CN110066648A - A kind of anti-strength retrogression oil well cement additive and methods for making and using same - Google Patents
A kind of anti-strength retrogression oil well cement additive and methods for making and using same Download PDFInfo
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- CN110066648A CN110066648A CN201810065622.0A CN201810065622A CN110066648A CN 110066648 A CN110066648 A CN 110066648A CN 201810065622 A CN201810065622 A CN 201810065622A CN 110066648 A CN110066648 A CN 110066648A
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- Prior art keywords
- strength retrogression
- oil well
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- weight
- cement additive
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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 present invention provides the oil well cement additives and its methods for making and using same of a kind of anti-strength retrogression, mainly include 10 ~ 35%wt of perlite, 55 ~ 85%wt of active silica and micro- 5 ~ 20%wt of silicon.When the oil well cement additive with cement weight be 100 parts, it is added in well cementing mortar architecture with 10-15 parts, then can solve cementing concrete under the high temperature conditions strength retrogression the problem of, be conducive to improve cementing quality, extend the oil well service life, especially there are the oil wells of hot conditions for thermal production well, geothermal well, high temperature well etc., and can be suitable for different temperature in the severe well cementation environment of property, are with a wide range of applications.
Description
Technical field
The present invention relates to one of oil exploitation auxiliary chemicals fields to prevent Behavior of Hardened Cement Paste strength retrogression under the high temperature conditions
Anti- strength retrogression oil well cement additive and methods for making and using same.
Background technique
Cement sheath is the important indicator of cementing quality and oilfield life to the ability of oil/gas well Inter-zonal packing.However conventional water
Mud cement the well the cement sheath to be formed under high temperature (API standard provide 110 DEG C the above are Behavior of Hardened Cement Paste hot environments) due to cement slurry
In " C-S-H " gel generate crystal phase transition, sharply fail so as to cause strength of cement.And add sand cement slurry that can only also hold
By 110 DEG C~250 DEG C of high temperature.Currently, thick oil thermal extraction mostly uses steam soak and steam driving exploitation mode.Vapor (steam) temperature one
As up to 300~350 DEG C, even up to 375 DEG C of steam critical-temperature.At this temperature, cement sheath strength retrogression is serious, causes
The problems such as run, drip, leak of thick oil thermal production well mouth, seriously affects the subsequent development of thick oil thermal extraction, therefore, how to improve water
Intensity after mudstone ring steam soak resistant to high temperatures needs to be studied.
At abroad, the research in relation to Behavior of Hardened Cement Paste high-temperature behavior only has several documents.Wherein, 1934, Meng Zier was sent out for the first time
It is existing, the substance containing SiO2 is mixed in portland cement, can greatly improve the intensity that pressure steams (cement) test specimen.Nineteen eighty-three
Smith et al. consolidates steamed well by the way that foamed cement or the Microballoon cement of silica is added, and using multistage water filling
The mode of mud could get well these wells admittedly.Nelson and Silers in 1985 etc. has studied several Behavior of Hardened Cement Paste that different external feedings are added
The variation of its compression strength and permeability at 232 DEG C and 312 DEG C.Result of study shows the infiltration for making additive with bentonite
Rate highest；Although making that permeability after the maintenance of additive is low with diatomite but strength grade is too poor.
Summary of the invention
The purpose of the present invention is provide a kind of suitable extensively to solve the problems, such as oil-well cement strength retrogression under the high temperature conditions
For the anti-strength retrogression oil well cement additive of oil well cementing and preparation and its application method.
Technical solution of the present invention is a kind of anti-strength retrogression oil well cement additive first, and comprising following components and its is heavy
Measure percentage are as follows:
6. 10~35%wt of perlite,
7. 55~85%wt of active silica,
8. micro- 5~20%wt of silicon.
Aforementioned component advanced optimizes are as follows:
9. 15~30%wt of perlite,
10. 60~80%wt of active silica,
Micro- 5~15%wt of silicon.
Wherein the active silica is by following modified: impregnating silica sand with deionized water first to remove its surface
Impurity, then 100~250 DEG C of immersion about 10~15h in saturated calcium hydroxide solution；Filtering, drying, after cleaning, by table
Silica sand of the face rich in calcium hydroxide is dried in 110 DEG C of vacuum constant-temperature containers.
Followed by a kind of preparation method of anti-strength retrogression oil well cement additive of technical solution of the present invention: by pearl
In rock, active silica and micro- silicon investment mixing machine, carry out after puddling uniformly up to product.
Technical solution of the present invention is the third is a kind of application method of anti-strength retrogression oil well cement additive: being contained with cement
Amount is to add anti-10~15 weight of strength retrogression oil well cement additive in the cement paste for well cementation of 100 parts by weight meters
Part is to get mortar architecture.
Aforementioned applications method advanced optimizes are as follows: further includes 2~4 parts by weight of dispersing agent, 1~3 parts by weight of fluid loss agent are delayed
Solidifying 0.5~1.5 parts by weight of agent.
The dispersing agent is SWJZ-1 type, and the fluid loss agent SWJ-4 type, the retarder is SWH-1 type.
Cementing slurry described above is some cement paste for well cementation systems commonly used in the prior art.Wherein cement is logical
Normal cementing concrete, the dispersing agent, fluid loss agent, retarder are the usual auxiliaries of well cementing mortar architecture, commercially available
And it obtains.
Effect of the invention: well cementing mortar architecture is added in anti-strength retrogression oil well cement additive of the present invention
It is able to solve the strength retrogression problem of cement sheath at high temperature afterwards, after the compression strength of cement sheath, especially high temperature can be improved
Compression strength, extend the packing timeliness of cement sheath, there are high temperature hole conditions suitable for thick oil thermal extraction, geothermal well, high temperature well etc.
Oil well.
Detailed description of the invention
Fig. 1 is the temperature and resistance to compression for being not added with the well cementing mortar architecture of the anti-strength retrogression oil well cement additive of the present invention
Strong dash forward moves towards figure；
Fig. 2 is the well cementing mortar architecture sample appearance photo for being not added with the anti-strength retrogression oil well cement additive of the present invention
Scheme (only for control reference)；
Fig. 3 is a kind of well cementing mortar architecture sample of the anti-embodiment of strength retrogression oil well cement additive of the addition present invention
Appearance photo figure (only for control reference).
Specific embodiment
Below with reference to embodiment, the present invention will be further described.
Raw material illustrates: testing perlite used, the materials such as micro- silicon are obtained by commercially available；Dispersing agent (SWJZ-1), drop
The materials such as dehydration agent (SWJ-4), retarder (SWH-1) are purchased from Shandong World Oilfield Technology Co., Ltd..
In order to illustrate problem, generally the cementing concrete sample that anti-strength retrogression oil well cement additive is added and in phase
The cementing concrete sample that anti-strength retrogression oil well cement additive is not added under the conditions of is compared.Entire test is marked by API
Standard 10 carries out,
The preparation method embodiment of anti-strength retrogression oil well cement additive
Embodiment 1:
30%wt perlite is taken, active silica 60%wt, micro- silicon 10%wt is added, is put into double worm mixer,
It is puddled, is puddled repeatedly 2 hours, up to product after uniformly, which is pale powder 1# product.
Embodiment 2:
25%wt perlite is taken, active silica 60%wt, micro- silicon 15%wt is added, is put into double worm mixer,
It is puddled, is puddled repeatedly 2 hours, up to product after uniformly, which is pale powder 2# product.
Embodiment 3:
20%wt perlite is taken, active silica 70%wt, micro- silicon 10%wt is added, is put into double worm mixer,
It is puddled, is puddled repeatedly 2 hours, up to product after uniformly, which is pale powder 3# product.
Embodiment 4:
15%wt perlite is taken, active silica 80%wt, micro- silicon 5%wt is added, is put into double worm mixer, into
Row is puddled, and is puddled repeatedly 2 hours, and up to product after uniformly, which is pale powder 4# product.
Anti- strength retrogression oil well cement additive application examples
Comparative example 1:
No. 1 well cementing mortar architecture: victory Weihe River G cement (Linchu, shantung Sheng Wei special cement Co., Ltd) 100 parts by weight,
0.6 parts by weight of dispersing agent (SWJZ-1), 1.0 parts by weight of fluid loss agent (SWJ-4), 0.1 parts by weight of retarder (SWH-1)
Number, liquid-solid ratio 0.46.No. 1 system is subjected to high temperature front and back intensity test, involved cement briquette is comparative sample 1.
Embodiment 5:
It is added on the basis of above-mentioned No. 1 well cementing mortar architecture outside the made anti-strength retrogression oil-well cement of embodiment 1
Add agent 1# product, is uniformly mixed and obtains No. 2 well cementing mortar architectures.Wherein the dosage of 1# product is with cement weight in cementing slurry
Amount is calculated as 13.6 parts for 100 parts.
Embodiment 6:
The made anti-strength retrogression oil well cement additive of embodiment 2 is added on the basis of No. 1 well cementing mortar architecture
2# product is uniformly mixed and obtains No. 3 well cementing mortar architectures.Wherein the dosage of 2# product is with cement weight in cementing slurry
100 parts are calculated as 12.2 parts.
Embodiment 7:
The made anti-strength retrogression oil well cement additive of embodiment 3 is added on the basis of No. 1 well cementing mortar architecture
3# product is uniformly mixed and obtains No. 4 well cementing mortar architectures.Wherein the dosage of 3# product is with cement weight in cementing slurry
100 parts are calculated as 15.0 parts.
Embodiment 8:
The made anti-strength retrogression oil well cement additive of embodiment 4 is added on the basis of No. 1 well cementing mortar architecture
4# product is uniformly mixed and obtains No. 5 well cementing mortar architectures.Wherein the dosage of 4# product is with cement weight in cementing slurry
100 parts are calculated as 10.2 parts.
Anti- strength retrogression merit rating
The ability of the anti-strength retrogression of Behavior of Hardened Cement Paste mainly passes through the compression strength value judgement after Behavior of Hardened Cement Paste High Temperature Curing.The present invention
The anti-strength retrogression merit rating method of the anti-strength retrogression oil well cement additive comprises the steps of:
(1) cement slurry is made according to API standard 10, normal pressure is thickened 20min at 50 DEG C, and intensity maintenance is poured under stirring
Mould；
(2) compression strength is measured after conserving 72h at 50 DEG C, is initial compression strength；
(3) Behavior of Hardened Cement Paste conserved of 72h at 50 DEG C is put into high temperature and pressure protective cauldron, at specified temperatures (such as 200 DEG C,
280 DEG C, 320 DEG C, 350 DEG C) maintenance 72h；
(4) cement briquette intensity test is carried out again after conserving, and fall is got over compared with initial compression strength
Small anti-strength retrogression ability is better.
Below with reference to the anti-strength retrogression ability evaluation and test of the cement slurry of 1 pair of the table anti-strength retrogression oil well cement additive of addition
As a result it is illustrated.
Table 1 is after the oil-well cement slurry system prepared according to comparative example 1 and embodiment 5~8 conserves at different temperatures
Behavior of Hardened Cement Paste intensity test result.It can be seen that not adding the well-cementing cement of anti-strength retrogression oil well cement additive through high temperature
Compression strength sharply declines after maintenance, and compression strength is less than 5MPa after 200 DEG C, it is difficult to meet site operation needs.And it adds
The anti-strength retrogression ability of the mortar architecture of anti-strength retrogression oil well cement additive is improved.
Table 1
With reference to Fig. 1, the well cementation water for being not added with the anti-strength retrogression oil well cement additive of the present invention also can be intuitively reacted
Mud system starts to be decreased obviously at 110 °.
Additionally by directly observation it has also been discovered that the Behavior of Hardened Cement Paste of No. 1 mortar architecture preparation appearance after High Temperature Curing is dredged
Pine, wash cement stone falls off (referring to attached drawing 2), and flawless, appearance after the Behavior of Hardened Cement Paste High Temperature Curing of No. 4 mortar architectures preparation
Without unconsolidated material, Behavior of Hardened Cement Paste hyrate is hard, intensity is higher (referring to attached drawing 3).
Claims (10)
1. a kind of anti-strength retrogression oil well cement additive, it is characterised in that include following components and its weight percent are as follows:
10 ~ 35%wt of perlite,
55 ~ 85%wt of active silica,
Micro- 5 ~ 20%wt of silicon.
2. anti-strength retrogression oil well cement additive according to claim 1, it is characterised in that comprising following components and its
Weight percent are as follows:
15 ~ 30%wt of perlite,
60 ~ 80%wt of active silica,
Micro- 5 ~ 15%wt of silicon.
3. anti-strength retrogression oil well cement additive according to claim 2, it is characterised in that the reactive silica
Silicon is by following modified: the impurity on its surface is removed with deionized water immersion silica sand first, it is then molten in saturated calcium hydroxide
100 ~ 250 DEG C of immersion about 10 ~ 15h in liquid；Filtering, drying, after cleaning, the silica sand by surface rich in calcium hydroxide is true at 110 DEG C
It is dried in empty insulating box.
4. the preparation method of anti-strength retrogression oil well cement additive according to claim 1 to 3, feature
It is: perlite, active silica and micro- silicon is put into mixing machine, carries out after puddling uniformly up to product.
5. the application method of anti-strength retrogression oil well cement additive according to claim 1 to 3, feature
Be: by cement content be 100 parts by weight in terms of cement paste for well cementation in, it is additional to add the anti-strength retrogression oil-well cement
10 ~ 15 parts by weight of agent are to get mortar architecture.
6. the application method of anti-strength retrogression oil well cement additive according to claim 5, it is characterised in that also include
Following components: 2 ~ 4 parts by weight of dispersing agent, 1 ~ 3 parts by weight of fluid loss agent, 0.5 ~ 1.5 parts by weight of retarder.
7. the application method of anti-strength retrogression oil well cement additive according to claim 6, it is characterised in that: described point
Powder is SWJZ-1 type, and the fluid loss agent SWJ-4 type, the retarder is SWH-1 type.
8. the application side of anti-strength retrogression oil well cement additive preparation method made from preparation method according to claim 4
Method, it is characterised in that: by cement content be 100 parts by weight in terms of cement paste for well cementation in, add the anti-strength retrogression oil
10 ~ 15 parts by weight of well cement additive are to get mortar architecture.
9. the application method of anti-strength retrogression oil well cement additive according to claim 8, it is characterised in that also include
Following components: 2 ~ 4 parts by weight of dispersing agent, 1 ~ 3 parts by weight of fluid loss agent, 0.5 ~ 1.5 parts by weight of retarder.
10. the application method of anti-strength retrogression oil well cement additive according to claim 9, it is characterised in that: described
Dispersing agent is SWJZ-1 type, and the fluid loss agent SWJ-4 type, the retarder is SWH-1 type.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810065622.0A CN110066648A (en) | 2018-01-23 | 2018-01-23 | A kind of anti-strength retrogression oil well cement additive and methods for making and using same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810065622.0A CN110066648A (en) | 2018-01-23 | 2018-01-23 | A kind of anti-strength retrogression oil well cement additive and methods for making and using same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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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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| CN104230267A (en) * | 2014-09-09 | 2014-12-24 | 普定县银丰农业科技发展有限公司 | Thermal-insulation moisture-proof floor tile and preparation method thereof |
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- 2018-01-23 CN CN201810065622.0A patent/CN110066648A/en active Pending
Patent Citations (3)
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| CN103571444A (en) * | 2012-07-20 | 2014-02-12 | 中国石油化工股份有限公司 | High temperature-resistant oil well cement additive, and preparation and applications 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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