent for anti gassing-out, enhances water
Mud anti-gas channeling performance, is compounded by different-grain diameter silica flour, enhances Behavior of Hardened Cement Paste high-temperature stability；By adding inorfil, carry
High cement slurry malleable energy.Solve the problems, such as that extra-high temperature high-pressure gas well cementing quality is poor.
According to another aspect of the present invention, the present invention provides a kind of high temperature resistance anti-gas channeling cement system preparation method, packets
Include following steps：
(1) G grades of oil-well cements, silica flour, inorganic toughened fiber are uniformly mixed according to a ratio；
(2) by fluid loss agent, dispersant, latex anti-migration agent, latex stabilizer, nano fluid silicon, high temperature retarder, antifoaming agent
With water by being uniformly mixed according to a ratio；
(3) mixture of step (1) is poured slowly into the mixture of step (2), be used in combination homogenizer with 4000 turns/
The rotating speed divided quickly stirs.
Embodiment
It is further illustrated the present invention below by the mode of embodiment, but does not therefore limit the present invention to the reality
It applies among a range.In the following examples, the experimental methods for specific conditions are not specified, according to conventional methods and conditions.Following implementation
The raw material used in example is that regular market purchase obtains.
The title of each component or product type are in embodiment 1-5：Cement is Aksu G grades of oil-well cement, compound silica flour
By silica flour that grain size is 80 mesh and 180 mesh according to 3：7 ratio is mixed to get, and inorganic toughened fiber is SFP-3, and fluid loss agent is
SCF200, dispersant are sulfonated acetone formaldehyde polycondensate, and latex anti-migration agent is styrene-butadiene latex DC200, and latex stabilizer is latex
Stabilizer SD-1, high temperature retarder are high temperature retarder SCR-3, and antifoaming agent is tbp.
Embodiment 1
(1) cement, silica flour, inorganic toughened fiber are uniformly mixed according to a ratio；(2) fluid loss agent, dispersant, latex are prevented
Agent, latex stabilizer, nano fluid silicon, high temperature retarder, antifoaming agent and water are altered by being uniformly mixed according to a ratio；(3) by step (1)
Mixture is poured slowly into the mixture of step (2), and homogenizer is used in combination quickly to be stirred with 4000 revs/min of rotating speed.
Wherein, the mass parts composition of cement mortar is as follows：100 parts of cement, 60 parts of compound silica flour, 1 part of inorganic toughened fiber, drop
2 parts of dehydration agent, 0.5 part of dispersant, 10 parts of latex anti-migration agent, 1 part of latex stabilizer, 10 parts of nano fluid silicon, high temperature retarder
2.8 parts, 1.2 parts of antifoaming agent, 65 parts of water.
Embodiment 2
The cement mortar of high temperature resistance anti-gas channeling cement system is prepared in the same manner as shown in Example 1, wherein in cement mortar
The mass parts composition of each ingredient is as follows：100 parts of cement, 60 parts of compound silica flour, 40 parts of Iron Ore Powder, 1.5 parts of inorganic toughened fiber,
1.8 parts of fluid loss agent, 0.7 part of dispersant, 10 parts of latex anti-migration agent, 1.2 parts of latex stabilizer, 6 parts of nano fluid silicon, high temperature are slow
Solidifying 2.5 parts of agent, 1.2 parts of antifoaming agent, 70 parts of water.
Embodiment 3
The cement mortar of high temperature resistance anti-gas channeling cement system is prepared in the same manner as shown in Example 1, wherein in cement mortar
The mass parts composition of each ingredient is as follows：100 parts of cement, 60 parts of compound silica flour, 57 parts of Iron Ore Powder, 1 part of inorganic toughened fiber, drop
1.8 parts of dehydration agent, 0.7 part of dispersant, 10 parts of latex anti-migration agent, 1.2 parts of latex stabilizer, 6 parts of nano fluid silicon, high temperature retarder
2.5 parts, 1.2 parts of antifoaming agent, 70 parts of water.
Embodiment 4
The cement mortar of high temperature resistance anti-gas channeling cement system is prepared in the same manner as shown in Example 1, wherein in cement mortar
The mass parts composition of each ingredient is as follows：100 parts of cement, 60 parts of compound silica flour, 75 parts of Iron Ore Powder, 3 parts of micro- silicon, inorganic toughening are fine
1 part of dimension, 3 parts of fluid loss agent, 8 parts of nano fluid silicon, 10 parts of latex anti-migration agent, 1 part of latex stabilizer, 1 part of antifoaming agent, high temperature slow setting
2.5 parts of agent, 85 parts of water.
Embodiment 5
The cement mortar of high temperature resistance anti-gas channeling cement system is prepared in the same manner as shown in Example 1, wherein in cement mortar
The mass parts composition of each ingredient is as follows：100 parts of cement, 67 parts of compound silica flour, 210 parts of Iron Ore Powder, 1.5 parts of fluid loss agent, latex
6 parts of anti-migration agent, 1.2 parts of latex stabilizer, 1.5 parts of antifoaming agent, 10 parts of nano fluid silicon, 8 parts of high temperature retarder, 0.3 part of dispersant,
90 parts of water.
Performance test
In order to study the performance of high temperature resistance anti-gas channeling cement system of the invention, inventor resists embodiment 1-5 preparations
The cement mortar of high temperature anti-gas channeling cement system and the performance of Behavior of Hardened Cement Paste are tested.
First, inventor has studied the basic nature of the cement mortar of high temperature resistance anti-gas channeling cement system prepared by embodiment 1-5
Can, used method is the known method of this field, and this will not be detailed here, and test result is as shown in table 1：
High temperature resistance channeling control cement slurry system basic performance prepared by 1 embodiment 1-5 of table summarizes
As it can be seen from table 1 the density of high temperature resistance channeling control cement slurry system prepared by embodiment 1-5 is 1.88-
2.41g/cm3, rheological characteristic is good, the API dehydrations in 160 DEG C of high temperature<50mL can meet high temperature well Cementing application requirement.
Inventor is investigated the thickening curve of high temperature resisting cement grout system prepared by embodiment 1-5, wherein thickening curve
For under given conditions, curve that the consistency of cement mortar changes over time.
Thickening curve from Fig. 1 to Fig. 5 can be seen that high temperature resistance anti-gas channeling cement system thickening prepared by embodiment 1-5
Curve is gentle, and is thickened transit time less than 5min, is conducive to prevent has channeling energy.
By Fig. 6 to Fig. 9 it is found that the diverging thickening curve of the high temperature resistance anti-gas channeling cement system of the present invention is at right angles thick
Change；Cement slurry density variation is smaller on cement slurry thickening time influence, and cement slurry thickening time is shortened in temperature raising；It shuts down
Restore soon after cement consistency slightly goes up after 60min steady, the results showed that high temperature resistance anti-gas channeling body of cement of the invention
It is that there is good high-temperature stability, of short duration stop operation does not interfere with subsequent construction in work progress.
In addition, inventor is investigated the strength development curve of high temperature resistance anti-gas channeling cement system of the present invention, it is as a result as follows：
Figure 10 and Figure 11 is the net gel strength progress curve of high temperature resistance anti-gas channeling cement system of the present invention, it follows that close
Degree is 1.88g/cm3190 DEG C of high temperature resistance channeling control cement slurry system (embodiment 1) at net gel strength by 48Pa ↗ 240Pa
Time is 11min；Density 2.41g/cm3170 DEG C of high temperature resistance channeling control cement slurry system (embodiment 5) at net gel strength by
The 48Pa ↗ 240Pa times are 15min, are conducive to prevent has channeling.
Figure 12 and Figure 13 is high temperature resistance anti-gas channeling cement system ultrasonic intensity progress curve of the present invention, it follows that this
The Behavior of Hardened Cement Paste of the high temperature resistance anti-gas channeling cement system of invention is in sustainable growth state, no decline in 72h at 160 DEG C；At 190 DEG C
Cement strength rises to after peak in 48h slightly decrease after to steady, later strength is gradually restored.
Finally, inventor has studied the performance of the Behavior of Hardened Cement Paste of high temperature resistance anti-gas channeling cement system of the present invention, experimental result is shown in
Shown in table 2 and table 3.
The cement strength of high temperature resistance anti-gas channeling cement system under 2 different curing of table
As shown in Table 2, within the scope of 150-205 DEG C, intensity entirety table in high temperature resistance anti-gas channeling Behavior of Hardened Cement Paste 10d of the invention
It is now steady；Conventional density high temperature resistance anti-gas channeling Behavior of Hardened Cement Paste intensity after 205 DEG C of High Temperature Curing 10d still reaches 46.8MPa,
2.05g/cm3High density high temperature resistance anti-gas channeling Behavior of Hardened Cement Paste intensity after 200 DEG C of High Temperature Curing 10d is still up to 28.3MPa, meets
Field application requirement.
The Behavior of Hardened Cement Paste long-term mechanical property of high temperature resistance anti-gas channeling cement system prepared by 3 embodiment 4 of table
As shown in Table 3, after after the maintenance of 200 DEG C × 21MPa high temperature and pressure, high temperature resistance anti-gas channeling Behavior of Hardened Cement Paste of the invention
60d intensity is still up to 59.29MPa, intensity high 2MPa when than 30d；Elasticity modulus is down to 6.9GPa when 60d；And when with maintenance
Between from 30d extend to 60d, Behavior of Hardened Cement Paste gas gaging hole porosity and gas permeability further decrease, respectively to 20.5% He
0.0036mD, the more conventional Behavior of Hardened Cement Paste 0.28mD of gas permeability are substantially reduced, and favorably prevent gas from permeating.
In conclusion the high temperature resistance anti-gas channeling cement system of the present invention has good fluidity, stable high-temperature strength is good, glue
The characteristics of knotting strength height, strong shock resistance, the stabilization of Behavior of Hardened Cement Paste can be kept for a long time, and it is solid to well solve ultra-deep gas well
Well problem.
The present invention is hereinbefore disclosed with preferred embodiment, but it should be understood by those skilled in the art that, these
Embodiment is only used for describing the present invention, and should not be construed as limiting the scope of the invention.It should be noted that every implement with these
Example equivalent variation and displacement, should all be set as being covered by scope of the presently claimed invention.Therefore, protection scope of the present invention
The range that should be subject to defined in claims.
Claims (14)
1. a kind of high temperature resistance anti-gas channeling cement system, which is characterized in that it counts in parts by weight, including：100 parts of cement, comprehensive silicon
60 parts of powder, toughened fiber 1-1.5 parts inorganic, 1.5-3 parts of fluid loss agent, 0.3-0.7 parts of dispersant, 6-10 parts of latex anti-migration agent,
65-90 parts of 1-1.2 parts of latex stabilizer, 6-10 parts of nano fluid silicon, 2.5-8 parts of high temperature retarder, 1-1.5 parts of antifoaming agent and water.
2. high temperature resistance anti-gas channeling cement system according to claim 1, which is characterized in that it counts in parts by weight, including：Water
100 parts of mud, 60 parts of compound silica flour, 1 part of inorganic toughened fiber, 2 parts of fluid loss agent, 0.5 part of dispersant, 10 parts of latex anti-migration agent,
65 parts of 1 part of latex stabilizer, 10 parts of nano fluid silicon, 2.8 parts of high temperature retarder, 1.2 parts of antifoaming agent and water.
3. high temperature resistance anti-gas channeling cement system according to claim 1 or 2, which is characterized in that it counts in parts by weight, including
40-210 parts of weighting material.
4. according to claim 1-3 any one of them high temperature resistance anti-gas channeling cement systems, which is characterized in that the cement is main
It is made of tricalcium silicate, dicalcium silicate, tricalcium aluminate and tetra calcium aluminoferrite, grain size is 20-60 μm.
5. according to claim 1-4 any one of them high temperature resistance anti-gas channeling cement systems, which is characterized in that the compound silica flour
By silica flour that grain size is 80 mesh and 180 mesh according to 3：7 ratio mixing obtains.
6. according to claim 1-5 any one of them high temperature resistance anti-gas channeling cement systems, which is characterized in that the inorganic toughening
A diameter of 10-100 μm of fiber.
7. according to claim 1-6 any one of them high temperature resistance anti-gas channeling cement systems, which is characterized in that the fluid loss agent
For AMPS multiple copolymers.
8. according to claim 1-7 any one of them high temperature resistance anti-gas channeling cement systems, which is characterized in that the dispersant is
Sulfonated ketone aldehyde polycondensate.
9. according to claim 1-8 any one of them high temperature resistance anti-gas channeling cement systems, which is characterized in that the latex anti-channeling
Agent is styrene-butadiene latex.
10. according to claim 1-9 any one of them high temperature resistance anti-gas channeling cement systems, which is characterized in that the nano fluid
The density of silicon is 1.37g/cm3, effective solid content 45%, solid particle average grain diameter is 160nm or so, and specific surface area is
23m2/g。
11. according to claim 1-10 any one of them high temperature resistance anti-gas channeling cement systems, which is characterized in that the antifoaming agent
For tbp.
12. high temperature resistance anti-gas channeling cement system according to claim 3, which is characterized in that the weighting material is iron ore
Powder.
13. claim 1-12 any one of them high temperature resistance anti-gas channeling cement system preparation methods, which is characterized in that including such as
Lower step：
(1) cement, compound silica flour, inorganic toughened fiber are uniformly mixed according to a ratio；
(2) by fluid loss agent, dispersant, latex anti-migration agent, latex stabilizer, nano fluid silicon, high temperature retarder, antifoaming agent and water
It is uniformly mixed according to a ratio；
(3) mixture of step (1) is poured slowly into the mixture of step (2), blender is used in combination quickly to stir.
14. high temperature resistance anti-gas channeling cement system preparation method according to claim 13, which is characterized in that the blender
For homogenizer, rotating speed is 4000 revs/min.
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| CN110240441A (en) * | 2019-07-16 | 2019-09-17 | 成都理工大学 | Heat reservori exploits nano material and basalt fibre complex cement base well cementing material |
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| CN113213822A (en) * | 2021-04-26 | 2021-08-06 | 中海石油(中国)有限公司 | Ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry and application thereof |
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| CN113213822A (en) * | 2021-04-26 | 2021-08-06 | 中海石油(中国)有限公司 | Ultrahigh-temperature corrosion-resistant channeling-preventing cement slurry and application thereof |
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