CN105733519B - Hydrophily paraffin microcapsule strong low hydration heat cement system early - Google Patents
Hydrophily paraffin microcapsule strong low hydration heat cement system early Download PDFInfo
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- CN105733519B CN105733519B CN201610242980.5A CN201610242980A CN105733519B CN 105733519 B CN105733519 B CN 105733519B CN 201610242980 A CN201610242980 A CN 201610242980A CN 105733519 B CN105733519 B CN 105733519B
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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
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/06—Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice versa
- C09K5/063—Materials absorbing or liberating heat during crystallisation; Heat storage materials
-
- 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
- C04B28/06—Aluminous 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
- C09K8/473—Density reducing additives, e.g. for obtaining foamed cement compositions
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
- C04B2103/0071—Phase-change materials, e.g. latent heat storage materials used in concrete compositions
Abstract
The invention discloses a kind of hydrophily paraffin microcapsule and for the early strong low hydration heat cement system of low temperature well cementing, cement system is comprised the following components in parts by weight: silicate-aluminate complex cement, and mass ratio is 3:7~5:5, and 100 parts；5 ~ 10 parts of decalescence material；10 ~ 25 parts of density lightening material；58.2 ~ 77.2 parts of water.The present invention has following excellent properties: (1) early strength is high, and compared with conventional G grades of oil-well cement system, early powerful feature is excellent under the system low temperature；(2) hydration heat amount is low, and the system more conventional G grades of oil-well cement system of system temperature rise that hydration heat amount and hydration heat generate in the test of hydration heat for 24 hours is all low, this advantageously ensures that the stability of deep water stratum hydrate；(3) system and early strength agent, retarder compatibility are good.
Description
Technical field
A kind of morning strong low hydration heat cement system the present invention relates to hydrophily paraffin microcapsule and for low temperature well cementing,
It is a kind of especially suitable for deep-water low-temperature, hydrate layer cementing cement system, is also applied for the well cementing operation of frost hydrate layer.
The invention belongs to oil gas well cementing operation Material Fields.
Background technique
As the definition of scientific and technological progress deep water constantly changes, generally believe that region of the depth of water greater than 500m is deep at present
Water area.Demand sustainable growth of the countries in the world to petroleum resources in recent years, deep water hydrocarbon resource become the heat of various countries' exploitation
Point.
Deep water has petroleum resources abundant, and global deep water is contained more than 1000 × 108The petroleum resources of t, verify oil
Gas reserves are about 380 × 108T accounts for about the 34% of Global Oil and Gas Resources total amount.Deep water hydrocarbon discovery accounts for global Oil Gas discovery total amount
It is constantly soaring, global Oil Gas discovery total amount, which is accounted for, in 2002~2003 years deep water hydrocarbon discovery amounts is up to 65%.Currently, having had more than
100 countries carry out marine oil and gas exploration and development work, at present the West Africa off coast of Atlantic Ocean two sides, bank Persian basin and
The Gulf of Mexico has become the hot zones of 3 deep-water explorations.The Angola in West Africa and many new oil fields of Niger Delta are thrown
Enter exploitation, external oil company has explored out 46 deepwaters in Angola successively, and Niger area is even more to explore out
10×108The deepwater of t shares 17 deep water hydrocarbon fields in 2000~2005 years West Africa according to statistics and goes into operation；Brazil 2000
The petroleum daily output 17.8 × 104T, the depth of water contribute to 70% yield in the deep water hydrocarbon field of 400~2000m；The Gulf of Mexico
Deep water hydrocarbon yield has reached 0.37 × 10 within 20008t.In addition to above hot zones South Africa, Argentina, Britain, Norway, add
It puts on airs, Australia, New Zealand waited and all carrying out deepwater petroleum exploration development.Deep water oil of the China at the South Sea in recent years
Gas exploration development is also actively being unfolded.
There is many challenges during deepwater development, wherein the well cementation of highly effective and safe is exactly that pendulum is huge in face of developer
One of hang-up.As the low temperature environment of deep water, shallow seated groundwater-flow of air, low formation fracture pressure, gas hydrates presence,
The unfavorable factors such as high rental expenses become the huge challenge that deep water cementing faces: (1) conventional cementing cement system ingredient
Generally based on dicalcium silicate and tricalcium silicate, however both ingredients are when environment temperature is lower than 5 DEG C almost without aquation energy
Power, and deepwater seabed temperature is generally at 4 DEG C, it is minimum can be to 0 DEG C, this can greatly extend well construction period and shaft building expense；(2) deep water
The non-cementation of shallow-layer makes that the formation fracture pressure of shallow stratum is low, strata pressure is high, the Density Window of cementing slurry
It is narrow, it is necessary to the density palliative that cannot participate in hydration reaction be added using low-density cement mortar, cause the strong of opposite Behavior of Hardened Cement Paste
Degree increases slow and low problem；(3) process of hydrated cementitious condensation is exothermic reaction, be easy to cause the decomposition of hydrate, causes
Borehole diameter expands, generates has channeling, influences the problems such as mud replacement efficiency, finally impacts to cementing quality.In addition, natural
The decomposition of gas hydrate also will cause abnormal high pressure, generate blowout even well kick accident.Especially deep water shallow-layer hydrate layer
Sealing facing challenges are more severe --- it is required that cement system has low-temperature high-early strength, low hydrated reaction heat.
Currently, the deep water cementing cement system studied both at home and abroad has: (1) grain composition cement system；(2) foamed cement body
System；(3) quick-hardening cement system；(4) the slag system of physics and chemi-excitation；(5) gypsum system is coagulated fastly；(6) aluminium sulfate and G
Class g cement compound system etc..Grain composition cement system has certain hydration capability at low temperature, but its cost is relatively
It is high；Complicated equipment is needed in foamed cement system work progress, this is a challenge, meeting for originally narrow drilling platforms
Increase logistic work difficulty；Strength development is very fast under quick-hardening cement system low temperature, but system can discharge huge heat, this is right
It is extremely disadvantageous in the stability of gas hydrates；Slag system early strength with higher in 10 DEG C of environment of low temperature, but
It is that early strength in 0~4 DEG C of environment is not high and slag system does not account for the requirement of low hydration heat, system is in physics and chemistry
The higher heat of hydration can be discharged under activation；Preferable low-temperature high-early strength performance is presented at 15 DEG C for solidifying gypsum system fastly, still
The early epistasis for coagulating gypsum system fastly in 5 DEG C or so of environment can be bad；The aluminium sulfate and G class g cement of Wang Chengwen et al. research
Compound system has good low-temperature high-early strength characteristic, but system hydration heat is higher, is unfavorable for the stabilization of gas hydrates.
Gas hydrates are not considered mostly to the research of deep water cementing both at home and abroad, however more and more researches show that natural gas is hydrated
The presence of object is a huge security risk for deep water cementing.Studies have shown that gas hydrates are steady under the conditions of 10MPa
Fixed existing temperature is no more than 18 DEG C, and 1mol gas hydrate dissociation can generate 100L or so at the standard conditions
Gas.The decomposition of gas hydrates may induce well kick even gas blowout accident.Studies have shown that G grades of oil-well cements are at 20 DEG C
Hydration heat temperature can achieve 80 DEG C or so in atmospheric environment, and common reduction heat of hydration extra material flyash, slag is added
Etc. material results it is unobvious, can only also G class g cement petrochemical industry heat release be reduced to 65 DEG C or so in the case of 30% volume by mixing, and
Extra material adversely affects the compression strength of system；Aluminate cement hydration heat temperature in 20 DEG C of atmospheric environments can reach
To 110 DEG C or so.And common deep water cementing cement system domestic and international at present is all based on G class g cement and aluminate cement etc. and changes
Into formula, these systems all do not account for the detrimental effect that hydration heat temperature generates hydrate stability.Therefore, conventional
Deep water cementing cement system hydration heat temperature is far more than gas hydrate dissociation temperature, for gas hydrates stability
It is huge threat.
Hydrated cementitious heat release is controlled, phase-change material is usually added into cement slurry.However, on how to reduce oil well water
During muddy water the research of exothermic phase-change material seldom, the phase-change material towards building building cement have in recent years some researchs at
Fruit.Li Wei et al. uses suspension polymerization to be prepared for using n-octadecane as core material, styrene-neopentylglycol diacrylate copolymerization
Object is the phase-change material micro-capsule of shell material, and phase-change material micro-capsule pattern obtained is complete, good dispersion (Li Wei, Zhang
Xing xiang,You Ming.Fabrication of microencapsulated/nanoencapsulated phase
change materials using suspension polymerization[J].Polym Mater Sci Eng,2010,
26 (2): 36~39)；Zhang Xue waits people quietly and is prepared for by miniemulsion interfacial polymerization with n-octadecane as PCM, polyureas and poly-
Styrene is the double-deck Na capsule (Zhang Xuejing, the Wang Jianping, Zhang of wall material
Xingxiang.Preparation of double shell nanoencapsulated phase change materials
by interfacial polymerization in an emulsion system[J].New Chem Mater,2011,39
(1):45-49)；Appoint dawn it is bright et al. use situ aggregation method using lauryl alcohol as core material, melamine-formaldehyde is shell material (Ren
Xiaoliang,Wang Lixin,Ren Li,et al.Preparation of phase change materials
microcapsules by in-situ polymerization[J].J Funct Mater,2005,36(11):1722-
1727.) having studied core shell influences the performances of phase-change thermal storage microcapsules than, emulsification revolving speed, although prepared microcapsules store
Hot property is excellent, but because core material is expensive, causes the carrying cost of unit thermal energy to rise, and with melamine-formaldehyde tree
Rouge, Lauxite be shell material preparation microcapsules in use can the pernicious gases such as release formaldehyde be detrimental to health, this
It is all the main problem for hindering its scale application a bit.Paraffin is more commonly used phase-change material, but since paraffin belongs to oil
Phase will be assembled and be separated in water phase, and cement slurry can not be directly applied to.Paraffin is applied to cement slurry at present, usually
First paraffin is absorbed using porous material, then again by porous material and cement mixing, the porous material of use is generally diatom
Soil and perlite, but this belongs to physical absorption, part paraffin still will appear poly- and segregation phenomenon.So this method is not
It can apply to in the exigent casing and cementing of cement slurry property.Other existing methods are mixed in paraffin using organic monomer
It closes, then carries out suspension polymerisation, synthesize paraffin microcapsule, paraffin is scattered in the rack after organic monomer polymerization, such method
Preferably control paraffin it is poly- simultaneously, but synthesize paraffin microcapsule be difficult to disperse in water phase.Zhang Qiuxiang et al. is with paraffin
For core material, methyl methacrylate-acrylic acid copolymer is shell material, and nano silica is that modifying agent uses in-situ polymerization legal system
Standby paraffin microcapsule phase change energy storage material, but the microcapsules of this method synthesis are there are agglomeration, and synthesis technology phase
To complexity, (Zhang Qiuxiang, Chen Jianhua, Lu Hongbin wait the research of the nano-silicon dioxide modified paraffin microcapsule phase change energy storage material of
[J] macromolecule journal, 2015 (6): 692-698.).
Currently, the research of domestic deep water cementing cement system primarily directed to no hydrate there are the case where.For depth
The research of the cementing cement system of water hydrate layer is very few.For low temperature and the natural gas hydration for solving the well cementation of deep water hydrate layer
Object resolution problem, developing the novel early strong low hydration heat cement system for low temperature well cementing of one kind has important meaning
Justice.
Summary of the invention
The object of the present invention is to provide a kind of early strength height, hydration heat amount are low, low density suitable for deep water hydration
The cementing cement system of nitride layer.
The specific technical solution that the present invention solves the technical problem is:
Present invention firstly provides a kind of phase-change material with endothermic character, that is, paraffin microcapsule (hereinafter referred PCM), system
Preparation Method: the bright olefin(e) acid formicester of methyl, benzoyl peroxide, divinylbenzene, melt paraffin being uniformly mixed and form oily phase, then will
Nano silica and deionized water stir very bell at water phase in 75 DEG C；Above-mentioned oil is mutually slowly imported in water phase, 85
DEG C heating water bath, 2000 revs/min can be prepared by paraffin microcapsule of the invention in high-speed stirred 2 hours；Wherein the methyl is bright
Olefin(e) acid formicester, benzoyl peroxide, divinylbenzene, paraffin, nano silica, water mass ratio be 100:3:0.5:100:
16:1000。
The paraffin melting point is 40 DEG C.
The hydrophily paraffin microcapsule of above-mentioned preparation method preparation.
Application of the above-mentioned hydrophily paraffin microcapsule in control hydrated cementitious heat release.
The present invention also provides a kind of early strong low hydration heat cement system formula for low temperature well cementing, feature exists
In the formula comprises the following components in parts by weight:
Silicate-aluminate complex cement, mass ratio be 3:7~5:5,100 parts；
5~10 parts of decalescence material；
10~25 parts of density lightening material；
58.2~77.2 parts of water.
According to the early powerful feature under aluminate cement low temperature, there is stronger hydration capability at 0 DEG C, to G grades of oil wells
Aluminate cement is added in cement, improves the hydration capability of cement system at low temperature, obtains higher morning intensity under low temperature,
Furthermore micro-expansion characteristics guarantees to cement the well cementing aluminate cement so that will not shrink under cement system low temperature at low temperature
Quality avoids the generation of microannulus.Cement system of the invention is G grades of oil well cementing cement-aluminate cement mixtures
System, the introducing of aluminate can make up the G class g cement excessively slow disadvantage of hydration reaction rate at low temperature, improve early strength.G grades
The introducing of cement can make whole system on the basis of maintaining early strength, and hydration heat is lower than fine aluminium acid salt cement system.
The mass ratio of silicate-aluminate complex cement is 5:5 in preferred.
Low hydration heat deep water cementing cement system of the invention is in use, mix 5~10 parts of phase-change material, that is, paraffin
Microcapsules absorb the thermal discharge during the characteristic reduction system hydration reaction of heat when undergoing phase transition using paraffin microcapsule,
Guarantee the density that the stability of gas hydrates utilizes the low-density characteristic of paraffin microcapsule to reduce system simultaneously.It is preferred that go out
5 parts~10 parts of phase-change material dosage.
Density lightening material of the invention is hollow glass floating bead.The hollow float bead originates from Ma'an Mountain of Sinosteel Corporation mine and grinds
Study carefully institute, model Y-12000, real density 0.80g/cm3, compression strength 82.75MPa, 35 μm of median diameter.
Early-strength low hydration heat deep water cementing cement system is in use, the glass of 0~25 parts by weight can be mixed
Floating bead, water-solid ratio 0.506~0.572 can make 1.36~1.81g/cm of density3Low-density cement mortar.Being used for for obtaining is low
The ratio of mud of the early strong low hydration heat cement system of temperature well cementation is 0.506~0.572.
A kind of early strong low hydration heat cement system for low temperature well cementing of the invention has following excellent properties:
(1) early strength is high, and compared with conventional G grades of oil-well cement system, early powerful feature is excellent under the system low temperature.
(2) hydration heat amount is low, and the system hydration heat amount and hydration heat in the test of hydration heat for 24 hours generate
The more conventional G grades of oil-well cement system of system temperature rise is all low, this advantageously ensures that the stability of deep water stratum hydrate.
(3) system and early strength agent, retarder compatibility are good.
Detailed description of the invention
Fig. 1 is the micrograph (× 30) of phase-change material of the invention；
Fig. 2 is the micrograph (× 220) of phase change paraffin microcapsules of the invention；
Fig. 3 is the early strong low hydration heat cement system hydration reaction test temperature curve graph for 24 hours for low temperature well cementing；
Fig. 4 is the viscous resistance performance test consistency curve of the early strong low hydration heat cement system for low temperature well cementing.
Specific embodiment
Embodiment 1, a kind of hydration heat performance of the early strong low hydration heat cement system for low temperature well cementing of the present invention
Evaluation
Hydrating heat measuring is tested cement and will be formulated:
G class g cement formula: 100 parts of good China G+44 parts of water of class g cement；
Quick-hardening cement formula: 100 parts of essence CA-50+44 parts of water of aluminate cement；
Silicate-aluminate complex cement formula :+50 parts of essence CA-50+44 parts of water of aluminate cement of 50 parts of G class g cements；
LTC cement system formula :+10 parts of PCM+25 parts of floating bead of+70 parts of essence CA-50 aluminate cements of 30 parts of G class g cements+
77.2 part water；
Wherein: the mineral composition and mass percent of 30 parts of victory+70 parts of essence CA-50 aluminate cements of Weihe River G class g cement are as follows:
Aluminium oxide 42.6%, calcium oxide 40.3%, silica 9.5%, iron oxide 2.1%, titanium oxide 2%, sulfur trioxide 1.3%,
Magnesia 1.1%, surplus are microelement.
The wherein preparation method of PCM (hydrophily paraffin microcapsule), comprising the following steps: by the bright olefin(e) acid formicester of methyl, mistake
Benzoyl Oxide, divinylbenzene, melt paraffin, which are uniformly mixed, forms oily phase, then by nano silica and deionized water 75
It is stirred at low speed in DEG C very bell at water phase；Above-mentioned oil is mutually slowly imported in water phase, 85 DEG C of heating water baths, 2000 revs/min
It can be prepared by paraffin microballoon of the invention within high-speed stirred 2 hours；The wherein bright olefin(e) acid formicester of the methyl, benzoyl peroxide, two
Vinyl benzene, paraffin, nano silica, water mass ratio be 100:3:0.5:100:16:1000.Its micrograph such as Fig. 1, figure
Shown in 2.
Prove: prepared PCM does not have agglomeration, and dispersion is easy in water phase.
From Fig. 1, Fig. 2 can be seen that preparation paraffin microcapsule sphericity is good, epigranular, well dispersed existing without reuniting
As, since nano silica is there are microcapsules favorable dispersibility in water in microcapsules use process, do not occur with
The incompatible phenomenon of water.
Cement slurry is prepared according to API 10B-3-2004 standard, utilizes cement system hydration heat in direct method measurement for 24 hours
And hydration heat process is indicated with exotherm form.The low hydration heat deep water cementing cement system of the comparison present invention and G grades of oil
Well cement system, quick-hardening cement system hydration heat curve, test result are shown in Fig. 3 (test condition: normal pressure, 20 DEG C of constant temperature rings
Border).Test result shows that interior hydration heat amount, hydration heat generate the low hydration heat deep water cementing cement system of the present invention for 24 hours
Temperature peak be much smaller than G grades of oil-well cement systems, hydrated blended cement system, the thermal discharge of quick-hardening cement system and hydration heat temperature
Peak value is spent, good low hydration heat characteristic is showed, advantageously ensures that the stability of gas hydrates in well cementing process, keep away
Exempt from gas hydrate dissociation bring well cementation accident.
Embodiment 2, a kind of low temperature compressive property of the early strong low hydration heat cement system for low temperature well cementing of the present invention
Evaluation
Water at low temperature mudstone compression strength tests cement-slurry method:
G class g cement formula: 100 parts of good China G+44 parts of water of class g cement；
Silicate-aluminate complex cement formula :+50 parts of essence CA-50+44 parts of water of aluminate cement of 50 parts of G class g cements；
LTC cement system formula :+10 parts of PCM+25 parts of floating bead of+70 parts of essence CA-50 aluminate cements of 30 parts of G class g cements+
77.2 part water；
Cement slurry is prepared according to API 10B-3-2004 standard, is resisted under measurement cement slurry density, different temperatures curing condition
Compressive Strength, and be compared with G grades of oil-well cement compression strength, test result is shown in Table 1.Test result shows of the invention low
The compression strength of hydration heat deep water cementing cement system at low temperature shows excellent low temperature morning much higher than G grades of oil-well cements
Powerful feature；System density is set to be reduced to 1.36g/cm in incorporation glass pearl3It is strong still to show excellent morning for system later
Performance.
Table 1
Embodiment 3, the early strength agent early strong low hydration heat cement system crushing resistance for low temperature well cementing a kind of to the present invention
It can influence evaluation
LTC# formula :+10 parts of PCM+25 parts of glass pearl of+70 parts of essence CA-50 aluminate cements of 30 parts of G class g cements+
77.2 parts of water+early strength agent, density 1.36g/cm3
Cement slurry is prepared according to API 10B-3-2004 standard, the cement system that different early strength agent are added in measurement is supported in difference
Compression strength at a temperature of shield, test result are shown in Table 2.Test result shows triethanolamine, LiClH2O puts the low aquation of the present invention
Hot deep water cementing cement system has apparent early powerful feature and good with system compatibility.
Table 2
Embodiment 4, the thickening of the retarder early strong low hydration heat cement system for low temperature well cementing a kind of to the present invention
Performance influences evaluation
It is formulated 1:30 parts of+10 parts of PCM+25 parts+77.2 parts of glass pearl of essence CA-50 aluminate cements of+70 parts of G class g cement
Water (no retarder)
It is formulated 2:30 parts of+10 parts of PCM+25 parts+77.2 parts of glass pearl of essence CA-50 aluminate cements of+70 parts of G class g cement
Water+retarder, density 1.36g/cm3
Cement slurry is prepared according to API 10B-3-2004 standard and measures the thickening that the cement slurry ties up in 15 DEG C of environment
Time, research shows that the circulating temperature of cement slurry is 15 DEG C or so during deep water cementing, and cement slurry is in 15 DEG C of environment
It is extremely sensitive to temperature that system is thickened performance, therefore selects 15 DEG C to be thickened performance test temperature for system, and formula 1 is in 15 DEG C of environment
In fluid ability is just lost within several minutes, 2 test results of formula are shown in Table 3, Fig. 4.Test result shows that boric acid is slow as system
Solidifying agent, LiClH2O is as system early strength agent, thickening time 189min when boric acid dosage is 0.35 part, consistency 30~100Bc mistake
Time 15min is crossed, is less than 30min, good short transient time performance is presented.
Table 3
Although an embodiment of the present invention has been shown and described it can be managed with comparative example, those skilled in the art
Solution: without departing from the principle and spirit of the present invention can to these embodiments carry out it is a variety of variation, modification, replacement and
Modification, the scope of the present invention are defined by the claims and their equivalents.
Claims (4)
1. a kind of early strong low hydration heat cement system for low temperature well cementing, it is characterised in that: the formula includes following weight
The component of part:
Silicate-aluminate complex cement, mass ratio be 3:7~5:5,100 parts；
5~10 parts of decalescence material；
10~25 parts of density lightening material；
58.2~77.2 parts of water；
The decalescence material is paraffin microcapsule；It is prepared by the following method to obtain: by methyl methacrylate, mistake
Benzoyl Oxide, divinylbenzene, melt paraffin, which are uniformly mixed, forms oily phase, then by nano silica and deionized water 75
It is stirred in DEG C very bell at water phase；Above-mentioned oil is mutually slowly imported in water phase, 85 DEG C of heating water baths, 2000 revs/min of high speeds
Stirring can be prepared by paraffin microcapsule in 2 hours；The wherein methyl methacrylate, benzoyl peroxide, divinylbenzene, stone
Wax, nano silica, water mass ratio be 100:3:0.5:100:16:1000；
The density lightening material is hollow glass floating bead.
2. the early strong low hydration heat cement system according to claim 1 for low temperature well cementing, it is characterised in that: be by
What the group of following parts by weight was grouped as: 30 parts of G class g cements, 70 parts of essence CA-50 aluminate cements, 10 parts of paraffin microcapsules, 25
Part hollow glass floating bead, 77.2 parts of water；
" the G class g cement " is the portland cement in " silicate-aluminate complex cement ".
3. the early strong low hydration heat cement system according to claim 1 for low temperature well cementing, it is characterised in that: be by
What the group of following parts by weight was grouped as: 30 parts of G class g cements, 70 parts of essence CA-50 aluminate cements, 10 parts of paraffin microcapsules, 25
Part hollow glass floating bead, 77.2 parts of water, early strength agent, density 1.36g/cm3；
The early strength agent is triethanolamine or LiClH2O；The dosage of triethanolamine is 0.06 part or 0.10 part；LiCl·H2O's
Dosage is 1 part；
" the G class g cement " is the portland cement in " silicate-aluminate complex cement ".
4. the early strong low hydration heat cement system according to claim 1 for low temperature well cementing, it is characterised in that: be by
What the group of following parts by weight was grouped as: 30 parts of G class g cements, 70 parts of essence CA-50 aluminate cements, 10 parts of paraffin microcapsules, 25
Part hollow glass floating bead, 77.2 parts of water, 0.35 part of retarder boric acid, density 1.36g/cm3；
" the G class g cement " is the portland cement in " silicate-aluminate complex cement ".
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610242980.5A CN105733519B (en) | 2016-04-19 | 2016-04-19 | Hydrophily paraffin microcapsule strong low hydration heat cement system early |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610242980.5A CN105733519B (en) | 2016-04-19 | 2016-04-19 | Hydrophily paraffin microcapsule strong low hydration heat cement system early |
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| Publication Number | Publication Date |
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| CN105733519A CN105733519A (en) | 2016-07-06 |
| CN105733519B true CN105733519B (en) | 2019-02-15 |
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| CN106947447B (en) * | 2017-03-20 | 2019-05-10 | 西南石油大学 | Thermo-sensitive expanding microcapsules agent for anti gassing-out and channeling control cement slurry system |
| WO2018233449A1 (en) | 2017-06-21 | 2018-12-27 | 中国石油大学(华东) | High-strength polymer hollow microsphere, preparation method therefor, and phase transition energy storage microsphere |
| CN108298905B (en) * | 2018-02-10 | 2020-10-20 | 浙江泉峰建筑园林有限公司 | High-strength concrete |
| CN111894520A (en) * | 2019-05-06 | 2020-11-06 | 中石化石油工程技术服务有限公司 | Method for regulating temperature of drilling fluid based on paraffin material |
| CN111154459B (en) * | 2020-01-20 | 2021-03-19 | 河北工业大学 | Organic-inorganic hybrid shell phase change capsule and preparation method thereof |
| CN112521113B (en) * | 2020-12-04 | 2022-06-17 | 交通运输部公路科学研究所 | Low-temperature hydration hardening gel material and preparation method and application thereof |
| CN113266304B (en) * | 2021-07-01 | 2022-06-07 | 中国石油大学(华东) | Penetrating hydrate layer cementing method for prolonging long-acting production life of oil and gas well |
| CN112898956A (en) * | 2021-01-27 | 2021-06-04 | 西安工程大学 | Temperature-responsive well cementation cement slurry and preparation method thereof |
| CN113201314B (en) * | 2021-04-22 | 2022-02-11 | 东南大学 | Preparation method and application of C-S-H/PEG1000 phase-change composite material |
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