CN107502315A - A kind of Environment-protecting Drilling Fluids with strong seal-off effect - Google Patents
A kind of Environment-protecting Drilling Fluids with strong seal-off effect Download PDFInfo
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- CN107502315A CN107502315A CN201710702198.1A CN201710702198A CN107502315A CN 107502315 A CN107502315 A CN 107502315A CN 201710702198 A CN201710702198 A CN 201710702198A CN 107502315 A CN107502315 A CN 107502315A
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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
- 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
- C09K8/032—Inorganic additives
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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
- C09K8/035—Organic additives
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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
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/22—Synthetic organic compounds
- C09K8/24—Polymers
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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
- C09K8/426—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging
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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
- C09K8/44—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing organic binders only
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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
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
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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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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention discloses a kind of Environment-protecting Drilling Fluids with strong seal-off effect, including 2 6% bentonite, 0.3 0.5% sodium carbonate, 0.3 0.5% inhibitor, 0.2 0.5% carry and viscous cut agent, 0.1 0.3% xanthans, 2 8% fluid loss additive, 2 5% sealing agent, 1 4% calcium carbonate, 0.5 4% lubricant, 25 250% inertia heavy weight additives；Nanometer sealing agent product as made from cladding AlOOH carbon ball, acrylamide, N N-isopropylacrylamides, hexa, reaction and vinyl acetate-ethylene copolymer emulsion compounding form, the Environment-protecting Drilling Fluids have sealing characteristics strong, greasy property is strong, rheological characteristic is good, it is strong to take landwaste ability, the characteristics of environment-friendly, be particularly suitable for use in environmental sensitive area area.
Description
Technical field
The present invention relates to petroleum gas field, more particularly to a kind of Environment-protecting Drilling Fluids with strong seal-off effect.
Background technology
In recent years, countries in the world government and local government of various countries have all worked out strict method to the waste discharge of drilling operation
Laws ＆ Regulations.Such as：Environmental Protection Agency regulation oppossum shrimp experimental liquid LC50When (50% lethal dose) value have to be larger than 30000mg/L, give up
Abandon well liquid just allows to ocean disposal.Britain, Holland, Norway require to test drilling wastes LC simultaneously50Value and biodegradation
Performance, to determine long-term influential effect of the drilling wastes to marine environment.China national ocean office issue country mark in 2008
It is accurate《Chinese Sea petroleum exploration and development Pollutant emission concentration limit value》, clear stipulaties have been done to rejected well drilling liquid discharge：Oil base
Drilling fluid and synthetic drilling fluid, drilling cuttings must not discharge into sea, water-base drilling fluid and drilling cuttings meet discharge standard and through place marine site
The discharge standard in sea, one-level marine site water-base drilling fluid and drilling cuttings can be arranged after authorities' approval：96h stagnophile toxicity LC50
>=30000mg/L, Hg contents≤1mg/L, Cd content≤3mg/L.These strict laws and regulations are constructed and discharged to drilling fluid
Bring stern challenge.
With the implementation of national new environmental law, the environmental issue in oil and gas exploration and development process must be from source
It is governed, is inevitable requirement using environment-friendly inorganic agent and brill, completion fluid system.Conventional drilling fluid system at present
Inorganic agent with polymer macromolecule coating agent, polymer small molecular fluid loss additive and Evaluating Method, sulfonation class drop filter
Lose based on agent.But these inorganic agent major part raw materials are poisonous, while again because the limitation of production technology, as end product
Remaining acrylamide, acrylonitrile, acrylic acid monomer in inorganic agent still noxious material containing part, such as polymer treatment agent, drip
Contain more condensed-nuclei aromatics in blue or green class inorganic agent, left phenol, aldehyde material etc. have stronger in phenolic resin class inorganic agent
Bio-toxicity, these materials undoubtedly can all pollute to wellsite environment, underground water etc..
The content of the invention
It is an object of the invention to provide a kind of Environment-protecting Drilling Fluids with strong seal-off effect, overcome above-mentioned prior art it
Deficiency, there is provided one kind had both met that drilling well produced needs, and the environmentally friendly drilling fluid of the effective environmental protection of and can, the present invention is by as follows
Technical scheme is realized：
A kind of Environment-protecting Drilling Fluids with strong seal-off effect, including 2-6% bentonite, 0.3-0.5% sodium carbonate,
0.3-0.5 inhibitor, carrying for 0.2-0.5% viscous cut agent, 0.1-0.3% xanthans, 2-8% fluid loss additive, 2-5%
Sealing agent, 1-4% calcium carbonate, 0.5-4% lubricant, 25-250% inertia heavy weight additives, each component content is quality
Content, in terms of the quality of water.
The sealing agent is by by 30-50 parts cladding AlOOH carbon ball, 10-20 parts acrylamide, 10-20 part N- isopropyls
Acrylamide, 2-4 parts hexa, product made from reaction and the second of 30-50 parts under 0.01-0.05 part initiators
Vinyl acetate-ethylene copolymerization emulsions are compounded in the presence of 2-5 part dispersants and formed.
The sealing agent plugging effect is good, small toxicity, has certain compression strength and high temperature resistant capability, has with drilling fluid
There is good compatibility.Coat and be coated with polyacrylamide-NIPA material again outside AlOOH carbon ball, have
There is micron-scale, internal rigid is outside flexible, easily enters in micropore or microcrack, plays a part of closure of building bridge, AlO+Substitute NH4+So that polyacrylamide-NIPA material and AlOOH have an effect and are easier to be coated on
Outside AlOOH balls；Some is not coated to polyacrylamide-NIPA material on AlOOH, tool
There is smaller size, in the hole or crack of the smaller nano-scale that can enter, play a part of closure of building bridge, and acetic acid second
Alkene ester-ethylene copolymerization emulsions compounding use has the function that Synergistic, and vinyl copolymer emulsion can be in crack
Place's stop forms film, because the bridge formation of polyacrylamide-NIPA material blocks, vinyl
The film that copolymer emulsion is formed around crack is not more fragile, strengthens plugging effect.NIPA is due to intramolecular
There are hydrophilic amide groups and hydrophobic isopropyl simultaneously, make its homopolymer that there is temperature sensitivity, in critical solution temperature
(40-65 DEG C) below, is dissolved in water, is easy to prepare drilling fluid；It is more than critical-temperature, the polar group aquation journey in macromolecular chain
Degree is reduced, and hydrophobic segment separates out from solution, is produced intramolecular and Interpolymer Association, in gel, can be attached to the borehole wall, is had
The sealing characteristics and temperature resistance and anti-salt property having had.Hexa, it is more stable at low temperature, so in building-up process
In, hexa does not participate in reaction (50-60 DEG C), is easily collapsed when sealing agent reaches stratum bottom, temperature is 100
During layer position more than DEG C, hexa (more than 100 DEG C) in hot environment can decompose generation formaldehyde, formaldehyde energy and acyl
Amine groups react, and crosslink polyacrylamide-NIPA, form gel, improve the anti-of sealing agent
Warm ability.
The preparation method of described sealing agent, comprises the following steps：
1) cladding AlOOH carbon ball is prepared
Glucose is dissolved into deionized water, glucose solution is made, hydro-thermal reaction 4- is carried out at 160-180 DEG C
6h, reaction are cooled to room temperature, centrifugal filtration, washed after terminating, drying, carbon ball is made；
Dilute sulfuric acid is added into sodium aluminate solution under conditions of stirring, the pH for adjusting solution is 4, then is added into solution
Enter urea and cetyl trimethylammonium bromide, stir, until solution is clarified, then add in the case of the stirring made from
Carbon ball, 90-100 DEG C is heated, 3-5h, is cooled to room temperature, be washed with deionized three times, drying, the carbon for coating AlOOH is made
Ball；
2) environment-friendly type water base drilling fluid sealing agent is prepared
30-50 parts cladding AlOOH carbon ball, 10-20 part acrylamides, 10-20 part N- isopropyls are added into deionized water
Base acrylamide, 2-4 part hexas, 60 DEG C stir；Under nitrogen protection, 0.01-0.05 parts are slowly added to draw
Agent is sent out, 50-60 DEG C of heating response 2-4 hour, obtains glue, adds water into glue, 2-5 part dispersants, after stirring,
30-50 part vinyl copolymer emulsions are slowly added to, produce environment-friendly type water base drilling fluid sealing agent.
Initiator in the step 2) is ammonium persulfate, potassium peroxydisulfate, one kind of azo diisobutyl amidine dihydrochloride.
Dispersant in the step 2) for span 80 or Tween 80 any one.
The fluid loss additive is modified starch fluid loss additive, it is preferable that the fluid loss additive is pre-gelatinized tapioca.
Described lubricant is plant oil modified lubricant, it is preferable that the plant oil modified lubricant changes for castor oil
Property lubricant.
Described carry viscous cuts agent as in low adhesive aggregation anionic cellulose, low viscous carboxymethyl cellulose and hydroxyethyl cellulose
One or more of combinations.
Described inhibitor is selected from polyamine, the one or more of polyetheramine.
Described calcium carbonate is the calcium carbonate of the mesh of 600 mesh -1500.
The inertia heavy weight additive is barite.
Beneficial effects of the present invention are：The Environment-protecting Drilling Fluids with strong seal-off effect are with good heat endurance, filter
Vector is very low, and the sealing agent and calcium carbonate of use can effectively block pore throat from nanoscale until close to grade, have
Strong sealing characteristics, being compared with traditional drilling fluid has the function that preferably to suppress shale hydration, prevents its expansion, caves in,
There is good effect to wellbore stability.Drilling fluid of the present invention has strong greasy property, reduces drilling rod frictional resistance, prevents from creeping into
Bit freezing problem in journey；With good rheological characteristic, take that landwaste ability is strong, be adapted to the construction of extended reach well.The drilling fluid of the present invention
EC5030000mg/L is all higher than, safety and environmental protection, can be achieved directly to discharge.
Embodiment
With reference to specific embodiment, the present invention is further elaborated.
Embodiment 1
The present invention provides a kind of Environment-protecting Drilling Fluids with strong seal-off effect, including 2% bentonite, 0.3% carbonic acid
Sodium, 0.3% polyamine, 0.2% low adhesive aggregation anionic cellulose, 0.3% xanthans, 2% pre-gelatinized tapioca,
2% sealing agent, 1% 600 mesh calcium carbonate, 0.5% castor oil modified lubricant, 25% barite, each component content are equal
For mass content, in terms of the quality of water.
The sealing agent preparation method is as follows：
1) glucose is dissolved into deionized water, glucose solution is made, glucose solution is then transferred to liner
For
In the Hydrothermal Synthesiss kettle of tetrafluoroethene, 6h is reacted at 160 DEG C, reacts and room temperature is cooled to after terminating, centrifugal filtration,
It is washed with deionized three times, drying, carbon ball is made.
2) added in the four-hole bottle equipped with mechanical agitator in sodium aluminate solution, then add dilute sulfuric acid regulation solution
PH be 4, then urea and cetyl trimethylammonium bromide are added into solution, stirring, until solution is clarified, then stirred
Obtained carbon ball in step 1 is added into four-hole bottle in the case of mixing, 90 DEG C of stirring 5h is heated, is cooled to room temperature, uses deionized water
Three times, drying, AlOOH balls are made in washing.
3) 30 parts of AlOOH balls are added in the four-hole bottle equipped with mechanical agitator, add 8 parts of acrylamides, 8 parts of N- are different
Propylacrylamide, 2 parts of hexas, 80 parts of deionized waters, 60 DEG C stir；Under nitrogen protection, it is slowly added to
0.01 part of ammonium persulfate, 50 DEG C of heating responses 4 hours, obtains glue, and 80 parts of deionized waters, 2 parts of this disks are added into glue
80, after stirring, 30 parts of vinyl copolymer emulsions are slowly added to, produce the closure of environment-friendly type water base drilling fluid
Agent.
Embodiment 2
The present invention provides a kind of Environment-protecting Drilling Fluids with strong seal-off effect, including 6% bentonite, 0.5% carbonic acid
Sodium, 0.5 polyamine ether, 0.2% low viscous carboxymethyl cellulose, 0.3% hydroxyethyl cellulose, 0.1% xanthans, 8%
Pre-gelatinized tapioca, 5% sealing agent, 4% 1250 mesh calcium carbonate, 4% castor oil modified lubricant, 200% weight
Spar, each component content is mass content, in terms of the quality of water.
The preparation method of the sealing agent is as follows：
1) same as Example 1, only hydrothermal reaction condition is different, reacts 4h at 180 DEG C.
2) sodium aluminate solution is added in the four-hole bottle equipped with mechanical agitator, then adds dilute sulfuric acid regulation solution
PH is 4, then urea and cetyl trimethylammonium bromide are added into solution, stirring, until solution clarification, is then being stirred
In the case of obtained carbon ball in step 1 added into four-hole bottle, heat 100 DEG C of stirring 3h, be cooled to room temperature, use deionized water
Three times, drying, AlOOH balls are made in washing.
3) 50 parts of AlOOH balls are added in the four-hole bottle equipped with mechanical agitator, add 10 parts of acrylamides, 10 parts of N-
N-isopropylacrylamide, 4 parts of hexas, 80 parts of deionized waters, 60 DEG C stir；Under nitrogen protection, slowly add
Enter 0.05 part of azo diisobutyl amidine dihydrochloride, 60 DEG C of heating responses 2 hours, obtain glue, adding 80 parts into glue goes
Ionized water, 5 parts of Tween 80s, after stirring, 50 parts of vinyl copolymer emulsions are slowly added to, produce environment-friendly type water
Base drilling fluid sealing agent.
Embodiment 3
A kind of Environment-protecting Drilling Fluids with strong seal-off effect of the present invention, including 4% bentonite, 0.4% sodium carbonate,
0.4 polyamine, 0.2% hydroxyethyl cellulose, 0.2% xanthans, 4% pre-gelatinized tapioca, 3% sealing agent,
3% 1500 mesh calcium carbonate, 2% castor oil modified lubricant, 250% barite, each component content is mass content,
In terms of the quality of water.
The preparation method of the sealing agent is as follows：
1) same as Example 1, only hydrothermal reaction condition is different, reacts 5h at 170 DEG C.
2) added in the four-hole bottle equipped with mechanical agitator in sodium aluminate solution, then add dilute sulfuric acid regulation solution
PH be 4, then urea and cetyl trimethylammonium bromide are added into solution, stirring, until solution is clarified, then stirred
Obtained carbon ball in step 1 is added into four-hole bottle in the case of mixing, 95 DEG C of stirring 4h is heated, is cooled to room temperature, uses deionized water
Three times, drying, AlOOH balls are made in washing.
3) 40 parts of AlOOH balls are added in the four-hole bottle equipped with mechanical agitator, add 9 parts of acrylamides, 9 parts of N- are different
Propylacrylamide, 3 parts of hexas, 80 parts of deionized waters, 60 DEG C stir；Under nitrogen protection, it is slowly added to
0.03 part of potassium peroxydisulfate, 55 DEG C of heating responses 3 hours, obtains glue, and 80 parts of deionized waters, 4 parts of tweens are added into glue
80, after stirring, 40 parts of vinyl copolymer emulsion CW40-707 are slowly added to, produce environmentally-friendly water-based drilling well
Liquid sealing agent.
Table 1 is a kind of Environment-protecting Drilling Fluids Evaluation results with strong seal-off effect, tests present invention brill under high temperature
The rheological property of well liquid, the index such as filtrate loss controllability and lubricating coefficient reduced rate.
The property of drilling fluid of table 1
Note：Rheological property measures at 50 DEG C, and conventional drilling liquid system density and the embodiment of the present invention 2 are identical.
As it can be seen from table 1 drilling fluid of the present invention has excellent performance, compared with conventional drilling liquid system, the present invention
Environment-protecting Drilling Fluids performance with strong seal-off effect is again in the case of low surface viscosity still with high yield value, explanation
Rheological property, large rock-carrying ability is strong, and drilling fluid of the present invention has good filtrate loss controllability and strong greasy property.
Table 2 is a kind of Environment-protecting Drilling Fluids toxicity assessment result with strong seal-off effect, tests the biology poison of drilling fluid
Property.
The drilling fluid bio-toxicity result of table 2
| Formula | EC50(mg/L) |
| Embodiment 1 | 2.1x105 |
| Embodiment 2 | 1.7x105 |
| Embodiment 3 | 2.6x105 |
Provided according in rower SY/T 6788-2010, EC50More than 25000mg/L, nontoxic, ring of the present invention is taken as
The EC of guarantor's type water-base drilling fluid sealing agent50It is far longer than 25000mg/L.
Claims (10)
1. a kind of Environment-protecting Drilling Fluids with strong seal-off effect, it is characterised in that bentonite, 0.3-0.5% including 2-6%
Sodium carbonate, 0.3-0.5 inhibitor, 0.2-0.5% carry it is viscous cut agent, 0.1-0.3% xanthans, 2-8% fluid loss additive,
2-5% sealing agent, 1-4% calcium carbonate, 0.5-4% lubricant, 25-250% inertia heavy weight additives, each component content are
Mass content, in terms of the quality of water；
The sealing agent is by by 30-50 parts cladding AlOOH carbon ball, 10-20 parts acrylamide, 10-20 part N- isopropyl propylene
Acid amides, 2-4 parts hexa, product made from reaction and the vinyl acetate of 30-50 parts under 0.01-0.05 part initiators
Ester-ethylene copolymerization emulsions are compounded in the presence of 2-5 part dispersants and formed.
2. there are the Environment-protecting Drilling Fluids of strong seal-off effect as claimed in claim 1, it is characterised in that the system of described sealing agent
Preparation Method, comprise the following steps：
1) cladding AlOOH carbon ball is prepared
Glucose is dissolved into deionized water, glucose solution is made, hydro-thermal reaction 4-6h is carried out at 160-180 DEG C, instead
Room temperature is cooled to after should terminating, centrifugal filtration, is washed, drying, carbon ball is made；
Dilute sulfuric acid is added into sodium aluminate solution under conditions of stirring, the pH for adjusting solution is 4, then urine is added into solution
Element and cetyl trimethylammonium bromide, stirring, until solution is clarified, then add in the case of the stirring made from carbon ball,
90-100 DEG C of heating, 3-5h, is cooled to room temperature, is washed with deionized three times, drying, and cladding AlOOH carbon ball is made；
2) sealing agent is prepared
30-50 parts cladding AlOOH carbon ball, 10-20 part acrylamides, 10-20 part N- isopropyls third are added into deionized water
Acrylamide, 2-4 part hexas, 60 DEG C stir；Under nitrogen protection, 0.01-0.05 part initiators are slowly added to,
50-60 DEG C of heating response 2-4 hour, glue is obtained, water is added into glue, 2-5 part dispersants, after stirring, is slowly added
Enter 30-50 part vinyl copolymer emulsions, produce sealing agent.
3. there are the Environment-protecting Drilling Fluids of strong seal-off effect as claimed in claim 2, it is characterised in that drawing in the step 2)
Hair agent is ammonium persulfate, potassium peroxydisulfate or azo diisobutyl amidine dihydrochloride.
4. there are the Environment-protecting Drilling Fluids of strong seal-off effect as claimed in claim 2, it is characterised in that point in the step 2)
Powder is span 80 or Tween 80.
5. there are the Environment-protecting Drilling Fluids of strong seal-off effect as claimed in claim 1, it is characterised in that the fluid loss additive is to change
Property starch fluid loss additive, it is preferable that the fluid loss additive is pre-gelatinized tapioca.
6. there are the Environment-protecting Drilling Fluids of strong seal-off effect as claimed in claim 1, it is characterised in that described lubricant is plant
Thing oil modified lubricant, it is preferable that the plant oil modified lubricant is castor oil modified lubricant.
7. there are the Environment-protecting Drilling Fluids of strong seal-off effect as claimed in claim 1, it is characterised in that described carry viscous cut agent and be
One or more of combinations in low adhesive aggregation anionic cellulose, low viscous carboxymethyl cellulose and hydroxyethyl cellulose.
8. there are the Environment-protecting Drilling Fluids of strong seal-off effect as claimed in claim 1, it is characterised in that described inhibitor is poly-
Amine and/or polyetheramine.
9. there are the Environment-protecting Drilling Fluids of strong seal-off effect as claimed in claim 1, it is characterised in that described calcium carbonate is
The calcium carbonate of the mesh of 600 mesh -1500.
10. there are the Environment-protecting Drilling Fluids of strong seal-off effect as claimed in claim 1, it is characterised in that the inertia heavy weight additive
For barite.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108913108A (en) * | 2018-09-14 | 2018-11-30 | 前郭县正泰化工有限公司 | A kind of well killing fluid, its composition and its preparation process |
| CN109233761A (en) * | 2018-11-09 | 2019-01-18 | 西南石油大学 | Modified Thermo-sensitive NIPAM bentonite and temperature response type drilling fluid |
| CN110105941A (en) * | 2019-05-20 | 2019-08-09 | 中国石油大学(华东) | Application and high temperature aqueous-based drilling fluid of the carbosphere as high temperature aqueous-based drilling fluid sealing agent |
| 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 |
| CN114958313A (en) * | 2022-04-19 | 2022-08-30 | 中国石油化工股份有限公司 | Water-based drilling fluid suitable for drilling compact oil horizontal well |
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| CN108913108A (en) * | 2018-09-14 | 2018-11-30 | 前郭县正泰化工有限公司 | A kind of well killing fluid, its composition and its preparation process |
| CN109233761A (en) * | 2018-11-09 | 2019-01-18 | 西南石油大学 | Modified Thermo-sensitive NIPAM bentonite and temperature response type drilling fluid |
| CN110105941A (en) * | 2019-05-20 | 2019-08-09 | 中国石油大学(华东) | Application and high temperature aqueous-based drilling fluid of the carbosphere as high temperature aqueous-based drilling fluid sealing agent |
| CN110105941B (en) * | 2019-05-20 | 2020-07-14 | 中国石油大学(华东) | Application of carbon microspheres as plugging agent for high-temperature water-based drilling fluid and high-temperature water-based drilling fluid |
| 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 |
| CN114958313A (en) * | 2022-04-19 | 2022-08-30 | 中国石油化工股份有限公司 | Water-based drilling fluid suitable for drilling compact oil horizontal well |
| CN114958313B (en) * | 2022-04-19 | 2023-09-19 | 中国石油化工股份有限公司 | Water-based drilling fluid suitable for drilling of tight oil horizontal well |
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