CN106967399A - The preparation technology and its cementing method of low-density high-temperature geothermal cement mortar - Google Patents

The preparation technology and its cementing method of low-density high-temperature geothermal cement mortar Download PDF

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Publication number
CN106967399A
CN106967399A CN201610018914.XA CN201610018914A CN106967399A CN 106967399 A CN106967399 A CN 106967399A CN 201610018914 A CN201610018914 A CN 201610018914A CN 106967399 A CN106967399 A CN 106967399A
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CN
China
Prior art keywords
parts
cement mortar
well
pumped
plug
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Pending
Application number
CN201610018914.XA
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Chinese (zh)
Inventor
叶宏宇
桂江波
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Beijing Talent New Energy Technology Development Co Ltd
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Beijing Talent New Energy Technology Development Co Ltd
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Priority to CN201610018914.XA priority Critical patent/CN106967399A/en
Publication of CN106967399A publication Critical patent/CN106967399A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like

Abstract

The invention provides a kind of preparation technology of low-density high-temperature geothermal cement mortar and its cementing method, it is formulated and preparation technology is as follows：G class g cements base is starched：100 parts, 35 parts of silica flour, 20-65 parts of microballon, 100-165 parts of water, 15-35 parts of reinforcing agent, 0.5 part of retarder, 2 parts of fluid loss agent, 1 part of dispersant.Above-mentioned raw materials are put into after being thoroughly mixed in mixer the packing that discharges by proportioning.Its cementing method is as follows：Drilling fluid is pumped into well first, drilling cuttings in well is replaced out, well is cleaned simultaneously, then setting of casing is pumped into bottom plug, insulating liquid, and be pumped into cement mortar to design attitude according to conventional cementing method, it is pumped into top cement plug, drilling fluid again below, when the solidifying 48-72 of time is small after top cement plug bruising, lower drill bit bores plug, continues following stratum and creeps into.This patent can be applied in geothermal well wellbore construction, the cement mortar wastage in well cementation can be controlled, so as to improve cementing quality.

Description

The preparation technology and its cementing method of low-density high-temperature geothermal cement mortar
Technical field
The present invention relates to a kind of preparation technology of cement mortar and its cementing method, especially a kind of low-density high temperature The preparation technology and its cementing method of GEOTHERMAL WATER mud.
Background technology
The matter of utmost importance that geothermal well well cementation faces is that well temperature is higher, generally up to 150 DEG C~300 DEG C, high Temperature has direct influence to the hydrated product of meeting portland cement first, these bad hydrated reaction product meetings The strength character of Behavior of Hardened Cement Paste is reduced, in addition, high temperature can also shorten the setting time of cement mortar, therefore in water filling , it is necessary to inject a large amount of cold water into well and circulate reduction well temperature before mud, and retarder is added, to extend In the setting time of cement mortar, the annular space that cement is injected into sleeve pipe and the borehole wall.
The problem of another needs and solved is that the stratum in geothermal field is all usually typical cranny structure, ground Layer fracture pressure is low, and reservoir has very high permeability, easily causes the generation of leakage situation, in well cementing operation When, the problem of leakage of cement mortar is one very serious.Cement leakage can cause cost of cementing the well into stratum Substantial increase and cause the problems such as cement mortar is low to be returned and pollute water-bearing layer.For example in Nevada, USA Lanshan County In the geothermal well well cementation case in area, the heat reservori lithology in the area is all in the presence of many in loose sedimentary rock, well Individual weak formation and lost-circulation zone, stratum are difficult to bear conventional density 1.9g/cm3With common low-density 1.4~1.7g/cm3Earth heat cement fluid column pressure.
In cementing job, to make the similar regional well cementation problem of solution, minimize leakage, using super The cement mortar of low-density is better method.Also on some special stratum, under balance pressure drilling skill can be used Art, during supporting well cementation, it is desirable to carry out sealing using ultralow density cement slurries, some stratum even require cement Pulp density as little as 1.0g/cm3。
The method that geothermal well had tested some reduction cement densities at present, including addition bentonite, silicon Diatomaceous earth, flyash and perlite.But under the high temperature conditions, these palliatives can be overall to cement mortar Strength characteristics and penetrating power have adverse effect on, and these conventional lightening materials are also difficult to reach super in addition The requirement of low-density cement mortar variable density scope.
The content of the invention
To solve the above problems, the invention provides a kind of preparation technology of low-density high-temperature geothermal cement mortar and Its cementing method.
The preparation technology and its cementing method of the low-density high-temperature geothermal cement mortar of the object of the invention are realized, it is matched somebody with somebody Side and preparation technology are as follows：G class g cements base is starched：100 parts, 35 parts of silica flour, 20-65 parts of microballon, water 100-165 Part, 15-35 parts of reinforcing agent, 0.5 part of retarder, 2 parts of fluid loss agent, 1 part of dispersant.
The silica flour and microballon are reduction cement slurry density material, can be by the density domination of cement mortar 1.0 g/cm3-1.4g/cm3Between.
Above-mentioned raw materials are put into after being thoroughly mixed in mixer the packing that discharges by proportioning.
Its cementing method is as follows：Drilling fluid is pumped into well first, the drilling cuttings in well is replaced out, simultaneously Well is cleaned, then setting of casing to design attitude is pumped into bottom plug, insulating liquid according to conventional cementing method, And be pumped into cement mortar, behind be pumped into top cement plug, drilling fluid again, when waited after top cement plug bruising solidifying 48-72 it is small when, Lower drill bit bores plug, continues following stratum drilling.The low-density high-temperature geothermal cementing concrete pulp density is 1.0 g/cm3-1.4g/cm3Between, after the cement mortar time is solidifying 48-72 hours, fluid loss ＜ 60ml are reached, Compression strength ＞ 10.8Mpa.
This patent can be applied in geothermal well wellbore construction, and can be by density domination 1.0 g/cm3-1.4g/cm3Between, and then the cement mortar wastage in well cementation can be controlled, so as to improve well cementation matter Amount.
Embodiment
The preparation technology and its cementing method of the low-density high-temperature geothermal cement mortar of the present invention, it is formulated and prepared Technique is as follows：G class g cements base is starched：100 parts, 35 parts of silica flour, 20-65 parts of microballon, 100-165 parts of water, 15-35 parts of reinforcing agent, 0.5 part of retarder, 2 parts of fluid loss agent, 1 part of dispersant.
The silica flour and microballon are reduction cement slurry density material, can be by the density domination of cement mortar 1.0 g/cm3-1.4g/cm3Between.
Above-mentioned raw materials are put into after being thoroughly mixed in mixer the packing that discharges by proportioning.
Its cementing method is as follows：Drilling fluid is pumped into well first, the drilling cuttings in well is replaced out, simultaneously Well is cleaned, then setting of casing to design attitude is pumped into bottom plug, insulating liquid according to conventional cementing method, And be pumped into cement mortar, behind be pumped into top cement plug, drilling fluid again, when waited after top cement plug bruising solidifying 48-72 it is small when, Lower drill bit bores plug, continues following stratum drilling.The low-density high-temperature geothermal cementing concrete pulp density is 1.0 g/cm3-1.4g/cm3Between, after the cement mortar time is solidifying 48-72 hours, fluid loss ＜ 60ml are reached, Compression strength ＞ 10.8Mpa.
The above-described embodiments are merely illustrative of preferred embodiments of the present invention, not to this hair Bright scope is defined, under the premise of design spirit of the present invention is not departed from, this area ordinary skill technology people Various modifications and improvement that member makes to technical solution of the present invention, all should fall into claims of the present invention true In fixed protection domain.

Claims (2)

1. the preparation technology of low-density high-temperature geothermal cement mortar, it is characterised in that：Its formula is as follows：G grades of water Mud base is starched：100 parts, 35 parts of silica flour, 20-65 parts of microballon, 100-165 parts of water, reinforcing agent 15-35 Part, 0.5 part of retarder, 2 parts of fluid loss agent, 1 part of dispersant.
2. the cementing method of low-density high-temperature geothermal cement mortar, it is characterised in that：Its cementing method is as follows： Drilling fluid is pumped into well first, the drilling cuttings in well is replaced out, while cleaning well, setting of casing is to setting Count position, bottom plug, insulating liquid be then pumped into according to conventional cementing method, and be pumped into cement mortar, behind again Top cement plug, drilling fluid are pumped into, when the solidifying 48-72 of time is small after top cement plug bruising, lower drill bit bores plug, under continuation Face stratum is crept into, and the low-density high-temperature geothermal cementing concrete pulp density is in 1.0g/cm3-1.4g/cm3It Between, after the cement mortar time is solidifying 48-72 hours, reach fluid loss ＜ 60ml, compression strength ＞ 10.8Mpa.
CN201610018914.XA 2016-01-13 2016-01-13 The preparation technology and its cementing method of low-density high-temperature geothermal cement mortar Pending CN106967399A (en)

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Application Number Priority Date Filing Date Title
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107313747A (en) * 2017-08-17 2017-11-03 李建峰 One kind only takes hot ground hot hole pore-fixing device and the method for not fetching water
CN110965959A (en) * 2018-09-28 2020-04-07 中国石油天然气股份有限公司 Cementing plug method capable of controlling plug surface and used for easy-spraying and easy-leaking stratum well cementation
CN112408881A (en) * 2020-11-20 2021-02-26 成都理工大学 Temporary plugging type high-permeability porous cement-based material suitable for medium-low temperature geothermal well and preparation method thereof
CN112664160A (en) * 2020-12-25 2021-04-16 中煤地质集团有限公司 Broken rock stratum well cementation method
CN113338849A (en) * 2021-07-13 2021-09-03 中石化石油工程技术服务有限公司 Well cementation method for high-temperature oil and gas well
CN114753762A (en) * 2022-05-07 2022-07-15 山西省勘察设计研究院有限公司 Drilling process for middle-deep geothermal well drilling construction
CN116023071A (en) * 2021-10-25 2023-04-28 中石化石油工程技术服务有限公司 Ultralow-density cement paste system and ultralow-density cement paste additive
US11926787B2 (en) 2019-06-24 2024-03-12 Petrochina Company Limited Well cementing method for improving well cementing quality by controlling hydration heat of cement slurry

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CN101747009A (en) * 2009-12-04 2010-06-23 四川嘉华企业（集团）股份有限公司 High-temperature low-density cement and applications thereof
CN102585789A (en) * 2012-02-10 2012-07-18 成都欧美科石油科技股份有限公司 High temperature resistance low-density high-strength cement paste
CN102660241A (en) * 2012-05-11 2012-09-12 无锡维视科技有限公司 High temperature-resistant oil well cement, underground high temperature-resistant oil well cement paste and well cementation process method
CN102827592A (en) * 2012-09-03 2012-12-19 中国海洋石油总公司 High-temperature-resistant long-thickening-time cement slurry
CN103059824A (en) * 2013-01-16 2013-04-24 西南石油大学 First boundary casing anti-corrosion cement slurry for well cementation and preparation method thereof
CN103305197A (en) * 2013-06-08 2013-09-18 西南石油大学 Cement paste toughening agent and application of cement paste toughening agent in preparation of cementing flexible cement paste
CN103589409A (en) * 2012-08-16 2014-02-19 中国石油化工股份有限公司 Oil well cement lightening agent, and preparation method and applications thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101747009A (en) * 2009-12-04 2010-06-23 四川嘉华企业（集团）股份有限公司 High-temperature low-density cement and applications thereof
CN102585789A (en) * 2012-02-10 2012-07-18 成都欧美科石油科技股份有限公司 High temperature resistance low-density high-strength cement paste
CN102660241A (en) * 2012-05-11 2012-09-12 无锡维视科技有限公司 High temperature-resistant oil well cement, underground high temperature-resistant oil well cement paste and well cementation process method
CN103589409A (en) * 2012-08-16 2014-02-19 中国石油化工股份有限公司 Oil well cement lightening agent, and preparation method and applications thereof
CN102827592A (en) * 2012-09-03 2012-12-19 中国海洋石油总公司 High-temperature-resistant long-thickening-time cement slurry
CN103059824A (en) * 2013-01-16 2013-04-24 西南石油大学 First boundary casing anti-corrosion cement slurry for well cementation and preparation method thereof
CN103305197A (en) * 2013-06-08 2013-09-18 西南石油大学 Cement paste toughening agent and application of cement paste toughening agent in preparation of cementing flexible cement paste

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107313747A (en) * 2017-08-17 2017-11-03 李建峰 One kind only takes hot ground hot hole pore-fixing device and the method for not fetching water
CN110965959A (en) * 2018-09-28 2020-04-07 中国石油天然气股份有限公司 Cementing plug method capable of controlling plug surface and used for easy-spraying and easy-leaking stratum well cementation
CN110965959B (en) * 2018-09-28 2022-03-29 中国石油天然气股份有限公司 Cementing plug method capable of controlling plug surface and used for easy-spraying and easy-leaking stratum well cementation
US11926787B2 (en) 2019-06-24 2024-03-12 Petrochina Company Limited Well cementing method for improving well cementing quality by controlling hydration heat of cement slurry
CN112408881A (en) * 2020-11-20 2021-02-26 成都理工大学 Temporary plugging type high-permeability porous cement-based material suitable for medium-low temperature geothermal well and preparation method thereof
CN112408881B (en) * 2020-11-20 2021-08-31 成都理工大学 Temporary plugging type high-permeability porous cement-based material suitable for medium-low temperature geothermal well and preparation method thereof
CN112664160A (en) * 2020-12-25 2021-04-16 中煤地质集团有限公司 Broken rock stratum well cementation method
CN112664160B (en) * 2020-12-25 2022-11-18 中煤地质集团有限公司 Broken rock stratum well cementation method
CN113338849A (en) * 2021-07-13 2021-09-03 中石化石油工程技术服务有限公司 Well cementation method for high-temperature oil and gas well
CN113338849B (en) * 2021-07-13 2022-12-30 中石化石油工程技术服务有限公司 Well cementation method for high-temperature oil and gas well
CN116023071A (en) * 2021-10-25 2023-04-28 中石化石油工程技术服务有限公司 Ultralow-density cement paste system and ultralow-density cement paste additive
CN114753762A (en) * 2022-05-07 2022-07-15 山西省勘察设计研究院有限公司 Drilling process for middle-deep geothermal well drilling construction

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