CN105925253B - The molten solidification sealing agent of low-density theobromine - Google Patents
The molten solidification sealing agent of low-density theobromine Download PDFInfo
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- CN105925253B CN105925253B CN201610308525.0A CN201610308525A CN105925253B CN 105925253 B CN105925253 B CN 105925253B CN 201610308525 A CN201610308525 A CN 201610308525A CN 105925253 B CN105925253 B CN 105925253B
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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
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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
- C09K8/473—Density reducing additives, e.g. for obtaining foamed cement compositions
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- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Sealing Material Composition (AREA)
Abstract
It include following parts by weight of component the invention discloses a kind of molten solidification sealing agent of low-density theobromine：50~100 parts of cementitious materials；50~100 parts of molten materials of acid；The molten bridge formation fiber of 0.5~5 part of theobromine；0.5~5 part of delayed expansion resin；0.1~0.5 part of sour soluble additive；0.5~5 part of gel regulator；5~20 parts of activator and 0.5~5 part of dispersing agent；Wherein, cementitious material is by sodium bentonite and blast-furnace cinder by weight 1:1~1:10 mix；The molten material of acid is agstone；The molten bridge formation fiber of theobromine is the sepiolite fibre that length is 1~2mm；The molten solidification sealing agent of the low-density theobromine is by having the characteristics that slurry density is low, strength development is fast, free of contamination to reservoir, suitable for the severe mud losses in target zone occur, while being also applied for the processing of non-object layer severe mud losses and needs that reservoir temporarily closes.
Description
Technical field
The present invention relates to leakage stopping technology field in oil drilling, in particular to a kind of molten solidification sealing agent of low-density theobromine.
Background technique
Leakage takes place frequently in drilling process, and when especially encountering the solution cavity or large fracture of no circumference, it is more usually to lose drilling fluid
It up to thousands of sides, has brought tremendous economic losses, has seriously affected the exploitation of block.For solution cavity or slit formation severe leakage,
Carrying out bridge joint leak stopping using drilling fluid can not be succeeded, and effective method is cementing plug, after theing cement solidifies
Seal hole.But intensity with higher after cement solidification, and acid-soluble difference cannot be released completely by acidizing treatment, work as leakage
It loses and occurs in target zone, oil-gas Layer can be brought and significantly be injured.
The molten cement of acid is usually that agstone, calcium carbonate superfine powder etc. are added in ordinary cement to improve acid-soluble ratio, to reach
The molten effect of theobromine, and the performance of cement slurry is adjusted by other additives, the needs for blocking target zone can be met.
But the cement slurry density prepared in this way is higher, is difficult to drop to 1.65g/cm3Hereinafter, being easy to cause leakage, and strong
Degree develops slowly, and cement slurry is soaked in water flooding in long-time, is constantly washed, dilutes, it is difficult to ensure that sealing matter
Amount.
Summary of the invention
The object of the present invention is to provide a kind of severe mud losses or non-object layer severe mud losses suitable for occurring in target zone
Processing and the molten solidification sealing agent of low-density theobromine of needs that temporarily closes of reservoir.
It is a further object of the present invention to provide a kind of molten easy-to-use preparations for solidifying sealing agent of above-mentioned low-density theobromine
Method.
For this purpose, technical solution of the present invention is as follows：
A kind of molten solidification sealing agent of low-density theobromine, including following parts by weight of component：
50~100 parts of cementitious materials；50~100 parts of molten materials of acid；The molten bridge formation fiber of 0.5~5 part of theobromine；0.5~5 part is prolonged
Slow swollen resin；0.1~0.5 part of sour soluble additive；0.5~5 part of gel regulator；5~20 parts of activator and 0.5~5 part of dispersion
Agent；Wherein, cementitious material is by sodium bentonite and blast-furnace cinder by weight 1:1~1:10 mix；The molten material of acid is lime
Mountain flour；The molten bridge formation fiber of theobromine is the sepiolite fibre that length is 1~2mm.
The molten fiber of theobromine can water swelling, with other materials put up a bridge be crosslinked, formed three-dimensional net structure, improve leak stopping slurry
Waterproof, water resistant ability；And acid-soluble ratio will not be had an impact.
Blast-furnace cinder fineness is 1000~1500 mesh.
The mesh number of agstone is 500~1000 mesh.
Delayed expansion resin be the copolymer of acrylamide and methacrylic acid, acrylamide and acrylic acid copolymer or
The copolymer of acrylamide, methacrylic acid and acrylic acid.Itself continue after delayed expansion resin makes leak stopping slurry reach drop ply swollen
It is swollen, have the function of certain expansion filling and Inner extrusion to the plugging material at drop ply, improves the closure energy of leak stopping wall
Power.
Sour soluble additive includes azodicarbonamide and unifor, and the two weight ratio is 1:1~1:5.
Further include in sour soluble additive additional amount be both azodicarbonamide and unifor gross mass 10~
50% lauryl sodium sulfate, the sour dissolution pore road point that the addition of lauryl sodium sulfate forms the leak stopping slurry surface after solidification
Scattered is more uniform.
Gel regulator is at least one of sodium carboxymethylcellulose, xanthan gum, polyacrylamide.Gel regulator makes to match
The slurry viscosity set increases, and hydrophobicity is strong, does not dilute and dissolves vulnerable to water flooding, and anti-impact brushing effects are good, is conducive to improve leak stopping
Success rate.
Activator is by waterglass and sodium hydroxide in mass ratio 1:1~1:3 mix.
Dispersing agent is calcium lignosulfonate or beta-naphthalenesulfonic-acid formaldehyde condensation compound or sulfonated acetone formaldehyde condensation products.
A kind of molten preparation method for solidifying leak stopping slurry of low-density theobromine, including step in detail below：
S1, weigh in proportion cementitious material, the molten material of acid, the molten bridge formation fiber of theobromine, delayed expansion resin, sour soluble additive,
Gel regulator and dispersing agent, and puddled uniformly；
S2, activator is weighed, be added into a certain amount of water, stirred to being completely dissolved, pour into the slurry of corrugation blender
In cup, wherein amount of water is 0.5~1.5 times of each component total weight；
S3, starting corrugation agitator motor and the revolving speed for keeping 4000r/min ± 200r/min, will puddle through step S1
Even solid mixture is poured slowly into stirring cup, is stirred evenly；
S4, stirring slurry cup cup lid is covered, and continues to stir 35s under the revolving speed of 12000r/min ± 500r/min, made each
Component is further uniformly mixed.
Compared with prior art, the molten solidification sealing agent of the low-density theobromine it is fast by, strength development low with slurry density,
To the free of contamination feature of reservoir, suitable for the severe mud losses in target zone occur, while it being also applied for non-object layer severe mud losses
Processing and the needs that temporarily close of reservoir.
Specific embodiment
The present invention is described further combined with specific embodiments below, but following embodiments absolutely not to the present invention have appoint
What is limited.
Each component weighs number and refers both to parts by weight in following embodiment, and each component can be obtained directly from market purchasing.Its
In, delayed expansion resin selects the macromolecule water uptake tree of 0.1~1.5cm of partial size of Renqiu City Quan Xing Chemical Co., Ltd. production
Rouge.
Embodiment 1
50 parts of sodium bentonites and blast-furnace cinder are weighed by weight 1:9 mix cementitious material, 50 parts of agstones,
3 parts of sepiolite fibres, 0.5 part of delayed expansion resin, 0.1 part by azodicarbonamide and unifor by weight 1:3
Sour soluble additive, 2 parts of sodium carboxymethylcelluloses and the 1.5 parts of calcium lignosulfonates mixed, and puddled uniformly, it is mixed
Mix uniform solid mixture；9 parts of waterglass and sodium hydroxide are weighed by weight 1:1.5 activator mixed, and add
Enter in 120 parts of water, stirs to being completely dissolved, pour into the slurry cup of corrugation blender；Starting corrugation agitator motor is simultaneously kept
The revolving speed of 4000r/min ± 200r/min will be puddled uniform solid mixture and be poured slowly into stirring cup, stirs evenly；Lid
Upper stirring slurry cup cup lid, and continue to stir 35s under the revolving speed of 12000r/min ± 500r/min to get molten to low-density theobromine
Solidify leak stopping and starches I.
Embodiment 2
60 parts of sodium bentonites and blast-furnace cinder are weighed by weight 1:7 mix cementitious material, 50 parts of agstones,
2 parts of sepiolite fibres, 0.5 part of delayed expansion resin, 0.1 part by azodicarbonamide and unifor by weight 1:3
The sour soluble additive that mixes, the lauryl sodium sulfate for accounting for azodicarbonamide and unifor total weight 10%, 2 parts
Sodium carboxymethylcellulose and 1.5 parts of calcium lignosulfonates, and puddled uniformly, it obtains puddling uniform solid mixture；Claim
Take 8.5 parts of waterglass and sodium hydroxide by weight 1:1.5 activator mixed, and be added in 110 parts of water, it stirs to complete
Fully dissolved is poured into the slurry cup of corrugation blender；Starting corrugation agitator motor simultaneously keeps turning for 4000r/min ± 200r/min
Speed will be puddled uniform solid mixture and be poured slowly into stirring cup, stirs evenly；It covers and stirs slurry cup cup lid, and
Continue to stir 35s under the revolving speed of 12000r/min ± 500r/min to get the molten solidification leak stopping slurry II of low-density theobromine is arrived.
Embodiment 3
75 parts of sodium bentonites and blast-furnace cinder are weighed by weight 1:7 mix cementitious material, 60 parts of agstones,
1.5 parts of sepiolite fibres, 1 part of delayed expansion resin, 0.2 part by azodicarbonamide and unifor by weight 1:3
The sour soluble additive that mixes, the lauryl sodium sulfate for accounting for azodicarbonamide and unifor total weight 10%, 1.5
Part sodium carboxymethylcellulose and 1.5 parts of calcium lignosulfonates, and puddled uniformly, it obtains puddling uniform solid mixture；
9 parts of waterglass and sodium hydroxide are weighed by weight 1:1.3 activator mixed, and be added in 125 parts of water, it stirs to complete
Fully dissolved is poured into the slurry cup of corrugation blender；Starting corrugation agitator motor simultaneously keeps turning for 4000r/min ± 200r/min
Speed will be puddled uniform solid mixture and be poured slowly into stirring cup, stirs evenly；It covers and stirs slurry cup cup lid, and
Continue to stir 35s under the revolving speed of 12000r/min ± 500r/min to get the molten solidification leak stopping slurry III of low-density theobromine is arrived.
Embodiment 4
90 parts of sodium bentonites and blast-furnace cinder are weighed by weight 1:5 mix cementitious material, 70 parts of agstones,
1 part of sepiolite fibre, 1.5 parts of delayed expansion resins, 0.2 part by azodicarbonamide and unifor by weight 1:3
The sour soluble additive that mixes, the lauryl sodium sulfate for accounting for azodicarbonamide and unifor total weight 10%, 0.8
Part sodium carboxymethylcellulose and 1.2 parts of calcium lignosulfonates, and puddled uniformly, it obtains puddling uniform solid mixture；
11 parts of waterglass and sodium hydroxide are weighed by weight 1:1.2 activator mixed, and be added in 140 parts of water, stirring is extremely
It is completely dissolved, pours into the slurry cup of corrugation blender；Starting corrugation agitator motor simultaneously keeps 4000r/min ± 200r/min's
Revolving speed will be puddled uniform solid mixture and be poured slowly into stirring cup, stirs evenly；It covers and stirs slurry cup cup lid, and
Continue to stir 35s under the revolving speed of 12000r/min ± 500r/min to get the molten solidification leak stopping slurry IV of low-density theobromine is arrived.
Embodiment 5
100 parts of sodium bentonites and blast-furnace cinder are weighed by weight 1:5 mix cementitious material, 80 parts of lime stones
Powder, 1 part of sepiolite fibre, 2 parts of delayed expansion resins, 0.2 part by azodicarbonamide and unifor by weight 1:3
The sour soluble additive that mixes, the lauryl sodium sulfate for accounting for azodicarbonamide and unifor total weight 10%, 0.6
Part sodium carboxymethylcellulose and 1 part of calcium lignosulfonate, and puddled uniformly, it obtains puddling uniform solid mixture；Claim
Take 11 parts of waterglass and sodium hydroxide by weight 1:1.2 activator mixed, and be added in 140 parts of water, it stirs to complete
Fully dissolved is poured into the slurry cup of corrugation blender；Starting corrugation agitator motor simultaneously keeps turning for 4000r/min ± 200r/min
Speed will be puddled uniform solid mixture and be poured slowly into stirring cup, stirs evenly；It covers and stirs slurry cup cup lid, and
Continue to stir 35s under the revolving speed of 12000r/min ± 500r/min to get the molten solidification leak stopping slurry V of low-density theobromine is arrived.
Performance test：
The molten leak stopping performance for solidifying leak stopping slurry I~V of low-density theobromine prepared by above-described embodiment 1~5 is successively carried out close
Degree, fluidity, shrinking percentage, compression strength and acid-soluble ratio test, test result is as follows shown in table 1；Wherein：
The test method of fluidity is：Glass plate is placed on horizontal position, justifies mould with wet cloth friction glass plate, truncated cone,
Truncated cone circle mould is placed on to the center of glass plate, is covered with wet cloth spare.The leak stopping being stirred slurry is poured into truncated cone circle mould, is lifted
Truncated cone justifies mould, and the maximum gauge freely to trickle on glass sheet plane is starched in measurement leak stopping；
The measuring method of Behavior of Hardened Cement Paste shrinking percentage is：Using Behavior of Hardened Cement Paste square length-measuring method.By cement slurry at normal pressure, 50 DEG C
Maintenance measures height after its expansion, and compare with mold height value, shrinking percentage is calculated as follows after its solidification：
In formula：L is shrinking percentage, %；
l1For mold height, mm；
l2For Behavior of Hardened Cement Paste height after solidification, mm；
The measuring method of acid-soluble ratio is：Leak stopping slurry is maintained into cement briquette, takes out Behavior of Hardened Cement Paste, removes sea surface oil slick, system
It at 2cm × 1cm × 1cm cuboid, is polished smooth, is weighed in the balance with sand paper, the salt of 150mL15% is put it into after weighing
In acid solution, after dissolving 2h, undissolved Behavior of Hardened Cement Paste is weighed, by the acid-soluble ratio that Behavior of Hardened Cement Paste is calculated.
Table 1：
It can be seen from shown in upper table 1 through with obtained low-density theobromine after water mixture is molten solidify leak stopping and starch the close of I~V
Degree is in 1.35~1.5g/cm3Between, head of liquid is reduced, leak stopping slurry pressure leakage stratum is effectively prevent；Moderate fluidity makes to block up
Spillage can smoothly arrive at drop ply, and rest on drop ply；Behavior of Hardened Cement Paste shrinking percentage≤0, Behavior of Hardened Cement Paste have micro-expansion characteristics, can incite somebody to action
Drop ply blocks completely, does not leave leakage channel；Through normal pressure, 50 DEG C, compression strength is greater than 5MP after 8h maintenance, is effectively saved
The time for handling leakage, avoiding slurry and contacting for a long time with water flooding influences sealing quality；Acid-soluble ratio > 95%, will not be to storage
Layer pollutes.
In addition, sour soluble additive is type acid soluble additive of getting angry, after leak stopping, which is starched, to be solidified, by naked eyes it can be observed that surface
It is evenly distributed with tiny, the uniform stomata that diameter is less than 1mm, leaves etching channels for acid solution, improves the molten efficiency of acid, but
The intensity that will not be starched leak stopping has an impact.
Claims (9)
1. a kind of molten solidification sealing agent of low-density theobromine, which is characterized in that including following parts by weight of component：50~100 parts of gellings
Material；50~100 parts of molten materials of acid；The molten bridge formation fiber of 0.5~5 part of theobromine；0.5~5 part of delayed expansion resin；0.1~0.5 part
Sour soluble additive；0.5~5 part of gel regulator；5~20 parts of activator and 0.5~5 part of dispersing agent；Wherein, cementitious material is swollen by sodium
Profit soil and blast-furnace cinder are by weight 1:1~1:10 mix；The molten material of acid is agstone；The molten bridge formation fiber of theobromine is length
Degree is the sepiolite fibre of 1~2mm；
Wherein, blast-furnace cinder fineness is 1000~1500 mesh.
2. the molten solidification sealing agent of low-density theobromine according to claim 1, which is characterized in that the mesh number of agstone is
500~1000 mesh.
3. the molten solidification sealing agent of low-density theobromine according to claim 1, which is characterized in that delayed expansion resin is propylene
Copolymer or acrylamide, the methacrylic acid and propylene of the copolymer of amide and methacrylic acid, acrylamide and acrylic acid
The copolymer of acid.
4. the molten solidification sealing agent of low-density theobromine according to claim 1, which is characterized in that sour soluble additive includes azo two
Formamide and unifor, and the two weight ratio is 1:1~1:5.
5. the molten solidification sealing agent of low-density theobromine according to claim 4, which is characterized in that further include adding in sour soluble additive
Enter 10~50% lauryl sodium sulfate that amount is both azodicarbonamide and unifor gross mass.
6. the molten solidification sealing agent of low-density theobromine according to claim 1, which is characterized in that gel regulator is carboxymethyl
At least one of sodium cellulosate, xanthan gum, polyacrylamide.
7. the molten solidification sealing agent of low-density theobromine according to claim 1, which is characterized in that activator is by waterglass and hydrogen
Sodium oxide molybdena in mass ratio 1:1~1:3 mix.
8. the molten solidification sealing agent of low-density theobromine according to claim 1, which is characterized in that dispersing agent is lignin sulfonic acid
Calcium or beta-naphthalenesulfonic-acid formaldehyde condensation compound or sulfonated acetone formaldehyde condensation products.
9. a kind of molten preparation method for solidifying leak stopping slurry of low-density theobromine as described in any one of claims 1 to 8, feature exist
In, including step in detail below：
S1, cementitious material, the molten material of acid, the molten bridge formation fiber of theobromine, delayed expansion resin, sour soluble additive, gel are weighed in proportion
Regulator and dispersing agent, and puddled uniformly；
S2, activator is weighed, is added into a certain amount of water, stirred to being completely dissolved, pour into the slurry cup of corrugation blender,
Wherein, amount of water is 0.5~1.5 times of each component total weight；
S3, starting corrugation agitator motor and the revolving speed for keeping 4000r/min ± 200r/min, will puddle uniformly through step S1
Solid mixture is poured slowly into stirring cup, is stirred evenly；
S4, stirring slurry cup cup lid is covered, and continues to stir 35s under the revolving speed of 12000r/min ± 500r/min.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107011875A (en) * | 2017-04-12 | 2017-08-04 | 中国石油化工股份有限公司 | A kind of drilling fluid crack sealing agent and preparation method thereof |
| CN109206109B (en) * | 2017-07-05 | 2021-11-30 | 中国石油天然气股份有限公司 | Plugging agent and preparation method and application thereof |
| CN110819321B (en) * | 2018-08-13 | 2021-12-28 | 中国石油化工股份有限公司 | Curing plugging agent, preparation method thereof and plugging slurry |
| CN109321218B (en) * | 2018-11-15 | 2021-04-06 | 中国石油集团渤海钻探工程有限公司 | Low-pressure leakage layer plugging agent and preparation method thereof |
| CN113248183B (en) * | 2021-06-22 | 2022-07-15 | 山东孟友新材料科技有限责任公司 | Plugging agent prepared from glass slag and preparation method and application thereof |
| CN114163202B (en) * | 2021-10-29 | 2023-03-07 | 中国石油天然气集团有限公司 | Controllable curing plugging agent for natural gas hydrate reservoir and preparation method thereof |
| CN117070202B (en) * | 2023-10-17 | 2023-12-22 | 西南石油大学 | Acid-soluble high-strength consolidation plugging agent and preparation method thereof |
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