CN104263335A - Low-density early-strength micro-expanding cement mortar and preparation method thereof - Google Patents
Low-density early-strength micro-expanding cement mortar and preparation method thereof Download PDFInfo
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- CN104263335A CN104263335A CN201410432172.6A CN201410432172A CN104263335A CN 104263335 A CN104263335 A CN 104263335A CN 201410432172 A CN201410432172 A CN 201410432172A CN 104263335 A CN104263335 A CN 104263335A
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- weight
- low density
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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
- C09K8/487—Fluid loss control additives; Additives for reducing or preventing circulation loss
-
- 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
Abstract
The invention discloses a low-density early-strength micro-expanding cement mortar, which is composed of the following components in parts by weight: 100 parts of G-grade oil well cement, 50 to 150 parts of lightening additive, 5 to 50 parts of stabilizer, 3 to 8 parts of early strength agent, 3 to 8 parts of expanding agent, 4 to 10 parts of filtrate reducer, 0.2 to 1 part of dispersant, 0.02 to 0.2 part of antifoaming agent, and 100 to 350 parts of water. The invention also provides a preparation method of the cement mortar. The cement mortar has the advantages of low density and stable structure, after solidification the cement block has large compression strength, and thus the cement mortar can be applied to well solidification operation which is carried out in the low pressure leakage zone and the low pressure oil-gas layer.
Description
Technical field
The present invention relates to field of oil drilling, particularly relate to a kind of low density early strength micro expansion grout and preparation method thereof.
Background technology
At present, in oily district's exploratory development process, the well cementing operation relating to thief formation and low pressure reservoir gets more and more, and in order to prevent leakage and pollute in well cementing operation, requires the density reducing grout, carries out the sealing of layer position with low-density cement mortar.But grout reduces simultaneously in density, its performance also often declines thereupon, shows cement paste rheological, bad stability, and dehydration is difficult to control; Behavior of Hardened Cement Paste ultimate compression strength significantly reduces, and perviousness improves, and is difficult to reach sealing requirement.Specifically, current domestic pharmaceutical industry is applied comparatively ripe low weight cement slurry and is mainly adopted flyash, wilkinite and drift pearl etc. as lightening material, but adopt the lightening material such as flyash and wilkinite, cement slurry density only can be adjusted to 1.45 ~ 1.75g/cm
3, and adopt drift pearl as light-weight additive, there is again the shortcomings such as frangible, easy layering, cause stability to reduce.Therefore, be necessary to provide a kind of to have compared with low density and the large early strength micro expansion grout of Stability Analysis of Structures, Behavior of Hardened Cement Paste ultimate compression strength, to meet the well cementing operation of thief formation and low pressure reservoir.
Summary of the invention
An object of the present invention is to provide and a kind ofly to have compared with low density and the large low density early strength micro expansion grout of Stability Analysis of Structures, Behavior of Hardened Cement Paste ultimate compression strength, the well cementing operation of thief formation and low pressure reservoir can be met.
Another object of the present invention is to provide a kind of preparation method of low density early strength micro expansion grout.
For this reason, technical scheme of the present invention is as follows:
Described low density early strength micro expansion grout is made up of the component of following weight part:
By said components Homogeneous phase mixing, make low density early strength micro expansion grout, mixing can be aided with stirring, such as, stir 60 seconds with the rotating speed of 4000 revs/min.
Described light-weight additive is 1:(0.1 ~ 1.0 by glass microballon, superfine active slag, flyash according to weight ratio): (0.4 ~ 3.0) forms.For obtaining better effect, glass microballon selects the product of Minnesota Mining and Manufacturing Company, and model is S38HS, and its particle size is normal distribution, and ultimate compression strength reaches 38MPa, spherical complete, and oilness is good; Superfine active slag has thinner particle diameter, and can interact with hardening accelerator, improves the getting up early intensity of cement; Flyash has certain anti-channeling performance, effectively can reduce the generation of waiting oil gas water breakthrough phenomenon in solidifying process.Above-mentioned three kinds of components, by the proportioning of technical solution of the present invention, can realize preferably grain composition, and the Behavior of Hardened Cement Paste of formation has stronger ultimate compression strength and lower rate of permeation, and can reduce the density difference of grout.
Described stablizer is mesoporous nano silicon dioxide (MCM-41), the ordered mesoporous material of to be median size be 80 ~ 150nm, structure has six side's ordered arrangement ducts, size is even, and aperture can regulate continuously within the scope of 2-10nm, specific surface area is large.The particle diameter of MCM-41 is 1/200 ~ 1/100 of cement granules particle diameter, thus can the gap of filling concrete and lightening material, makes Behavior of Hardened Cement Paste finer and close.In addition, MCM-41 surface, containing abundant Si-OH key, has the ability of strong adsorbed water molecule, grout can be made to form stable suspension system, improves the stability of grout further.
Described hardening accelerator is 2:(0.1 ~ 0.3 by calcium sulfate, calcium carbonate, SODIUMNITRATE and trolamine by weight): (1 ~ 2): (0.05 ~ 0.20) mixes obtained.
Described swelling agent is 1:(1 ~ 1.5 by the plaster of Paris, magnesium oxide, calcium oxide and silica flour by weight): (0.5 ~ 1): (0.5 ~ 1.2) mixes obtained.
Described water retaining is oil well cement water retaining BXF-200L.
Described dispersion agent is that sodium polystyrene sulfonate and calcium lignin sulphonate obtain by weight for 1:2 mixing.
Described defoamer is tributyl phosphate.
On this basis, the formula following (by weight) of preferred low density early strength micro expansion grout:
Wherein, in light-weight additive, the weight ratio of glass microballon, superfine active slag, flyash is 1:(0.3 ~ 0.6): (1 ~ 3).
The low density early strength micro expansion grout obtained by technical solution of the present invention has compared with low density and Stability Analysis of Structures, solidify after Behavior of Hardened Cement Paste ultimate compression strength large.Compared with conventional cement slurries, described low density early strength micro expansion grout is more suitable for middle low temperature well cementing operation, and under low temperature, early strength is high, curing time is short, little moisture loss, can effectively prevent oil gas water breakthrough; Adopt MCM-41 as stablizer, have the ability of strong adsorbed water molecule, mortar architecture stability is higher; There is microdilatancy powerful early, can prevent in grout process of setting because grout shrinks the annular space and oil gas water breakthrough caused.
Embodiment
Embodiment 1
Low density early strength micro expansion grout is made up through Homogeneous phase mixing of the component of following weight part, and mixing process is stir 60 seconds with the rotating speed of 4000 revs/min on constant speed stirrer.
Wherein, light-weight additive is that 1:0.4:2.5 forms by glass microballon, superfine active slag, flyash according to weight ratio.
Similarly, in embodiment 2 ~ 5, low density early strength micro expansion grout is respectively by the component Homogeneous phase mixing obtained (table 1) of following weight part.
Each component proportion of low density early strength micro expansion grout in table 1 embodiment 2 ~ 5
Note: a: weight part; B: glass microballon: superfine active slag: flyash (weight ratio)
Performance test
By grout obtained for above-mentioned 5 embodiments according to API normative testing properties, test result is in table 2.
The performance index of table 2 embodiment 1 ~ 5 each sample
As can be seen from the above table, Behavior of Hardened Cement Paste is in 48h ultimate compression strength all higher than 15MPa, and compressive property is excellent; The equal > 20cm of grout degree of mobilization, sedimentation stability cement slurry density difference≤0.02g/cm
3, cement slurry water loss≤50ml, free liquid≤0.2%, water retaining can control dehydration at below 50ml, and These parameters shows that the rheological of cement is good, and slurry is stablized and little moisture loss; The rate of expansion of grout, about 0.8%, shows the performance of the good microdilatancy of grout tool, can effectively prevent because grout shrinks the annular space and oil gas water breakthrough caused; Cement slurry density prepared by present method can be low to moderate 1.05g/cm
3, along with the reduction of cement slurry density, the indices of grout slightly declines, but still can meet construction requirement.
Claims (10)
1. a low density early strength micro expansion grout, is characterized in that: obtained by the component Homogeneous phase mixing of following weight part:
2. low density early strength micro expansion grout according to claim 1, is characterized in that: described light-weight additive is 1:(0.1 ~ 1.0 by glass microballon, superfine active slag, flyash according to weight ratio): (0.4 ~ 3.0) forms.
3. low density early strength micro expansion grout according to claim 1, is characterized in that: described hardening accelerator is 2:(0.1 ~ 0.3 by calcium sulfate, calcium carbonate, SODIUMNITRATE and trolamine by weight): (1 ~ 2): (0.05 ~ 0.20) mixes obtained.
4. low density early strength micro expansion grout according to claim 1, is characterized in that: described swelling agent is 1:(1 ~ 1.5 by the plaster of Paris, magnesium oxide, calcium oxide and silica flour by weight): (0.5 ~ 1): (0.5 ~ 1.2) mixes obtained.
5. low density early strength micro expansion grout according to claim 1, is characterized in that: described water retaining is BXF-200L type oil well cement water retaining.
6. low density early strength micro expansion grout according to claim 1, is characterized in that: described dispersion agent is obtained by weight for 1:2 mixes by sodium polystyrene sulfonate and calcium lignin sulphonate; Described stablizer is mesoporous nano silicon dioxide; Described defoamer is tributyl phosphate.
7. the low density early strength micro expansion grout according to any one in claim 1 ~ 7, is characterized in that: described component carries out proportioning by following weight part:
Described light-weight additive is 1:(0.3 ~ 0.6 by glass microballon, superfine active slag, flyash according to weight ratio): (1 ~ 3).
8. a preparation method for low density early strength micro expansion grout described in claim 1, is characterized in that: described G level oil well cement, light-weight additive, stablizer, hardening accelerator, swelling agent, water retaining, dispersion agent, defoamer and water make grout through Homogeneous phase mixing.
9. the preparation method of low density early strength micro expansion grout according to claim 8, is characterized in that: described Homogeneous phase mixing is be uniformly mixed 60 seconds with the rotating speed of 4000 revs/min.
10. the preparation method of low density early strength micro expansion grout according to claim 8 or claim 9, is characterized in that: described light-weight additive is 1:(0.1 ~ 1.0 by glass microballon, superfine active slag, flyash according to weight ratio): (0.4 ~ 3.0) forms; Described hardening accelerator is 2:(0.1 ~ 0.3 by calcium sulfate, calcium carbonate, SODIUMNITRATE and trolamine by weight): (1 ~ 2): (0.05 ~ 0.20) mixes obtained; Described swelling agent is 1:(1 ~ 1.5 by the plaster of Paris, magnesium oxide, calcium oxide and silica flour by weight): (0.5 ~ 1): (0.5 ~ 1.2) mixes obtained; Described stablizer is mesoporous nano silicon dioxide; Described water retaining is BXF-200L type oil well cement water retaining; Described dispersion agent is obtained by weight for 1:2 mixes by sodium polystyrene sulfonate and calcium lignin sulphonate; Described defoamer is tributyl phosphate.
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105255465A (en) * | 2015-11-17 | 2016-01-20 | 嘉华特种水泥股份有限公司 | Floating-bead-free low-density oil well cement paste |
| CN105385427A (en) * | 2015-10-30 | 2016-03-09 | 卫辉市化工有限公司 | Ocean deep water surface layer cementing cement paste system and preparing method thereof |
| CN105462571A (en) * | 2015-11-16 | 2016-04-06 | 中国石油大学(华东) | Low-temperature cementing slurry system and composition thereof |
| CN106520083A (en) * | 2016-09-30 | 2017-03-22 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | Moderate-and-high-temperature oil well cement fluid loss additive and preparation method thereof |
| CN106630806A (en) * | 2017-01-06 | 2017-05-10 | 中国海洋石油总公司 | Cement mixed component and application thereof |
| CN106892594A (en) * | 2017-02-20 | 2017-06-27 | 中国石油化工股份有限公司 | A kind of microdilatancy toughness reinforcing cement mortar and preparation method thereof |
| CN106967393A (en) * | 2017-04-19 | 2017-07-21 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of curable low-density plugging operation liquid and preparation method thereof |
| CN107033869A (en) * | 2017-04-22 | 2017-08-11 | 西南石油大学 | A kind of nanometer Delayed Release Breaker and preparation method thereof |
| CN108395882A (en) * | 2017-05-31 | 2018-08-14 | 宁夏亿昀特种工程材料有限公司 | Well cementation light weight cement |
| CN108395132A (en) * | 2017-05-31 | 2018-08-14 | 宁夏亿昀特种工程材料有限公司 | Oil-well cement mitigation extra material |
| CN108395154A (en) * | 2017-05-31 | 2018-08-14 | 宁夏亿昀特种工程材料有限公司 | Well cementation light weight cement |
| CN108395881A (en) * | 2017-05-31 | 2018-08-14 | 宁夏亿昀特种工程材料有限公司 | Oil-well cement mitigation extra material |
| CN109943302A (en) * | 2019-03-28 | 2019-06-28 | 长江大学 | A kind of chemical plugging rubber plug and its preparation method and application |
| CN111646737A (en) * | 2020-06-15 | 2020-09-11 | 西南石油大学 | Low-density cement paste system |
| CN111825399A (en) * | 2019-09-12 | 2020-10-27 | 尧柏特种水泥技术研发有限公司 | Low-thixotropy low-density high-strength cement paste |
| CN112390659A (en) * | 2019-08-15 | 2021-02-23 | 中国石油化工股份有限公司 | Cement paste system |
| CN113443851A (en) * | 2021-06-23 | 2021-09-28 | 贵州石博士科技股份有限公司 | Composite solid nano-based early strength agent and preparation method thereof |
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Cited By (21)
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|---|---|---|---|---|
| CN105385427A (en) * | 2015-10-30 | 2016-03-09 | 卫辉市化工有限公司 | Ocean deep water surface layer cementing cement paste system and preparing method thereof |
| CN105462571A (en) * | 2015-11-16 | 2016-04-06 | 中国石油大学(华东) | Low-temperature cementing slurry system and composition thereof |
| CN105462571B (en) * | 2015-11-16 | 2018-06-29 | 中国石油大学(华东) | A kind of low temperature well cementing mortar architecture and composition |
| CN105255465B (en) * | 2015-11-17 | 2018-12-14 | 嘉华特种水泥股份有限公司 | A kind of no floating bead low-density oil-well cement slurry |
| CN105255465A (en) * | 2015-11-17 | 2016-01-20 | 嘉华特种水泥股份有限公司 | Floating-bead-free low-density oil well cement paste |
| CN106520083A (en) * | 2016-09-30 | 2017-03-22 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | Moderate-and-high-temperature oil well cement fluid loss additive and preparation method thereof |
| CN106630806A (en) * | 2017-01-06 | 2017-05-10 | 中国海洋石油总公司 | Cement mixed component and application thereof |
| CN106630806B (en) * | 2017-01-06 | 2019-04-26 | 中国海洋石油集团有限公司 | A kind of cement mixing component and its application |
| CN106892594A (en) * | 2017-02-20 | 2017-06-27 | 中国石油化工股份有限公司 | A kind of microdilatancy toughness reinforcing cement mortar and preparation method thereof |
| CN106967393A (en) * | 2017-04-19 | 2017-07-21 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of curable low-density plugging operation liquid and preparation method thereof |
| CN107033869A (en) * | 2017-04-22 | 2017-08-11 | 西南石油大学 | A kind of nanometer Delayed Release Breaker and preparation method thereof |
| CN108395132A (en) * | 2017-05-31 | 2018-08-14 | 宁夏亿昀特种工程材料有限公司 | Oil-well cement mitigation extra material |
| CN108395881A (en) * | 2017-05-31 | 2018-08-14 | 宁夏亿昀特种工程材料有限公司 | Oil-well cement mitigation extra material |
| CN108395154A (en) * | 2017-05-31 | 2018-08-14 | 宁夏亿昀特种工程材料有限公司 | Well cementation light weight cement |
| CN108395882A (en) * | 2017-05-31 | 2018-08-14 | 宁夏亿昀特种工程材料有限公司 | Well cementation light weight cement |
| CN109943302A (en) * | 2019-03-28 | 2019-06-28 | 长江大学 | A kind of chemical plugging rubber plug and its preparation method and application |
| CN109943302B (en) * | 2019-03-28 | 2021-01-26 | 长江大学 | Chemical plugging rubber plug and preparation method and application thereof |
| CN112390659A (en) * | 2019-08-15 | 2021-02-23 | 中国石油化工股份有限公司 | Cement paste system |
| CN111825399A (en) * | 2019-09-12 | 2020-10-27 | 尧柏特种水泥技术研发有限公司 | Low-thixotropy low-density high-strength cement paste |
| CN111646737A (en) * | 2020-06-15 | 2020-09-11 | 西南石油大学 | Low-density cement paste system |
| CN113443851A (en) * | 2021-06-23 | 2021-09-28 | 贵州石博士科技股份有限公司 | Composite solid nano-based early strength agent and preparation method thereof |
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