CN106701047A - Well-cementing waterproof gel - Google Patents
Well-cementing waterproof gel Download PDFInfo
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- CN106701047A CN106701047A CN201611145657.2A CN201611145657A CN106701047A CN 106701047 A CN106701047 A CN 106701047A CN 201611145657 A CN201611145657 A CN 201611145657A CN 106701047 A CN106701047 A CN 106701047A
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- water proof
- well cementation
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- water
- proof gel
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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
- C09K8/422—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells specially adapted for sealing expandable pipes, e.g. of the non-hardening type
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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
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- General Life Sciences & Earth Sciences (AREA)
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- Inorganic Chemistry (AREA)
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Abstract
The invention provides well-cementing waterproof gel which comprises, by weight parts, 0.5-1 part of crosslinking glue, 0.001-0.1 part of crosslinking agent, and the balance water. The crosslinking glue comprises xanthan gum. The crosslinking glue comprising the xanthan gum is taken as a raw material; and through an effect of the crosslinking agent, the obtained well-cementing waterproof gel is good in waterproof performance and has very good compatibility with cement paste. Experimental results indicate that the water filter loss of the well-cementing waterproof gel under the pressure of 3.5 MPa for 5 min is 0, and the well-cementing waterproof gel has no influence on densification time and strength of the cement paste after being mixed with the cement paste according to different proportions.
Description
Technical field
The present invention relates to oil gas field of engineering technology, more particularly to a kind of well cementation water proof gel.
Background technology
Well cementation is exactly the process in the annular space for injecting between the borehole wall and sleeve pipe cement mortar, its purpose is to Inter-zonal packing
With support and protection sleeve pipe.The quality of cementing quality is directly connected to the protection in the life-span and resource of Oil/gas Well, it is therefore necessary to fill
Divide the links for considering well cementing operation.In drilling process due to stratum cannot foresight, may be met in drilling process
To water table, underground river or solution cavity, the current sprung up in stratum easily break up cementing slurry, cause well cementing operation to fail.
In cementing operation, if cement mortar and current or drilling fluid directly contact, cement mortar will be by the pollution of current or drilling fluid
Gummy mass shape agglutinating matter is produced, displacement is not only difficult to, displacement efficiency is influenceed, causes cement mortar to alter groove, influence sealing quality,
Can also cause to sprain stifled and press the well cementation accidents such as leakage stratum or sausage-filling when serious, so as to cause cementing quality serious harm.
To ensure the well cementing operation sealing effect of the serious superficial layer well of water outlet, it is necessary to be used to be prevented in well cementing operation using water proof gel
Water erosion.
A kind of gel of macropore plugging is disclosed in Chinese invention patent CN100489053C, for the selection of water injection well
Property closure and the displacement of reservoir oil, it is small with treatment radius, the hyposmosis position that can effectively develop at the top of thick oil pay and less permeable layer position
Effect.Chinese invention patent CN 101353569B disclose a kind of controllable cross-linked gel water blockoff leak stopping material for oil gas field
Material, it can block Fractured, hole severe mud losses stratum, increase the strength and stability of gel.Chinese invention patent CN
103666418B discloses a kind of Gel profile control agent, is mainly used in waterflooding oil field closure water breakthrough passage, reduces oil well and produces water
Amount, increases well oil output.But above-mentioned gel does not simultaneously have obstruct current and the performance with cement mortar compatibility, is simply possible to use in out
Water plugging and profile controlling and decreasing water cut and increasing oil during adopting, it is impossible to for playing impermeable role in well cementing process.
The content of the invention
It is an object of the invention to provide one kind well cementation water proof gel.The well cementation water proof gel that the present invention is provided is not dissolved in
Water, and do not disperse in current, there is good compatibility with cement mortar.
The invention provides one kind well cementation water proof gel, by raw material gross weight be 100 weight portions based on, by including following components
Raw material prepare：The water of 0.5~1 part of cross-linked rubber, 0.001~0.1 part of crosslinking agent, and surplus；The cross-linked rubber includes
Xanthans.
Preferably, the raw material includes the water of 0.6~0.8 part of cross-linked rubber, 0.05~0.08 part of crosslinking agent, and surplus.
Preferably, the cross-linked rubber also includes guar gum.
Preferably, the guar gum and the mass ratio of xanthans are 60~80:15~25.
Preferably, the guar gum and the mass ratio of xanthans are 70~75:15~25.
Preferably, the cross-linked rubber also includes polymer latex.
Preferably, the crosslinking agent includes the one kind or many in borax, organic zirconium crosslinker, silane crosslinker and aluminium chloride
Kind.
Preferably, the crosslinking agent includes borax and organic zirconium crosslinker.
Preferably, the raw material also includes 0.001~0.01 part of bactericide.
Preferably, the bactericide includes aldehydes bactericide.
The invention provides one kind well cementation water proof gel, by raw material gross weight be 100 weight portions based on, by including following components
Raw material prepare：The water of 0.5~1 part of cross-linked rubber, 0.001~0.1 part of crosslinking agent, and surplus；The cross-linked rubber includes
Xanthans.The present invention with the cross-linked rubber including xanthans be raw material, by the effect of crosslinking agent, the well cementation water proof gel for obtaining every
It is aqueous good, and have good compatibility with cement mortar.Test result indicate that, the well cementation water proof gel that the present invention is provided is in 3.5MPa
The filter loss of 5min water is 0 under pressure, to the thickening time of cement mortar and intensity without shadow after mixing by different proportion with cement mortar
Ring.
Additionally, each hydrogel of well cementation that the present invention is provided also has, and intensity is high, temperature tolerance is good, and rheological characteristic is good, it is easy to pump,
The characteristics of good stability.
Specific embodiment
The invention provides one kind well cementation water proof gel, by raw material gross weight be 100 weight portions based on, by including following components
Raw material prepare：The water of 0.5~1 part of cross-linked rubber, 0.001~0.1 part of crosslinking agent, and surplus；The cross-linked rubber includes
Xanthans.
By raw material gross weight for the raw material of the well cementation water proof gel that based on 100 weight portions, the present invention is provided includes cross-linked rubber 0.5
~1 part, preferably 0.6~0.8 part；The cross-linked rubber includes xanthans.In the present invention, the cross-linked rubber preferably also includes melon
That glue.In the present invention, the guar gum is preferably 60~80 with the mass ratio of xanthans:15~25, more preferably 70~75:
15~25.
In the present invention, the cross-linked rubber preferably also includes polymer latex.In the present invention, the polymer latex is preferably
One or more in polyacrylamide, polyvinyl alcohol and polyacrylonitrile.In the present invention, the polymer latex and xanthans
Mass ratio is preferably 5~10:60~80, more preferably 5~10:65~75.In the present invention, the cross-linked rubber is in crosslinking agent
The lower cross-linking reaction of effect, forms cross-linked polymer.
By raw material gross weight for the raw material of the well cementation water proof gel that based on 100 weight portions, the present invention is provided includes crosslinking agent
0.001~0.1 part, preferably 0.05~0.08 part.In the present invention, the crosslinking agent preferably includes borax, organic zirconium crosslinking
One or more in agent, silane crosslinker and aluminium chloride, combination or boron more preferably including borax and organic zirconium crosslinker
The combination of sand and aluminium chloride.In an embodiment of the present invention, the crosslinking agent may further be embodied as borax, organic zirconium crosslinker and silicon
The combination of alkane crosslinking agent.The present invention does not have special restriction to the ratio of each component in the crosslinking agent, using arbitrary proportion
Combination.In the present invention, when the crosslinking agent includes borax and organic zirconium crosslinker, the borax and organic zirconium are crosslinked
The mass ratio of agent is preferably 7~9:1~3；When the crosslinking agent includes borax and aluminium chloride, the matter of the borax and aluminium chloride
Amount ratio preferably 7~9:1~3；When the crosslinking agent includes borax, organic zirconium crosslinker and silane crosslinker, the borax,
The mass ratio of organic zirconium crosslinker and silane crosslinker is preferably 80~90:5~10:5.In the present invention, the crosslinking agent can
To promote cross-linked rubber to carry out cross-linking reaction, cross-linked polymer is obtained.
The present invention does not have special restriction to the species of the organic zirconium crosslinker and silane crosslinker, using this area skill
Organic zirconium crosslinker and silane crosslinker known to art personnel.In the present invention, the organic zirconium crosslinker is preferably included
One or more in zirconium iso-propoxide, acetylacetone,2,4-pentanedione zirconium and acetic acid zirconium.In the present invention, the silane crosslinker preferably includes first
Base triacetoxysilane and/or MTMS.
By raw material gross weight for based on 100 weight portions, the raw material of the well cementation water proof gel that the present invention is provided preferably also includes killing
0.001~0.01 part of microbial inoculum, preferably 0.005~0.008 part.In the present invention, the bactericide preferably includes aldehydes sterilization
Agent；The aldehydes bactericide is preferably included one or more in glutaraldehyde, formaldehyde and methacrylaldehyde.In the present invention, it is described solid
When well water proof gel deposited number of days more than 5 days, the bactericide can avoid the bacteria breed from causing well cementation water proof gel to be denatured.
By raw material gross weight for the raw material of the well cementation water proof gel that based on 100 weight portions, the present invention is provided includes the water of surplus.
In the present invention, the water can be the full and uniform mixing for promoting other each components as solvent.
The present invention does not have special restriction to the preparation method of each hydrogel of well cementation, ripe using those skilled in the art
The method of the mixed material known.In the present invention, the preparation method of the well cementation water proof gel, preferably includes following step
Suddenly：
(1) cross-linked rubber is mixed with the first weight portion water, obtains being crosslinked sol solution；
(2) the crosslinking sol solution in the step (1) is mixed with the water of crosslinking agent and residuals weight part, cross-linking reaction is obtained
To well cementation water proof gel.
In the present invention, water preferably divides different batches to add as solvent.The present invention does not have to the addition batch of the water
Special restriction, the addition according to raw material is adjusted.In the present invention, the first weight portion water is preferably total Water
50~99.9%.
The present invention preferably mixes cross-linked rubber with the first weight portion water, obtains being crosslinked sol solution.The present invention is to the crosslinking
The mass ratio of glue and the first weight portion water does not have special restriction, can dissolve cross-linked rubber with water and be no more than total Water
It is accurate.In the present invention, the cross-linked rubber is preferably carried out under agitation with the mixing of the first weight portion water；The speed of the stirring
Rate is preferably 3000~6000rpm, more preferably 4000~5000rpm；The time of the stirring is preferably 2~3h.
After obtaining crosslinking sol solution, the present invention preferably mixes the crosslinking sol solution and the water of crosslinking agent and residuals weight part
Close, cross-linking reaction obtains water proof gel of cementing the well.The present invention enters to the crosslinking sol solution and the water of crosslinking agent and residuals weight part
What row mixed operates without special restriction, using the technical scheme of mixed material well known to those skilled in the art.
In the present invention, the mixing is preferably included：The crosslinking agent is mixed with the water of residuals weight part, cross-linking agent solution is obtained；Will
The cross-linking agent solution mixes with crosslinking sol solution, and cross-linking reaction obtains water proof gel of cementing the well.
The present invention preferably mixes crosslinking agent with the water of residuals weight part, obtains cross-linking agent solution.In the present invention, it is described
The mass concentration of crosslinking agent is preferably 1~10%, more preferably 3~6% in cross-linking agent solution.
Preferably, when the raw material of the well cementation water proof gel includes bactericide, the present invention is by bactericide and part water
Mixing, obtains bactericidal liquid；Again mixing cross-linking agent solution, crosslinking sol solution and bactericidal liquid carries out cross-linking reaction.In the present invention,
The mass concentration of the bactericidal liquid is preferably 5~10%, more preferably 7~8%.
In the present invention, the temperature of the cross-linking reaction is preferably room temperature；The pressure of the cross-linking reaction is preferably normal pressure；
The time of the cross-linking reaction is preferably 1~2h.
The present invention does not have special restriction to the application method of the well cementation water proof gel, ripe using those skilled in the art
The application method of the well cementation water proof gel known.In the present invention, it is preferred to by the well cementation water proof gel injection before well cementation
Pit shaft and casing annulus.In the present invention, the injection is preferably：To be cemented the well with cementing truck, water proof gel is counter to clamp-on pit shaft and set
Pipe ring is empty.In the present invention, the consumption of the well cementation water proof gel is preferably 3~6m3, more preferably 4~5m3。
In order to further illustrate the present invention, the well cementation water proof gel that the present invention is provided is carried out in detail with reference to embodiment
Ground description, but they can not be interpreted as limiting the scope of the present invention.
Embodiment 1:
Raw material：The weight portion of cross-linked rubber 1；The weight portion of crosslinked fluid 1；The weight portion of water 98.
Cross-linked rubber is prepared by the component of following mass content：Xanthans 80%, guar gum 20%.
Crosslinked fluid is prepared by the component of following mass content：Borax 3%, water 97%.
1) crosslinked fluid is prepared standby；
2) a certain amount of water is imported in reactor, opens stirring；
3) cross-linked rubber is slowly added in the state of stirring, 2~3h is stirred, cross-linked rubber is fully dissolved；
4) add crosslinked fluid and be well mixed, that is, obtain water proof gel of cementing the well.
Performance test is carried out to well cementation water proof gel manufactured in the present embodiment by the following method, result is obtained respectively such as table
Shown in 1~5.
The evaluation method of gel strength：The well cementation water proof gel prepared using MD-NJ5 gel strength measuring instruments measure
Gel strength.
Heatproof and water isolating evaluation method：HTHP filter paper on dehydration wound packages, the well cementation water proof that will be prepared are coagulated
Glue 100ml is fitted into HTHP dehydration cylinder, and 75ml clear water is poured on water proof gel top, tests different pressures, different temperatures
The filter loss of lower 5min water.The high-temperature and high-pressure filter press for using is the filtration device of the sensible GGS42-2A types in Qingdao sea.
Pump-conveying property evaluation method：The rheological property of the well cementation water proof gel for preparing is determined at normal temperatures, uses instrument
It is the Qingdao sea fast rotation viscometers of sensible ZNN-D6A six.
The evaluation method of stability：The well cementation water proof gel 50ml that will be prepared is poured in 250ml water, stands 1min
In, state of the observation water proof gel in water.Then it is stirred into 5min under the conditions of 300r/min on six fast rotation viscometers,
Then stand in 1min, observe state of the water proof gel in water.
With the evaluation method of the compatibility of cement mortar：The well cementation water proof gel that will be prepared and cement mortar in mass ratio 0:
100、5:95、10:90、15:85、20:80、25:75、30:70 are mixed, and are thickened under the conditions of then determine cement mortar 80 DEG C
Time and intensity.
Embodiment 2:
Raw material：The weight portion of cross-linked rubber 1；The weight portion of crosslinked fluid 1；The weight portion of water 97.9.
Cross-linked rubber is prepared by following components：Xanthans.
Crosslinked fluid is prepared by the component of following mass content：Borax 5%, water 95%.
Method according to embodiment 1 prepares well cementation water proof gel.
Performance test is carried out to well cementation water proof gel manufactured in the present embodiment according to the methods described of embodiment 1, result is obtained
Respectively as shown in table 1~5.
Embodiment 3:
Raw material：The weight portion of cross-linked rubber 0.5；The weight portion of crosslinked fluid 0.5；The weight portion of bactericide 0.1；The weight portion of water 98.9.
Cross-linked rubber is prepared by the component of following mass content：Xanthans 75%, guar gum 15%, polyvinyl alcohol 10%.
Crosslinked fluid is prepared by the component of following mass content：Crosslinking agent 5%, water 95%.
Crosslinking agent is prepared by the component of following mass content：Borax 85%, organic zirconium 10%, silane crosslinker 5%.
Bactericide is prepared by following components：Glutaraldehyde 7%, water 93%.
According to the method for embodiment 1, bactericide is added simultaneously with crosslinking agent, prepares well cementation water proof gel.
Performance test is carried out to well cementation water proof gel manufactured in the present embodiment according to the methods described of embodiment 1, result is obtained
Respectively as shown in table 1~5.
Embodiment 4:
Raw material：The weight portion of cross-linked rubber 0.8；The weight portion of crosslinked fluid 0.5；The weight portion of bactericide 0.1；The weight portion of water 98.6.
Cross-linked rubber is prepared by the component of following mass content：Xanthans 75%, guar gum 20%, polyacrylamide 5%.
Crosslinked fluid is prepared by the component of following mass content：Crosslinking agent 5%, water 95%.
Crosslinking agent is obtained by the component of following mass content：Borax 90%, organic zirconium 10%.
Bactericide is prepared by the component of following mass content：Methacrylaldehyde 7%, water 93%.
According to the method for embodiment 1, bactericide is added simultaneously with crosslinking agent, prepares well cementation water proof gel.
Performance test is carried out to well cementation water proof gel manufactured in the present embodiment according to the methods described of embodiment 1, result is obtained
Respectively as shown in table 1~5.
Embodiment 5:
The weight portion of cross-linked rubber 0.8；The weight portion of crosslinked fluid 0.5；The weight portion of bactericide 0.1；The weight portion of water 98.6.
Cross-linked rubber is prepared by the component of following mass content：Xanthans 60%, guar gum 25%, polyacrylamide 5% gathers
Vinyl alcohol 5%, polyacrylonitrile 5%.
Crosslinked fluid is prepared by the component of following mass content：Crosslinking agent 5%, water 95%.
Crosslinking agent is obtained by the component of following mass content：Borax 90%, aluminium chloride 10%.
Bactericide is prepared by the component of following mass content：Formaldehyde 10%, water 90%.
According to the method for embodiment 1, bactericide is added simultaneously with crosslinking agent, prepares well cementation water proof gel.
Performance test is carried out to well cementation water proof gel manufactured in the present embodiment according to the methods described of embodiment 1,
Result is obtained respectively as shown in table 1~5.
Well cementation water proof gel strength in the embodiment 1~5 of table 1
| Project | Gel strength N |
| Embodiment 1 | 25 |
| Embodiment 2 | 30 |
| Embodiment 3 | 32 |
| Embodiment 4 | 35 |
| Embodiment 5 | 35 |
Well cementation water proof gel temperature resistance water isolating in the embodiment 1~5 of table 2
Well cementation water proof gel pump-conveying property and rheological property in the embodiment 1~5 of table 3
Well cementation water proof gel stability performance in the embodiment 1~5 of table 4
Well cementation water proof gel and cement mortar compatibility in the embodiment 1~5 of table 5
As can be seen from the above embodiments, the well cementation water proof gel strength that the present invention is provided is adjustable；With good water proof
Effect, good stability does not disperse in water, immiscible with water；With good heat-resisting property, the temperature resistance that can meet 120 DEG C will
Ask；Rheological property meets the requirement of pump-conveying property；There is good compatibility with cement mortar, do not interfere with the property of cementing slurry
Energy；Formula is simple, and site operation is convenient；It is environment-friendly.
The above is only the preferred embodiment of the present invention, and any formal limitation is not made to the present invention.Should
Point out, for those skilled in the art, under the premise without departing from the principles of the invention, if can also make
Dry improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of well cementation water proof gel, be 100 weight portions by raw material gross weight based on, be prepared into by the raw material including following components
Arrive：The water of 0.5~1 part of cross-linked rubber, 0.001~0.1 part of crosslinking agent, and surplus；The cross-linked rubber includes xanthans.
2. it is according to claim 1 well cementation water proof gel, it is characterised in that the raw material include cross-linked rubber 0.6~0.8
The water of part, 0.05~0.08 part of crosslinking agent, and surplus.
3. it is according to claim 1 and 2 well cementation water proof gel, it is characterised in that the cross-linked rubber also include guar gum.
4. well cementation water proof gel according to claim 3, it is characterised in that the guar gum is with the mass ratio of xanthans
60~80:15~25.
5. well cementation water proof gel according to claim 4, it is characterised in that the guar gum is with the mass ratio of xanthans
70~75:15~25.
6. it is according to claim 3 well cementation water proof gel, it is characterised in that the cross-linked rubber also include polymer latex.
7. it is according to claim 1 and 2 well cementation water proof gel, it is characterised in that the crosslinking agent include borax, organic zirconium
One or more in crosslinking agent, silane crosslinker and aluminium chloride.
8. well cementation water proof gel according to claim 7, it is characterised in that the crosslinking agent includes that borax and organic zirconium are handed over
Connection agent.
9. it is according to claim 1 and 2 well cementation water proof gel, it is characterised in that the raw material also include bactericide 0.001
~0.01 part.
10. it is according to claim 9 well cementation water proof gel, it is characterised in that the bactericide include aldehydes bactericide.
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| CN201611145657.2A CN106701047A (en) | 2016-12-13 | 2016-12-13 | Well-cementing waterproof gel |
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Cited By (6)
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| CN108384522A (en) * | 2018-02-10 | 2018-08-10 | 长江大学 | A kind of deepwater drilling liquid displacement liquid |
| CN110577350A (en) * | 2019-10-17 | 2019-12-17 | 四川公路桥梁建设集团有限公司 | Harmless treatment method for engineering waste slurry |
| CN110791268A (en) * | 2019-09-21 | 2020-02-14 | 海洋石油工程股份有限公司 | Delayed crosslinking gel with interpenetrating network structure and preparation method thereof |
| CN110926292A (en) * | 2019-12-16 | 2020-03-27 | 安徽理工大学 | Water-leakage-proof sand hole sealing bag for coal mine blasting and using method thereof |
| CN111484653A (en) * | 2020-05-11 | 2020-08-04 | 中国石油大学(北京) | Xanthan gum composite gel for underbalanced drilling and preparation method and application thereof |
| CN115432995A (en) * | 2022-06-28 | 2022-12-06 | 广州市北二环交通科技有限公司 | Perforated brick prepared by utilizing engineering waste slurry |
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| CN108384522A (en) * | 2018-02-10 | 2018-08-10 | 长江大学 | A kind of deepwater drilling liquid displacement liquid |
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| CN115432995A (en) * | 2022-06-28 | 2022-12-06 | 广州市北二环交通科技有限公司 | Perforated brick prepared by utilizing engineering waste slurry |
| CN115432995B (en) * | 2022-06-28 | 2023-09-12 | 广州市北二环交通科技有限公司 | Porous brick prepared from engineering waste slurry |
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Application publication date: 20170524 |