CN106753285A - A kind of high-temperature resistant water-based drilling fluid and preparation method thereof - Google Patents
A kind of high-temperature resistant water-based drilling fluid and preparation method thereof Download PDFInfo
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- CN106753285A CN106753285A CN201611121576.9A CN201611121576A CN106753285A CN 106753285 A CN106753285 A CN 106753285A CN 201611121576 A CN201611121576 A CN 201611121576A CN 106753285 A CN106753285 A CN 106753285A
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- 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
- C09K8/06—Clay-free compositions
- C09K8/12—Clay-free compositions containing synthetic organic macromolecular compounds or their precursors
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- 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
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Abstract
The invention discloses good water-base drilling fluid of a kind of high temperature resistant property and preparation method thereof, including base slurry and the high softening point bitumen liquid that is modified, the high softening point bitumen liquid that is modified includes modified high softening point bitumen particle, properties modifier, emulsifying agent and water.Modified high softening point bitumen mean particle size≤120 μm, including the core being made up of basic asphalt and the shell formed by modifying agent, according to the mass fraction, core is 7 ~ 9 parts, and shell is 1 ~ 3 part；The modifying agent includes polymerised sulphur and free sulphur, and the weight ratio of polymerised sulphur and free sulphur is 3 in modifying agent:7~7:3.High softening point bitumen liquid is with the addition of in drilling fluid of the invention, pitch particle therein is the mixture in the floor height bullet polymerised sulphur of basic asphalt outer cladding one and free sulphur, not only grain diameter is small, with certain elastic deformability, and high temperature resistant property is excellent, cutting property, the yield value of system and HTHP filtration reduction are glued so as to improve carrying for drilling fluid.
Description
Technical field
The present invention relates to a kind of drilling fluid and preparation method thereof, particularly containing the drilling fluid of modified high softening point bitumen,
Belong to oil drilling production technique field.
Background technology
As the development of Petroleum finance, drilling depth are constantly deepened, drilling strata is more and more complicated, directional well,
The quantity of the special wells such as horizontal well gradually increases.This makes drilling engineering to the performance of drilling fluid, particularly high temperature resistance
Ability proposes requirement higher.Asphalt product as important additive for drilling fluid, with good anti-collapse, lubrication, drop
The comprehensive effectiveness such as low leak-off and high-temperature stable.But general softening point asphalt be able to cannot meet because even trickling is overbated
High-temperature operation requirement under deep-well.
High softening point bitumen refer to softening point more than 100 DEG C, the especially pitch more than 120 DEG C.High softening-point is dripped
Green grass or young crops has to compare and is widely applied because of its outstanding high-temperature resistance.High softening point bitumen can be used for the brill in deep-seated oil gas field
In well operations, as the important component of drilling fluid, closure, anti-collapse, stabilizing borehole can be under the high temperature conditions played, reduced
The effect of filter loss.
In order to improve the performance of drilling fluid asphalt product, many methods are successively disclosed both at home and abroad pitch is entered
Row is modified.Wherein topmost method is exactly to carry out sulfonation to pitch.As US3485745, CN99109453,
CN201010250241 etc..Although this method can increase the water solubility of product, oil solution ratio is relatively low.After pitch is sulfonated
Sulfonate is mainly generated, the softening point of product is not almost measured and, can only be used under relatively low temperature conditionss.And its
Grain is poor without elasticity, deformability, it is impossible to the duct in any embedded well, particularly irregular shape duct, it is impossible to rise well
To closure and the effect of filtrate reducing.Meanwhile, this technique is more complicated, and pollution is easily caused to environment.
Drilling fluid is divided into oil base drilling fluid and water-base drilling fluid with its continuous phase.High softening-point asphalt is main with oil soluble
Based on property, so the good dispersion in oil base drilling fluid, using not being a problem.But in water-base drilling fluid, because its is water-soluble
Property very little, there is a problem of difficulties in dispersion, be difficult stabilization.This is also that restriction high softening point bitumen extensively should in water-base drilling fluid
One principal element.
When high softening point bitumen is used in drilling fluid, it is desirable to be distributed in mud system with minimum particle, so both
Can ensure that pitch is uniformly dispersed, can avoid being agglomerated into big block blocking vibration sieve and causing the problems such as cannot using again
Generation.Under normal circumstances, the Particle size requirements of pitch particle are below 150 μm, or even 120 μm have good use with lower section
Effect.
However, pitch belongs to temperature-sensitive material, in crushing or ultra-fine grinding, very big cost can be increased.Allow to
To tiny pitch particle, it is also very very difficult to want the stable dispersion in water-base drilling fluid.If if being unable to stable dispersion
Closure and filtrate reducing cannot be played a part of in underground.
The content of the invention
Low for the asphaltic products softening point used in drilling fluid of the prior art, particle is larger, divides in drilling fluid
Dissipate performance bad, it is impossible to meet the closure of drilling fluid, anti-collapse, stabilizing borehole well, reduce performance of filter loss etc. and ask
Topic, the present invention provide it is a kind of can high temperature resistance water-base drilling fluid, it includes a kind of drip containing modified high softening point bitumen particle
Blue or green liquid, its pitch particle particle diameter is small, can in water-base drilling fluid stable dispersion, substantially increase the closure of drilling fluid, anti-collapse, surely
Determine the borehole wall, reduce the performances such as filter loss.
Technical purpose of the invention is achieved through the following technical solutions：
A kind of high-temperature resistant water-based drilling fluid, in terms of mass fraction, the drilling fluid includes following component：
Base starches 80~95 parts
Modified 5~20 parts of high softening point bitumen liquid.
The modified high softening point bitumen liquid according to the mass fraction, including following components：
Modified high softening point bitumen grain diameter≤120 μm, including the core that is made up of basic asphalt and by modifying agent
The shell of formation, according to the mass fraction, core is 7~9 parts, and shell is 1~3 part；The modifying agent includes polymerised sulphur and free sulphur, is modified
The weight ratio of polymerised sulphur and free sulphur is 3 in agent:7~7:3.
Also include properties modifier and emulsifying agent in the modified high softening point bitumen liquid；The properties modifier is liquid
Coumarone indene resin, emulsifying agent is APES series or Span series.
Further, the basic asphalt is the pitch that softening point is 100~200 DEG C, selected from oxidized asphalt, solvent deoiling
At least one in pitch, bitumen.
Further, the modifying agent is to be heated to 250~350 DEG C of meltings by by sulphur, is passed through inert gas, is kept
0.5~2.0MPa of pressure, reaction carries out chilling and obtains after 10~100 minutes.
Further, also need to add precondition agent, chilling during chilling during preparing modifying agent by sulphur, during sulfur melting
Also need to add stabilizer in liquid.
Further, the precondition agent is selected from 1- 12 (carbon) alkene, 1- 14 (carbon) alkene, 1- 18 (carbon) alkene, fourth two
At least one in alkene, chlorobutadiene, isoprene, styrene, hexachloroparaxylene (HPX), iodonitrobenzene and bromo nitryl benzene；
Its addition is the 0.01~0.5% of sulphur weight；The stabilizer is selected from isopropanol, the chloro- n-butyl alcohols of 4-, the chloro- 1- hexanols of 6-
With at least one in 4- bromobenzene methyl alcohol；Its addition is the 0.01~0.5% of sulphur weight.
Another technical purpose of the invention is the preparation method for providing above-mentioned high-temperature resistant water base drilling fluid, including following step
Suddenly：
(1) modified high softening point bitumen liquid is prepared；
1. Cosan is heated to 250~350 DEG C, after 10~60 minutes, adds precondition agent, while inert gas is passed through,
0.5~2.0MPa of pressure is kept, is reacted 10~100 minutes, sulfur melting is polymerized, form liquid modifier；
2. basic asphalt is heated to molten condition in closed head tank, and being passed through inert gas protects raw material pressure tank
Hold in 0.2~1.0MPa；
3. the molten asphalt by step liquid modifier and step 1. 2. is sprayed into respectively from reaction tower two ends, both plus
It is 1~3 to enter amount by the mass ratio of sulphur and basic asphalt:7~9, make the two counter current contacting, kept for 10~60 minutes；
4. the product that 3. step obtains is injected in the quenching liquid containing stabilizer carries out chilling, forms coating modification agent
Pitch particle, and be suspended in quenching liquid, kept for 30~120 minutes under the conditions of 40~65 DEG C, sufficiently solidify and steady
It is fixed, liquid coumarone indene resin is then contained into modified high softening point bitumen as what a kind of properties modifier was added to above-mentioned preparation
In the quenching liquid of particle, while adding appropriate emulsifying agent, emulsified 10-60 minutes using high-shear emulsion machine, obtain described modified
High softening point bitumen liquid；Wherein pitch particle average grain diameter≤120 μm；
(2) the modified high softening point bitumen liquid prepared using step (1) prepares drilling fluid as a kind of modified component：Will be modified
High softening point bitumen liquid and base are starched, and are well mixed, and obtain the high-temperature resistant water-based drilling fluid.
Further, the industrial Cosan of top grade purity more than 99.5% of sulphur selection, the quenching liquid is water.
Compared with prior art, the invention has the advantages that：
(1) in the preparation process in accordance with the present invention, coated to pitch in sulfur melting polymerization and polymerised sulphur, free sulphur respectively
Grain is outer to spray into two stages additions precondition agent and stabilizers in quenching liquid, can improve the yield of high-elastic polymerised sulphur.It is molten in sulphur
Melt polymerization later stage introducing high softening point bitumen, can make high-elastic sulphur polymer that one layer of clad is formed outside pitch, after
After continuous cooling, stabilization treatment, organic whole is formed, improve the performance of modified pitch particle.
(2) in the inventive method, inert gas (such as N is introduced in sulphur polymerization process2), one is in order in high temperature
Under play a protective role, be on the other hand to provide enough power to the sulphur atomization after polymerization；Further, it is also possible to pass through pressure
The adjustment of power, carrys out the particle size of the final particle of modulation, so as to meet different use requirements.
(3) in general, after sulphur frit reaction, the conversion ratio of high-elastic polymerised sulphur is 40~60%, in this method and is not required to
The treatment such as to be extracted, be purified to it, although because the sulphur that this part does not convert can not be formed with high softening point bitumen
The entirety of machine, but it is good dispersant and interleaving agent, is conducive to pitch particle stable dispersion.
(4) when high softening point bitumen liquid is prepared, liquid coumarone indene resin is added as properties modifier, on the one hand,
The free sulphur for not having polymerization when preparing pitch particle is soluble in liquid coumarone indene resin, makes to be coated with the pitch of polymerised sulphur
Particle keeps good graininess and viscoelastic property.On the other hand, this part coumarone indene resin can adjust the stream of drilling fluid
Become performance, make the high softening point bitumen particle for being insoluble in water originally be easier to disperse in water-base drilling fluid, so that drilling fluid
System is more stablized.
(4) add modified high softening point bitumen liquid in water-base drilling fluid of the invention, and by modifying agent, emulsifying agent,
The synergy of the various additives such as properties modifier, can make that high softening point bitumen is particle stabilized to be dispersed in water-based drilling
In liquid.Method of the present invention process is simple, easy to operate, cost are relatively low, the pitch particle in obtained high softening point bitumen liquid
It is that not only grain diameter is small, with certain elastic deformability, Er Qiekang in the floor height bullet polymerised sulphur of basic asphalt outer cladding one
High-temperature behavior is excellent, of the invention so as to improve viscous cutting property, the yield value of system and the HTHP filtration reduction of carrying of drilling fluid
Drilling fluid can be used in the deep-well in oil field, ultra-deep well drilling operation.
Specific embodiment
Following non-limiting examples can make one of ordinary skill in the art be more fully understood the present invention, but not with
Any mode limits the present invention.
Described base slurry is the conventional water-based drilling liquid-based slurry in this area, can be prepared according to prior art conventional method,
The composition and preparation method of base slurry are known for those skilled in the art, for example, can be carried out according to following preparation process：Add in water
Enter natrium carbonicum calcinatum, add calcium bentonite, high-speed stirred is simultaneously obtained after conserving certain hour.
The base slurry preparation process used in the embodiment of the present invention is as follows：2.75g natrium carbonicum calcinatums are added in per 1000mL water,
60g calcium bentonites are added, high-speed stirred 20min conserves 24h at room temperature, obtain 6% fresh water-based slurry.
Embodiment 1
100g Cosans are placed in closed reactor, 270 DEG C are heated to, the 1- 12 of 0.12g is added after 50 minutes
(carbon) alkene, while being passed through N2Keep pressure 1.0MPa.By oxidized asphalt that 400g softening points are 125.4 DEG C in closed head tank
Molten condition is heated to, and is passed through N2Raw material pressure tank is set to be maintained at 0.6MPa, after the sulfur melting polymerization in question response kettle, together
When open the valve of reactor and asphalt stock tank, during two kinds of liquid are sprayed into contact towers, molten sulfur enters from tower top, melting
Pitch enters from tower bottom, the two is carried out sufficient counter current contacting, is kept for 30 minutes.Contact tower bottom discharge valve is opened, will
Liquid carries out chilling in being quickly injected to using the 500g cold water containing 0.20g isopropanols as quenching liquid, form appearance cladding poly-
The pitch particle of sulphur and free sulphur is closed, and is suspended in quenching liquid, kept for 30 minutes under the conditions of 45 DEG C, sufficiently solidified
And stabilization, add 35g liquid coumarone and 4.5g NPEs (NPEO), emulsification pretreatment 20 minutes to obtain described
Modified high softening point bitumen liquid；Wherein 120 μm of of pitch particle average grain diameter
The above-mentioned high softening point bitumen liquid of 30g is placed in the drilling well liquid-based slurry that 400mL is prepared, high speed shear 15 minutes,
Obtain high-temperature resistant water-based drilling fluid.
Embodiment 2
150g Cosans are placed in closed reactor, 300 DEG C are heated to, the chlorobutadiene of 0.20g are added after 45 minutes,
It is passed through N simultaneously2Keep pressure 1.2MPa.The solution-off pitch that 350g softening points are 140.2 DEG C is heated in closed head tank
Molten condition, and it is passed through N2Raw material pressure tank is set to be maintained at 0.8MPa, after the sulfur melting polymerization in question response kettle, while opening
The valve of reactor and asphalt stock tank, during two kinds of liquid are sprayed into contact towers, molten sulfur enters from tower top, molten asphalt from
Tower bottom enters, and the two is carried out sufficient counter current contacting, is kept for 25 minutes.Contact tower bottom discharge valve is opened, liquid is fast
Speed carries out chilling in being injected to using the 560g cold water of the chloro- n-butyl alcohols of the 4- containing 0.18g as quenching liquid, form appearance cladding
The pitch particle of polymerised sulphur and free sulphur, and be suspended in quenching liquid, kept for 40 minutes under the conditions of 50 DEG C, carry out sufficiently solid
Change and stablize, add 48g liquid coumarone and 6.2g OPEOs (OPEO), emulsification pretreatment 30 minutes to obtain institute
State modified high softening point bitumen liquid；Wherein 109 μm of pitch particle average grain diameter.
The above-mentioned high softening point bitumen liquid of 32g is placed in the drilling well liquid-based slurry that 400mL is prepared, high speed shear 20 minutes,
Obtain high-temperature resistant water base drilling fluid.
Embodiment 3
125g Cosans are placed in closed reactor, 320 DEG C are heated to, the chlordene of 0.20g is added after 50 minutes to two
Toluene, while being passed through N2Keep pressure 1.4MPa.The oxidized asphalt that 375g softening points are 153.8 DEG C is added in closed head tank
Heat is passed through N to molten condition2Raw material pressure tank is set to be maintained at 0.9MPa, after the sulfur melting polymerization in question response kettle, while
The valve of reactor and asphalt stock tank is opened, by two kinds of liquid penetrating contact towers, molten sulfur enters from tower top, melting drip
It is blue or green to enter from tower bottom, the two is carried out sufficient counter current contacting, kept for 45 minutes.Contact tower bottom discharge valve is opened, by liquid
Body carries out chilling in being quickly injected to using the 600g cold water of the 6- chlorine 1- hexanols containing 0.24g as quenching liquid, form appearance bag
The pitch particle of polymerised sulphur and free sulphur is covered, and is suspended in quenching liquid, kept for 30 minutes under the conditions of 45 DEG C, carried out sufficiently
Solidification and stabilization, add 50g liquid coumarone and 4.0g NPEs (NPEO), emulsification pretreatment 20 minutes to obtain
The modified high softening point bitumen liquid；Wherein 90 μm of pitch particle average grain diameter.
The above-mentioned high softening point bitumen liquid of 40g is placed in the drilling well liquid-based slurry that 400mL is prepared, high speed shear 20 minutes,
Obtain high-temperature resistant water base drilling fluid.
Embodiment 4
75g Cosans are placed in closed reactor, 300 DEG C are heated to, the isoprene of 0.15g are added after 60 minutes,
It is passed through N simultaneously2Keep pressure 1.6MPa.The solution-off pitch that 425g softening points are 167.9 DEG C is heated in closed head tank
Molten condition, and it is passed through N2Raw material pressure tank is set to be maintained at 1.0MPa, after the sulfur melting polymerization in question response kettle, while opening
The valve of reactor and asphalt stock tank, during two kinds of liquid are sprayed into contact towers, molten sulfur enters from tower top, molten asphalt from
Tower bottom enters, and the two is carried out sufficient counter current contacting, is kept for 30 minutes.Contact tower bottom discharge valve is opened, liquid is fast
Speed carries out chilling in being injected to using the 550g cold water of the 4- bromobenzene methyl alcohol containing 0.20g as quenching liquid, form appearance cladding poly-
The pitch particle of sulphur and free sulphur is closed, and is suspended in quenching liquid, kept for 40 minutes under the conditions of 50 DEG C, sufficiently solidified
And stabilization, add the Span-80 of 56g liquid coumarone and 7.2g, emulsification pretreatment 25 minutes to obtain the modified high softening-point drip
Blue or green liquid；Wherein 80 μm of pitch particle average grain diameter.
The above-mentioned high softening point bitumen liquid of 35g is placed in the drilling well liquid-based slurry that 400mL is prepared, high speed shear 30 minutes,
Obtain high-temperature resistant water base drilling fluid.
Comparative example 1
125g Cosans are placed in closed reactor, 320 DEG C are heated to, the chlordene of 0.20g is added after 50 minutes to two
Toluene, while being passed through N2Keep pressure 1.4MPa.The oxidized asphalt that 375g softening points are 153.8 DEG C is added in closed head tank
Heat is passed through N to molten condition2Raw material pressure tank is set to be maintained at 0.9MPa, after the sulfur melting polymerization in question response kettle, while
The valve of reactor and asphalt stock tank is opened, by two kinds of liquid penetrating contact towers, molten sulfur enters from tower top, melting drip
It is blue or green to enter from tower bottom, the two is carried out sufficient counter current contacting, kept for 45 minutes.Contact tower bottom discharge valve is opened, by liquid
Body carries out chilling in being quickly injected to using the 600g cold water of the 6- chlorine 1- hexanols containing 0.24g as quenching liquid, form appearance bag
The pitch particle of polymerised sulphur and free sulphur is covered, and is suspended in quenching liquid, kept for 30 minutes under the conditions of 45 DEG C, carried out sufficiently
Solidification and stabilization, add 4.0g NPEs (NPEO), emulsification pretreatment 20 minutes to obtain the modified high softening-point
Asphaltic liquid；Wherein 95 μm of pitch particle average grain diameter.
The above-mentioned high softening point bitumen liquid of 40g is placed in the drilling well liquid-based slurry that 400mL is prepared, high speed shear 20 minutes,
Obtain high-temperature resistant water base drilling fluid.
Comparative example 2
The oxidized asphalt that 450g softening points are 153.8 DEG C is placed in 500g water, at the same add 50g liquid coumarone and
4.0g NPEs (NPEO), using high-shear emulsion machine emulsification pretreatment 50 minutes, obtain high softening point bitumen liquid；
Wherein 115 μm of pitch particle average grain diameter.
The above-mentioned high softening point bitumen liquid of 40g is placed in the drilling well liquid-based slurry that 400mL is prepared, high speed shear 20 minutes,
Obtain high-temperature resistant water base drilling fluid.
Modified high softening point bitumen liquid to being obtained in embodiment 1~4 and the preparation process of comparative example 1~2 carry out dehydration and
Vacuumize dried process.Gained solid is sieved with vibratory sieve, high softening point bitumen particle is obtained.To high softening point bitumen
Particle carries out particle diameter, softening point and percent of pass is determined after sieve, and its result is as shown in table 1.
The particle diameter of pitch particle uses micro- sem observation, and carries scale measure with microscope.The method of testing of softening point
Carried out according to GB/T4507 methods.Percent of pass refers to after sieve：After particulate matter normal temperature is stacked 30 days, same apertures during with just preparation
Standard screen is sieved, and the percentage of gross mass is accounted for by the granular mass of sieve aperture.The index mainly investigates particulate matter by storage
Stability after depositing, i.e. change of size situation.
Water-base drilling fluid properties prepared by embodiment 1~4 and comparative example 1~2 are measured, as a result such as the institute of table 2
Show.From result, the modified high softening point bitumen prepared using the present invention is added in water-base drilling fluid under the high temperature conditions
High temperature and high pre ssure filtration can be substantially reduced, after adding properties modifier, the yield value of system is improved, and can improve taking for system
Ability with landwaste.
In table 2, aging condition：Time is 16 hours, 160 DEG C of temperature；Rheological characteristic test temperature is 60 DEG C；HTHP is filtered
Vector condition determination：160 DEG C, 3.5MPa；Viscosity and high temperature and high pre ssure filtration are carried out by the methods of GB/T 16783.
Embodiment 5
A kind of high-temperature resistant water-based drilling fluid, in terms of mass fraction, the drilling fluid includes following component：
Base starches 80 parts
Modified 20 parts of high softening point bitumen liquid.
The modified high softening point bitumen liquid according to the mass fraction, including following components：
Modified high softening point bitumen grain diameter≤120 μm, including the core that is made up of basic asphalt and by modifying agent
The shell of formation, according to the mass fraction, core is 7 parts, and shell is 3 parts；The modifying agent includes polymerised sulphur and free sulphur, gathers in modifying agent
The weight ratio for closing sulphur and free sulphur is 3:7.
Also include properties modifier and emulsifying agent in the modified high softening point bitumen liquid；The properties modifier is liquid
Coumarone indene resin, emulsifying agent is APES series.
The basic asphalt is the pitch that softening point is 100 DEG C, selected from oxidized asphalt.
The modifying agent is to be heated to 250 DEG C of meltings by by sulphur, is passed through inert gas, keeps pressure 0.5MPa, instead
Chilling is carried out after answering 10 minutes to obtain.
Also need to add precondition agent during preparing modifying agent by sulphur, during sulfur melting, also needed in chilling liquid during chilling
Add stabilizer.
The precondition agent is selected from hexachloroparaxylene (HPX)；Its addition is the 0.01% of sulphur weight；The stabilizer choosing
From the chloro- n-butyl alcohols of 4-；Its addition is the 0.01% of sulphur weight.
The preparation method of described a kind of high-temperature resistant water-based drilling fluid, comprises the following steps：
(1) modified high softening point bitumen liquid is prepared；
1. Cosan is heated to 250 DEG C, after 10 minutes, adds precondition agent, while being passed through inert gas, keeps pressure
0.5MPa, reacts 10 minutes, sulfur melting is polymerized, and forms liquid modifier；
2. basic asphalt is heated to molten condition in closed head tank, and being passed through inert gas protects raw material pressure tank
Hold in 0.2MPa；
3. the molten asphalt by step liquid modifier and step 1. 2. is sprayed into respectively from reaction tower two ends, both plus
It is 1 to enter amount by the mass ratio of sulphur and basic asphalt:9, make the two counter current contacting, kept for 10 minutes；
4. the product that 3. step obtains is injected in the quenching liquid containing stabilizer carries out chilling, forms coating modification agent
Pitch particle, and be suspended in quenching liquid, kept for 30 minutes under the conditions of 40 DEG C, sufficiently solidified and stablized, then will
Liquid coumarone indene resin is added to the quenching containing modified high softening point bitumen particle of above-mentioned preparation as a kind of properties modifier
In cold liquid, while adding appropriate emulsifying agent, emulsified 10 minutes using high-shear emulsion machine, obtain the modified high softening point bitumen
Liquid；Wherein pitch particle average grain diameter≤120 μm；
(2) the modified high softening point bitumen liquid prepared using step (1) prepares drilling fluid as a kind of modified component：Will be modified
High softening point bitumen liquid and base are starched, and are well mixed, and obtain the high-temperature resistant water-based drilling fluid.
The industrial Cosan of top grade purity more than 99.5% of sulphur selection, the quenching liquid is water.
Embodiment 6
A kind of high-temperature resistant water-based drilling fluid, in terms of mass fraction, the drilling fluid includes following component：
Base starches 95 parts
Modified 5 parts of high softening point bitumen liquid.
The modified high softening point bitumen liquid according to the mass fraction, including following components：
Modified high softening point bitumen grain diameter≤120 μm, including the core that is made up of basic asphalt and by modifying agent
The shell of formation, according to the mass fraction, core is 9 parts, and shell is 1 part；The modifying agent includes polymerised sulphur and free sulphur, gathers in modifying agent
The weight ratio for closing sulphur and free sulphur is 7:3.
Also include properties modifier and emulsifying agent in the modified high softening point bitumen liquid；The properties modifier is liquid
Coumarone indene resin, emulsifying agent is Span series.
The basic asphalt is the pitch that softening point is 200 DEG C, selected from bitumen.
The modifying agent is to be heated to 350 DEG C of meltings by by sulphur, is passed through inert gas, keeps pressure 2.0MPa, instead
Chilling is carried out after answering 100 minutes to obtain.
Also need to add precondition agent during preparing modifying agent by sulphur, during sulfur melting, also needed in chilling liquid during chilling
Add stabilizer.
The precondition agent is selected from isoprene；Its addition is the 0.5% of sulphur weight；The stabilizer is selected from 6-
Chloro- 1- hexanols；Its addition is the 0.5% of sulphur weight.
The preparation method of described a kind of high-temperature resistant water-based drilling fluid, it is characterised in that comprise the following steps：
(1) modified high softening point bitumen liquid is prepared；
1. Cosan is heated to 350 DEG C, after 60 minutes, adds precondition agent, while being passed through inert gas, keeps pressure
2.0MPa, reacts 100 minutes, sulfur melting is polymerized, and forms liquid modifier；
2. basic asphalt is heated to molten condition in closed head tank, and being passed through inert gas protects raw material pressure tank
Hold in 1.0MPa；
3. the molten asphalt by step liquid modifier and step 1. 2. is sprayed into respectively from reaction tower two ends, both plus
It is 3 to enter amount by the mass ratio of sulphur and basic asphalt:7, make the two counter current contacting, kept for 60 minutes；
4. the product that 3. step obtains is injected in the quenching liquid containing stabilizer carries out chilling, forms coating modification agent
Pitch particle, and be suspended in quenching liquid, kept for 120 minutes under the conditions of 65 DEG C, sufficiently solidified and stablized, then will
Liquid coumarone indene resin is added to the quenching containing modified high softening point bitumen particle of above-mentioned preparation as a kind of properties modifier
In cold liquid, while adding appropriate emulsifying agent, emulsified 60 minutes using high-shear emulsion machine, obtain the modified high softening point bitumen
Liquid；Wherein pitch particle average grain diameter≤120 μm；
(2) the modified high softening point bitumen liquid prepared using step (1) prepares drilling fluid as a kind of modified component：Will be modified
High softening point bitumen liquid and base are starched, and are well mixed, and obtain the high-temperature resistant water-based drilling fluid.
The industrial Cosan of top grade purity more than 99.5% of sulphur selection, the quenching liquid is water.
The property of high softening point bitumen particle in each embodiment of table 1.
The property of water-base drilling fluid in each embodiment of table 2.
Claims (10)
1. a kind of high-temperature resistant water-based drilling fluid, it is characterised in that：In terms of mass fraction, the drilling fluid includes following component：
Base starches 80 ~ 95 parts
Modified 5 ~ 20 parts of high softening point bitumen liquid.
2. a kind of high-temperature resistant water-based drilling fluid according to claim 1, it is characterised in that the modified high softening point bitumen
Liquid according to the mass fraction, including following components：
Modified 2 ~ 6 parts of high softening point bitumen particle
0.1 ~ 1 part of properties modifier
0.01 ~ 0.1 part of emulsifying agent
3 ~ 7 parts of water.
3. a kind of high-temperature resistant water-based drilling fluid according to claim 2, it is characterised in that the modified high softening point bitumen
Grain diameter≤120 μm, including the core being made up of basic asphalt and the shell formed by modifying agent, according to the mass fraction, core is 7 ~ 9
Part, shell is 1 ~ 3 part；The modifying agent includes polymerised sulphur and free sulphur, and the weight ratio of polymerised sulphur and free sulphur is 3 in modifying agent:7
~7:3。
4. a kind of high-temperature resistant water-based drilling fluid according to claim 2, it is characterised in that the modified high softening point bitumen
Also include properties modifier and emulsifying agent in liquid；The properties modifier is liquid coumarone indene resin, and emulsifying agent is poly- for alkyl phenol
Oxygen vinethene series or Span series.
5. a kind of high-temperature resistant water-based drilling fluid according to claim 3, it is characterised in that the basic asphalt is softening point
It is 100~200 DEG C of pitch, selected from least one in oxidized asphalt, solvent deoiling pitch, bitumen.
6. a kind of high-temperature resistant water-based drilling fluid according to claim 3, it is characterised in that the modifying agent is by by sulphur
Sulphur is heated to 250 ~ 350 DEG C of meltings, is passed through inert gas, keeps 0.5 ~ 2.0MPa of pressure, and reaction carries out urgency after 10 ~ 100 minutes
It is cold to obtain.
7. a kind of high-temperature resistant water-based drilling fluid according to claim 6, it is characterised in that modifying agent process is prepared by sulphur
In, also need to add precondition agent during sulfur melting, addition stabilizer is also needed during chilling in chilling liquid.
8. a kind of high-temperature resistant water-based drilling fluid according to claim 7, it is characterised in that the precondition agent is selected from 1- ten
Two（Carbon）Alkene, 1- 14（Carbon）Alkene, 1- 18（Carbon）Alkene, butadiene, chlorobutadiene, isoprene, styrene, chlordene are to diformazan
At least one in benzene, iodonitrobenzene and bromo nitryl benzene；Its addition is the 0.01 ~ 0.5% of sulphur weight；The stabilization
Agent is selected from least one in isopropanol, the chloro- n-butyl alcohols of 4-, the chloro- 1- hexanols of 6- and 4- bromobenzene methyl alcohol；Its addition is sulphur weight
The 0.01 ~ 0.5% of amount.
9. the preparation method of a kind of high-temperature resistant water-based drilling fluid according to claim 1, it is characterised in that including following step
Suddenly：
（1）Prepare modified high softening point bitumen liquid；
1. Cosan is heated to 250 ~ 350 DEG C, after 10 ~ 60 minutes, adds precondition agent, while being passed through inert gas, keeps pressure
0.5 ~ 2.0MPa of power, reacts 10 ~ 100 minutes, sulfur melting is polymerized, and forms liquid modifier；
2. basic asphalt is heated to molten condition in closed head tank, and being passed through inert gas is maintained at raw material pressure tank
0.2~1.0MPa；
3. the molten asphalt by step liquid modifier and step 1. 2. is sprayed into respectively from reaction tower two ends, both additions
It is 1 ~ 3 by the mass ratio of sulphur and basic asphalt:7 ~ 9, make the two counter current contacting, kept for 10 ~ 60 minutes；
4. the product that 3. step obtains is injected in the quenching liquid containing stabilizer carries out chilling, forms the pitch of coating modification agent
Particle, and be suspended in quenching liquid, kept for 30 ~ 120 minutes under the conditions of 40 ~ 65 DEG C, sufficiently solidified and stablized, then
Using liquid coumarone indene resin as a kind of properties modifier be added to above-mentioned preparation containing modified high softening point bitumen particle
In quenching liquid, while adding appropriate emulsifying agent, emulsified 10-60 minutes using high-shear emulsion machine, obtain the modified softening high
Point asphaltic liquid；Wherein pitch particle average grain diameter≤120 μm；
（2）With step（1）The modified high softening point bitumen liquid for preparing prepares drilling fluid as a kind of modified component：Modified height is soft
Change point asphaltic liquid and base slurry, be well mixed, obtain the high-temperature resistant water-based drilling fluid.
10. a kind of preparation method of high-temperature resistant water-based drilling fluid according to claim 9, it is characterised in that the sulphur choosing
The industrial Cosan of top grade purity more than 99.5% is selected, the quenching liquid is water.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4769288A (en) * | 1987-04-15 | 1988-09-06 | The Texas A & M University System | Sulfur-coated asphalt pellets |
| CN104559968A (en) * | 2013-10-22 | 2015-04-29 | 中国石油化工股份有限公司 | High-temperature resistant water-based drilling fluid and preparation method thereof |
-
2016
- 2016-12-08 CN CN201611121576.9A patent/CN106753285A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4769288A (en) * | 1987-04-15 | 1988-09-06 | The Texas A & M University System | Sulfur-coated asphalt pellets |
| CN104559968A (en) * | 2013-10-22 | 2015-04-29 | 中国石油化工股份有限公司 | High-temperature resistant water-based drilling fluid and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 王柳英: "不溶性硫磺的制备及性能研究", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 * |
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