CN109880604A - A kind of oil-well cement solidifying type early strength agent of weak rush - Google Patents
A kind of oil-well cement solidifying type early strength agent of weak rush Download PDFInfo
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- CN109880604A CN109880604A CN201910119546.1A CN201910119546A CN109880604A CN 109880604 A CN109880604 A CN 109880604A CN 201910119546 A CN201910119546 A CN 201910119546A CN 109880604 A CN109880604 A CN 109880604A
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Abstract
The invention discloses a kind of oil-well cements to promote solidifying type early strength agent with weak, and the early strength agent contains following components: in parts by weight, 30~70 parts of nano material, 20~50 parts of inorganic salts, 5~20 parts of organic salt, 5~30 parts of drag reducer；Wherein nano material is selected from the mixture of fibrous structure nano material and laminated structure nano material.Oil-well cement of the present invention promotees solidifying type early strength agent with weak, cement slurry thickening time is influenced slight, but the early strength of Behavior of Hardened Cement Paste can be dramatically increased, show the solidifying high early strong performance of weak rush, and cement slurry stability can be improved, to cement slurry, other performances have no adverse effects, and have good comprehensive performance.
Description
Technical field
The present invention relates to a kind of oil-well cements to promote solidifying type early strength agent with weak, belongs to oilfield well completion technology well cementation field.
Background technique
With the process of petroleum exploration and development, various bad grounds are increasingly encountered, along with people are to well cementation matter
The compression for measuring desired raising and operating cost, brings stern challenge to cementing technology.Behavior of Hardened Cement Paste compression strength is to influence admittedly
The important indicator of well quality and subsequent well, exploitation.Behavior of Hardened Cement Paste compression strength reaches 3.5MPa ability supporting sleeve and is formed
Axial load, and meet continue drilling require；Cement strength reach 7MPa or more cement sheath just and have it is preferable cementing and
Sealing performance.If cement strength is lower than the rupture strength of required fracturing stratum, the desired effect of pressure break is not only not achieved, instead
And the cement sheath of vicinity can be destroyed.Therefore, the intensity for effectively improving Behavior of Hardened Cement Paste is of great significance.
Low-density cement mortar technology is to solve the problems, such as the effective means of low pressure and easy leaking layer well cementation, but compress due to investing, mesh
The preceding common low weight cement slurry performance of each elephant is also had too many difficulties to cope with, and the low problem of cement strength especially highlights, shadow
Ring pack quality.Especially as the development of one-time up-return technology, Behavior of Hardened Cement Paste strength development is slow at the top of long cementing interval well, or even goes out
The noncondensing problem of existing cement slurry long-time.In addition, the sealing Behavior of Hardened Cement Paste early strength hair on some marine, land surface layers, skill set
Exhibition is slow, and curing time is long, is not able to satisfy fast drilling requirement, increases operating cost.
In well cementation field, early strength agent is often referred to as coagulant, and the two is not obviously distinguished, be refer to shorten cement slurry it is thick
A kind of additive changed the time, accelerate cement setting and hardening.It is also to improve Behavior of Hardened Cement Paste compression strength most at present that coagulant, which is added,
Common method.But routine coagulant can often be obviously shortened cement slurry thickening time at present, simultaneously to Behavior of Hardened Cement Paste early stage humidification
It is unobvious, it is low cannot to solve the problems, such as that the above oil gas well cementing operation faces intensity very well.Some oil/gas wells are in order to meet construction requirement
With reduce cost, also require cement slurry to rapidly develop in the case where having the longer thickening time to certain early strength.This
The addition of sample routine coagulant is not only unobvious to early strength effect, can also be obviously shortened thickening time influence construction safety,
Retarder need to be added sometimes for construction safety is met, further decrease cement strength and be difficult to meet the requirements.Therefore, it develops
It is a kind of that cement slurry thickening time is influenced small to be of great significance to the efficient early strength agent that Behavior of Hardened Cement Paste early strength is obviously improved.
Summary of the invention
In view of this, the present invention is intended to provide a kind of oil-well cement solidifying type early strength agent of weak rush, solidifying for solving conventional rush
Agent is not obvious Behavior of Hardened Cement Paste early stage humidification and can also be obviously shortened the technical problems such as thickening time.Oil well of the present invention
The cement solidifying type early strength agent of weak rush can be used for the short oil gas for waiting solidifying demand such as Absorption Wells of Low Pressure, long cementing interval and sea, land
Well well cementation, to realize the excellent fast drilling of oil/gas well.
The present invention relates to a kind of oil-well cements to promote solidifying type early strength agent with weak, and the early strength agent contains following components: with weight
Part meter, 30~70 parts of nano material, 20~50 parts of inorganic salts, 5~20 parts of organic salt, 5~30 parts of drag reducer；Wherein nano material
Mixture selected from fibrous structure nano material Yu laminated structure nano material.
Further, the mass ratio of the fibrous structure nano material and laminated structure nano material is 1:1.
The oil-well cement promotees solidifying type early strength agent with weak according to the present invention, and the fibrous structure nano material is nano-sized carbon
SiClx；The laminated structure nano material is nano-aluminum hydroxide and/or nano-sized magnesium hydroxide.
The oil-well cement promotees solidifying type early strength agent with weak according to the present invention, and the size of the nano material is 20~50nm.
The oil-well cement promotees solidifying type early strength agent with weak according to the present invention, the inorganic salts be selected from potassium sulfate, sodium nitrate or
One or more of calcium sulfate.
The oil-well cement promotees solidifying type early strength agent with weak according to the present invention, and the organic salt is sodium acetate or calcium formate.
The oil-well cement promotees solidifying type early strength agent with weak according to the present invention, and the drag reducer is naphthalenesulfonate formaldehyde condensation compound
With the compound of lignosulfonates, mass ratio 2:1.
Compared with the prior art, oil-well cement of the present invention is had the advantage that with the solidifying type early strength agent of weak rush
1) nanotechnology is introduced into early strength agent design by oil-well cement of the present invention with the solidifying type early strength agent of weak rush, is utilized
The properties such as nano material small-size effect, surface and interfacial effect excite oil-well cement hydration activity, and threadiness are tied
Structure and laminated structure nano material organically combine, and play the role of composite strengthening, to significantly improve the morning of Behavior of Hardened Cement Paste
Phase intensity.
2) oil-well cement of the present invention promotees solidifying type early strength agent by by the reasonable compounding of inorganic salts and organic salt with weak,
The early hydration for promoting cement further speeds up the development of Behavior of Hardened Cement Paste early strength.
3) oil-well cement of the present invention promotees solidifying type early strength agent introducing nano material and latent drag reducer with weak, overcomes often
The apparent defect of early strength agent blood coagulation enhancing effect is advised, makes to increase substantially cement in the case that system is small on cement slurry thickening time influence
Stone intensity.
Specific embodiment
Below in conjunction with specific embodiment and embodiment, it is specifically described the present invention, advantages of the present invention and various effects
It thus will clearly present.It will be understood by those skilled in the art that these specific embodiments and embodiment are for illustrating
The present invention is not intended to limit the present invention.
Throughout the specification, unless otherwise specified, terms used herein are interpreted as usual in this field
Used meaning.Therefore, unless otherwise defined, all technical and scientific terms used herein has leads with belonging to the present invention
The identical meaning of the general understanding of field technique personnel.Contradiction if it exists, this specification are preferential.
Unless otherwise specified, various raw material, reagent, the instrument and equipment etc. used in the present invention, can pass through
Market is commercially available or can be prepared by existing method.
The present invention provides a kind of oil-well cements to promote solidifying type early strength agent with weak, and the early strength agent contains following components: with weight
It measures part to count, 30~70 parts of nano material, 20~50 parts of inorganic salts, 5~20 parts of organic salt, 5~30 parts of drag reducer；Wherein nanometer material
Material is selected from the mixture of fibrous structure nano material and laminated structure nano material.The present invention is by fibrous structure and sheet knot
Structure nano material organically combines, and plays the role of composite strengthening, to significantly improve the early strength of Behavior of Hardened Cement Paste.
Further, the mass ratio of the fibrous structure nano material and laminated structure nano material is 1:1.
The oil-well cement promotees solidifying type early strength agent with weak according to the present invention, and the fibrous structure nano material is nano-sized carbon
SiClx；The laminated structure nano material is nano-aluminum hydroxide and/or nano-sized magnesium hydroxide.
The oil-well cement promotees solidifying type early strength agent with weak according to the present invention, and the size of the nano material is 20~50nm.
The present invention excites oil-well cement hydration activity using properties such as nano material small-size effect, surface and interfacial effects,
The size range of 20~50nm can make nano material that can preferably play its nano effect in cement slurry, play better enhancing
Effect.
The oil-well cement promotees solidifying type early strength agent with weak according to the present invention, the inorganic salts be selected from potassium sulfate, sodium nitrate or
One or more of calcium sulfate.
The oil-well cement promotees solidifying type early strength agent with weak according to the present invention, and the organic salt is sodium acetate or calcium formate.
The oil-well cement promotees solidifying type early strength agent with weak according to the present invention, and the drag reducer is naphthalenesulfonate formaldehyde condensation compound
With the compound of lignosulfonates, mass ratio 2:1.
Embodiment 1
70 parts of nano material are weighed first, and wherein the mixing mass ratio of nanometer silicon carbide and nano-sized magnesium hydroxide is 1:1；Naphthalene
Totally 5 parts of the mixture of sulfonate and formaldehyde condensation product and lignosulfonates, wherein naphthalenesulfonate formaldehyde condensation compound and sulfomethylated lignin
The mass ratio of hydrochlorate is 2:1, and above-mentioned nano material and drag reducer are puddled uniformly.Then the mixing of potassium sulfate and sodium nitrate is added
It totally 20 parts of object, 5 parts of sodium acetate, puddles uniformly, powdered oil-well cement can be obtained with weak and promote solidifying type early strength agent, be labeled as 1# sample
Product.
Embodiment 2
50 parts of nano material are weighed first, wherein the mixing of nanometer silicon carbide, nano-aluminum hydroxide and nano-sized magnesium hydroxide
Mass ratio is 1:0.3:0.7；Totally 10 parts of the mixture of naphthalenesulfonate formaldehyde condensation compound and lignosulfonates, wherein naphthalene sulfonate
The mass ratio of formaldehyde condensation products and lignosulfonates is 2:1, and above-mentioned nano material and drag reducer are puddled and uniformly puddled uniformly.
Then totally 25 parts of mixture of potassium sulfate and calcium sulfate are added, totally 15 parts of mixture of sodium acetate and calcium formate, is puddled uniformly, i.e.,
Powdered oil-well cement can be obtained and promote solidifying type early strength agent with weak, be labeled as 2# sample.
Embodiment 3
30 parts of nano material are weighed first, and wherein the mixing mass ratio of nanometer silicon carbide and nano-aluminum hydroxide is 1:1；Naphthalene
Totally 15 parts of the mixture of sulfonate and formaldehyde condensation product and lignosulfonates, wherein naphthalenesulfonate formaldehyde condensation compound and sulfomethylated lignin
The mass ratio of hydrochlorate is 2:1, and above-mentioned nano material and drag reducer are puddled uniformly.Then the mixing of sodium nitrate and calcium sulfate is added
It totally 35 parts of object, totally 20 parts of mixture of sodium acetate and calcium formate, puddles uniformly, powdered oil-well cement can be obtained and promote to coagulate with weak
Type early strength agent is labeled as 3# sample.
Embodiment 4
30 parts of nano material are weighed first, wherein the mixing matter of nanometer silicon carbide, nano-aluminum hydroxide, nano-sized magnesium hydroxide
Amount is than being 1:0.6:0.4；Totally 30 parts of the mixture of naphthalenesulfonate formaldehyde condensation compound and lignosulfonates, wherein naphthalene sulfonate first
The mass ratio of aldehyde condensate and lignosulfonates is 2:1, and above-mentioned nano material and drag reducer are puddled uniformly.Then nitre is added
It totally 35 parts of the mixture of sour sodium and calcium sulfate, totally 5 parts of the mixture of sodium acetate and calcium formate, puddles uniformly, powder can be obtained
Shape oil-well cement promotees solidifying type early strength agent with weak, is labeled as 4# sample.
Performance evaluation
According to test method specified in GB/T 19139-2012 " oil-well cement test method " in the embodiment of the present invention
Oil-well cement evaluated with the weak performance for promoting solidifying type early strength agent sample.
Oil-well cement of the present invention promotees solidifying type early strength agent evaluation cement slurry basic components (mass ratio) used with weak are as follows:
Formula 1: in terms of the percentage for accounting for cement quality, mixed+6.0% fluid loss agent of material of the mitigation enhancing of G class g cement+50%+
73% water+early strength agent sample (dosage be shown in Table shown in) (cement slurry density 1.50g/cm3)。
Formula 2: in terms of the percentage for accounting for cement quality, mixed+6.0% fluid loss agent of material of the mitigation enhancing of G class g cement+100%+
112% water+early strength agent sample (dosage be shown in Table shown in) (cement slurry density 1.35g/cm3)。
Test 1: under test different temperatures efficiently early strength agent 1#, 2#, 3#, 4# sample to cement slurry thickening time and intensity
It influences, test result is shown in Table 1.Testing cement-slurry method used is formula 1.
Cement slurry thickening time and intensity test result under 1. different temperatures of table
By above-mentioned experimental result it is found that the common oil-well cement coagulant calcium chloride of the prior art is added, cement slurry thickening
Time is obviously shortened, but cement strength raising is limited；And oil-well cement of the present invention is added and promotees solidifying type early strength agent sample with weak
After product 1#, 2#, 3#, 4#, the intensity of Behavior of Hardened Cement Paste is significantly improved, but is influenced on the thickening time slight.When the oil-well cement is with weak
Promote solidifying type early strength agent sample dosage at 3%, the thickening time shortens within 10% at 30 DEG C of cement slurry, thickening time at 90 DEG C
Shortening rate is within 15%, and intensity improving rate is respectively up to 100% and 50% or more.Experiment shows oil well water of the present invention
Mud shows weaker blood coagulation enhancing effect with weak rush solidifying type early strength agent sample 1#, 2#, 3#, has but embodied apparent humidification.
Test 2: it is thick to cement slurry with weak rush solidifying type early strength agent sample 1#, 2#, 3#, 4# to test oil-well cement of the present invention
Change the influence of time and top intensity and 8h early strength, test result is shown in Table 2.Testing cement-slurry method used is formula 2.
2. cement slurry thickening time of table and intensity test result
By above-mentioned experimental result it is found that when early strength agent sample is not added, Behavior of Hardened Cement Paste 8h early strength and for 24 hours top intensity
Both less than 3.5MPa, it is difficult to meet lower step drilling.Be added oil-well cement of the present invention with it is weak promote solidifying type early strength agent sample 1#,
After 2#, 3#, 4#, at 90 DEG C of cement slurry thickening time variation less, but 8h early strength, for 24 hours top intensity and 90 DEG C, for 24 hours
Intensity is all obviously improved, so as to meet the requirement of long cementing interval cementing requirements and fast drilling.
Test 3: test oil-well cement of the present invention with it is weak promote coagulate type early strength agent sample 1#, 2#, 3#, 4# to cement slurry its
The influence of his performance, test result such as table 3.Testing cement-slurry method used is formula 1.
Influence of the early strength agent sample of the present invention of table 3. to other performances of cement slurry
By above-mentioned experimental result it is found that be added oil-well cement of the present invention with it is weak promote solidifying type early strength agent sample 1#, 2#,
After 3#, 4#, cement slurry still has good mobile performance, and it has no adverse effects to cement slurry water loss amount, can effectively reduce water
The density contrast of mud significantly improves cement slurry stability.
Nanotechnology is introduced into design of material by oil-well cement of the present invention with the solidifying type early strength agent of weak rush, by various
The organic complex of material, preparing influences small efficient early strength agent on cement slurry thickening time, thus meeting cementing operation peace
The intensity of Behavior of Hardened Cement Paste is greatly improved on the basis of complete.It is demonstrated experimentally that oil-well cement of the present invention promotees to coagulate type early strength agent with weak, it is right
Cement slurry thickening time influences slightly, but can dramatically increase the early strength of Behavior of Hardened Cement Paste, shows the solidifying high early strong performance of weak rush,
And cement slurry stability can be improved, to cement slurry, other performances have no adverse effects, and have good comprehensive performance.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (7)
1. a kind of oil-well cement promotees solidifying type early strength agent with weak, the early strength agent contains following components: in parts by weight, nano material
30~70 parts, 20~50 parts of inorganic salts, 5~20 parts of organic salt, 5~30 parts of drag reducer；Wherein nano material is selected from threadiness knot
The mixture of structure nano material and laminated structure nano material.
2. oil-well cement as described in claim 1 promotees solidifying type early strength agent with weak, which is characterized in that the fibrous structure nanometer
Material and the mass ratio of laminated structure nano material are 1:1.
3. oil-well cement as claimed in claim 1 or 2 promotees solidifying type early strength agent with weak, which is characterized in that fibrous structure nanometer
Material is nanometer silicon carbide；The laminated structure nano material is nano-aluminum hydroxide and/or nano-sized magnesium hydroxide.
4. the oil-well cement as described in any claim in claims 1 to 3 promotees solidifying type early strength agent with weak, which is characterized in that
The size of the nano material is 20~50nm.
5. oil-well cement as described in claim 1 promotees solidifying type early strength agent with weak, which is characterized in that the inorganic salts are selected from sulfuric acid
One or more of potassium, sodium nitrate or calcium sulfate.
6. oil-well cement as described in claim 1 promotees solidifying type early strength agent with weak, which is characterized in that the organic salt is sodium acetate
Or calcium formate.
7. oil-well cement as described in claim 1 promotees solidifying type early strength agent with weak, which is characterized in that the drag reducer is naphthalene sulfonic acids
The compound of salt formaldehyde condensation products and lignosulfonates, mass ratio 2:1.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113060962A (en) * | 2021-03-18 | 2021-07-02 | 西南石油大学 | Oil well cement corrosion-resistant early strength agent suitable for salt-gypsum layer well cementation and preparation method thereof |
| CN114262177A (en) * | 2021-12-01 | 2022-04-01 | 淮北矿业股份有限公司 | Early-strength mining sealing material |
| CN116143440A (en) * | 2021-11-23 | 2023-05-23 | 天津中油渤星工程科技有限公司 | Nucleus-based composite coagulation accelerating early strength agent for oil well cement and preparation method thereof |
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| CN102321459A (en) * | 2011-06-10 | 2012-01-18 | 天津中油渤星工程科技有限公司 | Oil well cement chlorine-free coagulation accelerating early strength agent |
| US20140000892A1 (en) * | 2012-07-02 | 2014-01-02 | Mega-Tech Holding B.V. | Use of an Additive Compostion for Cementing Bore Wells |
| CN105349125A (en) * | 2015-10-26 | 2016-02-24 | 中国石油天然气集团公司 | Pressure bearing and leakage blocking agent |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102321459A (en) * | 2011-06-10 | 2012-01-18 | 天津中油渤星工程科技有限公司 | Oil well cement chlorine-free coagulation accelerating early strength agent |
| US20140000892A1 (en) * | 2012-07-02 | 2014-01-02 | Mega-Tech Holding B.V. | Use of an Additive Compostion for Cementing Bore Wells |
| CN105349125A (en) * | 2015-10-26 | 2016-02-24 | 中国石油天然气集团公司 | Pressure bearing and leakage blocking agent |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113060962A (en) * | 2021-03-18 | 2021-07-02 | 西南石油大学 | Oil well cement corrosion-resistant early strength agent suitable for salt-gypsum layer well cementation and preparation method thereof |
| CN113060962B (en) * | 2021-03-18 | 2022-03-18 | 西南石油大学 | Oil well cement corrosion-resistant early strength agent suitable for salt-gypsum layer well cementation and preparation method thereof |
| CN116143440A (en) * | 2021-11-23 | 2023-05-23 | 天津中油渤星工程科技有限公司 | Nucleus-based composite coagulation accelerating early strength agent for oil well cement and preparation method thereof |
| CN114262177A (en) * | 2021-12-01 | 2022-04-01 | 淮北矿业股份有限公司 | Early-strength mining sealing material |
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| CN109880604B (en) | 2021-06-15 |
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