CN107200520A - Deep well cementing weighted cement slurry system - Google Patents
Deep well cementing weighted cement slurry system Download PDFInfo
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- CN107200520A CN107200520A CN201710505596.4A CN201710505596A CN107200520A CN 107200520 A CN107200520 A CN 107200520A CN 201710505596 A CN201710505596 A CN 201710505596A CN 107200520 A CN107200520 A CN 107200520A
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- cement
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- deep well
- density
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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
- 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
-
- 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
- C09K8/48—Density increasing or weighting additives
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
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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)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
Abstract
The invention discloses deep well cementing weighted cement slurry system, including following components：Cement, heavy weight additive, dispersant, fluid loss agent, high-temperature stabilizer, micro- silicon, retarder, the quality of the heavy weight additive accounts for 50% the 300% of cement quality, the quality of dispersant accounts for 0.4% the 8% of cement quality, the quality of fluid loss agent accounts for 2% the 10% of cement quality, the quality of high-temperature stabilizer accounts for 50% the 70% of cement quality, the quality of micro- silicon accounts for 20% the 30% of cement quality, and the quality of retarder accounts for 0.1% the 8% of cement quality.Present invention defines the variable density scope of high-density cement mortar, it is ensured that high-density cement mortar has preferable performance, so as to solve deep well cementing strata pressure height, unbalanced problem.
Description
Technical field
The present invention relates to a kind of mortar architecture, and in particular to deep well cementing weighted cement slurry system.
Background technology
Well cementation is to be drilled an indispensable important step during well operations, and it includes setting of casing and cementing.Gu
Well technology is multi-disciplinary comprehensive application technology, with systematicness, the disposable and time is short the characteristics of.The main purpose of well cementation is
Sleeve pipe in protection and support Oil/gas Well, insulates the stratum such as oil, gas and water.Cement mortar is the working solution used in cementing the well.
In recent years, as Domestic Oil And Gas Fields are explored and development deepens continuously, deep ＆ ultra-deep well quantity is more and more.
Well depth is increasingly deeper, strata pressure more and more higher, and strata pressure is high, during well cementation can not equilibrium strata pressure, easily there is overflow
Or the phenomenon of channelling.
The content of the invention
The technical problems to be solved by the invention are that deep well cementing strata pressure is high, and well cementation is difficult, it is therefore intended that provide deep
Well well cementation weighted cement slurry system, solves deep well cementing strata pressure height, unbalanced problem.
The present invention is achieved through the following technical solutions：
Deep well cementing weighted cement slurry system, including following components：Cement, heavy weight additive, dispersant, fluid loss agent,
High-temperature stabilizer, micro- silicon, retarder, the quality of the heavy weight additive account for the 50%-300% of cement quality, and the quality of dispersant is accounted for
The 0.4%-8% of cement quality, the quality of fluid loss agent accounts for the 2%-10% of cement quality, and the quality of high-temperature stabilizer accounts for cement
The 50%-70% of quality, the quality of micro- silicon accounts for the 20%-30% of cement quality, and the quality of retarder accounts for cement quality
0.1%-8%.Also include 0.5%-0.8% defoamer.
The present invention utilizes the closelypacked theoretical density for improving cement mortar, heavy weight additive, micro- silicon, the granularity of high-temperature stabilizer
Difference, in the preparation of cement mortar, the particle of small grain size can fill the space between bulky grain, improve the same of cement slurry density
When can improve the intensity of cement mortar；Improving the viscosity of cement mortar after cement slurry density can uprise, and dispersant is used to reduce cement
The viscosity of slurry, micro- silicon improves the intensity of cement mortar as filler, and high-temperature stabilizer is starched for stabilizing cement, it is to avoid cement mortar
Occurs substantially sedimentation；Retarder is used for the thickening time for extending cement mortar.The density of high-density cement mortar is generally greater than 1.98g/
cm3, the density of cement mortar is higher, and the viscosity of cement mortar is bigger, and cement mortar slurry is more unstable easy to be settled；Therefore, no
Heavy weight additive can be mixed simply come improve cement by density, therefore, the density of high-density cement mortar has certain restriction model
Enclose；Heavy weight additive, dispersant, fluid loss agent, high-temperature stabilizer, micro- silicon, the dosage of retarder are adjusted according to the density of cement mortar.
Therefore, the present invention devises a set of weighted cement slurry system, and present invention defines the variable density scope of high-density cement mortar；
It ensure that high-density cement mortar has preferable performance；So as to solve deep well cementing strata pressure height, unbalanced problem；It is high
Density cement slurry being capable of balancing layer pressure, compression bottom.
The heavy weight additive uses granularity for the barite of the mesh of 150 mesh -200.The quality of the heavy weight additive accounts for G grades of oil-well cements
The 100%-300% of quality.Barite chemical property is stable, water insoluble and hydrochloric acid, nonmagnetic and toxicity, and density is big, is water
The conventional heavy weight additive of mud, is easy to get on the market.The density of barite is low compared with the density of inorganic mineral heavy weight additive, therefore, uses
Single barite is as heavy weight additive, it is necessary to properly increase the dosage of heavy weight additive.Due to dispersant, fluid loss agent, high-temperature stable
Agent, micro- silicon, retarder granularity it is small, it is therefore, particles filled close from the barite of the mesh of 150 mesh -200.
The cement includes one or both of fine cement, G grade oil-well cements and compounded.Fine cement granularity is small, tool
There is certain thickening power；The mobility of cement mortar can be adjusted by changing the type of cement.
The present invention compared with prior art, has the following advantages and advantages：
1st, deep well cementing of the present invention defines the variable density scope of high-density cement mortar with weighted cement slurry system, protects
Having demonstrate,proved high-density cement mortar has preferable performance, so as to solve deep well cementing strata pressure height, unbalanced problem；
2nd, deep well cementing of the present invention applied widely, the good combination property of weighted cement slurry system；
3rd, deep well cementing of the present invention is being easy to get on the market with the material selected in weighted cement slurry system, compound method letter
It is single.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment, to present invention work
Further to describe in detail, exemplary embodiment and its explanation of the invention is only used for explaining the present invention, is not intended as to this
The restriction of invention.
Embodiment 1
Deep well cementing of the present invention weighted cement slurry system, including following components：Cement, heavy weight additive, dispersant, drop are lost
Aqua, high-temperature stabilizer, micro- silicon, retarder, the quality of the heavy weight additive account for the 50%-300% of cement quality, the matter of dispersant
Amount accounts for the 0.4%-8% of cement quality, and the quality of fluid loss agent accounts for the 2%-10% of cement quality, and the quality of high-temperature stabilizer is accounted for
The 50%-70% of cement quality, the quality of micro- silicon accounts for the 20%-30% of cement quality, and the quality of retarder accounts for cement quality
0.1%-8%.Also include 0.5%-0.8% defoamer.The cement includes one kind in fine cement, G grades of oil-well cements
Or two kinds of compoundings.Fine cement granularity is small, with certain thickening power；Cement mortar can be adjusted by changing the type of cement
Mobility.
The present invention utilizes the closelypacked theoretical density for improving cement mortar, heavy weight additive, micro- silicon, the granularity of high-temperature stabilizer
Difference, in the preparation of cement mortar, the particle of small grain size can fill the space between bulky grain, improve the same of cement slurry density
When can improve the intensity of cement mortar；Improving the viscosity of cement mortar after cement slurry density can uprise, and dispersant is used to reduce cement
The viscosity of slurry, micro- silicon improves the intensity of cement mortar as filler, and high-temperature stabilizer is starched for stabilizing cement, it is to avoid cement mortar
Occurs substantially sedimentation；Retarder is used for the thickening time for extending cement mortar.The density of high-density cement mortar is generally greater than 1.98g/
cm3, the density of cement mortar is higher, and the viscosity of cement mortar is bigger, and cement mortar slurry is more unstable easy to be settled；Therefore, no
Heavy weight additive can be mixed simply come improve cement by density, therefore, the density of high-density cement mortar has certain restriction model
Enclose；Heavy weight additive, dispersant, fluid loss agent, high-temperature stabilizer, micro- silicon, the dosage of retarder are adjusted according to the density of cement mortar.
Therefore, the present invention devises a set of weighted cement slurry system, and present invention defines the variable density scope of high-density cement mortar；
It ensure that high-density cement mortar has preferable performance；So as to solve deep well cementing strata pressure height, unbalanced problem；It is high
Density cement slurry being capable of balancing layer pressure, compression bottom.
Embodiment 2
Based on embodiment 1, the heavy weight additive uses granularity for the barite of the mesh of 150 mesh -200.The quality of the heavy weight additive
Account for the 100%-300% of G grades of oil-well cement quality.Barite chemical property is stable, water insoluble and hydrochloric acid, nonmagnetic and poison
Property, density is the conventional heavy weight additive of cement mortar greatly, is easy to get on the market.The density of barite is close compared with inorganic mineral heavy weight additive
Degree is low, therefore, using single barite as heavy weight additive, it is necessary to properly increase the dosage of heavy weight additive.Because dispersant, drop are lost
Aqua, high-temperature stabilizer, micro- silicon, retarder granularity it is small, it is therefore, particles filled tight from the barite of the mesh of 150 mesh -200
It is close.
Above-described embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that the embodiment that the foregoing is only 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 and improvements done etc. all should be included
Within protection scope of the present invention.
Claims (5)
1. deep well cementing weighted cement slurry system, it is characterised in that including following components：Cement, heavy weight additive, dispersant,
Fluid loss agent, high-temperature stabilizer, micro- silicon, retarder, the quality of the heavy weight additive account for the 50%-300% of cement quality, dispersant
Quality account for the 0.4%-8% of cement quality, the quality of fluid loss agent accounts for the 2%-10% of cement quality, the matter of high-temperature stabilizer
Amount accounts for the 50%-70% of cement quality, and the quality of micro- silicon accounts for the 20%-30% of cement quality, and the quality of retarder accounts for cementaceous
The 0.1%-8% of amount.
2. deep well cementing according to claim 1 weighted cement slurry system, it is characterised in that the heavy weight additive is used
Granularity is the barite of the mesh of 150 mesh -200.
3. deep well cementing according to claim 1 or 2 weighted cement slurry system, it is characterised in that also include
0.5%-0.8% defoamer.
4. deep well cementing according to claim 2 weighted cement slurry system, it is characterised in that the matter of the heavy weight additive
Amount accounts for the 100%-300% of G grades of oil-well cement quality.
5. deep well cementing according to claim 1 weighted cement slurry system, it is characterised in that the cement includes micro-
One or both of thin cement, G grade oil-well cements are compounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710505596.4A CN107200520A (en) | 2017-06-28 | 2017-06-28 | Deep well cementing weighted cement slurry system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710505596.4A CN107200520A (en) | 2017-06-28 | 2017-06-28 | Deep well cementing weighted cement slurry system |
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| CN107200520A true CN107200520A (en) | 2017-09-26 |
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| CN201710505596.4A Pending CN107200520A (en) | 2017-06-28 | 2017-06-28 | Deep well cementing weighted cement slurry system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114455895A (en) * | 2022-02-25 | 2022-05-10 | 辽宁昆成实业有限公司 | Three-body cement slurry for repairing operation heavy oil well tail pipe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1865185A (en) * | 2005-05-21 | 2006-11-22 | 新疆石油管理局钻井工艺研究院 | High density concrete slurry |
| CN102604614A (en) * | 2012-02-15 | 2012-07-25 | 成都欧美科石油科技股份有限公司 | Anti-flow cementing slurry for well cementation |
| CN104371678A (en) * | 2014-11-06 | 2015-02-25 | 中国石油天然气集团公司 | Expanded flexible well cementing grout and preparation method thereof |
| CN105038743A (en) * | 2015-06-11 | 2015-11-11 | 成都欧美克石油科技有限公司 | High-density cement slurry suitable for shale gas cementing and preparation method of high-density cement slurry |
| CN105038745A (en) * | 2015-05-19 | 2015-11-11 | 成都欧美克石油科技有限公司 | Novel liquid silicon anti-channeling cement slurry used in well cementation |
-
2017
- 2017-06-28 CN CN201710505596.4A patent/CN107200520A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1865185A (en) * | 2005-05-21 | 2006-11-22 | 新疆石油管理局钻井工艺研究院 | High density concrete slurry |
| CN102604614A (en) * | 2012-02-15 | 2012-07-25 | 成都欧美科石油科技股份有限公司 | Anti-flow cementing slurry for well cementation |
| CN104371678A (en) * | 2014-11-06 | 2015-02-25 | 中国石油天然气集团公司 | Expanded flexible well cementing grout and preparation method thereof |
| CN105038745A (en) * | 2015-05-19 | 2015-11-11 | 成都欧美克石油科技有限公司 | Novel liquid silicon anti-channeling cement slurry used in well cementation |
| CN105038743A (en) * | 2015-06-11 | 2015-11-11 | 成都欧美克石油科技有限公司 | High-density cement slurry suitable for shale gas cementing and preparation method of high-density cement slurry |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114455895A (en) * | 2022-02-25 | 2022-05-10 | 辽宁昆成实业有限公司 | Three-body cement slurry for repairing operation heavy oil well tail pipe |
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Application publication date: 20170926 |
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