CN101974318B - Low-temperature early strength agent for deepwater cementing - Google Patents
Low-temperature early strength agent for deepwater cementing Download PDFInfo
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- CN101974318B CN101974318B CN 201010293396 CN201010293396A CN101974318B CN 101974318 B CN101974318 B CN 101974318B CN 201010293396 CN201010293396 CN 201010293396 CN 201010293396 A CN201010293396 A CN 201010293396A CN 101974318 B CN101974318 B CN 101974318B
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- Prior art keywords
- low
- early strength
- strength agent
- temperature early
- cementing
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Classifications
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
Abstract
The invention discloses a low-temperature early strength agent for deepwater cementing, which comprises the following components of 50-80 percent by weight of sodium sulfate and 20-50 percent by weight of sodium silicate. The low-temperature early strength agent can ensure that 3.5MPa strength for supporting a sleeve is formed after being placed at a low temperature of 10 DEG C after 14h, 6.5MPa strength is obtained after 24h, and 19.6MPa high strength is obtained in a cement block after 3 days.
Description
Technical field
The present invention relates to a kind of deep water cementing low-temperature early strength agent.
Background technology
The ocean deepwater oil development is the key areas of petroleum resources exploitation in the Future in China quite a while, and the low temperature well cementing technology is exactly one of requisite important and gordian technique wherein.The characteristics of ocean deepwater are low temperature, high pressure, sometimes usually are attended by low formation-parting pressure, shallow-layer stream and gas hydrate.When the depth of water reaches 800～1200 meters, the mud line temperature only has about 10 ℃, when the depth of water reaches 1500～2000 meters, the mud line temperature only has about 3 ℃, Main Problems is exactly the aquation that low temperature has delayed oil well cement under the low temperature environment, affected the development of Behavior of Hardened Cement Paste ultimate compression strength, particularly under approximate 0 ℃ low temperature environment, common " G " level oil well cement has almost stopped aquation, curing reaction, drilling well, well cementing operation can't be proceeded, had a strong impact on exploitation, the exploitation of country at the deep water petroleum resources.
The present hardening accelerator of the domestic raising Behavior of Hardened Cement Paste early strength of using when having more 20 ℃～40 ℃, but still also not for 15 ℃ of ocean deepwater low temperature or near employed low temperature, very low temperature hardening accelerator under 10 ℃ the low temperature environment.
In addition, common " G " level oil well cement is 10 ℃ of low temperature or more under the low temperature environment, and hydrated cementitious speed slowly or is hardly carried out hydration reaction generally speaking, and the Behavior of Hardened Cement Paste early strength is low, and 8hr even 24hr can't form active strength, and operation can't be carried out smoothly.
Summary of the invention
Problem for the prior art existence, the object of the present invention is to provide a kind of deep water cementing low-temperature early strength agent, can form the 3.5MPa intensity of supporting sleeve in 14 hours in 10 ℃ of situations of low temperature, reach 6.5MPa in 24 hours, three days cement block intensity reach the high strength of 19.6MPa.
A kind of deep water cementing of the present invention comprises with low-temperature early strength agent: sodium sulfate 50～80%, water glass 20～50%, wherein, described per-cent is weight percentage.
Preferably, the modulus of described water glass is 2.9～3.5.
Low-temperature early strength agent of the present invention has following advantage:
1) can be in 10 ℃ of situations of low temperature form the 3.5MPa intensity of supporting sleeve in 14 hours, reached 6.5MPa in 24 hours, three days cement block intensity reach the high strength of 19.6MPa;
2) the present invention is applicable to international G level, A level oil well cement, can with ilmenite powder, ground barium sulfate, flyash, float pearl, as native isodensity conditioning agent use together, to make the grout that meets the different densities requirement, to water quality without particular requirement;
3) existing hardening accelerator major part has the serious phenomenon of thickening, and contains the existence to the serious chlorion of Corrosion Of Steel, and hardening accelerator thickening phenomenon of the present invention is not obvious, good water solubility, and also chloride ion-containing not is conducive to protect oil well casing;
4) hardening accelerator of the present invention is cheap, and material source is extensive, even cheaper than the price of a lot of existing hardening accelerator;
5) hardening accelerator of the present invention is nontoxic, to the environmental nonpollution that uses.
Embodiment
Embodiment 1
In the present embodiment, be 50% sodium sulfate (Na with weight percent
2SO
4) and 50% water glass (Na
4SiO
4) mixing formation deep water cementing low-temperature early strength agent.
Wherein, if sodium sulfate adopts industrial sample, sodium sulfate quality mark 〉=98.0% just can satisfy performance requriements of the present invention so, and according to GB/T6009-2003, the acceptable end product in the II class and I series products all meet performance requriements of the present invention.
In addition, it is 2.9～3.5 requirement that the water glass that adopts need to satisfy modulus.As adopt industrial water glass as shown in table 1 below also passable.
The specific targets requirement of the applicable industrial water glass of the present invention of table 1
Per-cent in the table 1 is weight percentage.
Water glass of the present invention can adopt following method to make: be that 1: 1 quartzy rock dust and caustic soda is placed in the pressure cooker with weight ratio, press fully under 2～3 normal atmosphere and steam reaction.
The hardening accelerator that the present embodiment is made adds in common " G " level oil well cement according to 3～4% (weight percents), under 10 ℃ of environment of low temperature, thickening time by 12 hours of the common hardening accelerator of original interpolation not multiviscosisty foreshorten to multiviscosisty about 4 hours, formed effective anti-channeling intensity of 116Pa in 8 hours, formed the 3.5MPa intensity of supporting sleeve in 14 hours, reached 6.5MPa in 24 hours, three days cement block intensity reach the high strength of 19.6MPa.
Embodiment 2
In the present embodiment, be 80% sodium sulfate (Na with weight percent
2SO
4) and 20% water glass (Na
4SiO
4) mixing formation deep water cementing low-temperature early strength agent.
Remaining step is with embodiment 1.
The prepared hardening accelerator of the present embodiment has the effect suitable with embodiment 1.
Embodiment 3
In the present embodiment, be 70% sodium sulfate (Na with weight percent
2SO
4) and 30% water glass (Na
4SiO
4) mixing formation deep water cementing low-temperature early strength agent.
Remaining step is with embodiment 1.
The prepared hardening accelerator of the present embodiment has the effect suitable with embodiment 1.
Claims (1)
1. deep water cementing low-temperature early strength agent comprises: sodium sulfate 50～80%, water glass 20～50%, and wherein, described per-cent is weight percentage, and the modulus of described water glass is 2.9～3.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010293396 CN101974318B (en) | 2010-09-27 | 2010-09-27 | Low-temperature early strength agent for deepwater cementing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010293396 CN101974318B (en) | 2010-09-27 | 2010-09-27 | Low-temperature early strength agent for deepwater cementing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101974318A CN101974318A (en) | 2011-02-16 |
| CN101974318B true CN101974318B (en) | 2013-02-13 |
Family
ID=43574231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010293396 Active CN101974318B (en) | 2010-09-27 | 2010-09-27 | Low-temperature early strength agent for deepwater cementing |
Country Status (1)
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| CN (1) | CN101974318B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104194752B (en) * | 2014-08-01 | 2016-11-23 | 中国石油天然气集团公司 | Coal bed gas well well cementation low-temperature early strength agent and containing its cement paste for well cementation |
| CN105236530B (en) * | 2015-09-09 | 2017-11-28 | 天津工业大学 | One kind processing food sewage flocculant and preparation method and application |
| CN107987813B (en) * | 2016-10-27 | 2020-08-11 | 中国石油化工股份有限公司 | Polymer supported coagulant, preparation method thereof and cement paste |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101456685A (en) * | 2009-01-04 | 2009-06-17 | 武汉理工大学 | Anti-crack alkalis excited ecological cement |
| CN101508553A (en) * | 2009-03-27 | 2009-08-19 | 徐东亮 | Light energy conservation insulating concrete |
-
2010
- 2010-09-27 CN CN 201010293396 patent/CN101974318B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101456685A (en) * | 2009-01-04 | 2009-06-17 | 武汉理工大学 | Anti-crack alkalis excited ecological cement |
| CN101508553A (en) * | 2009-03-27 | 2009-08-19 | 徐东亮 | Light energy conservation insulating concrete |
Non-Patent Citations (2)
| Title |
|---|
| 混凝土添加剂开发与应用;秦伟程;《化工中间体》;20031231(第2/3期);第30-33页 * |
| 秦伟程.混凝土添加剂开发与应用.《化工中间体》.2003,(第2/3期),第30-33页. |
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|---|---|
| CN101974318A (en) | 2011-02-16 |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: China Oilfield Services Limited Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: China Oilfield Services Limited Patentee before: China National Offshore Oil Corporation |
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| CP01 | Change in the name or title of a patent holder |