CN107902933A - A kind of oil-well cement high temperature resistance decline extra material and preparation method thereof - Google Patents
A kind of oil-well cement high temperature resistance decline extra material and preparation method thereof Download PDFInfo
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- CN107902933A CN107902933A CN201711195203.0A CN201711195203A CN107902933A CN 107902933 A CN107902933 A CN 107902933A CN 201711195203 A CN201711195203 A CN 201711195203A CN 107902933 A CN107902933 A CN 107902933A
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- Prior art keywords
- oil
- high temperature
- well
- present
- temperature resistance
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Classifications
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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
- 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
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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
Abstract
The invention discloses a kind of oil-well cement high temperature resistance decline extra material and preparation method thereof, solves the problems, such as that mortar architecture of the prior art is not suitable for superhigh temperature and cements the well with the simultaneous geothermal well of the super large temperature difference.The present invention includes：40% 60% photovoltaic silicons；15% 30% aerosils；15% 30% dead burned magnesias；1% 2% mineral fibres.The compression strength more than 200 DEG C can be effectively ensured in the present invention, reach the effect for the decline for reducing compression strength.
Description
Technical field
The present invention relates to admixture for cement slurry field, and in particular to a kind of oil-well cement high temperature resistance decline extra material and its preparation
Method.
Background technology
China is the country of geothermal energy resources relative abundance, and geothermal energy resources total amount accounts for the 7.9% of the whole world, and recoverable reserves is suitable
In 4626.5 hundred million tons of standard coals, thermally the presence in the form of high-temperature geothermal of the resource overwhelming majority (is higher than 150 DEG C for western China
Steam), geothermal energy resources can not only provide clean energy resource but also be a kind of for works such as extraction bromine, iodine, borax, sylvite, ammonium salts
The hot brine resource of industry raw material and natural rich water resource.In today that environmental pressure is huge and promotes new energy to develop, underground heat money
Source will be fully utilized.
Geothermal well well cementation is similar with superhigh temperature oil gas well cementing operation, and cement mortar will undergo shaft bottom superhigh temperature during note replaces,
Usually above 200 DEG C, Behavior of Hardened Cement Paste is subjected to more than 150 DEG C of high temperature for a long time in the certain annular space length in underground.Geothermal well is cemented the well
With superhigh temperature well cementation part is slightly different to be, the well cementation of oil/gas well superhigh temperature it is most of for the not long temperature difference of drilling liner cementing interval isolation not
Greatly, and the high-temperature geothermal resource of geothermal well is present in underground in the form of high-temperature steam, when well cementation, requires sealing integrality cement
Slurry is returned to well head, thus superhigh temperature exists at the same time with the super large temperature difference in geothermal well well cementation.
Existing mortar architecture is subjected to more than 110 DEG C of high temperature for a long time, it may appear that strength retrogression by a relatively large margin.Grind before
Study carefully and show that such decline can be prevented by adding the silica flour for accounting for 35% of cement proportion or more, but existing research and scene are actual raw
Production shows：Silica flour is not highly resistant to such decline, even added with 50% and the silica fume cement or quartz sand water of the above
Mudstone, strength retrogression by a relatively large margin also occurs under the hot conditions more than 150 DEG C, occurs after cement strength decline
Annular space is with pressure, reduces a series of problems, such as recovery ratio, even results in the well and scraps.
The content of the invention
The technical problems to be solved by the invention are：Even if added in the prior art under the hot conditions more than 150 DEG C
The problem of strength retrogression by a relatively large margin also occurs for the silica flour of cement proportion 35% or more, and it is an object of the present invention to provide a kind of oil well
Cement high temperature resistance decline extra material, by the optimization of formula, can be effectively ensured the compression strength more than 200 DEG C, reach reduction
The effect of the decline of compression strength.
The present invention is achieved through the following technical solutions：
A kind of oil-well cement high temperature resistance decline extra material, with weight percentage, including：
High temperature in the present invention is anti-ageing, and to move back agent be following BHS-70S, and BHS-70S is suitable for the oil of domestic all labels
G grades of high sulfate resisting cement of well, which shows chemical inertness at normal temperatures does not influence the live mixture and note of cement mortar
Replace.The cement mortar effect that anti-compression strength fails under the high temperature conditions is improved, and effect is very notable.
Learnt by detection, the present invention plays intensity in 72h, can reach 35.4MPa at 3 days, slowly increases to 28 days intensity
Long to stablize to 37.8MPa and then long-term value preserving, the compression strength of 98 days reaches 37.2MPa, and the compression strength of 98 days was protected with 28 days
Hold basically identical.Thus, the present invention can also effectively reduce influence of 200 DEG C of temperatures above to compression strength, reach reduction resistance to compression
The effect of strength retrogression, effect are very notable.
Further, the present invention includes：
Preferably, the particle diameter of the photovoltaic silicon is the mesh of 140 mesh~200.Length≤5mm of the mineral fibres.
A kind of preparation method of oil-well cement high temperature resistance decline extra material, including：By photovoltaic silicon, aerosil, again
Burned magnesium oxide and mineral fibres are uniformly mixed.
Compared with prior art, the present invention have the following advantages and advantages：
1st, the present invention can be effectively ensured the compression strength more than 200 DEG C, reach reduction pressure resistance by the optimization of formula
The effect of the decline of degree；
2nd, the present invention is suitable for G grades of high sulfate resisting cement of oil well of domestic all labels, and the present invention shows at normal temperatures
Going out chemical inertness does not influence the live mixture of cement mortar and notes to replace, applied widely；
3rd, technique of the invention is simple, relative inexpensiveness, and environmental-friendly, effect is very notable.
Brief description of the drawings
Attached drawing described herein is used for providing further understanding the embodiment of the present invention, forms one of the application
Point, do not form the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is Behavior of Hardened Cement Paste electromicroscopic photograph made of embodiment 1.
Fig. 2 is Behavior of Hardened Cement Paste electromicroscopic photograph made of embodiment 4.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment, the present invention is made
Further to describe in detail, exemplary embodiment of the invention and its explanation are only used for explaining the present invention, are not intended as to this
The restriction of invention.
Embodiment 1
A kind of oil-well cement high temperature resistance decline extra material, including photovoltaic silicon, aerosil, dead burned magnesia and mineral
Fiber.
The BHS-70S of the present invention is prepared into geothermal well well cementing mortar architecture as a part for dry ash, and to the ground
The performance of hot well well cementing mortar architecture is detected, which sets as follows：
Geothermal well well cementing mortar architecture includes dry ash, fluid loss agent BFL-12L, drag reducer BFR-31L and high temperature slow setting
Agent BRT-22L；Wherein, BCS-400S and G grades of BHS-70S of the invention, micro- silicon, high-temperature stabilizer oil-well cements are formed dry together
Ash.
High temperature retarder BRT-22L includes AMPS (2- acrylamido -2- methyl propane sulfonic acids), acrylamide, clothing health
Acid, maleic anhydride, acryloyl morpholine and water.
High-temperature stabilizer BCS-400S includes vinyl pyrrolidone, acrylamide, N, N- dimethacrylamide, propylene
Morpholide and water.
The preparation method of the geothermal well well cementing mortar architecture is as follows in the present embodiment：
Step 1: the BHS-70S of the configuration present invention：By photovoltaic silicon, aerosil, dead burned magnesia and mineral fibres
It is uniformly mixed and obtains BHS-70S.
Configure high temperature retarder BRT-22L：By AMPS, acrylamide, itaconic acid, maleic anhydride, acryloyl morpholine and water
After being uniformly mixed and adjusting pH to 6 by NaOH, it is added in reaction vessel, and N is passed through in reaction vessel2Protection, 50 DEG C
When add the ammonium persulfate of monomer mass 2.0%-3.0% and carry out radical polymerization；Start when being reacted to and reaching maximum temperature point
Timing, high temperature retarder BRT-22L is obtained after timing 1h.
Configure high-temperature stabilizer BCS-400S：By vinyl pyrrolidone, acrylamide, N, N- dimethacrylamide,
Acryloyl morpholine and water are configured to solution after mixing, adjust pH value of solution to after 6.5~7.5, are added in reaction vessel, and
N is passed through in reaction vessel2Protection, the ammonium persulfate that solution solid content 2.0%-3.0% is added at 40~50 DEG C carry out instead
Should；After reacting 3~5h, monomer finished product is obtained by dry, micro- silicon of its weight 15% is added in monomer finished product, and that high temperature is made is steady
Determine agent BCS-400S.The raw material of monomer finished product includes vinyl pyrrolidone 6%, acrylamide 2%, N, N- dimethyl allene acyls
Amine 5%, acryloyl morpholine 15%, remaining is water.
Step 2: by BHS-70S, high temperature retarder BRT-22L, micro- silicon, high-temperature stabilizer BCS-400S, drag reducer BFR-
BFL-12L, G grades of 31L, fluid loss agent oil-well cements are uniformly mixed.Behavior of Hardened Cement Paste electromicroscopic photograph such as Fig. 1 made of the present embodiment
It is shown.
The specific proportioning of each material is as follows in the present embodiment：
By G grades of oil-well cements, the high temperature for accounting for G grades of oil-well cement quality 50% anti-ageing move back agent BHS-70S, accounts for G grades of oil dry ash
Micro- silicon of well cement quality 0%, the high-temperature stabilizer BCS-400S compositions for accounting for G grades of oil-well cement quality 0.8%, and in dry ash
Add the fluid loss agent BFL-12L, 1.0% drag reducer BFR-31L, 7.0% high temperature retarder BRT-22L of its weight 6%.
BHS-70S is fine by 57% photovoltaic silicon, 22% aerosil, 20% dead burned magnesia, 1% mineral
Dimension composition.High temperature retarder BRT-22L is by 15% 2- acrylamido -2- methyl propane sulfonic acids, 3% acrylamide, 3%
Itaconic acid, 3% maleic anhydride, 2% acryloyl morpholine and 74% water composition.
Embodiment 2
Difference lies in a kind of oil-well cement high temperature resistance decline extra material in the present embodiment with embodiment 1 for the present embodiment
The proportioning of each material is different, and the specific proportioning in the present embodiment is as follows：
A kind of oil-well cement high temperature resistance decline extra material is by 57% photovoltaic silicon, 15% aerosil, 27%
Dead burned magnesia, 1% mineral fibres composition.
Embodiment 3
Difference lies in a kind of oil-well cement high temperature resistance decline extra material in the present embodiment with embodiment 1 for the present embodiment
The proportioning of each material is different, and the specific proportioning in the present embodiment is as follows：
A kind of oil-well cement high temperature resistance decline extra material is by 57% photovoltaic silicon, 27% aerosil, 15%
Dead burned magnesia, 1% mineral fibres composition.
Embodiment 4
The present embodiment is the comparative example of embodiment 1, and the composition in the present embodiment is different, the tool of dry ash in the present embodiment
Body sets as follows：
Dry ash includes G grades of high sulfate resisting cement of oil well, accounts for the mineral fibres of G grades of high sulfate resisting cement qualities 1%+account for
The silica flour of G grades of high sulfate resisting cement qualities 49%.Behavior of Hardened Cement Paste electromicroscopic photograph is as shown in Figure 2 made of the present embodiment.
As shown in Figure 1：The Behavior of Hardened Cement Paste electromicroscopic photograph of BHS-70S is added, product is uniform needle-shaped entringite, and is added
The Behavior of Hardened Cement Paste electromicroscopic photograph of quartz sand, product are amorphous state, as shown in Figure 2.
The detection of performance is carried out to above-described embodiment, testing result is as shown in table 1.
Table 1
Pass through the experimental result of above-mentioned table 1：The compression strength more than 200 DEG C can be effectively ensured, reduce Behavior of Hardened Cement Paste
Permeability, reaches the effect for reducing strength retrogression.
Above-described embodiment, has carried out the purpose of the present invention, technical solution and beneficial effect further
Describe in detail, it should be understood that the foregoing is merely the embodiment of the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution, improvement and etc. done, should all include
Within protection scope of the present invention.
Claims (5)
- The extra material 1. a kind of oil-well cement high temperature resistance fails, it is characterised in that with weight percentage, including：
- A kind of 2. oil-well cement high temperature resistance decline extra material according to claim 1, it is characterised in that including：
- 3. a kind of oil-well cement high temperature resistance decline extra material according to claim 1, it is characterised in that the photovoltaic silicon Particle diameter is the mesh of 140 mesh~200.
- A kind of 4. oil-well cement high temperature resistance decline extra material according to claim 1, it is characterised in that the mineral fibres Length≤5mm.
- 5. such as a kind of preparation method of oil-well cement high temperature resistance decline extra material of claim 1~2 any one of them, its feature It is, including：Photovoltaic silicon, aerosil, dead burned magnesia and mineral fibres are uniformly mixed.
Priority Applications (1)
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| CN201711195203.0A CN107902933B (en) | 2017-11-24 | 2017-11-24 | High-temperature-fading-resistant admixture for oil well cement and preparation method thereof |
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| CN201711195203.0A CN107902933B (en) | 2017-11-24 | 2017-11-24 | High-temperature-fading-resistant admixture for oil well cement and preparation method thereof |
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| CN107902933B CN107902933B (en) | 2021-06-22 |
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Cited By (2)
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| CN107828393A (en) * | 2017-11-24 | 2018-03-23 | 成都博世威科技有限公司 | A kind of superhigh temperature retarder and its preparation technology |
| CN112830700A (en) * | 2021-01-19 | 2021-05-25 | 中国石油天然气集团有限公司 | Oil well cement high-temperature strength stabilizer for well cementation, cement slurry and preparation method thereof |
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| CN112830700A (en) * | 2021-01-19 | 2021-05-25 | 中国石油天然气集团有限公司 | Oil well cement high-temperature strength stabilizer for well cementation, cement slurry and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN107902933B (en) | 2021-06-22 |
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