CN106543994A - A kind of film-forming type oil-well cement filtrate reducer and preparation method thereof - Google Patents
A kind of film-forming type oil-well cement filtrate reducer and preparation method thereof Download PDFInfo
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- CN106543994A CN106543994A CN201610867028.4A CN201610867028A CN106543994A CN 106543994 A CN106543994 A CN 106543994A CN 201610867028 A CN201610867028 A CN 201610867028A CN 106543994 A CN106543994 A CN 106543994A
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- Prior art keywords
- film
- type oil
- well cement
- filtrate reducer
- dispersant
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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
Abstract
The invention discloses a kind of film-forming type oil-well cement filtrate reducer, it consists of the following components in percentage by weight：40 45% polyvinyl alcohol；2 5% polyvinylpyrrolidone；8 10% dispersant；Balance of inserts.The present invention adds the cement water reducer containing polyvinyl alcohol in cement and can form network structure, network structure is flocked together by polyvinyl alcohol and is formed, and there is between cement-hydrate obvious interleaving effect, so as to give Behavior of Hardened Cement Paste certain toughness, there is no embrittlement in Behavior of Hardened Cement Paste, improve the sealing integrity and recovery ratio of pit shaft.
Description
Technical field
The invention belongs to the technical field of the oil well cement additive in drilling engineering, and in particular to a kind of film-forming type oil well
Cement water reducer and preparation method thereof.
Background technology
With going deep into for the exploitation to poorly efficient oil-gas reservoir, in order to ensure the cementing quality of oil-gas Layer, fluid loss agent is in well cementation
It is more and more used in cement mortar；With the exploitation of scale in recent years, the consumption of fluid loss agent increases in span, annual area
The oil-well cement filtrate reducer demand in domain is more than 1000T；Adopt after the first note for many years of many oil fields low pressure reservoirs, cause stratum to contain
Water is high, pressure unstability, and zonal oil, gas and water is altered occurs often, the performance indications of the granule blocking type fluid loss agent of employing
It is low, its cement slurry water loss amount ＞ 150ml, cementing quality stability is poor, and fleeing proof effect is not good, far from meet stratum well cementation
Need.
The content of the invention
In order to solve the above-mentioned problems in the prior art, it is an object of the invention to propose a kind of film-forming type oil well water
Mud fluid loss agent；A kind of another object of the present invention, there is provided method for preparing above-mentioned film-forming type oil-well cement filtrate reducer.
To realize above-mentioned technical purpose, the present invention is adopted the following technical scheme that and is achieved.
The film-forming type oil-well cement filtrate reducer of the present invention, consists of the following components in percentage by weight：40-45%'s is poly-
Vinyl alcohol；The polyvinylpyrrolidone of 2-5%；The dispersant of 8-10%；Balance of inserts.
Preferably, in above-mentioned film-forming type oil-well cement filtrate reducer, consist of the following components in percentage by weight：42-
44% polyvinyl alcohol；The polyvinylpyrrolidone of 3-4%；The dispersant of 8.2-9.5%；Balance of inserts.
Preferably, in film-forming type oil-well cement filtrate reducer, consist of the following components in percentage by weight：40% it is poly-
Vinyl alcohol；2% polyvinylpyrrolidone；10% dispersant；Balance of inserts.
Preferably, in film-forming type oil-well cement filtrate reducer, the degree of polymerization of the polyvinyl alcohol is 50 ~ 60.
Preferably, in film-forming type oil-well cement filtrate reducer, the inserts are Gypsum Fibrosum.
Preferably, in film-forming type oil-well cement filtrate reducer, the dispersant is oil well cement dispersant.
Another object of the present invention, the method for preparing the film-forming type oil-well cement filtrate reducer of the present invention, step are as follows, press
Polyvinyl alcohol and polyvinylpyrrolidone are first put into stirring in taper agitator tank by formula ratio makes which be evenly distributed, and stirs 15-25
Film forming is reacted after minute fully；Dispersant, inserts are sequentially added, 25-35 minutes are stirred, membranous type oil-well cement drop is made and is lost
Water preparation finished product.
Preferably, the method for preparing the film-forming type oil-well cement filtrate reducer of the present invention, it is step by step rapid as follows, by formula ratio ratio
Polyvinyl alcohol and polyvinylpyrrolidone are put into stirring in taper agitator tank first makes which be evenly distributed, after stirring 20 minutes fully
Reaction film forming；Dispersant, inserts are sequentially added, is stirred 30 minutes, is made membranous type oil-well cement filtrate reducer finished product.
Beneficial effects of the present invention：
The present invention adds polyvinyl alcohol and polyvinylpyrrolidone in cement slurry water loss agent, constitutes latex cement system, this breast
Colloid is tied up to when having certain pressure reduction between mud and stratum, forms the macromolecule membrane of densification in interface, on the one hand prevents mud
Free water in slurry is percolated to stratum, it is ensured that the low dehydration of cement mortar；On the other hand the Free water of cement mortar is prevented to stratum
Diafiltration, it is ensured that the low dehydration of cement mortar, on the other hand prevents high pressure formation liquid from migrating into cement slurry, with anti-channeling
Can, compared with granule blocking type fluid loss agent, performance indications are more excellent, can more meet live well cementation demand, can lift well cementation matter
Amount, the generation that effective control formation oil, gas and water are altered.
Specific embodiment
The invention will be further described below：
Embodiment 1
A kind of film-forming type oil-well cement filtrate reducer provided in an embodiment of the present invention, consists of the following components in percentage by weight：
The polyvinyl alcohol of 40-45%；The polyvinylpyrrolidone of 2-5%；The dispersant of 8-10%；Balance of inserts, inserts may be selected
Gypsum Fibrosum.
Wherein, the degree of polymerization of polyvinyl alcohol is 50 ~ 60, can select existing product on market, such as Anhui Province dimension group
The model model 1788 of Co., Ltd's production（60 mesh）Polyvinyl alcohol；Polyvinylpyrrolidone is also can select on market
The polyvinylpyrrolidone of model K30 of existing product, such as Guangdong Yue Mei Chemical Co., Ltd.s production；The dispersant
Claim fire retardant, specifically, be well cement tolerance blocking.The dispersant can select existing product, such as He Nanwei on market
The well cement tolerance blocking of model USZ of brightness Chemical Co., Ltd. production, or marial rocks industrial concrete admixture in Beijing adds
The well cement tolerance blocking of model HY-008 of work company limited production, the invention is not limited in cited production certainly
Producer, as long as playing the dispersant of peptizaiton.
Polyvinyl alcohol (English full name polyvinyl alcohol, vinylalcohol polymer, abbreviation PVA) is one
Kind of water-soluble polymer, with the presence of substantial amounts of hydroxyl in molecule, therefore, it has many excellent characteristics, to Slow setting time with
Comprcssive strength affects little, and has certain film forming anti-gas channeling effect.Polyvinylpyrrolidone (English full name polyvinyl
Pyrrolidone, abbreviation PVP), it can be adsorbed onto particle surface, and can preferably control dehydration with dispersant compounding use,
Play sterically hindered effect.Contain substantial amounts of anion in the dispersant, which part-SO-3 groups are drawn by electrostatic
Power is adsorbed in cement particle surface, and another part gets rid of the abundant aquation in solution in the presence of electrostatic repulsion, is formed thicker
Hydration shell so that cement particle surface carries identical negative charge, the current potential of cement particle surface by just becoming negative, electrostatic repulsion
Dispersion to granule is favourable.
Embodiment 2
A kind of film-forming type oil-well cement filtrate reducer provided in an embodiment of the present invention, consists of the following components in percentage by weight：
The polyvinyl alcohol of 42-44%；The polyvinylpyrrolidone of 3-4%；The dispersant of 8.2-9.5%；Balance of inserts.
Embodiment 3
A kind of film-forming type oil-well cement filtrate reducer provided in an embodiment of the present invention, consists of the following components in percentage by weight：
42% polyvinyl alcohol；3% polyvinylpyrrolidone；8% dispersant；Balance of inserts.
Embodiment 4
A kind of film-forming type oil-well cement filtrate reducer provided in an embodiment of the present invention, consists of the following components in percentage by weight：
40% polyvinyl alcohol；2% polyvinylpyrrolidone；10% dispersant；Balance of inserts.
Embodiment 5
A kind of film-forming type oil-well cement filtrate reducer provided in an embodiment of the present invention, consists of the following components in percentage by weight：
45% polyvinyl alcohol；5% polyvinylpyrrolidone；9% dispersant；Balance of inserts.
Embodiment 6
A kind of method of the film-forming type oil-well cement filtrate reducer prepared described in embodiment 1 is present embodiments provided, step is as follows,
Polyvinyl alcohol and polyvinylpyrrolidone are put into stirring in taper agitator tank first by formula ratio makes which be evenly distributed, and stirs 15-
Film forming is reacted after 25 minutes fully；Dispersant, inserts are sequentially added, 25-35 minutes are stirred, membranous type oil-well cement drop is made
Dehydration agent finished product.
Embodiment 7
A kind of method for preparing film-forming type oil-well cement filtrate reducer in embodiment 5 is present embodiments provided, step is as follows, by matching somebody with somebody
Side's amount makes which be evenly distributed than polyvinyl alcohol and polyvinylpyrrolidone are put into stirring in taper agitator tank first, stirs 20 minutes
Film forming is reacted afterwards fully；Dispersant, inserts are sequentially added, is stirred 30 minutes, is made film-forming type oil-well cement filtrate reducer
Finished product.Code name is sample 1.
The sample 1 of certain mass percent (on the basis of cement quality) is added in Jiulian Shan Mountain G class g cements, is pressed
GB10238-2005 standards prepare cement mortar, then by People's Republic of China's oil and gas industry standard SY/T5504.2-
The fluid loss of 2005 " oil-well cement filtrate reducer evaluation methodology " determination sample 1, evaluates the filtrate-loss control energy of sample 1.As a result such as
Shown in table 1 below.
Comparative example is provided simultaneously, outsourcing sample 2, sample 2 select granule blocking type fluid loss agent, the granule blocking type drop is lost
Water preparation is produced by Hebei Renqiu City Peng Yu Chemical Co., Ltd.s.The sample with 1 phase homogenous quantities of sample is added in victory Weihe River G class g cements
2, and prepare the cement mortar that the ratio of mud is 0.44 by GB10238-2005 standards and prepare cement mortar by GB10238-2005 standards.So
People's Republic of China's oil and gas industry standard SY/T5504.2-2005 " oil-well cement filtrate reducer evaluation methodology " is pressed afterwards
The fluid loss of determination sample 2, evaluates the filtrate-loss control energy of sample 2.As a result it is as shown in table 1 below.
The shadow of cement slurry water loss agent and existing granule blocking type fluid loss agent to cement slurry property parameter in 1 present invention of table
Ring
Test result indicate that, compared with granule blocking type fluid loss agent, fluid loss is less for the cement slurry water loss agent that the present invention is provided,
Performance indications are more excellent, can more meet live well cementation demand, can lift cementing quality, and what effective control formation oil, gas and water were altered sends out
It is raw.
Obviously, those skilled in the art can carry out the essence of various changes and modification without deviating from the present invention to the present invention
God and scope.So, if these modifications of the present invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising these changes and modification.
Claims (8)
1. a kind of film-forming type oil-well cement filtrate reducer, it is characterised in that consist of the following components in percentage by weight：40-45%
Polyvinyl alcohol；The polyvinylpyrrolidone of 2-5%；The dispersant of 8-10%；Balance of inserts.
2. film-forming type oil-well cement filtrate reducer according to claim 1, it is characterised in that by following percentage by weight
Component is constituted：The polyvinyl alcohol of 42-44%；The polyvinylpyrrolidone of 3-4%；The dispersant of 8.2-9.5%；Balance of inserts.
3. film-forming type oil-well cement filtrate reducer according to claim 1, it is characterised in that by following percentage by weight
Component is constituted：40% polyvinyl alcohol；2% polyvinylpyrrolidone；10% dispersant；Balance of inserts.
4. film-forming type oil-well cement filtrate reducer according to claim 1, it is characterised in that the polymerization of the polyvinyl alcohol
Spend for 50 ~ 60.
5. film-forming type oil-well cement filtrate reducer according to claim 1, it is characterised in that the inserts are Gypsum Fibrosum.
6. film-forming type oil-well cement filtrate reducer according to claim 1, it is characterised in that the dispersant is oil well water
Cement dispersant.
7. a kind of method of the film-forming type oil-well cement filtrate reducer prepared described in claim 1, it is characterised in that：Step is such as
Under, polyvinyl alcohol and polyvinylpyrrolidone are put into stirring in taper agitator tank first by formula ratio makes which be evenly distributed, and stirs
Film forming is reacted after 15-25 minutes fully；Dispersant, inserts are sequentially added, 25-35 minutes is stirred, is made membranous type oil well water
Mud fluid loss agent finished product.
8. the method for preparing film-forming type oil-well cement filtrate reducer according to claim 6, it is characterised in that：Step is such as
Under, make which to be evenly distributed than polyvinyl alcohol and polyvinylpyrrolidone are put into stirring in taper agitator tank first by formula ratio, stir
Film forming is reacted after mixing 20 minutes fully；Dispersant, inserts are sequentially added, is stirred 30 minutes, make membranous type oil-well cement drop
Dehydration agent finished product.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610867028.4A CN106543994A (en) | 2016-09-30 | 2016-09-30 | A kind of film-forming type oil-well cement filtrate reducer and preparation method thereof |
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| CN201610867028.4A CN106543994A (en) | 2016-09-30 | 2016-09-30 | A kind of film-forming type oil-well cement filtrate reducer and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1775896A (en) * | 2005-11-22 | 2006-05-24 | 刘伟 | Dispersion dehydration-reducing agent for oil field well cementation and its preparing method |
| CN101318799A (en) * | 2008-07-01 | 2008-12-10 | 中国海洋石油总公司 | High-strength low-freedom water low-density oil well cement paste |
| CN102531481A (en) * | 2011-12-30 | 2012-07-04 | 中国石油集团川庆钻探工程有限公司 | High-strength and low-density cement paste using fluid loss agent |
| CN105038741A (en) * | 2015-05-18 | 2015-11-11 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Cementing fluid system and preparation method of same |
| CN105884954A (en) * | 2016-06-15 | 2016-08-24 | 中国海洋石油总公司 | Temperature-resistant and salt-resistant latex blocking agent and preparation method thereof |
-
2016
- 2016-09-30 CN CN201610867028.4A patent/CN106543994A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1775896A (en) * | 2005-11-22 | 2006-05-24 | 刘伟 | Dispersion dehydration-reducing agent for oil field well cementation and its preparing method |
| CN101318799A (en) * | 2008-07-01 | 2008-12-10 | 中国海洋石油总公司 | High-strength low-freedom water low-density oil well cement paste |
| CN102531481A (en) * | 2011-12-30 | 2012-07-04 | 中国石油集团川庆钻探工程有限公司 | High-strength and low-density cement paste using fluid loss agent |
| CN105038741A (en) * | 2015-05-18 | 2015-11-11 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Cementing fluid system and preparation method of same |
| CN105884954A (en) * | 2016-06-15 | 2016-08-24 | 中国海洋石油总公司 | Temperature-resistant and salt-resistant latex blocking agent and preparation method thereof |
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Application publication date: 20170329 |