CN107746225A - A kind of low cementing concrete of creeping - Google Patents
A kind of low cementing concrete of creeping Download PDFInfo
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- CN107746225A CN107746225A CN201711022905.9A CN201711022905A CN107746225A CN 107746225 A CN107746225 A CN 107746225A CN 201711022905 A CN201711022905 A CN 201711022905A CN 107746225 A CN107746225 A CN 107746225A
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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
- C04B28/04—Portland cements
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/22—Glass ; Devitrified glass
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
-
- 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
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of low cementing concrete of creeping, belong to oil gas well cementing operation field of material technology, the low cementing concrete of creeping, including following raw material by weight percentage：Portland cement：50~85%；Superfine spherical extra material：5~15%；Flyash：8~30%；Fiber：0.4~1%；Lightening material：0~10%；Dispersant：0.5~1.5%.Present invention mainly solves in the prior art because cement formula design is not reasonable, when causing to use fracturing yield increasing technology in well, Behavior of Hardened Cement Paste produces the technical problem of expendable plasticizing deformation.Selection and specific proportion design of the present invention by raw material, realizing reduces creeping for Behavior of Hardened Cement Paste, reduces plastic deformation.
Description
Technical field
The present invention relates to a kind of cementing concrete, more particularly to a kind of low cementing concrete of creeping, belong to oil gas well cementing operation material
Technical field.
Background technology
Shale gas refers to be stored in the unconventional gas resource in shale formation.Because shale reservoir porosity is extremely low,
Intrinsic fracture agensis, therefore, in the development process of shale gas, it will usually using yield-increasing techniques such as acid fracturings.Using
During staged fracturing technology, high pressure is first produced in inside pipe casing, reservoir rock is destroyed, pour into pressure release after backing material, the process
Cause well interior mechanics environmental abnormality complicated, very high requirement is proposed to the mechanical property of cementing concrete ring.During boosting, cement sheath
The pressure conducted by sleeve pipe, axial compression stress and ring tension are born in inner boundary, and with pressure rise, cement sheath may
Appearance is deformed or destroyed；During release, with the reduction of well head pressure, the deformation of sleeve pipe recovers, and cement sheath is because there is plasticity change
Shape and deformation can not be recovered, cause cement sheath inner boundary and sleeve pipe external boundary to be gradually disengaged, the first interface produce micro- of interannular
Gap, equally annular space microannulus may also be produced in second contact surface, ultimately result in cement sheath seal failure.
In order to reduce the plastic deformation of cement sheath, ensure the sealing integrity in oil gas well construction and production process, at present
, that is, by adding the elastic components such as rubber, latex, water is improved to reduce the modulus of elasticity of cement sheath in main research work direction
The elastic deformability of mud ring, optimize mechanical property, it is expected after pressure release, cement sheath can recover deformation, avoid annular space micro-loop
The generation of gap.But the plastic deformation of cement might not be due to that can just be produced after stress has exceeded the yield strength of cement,
Creep and also result in plastic deformation.Creep and refer to work as a kind of material under load effect, increase and increased deformation with the time,
And the load is less than the yield strength of material.For oil-well cement, when fracturing yield increasing technology is used in well, to protect
Cement sheath integrality is demonstrate,proved, the pressure Many times that Behavior of Hardened Cement Paste is born can't exceed the compression strength of Behavior of Hardened Cement Paste, but this is not
It can guarantee that Behavior of Hardened Cement Paste will not produce plastic deformation.Fracturing work duration exceedes a few houres, under pressure for a long time, Behavior of Hardened Cement Paste
Internal structure can change, including water translocation, gel of calcium silicate mutually slide, the change of pore structure etc., eventually lead
Behavior of Hardened Cement Paste is caused to produce expendable plastic deformation.
It is CN102701654B that State Intellectual Property Office disclosed notification number on October 30th, 2013, entitled " a kind of
The patent of invention of low concrete of creeping ", the concrete is by cement 300-350 parts, metakaolin 20-60 parts, inert filler 70-
150 parts, polycarboxylate water-reducer 6-8 parts, river sand 700-750 parts, rubble 1050-1100 parts and water 120-220 parts mixing composition；Institute
The cement stated is PI52.5 cement；Described low concrete of creeping is more than C40,28d modulus of elasticity>35GPa, 3d creep degree
For 3~9 × 10-6/ MPa, 28d creep degree are 11~21 × 10-6/ MPa, 90d creep degree are 15~26 × 10-6/ MPa, and tend to
It is stable.
The patent is mainly to reduce the purpose crept to improve the faying face of cement-aggregate to reach using metakaolin.
However, due to using inertia admixture, hardly reacted with cement, its interface binding power is weaker, does not reach reduction on the contrary
The purpose crept.In addition, flyash is a kind of volcanic ash extra material, there is certain influence on concrete strength, because flyash is
Industrial by-products, quality is unstable, causes concrete strength to differ greatly.But in cementing slurry, flyash it is main
Effect is to utilize its spherical structure, improves fluidity of slurry, will not influence slurry performance because of its composition transfer, also just be not present
The problem of operability and poor repeatability.Because metakaolin is the Mineral admixture of a kind of cost height, scarcity of resources, by its group
Into concrete be unfavorable for marketing use.
The content of the invention
Present invention seek to address that cause to use fracturing yield increasing in well because cement formula design is not reasonable in the prior art
During technology, Behavior of Hardened Cement Paste produces the technical problem of expendable plasticizing deformation, there is provided a kind of low cementing concrete of creeping, passes through change
Cementing concrete hydrated product institutional framework, the Creep Characteristics of Behavior of Hardened Cement Paste are reduced, reduce plasticity of the Behavior of Hardened Cement Paste in pressing crack construction and become
Shape, improve wellbore integrity.
In order to realize foregoing invention purpose, technical scheme is as follows：
A kind of low cementing concrete of creeping, it is characterised in that：Including following raw material by weight percentage：
Portland cement：50~85%；
Superfine spherical extra material：5~15%；
Flyash：8~30%；
Fiber：0.4~1%；
Lightening material：0~10%；
Dispersant：0.5~1.5%.
In order to which the present invention is better achieved, further, the portland cement is in A levels, G levels or H level oil-well cements
One kind.
In the present invention, the superfine spherical extra material has pozzolanic activity material, and its microstructure is spherical shape, ultra-fine
Spherical extra material has pozzolanic reaction activity, not only can be with the Ca (OH) in hydrated product2Reaction, while can be coagulated with calcium silicates
Glue react, formed between ball particle surface and hydrated product it is strong link, pass through particle shape effect prevent sliding
The generation of phenomenon.Meanwhile superfine spherical extra material can play " ball " effect in slurry, be advantageous to improve the flowing of slurry
Property, reduce water requirement.
In the present invention, a diameter of 0.4~5000 nm of the superfine spherical extra material.
In the present invention, the lightening material is hollow glass micropearl.
In the present invention, further, the density of the hollow glass micropearl is 0.38~0.6g/cm3, anti-isostatic pressing strength >=
40Mpa。
Low cementing slurry of creeping has the feature of low water-cement ratio, and the ratio of mud, which reduces, will influence the density of slurry, and density
It is one of cementing slurry important parameter, in order to ensure the stability on stratum, usually requires that cementing concrete pulp density is fixed on one
Determine scope.When therefore reducing the ratio of mud, it is necessary to it is corresponding to mix corresponding lightening material, and hollow glass micropearl is a kind of good
Density lightening material, while its spherical structure is also beneficial to improve fluidity of slurry.
In the present invention, the flyash is the former ash of non-powder grinding, is spheroidal or approximate spheroidal, flyash is coal dust
High-temp combustion is cooled into, and in high temperature because surface tension effects form spherical structure, while inside has a large amount of holes, makes
It possesses reduction slurry density, increases the effect of fluidity of slurry.
In the present invention, enter a ground, a diameter of 1~40 μm of the flyash.
In the present invention, the fiber is one kind in basalt fibre, alkali-resistant glass fibre, and both fibers are inorganic fibre
Dimension, there is good compatibility, the active force that increase fibne pull-out needs with hydrolysis product of cement.Made by the connection of fiber
With can effectively lower the mutual slipping of hydrated calcium silicate gel, reduce the deformation of creeping of Behavior of Hardened Cement Paste.
The length of the fiber is 0.4~0.8mm.
In the present invention, the dispersant is polycarboxylic acids dispersant with high efficiency.
Beneficial effects of the present invention：
（1）The present invention forms annulus in fracturing yield increasing for cementing concrete ring and proposes new explanation, opens on this basis
Low cementing concrete of creeping has been sent out, the formula of cementing concrete has been redesigned, has prevented to slide using superfine spherical extra material
Move phenomenon；The overall density of cement mortar is controlled in required scope using lightening material；Again by adding special ratios
Fiber increase the active force required for drawing, reduce the deformation of creeping of Behavior of Hardened Cement Paste.Pass through the raw material in inventive formulation
Selection and specific Proportionality design, each raw material cooperate, and there is plasticizing deformation of the smaller cement also under stress to make
With improving the integrality of cement sheath, solve long-term unsolved technical problem present in prior art.In addition, selecting
On material, superfine spherical extra material, flyash are ball shape, and the powder material of ball shape can be greatly in construction
Improve the mobility of cement mortar, ensure that the rheological property that cement mortar is good under the conditions of low water-cement ratio, and coordinate special ratios
Dispersant further improve the fluidity of cement mortar, realize the good workability of low cement of creeping of the present invention and apply
Work efficiency fruit.
（2）In the present invention, preferably, a diameter of 0.4~5000 nm of superfine spherical extra material, such extra material by
It is smaller in particle, there is filing effect, cement strength can be effectively improved, simultaneously as structure spherical in shape, has ball effect
Should, and specific surface area is lower, is advantageous to improve the mobility of slurry, offsets because the ratio of mud reduces the negative effect brought.
（3）In the present invention, preferably, the fiber is one kind in basalt fibre, alkali-resistant glass fibre, such is fine
Tie up as inorfil, except forming mechanical snap effect between Behavior of Hardened Cement Paste, while it is anti-that certain chemistry can be formed with Behavior of Hardened Cement Paste
Should, chemical bond is formed, improves humidification of the fiber in Behavior of Hardened Cement Paste, can effectively reduce the creep effects of Behavior of Hardened Cement Paste.
（4）In the present invention, preferably, dispersant is polycarboxylic acids dispersant with high efficiency, the dispersant has good disperse
Effect, while there is efficient water-reduction, under conditions of oil well cement paste reduces the ratio of mud, it can effectively ensure that the stream of slurry
Dynamic property, the workability of cement mortar is not influenceed.
Embodiment
The present invention is described in further detail with reference to embodiment, but the implementation of the present invention is not limited to this.
Embodiment 1
A kind of low cementing concrete of creeping, is made up of following raw material by weight percentage：Portland cement： 85%；Ultra-fine ball
Shape extra material：5%；Flyash：9%；Fiber：0.5%；Dispersant：0.5%.
Portland cement in the present embodiment is G level oil-well cements；
Superfine spherical extra material in the present embodiment has pozzolanic activity, its diameter 0.4~5000 nm；
Flyash in the present embodiment is the former ash of non-grinding, a diameter of 1~40 μm；
The fiber of the present embodiment is basalt fibre, length 0.4mm；
The dispersant of the present embodiment is high-efficiency water-reducing agent of poly-carboxylic acid.
The low cementing concrete of creeping of the present embodiment is in work progress, the ratio of mud 0.35, slurry density 1.90g/
cm3。
Embodiment 2
A kind of low cementing concrete of creeping, is made up of following raw material by weight percentage：Portland cement： 65.5%；It is ultra-fine
Spherical extra material：10%；Flyash：20%；Fiber：0.7%；Lightening material：3%, dispersant：0.8%.
Portland cement in the present embodiment is H level oil-well cements；
Superfine spherical extra material in the present embodiment has pozzolanic activity, its diameter 0.4~5000 nm；
Flyash in the present embodiment is the former ash of non-grinding, a diameter of 1~40 μm；
Lightening material in the present embodiment is hollow glass micropearl, and its density is 0.6g/cm3, anti-isostatic pressing strength 40Mpa.
The fiber of the present embodiment is basalt fibre, length 0.6mm；
The dispersant of the present embodiment is high-efficiency water-reducing agent of poly-carboxylic acid.
The low cementing concrete of creeping of the present embodiment is in work progress, the ratio of mud 0.35, slurry density 1.80g/
cm3。
Embodiment 3
A kind of low cementing concrete of creeping, is made up of following raw material by weight percentage：Portland cement： 50%；Ultra-fine ball
Shape extra material：15%；Flyash：22.7%；Fiber：0.8%；Lightening material：10%, dispersant：1.5%.
Portland cement in the present embodiment is A level oil-well cements；
Superfine spherical extra material in the present embodiment has pozzolanic activity, its diameter 0.4~5000 nm；
Flyash in the present embodiment is the former ash of non-grinding, a diameter of 1~40 μm；
Lightening material in the present embodiment is hollow glass micropearl, and its density is 0.38g/cm3, anti-isostatic pressing strength 40Mpa.
The fiber of the present embodiment is basalt fibre, length 0.8mm；
The dispersant of the present embodiment is high-efficiency water-reducing agent of poly-carboxylic acid.
The low cementing concrete of creeping of the present embodiment is in work progress, the ratio of mud 0.42, slurry density 1.65g/
cm3。
Embodiment 4
A kind of low cementing concrete of creeping, is made up of following raw material by weight percentage：Portland cement： 54%；Ultra-fine ball
Shape extra material：10%；Flyash：30%；Fiber：1%；Lightening material：4%, dispersant：1%.
Portland cement in the present embodiment is A level oil-well cements；
Superfine spherical extra material in the present embodiment has pozzolanic activity, its diameter 0.4~5000 nm；
Flyash in the present embodiment is the former ash of non-grinding, a diameter of 1~40 μm；
Lightening material in the present embodiment is hollow glass micropearl, and its density is 0.6g/cm3, anti-isostatic pressing strength 40Mpa.
The fiber of the present embodiment is basalt fibre, length 0.8mm；
The dispersant of the present embodiment is high-efficiency water-reducing agent of poly-carboxylic acid.
The low cementing concrete of creeping of the present embodiment is in work progress, the ratio of mud 0.40, slurry density 1.70g/
cm3。
Embodiment 5
The preparation method of the cementing concrete of embodiment 1 ~ 4 is as follows：
Component described in embodiment is well mixed, and cement mortar is prepared according to standard GB10238, slurry is then poured into 50 × 50
×50cm3Die trial in, be put into 50 DEG C of ordinary pressure curing case, conserve 1d after be stripped, test block is put into curing box and continues to conserve, coagulate
Phase proceeds by detection when being 7d.
Embodiment 6
For the cementing concrete of embodiment 1 ~ 4, the compression strength and Creep Characteristics of detector Behavior of Hardened Cement Paste, and with common G levels oil well
Cement（Control:1st, control group 2）Contrasted, it is as a result as shown in table 1 below：
Table 1：
From testing result as can be seen that there is higher compression strength and relatively low plasticity according to cement made from inventive formulation
Deflection, the integrality of pit shaft can be effectively improved.
It should be noted that：Control group 1：G levels oil-well cement 100%, the ratio of mud 0.44, cement slurry density 1.90g/cm3；
Control group 2：G levels oil-well cement 100%, the ratio of mud 0.44, cement slurry density 1.65g/cm3.Two kinds of cement slurries with other realities
Apply and conserve and detect under the same terms.
Above-mentioned amount of plastic deformation（Cement Creep Characteristics）Detection method it is as follows：Test block is put on pressure machine platform,
Test model is constant voltage mode on computer, and sets test pressure and constant voltage time, every group of sample respectively 25KN, 50KN,
Pressure release after constant pressure 2h at tri- force value of 70KN, test block change in size is detected using micrometer.
Result computational method of creeping is：
Plastic deformation value ɑ=(L1-L2)/L1
Wherein：L1：Test block pressure-bearing surface raw footage；L2：Length of the test block pressure-bearing surface after pressure-bearing terminates.
Claims (9)
- A kind of 1. low cementing concrete of creeping, it is characterised in that：Including following raw material by weight percentage：Portland cement：50~85%；Superfine spherical extra material：5~15%；Flyash：8~30%；Fiber：0.4~1%；Lightening material：0~10%；Dispersant：0.5~1.5%.
- 2. low cementing concrete of creeping as claimed in claim 1, it is characterised in that：The portland cement is A levels, G levels or H levels One kind in oil-well cement.
- 3. low cementing concrete of creeping as claimed in claim 1 or 2, it is characterised in that：The diameter of the superfine spherical extra material For 0.4~5000 nm.
- 4. low cementing concrete of creeping as claimed in claim 1, it is characterised in that：The lightening material is hollow glass micropearl.
- 5. low cementing concrete of creeping as claimed in claim 4, it is characterised in that：The density of the lightening material be 0.38~ 0.6g/cm3, anti-isostatic pressing strength >=40MPa.
- 6. low cementing concrete of creeping as claimed in claim 1, it is characterised in that：The flyash is the former ash of non-grinding.
- 7. the low cementing concrete of creeping as described in claim 1 or 7, it is characterised in that：A diameter of 1~40 μ of the flyash m。
- 8. low cementing concrete of creeping as claimed in claim 1, it is characterised in that：The fiber is basalt fibre, alkaline-resisting glass One kind in glass fiber, length are 0.4~0.8mm.
- 9. low cementing concrete of creeping as claimed in claim 1, it is characterised in that：The dispersant is polycarboxylic acids high efficiency dispersion Agent.
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| CN201711022905.9A CN107746225A (en) | 2017-10-27 | 2017-10-27 | A kind of low cementing concrete of creeping |
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| CN201711022905.9A CN107746225A (en) | 2017-10-27 | 2017-10-27 | A kind of low cementing concrete of creeping |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111395993A (en) * | 2020-02-11 | 2020-07-10 | 中国石油天然气集团有限公司 | Method for controlling fracturing deformation of horizontal casing of shale gas well |
| CN113698919A (en) * | 2020-05-22 | 2021-11-26 | 中石化石油工程技术服务有限公司 | Thixotropic gelling system suitable for adjusting well cementation in old oil zone |
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| US20090158968A1 (en) * | 2007-12-21 | 2009-06-25 | Icrete, Llc | High workability and high strength to cement ratio |
| CN106007545A (en) * | 2016-06-06 | 2016-10-12 | 中国石油集团长城钻探工程有限公司固井公司 | Cement slurry with long-term-integrity cement sheath for heavy-oil thermal-recovery well and preparation method thereof |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20090158968A1 (en) * | 2007-12-21 | 2009-06-25 | Icrete, Llc | High workability and high strength to cement ratio |
| CN106007545A (en) * | 2016-06-06 | 2016-10-12 | 中国石油集团长城钻探工程有限公司固井公司 | Cement slurry with long-term-integrity cement sheath for heavy-oil thermal-recovery well and preparation method thereof |
Non-Patent Citations (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110240441B (en) * | 2019-07-16 | 2020-03-20 | 成都理工大学 | Nano material and basalt fiber composite cement-based well cementing material for heat reservoir exploitation |
| CN111395993A (en) * | 2020-02-11 | 2020-07-10 | 中国石油天然气集团有限公司 | Method for controlling fracturing deformation of horizontal casing of shale gas well |
| CN113698919A (en) * | 2020-05-22 | 2021-11-26 | 中石化石油工程技术服务有限公司 | Thixotropic gelling system suitable for adjusting well cementation in old oil zone |
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