CN105524600A - Plugging while drilling agent for oil-based drilling fluid and preparation method of plugging while drilling agent - Google Patents
Plugging while drilling agent for oil-based drilling fluid and preparation method of plugging while drilling agent Download PDFInfo
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- CN105524600A CN105524600A CN201610102238.4A CN201610102238A CN105524600A CN 105524600 A CN105524600 A CN 105524600A CN 201610102238 A CN201610102238 A CN 201610102238A CN 105524600 A CN105524600 A CN 105524600A
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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
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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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
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
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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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/18—Bridging agents, i.e. particles for temporarily filling the pores of a formation; Graded salts
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Abstract
The invention discloses a plugging while drilling agent for oil-based drilling fluid. The plugging while drilling agent comprises, by mass, 20-30 parts of deformable particles, 10-15 parts of elastic deformation particles, 5-10 parts of lightweight bridging particles and 40-70 parts of calcium carbonate. The plugging while drilling agent has the advantages that the plugging materials adopted are all inert materials and have good compatibility with the oil-based drilling fluid and environment friendliness; filtration reduction effect is achieved, and dense mud cakes can be formed on the well wall so as to prevent permeable loss; by the hard and soft plugging principle of plugging with rigid materials and filling with the deformable particles and elastic materials, flow-back re-leaking of plugging materials and induced fractures during tripping operation can be effectively prevented.
Description
Technical field
The present invention relates to petroleum drilling technology field, be specifically related to a kind of oil base drilling fluid drill-feeding plugging agent and preparation method thereof.
Background technology
Oil base drilling fluid drilling well has excellent stability and oilness, and anti-pollution ability is strong, can be recycled, and has become the requisite gordian technique of unconventionaloil pool exploitation.Although oil base drilling fluid strong inhibition capability, leakage is still the problem that can not be ignored in oil base drilling fluid drilling process.Existing specially for oil base drilling fluid leakproof, leakage stopping technology immature, conventional blocking method has bridge to starch leak stopping, the leak stopping of high leak-off slurry, gel and resin leak stopping, cement leak stopping etc., but these blocking methods all need to stop boring to carry out leak stopping specially, extend the activity duration, increase operating cost.Adopt existing lost circulation additive material mostly to be hydrophilic oleophobic shaped material and oil base drilling fluid compatibleness poor, and long-time use that easily fermentation is rotten affects plugging effect, oil base drilling fluid lost circulation additive can not be used for.
Chinese invention patent application number is in the patent application of 200810224440.X, and recording patent name is a kind of drilling fluid plugging agent while drilling, mainly comprises vegetable fibre, pitch, graphite, weak water absorbent gel etc.; Chinese invention patent " a kind of drill-feeding plugging agent and preparation method thereof " (application number: 200810115975.3), a kind of drill-feeding plugging agent comprises following component: shell powder, limestone powder, oil-soluble resin etc.; Chinese invention patent application number is in the patent application document of 201410428352.7, and recording patent name is that the agent of a kind of oil base drilling fluid fracture plugging consists of: oil swell material, deformed shaped particles, filamentary material, patching materials, calcium carbonate superfine powder, tensio-active agent; Chinese invention patent application number is in the patent application of 201310600221.8, recording patent name is a kind of oil base drilling fluid microfracture plugging agent and preparation method, mainly cationic emulsified bitumen, latex bitumen, latex paraffin and span 80 are mixed with base fluid, hybrid nanoscale, 500 orders, 800 order calcium carbonate, primary seal blocking agent and auxiliary plugging agent etc. in proportion for they.Chinese invention patent application number is in the patent application document of 201410602573.1, the aqueous phase that the preparation method recording a kind of oil base drilling fluid drill-feeding plugging agent contains propylene class water-soluble organic monomer A, water-soluble cross-linker B and powdered inorganic material C is added dropwise in the oily D containing dispersion agent E, after emulsification, redox initiation system is utilized to cause and obtain stable suspersion plugging agent.
All there is certain deficiency and defect in above-mentioned drill-feeding plugging agent: the lost circulation additive material 1) selected mostly is hydrophilic material, poor with oil base drilling fluid compatibleness; 2) patching materials had is vegetable matter, once phenomenons such as producing fermentative degradation is sent out in long meeting cycling time, not only affects plugging effect, also can affect oil base drilling fluid performance; 3) adopt water suction, oil suction expandable plugging additives more, use with brill after patching materials expands and not easily sieve.4) selected calcium carbonate mostly is below 300 orders, and can only be used for plugging permeable leakage stratum, when boring chance microfracture, shut-off capacity is poor; 5) patching materials size distribution is single, and in lost circulation additive process, shutoff flaw size must match with aperture, has limitation.
Summary of the invention
For the defect existed in prior art, the object of the present invention is to provide a kind of oil base drilling fluid drill-feeding plugging agent and preparation method thereof, there is leak-proof leak-stopping double effects.
For reaching above object, the technical scheme that the present invention takes is:
A kind of oil base drilling fluid drill-feeding plugging agent, in mass fraction, comprises following composition, deformable particle 20-30 part, recoverable deformation particle 10-15 part, light crane span structure particle 5-10 part, calcium carbonate 40-70 part.
On the basis of technique scheme, described deformable particle is in mass fraction, and it comprises following composition, high molecular polymer 0-20 part, rock asphalt 20-40 part, sulfonated gilsonite 20-40 part, modifying asphalt 20-40 part.
On the basis of technique scheme, the material of described elastic granule is elastic graphite.
On the basis of technique scheme, described lightweight bridge formation particle is light cement particle.
On the basis of technique scheme, every a described calcium carbonate is 0-20 part 60 object marble particle, 20-40 part 100 object marble particle and 40-80 part 300 object marble granular mixture.
On the basis of technique scheme, comprise the following steps,
Step 1, prepares deformable particle;
Step 2, prepares elastic granule;
Step 3, prepares light crane span structure particle;
Step 4, prepares calcium carbonate granule;
Step 5, calcium carbonate granule mixing prepared by light crane span structure particle prepared by elastic granule, step 3 prepared by deformable particle step 1 prepared, step 2 and step 4.
On the basis of technique scheme, wherein, the step of deformable particle is prepared in step 1
It is rapid as follows,
1) by the high molecular polymer of 0-20 part, the rock asphalt of 20-40 part, the sulfonated gilsonite of 20-40 part, the modifying asphalt of 20-40 part is composite obtains composite grain;
2) adopt sizing screen to step 1) composite after obtain composite grain and carry out stage treatment, choose the particle of diameter below 60 orders.
On the basis of technique scheme, wherein, the step of elastic granule is prepared in step 2
It is as follows,
1) heavy bitumen or thermoplastic resin are heat-treated the temperature of 350-500 DEG C and are obtained Carbonaceous mesophase;
2) at the temperature of 100 DEG C, hot nitration treatment is carried out to Carbonaceous mesophase with the mixed solution of sulfuric acid and concentrated nitric acid and obtain nitrated Carbonaceous mesophase;
3) when PH < 2, precipitation carried out to nitrated Carbonaceous mesophase and obtain pureed precipitate, this precipitate is filtered, after dry, granulation, obtain water-soluble Carbonaceous mesophase;
4) at 300 DEG C, carried out by water-soluble Carbonaceous mesophase expanding, foaming, then carry out greying at temperature more than 2400 DEG C and obtain elastic graphite, described elastic granule is elastic graphite.
On the basis of technique scheme, wherein, light crane span structure particle is prepared in step 3
Step is as follows,
1) in grout, add hollow glass micropearl, flyash and SILICA FUME to be proportionally in harmonious proportion, the density of the grout after mediation is between 1.4-2.3;
2) under normal temperature state, after maintenance to some strength, crusher is adopted to carry out fragmentation the grout after mediation;
3) particle sieving out below 60 orders is light crane span structure particle.
On the basis of technique scheme, the step preparing calcium carbonate in step 4 is as follows, by composite to 0-20 part 60 object marble particle, 20-40 part 100 object marble particle and 40-80 part 300 object marble particle, wherein marmorean acid-soluble ratio is greater than 90%.
Compared with prior art, the invention has the advantages that:
(1) a kind of oil base drilling fluid drill-feeding plugging agent of the present invention, the patching materials adopted is all inert material, has good compatibleness and environment friendly with oil base drilling fluid.
(2) a kind of oil base drilling fluid drill-feeding plugging agent of the present invention has good filtrate reducing effect, can form fine and close mud cake at the borehole wall thus reach the generation of prevention permeability loss.
(3) particle diameter of a kind of oil base drilling fluid drill-feeding plugging agent of the present invention is through strict control, applied range, can not affect again while shutoff crack and normally creeps into;
(4) a kind of oil base drilling fluid drill-feeding plugging agent of the present invention have employed the leak stopping principle of coupling hardness with softness of rigid material shutoff, deformed shaped particles and resilient material filling, and that effectively can prevent patching materials in the process of making a trip returns the generation of telling multiple leakage and induced fractures.
Embodiment
Further illustrate a kind of composition and performance thereof being suitable for the drill-feeding plugging agent of oil base drilling fluid leak stopping provided by the present invention below in conjunction with example, but do not limit the present invention.
Embodiment 1:
A kind of oil base drilling fluid drill-feeding plugging agent of the present embodiment, in mass fraction, takes each component according to following proportioning:
20 parts of deformable particles+10 parts of elastic granules+5 parts of light crane span structure particles+40 parts of calcium carbonate granules, the wherein density p=1.40g/cm of calcium carbonate granule
3
A preparation method for oil base drilling fluid drill-feeding plugging agent, by 20 parts of deformable particles, 10 parts of elastic granules, 5 parts of light crane span structure particles and 40 parts of calcium carbonate granule mixing.
Wherein, the step preparing deformable particle is as follows,
1) by the high molecular polymer of 0-20 part, the rock asphalt of 20-40 part, the sulfonated gilsonite of 20-40 part, the modifying asphalt of 20-40 part is composite obtains composite grain;
2) adopt sizing screen to step 1) composite after obtain composite grain and carry out stage treatment, choose the particle of diameter below 60 orders.
Wherein, the step preparing elastic granule is as follows,
1) heavy bitumen or thermoplastic resin are heat-treated the temperature of 350-500 DEG C and are obtained Carbonaceous mesophase;
2) at the temperature of 100 DEG C, hot nitration treatment is carried out to Carbonaceous mesophase with the mixed solution of sulfuric acid and concentrated nitric acid and obtain nitrated Carbonaceous mesophase;
3) when PH < 2, precipitation carried out to nitrated Carbonaceous mesophase and obtain pureed precipitate, this precipitate is filtered, after dry, granulation, obtain water-soluble Carbonaceous mesophase;
4) at 300 DEG C, carried out by water-soluble Carbonaceous mesophase expanding, foaming, then carry out greying at temperature more than 2400 DEG C and obtain elastic graphite, described elastic granule is elastic graphite.
Wherein, the step preparing light crane span structure particle is as follows,
1) in grout, add hollow glass micropearl, flyash and SILICA FUME to be proportionally in harmonious proportion, the density of the grout after mediation is between 1.4-2.3;
2) under normal temperature state, after maintenance to some strength, crusher is adopted to carry out fragmentation the grout after mediation;
3) particle sieving out below 60 orders is light crane span structure particle.
Wherein, the step preparing calcium carbonate is as follows, and by composite to 0-20 part 60 object marble particle, 20-40 part 100 object marble particle and 40-80 part 300 object marble particle, wherein marmorean acid-soluble ratio is greater than 90%.
Embodiment 2:
A kind of oil base drilling fluid drill-feeding plugging agent of the present embodiment, in mass fraction, takes each component according to following proportioning:
20 parts of deformable particles+15 parts of elastic granules+10 parts of light crane span structure particles+70 parts of calcium carbonate granules, the wherein density p=1.40g/cm of calcium carbonate granule
3
A preparation method for oil base drilling fluid drill-feeding plugging agent, by 20 parts of deformable particles, 15 parts of elastic granules, 10 parts of light crane span structure particles and 70 parts of calcium carbonate granule mixing.
Wherein, the step preparing deformable particle is as follows,
1) by the high molecular polymer of 0-20 part, the rock asphalt of 20-40 part, the sulfonated gilsonite of 20-40 part, the modifying asphalt of 20-40 part is composite obtains composite grain;
2) adopt sizing screen to step 1) composite after obtain composite grain and carry out stage treatment, choose the particle of diameter below 60 orders.
Wherein, the step preparing elastic granule is as follows,
1) heavy bitumen or thermoplastic resin are heat-treated the temperature of 350-500 DEG C and are obtained Carbonaceous mesophase;
2) at the temperature of 100 DEG C, hot nitration treatment is carried out to Carbonaceous mesophase with the mixed solution of sulfuric acid and concentrated nitric acid and obtain nitrated Carbonaceous mesophase;
3) when PH < 2, precipitation carried out to nitrated Carbonaceous mesophase and obtain pureed precipitate, this precipitate is filtered, after dry, granulation, obtain water-soluble Carbonaceous mesophase;
4) at 300 DEG C, carried out by water-soluble Carbonaceous mesophase expanding, foaming, then carry out greying at temperature more than 2400 DEG C and obtain elastic graphite, described elastic granule is elastic graphite.
Wherein, the step preparing light crane span structure particle is as follows,
1) in grout, add hollow glass micropearl, flyash and SILICA FUME to be proportionally in harmonious proportion, the density of the grout after mediation is between 1.4-2.3;
2) under normal temperature state, after maintenance to some strength, crusher is adopted to carry out fragmentation the grout after mediation;
3) particle sieving out below 60 orders is light crane span structure particle.
Wherein, the step preparing calcium carbonate is as follows, and by composite to 0-20 part 60 object marble particle, 20-40 part 100 object marble particle and 40-80 part 300 object marble particle, wherein marmorean acid-soluble ratio is greater than 90%.
Embodiment 3:
A kind of oil base drilling fluid drill-feeding plugging agent of the present embodiment, in mass fraction, takes each component according to following proportioning:
30 parts of deformable particles+12 parts of elastic granules+8 parts of light crane span structure particles+55 parts of calcium carbonate granules, the wherein density p=1.40g/cm of calcium carbonate granule
3
A preparation method for oil base drilling fluid drill-feeding plugging agent, by 30 parts of deformable particles, 12 parts of elastic granules, 8 parts of light crane span structure particles and 55 parts of calcium carbonate granule mixing.
Wherein, the step preparing deformable particle is as follows,
1) by the high molecular polymer of 0-20 part, the rock asphalt of 20-40 part, the sulfonated gilsonite of 20-40 part, the modifying asphalt of 20-40 part is composite obtains composite grain;
2) adopt sizing screen to step 1) composite after obtain composite grain and carry out stage treatment, choose the particle of diameter below 60 orders.
Wherein, the step preparing elastic granule is as follows,
1) heavy bitumen or thermoplastic resin are heat-treated the temperature of 350-500 DEG C and are obtained Carbonaceous mesophase;
2) at the temperature of 100 DEG C, hot nitration treatment is carried out to Carbonaceous mesophase with the mixed solution of sulfuric acid and concentrated nitric acid and obtain nitrated Carbonaceous mesophase;
3) when PH < 2, precipitation carried out to nitrated Carbonaceous mesophase and obtain pureed precipitate, this precipitate is filtered, after dry, granulation, obtain water-soluble Carbonaceous mesophase;
4) at 300 DEG C, carried out by water-soluble Carbonaceous mesophase expanding, foaming, then carry out greying at temperature more than 2400 DEG C and obtain elastic graphite, described elastic granule is elastic graphite.
Wherein, the step preparing light crane span structure particle is as follows,
1) in grout, add hollow glass micropearl, flyash and SILICA FUME to be proportionally in harmonious proportion, the density of the grout after mediation is between 1.4-2.3;
2) under normal temperature state, after maintenance to some strength, crusher is adopted to carry out fragmentation the grout after mediation;
3) particle sieving out below 60 orders is light crane span structure particle.
Wherein, the step preparing calcium carbonate is as follows, and by composite to 0-20 part 60 object marble particle, 20-40 part 100 object marble particle and 40-80 part 300 object marble particle, wherein marmorean acid-soluble ratio is greater than 90%.
A kind of oil base drilling fluid drill-feeding plugging agent embodiment 1, embodiment 2, embodiment 3 prepared adds in drilling fluid, and experimental result is as follows:
The each embodiment fundamental property of table 1
Note:
AV: drilling fluid apparent viscosity, mPas
PV: drilling fluid plastic viscosity, mPas
YP: drilling fluid yield value, Pa
The fast rotational viscosimeter of Φ 6: six 6 turns of readings, zero dimension
The fast rotational viscosimeter of Φ 3: six 3 turns of readings, zero dimension
HTHP: drilling fluid high-temperature high pressure dehydration (3.5MPa, 100 DEG C, 30min), mL
ES: emulsion-breaking voltage, V
Wherein, base slurry forms according to following component configuration: diesel oil+primary emulsion+auxiliary emulsifying agent+2.5% organophilic clay+2.5% fluid loss agent+2.0% calcium oxide+barite increases the weight of to 1.40.
Base slurry is under 100 DEG C of conditions, and heat rolls 16h.
Drill-feeding plugging agent obtained by the present invention and oil base drilling fluid compatibleness well, can also reduce the filtration property of drilling fluid simultaneously, at sealing fluid while drilling after heat is rolled 7 days, still maintain good performance.
2) lost circulation additive casting bed invasion depth experiment:
Plugging agent and the base slurry of the plugging agent of base slurry+1%-4% embodiment 1, the plugging agent of base slurry+1%-4% embodiment 2, base slurry+1%-4% embodiment 3 do the experiment of casting bed pressure-bearing;
Experimental procedure:
1. adopt 10-20 order quartz sand 300g, load in fill out sand tube;
2. pour drilling fluid 200g to be measured into, be slowly forced into 0.7MPA, keep 30min;
Table 2 drill-feeding plugging agent casting bed invasion depth is tested
3) crack plugging effect evaluation experiment:
Indoor employing High Temperature High Pressure simulated formation crack shutoff tester comes simulated formation crack, adopt the plugging agent preparation 3L leak stopping slurry of the plugging agent of the plugging agent of base slurry+1%-4% embodiment 1, base slurry+1%-4% embodiment 2, base slurry+1%-4% embodiment 3 respectively, shutoff 1-3mm simulation fracture, plugging effect is in table 3:
The shutoff experiment of table 3 drill-feeding plugging agent crack
Rig-site utilization:
After the success of oil base drilling fluid plugging technology while drilling desk research, we have carried out rig-site utilization in shale gas field, burnt masonry dam area in Fuling Chongqing, this area's zone of interest is Longma small stream group-five peak group shale gas interval, there is the crack much differed in size, in drilling process, easily cause the leakage varied in size, and objective interval employing is oil base drilling fluid drilling well.Use a bite exploitation well burnt page 44-3HF well at first, drilling well according to this platform offset well data analysis identical platform all there occurs leakage in horizontal section drilling process, and earthquake prediction is presented at this well horizontal section there is 2-3 leak source, so easily there is leakage in horizontal section operation process.Based on these situations, consider the practical situation that drilling well is ageing and on-the-spot, suggestion is crept at this well and add drill-feeding plugging agent to A target spot 3550m, density domination about 1.38, and supplements a lost circulation additive material before prediction leak source, and this lost circulation additive material improves the bearing capacity of shale formation, in time shutoff has been carried out to microfracture stratum, the development of prevent crevice, reduces the filtration property of oil base drilling fluid, until finishing drilling is not all missed.
In this drill-feeding plugging agent process of use, the performance of oil base drilling fluid does not change substantially, also has certain filtrate loss controllability simultaneously; Reciprocating sieve adopts 40 mesh sieve cloth, does not have running pulp phenomenon.The leak stopping more than 30 times in 9 mouthfuls of well drilling process of this technology, result of use is good.
The present invention is not limited to above-mentioned embodiment, and for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications are also considered as within protection scope of the present invention.The content be not described in detail in this specification sheets belongs to the known prior art of professional and technical personnel in the field.
Claims (10)
1. an oil base drilling fluid drill-feeding plugging agent, is characterized in that: in mass fraction, comprises following composition, deformable particle 20-30 part, recoverable deformation particle 10-15 part, light crane span structure particle 5-10 part, calcium carbonate 40-70 part.
2. a kind of oil base drilling fluid drill-feeding plugging agent as claimed in claim 1, is characterized in that: described deformable particle is in mass fraction, and it comprises following composition, high molecular polymer 0-20 part, rock asphalt 20-40 part, sulfonated gilsonite 20-40 part, modifying asphalt 20-40 part.
3. a kind of oil base drilling fluid drill-feeding plugging agent as claimed in claim 1, is characterized in that: the material of described elastic granule is elastic graphite.
4. a kind of oil base drilling fluid drill-feeding plugging agent as claimed in claim 1, is characterized in that: described lightweight bridge formation particle is light cement particle.
5. a kind of oil base drilling fluid drill-feeding plugging agent as claimed in claim 1, is characterized in that: every a described calcium carbonate is 0-20 part 60 object marble particle, 20-40 part 100 object marble particle and 40-80 part 300 object marble granular mixture.
6. the preparation method of a kind of oil base drilling fluid drill-feeding plugging agent as claimed in claim 1, is characterized in that: comprise the following steps,
Step 1, prepares deformable particle;
Step 2, prepares elastic granule;
Step 3, prepares light crane span structure particle;
Step 4, prepares calcium carbonate granule;
Step 5, calcium carbonate granule mixing prepared by light crane span structure particle prepared by elastic granule, step 3 prepared by deformable particle step 1 prepared, step 2 and step 4.
7. the preparation method of a kind of oil base drilling fluid drill-feeding plugging agent as claimed in claim 6, it is characterized in that: wherein, the step preparing deformable particle in step 1 is as follows,
1) by the high molecular polymer of 0-20 part, the rock asphalt of 20-40 part, the sulfonated gilsonite of 20-40 part, the modifying asphalt of 20-40 part is composite obtains composite grain;
2) adopt sizing screen to step 1) composite after obtain composite grain and carry out stage treatment, choose the particle of diameter below 60 orders.
8. the preparation method of a kind of oil base drilling fluid drill-feeding plugging agent as claimed in claim 6, it is characterized in that: wherein, the step preparing elastic granule in step 2 is as follows,
1) heavy bitumen or thermoplastic resin are heat-treated the temperature of 350-500 DEG C and are obtained Carbonaceous mesophase;
2) at the temperature of 100 DEG C, hot nitration treatment is carried out to Carbonaceous mesophase with the mixed solution of sulfuric acid and concentrated nitric acid and obtain nitrated Carbonaceous mesophase;
3) when PH < 2, precipitation carried out to nitrated Carbonaceous mesophase and obtain pureed precipitate, this precipitate is filtered, after dry, granulation, obtain water-soluble Carbonaceous mesophase;
4) at 300 DEG C, carried out by water-soluble Carbonaceous mesophase expanding, foaming, then carry out greying at temperature more than 2400 DEG C and obtain elastic graphite, described elastic granule is elastic graphite.
9. the preparation method of a kind of oil base drilling fluid drill-feeding plugging agent as claimed in claim 6, it is characterized in that: wherein, the step preparing light crane span structure particle in step 3 is as follows,
1) in grout, add hollow glass micropearl, flyash and SILICA FUME to be proportionally in harmonious proportion, the density of the grout after mediation is between 1.4-2.3;
2) under normal temperature state, after maintenance to some strength, crusher is adopted to carry out fragmentation the grout after mediation;
3) particle sieving out below 60 orders is light crane span structure particle.
10. the preparation method of a kind of oil base drilling fluid drill-feeding plugging agent as claimed in claim 6, it is characterized in that: the step preparing calcium carbonate in step 4 is as follows, by composite to 0-20 part 60 object marble particle, 20-40 part 100 object marble particle and 40-80 part 300 object marble particle, wherein marmorean acid-soluble ratio is greater than 90%.
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| CN201610102238.4A CN105524600A (en) | 2016-02-24 | 2016-02-24 | Plugging while drilling agent for oil-based drilling fluid and preparation method of plugging while drilling agent |
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| CN201610102238.4A CN105524600A (en) | 2016-02-24 | 2016-02-24 | Plugging while drilling agent for oil-based drilling fluid and preparation method of plugging while drilling agent |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106085381A (en) * | 2016-06-02 | 2016-11-09 | 中国海洋石油总公司 | With brill pressure-bearing reinforcing agent and application thereof and oil base drilling fluid |
| CN108793150A (en) * | 2018-08-08 | 2018-11-13 | 天津渤海中联石油科技有限公司 | A kind of elastic graphite and preparation method thereof |
| CN108841366A (en) * | 2018-06-13 | 2018-11-20 | 中国石油天然气股份有限公司 | A kind of high temperature lost circulation prevention sealing agent and its preparation method and application |
| CN108977181A (en) * | 2017-06-02 | 2018-12-11 | 中石化石油工程技术服务有限公司 | Oil base drilling fluid sealing agent and preparation method |
| CN109097013A (en) * | 2018-09-06 | 2018-12-28 | 中国海洋石油集团有限公司 | A kind of high temperature resisting type oil base drilling fluid pressure-bearing sealing agent and preparation method thereof |
| CN111100614A (en) * | 2019-12-02 | 2020-05-05 | 中国石油化工集团有限公司 | While-drilling plugging leak-proof oil-based drilling fluid suitable for shale gas old area encrypted well |
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| CN111808583A (en) * | 2020-08-07 | 2020-10-23 | 安徽陆海石油助剂科技有限公司 | Composite plugging agent bridge plug plugging particles for drilling fluid |
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| CN106085381A (en) * | 2016-06-02 | 2016-11-09 | 中国海洋石油总公司 | With brill pressure-bearing reinforcing agent and application thereof and oil base drilling fluid |
| CN108977181A (en) * | 2017-06-02 | 2018-12-11 | 中石化石油工程技术服务有限公司 | Oil base drilling fluid sealing agent and preparation method |
| CN108841366B (en) * | 2018-06-13 | 2020-09-04 | 中国石油天然气股份有限公司 | High-temperature leakage-proof plugging agent and preparation method and application thereof |
| CN108841366A (en) * | 2018-06-13 | 2018-11-20 | 中国石油天然气股份有限公司 | A kind of high temperature lost circulation prevention sealing agent and its preparation method and application |
| CN108793150A (en) * | 2018-08-08 | 2018-11-13 | 天津渤海中联石油科技有限公司 | A kind of elastic graphite and preparation method thereof |
| CN109097013A (en) * | 2018-09-06 | 2018-12-28 | 中国海洋石油集团有限公司 | A kind of high temperature resisting type oil base drilling fluid pressure-bearing sealing agent and preparation method thereof |
| CN111100614A (en) * | 2019-12-02 | 2020-05-05 | 中国石油化工集团有限公司 | While-drilling plugging leak-proof oil-based drilling fluid suitable for shale gas old area encrypted well |
| CN111154463A (en) * | 2019-12-27 | 2020-05-15 | 江苏长江机械化基础工程有限公司 | Lubricating liquid for grouting and drilling and preparation method thereof |
| CN111305804A (en) * | 2020-02-24 | 2020-06-19 | 中石化重庆涪陵页岩气勘探开发有限公司 | Drilling plug liquid for drilling bridge plug after fracturing of shale gas horizontal well and preparation method thereof |
| CN111849431A (en) * | 2020-07-29 | 2020-10-30 | 长江大学 | Composite plugging material for well drilling and application thereof |
| CN111849431B (en) * | 2020-07-29 | 2022-10-28 | 长江大学 | Composite plugging material for well drilling and application thereof |
| CN111808583A (en) * | 2020-08-07 | 2020-10-23 | 安徽陆海石油助剂科技有限公司 | Composite plugging agent bridge plug plugging particles for drilling fluid |
| CN111808583B (en) * | 2020-08-07 | 2022-11-15 | 安徽陆海石油助剂科技有限公司 | Composite plugging agent bridge plug plugging particles for drilling fluid |
| CN113956858A (en) * | 2021-08-09 | 2022-01-21 | 中国石油化工集团有限公司 | While-drilling pressure-bearing composite plugging agent for oil-based drilling fluid and preparation method thereof |
| CN115746805A (en) * | 2021-09-02 | 2023-03-07 | 中石化石油工程技术服务有限公司 | Thermoplastic elastomer for oil-based drilling fluid leakage stoppage and preparation method thereof |
| CN115926760A (en) * | 2022-11-09 | 2023-04-07 | 中石化石油工程技术服务有限公司 | Filling plugging agent for oil-based drilling fluid while drilling framework |
| CN116042195A (en) * | 2022-11-10 | 2023-05-02 | 四川康荣石油化工科技有限公司 | Broad-spectrum plugging oil-based drilling fluid and application thereof |
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