CN101463248A - Low temperature low density oil well cement for deep sea - Google Patents
Low temperature low density oil well cement for deep sea Download PDFInfo
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- CN101463248A CN101463248A CNA200710050944XA CN200710050944A CN101463248A CN 101463248 A CN101463248 A CN 101463248A CN A200710050944X A CNA200710050944X A CN A200710050944XA CN 200710050944 A CN200710050944 A CN 200710050944A CN 101463248 A CN101463248 A CN 101463248A
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Abstract
The invention belongs to a low temperature and density oil well cement used in deep sea, which is composed of a cement material, a lightening material, a dispersing agent and a cement reinforcing agent. The oil well cement is characterized in that the cement material in the ingredients is low temperature rapid hardening substrate cement, the difficult problem of cementing of well at low temperature in the deep sea is solved by mixing the lightening material, the dispersing agent and the cement reinforcing agent at the time of manufacturing the product; on conditions of 5 DEG C, normal pressure and 8 hours, the strength of the cement can reach over 3.5MPa, the density of cement slurry is controlled in a range of 1.48-1.52 g/cm<3>, the mobility of the cement slurry is not less than 220mm, thus meeting the demands of cementing of well drilling in the deep sea.
Description
Technical field
The present invention relates to oil well cement, particularly a kind of marine low temperature, easy low temperature low density oil well cement for deep sea on broken stratum of can be used for.
Background technology
Marine oil--particularly deep-sea oil is the key areas of Future in China energy development, the ocean deepwater drilling exploitation relates to a series of correlation technique, need the present state-of-the-art technique means of utilization, and the ocean deepwater low temperature well cementing is exactly one of most important and crucial technology wherein.Difficulty and problem that ocean deepwater cementing operation at present faces mainly contain: 1. seabed low temperature.The seabed formation temperature reduces along with sea water advanced increase, and generally about 5 ℃, in some special areas, when the degree of depth arrived the seabed mud moisture interface, seawater temperature may drop to about 0 ℃ construction operation district bottom-water temperature now.2. low fracture pressure gradient.The stratum that sea bed is following mainly is the mud shale that loosens, and the fracture pressure gradient on stratum itself is just very low like this, adds the weight of sea water column, makes that the stratum is difficult to support, and capacity caves in.3. the influence of shallow fluid layer.The seabed special geological condition, the shallow fluid layer of a large amount of high pressure usually lies dormant, the oceanogenic sedimentation compacting effort is closed the shallow seated groundwater air ring in certain structure, the overweight pressure-bearing in top makes this turbidity current sand bed become one and crosses ballast carrier, when this sand bed is arrived in drilling well, be this high pressure saliferous sand bed the passage of a release is provided, produce serious accident.4. environmental protection policy.Ocean deepwater is the place that human footprint did not relate to, and the well cementing operation process should be used lifeless matter toxicity, and has the material of biodegradability, effectively protects the marine eco-environment.
Owing to above reason, the deep sea drilling needs of cementing operations shortens the well cementation cycle as early as possible, requires the performance of grout early strength fast, the intensity height.The early strength performance is slower at low temperatures for conventional oil well cement, and intensity is also on the low side, and the admixture lightening material has further reduced early strength again, can not be used for the deep-sea well cementation.If employing API series oil well cement adds the method for admixture, must add a large amount of setting accelerator, can cause grout to solidify very soon, can't guarantee the mixed replacement of mixing of grout, therefore need to add retardant again and regulate the thickening time, do not reach the well cementation effect.The fast hard base material cement of existing low temperature mainly is with anhydrous calcium sulphoaluminate (3CaO3Al
2O
3CaSO
4) mineral are main, add a certain amount of gypsum and blended material, grinding is to specific surface area 400-450m
2/ kg has at low temperatures the characteristics of fast hard, strong, high-strength, microdilatancy early, can satisfy the high requirement of well cementation early strength low temperature under, but fast because of its hydration rate, the thickening time weak point still can not be directly used in the cementing operation under the deep sea low temperature special conditions.
For solving these complexcase that run in the deep-sea well cementation process, improve cementing quality, reduce the well cementation accident, generally adopt the mortar architecture of foam low-temperature low-density grout at present abroad as deep water cementing.As a cover foamed cement slurry system, need employ huge equipment during operation at the scene and relate to a series of problems such as rear supply, the construction technology complexity, changing factor is many, and well cementation has a big risk.
Summary of the invention
The objective of the invention is to develop a kind of low temperature low density oil well cement for deep sea for the needs that satisfy the deep sea low temperature well cementation, it has remedied the deficiency of existing foamed low density oil well cement in the well cementation of deep-sea, simplify the site operation difficulty, reduce deep-sea cementing operation risk.
Purpose of the present invention is achieved through the following technical solutions:
A kind of low temperature low density oil well cement for deep sea, by cement material, lightening material, dispersion agent and cement intensifier are formed, wherein lightening material is a microballon, float a kind of or its mixture in the pearl, how dispersion agent is for being dispersion agent (SPF) or keto-aldehyde condenses dispersion agent (JZ-1), cement intensifier is a carbonate, it is characterized in that the cement material in the described component is the fast hard base material cement of low temperature, content is 45～80%, when product preparation, be mixed into 20～53% lightening material, 0～1% dispersion agent and 0～1% cement intensifier, described content is weight percent content, the main physical parameters of described low temperature low density oil well cement for deep sea is: water-solid ratio is 0.7 o'clock, and the cement slurry density of preparation is 1.50 ± 0.02g/cm
3, grout degree of mobilization 〉=220mm, under 5 ℃, normal pressure, 8 hours conditions, cement strength 〉=3.5MPa.
The technological process of production and the production unit of the production technique of low temperature low density oil well cement for deep sea and equipment and existing oil well cement are basic identical.The base material cement specific surface area requires 400-450m
2/ kg prepares and puddles evenly by component and gets final product.
The low temperature low density oil well cement for deep sea that the present invention proposes has solved the difficult problem of cementing operation under the deep sea low temperature condition, has significant advantage and special-effect:
One, compare with conventional oil well cement, overcome the deficiency that conventional oil well cement strength development is slow, density is high, under 5 ℃ temperature, normal pressure, 8 hours conditions, grout intensity can reach more than the 3.5Mpa, and cement slurry density is controlled at 1.50 ± 0.02g/cm
3In the scope, satisfied the requirement of deep-sea well cementation.
Two, adopt the fast hard base material cement of low temperature as base water mud material of the present invention, by adding lightening material, dispersion agent and cement intensifier, changed the physicals of the fast hard base material cement of existing low temperature, produced new technique effect, both satisfied and cemented the well under the deep sea low temperature condition the particular requirement of grout intensity, its cement consistency is reduced, has the suitable thickening time, increase its flowability, be beneficial to pumping, and the intensity that has further increased cement stone, satisfy requirement and the construction requirement of stratum, deep-sea to the cement grout column pressure fully, this also is the fast hard base material cement of existing low temperature is used for cementing operation under deep sea low temperature new research and application.
Embodiment
Embodiment 1, and cement of the present invention consists of: the fast hard base material cement 69.0% of low temperature, lightening material (microballon) 29.45% mixes dispersion agent (SPF dispersion agent) 0.85% and cement intensifier (carbonate toughener) 0.7%, and fully puddles evenly.The low temperature low density oil well cement for deep sea of this composition detects through physicals, is 0.7 o'clock in water-solid ratio, and the cement slurry density of preparation is 1.50g/cm
3, the grout degree of mobilization is 230mm, under 5 ℃, normal pressure, 8 hours conditions, cement strength is 3.7MPa.
Embodiment 2, consist of: press the fast hard base material cement 64.5% of low temperature, lightening material (microballon) 34.0%, mix dispersion agent (SPF) 0.85% and cement intensifier (carbonate) 0.65%, fully puddle evenly, the low temperature low density oil well cement for deep sea of this composition detects through physicals, is 0.7 o'clock in water-solid ratio, and the cement slurry density of preparation is 1.49g/cm
3, degree of mobilization is 243mm, under 5 ℃, normal pressure, 8 hours conditions, cement strength is 4.5MPa.
Lightening material of the present invention can adopt microballon, float a kind of or its mixture in the pearl, and how dispersion agent is dispersion agent (SPF) or keto-aldehyde condenses dispersion agent (JZ-1) if can adopting, all can reach the technical requirement and the effect of design.
The requirement that all is above standard of the technical indicator of above embodiment, under the temperature conditions of normal well site, mortar architecture has mixing about 60～150min does time, and cement slurry density is 1.50 ± 0.02g/cm
3, degree of mobilization 〉=220mm, under 5 ℃, normal pressure, 8 hours conditions, cement strength 〉=3.5MPa satisfies every technical requirement of deep-sea well cementation fully.
Claims (1)
1, a kind of low temperature low density oil well cement for deep sea, by cement material, lightening material, dispersion agent and cement intensifier are formed, wherein lightening material is a microballon, float a kind of or its mixture in the pearl, how dispersion agent is for being dispersion agent (SPF) or keto-aldehyde condenses dispersion agent (JZ-1), cement intensifier is a carbonate, it is characterized in that the cement material in the described component is the fast hard base material cement of low temperature, content is 45～80%, when product preparation, be mixed into 20～53% lightening material, 0～1% dispersion agent and 0～1% cement intensifier, described content is weight percent content, the main physical parameters of described low temperature low density oil well cement for deep sea is: water-solid ratio is 0.7 o'clock, and the cement slurry density of preparation is 1.50 ± 0.02g/cm
3, grout degree of mobilization 〉=220mm, under 5 ℃, normal pressure, 8 hours conditions, cement strength 〉=3.5MPa.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710050944 CN101463248B (en) | 2007-12-21 | 2007-12-21 | Low temperature low density oil well cement for deep sea |
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|---|---|---|---|
| CN 200710050944 CN101463248B (en) | 2007-12-21 | 2007-12-21 | Low temperature low density oil well cement for deep sea |
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| CN101463248A true CN101463248A (en) | 2009-06-24 |
| CN101463248B CN101463248B (en) | 2013-07-17 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102250598A (en) * | 2011-05-27 | 2011-11-23 | 中国石油集团川庆钻探工程有限公司 | Expandable low-density cement paste and preparation method thereof |
| CN103601430A (en) * | 2013-11-20 | 2014-02-26 | 山东理工大学 | Method of preparing low-density well cementation cement check block of oil well by utilizing silicon carbide ceramic microbeads |
| CN103819150A (en) * | 2014-03-05 | 2014-05-28 | 山东理工大学 | Preparation method for oil well cementing cement briquette by adopting tungsten carbide silicon dioxide composite ceramics micro-beads |
| CN104263331B (en) * | 2014-09-24 | 2017-06-09 | 中国石油大学(华东) | A kind of new type high temperature low weight cement slurry |
| CN106866086A (en) * | 2017-03-20 | 2017-06-20 | 嘉华特种水泥股份有限公司 | A kind of low-density oil-well cement |
| CN107311578A (en) * | 2017-06-16 | 2017-11-03 | 成都金玉雄辉建筑工程有限公司 | A kind of push pipe concrete for deep ocean work |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1810915A (en) * | 2006-02-24 | 2006-08-02 | 西南石油学院 | Comprehensive performace regulator for well cementing cement slurry and its prepn |
| EP1770073A1 (en) * | 2005-09-29 | 2007-04-04 | Services Petroliers Schlumberger | Cement composition for a carbon dioxide supercritical environment |
-
2007
- 2007-12-21 CN CN 200710050944 patent/CN101463248B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1770073A1 (en) * | 2005-09-29 | 2007-04-04 | Services Petroliers Schlumberger | Cement composition for a carbon dioxide supercritical environment |
| CN1810915A (en) * | 2006-02-24 | 2006-08-02 | 西南石油学院 | Comprehensive performace regulator for well cementing cement slurry and its prepn |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102250598A (en) * | 2011-05-27 | 2011-11-23 | 中国石油集团川庆钻探工程有限公司 | Expandable low-density cement paste and preparation method thereof |
| CN103601430A (en) * | 2013-11-20 | 2014-02-26 | 山东理工大学 | Method of preparing low-density well cementation cement check block of oil well by utilizing silicon carbide ceramic microbeads |
| CN103601430B (en) * | 2013-11-20 | 2015-03-11 | 山东理工大学 | Method of preparing low-density well cementation cement check block of oil well by utilizing silicon carbide ceramic microbeads |
| CN103819150A (en) * | 2014-03-05 | 2014-05-28 | 山东理工大学 | Preparation method for oil well cementing cement briquette by adopting tungsten carbide silicon dioxide composite ceramics micro-beads |
| CN103819150B (en) * | 2014-03-05 | 2015-05-06 | 山东理工大学 | Preparation method for oil well cementing cement briquette by adopting tungsten carbide silicon dioxide composite ceramics micro-beads |
| CN104263331B (en) * | 2014-09-24 | 2017-06-09 | 中国石油大学(华东) | A kind of new type high temperature low weight cement slurry |
| CN106866086A (en) * | 2017-03-20 | 2017-06-20 | 嘉华特种水泥股份有限公司 | A kind of low-density oil-well cement |
| CN106866086B (en) * | 2017-03-20 | 2019-05-14 | 嘉华特种水泥股份有限公司 | A kind of low-density oil-well cement |
| CN107311578A (en) * | 2017-06-16 | 2017-11-03 | 成都金玉雄辉建筑工程有限公司 | A kind of push pipe concrete for deep ocean work |
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|---|---|
| CN101463248B (en) | 2013-07-17 |
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Owner name: JIAHUA SPECIAL CEMENT CO., LTD. Free format text: FORMER NAME: SICHUAN JIAHUA ENTERPRISE (GROUP) CORP., LTD. |
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Address after: 614003 Ma'anshan City, Sichuan Province, No. nine Feng Road, No. 2, Patentee after: Jia Hua special cement incorporated company Address before: 614003 Ma'anshan City, Sichuan Province, No. nine Feng Road, No. 2, Patentee before: Sichuan Jiahua Enterprise (Group) Co., Ltd. |