CN105199691A - Well cementation cement paste used for aquo-complex-containing stratum - Google Patents
Well cementation cement paste used for aquo-complex-containing stratum Download PDFInfo
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- CN105199691A CN105199691A CN201410285747.6A CN201410285747A CN105199691A CN 105199691 A CN105199691 A CN 105199691A CN 201410285747 A CN201410285747 A CN 201410285747A CN 105199691 A CN105199691 A CN 105199691A
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Abstract
The invention relates to well cementation cement paste used for an aquo-complex-containing stratum. When low temperature and low hydration heat well cementing materials are weighed by 100%, the cement paste is prepared from, by mass, 15-65% of low density weight-reduction materials, 0.5-2% of drag-reduction agents, 0.1-0.5% of fluid loss agents, 0.1-3% of retarder, 2-7% of early strength agents and 40-100% of water, wherein the density of the cement paste is 1.3-1.7 g/ cm<3>. Compared with a conventional cement paste system, the hydration heat of the cement paste system is substantially lowered, temperature rise in the hydration process of the cement paste can be small, and the cement paste can be applied to well cementation of the aquo-complex-containing stratum.
Description
Technical field
The present invention relates to a kind of petroleum drilling engineering field cementing technology, low hydration heat mortar architecture used, contain the well cementation of hydrate formation for permafrost horizon or deep water.
Background technology
Along with the continuous expansion of the exploratory development of petroleum resources, current survey area is to deep-sea and cold district development.Deep water hydrocarbon resources exploration inevitably runs into hydrate formation.Under gas hydrate are present in cryogenic high pressure condition, temperature 0 ~ 10 DEG C, more than pressure 10MPa, gas hydrate just can exist, and are generally present in the depth of water and are greater than in the deep-sea of 300m, also likely exist in permafrost stratum simultaneously.The average composition of gas hydrate is comprise the Sweet natural gas of 1 mole in the water of every 5.75 moles, and density is 0.9g/cm
3, under the condition of pressure 1MPa, temperature 0 DEG C, containing 168 liters of Sweet natural gases in 1 premium on currency compound.Therefore when gas hydrate decomposes, its volume will sharply expand, and will cause huge safety problem.
Guarantee the hydrocarbon resources exploiting below deep water hydrate layer safely and efficiently, must ensure the hydrate of hydrate layer in drilling process can also stable existence, do not decompose.People's low temperature coagulant must be added during deep water cementing reach to reduce curing time the object shortening construction cycle in cementing slurry, but the deep-water low-temperature setting accelerator of routine can bring a large amount of reaction heat to grout, probably cause the hydrate decomposes of hydrate layer, affect overall packing and the cementing quality of cement mantle, threaten drilling unit safety.Therefore, conventional grout cannot be applicable to the well cementation of deep water hydrate layer.
Publication number CN101328050 patent discloses a kind of low temperature low hydration heat cement system, and it consists of containing G level oil well cement 20 ~ 60%, ultrafine slag 20 ~ 40%, flyash 15 ~ 26%, and its hydration heat reduces by 40 ~ 50% than traditional cements.
The subject matter existed: it is fast that current short-term strength cement slurry system generally exists hydration heat, and between the waiting on cement, annular space temperature rises so high, and can destroy the stability of hydrate, and reduce the strength development that hydration heat then affects cement.
Summary of the invention
The object of this invention is to provide a kind of for the cementing slurry containing hydrate formation.Large for current short-term strength cement pulp-water thermal discharge, grout time annular space in solidifying period is caused to heat up too high, cause permafrost horizon or deep water containing hydrate layer instability, cause has channeling of cementing the well, the serious consequences such as well kick, from promoting to start with in hydration heat two aspect of cement slurry sets and reduction grout, have developed a kind of low hydration heat mortar architecture being applicable to hydrate layer well cementation, this system is strong successful early, the feature of approximate right angle multiviscosisty, while effectively shortening the cement slurry sets time, also can not bring a large amount of reaction heat to grout, the stability of hydrate layer can be ensured.
Of the present invention for the cementing slurry containing hydrate formation, percentages by quality: by low temperature low hydration heat well cementing material 100%, add low density lightening material 15 ~ 65%, flow improver 0.5 ~ 2%, water retaining 0.1 ~ 0.5%, retardant 0.1 ~ 3%, hardening accelerator 2 ~ 7%, water 40 ~ 100%, cement slurry density is 1.3 ~ 1.7g/cm
3.
Described its component of low temperature low hydration heat well cementing material and mass percent are: fast hard iron aluminate cement 30 ~ 70%, volcano grey matter mineral 20 ~ 50%, fine solid spherical particles 10 ~ 40%.
Described volcano grey matter mineral, refer to natural or artificial containing based on the mineral material of active silica, activated alumina, add water with lime after wearing into fine powder and mix, its granularity is 20 ~ 100 microns.
Described minute spherical particle main component is SiO
2and Al
2o
3, its composition is ceramics powder, iron powder, aluminium powder or Paris white, and its granularity is 2 ~ 5 microns.
Described low density lightening material is cenosphere, and its particle diameter is 40 ~ 250 microns.Main component is SiO
2and Al
2o
3.
Described water retaining is AMPS copolymer.
Described flow improver is polycarboxylic acid salt.
Described retardant is citric acid, Trisodium Citrate.
Described water is fresh water, salt solution or seawater.
Described hardening accelerator is CaCl
2or sodium metaaluminate.
Adopt ordinary method to prepare low hydration heat early-strength cementing slurry for well cementation, first wet mixing admixture is mixed with water, cement and low temperature strongthener and low density lightening material are dry mixed evenly, then liquid and dry material are puddled shape cost product.
1. fast hard iron aluminate cement is adopted to ensure the early strength development of cement, 2. the volcano grey matter mineral with gelation activity are added, reduce the hydration heat of cement, and ensure the longterm strength of Behavior of Hardened Cement Paste, 3. the minute spherical particulate material that can reduce hydration heat is added, reduce the total water heat-transmission of cement, and form grain composition with cement, volcano grey matter mineral and cenosphere, improve low-density cement mortar performance.
The present invention's beneficial effect compared with prior art:
1. strength development is fast at low temperatures for this low hydration heat early-strength cementing slurry for well cementation system, and hydration heat is minimum simultaneously reaches 1/2 of conventional cement slurries, and when making grout wait solidifying, temperature is low, does not affect hydrate stability, ensures the safety after well cementation.
2. this low hydration heat early-strength cementing slurry for well cementation system adopts particle level technology, and improve the performance of grout, improve grout mechanical property, the Behavior of Hardened Cement Paste rate of permeation of formation is low, and permanent stability are good, and static gel strength development is fast, has excellent anti-gas channeling ability.
3. this low hydration heat early-strength cementing slurry for well cementation system has that rheological is good, dehydration is little, the thickening time is easy to regulate, and facilitates site operation.
Deep water low hydration heat early-strength cementing slurry for well cementation system of the present invention solves permafrost horizon and the deep water cementing technology difficult problem containing hydrate layer, can prevent the decomposition of hydrate in well cementing process.
Embodiment:
Adopt ordinary method, first admixture is mixed with water, cement and low temperature strongthener and low density lightening material are dry mixed evenly, then liquid and dry material are puddled shape cost product.
Described volcano grey matter mineral, be natural or artificial containing based on the mineral material of active silica, activated alumina, add water with lime after wearing into fine powder and mix, its granularity is 20 ~ 100 microns.
Described minute spherical particle main component is SiO
2and Al
2o
3, its composition is ceramics powder, iron powder, aluminium powder or Paris white, and its granularity is 2 ~ 5 microns.
Described low density lightening material is cenosphere, and its particle diameter is 40 ~ 250 microns.Main component is SiO
2and Al
2o
3.
Described water retaining is AMPS copolymer.
Described flow improver is polycarboxylic acid salt.
Described retardant is citric acid, Trisodium Citrate.
Described water is fresh water, salt solution or seawater.
Described hardening accelerator is CaCl
2or sodium metaaluminate.
Embodiment 1
Configuration density 1.7g/cm
3grout:
Cement-slurry method:
Get fast hard iron aluminate cement 30% by mass percentage, volcano grey matter mineral 30%, minute spherical particle 40% configures low temperature low hydration heat well cementing material, add cenosphere 15%, hardening accelerator 2%, retardant 1.6%, water 43%, water retaining 5%, 0.2% flow improver.
Embodiment 2
Configuration density 1.5g/cm
3grout:
Cement-slurry method:
Get 50% fast hard iron aluminate cement by mass percentage, 20% volcano grey matter mineral, 30% minute spherical particle configuration low temperature low hydration heat well cementing material, add 32% cenosphere, 4% hardening accelerator, 0.25% water retaining, 0.5% retardant, 52% water, 0.3% flow improver.
Embodiment 3
Configuration density 1.3g/cm
3grout:
Cement-slurry method:
The fast hard iron aluminate cement of configuration low temperature low hydration heat well cementing material 70%, 20% volcano grey matter mineral, 10% minute spherical particle, adds 65% cenosphere, 4% hardening accelerator, 0.3% water retaining, 0.45% retardant, 70% water, 0.3% defoamer, 2% flow improver.。
Comparative formula 1:
Density 1.30g/cm
3
80% oil well cement, 20% superfine cement, cenosphere 42%, water 75%, calcium chloride 2.5%, water 44%.
Formula in publication number CN101328050, fills a prescription as follows
Comparative formula 2:
Density 1.72g/cm
3
Oil well cement 32.40%, ultrafine slag 32.02%, flyash 28.42%, gypsum 4.01%, water 44%, CaO0.5%, sodium sulfate 1%.
Comparative formula 3:
Density 1.36g/cm
3
Oil well cement 32.40%, ultrafine slag 32.02%, flyash 28.42%, gypsum 4.01%, water 70%, CaO0.5%, sodium sulfate 1%, hollow beads 28%.
Cement slurry property test is carried out according to API10 standard:
Cement slurry property is as following table:
The hydration heat data (20 DEG C) of cement
Claims (9)
1. one kind for containing the cementing slurry of hydrate formation, it is characterized in that: the percentages by quality: by by low temperature low hydration heat well cementing material 100%, add low density lightening material 15 ~ 65%, flow improver 0.5% ~ 2%, water retaining 0.1% ~ 0.5%, retardant 0.1% ~ 3%, hardening accelerator 2% ~ 7% respectively, water 40 ~ 100% forms, and cement slurry density is 1.3 ~ 1.7g/cm
3.
2. according to claim 1 for the cementing slurry containing hydrate formation, it is characterized in that: described its component of low temperature low hydration heat well cementing material and mass percent are: fast hard iron aluminate cement 30% ~ 70%, volcano grey matter mineral 20% ~ 50%, fine solid spherical particles 10% ~ 40%.
3. according to claim 2 for the cementing slurry containing hydrate formation, it is characterized in that: described volcano grey matter mineral, refer to natural or artificial containing based on the mineral material of active silica, activated alumina, add water with lime after wearing into fine powder and mix, its granularity is 20 ~ 100 microns.
4. according to claim 2 for the cementing slurry containing hydrate formation, it is characterized in that: described fine solid spherical particles main component is SiO
2and Al
2o
3, its granularity is 2 ~ 5 microns.
5. according to claim 1 for the cementing slurry containing hydrate formation, it is characterized in that: described low density lightening material, is cenosphere, and main component is SiO
2and Al
2o
3,, its particle diameter is 40 ~ 250 microns.
6. according to claim 1 for the cementing slurry containing hydrate formation, it is characterized in that: described water retaining is AMPS copolymer.
7. according to claim 1 for the cementing slurry containing hydrate formation, it is characterized in that: described flow improver is polycarboxylic acid salt.
8. according to claim 1 for the cementing slurry containing hydrate formation, it is characterized in that: described retardant is citric acid, Trisodium Citrate.
9. according to claim 1 for the cementing slurry containing hydrate formation, it is characterized in that: described water is fresh water, salt solution or seawater.
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|---|---|---|---|
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|---|---|---|---|
| CN201410285747.6A CN105199691A (en) | 2014-06-23 | 2014-06-23 | Well cementation cement paste used for aquo-complex-containing stratum |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107216071A (en) * | 2017-05-16 | 2017-09-29 | 西安浩沃新能源有限公司 | A kind of deep geothermal heat well low-temperature zone well cementation insulating cement slurry and preparation method thereof |
| CN109266320A (en) * | 2018-11-06 | 2019-01-25 | 中国海洋石油集团有限公司 | A kind of low hydration heat cement slurry |
| CN110218555A (en) * | 2019-07-15 | 2019-09-10 | 济南市坤鹏技术开发中心 | A kind of cement slurry for petroleum works |
| CN111056784A (en) * | 2018-10-17 | 2020-04-24 | 中国石油天然气集团有限公司 | Cement slurry for hydrate well cementation and preparation method thereof |
| CN111848013A (en) * | 2020-06-29 | 2020-10-30 | 尧柏特种水泥技术研发有限公司 | Special gas well cement slurry special for combustible ice exploitation |
| CN112723822A (en) * | 2020-12-30 | 2021-04-30 | 中国石油天然气集团有限公司 | Low hydration heat low density cement slurry system for well cementation and preparation method and application thereof |
| CN113213785A (en) * | 2021-06-04 | 2021-08-06 | 嘉华特种水泥股份有限公司 | High-strength low-hydration-heat well cementing cement and preparation method thereof |
| CN113266304A (en) * | 2021-07-01 | 2021-08-17 | 中国石油大学(华东) | Penetrating hydrate layer cementing method for prolonging long-acting production life of oil and gas well |
| CN114016973A (en) * | 2021-09-03 | 2022-02-08 | 中国石油大学(华东) | Hydration heat design method for cementing cement slurry of marine deepwater natural gas hydrate |
| CN116103025A (en) * | 2023-02-20 | 2023-05-12 | 中国石油大学(华东) | Hydrothermal synthesis material suitable for ultra-high temperature stratum well cementation |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107216071A (en) * | 2017-05-16 | 2017-09-29 | 西安浩沃新能源有限公司 | A kind of deep geothermal heat well low-temperature zone well cementation insulating cement slurry and preparation method thereof |
| CN111056784B (en) * | 2018-10-17 | 2022-03-29 | 中国石油天然气集团有限公司 | Cement slurry for hydrate well cementation and preparation method thereof |
| CN111056784A (en) * | 2018-10-17 | 2020-04-24 | 中国石油天然气集团有限公司 | Cement slurry for hydrate well cementation and preparation method thereof |
| CN109266320A (en) * | 2018-11-06 | 2019-01-25 | 中国海洋石油集团有限公司 | A kind of low hydration heat cement slurry |
| CN110218555A (en) * | 2019-07-15 | 2019-09-10 | 济南市坤鹏技术开发中心 | A kind of cement slurry for petroleum works |
| CN110218555B (en) * | 2019-07-15 | 2020-11-20 | 大庆天工开物能源科技有限公司 | Cement paste for petroleum engineering |
| CN111848013A (en) * | 2020-06-29 | 2020-10-30 | 尧柏特种水泥技术研发有限公司 | Special gas well cement slurry special for combustible ice exploitation |
| CN112723822A (en) * | 2020-12-30 | 2021-04-30 | 中国石油天然气集团有限公司 | Low hydration heat low density cement slurry system for well cementation and preparation method and application thereof |
| CN113213785A (en) * | 2021-06-04 | 2021-08-06 | 嘉华特种水泥股份有限公司 | High-strength low-hydration-heat well cementing cement and preparation method thereof |
| CN113266304A (en) * | 2021-07-01 | 2021-08-17 | 中国石油大学(华东) | Penetrating hydrate layer cementing method for prolonging long-acting production life of oil and gas well |
| 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 |
| CN114016973A (en) * | 2021-09-03 | 2022-02-08 | 中国石油大学(华东) | Hydration heat design method for cementing cement slurry of marine deepwater natural gas hydrate |
| CN116103025A (en) * | 2023-02-20 | 2023-05-12 | 中国石油大学(华东) | Hydrothermal synthesis material suitable for ultra-high temperature stratum well cementation |
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