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CN103865501A - Low-density cement paste for salt-cavern gas storage well cementation - Google Patents

Low-density cement paste for salt-cavern gas storage well cementation Download PDF

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Publication number
CN103865501A
CN103865501A CN201410072012.5A CN201410072012A CN103865501A CN 103865501 A CN103865501 A CN 103865501A CN 201410072012 A CN201410072012 A CN 201410072012A CN 103865501 A CN103865501 A CN 103865501A
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China
Prior art keywords
salt
cement
density
gas storage
low
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Pending
Application number
CN201410072012.5A
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Chinese (zh)
Inventor
连进报
陈�光
褚军杰
曹乐陶
杨增民
尹璇
刘红祥
姚泊汗
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CNPC Bohai Drilling Engineering Co Ltd
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CNPC Bohai Drilling Engineering Co Ltd
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Publication date
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Priority to CN201410072012.5A priority Critical patent/CN103865501A/en
Publication of CN103865501A publication Critical patent/CN103865501A/en
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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
    • 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
    • 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
    • C04B28/04—Portland 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
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/40—Surface-active agents, dispersants
    • C04B2103/408—Dispersants
    • 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
    • C04B2103/50—Defoamers, air detrainers

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Structural Engineering (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)

Abstract

The invention discloses a low-density cement paste system for salt-cavern gas storage well cementation. The low-density cement paste system is composed of an oil well cement, a superfine cement, a lightening admixture, a salt resisting and water-loss reducing agent, a defoamer and a saline, and used for gas storage well cementation in a rock salt formation. Due to use of a special salt resisting ingredient, the corrosion of the cement paste to the wall of a salt deposit well is retarded, adverse impact of the salt rock diffusing to the cement paste on the properties of the cement paste is reduced, and such technical problems affecting the quality of sealing and cementation in well cementation as retarded coagulation and extra retarded coagulation of cement paste, and low strength of set cement are well solved.

Description

Salt hole gas storage well cementation low-density cement mortar
Technical field
The present invention relates to Cementing grout, particularly a kind of salt hole gas storage well cementation low-density cement mortar.
Background technology
Along with exploratory development deepens continuously, salt hole gas storage well increases in a large number.Because the salt on salt hole gas storage well salt rock stratum is soluble in water, chance water diffusibility is extremely strong, if use fresh water cement slurry cementing, borehole wall rock salt will be to grout rapid diffusion, makes grout worsened by pollution, performance and even occurs that sudden strain of a muscle is solidifying, causes well cementation accident; Use salt saturated slurry can effectively suppress rock salt diffusion, but hydrated cementitious is out of control, is prone to slow setting and super slow setting, causes cement strength lower, affects sleeve pipe and stratum glue bonding quality, does not reach sealing requirement.Especially the low-density cement mortar that Absorption Wells of Low Pressure leakproof is used, except being subject to the impact of rock salt diffusion, due to low at interval isolation top ground temperature, grout aquation is slow, thickening time overlength, cement strength is lower, has a strong impact on and presses steady anti-channeling and follow-up construction.
How developing one can effectively suppress rock salt diffusion, avoid occurring dodging solidifying, super slow setting, thickening time is adjustable as required, the low-density cement mortar of Rapid Establishment cement strength at a lower temperature again, a large amount of discussions this are all carried out both at home and abroad, there are a lot of achievements, solved some salt rock stratum well cementation difficult problems.But be mostly that suppressing rock salt with salt saturated slurry spreads to grout, there is no the short solidifying hardening accelerator of anti-salt of better performances under low temperature, can not solve long, the late-blooming problem of early strength of thickening time.
Summary of the invention
The object of the invention is the feature for salt hole gas storage well stratum, provide a kind of and do not use anti-salt hardening accelerator and make Behavior of Hardened Cement Paste there is the low-density cement mortar of higher-strength and suitable thickening time.
Salt hole gas storage well cementation low-density cement mortar of the present invention, utilize hydration characteristics and the grain composition principle of salt concn to hydrated cementitious influencing characteristic, different fineness cement, formulated by the ultra-fine oil well cement of silicate G level high resistance sulphur type, light-weight additive, anti-salt water retaining, dispersion agent etc.Concrete technical scheme is as follows:
A kind of salt hole gas storage well cementation low-density cement mortar, is characterized in that, is prepared from by the component of following weight part:
Described cement is the ultra-fine oil well cement of silicate G level high resistance sulphur type, density 3.15g/cm 3; Superfine cement is the ultra-fine oil well cement of silicate G level high resistance sulphur type, and fineness is 800-100 order, density 3.15g/cm 3.
Described light-weight additive is oil well cementing cenosphere;
Described water retaining is anti-salt water retaining;
Described dispersion agent is anti-dipersant;
The NaCl solution that described water with slurry is 7wt%～10wt%.
Beneficial effect of the present invention is as follows:
1) cement slurry property improves: this mortar architecture density is 1.45～1.65g/cm 3, API dehydration≤50ml, bleed≤1ml, degree of mobilization is 20～23cm, meets salt hole gas storage well cementing requirements;
2) adopt and be bordering on the half-full salt water management low-density cement mortar thickening time of closing, reduce the impact of rock salt on grout time of coagulation, intensity, solved preferably the grout slow setting, super slow setting, the cement strength that occur in the well cementation technical barrier that affects sealing quality such as low;
3) adopt silicate G level high resistance sulphur type oil well cement, superfine cement and hollow float bead to carry out tightly packed, improve the tap density of system, reduce free water, short solidifying carrying by force, be conducive to the firm borehole wall, solved anti-salt hardening accelerator to the short solidifying technical barrier of pretending with undesirable of carrying of low-density cement mortar;
4) do not use hardening accelerator, reduced production cost.
Embodiment
Below in conjunction with specific embodiment, grout of the present invention is elaborated.
In following examples:
Water with slurry used is NaCl solution, can adopt Industrial Salt and fresh water to be made into.
Used oil well cement, ultra-fine oil well cement, light-weight additive, water retaining, dispersion agent, defoamer are commercially available prod, include but not limited to following several:
Used oil well cement is magnificent oily board silicate G level high resistance sulphur type oil well cement, and density is 3.15g/cm 3;
Ultra-fine oil well wawter bloom oil board mud used is the ultra-fine oil well cement of silicate G level high resistance sulphur type, fineness 800-1000 order, density 3.15g/cm 3;
Light-weight additive used is " the oil well cement cenosphere " that Gongyi branch office of Beijing Tianhe Fuhua Technology Co., Ltd. produces, fineness 0.315mm, density≤0.8g/cm 3;
Water retaining used is the anti-salt water retaining Jss that cementing technology company of Tianjin Zhongyou Boxing Engineering Technology Co., Ltd. produces.
Dispersion agent used is the anti-dipersant Fss that cementing technology company of Tianjin Zhongyou Boxing Engineering Technology Co., Ltd. produces.
Defoamer used is the defoamer D50 that cementing technology company of Tianjin Zhongyou Boxing Engineering Technology Co., Ltd. produces.
When use, according to proportioning, the ultra-fine oil well cement of silicate G level high resistance sulphur type, cenosphere are dry mixed to the mixed ash of even formation; Jss, Fss, Industrial Salt are sneaked into and in fresh water, formed water with slurry.When construction, will mix ash in proportion and water with slurry is puddled to needs density with cementing truck, inject into well, complete mixture, the construction of low-density cement mortar.
Example 1:
By 75 parts of (weight parts, as follows) oil well cement, 25 parts of ultra-fine oil well cements, 30 parts float pearl and puddle evenly, put into the water with slurry by the NaCl solution composition of the water retaining Jss of 3.0 parts, the dispersion agent Fss of 1.5 parts, 61.5 parts of 7wt%, under 4000 revs/min of speed, in corrugation agitator, stir 60 seconds the low-density cement mortar that acquisition density is 1.45g/cm3.
Under 65 ℃ of temperature, 25MPa condition, carry out performance test according to GB GB10238-2005 " oil well cement ", test result is in table 1.
Example 2:
By 25 parts of (weight parts, as follows) oil well cement, 75 parts of ultra-fine oil well cements, 10 parts float pearl and puddle the mixed ash of even formation, by 3 parts of Jss, 1.5 parts of Fss, 0.3 part of defoamer D50, the NaCl solution of 61.5 parts of 7wt% stirs 60 seconds with 4000 revs/min of speed in corrugation agitator, and obtaining density is 1.65g/cm 3low-density cement mortar.
Carry out properties experiment according to API standard, test result is in table 1.
Table 1
Figure BDA0000471288840000041
As shown in Table 1, this mortar architecture density is 1.45～1.65g/cm 3, API dehydration≤50ml, bleed < 1ml, degree of mobilization is 20～23cm, initial consistency < 20Bc, the over-all propertieies such as rheological, sedimentation stability are better, meet construction needs.
With the increasing of superfine cement and G level oil well cement part by weight, thickening time minimizing, ultimate compression strength raise, and can need to change both ratios according to well cementation, obtain the thickening time and the ultimate compression strength that need.
Through too much mouthful salt hole gas storage well Cementing application test, the whole high-qualitys of cementing quality.

Claims (6)

1. a salt hole gas storage well cementation low-density cement mortar, is characterized in that, is prepared from by the component of following weight part:
2. salt hole gas storage well cementation low-density cement mortar as claimed in claim 1, is characterized in that: described oil well cement is silicate G level high resistance sulphur type oil well cement, density 3.15g/cm 3; Described superfine cement is the ultra-fine oil well cement of silicate G level high resistance sulphur type, and fineness is 800-100 order, density 3.15g/cm 3.
3. salt hole gas storage cementing slurry as claimed in claim 1, is characterized in that: described light-weight additive is oil well cement cenosphere.
4. salt hole gas storage well cementation low-density cement mortar as claimed in claim 1, is characterized in that: described water retaining is anti-salt water retaining.
5. salt hole gas storage well cementation low-density cement mortar as claimed in claim 1, is characterized in that: described dispersion agent is anti-dipersant.
6. salt hole gas storage well cementation low-density cement mortar as claimed in claim 1, is characterized in that: the NaCl solution that described water with slurry is 7～10wt%.
CN201410072012.5A 2014-02-28 2014-02-28 Low-density cement paste for salt-cavern gas storage well cementation Pending CN103865501A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106396509A (en) * 2016-08-06 2017-02-15 中国石油集团长城钻探工程有限公司固井公司 A low-density high-strength cement mortar system wide in application range
CN110357460A (en) * 2019-07-11 2019-10-22 葛洲坝石门特种水泥有限公司 A kind of oil-well cement and preparation method thereof suitable for saline bed well cementing operation
CN111747712A (en) * 2020-07-16 2020-10-09 辽宁昆成实业有限公司 Plugging cement paste system suitable for petroleum well workover of Yaojia stratum
CN111848056A (en) * 2020-08-09 2020-10-30 辽宁昆成实业有限公司 Plugging cement slurry system suitable for petroleum well workover with low and medium fracture pressure in ceramic group of library
CN113548838A (en) * 2020-04-23 2021-10-26 中石化石油工程技术服务有限公司 Fresh water salt-resistant tough cement slurry for gas storage

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6874578B1 (en) * 1999-02-25 2005-04-05 Schlumberger Technology Corporation Cementing compositions and application of such compositions to cementing oil wells or the like
CN1919963A (en) * 2006-08-11 2007-02-28 中国石油天然气股份有限公司 Salt water cement slurry suitable for salt cavern gas storage
CN101126018A (en) * 2006-08-15 2008-02-20 中国石油天然气集团公司 Low-temperature hardening scurry-proof cement slurry for well cementing
CN101134892A (en) * 2007-10-09 2008-03-05 中国石油大学(华东) Deepwater well cementing mortar architecture
CN102585790A (en) * 2011-12-16 2012-07-18 中国石油大学(华东) Cement slurry system suitable for long cementing section well cementing job

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6874578B1 (en) * 1999-02-25 2005-04-05 Schlumberger Technology Corporation Cementing compositions and application of such compositions to cementing oil wells or the like
CN1919963A (en) * 2006-08-11 2007-02-28 中国石油天然气股份有限公司 Salt water cement slurry suitable for salt cavern gas storage
CN101126018A (en) * 2006-08-15 2008-02-20 中国石油天然气集团公司 Low-temperature hardening scurry-proof cement slurry for well cementing
CN101134892A (en) * 2007-10-09 2008-03-05 中国石油大学(华东) Deepwater well cementing mortar architecture
CN102585790A (en) * 2011-12-16 2012-07-18 中国石油大学(华东) Cement slurry system suitable for long cementing section well cementing job

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
尹学源: "地下储气库盐穴及盐层固井技术", 《石油钻采工艺》, vol. 29, no. 01, 25 February 2007 (2007-02-25) *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106396509A (en) * 2016-08-06 2017-02-15 中国石油集团长城钻探工程有限公司固井公司 A low-density high-strength cement mortar system wide in application range
CN106396509B (en) * 2016-08-06 2019-03-26 中国石油集团长城钻探工程有限公司固井公司 A kind of low density and high strength cement slurry system applied widely
CN110357460A (en) * 2019-07-11 2019-10-22 葛洲坝石门特种水泥有限公司 A kind of oil-well cement and preparation method thereof suitable for saline bed well cementing operation
CN113548838A (en) * 2020-04-23 2021-10-26 中石化石油工程技术服务有限公司 Fresh water salt-resistant tough cement slurry for gas storage
CN113548838B (en) * 2020-04-23 2022-11-04 中石化石油工程技术服务有限公司 Fresh water salt-resistant tough cement slurry for gas storage
CN111747712A (en) * 2020-07-16 2020-10-09 辽宁昆成实业有限公司 Plugging cement paste system suitable for petroleum well workover of Yaojia stratum
CN111848056A (en) * 2020-08-09 2020-10-30 辽宁昆成实业有限公司 Plugging cement slurry system suitable for petroleum well workover with low and medium fracture pressure in ceramic group of library

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